Prestress uplift pile and construction method thereof

A construction method and technology of uplift piles, which are applied in sheet pile walls, manufacturing tools, infrastructure engineering, etc., can solve the problems of different connection strengths of uplift piles with different lengths, difficulties in prefabricating and connecting pipe piles, poor durability of piles, etc. Achieve the effect of enhancing the overall tensile strength and pullout resistance, saving production costs, improving service life and corrosion resistance

Active Publication Date: 2014-01-01
江苏森林建筑新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are more and more domestic underground projects, especially multi-storey underground projects that involve the application of uplift piles. Most of the domestic uplift piles use prestressed pipe piles and cast-in-place piles, and prestressed pipe piles are used as When the uplift pile is applied, due to the different geological conditions of each underground project, the length of the required uplift pile and the connection strength problem, it is difficult to prefabricate and connect the pipe pile, and the manufacturing cost is high; the cast-in-place pile is used as the uplift pile application When the connection problem is solved, but limited by the technical requirements of uplift piles, and the durability of the pile body is poor, in order to meet the design requirements of tensile bearing capacity and durability, large-scale steel bars are often required as reinforcement, and the amount of steel bars is large , high cost

Method used

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  • Prestress uplift pile and construction method thereof
  • Prestress uplift pile and construction method thereof
  • Prestress uplift pile and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This embodiment provides a kind of prestressed uplift pile, see Figure 1-2 , including concrete and steel cage frames, but also unbonded prestressed steel bars.

[0039] The two ends of the unbonded prestressed steel bar are respectively provided with a first thread tooth end and a second thread tooth end, the length of the first thread tooth end is equal to or greater than the second thread tooth end, and the length of the second thread tooth end is the length of the steel bar connector half the length. Both ends of the tendon body of the unbonded prestressed reinforcement are respectively fixed with sleeves 13 matching the external dimensions, and the length of the sleeve 13 is shorter than the length of the unbonded prestressed reinforcement. The reinforcement cage frame is composed of at least two sections of reinforcement cages connected. Each section of the reinforcement cage is composed of stirrups 6 and high-strength reinforcements 5. The high-strength reinfor...

Embodiment 2

[0042] This embodiment provides a kind of prestressed uplift pile, see Figure 1-2 , including concrete and steel cage frames, but also unbonded prestressed steel bars.

[0043] The two ends of the unbonded prestressed steel bar are respectively provided with a first thread tooth end and a second thread tooth end, the length of the first thread tooth end is equal to or greater than the second thread tooth end, and the length of the second thread tooth end is the length of the steel bar connector half the length. Both ends of the tendon body of the unbonded prestressed reinforcement are respectively fixed with sleeves 13 matching the external dimensions, and the length of the sleeve 13 is shorter than the length of the unbonded prestressed reinforcement. The reinforcement cage frame is composed of at least two sections of reinforcement cages, and each section of the reinforcement cage is composed of stirrups 6 and unbonded prestressed reinforcement. The unbonded prestressed re...

Embodiment 3

[0047] This embodiment is a construction method of prestressed uplift piles, including the following steps.

[0048] Firstly, in the factory, the smooth round prestressed steel bar 1 is cut according to the length required by the project, and the two ends are rolled into the required thread teeth by a thread rolling machine, wherein the length of one end of the thread teeth is equal to or greater than the other end, and the rolled Good smooth round prestressed steel bars are coated with anti-corrosion oil and wrapped with plastic sleeves 2 by an injection molding machine to make unbonded prestressed steel bars.

[0049] The steel bar connector 4, the anchor plate 11, the locking nut 10 and the node 3 are manufactured according to the size, thread teeth and strength requirements of the prestressed steel bar 1.

[0050] Transport the processed unbonded prestressed steel bar to the construction site, cut and remove the plastic wrapped in the thread teeth, and screw the steel bar ...

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Abstract

The invention discloses a prestress uplift pile and a construction method of the prestress uplift pile. The prestress uplift pile is composed of a reinforcing cage and a small number of unbonded prestressed reinforcement bars. Long and short thread teeth are arranged on the unbonded prestressed reinforcement bars, casing pipes are fixed in the reinforcing cage, meanwhile, the connected unbonded prestressed reinforcement bars are fixed through pitch points, and rapid locating is conducted. The prestress uplift pile satisfies the requirements for prestressed reinforcement bar construction in the post-tensioning method, enables the prestressing force of the reinforcement bars to be transmitted conveniently, enhances the overall tensile resistance and pulling resistance, saves the manufacturing cost, simplifies the construction procedure and enables the manual operation to be convenient.

Description

technical field [0001] The invention relates to the field of construction, and more particularly to a construction method for building foundation piles, in particular to a prestressed uplift-resistant pile and a construction method thereof. Background technique [0002] At present, there are more and more domestic underground projects, especially multi-storey underground projects that involve the application of uplift piles. Most of the domestic uplift piles use prestressed pipe piles and cast-in-place piles, and prestressed pipe piles are used as When the uplift pile is applied, due to the different geological conditions of each underground project, the length of the required uplift pile and the connection strength problem, it is difficult to prefabricate and connect the pipe pile, and the manufacturing cost is high; the cast-in-place pile is used as the uplift pile application When the connection problem is solved, but limited by the technical requirements of the uplift pi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/58E02D5/30B28B23/06
Inventor 姚圣法吴栋冯健吴海洋
Owner 江苏森林建筑新材料股份有限公司
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