Dewatering is always necessary in foundation pit excavation and hand dig piles. 基坑开挖或施行人工挖孔桩常常需要进行人工降水。
Diaphragm walls are commonly used as retaining structures in many deep foundation pits, especially when the environment protection is severer. 摘要地下连续墙刚度大，变形小，作为基坑开挖阶段的围护结构可有效的保护周边环境。
