CN103306289B - Foundation pit piled anchor dado concrete anchor cable top beam structure and construction method thereof - Google Patents
Foundation pit piled anchor dado concrete anchor cable top beam structure and construction method thereof Download PDFInfo
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- CN103306289B CN103306289B CN201310273491.2A CN201310273491A CN103306289B CN 103306289 B CN103306289 B CN 103306289B CN 201310273491 A CN201310273491 A CN 201310273491A CN 103306289 B CN103306289 B CN 103306289B
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- 238000010276 construction Methods 0.000 title claims abstract description 44
- 239000004567 concrete Substances 0.000 title claims abstract description 36
- 238000010168 coupling process Methods 0.000 claims abstract description 24
- 238000005859 coupling reaction Methods 0.000 claims abstract description 24
- 230000008878 coupling Effects 0.000 claims abstract description 23
- 239000002689 soil Substances 0.000 claims abstract description 12
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 9
- 230000002787 reinforcement Effects 0.000 claims abstract description 4
- 210000000481 breast Anatomy 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 238000009412 basement excavation Methods 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000004570 mortar (masonry) Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000000151 deposition Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000007569 slipcasting Methods 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 2
- 210000003205 muscle Anatomy 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to the field of adjacent subsurface structure foundation pits construction, particularly to a foundation pit piled anchor dado concrete anchor cable top beam structure and a construction method thereof. The foundation pit piled anchor dado concrete anchor cable top beam structure is characterized by comprising slope protection piles, top beams, anchor cables and coupling beams and is an integral reinforced concrete structure comprising two rows of slope protection piles, wherein the two rows of slope protection piles arranged at intervals are arranged on two the side walls of two foundation pits respectively; a pre-stressed anchor is arranged between every two adjacent slope protection piles; waist rails used for reinforcement are arranged between the two rows of slope protection piles; pile heads at the top of each row of slope protection piles are connected together through the top beams made of reinforced concretes; the top beams on the slope protection piles in the foundation pits are connected through the coupling beams; the anchor cables are arranged in the coupling beams; the two ends of the anchor cables are connected with the top beams through base plates and anchorage devices. Compared with the prior art, the foundation pit piled anchor dado concrete anchor cable top beam structure has the following advantages: as the two rows of slope protection piles form a steady and firm slope protection system through the anchor cables, the safety of a soil body between two structures is ensured, the construction working plane and transport corridor are increased, the excavated volume and backfill volume are reduced, the construction period is greatly shortened, and the cost is reduced.
Description
Technical field
The present invention relates to adjacent underground structure foundation pit construction field, particularly relate to a kind of pit pile anchor breast wall concrete anchor cable hat girder construction and construction method thereof.
Background technology
At present in the civil engineering of underground structure, time between adjacent 20 ~ 30 meters of two underground structures, need to process the earthwork between two underground structure foundation ditches, wherein a kind of method is all excavated by soil between structure, complete Deng Underground Construction, backfilled, its defect is the reduction of operation side again, adds amount of excavation and vertical transport cost.
Another kind method adopts pile anchor breast wall structure, inter-pile soil between lagging pile does some roads prestressing force shank, together with by horizontal waist rail prestressing force shank being anchored at slope protection pile, its defect is: when part is as vehicle transport and placing of material ground between using structure, be difficult to ensure side slope safety, area between structure cannot be effectively utilized.
Summary of the invention
The object of this invention is to provide a kind of pit pile anchor breast wall concrete anchor cable hat girder construction and construction method thereof, do not excavate the earthwork between two underground structures, and the safety ensureing as placing of material place and vehicle transport passage, increase operation side and transport of materials facility, reduce the earthwork and dig freight volume and construction sequence, shorten the construction period.
For achieving the above object, the present invention adopts following technical scheme to realize:
Pit pile anchor breast wall concrete anchor cable hat girder construction, comprise slope protection pile, Guan Liang, anchor cable and coupling beam, this is the integral reinforced concrete structure formed by two row's slope protection pile, the spaced slope protection pile of a row is respectively provided with at the adjacent wall of two foundation ditches, prestressed anchor is provided with between the stake of adjacent slope protection pile, the waist rail reinforced is provided with between the stake of often arranging slope protection pile, the pile crown often arranging slope protection pile top is linked into an integrated entity by the Guan Liang of steel concrete, Guan Liang in two foundation pit slope protection stakes is connected by coupling beam, anchor cable is established in coupling beam, anchor cable two ends are connected with Guan Liang by backing plate beam ground tackle of coming of age, reinforced mesh is distributed with between slope protection pile.
