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Pervious concrete post-grouting foundation reinforcing method, transition pile and composite pile forming system

A technology for permeable concrete and foundation reinforcement, applied in the field of geotechnical engineering, can solve the problems of ineffective improvement of soil between piles, poor water permeability of pile body materials, slow foundation soil consolidation, etc., and achieves unique treatment effects and shortens construction period. , the effect of saving investment

Pending Publication Date: 2018-08-24
中南航空港建设公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of the strength of the pile body, the bulk pile and flexible pile have a certain limit to the improvement of the bearing capacity of the foundation, generally no more than 160kPa; while the rigid pile has a high strength and high stiffness, which can well meet the needs of composite foundations. Requirements for bearing capacity and settlement, but in view of the generally poor water permeability of the pile body material, the consolidation speed of the foundation soil is slow, and the soil between the piles cannot be effectively improved
[0005] The above two types of ground treatment technologies have their own advantages, but there is a lack of joint use in engineering, and the advantages of these two types of ground treatment technologies cannot be maximized, so they are often subject to certain restrictions in their respective applications

Method used

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  • Pervious concrete post-grouting foundation reinforcing method, transition pile and composite pile forming system
  • Pervious concrete post-grouting foundation reinforcing method, transition pile and composite pile forming system
  • Pervious concrete post-grouting foundation reinforcing method, transition pile and composite pile forming system

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Embodiment approach 1

[0037] A post-grouting foundation reinforcement method for permeable concrete of the present invention comprises the following steps:

[0038] 1) Use mechanical drilling to form holes to the design depth of foundation reinforcement, such as figure 1 As shown, insert the porous tube 1 (the porous tube is not pulled out, and the upper end of the porous tube is higher than the edge of the drilled hole, such as figure 2 shown); 2) Pouring permeable concrete 2 between the borehole and the perforated pipe, the height of the poured permeable concrete is close to the edge of the borehole, the permeable concrete and the perforated pipe are poured to form a hollow permeable concrete pile, and ordinary concrete is used on the top of the pile 3 Seal the drilled holes, such as image 3 (The permeable concrete pile is the transition pile, wherein the permeable concrete 2 forms a permeable concrete layer on the periphery of the porous pipe 1, and the permeable concrete layer is fixedly con...

Embodiment approach 2

[0043] A kind of post-grouting foundation reinforcement method of permeable concrete of the present invention, such as Figure 6 As shown, it specifically includes the following steps:

[0044] 1) Use mechanical drilling to form holes to the design depth of foundation reinforcement, such as figure 1 As shown, insert the porous pipe (the steel pipe is not pulled out, and the upper end of the porous pipe is higher than the edge of the drilled hole, such as figure 2 shown); 2) pour permeable concrete between the borehole and the porous pipe, the height of the poured permeable concrete is close to the edge of the borehole, the poured permeable concrete and the porous pipe form a hollow permeable concrete pile, that is, a transition pile, and on the top of the pile Ordinary concrete is used to seal the borehole, such as image 3 (The permeable concrete pile is the transition pile, wherein the permeable concrete 2 forms a permeable concrete layer on the periphery of the porous pipe...

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Abstract

The invention discloses a pervious concrete post-grouting foundation reinforcing method. The pervious concrete post-grouting foundation reinforcing method comprises the steps of forming a hole by a drilling machine, then inserting a perforated pipe and pouring a pervious concrete transition pile; then consolidating and draining a foundation; and pouring cement slurry after foundation soil meets the requirements of consolidation and drainage. The invention further discloses a transition pile used for reinforcing the pervious concrete post-grouting foundation and the transition pile comprises the perforated pipe at the inner layer and a pervious concrete layer fixed at the outer side. The invention further discloses a composite pile forming system. The composite pile forming system comprisesthe above-mentioned transition pile and further comprises a drainage connecting pipe, water pumping equipment, a grouting connecting pipe and grouting equipment. By means of the method, the defectivefoundation can be sufficiently improved and the bearing capacity can be greatly improved; moreover, the consolidation speed, effect and the like of the foundation soil can be effectively improved.

Description

technical field [0001] The invention relates to the field of geotechnical engineering, in particular to a permeable concrete post-grouting foundation reinforcement method and a transition pile and composite pile forming system. Background technique [0002] Ground treatment technology is an important part of geotechnical engineering technology, and it is widely used in ground reinforcement of construction, highway, railway and water conservancy projects. Among them, drainage consolidation technology and composite foundation technology are the most widely used foundation treatment technologies. [0003] Drainage consolidation technology provides drainage channels for soil consolidation by laying plastic drainage boards and sand piles in advance, and accelerates soil consolidation under the action of heap load or vacuum preloading, thereby improving the mechanical properties of foundation soil. However, this method is often limited by the inherent characteristics of the found...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/12E02D3/10E02D3/08E02D5/38
CPCE02D3/08E02D3/10E02D3/12E02D5/38
Inventor 杨宾川张浩杨夫礼吴爱红罗杰蔡威黄江田松伟吴晓燕孟新秋李建华
Owner 中南航空港建设公司
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