上海博物馆基坑围护结构的受力与变形

Mechanical Behaviour of the Support System of Shanghai Museum Foundation Pit

本文介绍了上海博物馆基坑围护结构的设计、施工与现场观测结果，探讨了复合形重力式坝体结构所承受的水、土压力，开挖过程中坝体产生的沉降与挠曲，以及降水对提高基坑稳定性等问题。

As a case history, this paper introduces the design, construction and field observation of Shanghai Museum foundation pit, which is 135. 5m long, 90. sin wide, and 9m deep. The support system is a combined type of gravity retaining wall Which is constisted of Φ700 bore hole cast-in-place piles and cement mixing soil piles. Based on the obserbation data, the mechanical behaviour of the support structure, such as the earth pressure and pore pressure variation, the settlement and inclination of piles, and the positve effects of de-watering on the pit stability,is discussed. The conclusions obtained can be referred to in the design and construction of deep foundation in saturated soft clay.