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Method for reinforcement construction of soft soil foundation by exchange-filling with foam lightweight soil

A technology of foam lightweight soil and construction method, which is applied to roads, roads, buildings, etc., can solve the problems of not being able to meet the requirements of the foundation bearing capacity of underground pipelines at the same time, and troubled the engineering community, so as to suppress uneven settlement and lateral movement. , to ensure safety, to eliminate the effect of post-construction settlement

Active Publication Date: 2014-03-19
CHINA RAILWAY SIXTH GRP CO LTD +1
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Problems solved by technology

However, in some special cases, the specific depth and precise position of some pipelines that have been buried for many years cannot be ascertained, so the above-mentioned conventional construction methods can no longer meet the requirements of the safety of underground pipelines and the bearing capacity of the foundation at the pipeline. Therefore, It has always been a problem that plagues the engineering field in the construction of soft soil foundation reinforcement

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  • Method for reinforcement construction of soft soil foundation by exchange-filling with foam lightweight soil
  • Method for reinforcement construction of soft soil foundation by exchange-filling with foam lightweight soil

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Embodiment Construction

[0016] The soft soil foundation reinforcement construction method provided by the present invention using foam light soil replacement will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] Such as figure 1 , figure 2 As shown, a new railway line 1 in the first section of the subgrade center mileage DK62+488.87 passes through a China Aviation Oil pipeline 2 with a diameter of Φ329.9mm and an angle of 60° with the new railway line 1. The pipeline 2 provided by the owner The approximate buried depth ranges from 7 to 12m. The filling height of the subgrade here is only 1m, and the original design base treatment is a 14m long two-way cement mixing pile. In order to ensure that the safety of the pipeline is not affected during the construction of the cement mixing pile, the position of the pipeline 2 must be accurately located before construction. Due to interference from surrounding high-voltage lines, the exact positi...

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Abstract

The invention discloses a method for reinforcement construction of soft soil foundation by exchange-filling with foam lightweight soil. The method adopts high-strength foam lightweight soil as filler for foundation pits. Due to pumping construction, the construction of a construction road is omitted, the construction floor occupation is small, the construction difficulty is reduced greatly while the construction period is shortened, the post-construction settlement of the filler is eliminated effectively, the additional pressure of foundation to underground pipelines is decreased, the nonuniform settlement and lateral displacement of foundation are suppressed, and the stability of roadbed is improved. Therefore, the method can ensure safety of underground pipelines, but also meet the bearing capacity requirement of foundation.

Description

technical field [0001] The invention belongs to the technical field of railway soft soil foundation reinforcement, in particular to a soft soil foundation reinforcement construction method using foam light soil for filling. Background technique [0002] The reinforcement of railway soft soil foundation is usually carried out by piling method or filling method. Underground obstacles such as national defense optical cables, cables, water pipes, and oil pipelines are often encountered within the construction scope. Therefore, the location of these pipelines must be ascertained before construction. Protect it to prevent it from being damaged by construction machinery. However, in some special cases, the specific depth and precise position of some pipelines that have been buried for many years cannot be ascertained, so the above-mentioned conventional construction methods can no longer meet the requirements of the safety of underground pipelines and the bearing capacity of the fo...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C3/04
Inventor 高宇赵振杰陈磊吕晓杰李绍刚贾建国孙承军李强
Owner CHINA RAILWAY SIXTH GRP CO LTD
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