CN102363957B - A kind of post-tensioned prestressing composite uplift pile - Google Patents
A kind of post-tensioned prestressing composite uplift pile Download PDFInfo
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- CN102363957B CN102363957B CN201110204512.6A CN201110204512A CN102363957B CN 102363957 B CN102363957 B CN 102363957B CN 201110204512 A CN201110204512 A CN 201110204512A CN 102363957 B CN102363957 B CN 102363957B
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- tensioned prestressing
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Abstract
The invention discloses a kind of post-tensioned prestressing composite uplift pile, comprise cement mixing method, armored concrete column core in cement mixing method, be arranged at the cushion cap face of a upper end, feature is the column in-core post-tensioned prestressing steel strand cable that has been coaxially set, and is at least provided with an enlarged footing on described steel strand cable, and steel strand cable arranges around column core periphery, after the stretch-draw of steel strand cable, fix by connector, described steel strand cable and connector thereof are positioned at cushion cap face. Advantage of the present invention is: give full play to the compound resistance to plucking advantage of cement mixing pile and armored concrete, form larger rubbing surface, needed concrete pile body is little, and economic benefit is obvious.
Description
Technical field
The present invention relates to building field, be specifically related to uplift pile.
Background technology
At present, the prestress pulling resistant stake of having applied is that 800 of ∮ 500-∮ are configured to 4-12 root without bonding steel strand cable by resistance to plucking load, and colligation is on steel reinforcement cage, the lower end of steel strand cable is without bonding, bottom adopts pressure-bearing steel plate to fix, and starts stretch-draw, anchoring after stretch-draw after concrete strength reaches more than 75%.
The stake advantage of this structure is: save steel, improve pile body stiffness and crack resistance, but also exist obvious defect, anti-pulling capacity is only the frictional force of pile body and the soil body, and needed pile body is longer, waste material, uneconomical.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of post-tensioned prestressing composite uplift pile, improves building pile foundation anti-floating, resistance to plucking, bearing capacity, meanwhile, saves the steel using amount of pile foundation.
The present invention is achieved through the following technical solutions:
A kind of post-tensioned prestressing composite uplift pile, comprise cement mixing method, armored concrete column core in cement mixing method, be arranged at the cushion cap face of a upper end, feature is the column in-core post-tensioned prestressing steel strand cable that has been coaxially set, described post-tensioned prestressing steel strand cable arranges around column core periphery, after the stretch-draw of post-tensioned prestressing steel strand cable, fixes by connector, and described steel strand cable and connector thereof are positioned at cushion cap face.
The further improvement project of the present invention is on post-tensioned prestressing steel strand cable, to be at least provided with an enlarged footing. In the time that enlarged footing is one, described enlarged footing is arranged at the lower end of steel strand cable; When enlarged footing be one with
When upper, described enlarged footing sets gradually to upper end from the lower end of steel strand cable.
The present invention further improvement project is that described enlarged footing is nut or extruding anchor or precast concrete. In the time that enlarged footing is precast concrete, described precast concrete is provided with hole, and post-tensioned prestressing steel strand cable is connected and fixed with connector through described hole;
In the time that enlarged footing is nut or extruding anchor, on the post-tensioned prestressing steel strand cable above nut or extruding anchor, be provided with billet (being that described steel strand cable is through billet).
The present invention further improvement project is that post-tensioned prestressing steel strand cable top is provided with sleeve pipe, bottom and column core bonding (being roughly 1/2nd following positions of column core height).
The present invention compared with prior art, has following obvious advantage:
The present invention adopts prestress pulling resistant anchor pile technology, mutually bond and form compound anchor solid by cement mixing pile, armored concrete and steel strand cable, the suffered pulling force of anchoring body is diffused into soil cement by armored concrete and is delivered in stable soil layer again, and pulling resistant anchor pile is linked to be entirety through prestressed stretch-draw and sole plate.
Advantage of the present invention is: give full play to the compound resistance to plucking advantage of cement mixing pile and armored concrete, form larger rubbing surface, needed concrete pile body is little, and economic benefit is obvious.
Brief description of the drawings
Fig. 1 is cross-sectional schematic of the present invention.
Fig. 2 is Figure 1A-A cross-sectional schematic.
Fig. 3 is the column core reinforcement cage skeleton schematic diagram in Fig. 1.
Detailed description of the invention
As shown in Figure 1, 2, the present invention includes cement mixing method 1, the armored concrete column core 2 in cement mixing method 1, is arranged at the cushion cap face 3 of a upper end. The post-tensioned prestressing steel strand cable 4 that has been coaxially set in described column core 2, described steel strand cable 4 is around the 2 periphery settings of column core, and arranges with the pre-tensioned prestressing spacing of reinforcement of reinforcement cage skeleton 9 in column core, and it is connected in reinforcement cage skeleton 9.
As shown in Figure 1,3, post-tensioned prestressing steel strand cable 4 is provided with an enlarged footing 5, and described enlarged footing 5 is arranged at the lower end of described steel strand cable 4. Enlarged footing 5 is selected extruding anchor in the present embodiment, on the post-tensioned prestressing steel strand cable 4 above extruding anchor, is provided with billet 7. Still as shown in Figure 1,3, post-tensioned prestressing steel strand cable 4 tops are provided with sleeve pipe 8, bottom and column core bonding. Remove steel strand cable roughly the sleeve pipe at 1/4th following positions (steel strand cable itself, with sleeve pipe, has lubricant in sleeve pipe. If steel strand cable is not established outer tube, need separately to add sleeve pipe and pipe in-lubricant).
As shown in Figure 1, fixing by connector 6 after 4 stretch-draw of post-tensioned prestressing steel strand cable, described steel strand cable 4 and connector 6 thereof are positioned at cushion cap face. Connector 6 is selected anchor clamp in the present embodiment.
