【摘要】 关于在黏土地基上的建筑物所受浮力能否折减问题受到很多专家学者争论。通过室内模型试验,对黏土地基渗水引起的建筑物基底浮力折减问题进行了研究。发现渗流流经地基后作用于地基与建筑物基底接触面形成的浮力,是可以折减的,并且渗透压传递较慢。而渗流直接作用于地基与建筑物基底接触面时,浮力是不能折减的,渗透压传递较快。在浮力存在折减工况下,同一渗流水位时,理论浮力>孔隙水压力>实际浮力,发现折减系数随着渗流水位的升高逐渐增大,但当渗流水位增大至16cm后,折减系数最终稳定在0.63~0.66之间。试验结果对黏土地基抗浮设计实际工程具有重要参考意义。更多还原

【Abstract】 The problem of buoyancy reduction of the building on clay foundation was disputed by many experts and scholars. Through the indoor model test,the reduction of the buoyancy of the substrate caused by the permeability of clay foundation is studied. The study indicates that when the seepage flows through the foundation and acts on the interface between the foundation and the building substrate,the buoyancy can be reduced and the osmotic pressure transfers slowly. But when the seepage directly acts on the interface between the foundation and the building substrate,the buoyancy can not be reduced and the osmotic pressure transfers quickly. In the conditions of the buoyancy can be reduced and in the same seepage water level,the theoretical buoyancy > the pore water pressure > the actual buoyancy. The reduction coefficient increases with the increase of seepage water level. But When the seepage water level increased to 16 cm,the reduction coefficient is maintained between 0. 63 to 0. 66. The test result has important guiding significance for the practical engineering of anti-floating design of clay foundation.更多还原