CN102345293B - A kind of ground pit inclined tension pile - Google Patents
A kind of ground pit inclined tension pile Download PDFInfo
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- CN102345293B CN102345293B CN201110204511.1A CN201110204511A CN102345293B CN 102345293 B CN102345293 B CN 102345293B CN 201110204511 A CN201110204511 A CN 201110204511A CN 102345293 B CN102345293 B CN 102345293B
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- steel strand
- strand cable
- enlarged footing
- prestress steel
- mixing method
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Abstract
The invention discloses a kind of ground pit inclined tension pile, comprise cement mixing method, concrete column core in cement mixing method, also comprise bearing surface, feature is that concrete column in-core has been coaxially set prestress steel strand cable, described prestress steel strand cable is at least provided with an enlarged footing, prestress steel strand cable upper end through doing stretch-draw after foundation pit side-wall, pass set by bearing surface hole again after be fixedly connected with.It is high that steel strand cable bottom of the present invention is provided with the concrete prefabricated intensity of enlarged footing, greatly reduces concentrating of local stress.The concrete on enlarged footing and top thereof and cement mixing method are linked to be semi-rigid entirety, and the frictional force of above pulling out, to the diffusion of the periphery soil body, improves the bearing capacity of prestressing force composite pile.The intensity of steel strand cable is 5-8 times of general reinforced steel bar strength, saves a large amount of steel.
Description
Technical field
The present invention relates to building field, be specifically related to uplift pile.
Background technology
In recent years, along with the exploitation of the underground space, underground garage newly-built in a large number, pattern foundation pit supporting structure becomes problem very important in civil engineering construction.At present, be all generally adopt cement mixing method add campshed or adopt plate brad supporting to the supporting of foundation pit side-wall, costly, and soil nailing reliability is poor for campshed, applies and has significant limitation, bring potential safety hazard sometimes to building operations.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of ground pit inclined tension pile, has good supporting and resistance to plucking effect.
The present invention is achieved through the following technical solutions:
A kind of ground pit inclined tension pile, comprise cement mixing method, concrete column core in cement mixing method, also comprise bearing surface, feature is that concrete column in-core has been coaxially set prestress steel strand cable, described prestress steel strand cable is at least provided with an enlarged footing, prestress steel strand cable upper end through doing stretch-draw after foundation pit side-wall, pass set by bearing surface hole again after be fixedly connected with.
The further improvement project of the present invention is that described enlarged footing is arranged at the lower end of prestress steel strand cable.
The present invention further improvement project is, enlarged footing is concrete precast element, and described enlarged footing is provided with hole, and the lower end of prestress steel strand cable is connected and fixed through described hole.
The present invention further improvement project is, prestress steel strand cable top is provided with sleeve pipe, and bottom and column core bond (less than 1/2 position does not have sleeve pipe, bonds with column core).Described uplift pile, to lopsidedness, is less than 90 degree with the vertical angle of foundation pit side-wall.
The present invention compared with prior art, has following obvious advantage:
One, enlarged footing concrete prefabricated intensity in steel strand cable bottom is high, greatly reduces concentrating of local stress.
Two, the concrete on enlarged footing and top thereof and cement mixing method are linked to be semi-rigid entirety, and the frictional force of above pulling out, to the diffusion of the periphery soil body, improves the bearing capacity of prestressing force composite pile.
Three, the intensity of steel strand cable is 5-8 times of general reinforced steel bar strength, saves a large amount of steel.
Accompanying drawing explanation
Fig. 1 is the longitudinal cross-sectional schematic of the present invention.
Detailed description of the invention
As shown in Figure 1, the present invention includes cement mixing method 1, the concrete column core 2 in cement mixing method 1, also comprises cushion cap face 3.
Still as shown in Figure 1, be coaxially set in concrete column core 2 prestress steel strand cable 4, the lower end of described prestress steel strand cable 4 is provided with enlarged footing, do stretch-draw after prestress steel strand cable upper end passes foundation pit side-wall 7, pass bearing surface 3 again after be connected and fixed (connector 5 adopts anchor clamp in the present embodiment) by connector 5.Described uplift pile, to lopsidedness, is 60 degree with the vertical angle of foundation pit side-wall 7.
Still as shown in Figure 1, enlarged footing 6 is concrete precast element, and enlarged footing 6 is provided with hole, and the lower end of prestress steel strand cable 4 is connected and fixed (anchor clamp of connector employing in the present embodiment) by connector through described hole.
Still as shown in Figure 1, prestress steel strand cable 4 top is provided with sleeve pipe 8(mainly in order to stretch-draw forms prestressing force), bottom and column core 2 bond (less than 1/4th positions and column core bond).
