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本工程地层主要为第四系全新统及上更新统海相及海陆交汇地层,地层土物理力学性能指标相差较大,结合实际施工情况,选用梅耶霍夫经验公式法对地下连续墙成槽过程中的槽壁稳定行加以分析,可知护壁泥浆的液面高度、容重是控制泥浆护壁槽段稳定性的关键控制参数;槽段的整体稳定性主要受槽壁而非槽底的稳定性所支配,浅层失稳是泥浆护壁槽段的主要失稳形式。
The main strata of this project are the Quaternary Holocene and Upper Pleistocene marine and intercontinental sea-land formations, and the physical and mechanical properties of the stratigraphic soil differ greatly. According to the actual construction conditions, the Meyerhof empirical formula method is used to determine the underground continuous wall The stability of tank wall is analyzed. It can be seen that the liquid level and bulk density of protective mud are the key control parameters to control the stability of slurry tank wall. The overall stability of tank section is dominated by the stability of tank wall rather than tank bottom , Shallow instability is the main failure mode of mud retaining wall trough.