And foundation pit excavation for piles in marine deposit current-formed silt usually have problems such as the inburst of the surrounding silt,displacement and breaking of the piles etc.

• 宁波市镇海污水处理厂位于海滨滩涂地,在海相沉积流塑状淤泥中进行建(构)筑物管桩基础基坑开挖施工,极易出现基坑周边淤泥涌入、开挖过程中管桩偏移和断裂等问题,施工过程中对此控制要求较高、控制难度较大。