新饱和土有效应力原理下的地下建筑浮力计算  

Discussion on buoyancy calculation of underground buildings based on effective stress principle of new saturated soil

作　　者：王国义 Wang Guoyi(PowerChina Chengdu Construction Investment Co.,Ltd.,Chengdu 610212,China)

机构地区：[1]中电建成都建设投资有限公司,四川成都610212

出　　处：《山西建筑》2021年第6期62-64,共3页Shanxi Architecture

摘　　要：通过引入岩土给水度参数,推导出新饱和土有效应力原理,实现水土压力分算与合算的统一计算。通过力的平衡原理和新饱和土有效应力原理,从理论上推导出饱和岩土浮力计算公式并定义了岩土浮力系数。通过分析地下建筑受力情况,确定了地下建筑浮力统一计算公式。地下建筑所受浮力是在阿基米德定律上的折减,折减系数只与给水度参数有关,折减系数值与新饱和土有效应力原理中的中和应力系数相等。同时对以前推导新饱和土有效应力原理过程中不恰当的说法进行了更正,希望能对理论土力学的发展和地下建筑浮力计算有所帮助。By introducing the parameters of water yield of rock and soil,the effective stress principle of new saturated soil is deduced,and the unified calculation of water and soil pressure is realized.Based on the principle of force balance and the principle of new effective stress of saturated soil,the formula for calculating the buoyancy of saturated soil is deduced theoretically,and the buoyancy coefficient of saturated soil is defined.By analyzing the stress of underground buildings,the unified calculation formula of buoyancy of underground buildings is determined.The buoyancy of underground buildings is reduced according to Archimedes’law.The reduction coefficient is only related to the water yield parameter.The value of reduction coefficient is equal to the neutralization stress coefficient in the effective stress principle of new saturated soil.At the same time,the author corrects the improper statement in the process of deriving the new effective stress principle of saturated soil.It is hoped to be helpful to the development of theoretical soil mechanics and the calculation of buoyancy of underground buildings.

关 键 词：岩土浮力计算 阿基米德定律 折减系数 中和应力系数 

分 类 号：TU943.1[建筑科学—建筑技术科学]