地下连续墙施工过程中泥浆护壁对槽壁稳定性的影响分析

针对地下连续墙泥浆护壁成槽施工和混凝土浇筑过程中的槽壁稳定性与变形问题,采用三维有限元数值分析法,分析了地下连续墙施工中土体受力与变形的机理;同时研究了护壁泥浆液面下降幅值导致周围土层向槽壁内侧涌动加剧程度及地层沉降的增幅.重点分析了由于补浆不及时对槽壁周围环境的影响,为地下连续墙设计与施工提供科学的理论依据及指导.

Analysis of Impact of Slurry Retaining Support on Trench Wall Stability in Process of Diaphragm Wall Construction

Regarding the trench wall stablility and the deformation problem during the trench forming and the concrete pouring of the slurry retaining support diaghragm wall, 3D finite element numerical analysis method was used to analyze the stress on soil layer and the deformation mechanism during the diaphragm wall construction. Besides, the paper studies the aggravation of the surrounding soil surging to the inner-side trench wall and the increasement of the stratum settlement both caused by the decline of the slurry level. The paper mainly analyzes the influence on surroundings of the trench wall caused by late slurry replenishment, which can provide scientific theory basis and guidance for diaphragm wall design and construction.