CN119825987A - Efficient construction device and construction method for mud-water balance jacking pipe to penetrate through railway roadbed - Google Patents
Efficient construction device and construction method for mud-water balance jacking pipe to penetrate through railway roadbed Download PDFInfo
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- CN119825987A CN119825987A CN202411461116.5A CN202411461116A CN119825987A CN 119825987 A CN119825987 A CN 119825987A CN 202411461116 A CN202411461116 A CN 202411461116A CN 119825987 A CN119825987 A CN 119825987A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to the technical field of tunnel construction, in particular to a high-efficiency construction device and a construction method for mud-water balance pipe jacking through railway roadbed, comprising deep well construction, equipment installation and debugging, hole jacking, equipment maintenance, grouting reinforcement and hole tapping, wherein a pipe jacking machine and the following first to third pipe sections are connected together by a pull rod to form a whole, and the three pipe sections are detached and lifted out after being completely tapped together with the pipe jacking machine; the oil cylinder has the beneficial effects that the oil cylinder body is arranged between the annular top plate and the rotating seat, the annular top plate and the rotating seat are connected with the end parts of the oil cylinder body through the connecting pins, the oil cylinder body can be conveniently detached, the rotating seat is rotatably arranged on the side surface of the mounting seat and is driven to rotate by the driving worm, and the oil cylinder body in a fault state can be rotated to the highest position so as to facilitate the hoisting and replacement of an external crane, thereby reducing the downtime and improving the construction efficiency.
Description
Technical Field
The invention relates to the technical field of tunnel construction, in particular to a high-efficiency construction device and a construction method for mud-water balance jacking pipe to pass through a railway roadbed.
Background
The pipe jacking construction is mainly based on the working principle that two foundation pit wells, namely a pipe jacking transmitting well and a receiving well, are firstly dug on the ground at intervals, then the friction force between a pipeline and surrounding soil is overcome by means of the jacking force generated by jacking equipment in the transmitting well, the pipeline is jacked into the soil according to the designed gradient, and the earthwork is carried away until a tool or a heading machine is pushed into the receiving well and lifted.
The invention of China with publication number CN117386391A discloses a pipeline mud-water balance type pipe jacking construction device, which ensures that pipeline feeding is kept in a straight line through the horizontal and vertical positions of a vertical cylinder and a transverse cylinder adjusting device.
However, at present, the influence of equipment fault shutdown on the whole construction period is larger, the installation position of a propulsion cylinder of traditional equipment is fixed, the equipment is not easy to hoist and replace when damaged by faults, the shutdown time is long, and the construction efficiency is reduced. Therefore, the invention provides a high-efficiency construction device and a construction method for mud-water balance jacking pipe to pass through a railway roadbed, which are used for solving the problems.
Disclosure of Invention
The invention aims to provide a high-efficiency construction device and a construction method for mud-water balance jacking pipe crossing railway roadbed, which are used for solving the problems of long fault shutdown time and low construction efficiency of the traditional equipment in the background technology.
In order to achieve the aim, the invention provides the following technical scheme that the high-efficiency construction method for the mud-water balance jacking pipe to pass through the railway roadbed specifically comprises the following steps:
Firstly, deep well construction, including deep well foundation pit excavation and well wall pouring sinking;
Step two, equipment installation and debugging, wherein the pipe jacking machine is hoisted into a working well by a crane for assembly and debugging, and the pipe jacking machine is jacked by a pipe jacking cylinder in the working well to move forward;
thirdly, jacking the hole, namely tunneling the pipe jacking machine head along a preset track, cutting soil body by a cutter disc at the front end of the pipe jacking machine head, stirring the soil body with muddy water, conveying the soil body to the ground by a mud discharging system, and jacking a pipe joint at the rear part of the pipe jacking machine by a pipe jacking cylinder in a working well;
Fourthly, overhauling equipment, when the pipe jacking oil cylinder in the working well fails, adjusting the position of the pipe jacking oil cylinder, and then lifting out and replacing the pipe jacking oil cylinder in time by a crane outside the working well, thereby reducing the downtime due to the failure;
Grouting reinforcement, namely grouting reinforcement is carried out on the railway subgrade around the pipe joint by adopting double slurry of cement slurry and water glass, wherein the grouting length is full length reinforcement along the pipe jacking direction;
step six, the pipe jacking machine is connected with the first pipe sections to the third pipe sections by pull rods to form a whole, and the three pipe sections are completely lifted out along with the pipe jacking machine and then the pipe jacking machine is disassembled and lifted out.
