CN103031841A - Post-tensioned prestressing rectangular hollow foundation pit support pile - Google Patents
Post-tensioned prestressing rectangular hollow foundation pit support pile Download PDFInfo
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- CN103031841A CN103031841A CN2012105909859A CN201210590985A CN103031841A CN 103031841 A CN103031841 A CN 103031841A CN 2012105909859 A CN2012105909859 A CN 2012105909859A CN 201210590985 A CN201210590985 A CN 201210590985A CN 103031841 A CN103031841 A CN 103031841A
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Abstract
The invention relates to a post-tensioned prestressing rectangular hollow foundation pit support pile. The support pile comprises a rectangular stabilizing ring rib, a rectangular steel reinforcement framework, concrete, a bottom pressure bearing plate and a locking anchorage device, wherein reinforcing steel bars are respectively arranged on a rectangular steel reinforcement framework inner side which is close to a foundation pit and the two adjacent sides of the rectangular steel reinforcement framework, an isolation pipe is arranged outside the foundation pit, a steel strand or a high tensile reinforcing steel bar is arranged in the isolation pipe, a reinforcement stirrup is used to fix the reinforcing steel bar and the isolation pipe to form a rectangular framework structure, the pressure bearing plate is arranged on the bottom end of the pile of the isolation pipe, the pile bottom pressure bearing plate is fixedly connected with one end of the steel strand or the high tensile reinforcing steel bar, the steel strand or the high tensile reinforcing steel bar penetrates through the isolation pipe, the locking anchorage device is used to lock a pile top, meanwhile, a grouting hole and a vent hole are formed in the locking anchorage device on the pile top, and the rectangular stabilizing ring rib is arranged in a rectangular hollow support pile. By the pile, a function in supporting the foundation pit is enhanced, the side deformation of a supporting structure and the adverse influence of the foundation pit to the periphery environment are reduced, the use amounts of the reinforcing steel bars and the concrete are reduced, and the building cost is saved.
Description
Affiliated technical field
The present invention relates to a kind of building foundation pit reinforcing soldier pile, specifically a kind of post-tensioned prestressing rectangle hollow foundation pit supporting pile.
Background technology
Along with the day of urban land is becoming tight, the construction of the underground space also is trend of the times, and deep foundation pit support just becomes an important step of Underground Space Excavation.In the realm of building construction, be widely used circle or rectangle ordinary reinforced concrete castinplace pile as foundation pit supporting construction.In the foundation ditch during excavation of the cubic metre of earth and stone, the side direction slippage in the foundation ditch of the foundation ditch outside soil body, pile body can form larger moment of flexure near the foundation ditch outside after stressed, the distortion of generation tension, can cause answering the excessive even unstability of soldier pile distortion when serious, foundation failure brings potential safety hazard to building operations.In order to improve the intensity of foundation pit supporting construction system, now adopt increases amount of reinforcement, increases the stake footpath, reduces the measure such as pile spacing more, and these measures without exception all increased reinforcing bar and concrete consumption, be unfavorable for the reduction of erection time and reduce cost, and can not effectively retrain supporting and protection structure and foundation pit deformation.
Summary of the invention
The problem that exists in order to solve the existing building foundation pit supporting pile, the invention provides a kind of post-tensioned prestressing rectangle hollow foundation pit supporting pile, this post-tensioned prestressing rectangle hollow foundation pit supporting pile not only has the good effect of going along with sb. to guard him, and has a stronger non-deformability, can effectively reduce lateral deformation, guarantee building foundation pit safety, reduce building costs.
