论有效应力原理与土骨架浮力、渗透力的计算

On the Principle of Effective Stress and the CalCulation of Buoyancy and Permeability of Soil Skeleton

根据饱和土水平截面上孔隙水通道面积与给水度之间的关系推导出孔隙水通道面积计算公式,通过力平衡原理,优化和修正了有效应力原理公式,实现了水土压力的统一计算。同时分析出饱和土土骨架所受浮力值为0。采用同样推导方法,推导出饱和土渗流条件下的渗透力计算公式,渗透力计算中竖直渗流与水平渗流渗透力计算公式有所不同,渗透力与水容重、水力坡度和给水度成正比。希望能对理论土力学水土压力和土骨架浮力、渗透力计算有所帮助。

According to the relationship between pore water channel area and water yield on the horizontal section of saturated soil,the calculation formula of pore water channel area is deduced.Through the principle of force balance,the formula of effective stress principle is optimized and modified,and the unified calculation of water and soil pressure is realized.At the same time,it is analyzed that the buoyancy value of saturated soil skeleton is 0.Using the same derivation method,the calculation formula of seepage force under the condition of saturated soil seepage is derived.In the calculation of seepage force,the calculation formula of seepage force of vertical seepage and horizontal seepage is different,and the seepage force is directly proportional to water bulk density,hydraulic gradient and water yield.It is hoped that it can be helpful to the calculation of water and soil pressure,buoyancy and permeability of soil skeleton in theoretical soil mechanics.