CN116892191A - Construction method of thin-wall water measuring weir - Google Patents

Abstract

The invention discloses a construction method of a thin-walled water measuring weir. The construction method is to install the thin-walled water measuring weir in a reserved groove of a channel, and includes: processing the weir sill, the first and second weir tops and the weir opening plate; according to Cut the weir sill according to the width and shape of the channel, apply a layer of water-stop glue on the top and bottom of the weir sill, and insert the weir sill into the reserved groove; cut the first and second weir tops respectively. Insert them into the reserved groove in sequence; install the weir plate at the weir mouth; apply water-stop glue on the water-facing side, and install a silt drainage door on the back-water side. The water weir of the present invention can be prefabricated in batches and assembled on site, has a short processing cycle, is light in weight, does not require lifting equipment during installation, and is simple and convenient to construct, thereby improving construction efficiency and meeting the rapid construction needs of farmland water conservancy projects; during on-site assembly, it can be The channels are cut on site to meet the assembly needs of different channels; according to the channel flow parameters, the weir mouth of the main body of the water weir can also be processed into different structures.

Description

Construction method of thin-walled water measuring weir

Technical field

The present invention relates to water weirs, and in particular to a construction method of thin-walled water weirs.

Background technique

In recent years, in order to ensure food security, the country has comprehensively implemented the strategy of storing grain in the land and storing grain in technology, improved the comprehensive grain production capacity, and accelerated the construction of high-standard farmland. The biggest features of high-standard farmland projects are "short, flat and fast", and there are a large number of water conservancy buildings. This requires the structural types of each water conservancy building to be simplified as much as possible to make them adapt to the requirements of high-standard farmland construction and shorten the construction period so as not to affect farmers' work. A season of farming.

Measuring weirs are a necessary building for farmland water conservancy projects. They are generally made of stainless steel or concrete as an integrated structure. Their size and type need to be determined according to the size and type of the channel. As a result, the size and type of water measuring weirs are diverse, which makes the amount of water weirs diverse. Water weirs require large production volumes, long processing cycles, heavy weight, inconvenient construction, and high dimensional processing accuracy requirements. They cannot meet the requirements for rapid construction of farmland water conservancy projects, and cannot meet the requirements for refined and high-quality development of farmland water conservancy projects. Therefore, how to improve the processing efficiency of water measuring weirs, reduce construction difficulty, and improve construction efficiency is crucial to farmland construction projects.

Contents of the invention

In view of this, the present invention provides a construction method for a thin-walled water weir. The water weir is a split structure, light in weight, easy to transport and assemble on site, and can be cut on site according to the cross section of the channel. It has high versatility and can meet the needs of farmland water conservancy projects. rapid construction needs.

In order to achieve the above objects, the present invention adopts the following technical solutions:

The construction method of the thin-walled water measuring weir of the present invention is to install the thin-walled water measuring weir in the reserved groove of the channel. The thin-walled water measuring weir includes a water weir main body, and a drainage pipe arranged on the water weir main body. The silt opening and sealing structure are provided on the silt discharge opening;

The main body of the water weir is an assembled structure, including a weir sill and a weir top structure that are clamped in the reserved groove from bottom to top. The height of the weir sill is ≥ 3/5 of the height of the main body of the water weir; The weir crest structure includes a first weir crest and a second weir crest that are connected in sequence from bottom to top, and there is at least one second weir crest;

A weir opening with a triangular, rectangular or trapezoidal structure is provided in the middle of the weir crest structure, and a weir opening plate is provided at each edge of the weir opening, and the weir opening plate is fixedly connected to the weir crest structure through bolts;

An arc-shaped groove is provided on the weir sill located at the upper edge of the silt discharge outlet, and the arc-shaped groove is provided on the back surface of the water weir main body; the blocking structure includes a rotating structure with the arc-shaped groove A matching connector and a silt discharge door fixed on the connector; a magnetic sealing connector arranged along the circumferential direction of the silt discharge port is installed on the weir sill, and the magnetic sealing connector connects the The silt discharge door is sealed at the silt discharge outlet;

The construction method includes the following steps:

Step S1, batch process the weir sill, first weir crest, second weir crest and weir mouth plate in the factory, and transport the weir sill, first weir crest, second weir crest and weir mouth plate to the construction site;