The technical solution adopted for the present invention to solve the technical problems is: it is by concrete, the concrete pile that rectangle cage of reinforcement and rectangle stabilizing ring rib consist of, the rectangle cage of reinforcement includes reinforcing bar and stirrup, reinforcing bar is fixed by stirrup, the rectangle cage of reinforcement is reinforcing bar near foundation ditch inboard and adjacent both sides thereof, the close foundation ditch outside is for being provided with the isolated tube of steel strand or high tensile reinforcement, and be respectively equipped with a stake top locking ground tackle and a stake end bearing plate at the two ends of steel strand or high tensile reinforcement, steel strand or high tensile reinforcement bottom are fixedly connected with stake end bearing plate, steel strand or high tensile reinforcement top lock by stake top locking ground tackle, be provided with grout hole and steam vent at stake top locking ground tackle, construction sequence is carried out in the following order: 1., with reinforcing bar, isolated tube, steel strand or high tensile reinforcement, stake end pressure-bearing fixed head is seated in the default rectangle foundation pit soldier pile hole, then one by one reinforcing bar and isolated tube are carried out colligation formation rectangle cage of reinforcement with stirrup, and pressure-bearing fixed head at the bottom of the stake is placed on isolated tube below, be fixed with the steel strand that from isolated tube, pass or high tensile reinforcement and be connected, during colligation with a side of isolated tube and steel strand or high tensile reinforcement to the foundation ditch arranged outside; 2., the hollow pile inner side template is installed, and after effectively fixing, carry out concreting, form rectangle hollow foundation pit supporting pile pile body; 3., treat rectangle hollow foundation pit supporting pile pile strength reach designing requirement 75% the time remove inner side template, the ground tackle of stake heading tape grout hole is installed; 4., build rectangle stabilizing ring rib, and fully vibrate make its inner fill closely knit; 5., steel strand or high tensile reinforcement applied prestressing force and lock a ground tackle with the stake top lock, cut off unnecessary steel strand or high tensile reinforcement; 6., from the grout hole of stake top locking ground tackle to isolated tube in the cement injection mortar, until fill up cement mortar in the isolated tube.Steel strand or high tensile reinforcement are applied prestressing force, can make foundation pit supporting pile that compressive deformation occurs first, to resist the active force of outside soil layer in the Excavation Process, effectively reduce the tension total deformation of support system, under the same diameter prerequisite, improve intensity and the non-deformability of foundation pit supporting pile, reduced reinforcing bar, concrete use amount.
The invention has the beneficial effects as follows: can not only play the good effect of going along with sb. to guard him to foundation ditch, and can effectively reduce the lateral deformation that foundation pit supporting pile in use produces, reduce conventional soldier pile foundation ditch surrounding ground and be out of shape the unfavorable deformation effect that reaches environment, guarantee building foundation pit safety, and under identical anti-bending bearing capacity design condition, can reduce reinforcing bar and concrete consumption, be conducive to the reduction of erection time and reduce building costs, product structure is simple, and cost is low, easy construction is easily promoted the use of.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is the cross-sectional structure schematic diagram of pile body among the present invention.
Fig. 2 is the cross-sectional view of pile body among the present invention.
Fig. 3 is the cross-sectional view of the invention process state.
The perspective view of Fig. 4 king-pile of the present invention top locking ground tackle.
Fig. 5 is the perspective view of rectangle stabilizing ring rib among the present invention.
Code description among the figure: 1-concrete; The 2-reinforcing bar; The 3-stirrup; 4-rectangle stabilizing ring rib; The 5-isolated tube; 6-steel strand or high tensile reinforcement; Bearing plate at the bottom of the 7-stake; 8-stake top locking ground tackle; The 9-conical bore; The 10-grout hole; The 11-steam vent; At the bottom of the 12-foundation ditch; Soil layer district, the 13-foundation ditch outside;
F-active force.
