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Drawing bore method for pile shoe

A pile shoe and pile feeding technology is applied in the construction field where concrete pipe piles enter the foundation, which can solve the problems of construction speed influence, limited depth of guide holes and high cost, and achieve the effect of simple construction equipment and simple construction method.

Inactive Publication Date: 2005-02-16
应义淼
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, special equipment is required for the drilling rig, which has a high cost and has a great impact on the construction speed, and the depth of the drilling is limited.
Although special equipment is not required for the lead hole of the steel pipe, the depth of the lead hole is shallower, otherwise it will cause difficulty in pulling the pipe
None of the above methods can fundamentally solve the problem of pipe piles entering the hard layer of the foundation

Method used

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  • Drawing bore method for pile shoe
  • Drawing bore method for pile shoe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] With reference to accompanying drawing, a kind of spud can lead hole method may further comprise the steps:

[0016] 1) Install a closed pile shoe 2 on the pile end of the concrete pipe pile 1;

[0017] 2) After positioning the pile 1, drive it into the foundation, and stop sending the pile before the pile sending force will reach the ultimate strength of the pile body;

[0018] 3) Put a steel pipe mandrel 3 of corresponding diameter into the cavity of the pipe pile;

[0019] 4) Use the static pressure mandrel 3 of the pile driver to send the pile shoe 2 to the set depth;

[0020] 5) Take out the mandrel and continue to send the pile to the design elevation to complete the pile foundation construction.

Embodiment 2

[0022] The difference from embodiment 1 is that in step 4, hammering the mandrel 3 is used to make the spud can 2 reach the set depth instead of using the static pressure of the pile driver.

Embodiment 3

[0024] Different from Embodiments 1 and 2, in this embodiment, after the spud can penetrates the hard layer, the pile body is sent to a deeper design depth.

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Abstract

The pile shoe hole inducing method is one kind of construction method to drive concrete pipe pile in hard foundation. Mouth-closed present invention pile shoe is mounted to bottom of concrete pipe pile, and after the pile is driven to some depth, steel pipe core shaft in proper diameter is set inside the hollow cavity of the pipe pile and used to push the pile shoe to set depth before the pile is driven in relatively small driving force to designed depth to complete the pile foundation construction. The said method avoids the problem of the pile body and can reduce cost in pile body.

Description

technical field [0001] The invention relates to a construction method for concrete pipe piles entering the foundation, in particular to a construction method for entering the hard layer of the foundation. Background technique [0002] The problem often encountered in the construction process of concrete pipe piles entering the hard foundation layer is that the pile body cannot be sent to the design elevation when the pile delivery force reaches the ultimate strength of the pile body. The current solutions are: (1) increase the concrete grade of the pipe pile, or increase the wall thickness of the concrete pipe pile, or even increase the diameter of the pipe pile, and increase the ultimate strength of the pile body, thereby increasing the force of sending the pile to the design. elevation. This method will inevitably cause the cost of pipe piles to increase significantly, and cause a lot of waste to the foundation cost. (2) The second method is to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/52E02D7/00
Inventor 应义淼
Owner 应义淼
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