Step S2: Cut the weir sill according to the width and shape of the channel, and cut the middle area of the weir sill according to the designed size to obtain a drainage outlet; apply a layer of water-stop glue on the top and bottom of the weir sill respectively, and move the weir sill from top to bottom. The lower card is installed in the reserved slot, so that the weir sill is inserted into the lowest part of the internal space of the channel;

Step S3: Cut the first weir top according to the channel width, shape and weir type, apply a layer of water-stop glue on the top of the cut first weir top, and cut the first weir top from top to bottom along the reserved groove. Clamped on the weir sill;

Step S4: Cut the second weir crest according to the width, shape and weir mouth type of the channel, apply a layer of water-stop glue on the top of the cut second weir crest, and then snap the second weir crest onto the first weir crest superior;

Step S5: Cut the weir plate according to the length of the weir edge, and use bolts to fix the weir plate at the weir mouth;

Step S6: Apply water-stop glue at the junction between the main body of the water weir on the water-facing side and the reserved groove;

Step S7: Install an arc-shaped groove on the back surface of the weir sill, install a magnetic sealing connector along the circumference of the sediment discharge port, and install the connector on the upper part of the sediment discharge door in the arc-shaped groove so that the sediment discharge door is suspended. At the sand outlet;

Step S8, install photovoltaic towers, solar photovoltaic panels and integrated energy storage equipment near the channel, fix the magnetic controller on the photovoltaic tower, and install the integrated energy storage equipment inside the photovoltaic tower to provide the magnetic controller and electromagnetic Iron provides power.

The main body of the water weir of the present invention has a split structure, can be prefabricated in batches and assembled on site, has a short processing cycle, and can meet the rapid construction needs of farmland water conservancy projects; in addition, during on-site assembly, it can be cut on-site according to the cross section of the channel, which can meet different needs. The assembly requirements of the channel; the main body of the water weir adopts a split structure, and each board is light in weight. There is no need to use lifting equipment during installation, and the construction is simple and convenient, thus improving the construction efficiency;

In the present invention, a silt discharge door that can open and close by itself is installed on the weir sill. When silt is not being discharged, the silt discharge door is sealed by a magnetic sealing connector and blocked at the silt discharge outlet to avoid water leakage; when the silt discharge door is upstream, When the pressure of side sediment is greater than the magnetic attraction of the magnetic sealing connector, the sediment discharge door will be flushed open by the sediment and water, realizing timely drainage. That is to say, the invention can automatically desilt according to the amount of sedimentation, making channel maintenance simpler and greatly saving maintenance costs.

The invention installs solar photovoltaic panels and integrated energy storage equipment near the channel, and is equipped with photovoltaic power generation and signal interfaces to provide electric energy for the magnetic sealing connector and provide great convenience for realizing information management of the irrigation channel. In addition, the integrated energy storage equipment is installed inside the photovoltaic power tower, which is waterproof, safer and saves land.

Preferably, the weir plate is a trough-shaped structure, which includes a first side and a second side arranged parallel to each other, and further includes a horizontal side arranged horizontally at one end of the first side and connecting the horizontal side and the second side. A diagonal connecting edge where the sides are connected together, and the angle between the extension line of the horizontal side and the second side is an acute angle of not less than 45°. The weir plate in the present invention is a trough-shaped structure with one side open, which is light in weight and easy to transport; the weir plate with a trough structure is installed at the edge of the weir to effectively ensure the flow pattern.

Preferably, the thickness of the first weir crest is greater than the thickness of the weir sill, and the bottom surface of the first weir crest is provided with a splicing groove that matches the weir sill, and the first weir crest is clamped through the splicing groove. On the weir sill; the top of the first weir crest and the top of the second weir crest both have convex teeth with the same structure, the bottom of the second weir crest has a groove that matches the convex teeth, the first weir crest and The second weir crests, and the second weir crests and the second weir crests are snap-fitted together through convex teeth and grooves. The weir sill and the first weir crest, the first weir crest and the second weir crest, and the second weir crest and the second weir crest are connected through mortise and tenon joints, which are easy to install and efficient, and also reduce the weir sill. and the machining accuracy of the weir top.

