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Pressure resistance and pull-out resistance grouted gravel pile

A kind of gravel pile and grouting technology, applied in sheet pile wall, soil protection, construction and other directions, can solve the problem of inability to meet the anti-floating problem, improve the compressive and pull-resistant performance, the construction process is simple, and the economic benefits are good. Effect

Inactive Publication Date: 2010-06-16
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Although the pile body can withstand relatively large loads in terms of compression resistance, it is a weak link in terms of tensile resistance because it does not contain tendons inside. The needs of anti-floating and other aspects of structures

Method used

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  • Pressure resistance and pull-out resistance grouted gravel pile
  • Pressure resistance and pull-out resistance grouted gravel pile
  • Pressure resistance and pull-out resistance grouted gravel pile

Examples

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Embodiment 1

[0020] A grouted gravel pile with a pile length of 15m and a pile diameter of 0.8m is constructed on the clay foundation. Vibro punching is used to make holes at good hole positions. When making holes, the self-weight of the vibrator is used to slowly drop, and the hole making can be stopped when the designed hole depth is reached. After the hole is made and cleared, the anchor pipe (welded anchor pipe) with a length of 17m and a diameter of 89mm is hoisted into the hole and statically pressed until it is tangent to the ground, so that the anchor pipe penetrates 2m into the soil layer at the bottom of the pile. Fine-tune the position of the anchor tube so that it is vertically located in the center of the pile. Insert a grade III steel bar with a length of 17m and a diameter of 25mm into the anchor pipe, and fix it centered by welding a tripod on the steel bar. After the construction of the anchor pipe is completed, fill the hole from around the opening of the gravel pile, an...

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Abstract

The invention relates to a pressure resistance and pull-out resistance grouted gravel pile used for the soft ground treatment of the civil engineering and road engineering. The invention provides a technology which adopts the pressure resistance and pull-out resistance grouted gravel pile to treat the soft ground by adding an anchor pipe in the conventional gravel pile, inserting a steel bar in the anchor pipe and grouting. Compared with the conventional gravel pile, the strength of the pile body of the invention and the bearing strength of the ground are significantly increased and the pull-out resistance of the pipe body is greatly improved.

Description

technical field [0001] The invention relates to the technical field of a compression-resistant and pull-resistant dual-purpose grouted gravel pile used for treating soft ground in civil engineering and road engineering. Background technique [0002] Grouting gravel pile composite foundation is an artificial foundation composed of improved soil between piles and grouting gravel piles. Holes are drilled at the pile site and crushed stones are thrown in the reinforced site, and then the crushed stones in the piles are subjected to low-pressure grouting. Carry out medium and high pressure grouting to further compact the pile body and the soil around the pile to form a composite foundation composed of grouted gravel piles, modified soil around the pile and soil between the piles. Grouting gravel pile combines the advantages of gravel pile and pressure grouting. It is a new foundation treatment method. It has the following characteristics: the soil between piles is compacted and ...

Claims

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Application Information

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IPC IPC(8): E02D5/46E02D3/08
Inventor 蔡袁强王军丁光亚叶强
Owner WENZHOU UNIVERSITY
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