Method for non-destructive taking-out of guard pile

A pile point and pile sinking technology, applied in the direction of sheet pile wall, building, foundation structure engineering, etc., can solve the problems of large initial pulling force, high cost, loss of recycling and reuse, etc.

Pending Publication Date: 2019-08-06
毕建东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Reinforced concrete retaining piles have poor tensile strength. If the reinforced concrete retaining piles are taken out by pulling out, it is easy to damage the retaining piles, such as cracking or even breaking, and lose the meaning of recycling.
The method of casing drilling and pulling out is high in cost and low in work efficiency
Steel retaining piles can be taken out by pulling out, but there is also the problem that the initial pulling force is too large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] Beijing Tongzhou Pipe Corridor Pile Protection Project.

[0032] The soil layer condition of the site soil from top to bottom: about 1m thick miscellaneous fill, about 2m thick soft plastic-plastic silty clay, about 30m thick slightly dense, medium dense to dense state fine sand, medium sand, The soil at the end of the pile is dense medium sand.

[0033] using PRC- D600B110 mixed reinforced prestressed concrete pipe piles are used as guard piles, with a length of 15m. Six φ20*3 grouting steel pipes are reserved at the symmetrical positions in the pile, two of which are used for grouting at the bottom of the pile and four are used for grouting at the side of the pile. Connected. Two recyclable bolts.

[0034] The construction steps and conditions are as follows:

[0035] 1. On the pile point, use a long auger to make the lower grouting loosening hole, with a diameter of 700mm, a depth of 16m, and a grouting height of 0.5m;

[0036] 2. Vibrate the sinking pile with...

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PUM

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Abstract

The invention provides a method for non-destructive taking-out of a guard pile. The method is characterized in that uplifting force is applied to the lower face of the guard pile, and after the guardpile is uplifted to a certain degree or non-destructive pile sinking is conducted on the guard pile to a certain extent, the guard pile is taken out through an existing method. By conducting soil loosening for hole guiding for sinking the guard pile, the guard pile is non-destructively sunken and non-destructively taken out, the guard pile can be recycled, and the effects of resource saving, material saving and environmental protection are achieved.

Description

technical field [0001] The invention relates to a method for taking out a guard pile without damage, and belongs to the technical field of pile foundation construction. Background technique [0002] The existing guard piles are reinforced concrete guard piles and steel guard piles. Reinforced concrete piles are used for cast-in-place piles and prefabricated piles. Generally, they are one-time and not taken out for recycling, resulting in a waste of resources, which is not conducive to environmental protection and material saving. [0003] The existing guard piles are generally removed by the method of pulling out or the method of drilling and then pulling out. The tensile strength of reinforced concrete piles is poor. Taking out the reinforced concrete piles by pulling out is easy to damage the piles, such as cracking or even breaking, and the significance of recycling is lost. The method of casing drilling and pulling out is high in cost and low in work efficiency. The s...

Claims

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Application Information

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IPC IPC(8): E02D9/00
CPCE02D9/00
Inventor 毕建东毕捷
Owner 毕建东
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