统一强度理论在挡土墙土压力计算中的应用

运用统一强度理论和能量理论，导出了按能量理论计算挡土墙主、被动土压力系数及土压力的公式，这些公式可以灵活地适用于各种不同特性填土材料土压力的计算．对不同权系数下的土压力计算结果的比较表明：已有的Mohr-Coulomb解仅为文中解的特例，主动土压力统一解小于Mohr-Coulomb解，而被动土压力统一解大于Mohr-Coulomb解．应用统一强度理论解可以更好地发挥填土材料的强度潜力，并获得明显的经济效益．

Unified Strength Theory with Applications to Earth Pressure

The formulas of the active and passive earth pressure and the corresponding coefficients were derived based on the energy theory and twin-shear united strength theory,which is flexibly applied to evaluate the earth pressure of retaining wall filled with different soil materials.Comparing the results for different weighted coefficients of the earth pressure with the traditional solutions from Mohr-Coulomb's strength theory,the conclusion shows that the Mohr-Coulomb's solution in the current literatures is only a special case of the unified solutions,the active earth pressure is lower and the passive earth pressure higher than that of the latter.The potential strength of filling materials is sufficiently developed under the guidance of the united strength theory.