CN102363957A - Post-tensioned pre-stressed compound uplift pile - Google Patents

Post-tensioned pre-stressed compound uplift pile Download PDF

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Publication number
CN102363957A
CN102363957A CN2011102045126A CN201110204512A CN102363957A CN 102363957 A CN102363957 A CN 102363957A CN 2011102045126 A CN2011102045126 A CN 2011102045126A CN 201110204512 A CN201110204512 A CN 201110204512A CN 102363957 A CN102363957 A CN 102363957A
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post
steel strand
strand cable
tensioned prestressing
tensioned
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CN2011102045126A
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CN102363957B (en
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从卫民
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从卫民
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Abstract

The invention discloses a post-tensioned pre-stressed compound uplift pile, which comprises a cement mixing pile, wherein a reinforced concrete cylindrical core in the cement mixing pile is arranged on a cushion cap surface at the upper end of the pile. The post-tensioned pre-stressed compound uplift pile is characterized in that: a post-tensioned pre-stressed steel strand cable is arranged coaxially in the cylindrical core, and is provided with at least one extension head; the steel strand cable is arranged around the periphery of the cylindrical core; the steel strand cable is fixed through a connecting piece after tensioning; and the steel strand cable and the connecting piece thereof are positioned in the cushion cap surface. The post-tensioned pre-stressed compound uplift pile has the advantages that: the compound uplift advantages of the cement mixing pile and reinforced concrete are brought into full play, a larger friction surface is formed, a required concrete pile has a small pile body, and the economic benefit is remarkable.

Description

The compound uplift pile of a kind of post-tensioned prestressing
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 used is 800 of ∮ 500-∮ to be disposed the 4-12 root by the resistance to plucking load do not have bonding steel strand cable, and colligation is on reinforcing cage; The lower end of steel strand cable is not for there being bonding; The bottom adopts the pressure-bearing steel plate to fix, and after concrete strength reaches more than 75%, begins stretch-draw, anchoring after the stretch-draw.
The stake advantage of this structure is: save steel, improve pile body stiffness and crack resistance, but also exist obvious defects, promptly anti-pulling capacity is merely the frictional force of the pile body and the soil body, and needed pile body is longer, waste material, uneconomical.
Summary of the invention
The technical problem that the present invention will solve provides the compound uplift pile of a kind of post-tensioned prestressing, improves building pile foundation anti-floating, resistance to plucking, supporting capacity, simultaneously, practices thrift the steel using amount of pile foundation.
The present invention realizes through following technical scheme:
The compound uplift pile of a kind of post-tensioned prestressing; Comprise cement mixing method, the steel concrete column core in the cement mixing method is arranged at a cushion cap face of upper end; Characteristics are the column in-core post-tensioned prestressing steel strand cables that have been coaxially set; Said post-tensioned prestressing steel strand cable is provided with around column core periphery, fixes through connector after the stretch-draw of post-tensioned prestressing steel strand cable, and said steel strand cable and connector thereof are positioned at the cushion cap face.
The further improvement project of the present invention is to be provided with an enlarged footing on the post-tensioned prestressing steel strand cable at least.When enlarged footing was one, said enlarged footing was arranged at the lower end of steel strand cable; When enlarged footing be one with
When last, said enlarged footing sets gradually to the upper end from the lower end of steel strand cable.
The present invention further improvement project is that said enlarged footing is nut or extruding anchor or concrete precast element.When enlarged footing was concrete precast element, said concrete precast element was provided with the hole, and post-tensioned prestressing steel strand cable passes said hole and connects fixing with connector;
When enlarged footing is nut or extruding anchor, on the post-tensioned prestressing steel strand cable above nut or the extruding anchor, be provided with billet (being that said steel strand cable passes 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 the prestress pulling resistant anchor pile technology; Bond the compound anchoring body of formation each other through cement mixing pile, steel concrete and steel strand cable; The suffered pulling force of anchoring body is diffused into cement-soil through steel concrete and is delivered in the stable soil layer again, and pulling resistant anchor pile is linked to be integral body 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 steel concrete, form bigger rubbing surface, needed concrete pile body is little, and economic benefit is obvious.
Description of drawings
Fig. 1 is a 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 sketch map among Fig. 1.
The specific embodiment
Like Fig. 1, shown in 2, the present invention includes cement mixing method 1, the steel concrete column core 2 in the cement mixing method 1 is arranged at a cushion cap face 3 of upper end.The post-tensioned prestressing steel strand cable 4 that has been coaxially set in the said column core 2, said steel strand cable 4 be around the 2 periphery settings of column core, and be provided with the pre-tensioned prestressing spacing of reinforcement of reinforcement cage skeleton 9 in the column core, and it is connected in reinforcement cage skeleton 9.
Like Fig. 1, shown in 3, post-tensioned prestressing steel strand cable 4 is provided with an enlarged footing 5, and said enlarged footing 5 is arranged at the lower end of said steel strand cable 4.Enlarged footing 5 is selected the extruding anchor for use in the present embodiment, on the post-tensioned prestressing steel strand cable 4 above the extruding anchor, is provided with billet 7.Still like Fig. 1, shown in 3, post-tensioned prestressing steel strand cable 4 tops are provided with sleeve pipe 8, bottom and column core bonding.Remove the steel strand cable roughly the sleeve pipe at 1/4th following positions (the steel strand cable itself has sleeve pipe, and sliding agent is arranged in the sleeve pipe.If the steel strand cable is not established outer tube, then need add sleeve pipe and pipe in-lubricant in addition).
As shown in Figure 1, fixing through connector 6 after 4 stretch-draw of post-tensioned prestressing steel strand cable, said steel strand cable 4 and connector 6 thereof are positioned at the cushion cap face.Connector 6 is selected anchor clamp for use in the present embodiment.
The present invention prepares process: prepare cement mixing pile earlier; Treat to hole after cement mixing pile is accomplished 12-14h; Add reinforcing cage as shown in Figure 1, water pile concrete and the cushion cap face thereof smash, after cement mixing pile and steel concrete pile body reach intensity, steel strand cable 4 is carried out stretch-draw; Behind the tensioning fixation, adopt the hole (steel strand cable upper end and connector are embedded in the cushion cap face) on the expansion concrete pouring cushion cap face.

