Method and drainage structure for preventing and treating collapsible loess subsidence

A technology of collapsible loess and waterproof materials, which is applied in the field of methods and drainage structures, and the prevention and control of collapsible loess subsidence. It can solve problems such as large noise and vibration, limited reinforcement effect, and difficult compaction in deep layers.

Inactive Publication Date: 2019-09-13
上海斐晟企业管理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the soil pile is rammed, there will be greater noise and vibration, and it cannot be used when there are buildings around
[0006] 3. The dynamic tamping method has similar disadvantages to the compaction pile method. When tamping, only the dynamic longitudinal surface layer is compacted; due to the difference between the effective area and the affected area, it is difficult to achieve the effect of compaction in the deep layer, and the reinforcement effect is limited.

Method used

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  • Method and drainage structure for preventing and treating collapsible loess subsidence
  • Method and drainage structure for preventing and treating collapsible loess subsidence
  • Method and drainage structure for preventing and treating collapsible loess subsidence

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Experimental program
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Embodiment 1

[0038] Such as figure 1 and figure 2 As shown, this embodiment mainly focuses on the anti-seepage and waterproof of the outdoor site of the building. First of all, within the construction scope of the outdoor site, the ground elevation is about 1.5-2 meters below to determine the work site, and the sub-bearing layer of the work site is replaced with 300-500mm thick and 93% dense replacement soil 1 to strengthen the foundation , improve bearing capacity. A reinforced concrete wall 6 is arranged on the side of the work site, and the bottom of the reinforced concrete wall 6 can extend below the replacement soil layer, or can be directly built on the replacement soil layer. In this embodiment, the filling soil 1 is notoginseng ash soil, and the volume ratio of quicklime to plain soil is 3:7. The filling soil 1 itself has a certain function of waterproofing and strengthening the foundation. The immature quicklime absorbs water when it meets water, which reduces the water conten...

Embodiment 2

[0045] The present invention also provides a method for preventing the subsidence of collapsible loess, comprising the following steps:

[0046] Step S101: according to the ground elevation, determine the working site downwards into the self-weight collapsible loess layer;

[0047] Step S102: laying replacement soil on the lower bearing layer of the work site;

[0048] Step S103: laying a waterproof material on the replacement soil, preferably an anti-seepage waterproof geotextile;

[0049] Step S104: horizontally laying a permeable blind pipe on the waterproof material. The permeable blind pipe includes a permeable main pipe and a plurality of permeable branch pipes connected to the permeable main pipe. The permeable main pipe is connected to the rainwater well, and the permeable branch pipe and the permeable main pipe are laid vertically or obliquely;

[0050] Step S105: After laying the permeable blind pipe, backfill the working site to the ground level.

[0051] The work...

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Abstract

The invention discloses a method and drainage structure for preventing and treatingcollapsible loess subsidence, and relates to the field of construction. The method comprises the following steps thata working site isdetermined according to a ground elevation; replacement filling soil ispaved on a lower bearing layer of the working site and the replacement filling soil iscompacted; a waterproof material is paved on the replacement soil; water-permeable blind pipesare paved transversely on the waterproof material; and after the water-permeable blind pipesarepaved, the working site is backfilled to the ground elevation. According to the method and drainage structure, during construction, the constructioncan be divided into block flow insertion work, the cross work in the construction iseliminatedcompared with a conventional method, the processes aresimplified, the construction period isshortened, and the method and drainage structure are especially suitable for a thick collapsible loessarea.

Description

technical field [0001] The invention relates to the field of construction, in particular to a method and a drainage structure for preventing and controlling the subsidence of collapsible loess. Background technique [0002] Collapsible loess is a kind of unsaturated under-pressure dense soil, which has a certain structural strength under natural humidity, but when it is soaked in water, its strength will be significantly reduced and collapsible deformation will occur. Collapsible loess can be divided into self-weight collapsible loess and non-self-weight collapsible loess. Non-self-weight collapsible loess needs to be under a certain additional pressure before collapsing; self-weight collapsible loess refers to the soil body in the Under the self-weight stress of the overlying soil layer, or under the combined action of self-weight stress and additional stress, significant additional deformation occurs due to structural damage when encountering water, and collapsibility defo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/00E02D3/10E02D31/02E03F5/04
CPCE02D3/00E02D3/10E02D31/02E03F5/04
Inventor 陈恒源王小明
Owner 上海斐晟企业管理有限公司
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