关于地下结构浮力计算的若干问题

随着城市地下空间的开发利用,一些在地下水位以下的无上部建筑的地下车库,商城及娱乐商业地下建筑常常需要数量可观的抗浮桩或锚固结构,这就涉及到合理计算地下室浮力的问题。根据阿基米德定律,浮力等于它所排除水体之重量,这在静止地下水位以下的饱和土中也适用。但与此前发生的支护结构上“土水分算”和“土水合算”一样,这也涉及到土中水的形态与土中水的运动问题。是否结构在地下水面以下就要百分之百的计算静水压力及浮力,是值得讨论的。本文就若干情况进行了分析。

Some Problems About the Calculation of Uplift Force on Underground Structures

With the development of underground space, some structures such as underground garages, business areas and recreation centre are found below groundwater level and without super structure over them, therefore considerable amount of anti-uplift piles or anchorages are needed. To calculate reasonably the uplift force of the underground water is a problem to be solved. In this paper some calculation conditions are presented.