中文摘要：

采用双剪统一强度理论，导出了克列恩法土压力空间计算理论的双剪统一解，空间土压力随统一强度理论参数b值的增大而减小．所给出的解可以灵活适用于各种不同特性材料空间土压力的计算．应用双剪统一强度参数公式可以求算不同b值所对应的土体的强度参数，该值同时包含了主应力σ1、σ2和σ3对材料强度的贡献，并可将与平面问题对应的常规土工试验方法所测得的强度指标c0、φ0换算为空间问题所需的强度指标ci、φi,统一解可以更好地发挥挡土墙填料的强度潜力，工程应用可获得明显的经济效益．

英文摘要：

The twin-shear unified strength theory is used,the formula of the Space earth Pressure computing theory are derived,and the Space earth Pressure is changed with the coefficient b becoming greater. The solutions given can be used to caculate the space earth pressure witl kinds of different special property materials. The strength parameter of soil can be caculated by formulas of strength＇s parameter about the Twin-shear unified strength theory when the coefficient b is of different Value. The strength＇s parameter contains the contributions of the main stress σ1,σ2 and σ3 ,to material strength, and can also be convert to c0、φ0 tested by conventional soil testing method, and to plane problem into ci、φi, which can be used to solve space problems. The unified solutions can be fully applied in the backfill and help obtain outstanding economical benefit.