Preferably, in the first step, the deep well foundation pit is excavated in a layered manner, the middle part of the open caisson is excavated uniformly and symmetrically in the direction of the cutting edge, the thickness of each layer is controlled within 0.5m, after the earthwork of the middle part of the open caisson is excavated, 1.0-1.5 m of soil dike is reserved along the periphery of the cutting edge, each 2-3 m of soil dike is a section of symmetrically and uniformly skived soil layer in the direction of the cutting edge, the open caisson is ensured to sink stably, when the open caisson is sunk to about 1m above the designed elevation, the sinking speed is properly slowed down, at this time, the excavation depth of each layer is controlled to about 0.2m, and when the depth is about 0.5m from the designed elevation, the soil excavation is stopped, and the open caisson sinks to the designed elevation according to the dead weight, so as to avoid the phenomenon of sinking.
Preferably, in the first step, the well wall pouring adopts a construction process of twice pouring and once sinking, and the construction process comprises ground cushion layer construction, first-section well wall construction, second-section well wall construction, foundation pit excavation sinking well sinking, bottom plate back cover construction, top plate construction and brick top cover construction.
Preferably, in the third step, the jacking speed, the jacking force, the soil side pressure in the machine head soil bin and the cutter head torque are analyzed, the jacking speed is determined according to the soil pressure in the machine head soil bin, the machine head overload operation is forbidden according to the preset soil pressure in the machine head soil bin and the cutter head torque, meanwhile, the jacking process is measured and corrected on the ground, and in addition, an axial flow fan is adopted for ventilation and ventilation in the pipeline.
Preferably, in the fourth step, the pipe jacking cylinder comprises a plurality of cylinder bodies distributed in an annular array, two ends of the cylinder bodies are respectively connected with a rotating seat and an annular top plate, the rotating seat is rotatably installed on the side face of the installation seat, the installation seat is fixed on the side face of the rear seat wall, the side face of the annular top plate is attached to the pipe joint body, and the pipe joint body is located above the bottom plate and supported by the guide rail.
Preferably, a plurality of link that are annular array and distribute are all fixedly connected with to a side that annular roof and roating seat are close to the hydro-cylinder body, the link is "匚" font and the centre of a circle that annular roof was kept away from to the opening, waist hole has been seted up in the link middle part in a penetration way and through connecting pin and hydro-cylinder body swing joint, the tip of connecting pin is locked through the knob, and the side of knob is fixed with the backing ring.
Preferably, the rear seat wall side is provided with the bearing steel plate, a plurality of locating holes that are annular array and distribute are offered to bearing steel plate edge, the side of rear seat wall is pre-buried to be fixed with the built-in fitting of a plurality of locating holes one-to-one, built-in fitting surface is fixed with the screw thread post, the lateral wall of mount pad is fixed with the boss with a plurality of screw thread posts one-to-one, built-in fitting passes through the nut with mount pad, bearing steel plate and rear seat wall fixed connection.
Preferably, the middle part of roating seat rotates and is connected with the fixed column, and fixed column and mount pad fixed connection, the outside fixed cover of fixed column is equipped with the worm wheel ring, and the outside meshing of worm wheel ring has the driving worm, the driving worm is rotated by driving motor drive and the both ends of driving worm pivot all are provided with the worm frame, the worm frame is fixed in the roating seat side.
Preferably, the embedded part is arranged in an L shape and inserted into the rear seat wall, and a plurality of embedded bars distributed at equal intervals are fixed on the inner side of the embedded part.
Preferably, in the fifth step, grouting holes are reserved when the casing pipe joint is prefabricated, 4 grouting holes with the diameter of 5cm and the hole spacing of 2m are reserved at the reserved part of the casing pipe joint, the mass ratio of cement slurry to water glass during grouting is 1:1, the grouting amount is 20% of the soil volume, the grouting amount is controlled to be mainly, and the grouting pressure is smaller and is not more than 0.3MPa under the condition that the injection rate is more than 10L/min.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the oil cylinder body is arranged between the annular top plate and the rotating seat, the annular top plate and the rotating seat are connected with the end parts of the oil cylinder body through the connecting pins, the oil cylinder body can be conveniently detached, the rotating seat is rotatably arranged on the side surface of the mounting seat and is driven to rotate by the driving worm, and the oil cylinder body in a fault state can be rotated to the highest position so as to facilitate the hoisting and replacement of an external crane, thereby reducing the downtime and improving the construction efficiency.
Drawings
FIG. 1 is a perspective view of the overall structure of the present invention;
FIG. 2 is an exploded view of the structure of the annular top plate and the rotary base of the present invention;
FIG. 3 is a schematic diagram showing the connection of a rotary seat and a mounting seat according to the present invention;
FIG. 4 is a schematic perspective view of the annular top plate structure of the present invention;
FIG. 5 is a schematic perspective view of a connector structure according to the present invention;
FIG. 6 is an exploded view of the structure of the load bearing steel plate and the rear wall of the present invention;
Fig. 7 is a schematic perspective view of the structure of the embedded part of the present invention.
In the figure, 1, a rear seat wall, 2, an installation seat, 21, a boss, 22, a fixed column, 3, a rotating seat, 4, an annular top plate, 5, an oil cylinder body, 6, a connecting frame, 61, a waist hole, 62, a connecting pin, 63, a knob, 64, a backing ring, 7, a worm wheel ring, 8, a driving worm, 9, a worm rod frame, 10, a driving motor, 11, a bearing steel plate, 111, a positioning hole, 12, an embedded part, 121, a threaded column, 122, embedded steel bars, 13, a pipe section body, 14, a guide rail, 15 and a bottom plate.
Detailed Description
In order to make the objects, technical solutions, and advantages of the present invention more apparent, the embodiments of the present invention will be further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are some, but not all, embodiments of the present invention, are intended to be illustrative only and not limiting of the embodiments of the present invention, and that all other embodiments obtained by persons of ordinary skill in the art without making any inventive effort are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "center," "middle," "upper," "lower," "left," "right," "inner," "outer," "top," "bottom," "side," "vertical," "horizontal," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "a," an, "" the first, "" the second, "" the third, "" the fourth, "" the fifth, "and the sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
For purposes of brevity and description, the principles of the embodiments are described primarily by reference to examples. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments. It will be apparent, however, to one of ordinary skill in the art that the embodiments may be practiced without limitation to these specific details. In some instances, well-known methods and structures have not been described in detail so as not to unnecessarily obscure the embodiments. In addition, all embodiments may be used in combination with each other.
Referring to fig. 1 to 7, the present invention provides a technical solution:
the first embodiment is a high-efficiency construction method for mud-water balance jacking pipe to pass through railway roadbed, which specifically comprises the following steps:
firstly, deep well construction, including deep well foundation pit excavation and well wall pouring sinking, deep well comprises a working well and a receiving well, the well depth is 6.4-9.7m, deep well foundation pit is excavated in layers, the middle part of the self-sinking well is evenly and symmetrically excavated in the direction of a cutting edge, a long arm excavator is adopted for the sinking of the sinking well, each layer of thickness is controlled within 0.5m, after the earthwork of the middle part of the sinking well is excavated, 1.0-1.5 m of soil dike is reserved along the periphery of the cutting edge, each 2-3 m is used as a section of symmetrically and evenly skived soil layer in the direction of the cutting edge, stable sinking of the sinking well is ensured, when the sinking well is sunk to about 1m above a designed elevation, the sinking speed of each layer is controlled to be about 0.2m, when the sinking depth of each layer is about 0.5m from the designed elevation, the sinking well is stopped to the designed elevation according to the self weight of the sinking well, and the phenomenon of sinking is avoided;
The side mould of the well body of the sunk well adopts a wood mould, a counter-pulling screw adopts a pull rod with the diameter phi 14 to carry out counter-pulling, a small edge adopts steel pipes with the diameter phi 48 x 3.5mm, the distance is 15cm, a large edge adopts double steel pipes with the diameter phi 48 x 3.5mm, the distance is 50cm, the inner side of the well body adopts steel pipes to set counter-supporting, every 2m along the vertical direction of the well body is connected, the inner side and the outer side of the well wall adopt steel pipes to set up a cast support, the cast support is connected into a whole through a horizontal steel pipe, the bottom of the cast support adopts steel bars to limit, casting support sliding is prevented, the top plate of the sunk well adopts a coiled support for construction, the distance between vertical rods of the support is 0.9 x 0.9m, the step distance is 1.5m, longitudinal beams at the upper part of the support adopt square wood with the diameter of 10 x10 cm, and a bottom mould adopts wood mould with the diameter of 2 cm;
The well wall pouring of the open caisson adopts a construction process of twice pouring and once sinking, comprising ground cushion layer construction, first-section well wall construction, second-section well wall construction, foundation pit excavation open caisson sinking, bottom plate bottom sealing construction, top plate construction, brick construction and top sealing, and well cover is arranged, and plain soil is adopted to carry out open caisson backfill after the construction is completed;
the upper opening of the open caisson is provided with a protective railing, and (5) hanging a dense mesh safety net on the outer side.
