护壁泥浆的不同沉淀阶段对防渗墙槽壁稳定性的影响

Study on Influence of Slurry Precipitation to the Stability of Trench Wall

以新疆石门水库防渗墙施工最深槽段为研究对象,采用有限元分析软件ABAQUS建立深覆盖层防渗墙开挖过程中的槽孔有限元数值模型,模拟护壁泥浆的不同沉淀阶段对槽壁稳定性的影响。验证结果表明,随着泥浆沉淀的进行,槽壁四周的土体单元稳定安全系数在逐渐减小,槽壁土体位移也随着泥浆沉淀的进行而逐渐增大,即槽壁稳定性变差,为以后工程设计和施工提供更可靠的理论依据。

Taken the cutoff wall in the deep groove sectionof Shimen Reservoir in Xinjiang Construction as the research object, the finite element analysis software ABAQUS is applied to establish deep cover layer of impermeable wall excavation process of slot finite element numerical model to simulate the effect of different precipitation stages of mud on the trench wall stability. The results show that： as the precipitation process going, the stability is decreasing, and the soil displacement is larger, which means the stability is worse. The study is of greater value for future engineering design and construction.