水土压力统一计算理论的证明及水土共同作用下的压力计算

VERIFICATION OF UNIFIED CALCULATION THEORY OF WATER AND EARTH PRESSURES AND CALCULATION OF PRESSURE UNDER INTERACTION OF WATER AND EARTH

为解决水土压力合算和分算的争议,从理论上证明水土合算在某些情况下的合理性,有必要建立能够把水土分算与合算统一在一个理论框架下的统一算法。采用理想模型试验建立一个水土压力统一计算理论,同时,证明了统一计算理论的科学性。以理想模型试验为基础,提出一个新的可以应用于水土压力分算与合算统一算法的强度理论。算例分析表明,新的统一算法计算结果与相关算法略有差异。该算法既可以在砂土时水土分算,也可以在黏土时水土合算;并且,可以实现黏质粉土和粉质黏土等半透水土层的水土压力计算,为地下构筑物所承受的荷载计算提供理论基础。

For resolving controversy of separate and combined calculation of water and earth pressures and theoretically proving that combined calculation of water and earth pressure is reasonable under some circumstances,it is necessary to establish a unified algorithm that is able to integrate separate and combined calculations in a theoretical framework.This paper establishes a unified calculation theory of water and earth pressures through the ideal model test and verifies its scientificity at the same time.Based on the ideal model test,a new strength theory is proposed that can be applied to the unified algorithm.From the calculation example we can see slight differences between the results of new and traditional methods.This new unified algorithm can be used to calculate water and earth pressures separately for sand and change to combined calculation for clay.Moreover,this can also be applied to calculate the water and earth pressures for aquitard strata like clayey silt and silty clay.It provides a theoretical basis for the calculation of load on underground structures.