Be provided with in described reinforced mesh by the cross-coupled horizontal bar of rinforcement bar and vertical muscle.
Described prestressed anchor is the one in prestress wire, solid anchor pole, hollow expansion type rock bolt or hollow grouting anchor.
Described slope protection pile is reinforced concrete revetment pile, immersed tube bored slope protection pile, the one stirred in slope protection pile, borehole slope protection pile or mechanical hole building slope protection pile.
Described waist rail can be steel wale, also can be reinforced concrete waist rail.
The construction method of described pit pile anchor breast wall concrete anchor cable hat girder construction, its Specific construction step is:
1) at predetermined two foundation pit side-wall inner sides, respective interval construction one row concrete revetment pile;
2) after slope protection pile intensity reaches 75% requirement, dig out the earthwork of slope protection pile pile crown part in time, 100 ~ 150mm to coupling beam elevation of bottom is dug in the earthwork;
3) water C10 concrete cushion, abolish pile crown concrete;
4) hat beam center line is ejected, i.e. slope protection pile center line;
5) reinforcing bar of fabrication and installation Guan Liang;
6) pre-buried anchor cable steel sleeve, backing plate and PVC sleeve pipe;
7) model sheetinstallat is reinforced, cast Guan Liang and coupling beam concrete maintenance;
8) after hat beam strength reaches 80%, install hat beam anchor cable and start pit earthwork excavation, excavation is to the position of lagging pile anchor pole;
9) between slope protection pile, carry out prestressed anchor punching construction, smear sliding agent, and put PVC sleeve pipe for one section that before cast, prestressed anchor is run through waist rail, then carry out prestressed anchor, mortar depositing construction, slip casting is to sleeve pipe place;
10) cleaning of the inter-pile soil body at prestressed anchor position is rejected clean, the inter-pile soil body of the pile body of both sides slope protection pile and rejecting is cleaned out;
11) by beyond prestressed anchor grouting port to stake one section be coated with sliding agent, by cover have the prestressed anchor two ends of sleeve pipe to be inserted in anchor slab, within the scope of the inner side 100mm of anchor slab permanent position joint face outside slope protection pile;
12) assembling reinforcement mesh sheet outside anchor slab, fixing spilled water hole, sprayed mortar;
13) waist rail is installed, ground tackle between stake is installed, stretch-draw prestressing force anchor pole;
14), after completing waist rail, next step foundation ditch digging can be carried out.
Described hat beam minimum dimension is 1.2m × 0.7m, and hat beam concrete strength is not less than C30.
In described step 5), pile crown reinforcing bar stretches into Guan Liang and is no less than 650mm.
Described step 6) stream line steel sleeve diameter is 90 ~ 100mm, and be plain concrete between two hat beams, pre-buried PVC plastic pipe runs through coupling beam.
Compared with prior art, the invention has the beneficial effects as follows: 1) adopt hat beam anchor cable structure effectively to be reinforced by soil between two underground structures, firm bank protection system is formed by between two row's slope protection pile, ensure that soil body safety between structure, is cheap, safe and reliable, the simple and convenient easy hat beam construction technology of a kind of disposal cost.2) between two Adjacent Pits, the soil body can be used for operation side heap putting material and transport channel, decreases excavation of foundation pit amount and backfill amount, substantially reduces the construction period, simplify construction sequence, reduce cost, accelerate programming.
Accompanying drawing explanation
Fig. 1 is the plan view from above of the embodiment of the present invention;
Fig. 2 is along A-A line sectional view in Fig. 1;
Fig. 3 is along B-B line sectional view in Fig. 2;
Fig. 4 is the structural representation of reinforced mesh in the embodiment of the present invention;
Fig. 5 is prestressed anchor anchor structure schematic diagram between slope protection pile of the present invention;
Fig. 6 is the position relationship structural representation of reinforced mesh and anchor slab in the embodiment of the present invention;
Fig. 7 is the axial sectional view of Fig. 6;
Fig. 8 is Guan Liang in the embodiment of the present invention, slope protection pile and waist rail position elevational schematic view.
