富水非均质土层地下连续墙槽壁稳定性分析  

Analysis on the Stability of Slurry Trench in Water-Rich Heterogeneous Soil

作　　者：冯悦海 李彦霖 姚爱军[2] Feng Yuehai;Li Yanlin;Yao Aijun

机构地区：[1]中铁建设集团有限公司 [2]北京工业大学城市建设学部

出　　处：《城市建筑》2022年第5期192-194,198,共4页Urbanism and Architecture

摘　　要：本文依托北京城市副中心综合交通枢纽的基坑工程,对其地下连续墙沟槽的槽壁稳定性问题进行了分析。通过理论计算与数值模拟的方法,探讨了该工程在所处地层条件下,地下连续墙单幅开挖长6 m,深53 m的沟槽槽壁的稳定性问题。采用非均质土分层独立稳定性验算方法,计算得出非均质土层中不同位置土层具有不一致的安全储备。在该工程的地质条件下,顶端土层稳定性较差,中间土层因软硬交错的原因会出现安全系数交替下降的现象。类比该工程的地下连续墙沟槽开挖方法,使用有限元软件进行模拟,还原了单幅地下连续墙的开挖过程,并对成槽后的槽壁侧移进行了分析。Based on the foundation pit project of the comprehensive transportation hub of Beijing Sub-center,this paper analyzes the stability of the slurry trench.Through theoretical analysis and numerical simulation methods,the stability of the slurry trench with a length of 6m and a depth of 53m under the stratum conditions of Beijing Sub-center was discussed in this paper.The calculation method of independent stability of heterogeneous soil layers is adopted,and it is concluded that in heterogeneous soil,different layers of soil have inconsistent safety reserves.Under the geological conditions of the project,the stability of the top soil layer is poor,and the safety factor of the middle soil layer will alternately decrease due to the interlacing of soft and hard layers.By analogy to the trench excavation method of the slurry trench in this project,finite element software was used to simulate the construction process of this project and to restore the excavation process for a single ground continuous wall.After the trench is formed,the lateral displacement of the groove wall is analyzed.

关 键 词：富水地层 地下连续墙 槽壁稳定性 稳定性分层计算 

分 类 号：TU921[建筑科学—建筑设计及理论]