More preferably, the connecting member is a connecting rod that rotates with the arc-shaped groove, and the upper part of the silt discharge door has an inclined plane connected to the connecting rod and a sealing surface extending vertically downward from the inclined plane. . The bending design of the silt discharge door ensures that the sealing surface is parallel to the silt discharge port, and the sealing surface closely fits the magnetic sealing connector, thereby realizing the sealing of the silt discharge port in the non-silt discharge state and avoiding water leakage.

More preferably, the magnetic sealing connector includes a mounting box, an electromagnet and a water-stop rubber strip. The mounting box is arranged along the circumferential direction of the silt discharge port, and the electromagnet is filled in the mounting box. , and the water-stop rubber strip is embedded in the electromagnet. During actual installation, the installation box has a rectangular ring structure, and the water-stop rubber strip and electromagnet are embedded in the installation box, achieving a tight fit between the sealing surface and the magnetic sealing connector to ensure waterproof performance. In actual operation, the magnetic suction controller presets the maximum magnetic force of the electromagnet. When the pressure exerted by the silt on the silt discharge door is greater than the preset maximum magnetic force, the silt discharge door is pushed open by the sand and silt discharge is realized; when When the pressure applied to the silt discharge door from the upstream side is less than the maximum adsorption magnetic force, the silt discharge door is blocked at the silt discharge port, realizing automatic silt discharge, making channel maintenance simpler and greatly saving maintenance costs.

Compared with the prior art, the present invention has the following advantages:

The main body of the water weir of the present invention has a split structure, which can be prefabricated in batches and assembled on site, has a short processing cycle, and can meet the rapid construction needs of farmland water conservancy projects; in addition, during on-site assembly, it can be cut on site according to the cross section of the channel, which can meet the needs of different channels. assembly requirements; according to the channel flow parameters, the weir mouth of the main body of the water weir can also be processed into different structures, such as triangular weir mouths with different angles, rectangular weir mouths or trapezoidal weir mouths with different slopes, etc.; the main body of the water weir adopts a split structure, and each block The board is light in weight and does not require the use of lifting equipment during installation, making construction simple and convenient, thereby improving construction efficiency.

The invention is equipped with a silt discharge door that can be opened and closed on its own on the weir sill, and can be automatically desilted according to the amount of sedimentation, making channel maintenance simpler and greatly saving maintenance costs. It is also equipped with photovoltaic power generation, energy storage and signal interfaces. , which can provide great convenience for the informatization of irrigation channels; the invention installs integrated energy storage equipment inside the photovoltaic power generation tower, which is waterproof, safer and saves land.

Description of the drawings

Figure 1 is a view of the completed construction state of the main body of the water weir of the present invention.

Figure 2 is a side view of the weir sill in the present invention (the top and bottom are coated with water-stop glue).

Figure 3 is a schematic diagram of the first weir crest in the present invention.

FIG. 4 is a side view of FIG. 3 .

Figure 5 is a schematic diagram of the second weir crest in the present invention.

FIG. 6 is a side view of FIG. 5 .

Figure 7 is a schematic diagram of the weir plate in the present invention.

Figure 8. Side view of Figure 7.

Figure 9 is a cross-sectional view of the weir sill and blocking structure in the present invention.

Figure 10 is an enlarged view of the weir sill in Figure 1 (the drainage gate is omitted).

Detailed ways

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. This embodiment is implemented based on the technical solution of the present invention and provides detailed implementation modes and specific operating processes. However, the protection scope of the present invention is not limited to the following. Described embodiment.

In the description of the present invention, unless otherwise explicitly stipulated and limited, the terms "connected" and "connected" that may appear should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

The invention provides a construction method for a thin-walled water measuring weir. Since the main body of the water weir is a split structure, it is small in size and light in weight, and is easy to transport without the need for lifting equipment. It can be cut and assembled on site according to the channel structure to meet the needs of different channels. requirements, improving assembly efficiency; it can also realize intelligent drainage and save maintenance costs.

Specifically, with reference to Figure 1, it can be seen that the thin-walled water weir of the present invention is arranged in the reserved tank 2 of the channel 1, and includes a water weir main body installed in the reserved tank 2, a silt discharge port provided on the water weir main body, and a seal. A blocking structure provided on the silt discharge outlet; among them, the main body of the water weir includes a weir sill 3 clamped in the reserved groove 2 from bottom to top and a weir top structure. The height of the weir sill 3 is generally 3 times the height of the main body of the water weir. /5; The weir crest structure includes a first weir crest 4.1 and a second weir crest 4.2 that are plugged in sequence from bottom to top; a weir opening with a triangular structure is provided in the middle of the weir crest structure (of course, the weir opening can also be rectangular according to actual needs mouth or trapezoidal mouth), etc.

