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Foundation treatment method of collapsible loess slope cut-and-fill joint part

A technology for collapsible loess and foundation treatment, which is applied in excavation, filling, soil protection, etc., and can solve the problems of uneven settlement and poor bonding effect at the junction of filling and excavation

Inactive Publication Date: 2015-01-07
XIAN UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a foundation treatment method for the filling and excavation junction of collapsible loess slopes in view of the above-mentioned deficiencies in the prior art. Existing collapsible loess slopes have problems such as poor combination effect between excavation and filling, and uneven settlement at the junction of filling and excavation.

Method used

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  • Foundation treatment method of collapsible loess slope cut-and-fill joint part
  • Foundation treatment method of collapsible loess slope cut-and-fill joint part
  • Foundation treatment method of collapsible loess slope cut-and-fill joint part

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Embodiment Construction

[0073] like figure 1 A method for foundation treatment of the excavation and filling junction of a collapsible loess slope is shown. From top to bottom, M filling and excavation layers are used to perform foundation treatment on the excavation and filling junction of the constructed slope 1, and the M excavation and filling layers The foundation treatment methods of the layers are all the same; wherein, M is a positive integer and M≥3; the layer thickness of the M filling and excavation layers is not more than 1m; the filling and excavation layer at the bottom of the M filling and excavation layers is Dig the bottom layer; the slope 1 constructed is a collapsible loess slope, and the slope 1 constructed is excavated to form a step comprising M steps 2, the M steps 2 are arranged from bottom to top, and the M steps 2 The height of the kick surface is the same as the layer thickness of the M filling and excavation layers respectively, and the arrangement positions of the M steps...

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Abstract

The invention discloses a foundation treatment method of a collapsible loess slope cut-and-fill joint part. The cut-and-fill joint part of a constructed slope is subjected to foundation treatment by M cut-and-fill layers from top to bottom, and a cut-and-fill layer at the bottom of the M cut-and-fill layers is a bottom cut-and-fill layer. The foundation treatment method of the collapsible loess slope cut-and-fill joint part includes a bottom cut-and-fill layer foundation treatment step, a last cut-and-fill layer foundation treatment step and a once or twice repeating step. The bottom cut-and-fill layer foundation treatment step includes excavating a cut step, treating a soft cut foundation and a fill foundation, building a fill area soil body and constructing the cut-and-fill joint part, wherein the construction process of the cut-and-fill joint part includes mounting a geogrid and constructing a rigid connection framework. The once or twice repeating step includes repeating the former two steps until the foundation treatment process of the M cut-and-fill layers is completed. The foundation treatment method is simple in steps, convenient to implement, good in foundation treatment effect and capable of solving the problem that joint effect of cutting and filling of the existing collapsible loess slope cut-and-fill joint part is poor and differential settlement of the cut-and-fill joint part is easy to cause and the like.

Description

technical field [0001] The invention relates to a foundation treatment method, in particular to a foundation treatment method for a collapsible loess slope filling and excavation junction. Background technique [0002] Since April 2012, Yan'an, Shaanxi Province has invested hundreds of billions of dollars to "cut mountains, fill ditches, build land, and build cities" in an unconventional way. It took 10 years to sort out 78.5 square kilometers and build them in the gully area around Yan'an city A new city twice the size of the current urban area. The Yan'an "Cutting Mountains to Build a City" project is currently the largest geotechnical project in Asia and even the world in the collapsible loess area, and it is also the first case in the history of city construction in the world. Collapsible loess refers to the loess that undergoes significant additional deformation due to the structural damage of the soil after soaking under the action of the self-weight stress of the ove...

Claims

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Application Information

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IPC IPC(8): E02D17/00E02D17/18E02D3/00E02D3/046
CPCE02D3/00E02D3/005E02D3/046E02D5/46E02D17/02E02D17/18E02D2250/0023E02D2300/0084E02D2600/40
Inventor 叶万军王根龙杨更社董西好
Owner XIAN UNIV OF SCI & TECH
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