Step two, equipment installation and debugging, wherein the pipe jacking machine is hoisted into a working well by a crane for assembly and debugging, and the pipe jacking machine is jacked by a pipe jacking cylinder in the working well to move forward;
Thirdly, jacking a hole, namely tunneling a pipe jacking machine head along a preset track, cutting soil by a cutter disc at the front end of the pipe jacking machine head, stirring with muddy water, conveying the muddy water to the ground by a mud discharging system, jacking a pipe joint at the rear part of the pipe jacking machine by a pipe jacking cylinder in a working well, analyzing jacking speed, jacking force, soil lateral pressure in a machine head soil bin and cutter disc torque, jacking the jacking speed according to the soil pressure in the machine head soil bin, jacking the machine head according to the soil pressure in the machine head soil bin and the cutter disc torque strictly, prohibiting overload operation of the machine head, measuring and correcting the jacking process on the ground, and adopting an axial-flow fan to perform ventilation in a pipeline;
The method is characterized in that coordinates and elevations of each point on the ground are required to be introduced into the pit in the jacking process, the compiling difference of the horizontal and elevation of a jacking pipeline is measured by a laser theodolite, an instrument is fixed on a bottom plate of a sunk well, a computer-controlled laser receiving target is fixed at the front end of a machine head, the coordinates are centered on a central axis of a heading machine, the laser theodolite is always started in the jacking process, and a machine head operator analyzes deviation development trend by observing laser spot movement data and jacking length on a computer display screen, so that a deviation correcting method to be adopted is determined. The laser theodolite is required to be corrected in the elevation direction and the horizontal direction according to the specified jacking length or measurement time, and the elevation direction can be corrected at any time in jacking by using a communicating vessel;
the correction in the jacking process is divided into two cases, namely, correction in the initial jacking process, mastering the jacking direction in the initial jacking process, and enabling the jacking of the pipeline to be smooth because larger deviation is not easy to generate when the pipeline is jacked in the later process, so that the initial jacking axis, the height and the jacking speed are strictly controlled, the detection frequency is enhanced, and correction in the jacking process is emphasized, the principles of correction and correction are emphasized, the correction is to be performed on the direction of the heading machine, the correction measures are to be adopted when the direction of the heading machine is to be observed and recorded on the duty, and correction measures are to be adopted when the small deviation correction angle is to be used, so that the jacked heading machine slowly returns to the position of the designed axis in a longer section of jacking process;
Fourthly, overhauling equipment, when the pipe jacking oil cylinder in the working well fails, adjusting the position of the pipe jacking oil cylinder, and then lifting out and replacing the pipe jacking oil cylinder in time by a crane outside the working well, thereby reducing the downtime due to the failure;
Grouting reinforcement, namely grouting reinforcement is carried out on railway roadbed around a pipe joint by adopting double slurry of cement slurry and water glass, wherein the grouting length is full length reinforcement along the pipe jacking direction, grouting holes are reserved when a sleeve pipe joint is prefabricated, 4 grouting holes with the diameter of 5cm and the hole spacing of 2m are reserved at the reserved part of the sleeve pipe joint, the mass ratio of the cement slurry to the water glass during grouting is 1:1, the grouting amount is 20% of the soil volume, the grouting amount is controlled to be mainly, and the grouting pressure is smaller under the condition that the grouting rate is larger than 10L/min and is not more than 0.3MPa;
step six, taking out a hole, connecting the pipe pushing bench and the following first to third pipe sections together by using a pull rod to form a whole, dismantling and hanging the pipe pushing bench out after the three pipe sections are taken out of the hole together with the pipe pushing bench, taking out a sealing door of the hole, retaining an outer layer steel bar when a reserved hole of a sunk well is prefabricated, pouring outer layer 80mm thick concrete in time, and temporarily plugging the reserved hole to the sealing door by using MU10 bricks;
The hole-making procedure is as follows:
① A long jacking guide rail is connected in the reserved hole, and a limiting block is made;
② Cutting an outer sealing door steel beam in the hole ring, and loosening the steel plate pile top in the hole by using a 50T hydraulic jack;
③ Jacking the push bench into the water stop belt until the end of the push bench is about 10cm away from the outer sealing door;
