地下结构抗浮设防水位和浮力计算刍议

Preliminary discussion on water level for prevention of up-floating and calculation of uplift pressure

大量地下车库、下沉式广场等地下建筑的兴建,使抗浮问题非常突出。针对地下结构设计时抗浮设计水位的确定和水浮力计算问题,分析了地下水赋存状态与渗流特性、基础埋深与地下水层关系,介绍了设防水位的合理选取及水浮力实用计算方法,最后给出了工程算例。

The large scale construction of the underground car parking buildings and subsiding squares in our major cities has made the anti-uplift design a very critical problem.The key is to find the definition of the water level and the appropriate calculation of uplift pressure.The characteristics of the layered ground water conformations and seepage patterns,the relative relationship of the soil layers and the depth of underground structures are analyzed.Based on the experience of projects,the calculation method of water float is proposed.