In figure: 1-is preced with beam 2-slope protection pile 3-coupling beam 4-backing plate 5-hat beam ground tackle 6-anchor cable 7-PVC sleeve pipe 8-support 9-prestressed anchor 10-anchor slab 11-rinforcement bar 12-horizontal bar 13-and indulges ground tackle 15-stake reinforcing bar 16-steel sleeve 17-waist rail between muscle 14-stake
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention one step is illustrated:
See Fig. 1, Fig. 2, Fig. 3, it is pit pile anchor breast wall concrete anchor cable of the present invention hat girder construction embodiment plan view from above, comprise hat beam 1, slope protection pile 2, anchor cable 6 and coupling beam 3, this is the integral reinforced concrete structure formed by two row's slope protection pile, the spaced slope protection pile 2 of a row is respectively provided with at two foundation pit side-walls, prestressed anchor 9 is provided with between the stake of adjacent slope protection pile 2, often arrange slope protection pile 2 stake between be provided with reinforce waist rail 17, the pile crown often arranging slope protection pile 2 top is linked into an integrated entity by the hat beam 1 of steel concrete, hat beam 1 in two foundation pit slope protection stakes is connected by coupling beam 3, anchor cable 6 is established in coupling beam 3, anchor cable 6 two ends by backing plate 4 come of age beam ground tackle 5 with hat beam 1 be connected, reinforced mesh is distributed with between slope protection pile 2.
See Fig. 4, be provided with by the cross-coupled horizontal bar of rinforcement bar 11 12 and vertical muscle 13 in reinforced mesh, vertical muscle 13 welds with stake reinforcing bar 15.
In embodiment, prestressed anchor is the one in prestress wire, solid anchor pole, hollow expansion type rock bolt or hollow grouting anchor.Slope protection pile is reinforced concrete revetment pile, immersed tube bored slope protection pile, the one stirred in slope protection pile, borehole slope protection pile or mechanical hole building slope protection pile.Waist rail 17 can be steel wale, also can be reinforced concrete waist rail.
The construction method of pit pile anchor breast wall concrete anchor cable hat girder construction of the present invention, its Specific construction step is:
1) correspondence position inside predetermined two foundation pit side-walls, respective interval construction one row concrete revetment pile 2;
2) after slope protection pile 2 intensity reaches 75% requirement, dig out the earthwork of slope protection pile 2 pile crown part in time, 100 ~ 150mm to coupling beam 3 elevation of bottom is dug in the earthwork;
3) water C10 concrete cushion, abolish pile crown concrete;
4) eject the center line of hat beam 1, i.e. slope protection pile center line, eject coupling beam center line;
5) see Fig. 5, the reinforcing bar of fabrication and installation hat beam 1, stake reinforcing bar 15 is extended down in hat beam 1;
6) the PVC sleeve pipe 7 in the steel sleeve 16 of pre-buried anchor cable 6, backing plate 4 and coupling beam, establish PVC sleeve pipe 7 in steel sleeve 16, steel sleeve 16 is carried on a shoulder pole on support 8, and the bottom surface of support 8 bottom surface and coupling beam 3 is contour;
7) model sheetinstallat is reinforced, cast hat beam 1 and coupling beam 3 concrete maintenance;
8) after hat beam 1 intensity reaches 80%, install anchor cable 6 and start pit earthwork excavation, excavation is to the position of anchor pole 9;
9) between slope protection pile 2, carry out prestressed anchor 9 to punch construction, pour into a mould and front a section of prestressed anchor 9 being run through waist rail 17 is smeared sliding agent, then prestressed anchor pole 9, mortar depositing construction, slip casting is to anchor slab 10 place;
10) cleaning of the inter-pile soil body at prestressed anchor 9 position is rejected clean, the inter-pile soil body of the pile body of both sides slope protection pile 2 and rejecting is cleaned out;
11) see Fig. 6, by beyond prestressed anchor 9 grouting port to stake one section be coated with sliding agent, by cover have prestressed anchor 9 two ends of sleeve pipe to be inserted in anchor slab 10, within the scope of the inner side 100mm of anchor slab 10 permanent position joint face outside slope protection pile;
12) see Fig. 7, the horizontal bar 12 of assembling reinforcement mesh sheet and vertical muscle 13 outside anchor slab 10, fixing spilled water hole, sprayed mortar, between stake, ground tackle 14 is positioned at the end of prestressed anchor 9;
13) see Fig. 8, install waist rail 17, install ground tackle between stake, stretch-draw prestressing force anchor pole, waist rail 17 is used for reinforcing the slope protection pile 2 below hat beam 1;
14), after completing waist rail, next step foundation ditch digging can be carried out.
