基于双剪统一空间轴对称特征线场理论的竖井井壁压力计算方法

基于双剪统一强度准则提出了有重材料的双剪统一空间轴对称特征线场理论，并用该特征线场理论研究了岩土工程中竖井井壁压力的计算问题，得出了新的井壁压力计算表达式。算例结果表明，由双剪统一空间轴对称特征线场理论导出的竖井井壁压力随井深的变化是非线性的，强度统一强度准则中的参数b对井壁压力计算结果有较大影响，在相同井深条件下，井壁压力随b增大而减小。

Calculation method of pressures acting on shaft wall based on twin shear unified spatially axisymmetric characteristics line theory

A new unified axisymmetric characteristics line theory for weight materials is proposed based on the twin shear failure criterion;and pressures acting on the shaft wall are researched;and a new calculating method is given out with the new axisymmetric characteristics line theory.Example results show that the relationship between the pressures and the shaft depth is nonlinear.The parameter b in the twin shear unified strength criterion has significant effect on pressures.The larger the b is,the less the pressures are when shaft is at the same depth.