④ Removing the inner sealing door;
⑤ Chiseling the temporary blocking door of the brick, and chiseling the reinforced concrete wall with the thickness of 80mm at the outer side;
⑥ A limiting block is welded at the tail part of the pipe jacking machine, so that the pipe jacking machine is prevented from retracting under the action of a soil body on the front surface when the main jack retracts;
⑦ Retracting the main jack, and hoisting the concrete pipe joint;
⑧ Removing the limiting block and continuously jacking;
⑨ When the hole is formed, the measurement must track and observe the state of the push bench, timely feeding back and guiding the main jacking oil cylinder to correct the deviation, and ensuring the accuracy of an initial jacking axis;
⑩ After the pipe is taken out of the hole, the pipe pushing bench and the first section to the third section of the concrete pipe section are connected together by a pull rod to form a whole, and the stability is increased after the pipe pushing bench and the concrete pipe section are connected together, so that the pipe pushing bench is very beneficial to the jacking construction in the first stage after the pipe is taken out of the hole, and is convenient to control the pipe pushing bench in the later jacking construction.
In order to install the pipe jacking cylinder, the pipe jacking cylinder further comprises a fourth step, the pipe jacking cylinder comprises a plurality of cylinder bodies 5 distributed in an annular array, the cylinder bodies 5 are controlled to stretch and retract by hydraulic oil, two ends of the cylinder bodies 5 are respectively connected with a rotating seat 3 and an annular top plate 4, the rotating seat 3 is rotatably installed on the side face of the installation seat 2, the installation seat 2 is fixed on the side face of the rear seat wall 1, the side face of the annular top plate 4 is attached to the pipe joint body 13, the pipe joint body 13 is located above the bottom plate 15 and supported by the guide rail 14, the annular top plate 4 is driven to move when the cylinder bodies 5 are in operation extension, the pipe joint body 13 is pushed by the annular top plate 4 to move along the length direction of the guide rail 14 when the pipe joint body 13 is located in a working well, lateral deflection is avoided, then the cylinder bodies 5 are contracted, a space is generated between the annular top plate 4 and the pipe joint body 13 for the next pipe joint body 13 to be put in, the process is repeated, and the rear seat wall 1 continuously pushes the pipe joint body 13 forwards.
In order to facilitate the disassembly and replacement of the oil cylinder body 5, the application is also provided with a plurality of connecting frames 6 which are distributed in an annular array and fixedly connected to one side surface of the annular top plate 4 and one side surface of the rotating seat 3, which is close to the oil cylinder body 5, wherein the connecting frames 6 are in a shape of '匚' and are open and far away from the center of the annular top plate 4, the middle part of each connecting frame 6 is provided with a waist hole 61 in a penetrating way and is movably connected with the oil cylinder body 5 through a connecting pin 62, the end part of each connecting pin 62 is locked through a knob 63, and the side surface of each knob 63 is fixedly provided with a backing ring 64, as shown in fig. 4 and 5, both ends of the oil cylinder body 5 are connected and positioned by the connecting pins 62, when one oil cylinder body 5 breaks down and is damaged, the oil cylinder body 5 can be disassembled and replaced quickly, the arrangement of the waist holes 61 can prevent the thrust of the oil cylinder body 5 from being applied to the connecting pins 62 in the extending process, that is to the rotating seat 3 and the annular top plate 4, and the connecting pins 62 can not be influenced, so that the connecting pins 62 can be disassembled by workers more conveniently.
In order to reduce the local stress of the rear seat wall 1, the application also comprises a bearing steel plate 11 arranged on the side surface of the rear seat wall 1, a plurality of positioning holes 111 distributed in an annular array are formed at the edge of the bearing steel plate 11, embedded parts 12 corresponding to the positioning holes 111 one by one are pre-embedded and fixed on the side surface of the rear seat wall 1, threaded columns 121 are fixed on the surface of the embedded parts 12, bosses 21 corresponding to the threaded columns 121 one by one are fixed on the side wall of the mounting seat 2, the bearing steel plate 11 and the rear seat wall 1 are fixedly connected by the embedded parts 12 through nuts, as shown in fig. 6 and 3, the mounting seat 2, the bearing steel plate 11 and the rear seat wall 1 are fixedly connected, the thrust exerted by the cylinder body 5 on the rotary seat 3 is borne by the rear seat wall 1, the thrust exerted by the bearing steel plate 11 and the mounting seat 2 is uniformly dispersed, and the local stress of the rear seat wall 1 is reduced.
