水库大坝工程深基坑支护安全性的有限元分析  

Finite Element Analysis on Safety of Deep Foundation Pit Support in Reservoir Dam Engineering

作　　者：杨莹 YANG Ying(Xinjiang Water Resources and Hydropower Survey Design and Research Institute,Urumqi 830000,China)

机构地区：[1]新疆水利水电勘测设计研究院,乌鲁木齐830000

出　　处：《水利科技与经济》2021年第8期59-62,69,共5页Water Conservancy Science and Technology and Economy

摘　　要：目前,在工程基坑支护安全性有限元分析中,对基坑土体和支护架之间存在互斥性考虑不足,影响分析结果的准确性,因此提出水库大坝工程深基坑支护安全性的有限元分析研究。首先采用物元描述对基坑和支护之间的互斥性进行分析,然后给出有限元模拟计算方法来计算开挖过程中的参数变化,最后根据模拟出的有限元结果进行有限元折减,计算其中的安全系数,完成分析。为了验证所设计的有限元分析方法的可行性,设计实验,使用某地水库大坝工程深基坑支护在工程中的实际数据,将所使用的设计分析方法与文献[1]、文献[7]及文献[9]中的有限元分析得出的影响安全性数值进行比较,并对比其准确度。实验结果证明,所设计的有限元分析方法得出的影响安全性数值更接近实际结果,证明设计分析方法具有较高的准确性。In the current finite element analysis of the safety of foundation pit support,the mutual exclusion between foundation pit soil and support frame is not considered enough,which affects the accuracy of the analysis results.Therefore,the finite element analysis on the safety of deep foundation pit support of reservoir dam engineering is proposed.Firstly,the matter-element description is used to describe the mutual exclusion between the foundation pit and the support,and then the finite element simulation method is given to calculate the parameter changes in the excavation process.Finally,according to the simulated finite element results,the finite element reduction is carried out,and the safety factor is calculated to complete the analysis.In order to verify the feasibility of the designed finite element analysis method,the actual data of deep foundation pit support in a reservoir dam project are used in the design experiment,and the design analysis method and the finite element analysis in literature[1],literature[7]and literature[9]are used to get the values that affect the safety,and the accuracy is compared.The experimental results show that the safety values obtained by the designed finite element analysis method are closer to the actual results,which proves that the design analysis method has high accuracy.

关 键 词：基坑支护 物元描述 有限元模拟 互斥性 有限元折减 

分 类 号：TV551.4[水利工程—水利水电工程]