Claims (4)
1. the construction method of a pit pile anchor breast wall concrete anchor cable hat girder construction, described pit pile anchor breast wall concrete anchor cable hat girder construction, comprise slope protection pile, Guan Liang, anchor cable and coupling beam, this is the integral reinforced concrete structure formed by two row's slope protection pile, the spaced slope protection pile of a row is respectively provided with at the adjacent wall of two foundation ditches, prestressed anchor is provided with between the stake of adjacent slope protection pile, the waist rail reinforced is provided with between the stake of often arranging slope protection pile, the pile crown often arranging slope protection pile top is linked into an integrated entity by the Guan Liang of steel concrete, Guan Liang in two foundation pit slope protection stakes is connected by coupling beam, anchor cable is established in coupling beam, anchor cable two ends are connected with Guan Liang by backing plate beam ground tackle of coming of age, reinforced mesh is distributed with between slope protection pile, it is characterized in that, the construction method of described pit pile anchor breast wall concrete anchor cable hat girder construction, Specific construction step is as follows:
1) at predetermined two foundation pit side-wall inner sides, respective interval construction one row concrete revetment pile;
2) after slope protection pile intensity reaches 75% requirement, dig out the earthwork of slope protection pile pile crown part in time, 100 ~ 150mm to coupling beam elevation of bottom is dug in the earthwork;
3) water C10 concrete cushion, abolish pile crown concrete;
4) hat beam center line is ejected, i.e. slope protection pile center line;
5) reinforcing bar of fabrication and installation Guan Liang;
6) pre-buried anchor cable steel sleeve, backing plate and PVC sleeve pipe;
7) model sheetinstallat is reinforced, cast Guan Liang and coupling beam concrete maintenance;
8) after hat beam strength reaches 80%, install hat beam anchor cable and start pit earthwork excavation, excavation is to the position of lagging pile anchor pole;
9) between slope protection pile, carry out prestressed anchor punching construction, smear sliding agent, and put PVC sleeve pipe for one section that before cast, prestressed anchor is run through waist rail, then carry out prestressed anchor, mortar depositing construction, slip casting is to sleeve pipe place;
10) cleaning of the inter-pile soil body at prestressed anchor position is rejected clean, the inter-pile soil body of the pile body of both sides slope protection pile and rejecting is cleaned out;
11) by beyond prestressed anchor grouting port to stake one section be coated with sliding agent, by cover have the prestressed anchor two ends of sleeve pipe to be inserted in anchor slab, within the scope of the inner side 100mm of anchor slab permanent position joint face outside slope protection pile;
12) assembling reinforcement mesh sheet outside anchor slab, fixing spilled water hole, sprayed mortar;
13) waist rail is installed, ground tackle between stake is installed, stretch-draw prestressing force anchor pole;
14), after completing waist rail, next step foundation ditch digging can be carried out.
2. pit pile anchor breast wall concrete anchor cable hat beam structure construction method according to claim 1, it is characterized in that, described hat beam minimum dimension is 1.2m × 0.7m, and hat beam concrete strength is not less than C30.
3. pit pile anchor breast wall concrete anchor cable hat beam structure construction method according to claim 1, is characterized in that, described step 5) in, pile crown reinforcing bar stretches into Guan Liang and is no less than 650mm.
4. pit pile anchor breast wall concrete anchor cable according to claim 1 hat beam structure construction method, is characterized in that, described step 6) stream line steel sleeve diameter is 90 ~ 100mm, be plain concrete between two hat beams, pre-buried PVC plastic pipe runs through coupling beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310273491.2A CN103306289B (en) | 2013-06-28 | 2013-06-28 | Foundation pit piled anchor dado concrete anchor cable top beam structure and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310273491.2A CN103306289B (en) | 2013-06-28 | 2013-06-28 | Foundation pit piled anchor dado concrete anchor cable top beam structure and construction method thereof |
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| CN103306289A CN103306289A (en) | 2013-09-18 |
| CN103306289B true CN103306289B (en) | 2015-04-22 |
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| CN114164837B (en) * | 2021-07-27 | 2024-07-09 | 北京市机械施工集团有限公司 | Reinforcing apparatus of stock steel waist rail, backing plate |
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