In order to facilitate the disassembly and lifting of the oil cylinder body 5, the application is also provided with the fixed column 22 which is rotationally connected with the middle part of the rotating seat 3, the fixed column 22 is fixedly connected with the mounting seat 2, the outside of the fixed column 22 is fixedly sleeved with the worm wheel ring 7, the outside of the worm wheel ring 7 is meshed with the driving worm 8, the driving worm 8 is driven to rotate by the driving motor 10, both ends of the rotating shaft of the driving worm 8 are provided with the worm rack 9, the worm rack 9 is fixed on the side surface of the rotating seat 3, as shown in fig. 3, the driving motor 10 drives the driving worm 8 to rotate, and the driving worm 8 is meshed with the worm wheel ring 7, and the worm wheel ring 7, the fixed column 22 and the mounting seat 2 are fixedly connected, so the rotating seat 3 can rotate around the fixed column 22 under the driving of the driving motor 10, when a certain oil cylinder body 5 fails and is damaged, the rotating to the highest position, thereby facilitating the lifting of the external crane, and simultaneously, the opening of the connecting rack 6 connected with the oil cylinder body 5 is just upwards, and the disassembly of the oil cylinder body 5 is not blocked.
In order to improve the embedded strength of the embedded part 12, the embedded part 12 is arranged in an L shape and inserted into the back seat wall 1, and a plurality of embedded bars 122 distributed at equal intervals are fixed on the inner side of the embedded part 12, as shown in fig. 7, the embedded strength of the embedded part 12 on the side surface of the back seat wall 1 can be improved by arranging the embedded bars 122, so that the embedded part is prevented from falling easily.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The efficient construction device for the mud-water balance jacking pipe crossing the railway roadbed is characterized by comprising a jacking pipe oil cylinder, wherein the jacking pipe oil cylinder comprises a plurality of oil cylinder bodies (5) distributed in an annular array, two ends of each oil cylinder body (5) are respectively connected with a rotating seat (3) and an annular top plate (4), the rotating seats (3) are rotatably arranged on the side surfaces of mounting seats (2), the mounting seats (2) are fixed on the side surfaces of rear seat walls (1), the side surfaces of the annular top plates (4) are attached to pipe joint bodies (13), and the pipe joint bodies (13) are positioned above a bottom plate (15) and supported by guide rails (14);
The connecting frame is characterized in that a plurality of connecting frames (6) which are distributed in an annular array are fixedly connected to one side face, close to the oil cylinder body (5), of the annular top plate (4) and the rotating seat (3), the connecting frames (6) are in a shape like 匚' and are open to be away from the circle center of the annular top plate (4), waist holes (61) are formed in the middle of the connecting frames (6) in a penetrating mode and are movably connected with the oil cylinder body (5) through connecting pins (62), the end portions of the connecting pins (62) are locked through knobs (63), and backing rings (64) are fixed to the side faces of the knobs (63).
2. The efficient construction device for the mud-water balance jacking pipe to pass through the railway roadbed is characterized in that a bearing steel plate (11) is arranged on the side face of the rear seat wall (1), a plurality of positioning holes (111) distributed in an annular array are formed in the edge of the bearing steel plate (11), embedded parts (12) corresponding to the positioning holes (111) one by one are pre-buried and fixed on the side face of the rear seat wall (1), threaded columns (121) are fixed on the surface of the embedded parts (12), bosses (21) corresponding to the threaded columns (121) one by one are fixed on the side wall of the mounting seat (2), and the bearing steel plate (11) and the rear seat wall (1) are fixedly connected through nuts by the embedded parts (12).
3. The efficient construction device for the mud-water balance jacking pipe to pass through the railway roadbed is characterized in that a fixed column (22) is rotationally connected to the middle of a rotating seat (3), the fixed column (22) is fixedly connected with a mounting seat (2), a worm wheel ring (7) is fixedly sleeved on the outer side of the fixed column (22), a driving worm (8) is meshed on the outer side of the worm wheel ring (7), the driving worm (8) is driven to rotate by a driving motor (10), worm rod frames (9) are arranged at two ends of a rotating shaft of the driving worm (8), and the worm rod frames (9) are fixed on the side face of the rotating seat (3).