Preparation process of the present invention: first prepare the enlarged footing (concrete precast element) with centre bore, the centre bore of enlarged footing is passed in prestress steel strand cable lower end and is connected and fixed with anchor clamp or extruding anchor, (steel strand cable itself, with sleeve pipe, has sliding agent in sleeve pipe to remove the sleeve pipe at steel strand cable less than 1/4 position.If outer tube do not established by steel strand cable, then need separately to add sleeve pipe and pipe in-lubricant), by described prestress steel strand cable from bottom to top through vibrating into pipe, then, be positioned in cement-soil by vibrating into pipe, limit vibration, limit upwards move back pipe, simultaneously to fluid concrete in pipe, until desired location.After concrete setting, stretch-draw steel strand cable, and with anchor clamp, steel strand cable is connected and fixed on the bearing surface of foundation pit side-wall another side.
Claims (5)
1. a ground pit inclined tension pile, comprises cement mixing method, and the concrete column core in cement mixing method, also comprises
Bearing surface, is characterized in that: concrete column in-core has been coaxially set prestress steel strand cable, and prestress steel strand cable upper end is passed
Do stretch-draw after foundation pit side-wall, pass bearing surface again after be fixedly connected with; Described prestress steel strand cable is at least provided with an enlarged footing.
2. a kind of ground pit inclined tension pile as claimed in claim 1, is characterized in that: described enlarged footing is arranged at the lower end of prestress steel strand cable.
3. a kind of ground pit inclined tension pile as claimed in claim 1 or 2, is characterized in that: described enlarged footing is concrete precast element, and enlarged footing is provided with hole, and the lower end of prestress steel strand cable is connected and fixed through described hole.
4. a kind of ground pit inclined tension pile as claimed in claim 1 or 2, is characterized in that: prestress steel strand cable top is provided with sleeve pipe, and bottom and column core bond.
5. a kind of ground pit inclined tension pile as claimed in claim 1, is characterized in that: described uplift pile, to lopsidedness, is less than 90 degree with the vertical angle of foundation pit side-wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110204511.1A CN102345293B (en) | 2011-07-21 | 2011-07-21 | A kind of ground pit inclined tension pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110204511.1A CN102345293B (en) | 2011-07-21 | 2011-07-21 | A kind of ground pit inclined tension pile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102345293A CN102345293A (en) | 2012-02-08 |
| CN102345293B true CN102345293B (en) | 2015-12-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201110204511.1A Active CN102345293B (en) | 2011-07-21 | 2011-07-21 | A kind of ground pit inclined tension pile |
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| CN (1) | CN102345293B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4036026A (en) * | 1974-07-05 | 1977-07-19 | Kabushiki Kaisha Takechi Koumusho | Method and apparatus for establishing an anchor |
| CN200961263Y (en) * | 2006-08-29 | 2007-10-17 | 湖北中南岩土工程有限公司 | Fixed valve locking type reclaimable rockbolt |
| CN101798810A (en) * | 2009-02-20 | 2010-08-11 | 上海强劲基础工程有限公司 | Cement-soil composite pile inserted into reinforced concrete core materials |
| CN201665872U (en) * | 2010-03-23 | 2010-12-08 | 南通宏华建筑安装有限公司 | Anchoring pile supporting structure for reinforced cement-soil |
| CN202194144U (en) * | 2011-07-21 | 2012-04-18 | 从卫民 | Ground pit inclined tension pile |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102108708A (en) * | 2010-12-16 | 2011-06-29 | 张继红 | Compound anchor rod foundation pit building envelope, construction method thereof and adopted cement soil notcher |
-
2011
- 2011-07-21 CN CN201110204511.1A patent/CN102345293B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4036026A (en) * | 1974-07-05 | 1977-07-19 | Kabushiki Kaisha Takechi Koumusho | Method and apparatus for establishing an anchor |
| CN200961263Y (en) * | 2006-08-29 | 2007-10-17 | 湖北中南岩土工程有限公司 | Fixed valve locking type reclaimable rockbolt |
| CN101798810A (en) * | 2009-02-20 | 2010-08-11 | 上海强劲基础工程有限公司 | Cement-soil composite pile inserted into reinforced concrete core materials |
| CN201665872U (en) * | 2010-03-23 | 2010-12-08 | 南通宏华建筑安装有限公司 | Anchoring pile supporting structure for reinforced cement-soil |
| CN202194144U (en) * | 2011-07-21 | 2012-04-18 | 从卫民 | Ground pit inclined tension pile |
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| Publication number | Publication date |
|---|---|
| CN102345293A (en) | 2012-02-08 |
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