The main body of the water weir is a split structure, which can be prefabricated in batches and assembled on site. The processing cycle is short and can meet the rapid construction needs of farmland water conservancy projects. During on-site assembly, it can be cut on site according to the cross section of channel 1, which can meet the assembly needs of different channels 1. ; Since the weir crest structure and weir sill 3 are split structures and are light in weight, no lifting equipment is required during installation. The construction is simple and convenient, and the construction efficiency is improved.

Based on Figure 2-4, it can be seen that the weir sill 3 is a rectangular structure, and its height is generally 3/5 of the height of the weir body. During installation, apply water-stop glue A on the top and bottom of the weir sill 3 to ensure that the bottom of the weir sill 3 and the preset The sealing and waterproof performance of the retaining groove 2; the thickness of the first weir crest 4.1 is slightly larger than the thickness of the weir sill 3, and a splicing groove B consistent with its length direction is provided at the bottom of the first weir crest 4.1. The width of the splicing groove B is the same as that of the weir sill. 3 have the same thickness, so that the bottom of the first weir crest 4.1 is clamped on the top of the weir sill 3, and the top of the weir sill 3 is also coated with water-stop glue to ensure a reliable connection between the weir sill 3 and the first weir crest 4.1.

During actual processing, the first weir crest 4.1 and the second weir crest 4.2, and the second weir crest 4.2 and the second weir crest 4.2 are all connected through mortise and tenon structures, thereby realizing rapid assembly of the water weir main body and improving Assembly efficiency. Specifically, as shown in Figures 1 and 4-6, the top of the first crest 4.1 and the top of the second crest 4.2 are both provided with convex teeth C that are consistent with their length directions, and the bottom of the second crest 4.2 has a convex tooth C that is consistent with its length. Grooves D in the same direction. During assembly, match and insert the groove D at the bottom of the second weir crest 4.2 with the convex tooth C of the first weir crest 4.1 to achieve quick plug-in connection between the first weir crest 4.1 and the second weir crest 4.2.

During assembly, water-stop glue A can be applied in groove D to ensure the waterproof performance of each connection seam. The heights of the first weir crest 4.1 and the second weir crest 4.2 are preferably the same. The number of the second weir crest 4.2 can be flexibly selected according to the design height of the weir crest, or the uppermost second weir crest 4.2 can be cut off to a certain height. For details, see figure 1.

Combining Figures 1 and 7-8, it can be seen that the weir mouth edge is fixedly connected with a weir mouth plate 5 through bolts, which has a shaping effect. The weir plate 5 includes a first side 5.1 and a second side 5.2 arranged in parallel, a horizontal side 5.3 arranged horizontally at one end of the first side 5.1 and a slope connecting the horizontal side 5.3 and the second side 5.2 together. The connecting edge 5.4 makes the weir plate 5 have a groove structure with one side open, which is light in weight and easy to install. During actual processing, the angle α between the extension line of the horizontal side 5.3 and the second side 5.2 is ≥45° to further ensure the water flow shape.

Combining Figures 1 and 9-10, it can be seen that the silt discharge port F is opened in the middle area of the weir sill 3. An arc-shaped groove 6 is transversely provided on the weir sill 3 above the silt discharge port F. The arc-shaped groove 6 opens upward and is fixed on The back surface of the water weir main body; the blocking structure includes a connecting piece that rotates with the arc-shaped groove 6 and a silt discharge door 8 fixed on the connecting piece. The connecting piece is a connecting rod 7 that rotates with the arc-shaped groove 6 (the cross-section is Cylindrical structure), ensuring that it can rotate in the arc-shaped groove 6, further ensuring the opening and closing of the silt discharge door 8;

