摘要
土压平衡盾构维持开挖面稳定的关键是土舱内的压力和地层水土压力平衡。为获得便于工程应用的计算极限支护力的方法,针对极限支护力的影响因素及确定进行总结。通过总结国内外学者关于开挖面稳定性分析的成果,从本构模型选择、土体失稳模式、渗流作用及极限支护力的确定展开研究。研究得出本构模型对开挖面失稳区域有影响;通过对前人研究的结果分析,证实了数值模拟方法进行隧道开挖面稳定性分析的可行性,目前数值模拟方法多用于定性的评价,需从本构模型、参数选择等维度进一步提高数值模拟结果精度。分析结果为完善开挖面稳性数值模拟提供了有益方向。
The key of soil pressure equilibrium of the shield to maintain the stability of excavation surface is the balance of pressure in soil tank and soil pressure in the formation water.In order to obtain a method for calculating the ultimate support force convenient for engineering application,it is necessary to summarize the influencing factors and determination of the ultimate support force.By summarizing the publications on the stability analysis of excavation face,this paper studies the selection of constitutive model,soil instability mode,the influence of seepage on the stability analysis of excavation face,and the determination of ultimate support force.It is concluded that the constitutive model has an influence on the instability area of the excavation surface.By analyzing the results of previous studies,it is confirmed that the numerical simulation method is feasible to analyze the stability of tunnel excavation surface.At present,numerical simulation methods are mostly used for qualitative evaluation,and the accuracy of numerical simulation results needs to be further improved from the dimensions of constitutive model and parameter selection.The analysis results may provide a useful direction for improving the numerical simulation of excavation surface stability.
作者
张世民
舒营
尹鑫晟
杨桦
宋翔
ZHANG Shimin;SHU Ying;YIN Xinsheng;YANG hua;SONG xiang(School of Civil Engineering and Architecture,Anhui University of Science and Technology,Anhui Huainan 232001,China;Department of Civil Engineering,Zhejiang University City College,Hangzhou 310015,China;Zhejiang Construction Engineering Quality Inspection Station Limited Company,Hangzhou 310000,China)
出处
《低温建筑技术》
2022年第4期125-129,共5页
Low Temperature Architecture Technology
基金
国家自然科学基金青年科学基金项目(51808493)
浙江省自然科学基金(LY21E080004)
杭州市科技局规划项目(20201203B125)
浙江省住建厅科研项目(2020K074)。
关键词
开挖面稳定性
本构模型
失稳模式
渗流力
极限支护力
stability of excavation face
constitutive model
instability mode
seepage force
ultimate support force
