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Hybrid pre-stress steel pipe concrete pile

A technology for steel pipe concrete piles and concrete piles, which can be applied to sheet pile walls, buildings, and foundation structure engineering, etc. It can solve problems such as non-compliance with product quality standards, low pass rate, and cracks, so as to avoid product defects and improve pass rate , the effect of reducing the contact surface

Inactive Publication Date: 2015-12-02
国鼎(南通)管桩有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] But there are also certain defects: in the manufacturing process, due to the difference in the expansion coefficient of the steel pipe and the concrete, cracks will occur at the joint between the steel pipe 2 and the concrete pile body 1 in the axial direction, and the cracks even run through the entire pile body The radial surface of the product does not meet the quality standards of the product, and the pass rate is low

Method used

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  • Hybrid pre-stress steel pipe concrete pile
  • Hybrid pre-stress steel pipe concrete pile
  • Hybrid pre-stress steel pipe concrete pile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] like figure 2 As shown, it includes a concrete pile body 1, a reinforcement cage 3 built into the concrete pile body 1, and a steel pipe 2 coated outside a part of the concrete pile body 1. The steel pipe 2 is covered at the end of the concrete pile body 1, and the steel pipe 2 The outer diameter of the concrete pile body 1 is the same as that of the concrete pile body 1, and the reinforcement cage 3 is composed of a number of prestressed steel bars extending axially along the concrete pile body 1 and distributed in a ring, and spiral stirrups welded outside the prestressed steel bars.

[0029] The end faces of the two ends of the concrete pile body 1 are provided with end plates 5 connected with the prestressed steel bars of the reinforcement cage 3, and the skirt board 4 is arranged at the end of the concrete pile body 1 without the steel pipe 2, and the skirt board 4 is connected with the side end. The plate is welded and fixed.

[0030] In this embodiment, its i...

Embodiment 2

[0036] like Figure 5~7 As shown, it includes a concrete pile body 1, a reinforcement cage 3 built in the concrete pile body 1, an end plate 5 is provided on the end surface of the concrete pile body 1, and the two end plates 5 are respectively connected with the prestressed tendons at both ends of the reinforcement cage 3.

[0037] One end of the concrete pile body 1 is provided with a steel pipe 2 covering the outside of the pile body, the outer end of the steel pipe 2 is welded and fixed to one of the end plates, and the other end of the concrete pile body 1 is provided with an apron 4, the apron 4 Welded with the other end plate.

[0038] In this embodiment, the concrete pile body 1 on the axially inner side of the steel pipe 2 is covered with a transition pipe 6, and the nozzle at the axially outer end of the transition pipe 6 and the inner end of the steel pipe 2 are both provided with outer grooves for welding, so that The nozzle at the axially outer end of the transit...

Embodiment 3

[0042] like Figure 8 As shown, the concrete pile body 1 is included, and the concrete pile body 1 has a built-in steel cage 3, and a section of steel pipe 2 is covered on the outer surface of the middle part of the concrete pile body 1, and the two ends of the concrete pile body 1 are provided with steel cage 3 The end plate 5 connected to the end of the prestressing tendon is welded with the skirt plate 4 covering the end of the concrete pile body 1 .

[0043] Both ends of the steel pipe 2 are provided with transition pipes 6 covering the outside of the concrete pile body 1 , and one end of each transition pipe 6 is welded and fixed to the steel pipe 2 .

[0044]

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Abstract

The invention relates to a hybrid pre-stress steel pipe concrete pile comprising a concrete pile body, a steel reinforcement cage built in the concrete pile body, and a steel pipe wrapping partial the concrete pile body; the innovation points are that an inner wall of an orifice of the steel pipe is provided with an inner groove extending to the end face of the orifice; or, an axial connecting portion between the steel pipe and the concrete pile body is provided with a transition pipe; one end orifice of the transition pipe is welded and fixed with the steel pipe, and the inner wall of the other end orifice is provided with an inner groove extending to the end face of the orifice; the advantages are that the orifice of the steel pipe or the inner wall of the transition pipe orifice are provided with the inner groove extending to the end face of the orifice; the inner groove is arranged on the steel pipe or the end face of the transition pipe orifice, thus greatly reducing thickness, reducing an axial contact surface between the steel pipe or the transition pipe and the concrete pile body, and weakening cracking formation.

Description

technical field [0001] The invention relates to a pipe pile, in particular to a hybrid prestressed steel pipe concrete pile. Background technique [0002] With the development of concrete technology, the technology of concrete pipe piles is becoming more and more mature. In addition to being used in industrial and civil buildings, it is also widely used in various fields such as bridges, ports, railways or water conservancy projects. [0003] Prestressed high-strength concrete pipe piles (PHC pipe piles) adopt the pre-tensioned prestressed centrifugal forming process, which is widely used due to the advantages of high single pile bearing capacity and reliable pile quality, but the manufacturing cost is relatively high. The new thin-walled steel pipe centrifugal concrete pipe pile, referred to as TSC pile, is similar in appearance to the commonly used PHC pile, but its internal structure is different. The outer shell of the TSC pile is a thin-walled steel pipe with a thickne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/58E02D5/30
Inventor 姜平平陆卫明
Owner 国鼎(南通)管桩有限公司
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