A magnetic sealing connector is installed on the weir sill 3 along the circumferential direction of the silt discharge port F. The magnetic sealing connector includes a mounting box 9.1, an electromagnet 9.2 and a water-stop strip 9.3. The installation box 9.1 is installed along the silt discharge port F. Set in the circumferential direction, the electromagnet 9.2 is filled and arranged in the installation box 9.1 with two circles, and the water-stop rubber strip 9.3 is embedded in the two circles of the electromagnet 9.2, effectively ensuring the sealed connection between the silt discharge door 8 and the weir sill 3;

During actual installation, the thin-walled water measuring weir of the present invention also includes a magnetic controller 9.4 for adjusting the magnetic force of the electromagnet 9.2. The magnetic suction controller presets the maximum adsorption magnetic force of the electromagnet 9.2 (specifically, it can be set according to the sediment pressure in front of the weir). When the pressure exerted by the sediment on the sediment discharge door 8 is greater than the preset magnetic force, the sediment discharge door 8 is blocked by the sediment. When the pressure applied to the silt discharge door 8 from the upstream side is less than the preset magnetic force, the silt discharge door 8 is blocked at the silt discharge opening, realizing automatic silt discharge and saving maintenance costs.

In actual projects, photovoltaic towers and solar photovoltaic panels can be installed near the water weir installation location, and the energy storage device can be installed inside the photovoltaic tower to provide power for the magnetic controller 9.4 and the electromagnet 9.2.

The construction method of the thin-walled water measuring weir according to the present invention includes the following contents:

Step S1, batch process the weir sill 3, the first and second weir crests 4.1 and 4.2 and the weir opening plate 5 in the factory, and transport the weir sill 3, the first and second weir crests 4.1 and 4.2 and the weir opening plate 5 to construction on site;

Step S2, cut the weir sill according to the width and shape of the channel, and cut the middle area of the weir sill according to the designed size to obtain a drainage outlet; apply a layer of water-stop glue A on the top and bottom of the weir sill 3 to seal the weir. The sill 3 is clamped in the reserved groove 2 from top to bottom, so that the weir sill 3 is located at the lowest part of the internal space of the channel;

Step S3: Cut the first weir crest 4.1 according to the width, shape and weir mouth type of the channel 1, apply a layer of water-stop glue on the top of the cut first weir crest 4.1, and then cut the first weir crest 4.1 along the predetermined Leave the groove 2 to clamp the first weir crest 4.1 on the weir sill 3 from top to bottom;

Step S4, cut the second weir crest 4.2 according to the width, shape and weir mouth type of the channel 1, and clamp the second weir crest 4.2 on the first weir crest 4.1 from top to bottom along the reserved groove 2;

Step S5, cut the weir plate according to the length of the weir, and use bolts to fix the weir plate 5 at the weir;

Step S6, apply water-stop glue at the junction between the main body of the water weir on the water-facing side and the reserved groove 2;

Step S7, install the arc-shaped groove 6 on the back surface of the weir sill 3, install the magnetic sealing connector along the circumferential direction of the sand discharge port F, and install the connector of the sediment discharge door 8 in the arc-shaped groove 6, so that The silt discharge door is hung at the sand discharge outlet;

Step S8, install the photovoltaic tower 10, solar photovoltaic panels 11 and integrated energy storage equipment 12 near the channel, fix the magnetic controller 9.4 on the photovoltaic tower 10, and install the integrated energy storage equipment 12 inside the photovoltaic tower 10. Provides power to the magnetic controller 9.4 and the electromagnet.

The weir sill 3, the first weir crest 4.1, and the second weir crest 4.2 of the present invention can be flexibly cut according to the cross-sectional shape of the channel 1 (the cross-sectional structure of the channel is closely related to the channel flow rate. According to the channel flow design requirements, the channel cross-sectional shape can be U-shaped, rectangular or trapezoidal, etc.), which can meet the assembly needs of different channels and has high versatility; during assembly, due to the light weight of the weir sill 3 and the weir top, no lifting equipment is required, and the processing and installation can be completed manually. The operation is simple, the construction is convenient, and the construction cost is reduced.

