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Construction method for improving bearing capacity of collapsible loess field foundation

A technology of foundation bearing capacity and collapsible loess, which is applied in soil protection, infrastructure engineering, construction, etc., can solve the problems of complex influence of engineering foundation treatment, inability to meet building needs, low bearing capacity, etc., to meet the needs of engineering Building requirements, simplifying the form of foundation treatment, and improving the effect of foundation bearing capacity

Inactive Publication Date: 2016-06-29
LUOYANG URBAN PLANNING & ARCHITECTURE DESIGN RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual engineering, the bearing capacity of lime-soil compaction piles and soil compaction pile composite foundations is too small to meet the needs of construction, and multi-pile composite foundations are often used for processing
As a result, it has a negative impact on the complexity of engineering foundation treatment in collapsible loess areas

Method used

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Embodiment Construction

[0015] The principles and features of the present invention will be described below, and the examples given are only used to explain the present invention, not to limit the scope of the present invention.

[0016] Take the construction environment where the construction site is located in a non-weight collapsible loess area, with a 7.0-meter non-weight collapsible loess layer under the base, a collapsibility coefficient of 0.020 to 0.022, and the design requires an average base load of 360kPa as an example.

[0017] A construction method for improving the bearing capacity of the collapsible loess site. Step one is to use percussion drilling to form a pile hole with a diameter of 350mm; Step two is to fill the pile hole with a mixture of cement and soil in sections, (cement It is ordinary Portland cement, and the soil is silty clay with a 10-20mm sieve and an organic content of not more than 5%. The two are mixed at a ratio of 6:1 to form a mixture. Each cubic soil is mixed with ceme...

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Abstract

The invention belongs to the field of civil engineering foundations, and specifically relates to a construction method for improving the bearing capacity of a collapsible loess site foundation, which is characterized in that it includes the following steps: step 1, drilling pile holes; The sections are filled with the mixture of cement and soil, and tamped into sections to form soil-squeezing piles. The beneficial effect is that the soil collapsibility of the foundation soil can be eliminated by the compaction effect of the soil compaction pile formed by the mixture of cement and soil on the soil around the pile, and at the same time, the bearing capacity of the foundation of the collapsible loess site can be improved, which is simple and convenient. Reliable, it greatly simplifies the commonly used foundation treatment forms, and meets the needs of engineering construction.

Description

Technical field [0001] The invention belongs to the field of civil construction foundations, in particular to a construction method for improving the foundation bearing capacity of collapsible loess sites. Background technique [0002] In the northwestern part of my country, there is a large-scale distribution of collapsible loess. During the construction of the project, foundation treatment must be carried out in accordance with relevant standards to completely or partially eliminate the collapsibility of the foundation to improve its bearing capacity and water stability. The commonly used method is to use lime-soil compaction piles and soil compaction piles to strengthen the foundation. [0003] According to the requirements of the code, the characteristic value of the bearing capacity of the lime-soil compacted pile composite foundation should not be greater than 2.0 times that before treatment, and should not be greater than 250kPa. In actual engineering, the bearing capacity ...

Claims

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Application Information

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IPC IPC(8): E02D3/12
CPCE02D3/123E02D2300/0039
Inventor 郭营杜延华陈延辉刘书鹏李明玉林琼
Owner LUOYANG URBAN PLANNING & ARCHITECTURE DESIGN RES INST CO LTD
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