The Influence of Foundation Pit Excavation on Deformation of Adjacent Underground Pipelines and Control Measures
[1]GAO Xinjun,DUAN Penghui,WANG Lei.The Influence of Foundation Pit Excavation on Deformation of Adjacent Underground Pipelines and Control Measures[J].Journal of Zhengzhou University (Engineering Science),2020,41(05):66-71.[doi:10.13705/j.issn.1671-6833.2020.03.015]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
41
Number of periods:
2020 05
Page number:
66-71
Column:
Public date:
2020-10-01
- Title:
- The Influence of Foundation Pit Excavation on Deformation of Adjacent Underground Pipelines and Control Measures
- Keywords:
- foundation pit excavation; three-dimensional finite element; deformation; underground pipeline; reinforcement measures
- CLC:
- -
- DOI:
- 10.13705/j.issn.1671-6833.2020.03.015
- 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 the evaluation 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 pipeline. The combined method could control the horizontal and vertical deformation of the pipeline well, which was a more effective method.
- References:
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Last Update:
2020-10-23