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Variable cross-section root pile and film bag concrete combined drainage greening slope protection structure and method

A technology of tree root piles and variable cross-sections, which is applied in basic structure engineering, excavation, coastline protection, etc., can solve the problems of slope greening, reduce rainwater infiltration, and high construction costs, so as to improve fluidity and strength, increase Boundary friction and the effect of improving pullout resistance

Active Publication Date: 2021-09-24
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above problems, the present invention provides an improved variable-section tree root pile and membrane bag concrete joint drainage and greening slope protection method, which uses the improved self-stress expansion tree root pile and membrane bag concrete to carry out slope greening and support management; The ordinary tree root pile is improved into a variable cross-section self-stress expansion tree root pile, which improves the pullout resistance of the tree root pile itself. Combined with the membrane bag concrete technology, the slope can be greened and the infiltration of rainwater can be prevented. It greatly reduces the ability of rainwater to infiltrate and enhances the stability of the slope. This method can effectively solve the long construction period and high construction cost of the conventional slope support technology. While supporting the slope, it cannot take into account the slope greening The problem

Method used

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  • Variable cross-section root pile and film bag concrete combined drainage greening slope protection structure and method
  • Variable cross-section root pile and film bag concrete combined drainage greening slope protection structure and method
  • Variable cross-section root pile and film bag concrete combined drainage greening slope protection structure and method

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Embodiment 1

[0042] see Figure 1-3 , variable cross-section tree root piles and membrane bag concrete joint drainage and greening slope protection structure, which includes multiple sets of self-stress expansion tree root piles 1, the self-stress expansion tree root piles 1 are buried inside the slope soil, and then expanded by self-stress The interaction between the root pile 1 and the slope soil makes it change from the single force of the ordinary anchor rod or single pile of the slope to the joint force of the root pile and the soil, which improves the anti-sliding performance of the slope; The surface layer of the body is laid with a geomembrane bag 5, and the inside of the geomembrane bag 5 is filled with a film bag filler 6; the geomembrane bag 5 is fixed by fixing the pedestal 2 on the top of the self-stress expansion tree root pile 1; The self-stress expansion tree root piles 1 are equidistantly provided with rigid restraint discs 3 , and the self-stress expansion tree root piles...

Embodiment 2

[0051] The construction method of the variable-section tree root pile and membrane bag concrete combined drainage and greening slope protection structure includes the following steps:

[0052] Step 1, cleaning the slope surface: Before laying the geomembrane bag 5 for construction, first level the surface of the slope to prevent sharp stones from cutting and piercing the membrane bag;

[0053] Step 2, the design of tree root piles: for the design of self-stressed expansion tree root piles 1 with reticular structure to reinforce the slope soil, the arrangement of self-stressed expansion tree root piles 1 must be carried out first, and then the stress mode shall be checked and calculated according to the layout conditions. Calculate and analyze the internal force and external force; the internal force calculation formula is as follows:

[0054]

[0055] Where: F R is the tensile force acting on each tree root pile, in kN; P is the increased resistance to avoid arc sliding, i...

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Abstract

The invention provides a variable cross-section root pile and film bag concrete combined drainage greening slope protection structure and method. Self-stress expansion root piles are buried in a slope soil body, then geomembrane bags are laid on the surface layer of the slope soil body through the interaction of the self-stress expansion root piles and the slope soil body, and the geomembrane bags are filled with membrane bag filler; the geomembrane bags are fixed through a fixing pedestal fixed to the tops of the self-stress expansion root piles; and rigid constraint discs are arranged on the self-stress expansion root piles at equal intervals, and the space between the self-stress expansion root piles is filled with common cement paste and self-stress expansion cement paste. Common root piles are improved into the variable cross-section self-stress expansion root piles, the pulling resistance of the root piles is improved, the film bag concrete technology is combined, a side slope can be greened, rainwater infiltration can be prevented, the rainwater infiltration capacity is greatly reduced, and the stability of the side slope is enhanced.

Description

technical field [0001] The invention belongs to facilities in the field of geotechnical engineering, and in particular relates to a variable-section tree root pile and membrane bag concrete combined drainage and greening slope protection structure and method, which are applied to slope support, geological disaster protection and other projects. Background technique [0002] Tree root piles are similar to friction piles, which can bear both vertical loads and horizontal loads. Pressure grouting can make the outside of the piles closely bonded to the soil to obtain greater bearing capacity. It is often used in foundation underpinning, soft soil foundation reinforcement and other projects, but it is rarely used in slope engineering. The main reason is that the pile diameter of tree root piles is small and cannot provide sufficient pullout resistance. [0003] For slope support treatment, in addition to supporting it, on the other hand, it is also necessary to pay attention to t...

Claims

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Application Information

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IPC IPC(8): E02D17/20E02B3/12
CPCE02D17/20E02D17/202E02D17/207E02B3/12
Inventor 黎照刘杰曾曾王瑞红黄叶宁孙涛杨雨李政石谦郭建祥
Owner CHINA THREE GORGES UNIV
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