[1]郜新军,段鹏辉,王磊.基坑开挖对邻近管线变形影响及控制措施研究[J].郑州大学学报(工学版),2020,41(05):66-71.
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基坑开挖对邻近管线变形影响及控制措施研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
41
期数:
2020年05期
页码:
66-71
栏目:
出版日期:
2020-10-01

文章信息/Info

Title:
The Influence of Foundation Pit Excavation on Deformation of Adjacent Underground Pipelines and Control Measures
作者:
郜新军段鹏辉王磊
文献标志码:
A
摘要:
为了探明基坑开挖引起的邻近地下管线的附加变形 ,依托实际工程,基于有限元分析方法,建立了基坑及邻近管线的三维整体数值模型,分析了深基坑开挖过程中邻近管线的位移变化规律并对其安全性进行了评价;基于评价结果,提出了注浆法、微型桩法及二者联合的3种管线加固措施,并对比分析了3种加固措施的加固效果。结果表明:随着开挖深度的不断加深,管线的水平位移和竖向位移的最大值也在不断增大,两者均出现在管线的中间位置;注浆法加固通过增大注浆区域宽度的大小,对管线水平位移有很好的抑制作用,对管线竖向位移影响很小;微型桩法对管线竖向位移有很好的抑制作用,对管线水平位移基本没有影响;而二者联合的方法可很好控制管线的水平及竖向位移,是一种较为有效的加固方法。
Abstract:
Foundation pit excavation could lead to additional deformation of adjacent underground pipelines.Based on the finite element analysis method, a three-dimensional numerical model of foundation pit and adjacent pipelines was established by relying on actual engineering; and the law of displacement changes was analyzed and the safety was evaluated in adjacent pipelines during deep foundation pit excavation. Based on theevaluation results, the reinforcement measures and effects of grouting method, micro-pile method and their combined methods were proposed and compared. The results showed that the maximum horizontal displacement and vertical displacement of the pipeline were also increased with the deepening of the excavation depth,which appeared in the middle of the pipeline. The size of the pipeline had a good inhibitory effect on the horizontal displacement of the pipeline, and had little effect on the vertical displacement of the pipeline when grouting reinforcement increased the width of the grouting zone. The micro-pile method has a good inhibitory effect on the vertical displacement of the pipeline, and had no effect on the horizontal displacement of the pipe-line. The combined method could control the horizontal and vertical deformation of the pipeline well, which was a more effective method.
更新日期/Last Update: 2020-10-23