Finally, it should be emphasized that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it It is still possible to modify the technical solutions described in the foregoing embodiments without any creative effort, or to make equivalent substitutions for some of the technical features. Therefore, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims (5)

1. A construction method of a thin-walled water measuring weir. The construction method is to install the thin-walled water measuring weir in a reserved groove of a channel. It is characterized in that: the thin-walled water measuring weir includes a water weir main body and is arranged on the water weir main body. The silt discharge port on the silt discharge port, and the sealing structure provided on the silt discharge port; The main body of the water weir is an assembled structure, including a weir sill and a weir top structure that are clamped in the reserved groove from bottom to top. The height of the weir sill is ≥ 3/5 of the height of the main body of the water weir; The weir crest structure includes a first weir crest and a second weir crest that are connected in sequence from bottom to top, and there is at least one second weir crest; A weir opening with a triangular, rectangular or trapezoidal structure is provided in the middle of the weir crest structure, and a weir opening plate is provided at each edge of the weir opening, and the weir opening plate is fixedly connected to the weir crest structure through bolts; An arc-shaped groove is provided on the weir sill located at the upper edge of the silt discharge outlet, and the arc-shaped groove is provided on the back surface of the water weir main body; the blocking structure includes a rotating structure with the arc-shaped groove A matching connector and a silt discharge door fixed on the connector; a magnetic sealing connector arranged along the circumferential direction of the silt discharge port is installed on the weir sill, and the magnetic sealing connector connects the The silt discharge door is adsorbed at the silt discharge outlet; The construction method includes the following steps: Step S1, batch process the weir sill, first weir crest, second weir crest and weir mouth plate in the factory, and transport the weir sill, first weir crest, second weir crest and weir mouth plate to the construction site; Step S2: Cut the weir sill according to the width and shape of the channel, and cut the middle area of the weir sill according to the designed size to obtain a drainage outlet; apply a layer of water-stop glue on the top and bottom of the weir sill respectively, and move the weir sill from top to bottom. The lower card is installed in the reserved slot, so that the weir sill is inserted into the lowest part of the internal space of the channel; Step S3: Cut the first weir top according to the channel width, shape and weir type, apply a layer of water-stop glue on the top of the cut first weir top, and cut the first weir top from top to bottom along the reserved groove. Clamped on the weir sill; Step S4: Cut the second weir top according to the channel width, shape and weir mouth type, and clamp the second weir top on the first weir top; Step S5: Cut the weir plate according to the length of the weir edge, and use bolts to fix the weir plate at the weir mouth; Step S6: Apply water-stop glue at the junction between the main body of the water weir on the water-facing side and the reserved groove; Step S7: Install an arc-shaped groove on the back surface of the weir sill, install a magnetic sealing connector along the circumference of the sediment discharge port, and install the connector on the upper part of the sediment discharge door in the arc-shaped groove so that the sediment discharge door is suspended. At the sand outlet; Step S8: Install photovoltaic towers, solar photovoltaic panels and integrated energy storage equipment near the channel, fix the magnetic controller on the photovoltaic tower, and install the integrated energy storage equipment inside the photovoltaic tower. 2. The construction method of thin-walled water measuring weir according to claim 1, characterized in that: the weir mouth plate is a channel structure, which includes a first side and a second side arranged in parallel and opposite, and further includes a horizontally arranged The horizontal side at one end of the first side and the oblique connecting side connecting the horizontal side and the second side, and the angle between the extension line of the horizontal side and the second side is an acute angle of not less than 45°. 3. The construction method of thin-walled water measuring weir according to claim 1, characterized in that: the thickness of the first weir crest is greater than the thickness of the weir sill, and the bottom surface of the first weir crest is provided with a weir sill. Matching splicing grooves, through which the first weir crest is clamped on the weir sill; The top of the first weir crest and the top of the second weir crest both have convex teeth with the same structure, and the bottom of the second weir crest has a groove that matches the convex teeth. The second weir crest and the second weir crest are snap-fitted together through convex teeth and grooves. 4. The construction method of thin-walled water measuring weir according to claim 1, characterized in that: the connecting piece is a connecting rod that rotates with the arc-shaped groove, and the upper part of the silt discharge door has a connecting rod that is connected to the connecting rod. The sealing surface is connected to the inclined surface and extends vertically downward from the inclined surface. 5. The construction method of thin-walled water measuring weir according to claim 1, characterized in that: the magnetic sealing connector includes a mounting box, an electromagnet and a water-stop tape, and the mounting box is installed along the silt discharge opening. Arranged in the circumferential direction, the electromagnet is filled and arranged in the installation box, and the water-stop rubber strip is embedded in the electromagnet.