Preparation process of the present invention: first prepare cement mixing pile, after completing 12-14h, cement mixing pile holes, add steel reinforcement cage as shown in Figure 1, water pile concrete and the cushion cap face thereof smash, after cement mixing pile and armored concrete pile body reach intensity, steel strand cable 4 is carried out to stretch-draw, after tensioning fixation, adopt the hole (steel strand cable upper end and connector are embedded in cushion cap face) on expansive concrete perfusion cushion cap face.
Claims (6)
1. a post-tensioned prestressing composite uplift pile, comprise cement mixing method, armored concrete column core in cement mixing method, be arranged at the cushion cap face of a upper end, it is characterized in that: the column in-core post-tensioned prestressing steel strand cable that has been coaxially set, described post-tensioned prestressing steel strand cable arranges around column core periphery, after the stretch-draw of post-tensioned prestressing steel strand cable, fixes by connector, and described steel strand cable and connector thereof are positioned at cushion cap face; Post-tensioned prestressing steel strand cable top is provided with sleeve pipe, bottom and column core bonding, between described steel strand cable and sleeve pipe, be provided with lubricant, and with column core in reinforcement cage skeleton pre-tensioned prestressing spacing of reinforcement arrange, described pre-tensioned prestressing reinforcing bar is connected in reinforcement cage skeleton.
2. a kind of post-tensioned prestressing composite uplift pile as claimed in claim 1, is characterized in that: on post-tensioned prestressing steel strand cable, be at least provided with an enlarged footing.
3. a kind of post-tensioned prestressing composite uplift pile as claimed in claim 2, is characterized in that: in the time that enlarged footing is one, described enlarged footing is arranged at the lower end of steel strand cable;
When enlarged footing is when more than one, described enlarged footing sets gradually to upper end from the lower end of steel strand cable.
4. a kind of post-tensioned prestressing composite uplift pile as claimed in claim 2 or claim 3, is characterized in that: described enlarged footing is nut or extruding anchor or precast concrete.
5. a kind of post-tensioned prestressing composite uplift pile as claimed in claim 4, is characterized in that: in the time that enlarged footing is precast concrete, described precast concrete is provided with hole, and post-tensioned prestressing steel strand cable is connected and fixed through described hole; In the time that enlarged footing is nut or extruding anchor, on the post-tensioned prestressing steel strand cable above nut or extruding anchor, be provided with billet.
6. a kind of post-tensioned prestressing composite uplift pile as claimed in claim 1 or 2, is characterized in that: the pre-tensioned prestressing spacing of reinforcement of the reinforcement cage skeleton in post-tensioned prestressing steel strand cable and column core arranges, and it is connected in reinforcement cage skeleton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110204512.6A CN102363957B (en) | 2011-07-21 | 2011-07-21 | A kind of post-tensioned prestressing composite uplift pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110204512.6A CN102363957B (en) | 2011-07-21 | 2011-07-21 | A kind of post-tensioned prestressing composite uplift pile |
Publications (2)
| Publication Number | Publication Date |
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| CN102363957A CN102363957A (en) | 2012-02-29 |
| CN102363957B true CN102363957B (en) | 2016-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110204512.6A Active CN102363957B (en) | 2011-07-21 | 2011-07-21 | A kind of post-tensioned prestressing composite uplift pile |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102650130A (en) * | 2012-04-28 | 2012-08-29 | 从卫民 | Pile body framework cage with reinforced plastic rod stirrup |
| CN103015412A (en) * | 2012-12-24 | 2013-04-03 | 从卫民 | Composite uplift pile provided with prestress core material with variable cross-section |
| CN103015411B (en) * | 2012-12-24 | 2015-05-20 | 从卫民 | Composite compression pile provided with prestress core material |
| CN108517775A (en) * | 2018-06-08 | 2018-09-11 | 王燕春 | A kind of Sarasota structure and application |
| CN111501745B (en) * | 2020-05-20 | 2021-10-12 | 温州安荷桥科技有限公司 | Screw-in type uplift pile foundation |
| CN113123332B (en) * | 2021-04-13 | 2022-09-02 | 中国建筑技术集团有限公司 | Post-tensioned slow-setting main reinforcement pressure type uplift action pile and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6040421A (en) * | 1983-08-16 | 1985-03-02 | Nippon Kokan Kk <Nkk> | Cast-in-place reinforced concrete pile |
| CN2765942Y (en) * | 2004-09-07 | 2006-03-22 | 康宪泉 | Concrete grout pile adopting prestressed concrete steel bar |
| CN101629418A (en) * | 2009-08-03 | 2010-01-20 | 天津市建筑科学研究院 | Post-tensioned prestressing cast pile and construction method thereof |
| CN201512788U (en) * | 2009-09-28 | 2010-06-23 | 河南建华管桩有限公司 | Horizontal load-bearing enhancement pre-stressed concrete pipe pile |
-
2011
- 2011-07-21 CN CN201110204512.6A patent/CN102363957B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6040421A (en) * | 1983-08-16 | 1985-03-02 | Nippon Kokan Kk <Nkk> | Cast-in-place reinforced concrete pile |
| CN2765942Y (en) * | 2004-09-07 | 2006-03-22 | 康宪泉 | Concrete grout pile adopting prestressed concrete steel bar |
| CN101629418A (en) * | 2009-08-03 | 2010-01-20 | 天津市建筑科学研究院 | Post-tensioned prestressing cast pile and construction method thereof |
| CN201512788U (en) * | 2009-09-28 | 2010-06-23 | 河南建华管桩有限公司 | Horizontal load-bearing enhancement pre-stressed concrete pipe pile |
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| CN102363957A (en) | 2012-02-29 |
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