Claims (7)

1. compound uplift pile of post-tensioned prestressing; Comprise cement mixing method, the steel concrete column core in the cement mixing method is arranged at a cushion cap face of upper end; It is characterized in that: the column in-core post-tensioned prestressing steel strand cable that has been coaxially set; Said post-tensioned prestressing steel strand cable is provided with around column core periphery, fixes through connector after the stretch-draw of post-tensioned prestressing steel strand cable, and said steel strand cable and connector thereof are positioned at the cushion cap face.
2. the compound uplift pile of a kind of post-tensioned prestressing as claimed in claim 1 is characterized in that: be provided with an enlarged footing on the post-tensioned prestressing steel strand cable at least.
3. the compound uplift pile of a kind of post-tensioned prestressing as claimed in claim 2 is characterized in that: when enlarged footing was one, said enlarged footing was arranged at the lower end of steel strand cable;
When enlarged footing is one when above, said enlarged footing sets gradually to the upper end from the lower end of steel strand cable.
4. like claim 2 or the compound uplift pile of 3 described a kind of post-tensioned prestressings, it is characterized in that: said enlarged footing is nut or extruding anchor or concrete precast element.
5. the compound uplift pile of a kind of post-tensioned prestressing as claimed in claim 4 is characterized in that: when enlarged footing was concrete precast element, said concrete precast element was provided with the hole, and post-tensioned prestressing steel strand cable passes said hole and connects fixing; When enlarged footing is nut or extruding anchor, on the post-tensioned prestressing steel strand cable above nut or the extruding anchor, be provided with billet.
6. according to claim 1 or claim 2 the compound uplift pile of a kind of post-tensioned prestressing, it is characterized in that: post-tensioned prestressing steel strand cable top is provided with sleeve pipe, bottom and column core bonding.
7. according to claim 1 or claim 2 the compound uplift pile of a kind of post-tensioned prestressing is characterized in that: the pre-tensioned prestressing spacing of reinforcement of the reinforcement cage skeleton in post-tensioned prestressing steel strand cable and the column core is provided with, and it is connected in reinforcement cage skeleton.
CN201110204512.6A 2011-07-21 2011-07-21 A kind of post-tensioned prestressing composite uplift pile Active CN102363957B (en)

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CN201110204512.6A CN102363957B (en) 2011-07-21 2011-07-21 A kind of post-tensioned prestressing composite uplift pile

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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

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CN102363957B CN102363957B (en) 2016-05-11

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Cited By (4)

* Cited by examiner, † Cited by third party
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
CN103015411A (en) * 2012-12-24 2013-04-03 从卫民 Composite compression pile provided with prestress core material
CN103015412A (en) * 2012-12-24 2013-04-03 从卫民 Composite uplift pile provided with prestress core material with variable cross-section
CN111501745A (en) * 2020-05-20 2020-08-07 温州安荷桥科技有限公司 Screw-in type uplift pile foundation

Citations (4)

* Cited by examiner, † Cited by third party
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
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

Cited By (6)

* Cited by examiner, † Cited by third party
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
CN103015411A (en) * 2012-12-24 2013-04-03 从卫民 Composite compression pile provided with prestress core material
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
CN111501745A (en) * 2020-05-20 2020-08-07 温州安荷桥科技有限公司 Screw-in type uplift pile foundation
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

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