四川水力发电2024，Vol.43Issue(1)：116-122,7.
富水砂层大直径深竖井开挖稳定性有限元分析
Finite Element Analysis of Excavation Stability of Large-diameter Deep Shaft in the Water-Rich Sand Layer
周巾森 1肖明砾 1谢红强 1何江达 1裴建良1
作者信息
- 1. 四川大学 水力学与山区河流开发保护国家重点实验室,四川 成都 610065||四川大学 水利水电学院,四川 成都 610065
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摘要
Abstract
A shield receiving shaft of a water conveyance tunnel has the characteristics of large excavation diam-eter,depth and high water level in sand layer,which puts forward higher requirements for the stress and de-formation of the shaft structure during the excavation.In this paper,the construction process of this shaft is simulated by finite element analysis and the displacement and stress laws of underground diaphragm wall and the stratum of the shaft during the excavation process are studied.The analysis results show that after the shaft excavation is completed,the maximum surface uplift is 39.50 mm,which appears near the wellhead;the maximum stratigraphic uplift is 41.60 mm,which appears in the bottom hole formation;the maximum hori-zontal displacement of the underground diaphragm wall is 2.79 mm,which appears at the top of the shaft.The calculated value of the horizontal displacement at the top of the underground diaphragm wall is in good agree-ment with the measured value.The maximum tensile stress of the underground diaphragm wall is 1.13 MPa,which doesn't exceed the standard tensile strength of the concrete,indicating that the excavation stability of the shield receiving shaft is good.The analysis method and results in this paper can be used as reference for similar projects.关键词
富水砂层/竖井开挖/地下连续墙/数值模拟Key words
Water-rich sand layer/Shaft excavation/Underground diaphragm wall/Numerical simulation分类
建筑与水利引用本文复制引用
周巾森,肖明砾,谢红强,何江达,裴建良..富水砂层大直径深竖井开挖稳定性有限元分析[J].四川水力发电,2024,43(1):116-122,7.