4. The efficient construction device for the muddy water balance jacking pipe to pass through the railway roadbed according to claim 3, wherein the embedded part (12) is arranged in an L shape and is inserted into the rear seat wall (1), and a plurality of embedded bars (122) distributed at equal intervals are fixed on the inner side of the embedded part (12).
5. The efficient construction method for the muddy water balance jacking pipe to pass through the railway roadbed according to any one of claims 1 to 4 is characterized by comprising the following steps:
Firstly, deep well construction, including deep well foundation pit excavation and well wall pouring sinking;
Step two, equipment installation and debugging, wherein the pipe jacking machine is hoisted into a working well by a crane for assembly and debugging, and the pipe jacking machine is jacked by a pipe jacking cylinder in the working well to move forward;
thirdly, jacking the hole, namely tunneling the pipe jacking machine head along a preset track, cutting soil body by a cutter disc at the front end of the pipe jacking machine head, stirring the soil body with muddy water, conveying the soil body to the ground by a mud discharging system, and jacking a pipe joint at the rear part of the pipe jacking machine by a pipe jacking cylinder in a working well;
Fourthly, overhauling equipment, when the pipe jacking oil cylinder in the working well fails, adjusting the position of the pipe jacking oil cylinder, and then lifting out and replacing the pipe jacking oil cylinder in time by a crane outside the working well, thereby reducing the downtime due to the failure;
Grouting reinforcement, namely grouting reinforcement is carried out on the railway subgrade around the pipe joint by adopting double slurry of cement slurry and water glass, wherein the grouting length is full length reinforcement along the pipe jacking direction;
step six, the pipe jacking machine is connected with the first pipe sections to the third pipe sections by pull rods to form a whole, and the three pipe sections are completely lifted out along with the pipe jacking machine and then the pipe jacking machine is disassembled and lifted out.
6. The method for efficiently constructing the mud-water balanced jacking pipe through the railway roadbed according to claim 5, wherein in the first step, deep well foundation pits are excavated in a layered manner, soil is excavated uniformly and symmetrically from the middle of the sinking well towards the cutting edge, the thickness of each layer is controlled within 0.5m, after the earthwork of the middle part of the sinking well is excavated, 1.0-1.5 m of soil dykes are reserved along the periphery of the cutting edge, each 2-3 m of the soil dykes is a section of thinned soil layer which is symmetrical and uniform towards the cutting edge, stable sinking of the sinking well is ensured, sinking speed is properly slowed down when the sinking well is sunk to 1m above a design elevation, at the moment, the excavation depth of each layer is controlled to be about 0.2m, and when the sinking depth is about 0.5m from the design elevation, the soil is stopped from sinking to the design elevation according to the dead weight of the sinking well, and the phenomenon of sinking is avoided.
7. The efficient construction method for the muddy water balance jacking pipe to pass through the railway roadbed according to claim 6, wherein in the first step, the construction process of twice pouring and once sinking is adopted for well wall pouring, and the construction process comprises the steps of ground cushion layer construction, first-section well wall construction, second-section well wall construction, foundation pit excavation sinking, bottom plate back cover construction, top plate construction and bricking back cover arrangement well cover.
8. The method for efficiently constructing the mud-water balanced jacking pipe through the railway roadbed according to claim 7, wherein in the third step, jacking speed, jacking force, soil side pressure in a machine head soil bin and cutter head torque are analyzed, the jacking speed is determined according to the soil pressure in the machine head soil bin, the machine head overload operation is forbidden according to the preset soil pressure in the machine head soil bin and the preset cutter head torque, meanwhile, the jacking process is measured and corrected on the ground, and in addition, an axial-flow fan is adopted for ventilation in a pipeline.
9. The efficient construction method for the mud-water balance jacking pipe to pass through the railway subgrade according to claim 8, wherein in the fifth step, grouting holes are reserved when a casing pipe joint is prefabricated, 4 grouting holes with the diameter of 5cm and the hole spacing of 2m are reserved in the reserved part of the casing pipe joint, the mass ratio of cement paste to water glass during grouting is 1:1, the grouting amount is 20% of the soil mass, the grouting amount is controlled mainly, and the grouting pressure is smaller under the condition that the injection rate is larger than 10L/min and is not more than 0.3MPa.
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