【作者】 胡展飞； 张刚； 周健；

【Author】 HU Zhan-fei, ZHANG Gang , ZHOU Jian (Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China)

【机构】 同济大学地下建筑与工程系；

【摘要】 结合深基坑的突水问题进行了室内模型试验研究。通过对试验取得数据的整理, 观测总结了基坑突水前后底部土体的变形特征,认为基底软土层在下伏承压水压力作用下的变形特征类似于粘弹性体的变形特征,具有明显的流变性,其“应变-应力-时间”关系比较符合Merchant流变模型。并给出了基坑底部各个区域的不同水头压力下变形的预测公式。更多还原

【Abstract】 A laboratory model test on water blow - up of the pit is carried out in this paper. The deformation behavior of substratum of the pit before and after water blow- up of the pit is summarized by analysing test datum. Defonnation behavior of the soft soil layer at the bottom of pit under the pressure of confined water is similar to viscoelastic defonnation with Theological character, and the relationship among the stress, strain and time can be represented by the iheology model of Merchant. Based on this, the forecast formulas of displacement under different head pressure of every area at the bottom of pit are given.更多还原