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Design method for reinforcing pile of expansive soil foundation embankment pile-slab wall

A design method and soil foundation technology, applied in the field of geotechnical engineering, can solve problems such as excessive deformation, instability, and excessive deformation of embankment pile-slab walls, and achieve the effects of avoiding project waste, reliable design data, and good economy

Active Publication Date: 2021-07-09
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a solution to the problem that the design method of the embankment pile-sheet wall in the prior art does not take into account the influence of water softening of the expansive soil foundation, which may cause excessive deformation or instability. A design method for reinforcement piles of embankment pile-sheet walls on expansive soil foundations, which reasonably determines the influence of water softening of expansive soil foundations, and calculates the length of reinforcement piles and cross-sectional dimensions of reinforcement piles required for pile-sheet walls of embankments. According to the reinforcement piles The embankment pile-slab wall completed with the design data can effectively avoid excessive deformation or instability of the embankment pile-slab wall after the expansive soil foundation is soaked and softened

Method used

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  • Design method for reinforcing pile of expansive soil foundation embankment pile-slab wall
  • Design method for reinforcing pile of expansive soil foundation embankment pile-slab wall
  • Design method for reinforcing pile of expansive soil foundation embankment pile-slab wall

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Effect test

Embodiment 1

[0066] A kind of reinforcement pile 11 design method of embankment pile sheet wall 1 of expansive soil foundation 3 described in the present invention, at first through field sampling, and through indoor test, obtain under different conditions, the cohesion force of expansive soil foundation 3, internal friction Angle and foundation horizontal resistance coefficient database, the depth of expansive soil foundation 3 from the ground is divided into layers according to the method of 1m ~ 3m, 3m ~ 5m, 5m ~ 8m and 8m or more, and then determine the cohesion water immersion influence coefficient k 1i , Internal friction angle immersion influence coefficient k 2i , Influence coefficient k of foundation horizontal resistance to water immersion 3i , cohesion compaction influence coefficient ζ 1i , Influence coefficient ζ of internal friction angle compaction 2i , Influence coefficient of cohesion, compaction and water immersion η 1i and internal friction angle compaction water imme...

Embodiment 2

[0097] In this embodiment, the acquisition method of the value range of each coefficient is the same as that of Embodiment 1, and the value of each coefficient is selected within the value range, as figure 1 As shown, the embankment pile-slab wall 1 is used to rectify the slope on the left side of the road. The embankment pile-slab wall 1 includes reinforcement piles 11 and soil retaining panels 12. The inner side of the embankment pile-slab wall 1 has an embankment filling body 2 with a height of 6m. , the width of the embankment surface is 13.6m, the surface layer of the embankment is filled with 0.6m graded crushed stone 21, the bottom of the embankment surface is filled with coarse-grained soil filler 22, the foundation is thick expansive soil, and the expansive soil foundation 3 is based on the distance from the ground 1m~3m, 3m~5m, 5m~8m and more than 8m layering methods are calculated and analyzed; a kind of reinforcement pile 11 design method of expansive soil foundatio...

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Abstract

The invention relates to the technical field of geotechnical engineering, and discloses a design method for a reinforcing pile of an expansive soil foundation embankment pile-slab wall. According to the design method, coefficients are introduced for estimation, the influence of water immersion on expansive soil foundation and the gravity of an embankment filling body is brought into calculation content, and the compaction influence of the expansive soil foundation on the inner side of the embankment pile-slab wall under the gravity action of the embankment filling body and the softening influence of the expansive soil foundation on the inner side and the outer side of the embankment pile-slab wall in a water immersion environment are comprehensively calculated through design data obtained through the design method. According to the embankment pile-slab wall completed according to the design data of the reinforcing pile, the problem that the embankment pile-slab wall is excessively deformed or unstable after the expansive soil foundation is softened by water immersion can be effectively avoided, and the phenomenon of engineering waste caused by excessive use of building materials can be avoided.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a design method for reinforcing piles of embankment pile sheet walls on expansive soil foundations. Background technique [0002] Expansive soil has the characteristics of water absorption expansion, dehydration shrinkage and cracking, repeated expansion and contraction, and sharp attenuation of water-immersion strength; when embankment projects built on expansive soil foundations need to close slopes, embankment pile-sheet walls are widely used, but there are many cases in actual engineering. Cases of excessive deformation of pile-slab walls of embankments and even instability of pile-slab walls of embankments, investigation and analysis found: 1. Under the action of gravity of filling soil, the expansive soil foundation produces concave and uneven foundation settlement. When the filling body is coarse-grained soil , After the coarse-grained soil sinks, due to i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/08E02D33/00E01C3/00E01C3/04E02D5/02E02D29/02G06F30/13
CPCE02D3/08E02D33/00E01C3/00E01C3/04E02D5/02E02D29/02G06F30/13G06F2119/14E02D2600/40
Inventor 姚裕春余雷刘昕张戎令郭建宁刘晋南钱昊陈雅婷黎伟刘浪奇张良
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD