关键词: 剩余推力, 应变软化, 应变折减系数, 剪应变, 抗滑桩推力

Abstract: The basic hypothesis of residual thrust method is only suitable for perfect-plastic materials or strain-hardening materials. For the slope with strain softening properties, the applicability of this method will be limited. This paper based on the strain softening properties of soil aims to explore the relationship between shear strain and the shear capacity, by introducing equations of strain compatibility at the bottom of the bars, the method for landslide thrust calculation is improved; and then a new method for calculating designed thrust of anti-slide pile considering strain softening properties is proposed. The case studies show that the coefficient of landslide stability calculated by improved calculation method is between the values respectively computed on the condition of peak strength and residual strength; and the designed thrust of anti-slide pile obtained by improved method is much lower than that obtained by residual strength, but is higher than that obtained by peak strength, is between the two sides all the same. The method proposed is based on the current status of the landslide; so it can curb the further development of the landslide and also conform to the actual situation of the slope at present.

Key words: residual thrust, strain softening, strain-dependent coefficient, shear strain, thrust of anti-slide pile