砂与淤泥互层地基中基坑边坡变形特征

以海口市某砂与淤泥互层地基深基坑工程为背景,通过对其施工期间动态监测数据的分析,总结了该深基坑工程的支护结构变形、周边地表沉降变形及水位变化等特征.分析结果表明:支护结构变形主要发生在基坑开挖阶段,最大水平位移位于长边中心处;基坑开挖的影响范围主要集中于0~2 H处(H为基坑开挖深度),最大可延伸至距基坑边缘约为3 H处,产生最大沉降量位置约为支护结构后0.7~0.9 H处;基坑开挖引起的周边水位变化较小,10月份水位变化波动较大,11月后水位比较稳定.

Deformation Characteristics of Foundation Pit Slope in Sand and Mud Interbed Foundation

A sand and mud interbed deep foundation project in Haikou was used as the background,the dynamic monitoring data during the construction period were analyzed and the supporting structure of the deep excavation deformation,surrounding ground surface subsidence and water level changes and other features were summed up. The results indicated that the supporting structure deformation occurs mainly in the excavation phase,the maximum horizontal displacement is located in the center of the long side; affected area is mainly in the 0 ～ 2H range（ H for the excavation depth）,which can be extended to about 3H pit at the edge,the largest settlement position is about 0. 7 ～ 0. 9H behind the supporting structure; the water level has small changes,the fluctuates in October are large while it is relatively stable after November.