The specific embodiment
As shown in Figure 1, when adopting post-tensioned prestressing rectangle foundation pit soldier pile of the present invention, be set to reinforcing bar (2) near foundation ditch inboard and adjacent both sides thereof in the cage of reinforcement, and will be isolated tube (5) near the foundation ditch arranged outside, and with stirrup (3) reinforcing bar and isolated tube be fixed as the rectangular framework structure.Shown in Fig. 2, Fig. 3, be hollow in the middle of the isolated tube (5), can pass for steel strand or high tensile reinforcement (6), steel strand or high tensile reinforcement bottom are fixedly connected with stake end locking ground tackle (7), and be provided with locking ground tackle (8) at the other end of steel strand or high tensile reinforcement, as shown in Figure 4, the conical bore (9) that is provided with grout hole (10), steam vent (11) and can supplies steel strand or high tensile reinforcement to pass at stake top locking ground tackle (8).In practice, can adopt the cast in situs mode, reinforcing bar, isolated tube, steel strand or high tensile reinforcement, stake end pressure-bearing fixed head are seated in the default rectangle soldier pile hole, then one by one reinforcing bar and isolated tube are carried out colligation with stirrup, and pressure-bearing fixed head at the bottom of the stake is placed on isolated tube below, it be fixed with the steel strand that pass from isolated tube or high tensile reinforcement be connected, during colligation with a side of isolated tube and steel strand or high tensile reinforcement to the foundation ditch arranged outside.According to designing requirement hollow inner side template is installed, then carries out concreting.When concrete strength of pile meets design requirement, and be not less than the design strength grade 75% after, remove internal mold, carry out building of rectangle stabilizing ring rib, to fully vibrate simultaneously, with its inner fill closely knit.Then steel strand or high tensile reinforcement are applied prestressing force, lock with locking ground tackle (8) after stretch-draw finishes, cut off unnecessary steel strand or high tensile reinforcement, the protruded length after the anchoring of guiding principle twisted wire should not be less than 30mm, and ground tackle is used the end-blocking concrete protective.At last by the grout hole (10) of locking on the ground tackle to the interior cement injection mortar of isolated tube (5), being in the milk front duct should be moistening, clean, should slowly carry out equably during grouting, must not interrupt, and should make the exhaust of steam vent clear and coherent, until fill up cement mortar in the isolated tube.Adopt the present invention, can under identical bending resistance carrying design condition, save a large amount of reinforcing bars, concrete, saved building costs.
Claims (5)
1. post-tensioned prestressing rectangle hollow foundation pit supporting pile, it is the concrete pile that is made of concrete, rectangle cage of reinforcement and rectangle stabilizing ring rib, the rectangle cage of reinforcement includes reinforcing bar and stirrup, reinforcing bar is fixed by stirrup, it is characterized in that: the rectangle cage of reinforcement is reinforcing bar near foundation ditch inboard and adjacent both sides thereof, for being provided with the isolated tube of steel strand or high tensile reinforcement, and be respectively equipped with a stake top locking ground tackle and a stake end bearing plate at the two ends of steel strand or high tensile reinforcement near the foundation ditch outside.
2. a kind of post-tensioned prestressing rectangle hollow foundation pit supporting pile according to claim 1 is characterized in that: steel strand or high tensile reinforcement bottom are fixedly connected with a stake end bearing plate.
3. a kind of post-tensioned prestressing rectangle hollow foundation pit supporting pile according to claim 1 is characterized in that: steel strand or high tensile reinforcement top lock by stake top locking ground tackle.
4. a kind of post-tensioned prestressing rectangle foundation pit soldier pile according to claim 1 is characterized in that: a locking ground tackle in stake top is provided with grout hole and steam vent.
5. a kind of post-tensioned prestressing rectangle foundation pit soldier pile according to claim 1, it is characterized in that: its construction sequence is carried out in the following order: 1., with reinforcing bar, isolated tube, steel strand or high tensile reinforcement and stake end pressure-bearing fixed head are seated in the default rectangle foundation pit soldier pile hole, then one by one reinforcing bar and isolated tube are carried out colligation formation rectangle cage of reinforcement with stirrup, and pressure-bearing fixed head at the bottom of the stake is placed on isolated tube below, be fixed with the steel strand that from isolated tube, pass or high tensile reinforcement and be connected, during colligation with a side of isolated tube and steel strand or high tensile reinforcement in the foundation ditch arranged outside; 2., the hollow pile inner side template is installed, and after effectively fixing, carry out concreting, form rectangle hollow foundation pit supporting pile pile body; 3., treat rectangle hollow foundation pit supporting pile pile strength reach designing requirement 75% the time remove inner side template, a locking ground tackle in stake top is installed; 4., build rectangle stabilizing ring rib, and fully vibrate make its inner fill closely knit; 5., steel strand or high tensile reinforcement applied prestressing force and lock a ground tackle with the stake top lock, cut off unnecessary steel strand or high tensile reinforcement; 6., from the grout hole of stake top locking ground tackle to isolated tube in the cement injection mortar, until fill up cement mortar in the isolated tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105909859A CN103031841A (en) | 2012-12-31 | 2012-12-31 | Post-tensioned prestressing rectangular hollow foundation pit support pile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012105909859A CN103031841A (en) | 2012-12-31 | 2012-12-31 | Post-tensioned prestressing rectangular hollow foundation pit support pile |
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| CN103031841A true CN103031841A (en) | 2013-04-10 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105256845A (en) * | 2015-09-25 | 2016-01-20 | 甘肃省建筑科学研究院 | Pile end post-grouting grouting pipe snapping-prevention device used for measuring pile through self-balancing method |
| CN105780770A (en) * | 2016-04-01 | 2016-07-20 | 江苏东浦管桩有限公司 | Pre-tensioning method prestressed concrete high-strength anticorrosion anti-seismic hollow square pile |
| CN108222011A (en) * | 2016-12-22 | 2018-06-29 | 上海班升科技有限公司 | The foundation pit supporting method of recoverable prestressed steelframe is set in a kind of hollow support pile |
| CN113605374A (en) * | 2021-08-31 | 2021-11-05 | 上海远方基础工程有限公司 | Post-tensioned prestressing rectangular cast-in-place pile |
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| CN1041807A (en) * | 1989-09-02 | 1990-05-02 | 江西省电力设计院 | Partially prestressed electric wire pole with equal diameter |
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2012
- 2012-12-31 CN CN2012105909859A patent/CN103031841A/en active Pending
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| CN1041807A (en) * | 1989-09-02 | 1990-05-02 | 江西省电力设计院 | Partially prestressed electric wire pole with equal diameter |
| JP2000192456A (en) * | 1998-12-28 | 2000-07-11 | Mitani Sekisan Co Ltd | Foundation pile structure in soft ground and foundation pile method |
| CN1619063A (en) * | 2004-12-08 | 2005-05-25 | 重庆交通科研设计院 | Post stress method stake body prestressed antislid stake and construction method |
| CN101105033A (en) * | 2007-07-31 | 2008-01-16 | 华丰建设股份有限公司 | Method for supporting and protecting building foundation pit by employing transverse-diaphragm prestressing concrete pipe pile |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105256845A (en) * | 2015-09-25 | 2016-01-20 | 甘肃省建筑科学研究院 | Pile end post-grouting grouting pipe snapping-prevention device used for measuring pile through self-balancing method |
| CN105780770A (en) * | 2016-04-01 | 2016-07-20 | 江苏东浦管桩有限公司 | Pre-tensioning method prestressed concrete high-strength anticorrosion anti-seismic hollow square pile |
| CN108222011A (en) * | 2016-12-22 | 2018-06-29 | 上海班升科技有限公司 | The foundation pit supporting method of recoverable prestressed steelframe is set in a kind of hollow support pile |
| CN113605374A (en) * | 2021-08-31 | 2021-11-05 | 上海远方基础工程有限公司 | Post-tensioned prestressing rectangular cast-in-place pile |
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Application publication date: 20130410 |