Internal variable gradient model for active earth pressure of rigid retaining wall moving with translation  

作　　者：Haoxiang Chen Mingyang Wang Shuo Wang Chengzhi Qi 

机构地区：[1]Beijing University of Civil Engineering and Architecture,Beijing,100044,China [2]State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact,Army Engineering University of PLA,Nanjing,210007,China [3]Navy 971 Hospital of PLA,Qingdao,Shandong,266071,China

出　　处：《Geohazard Mechanics》2024年第3期189-196,共8页岩土灾变力学（英文）

基　　金：supported by the Beijing Municipal Natural Science Foundation(Grant No.8,222,010);Research Project for Young Scholars of BUCEA(Grant No.X2102080921019);Henan Key Laboratory of Special Protective Materials(Grant No.SZKFKT202102).

摘　　要：The instability of retaining wall is a key factor for many geo-hazards,such as landslides.To estimate the stability of retaining wall,the distribution of earth pressure is necessary.The results of in-situ observations and indoor experiments demonstrate that the distribution of earth pressure behind the retaining wall exhibits remarkable nonlinearity.When the results are analyzed in details,the oscillation and quasi-periodicity of the distribution of earth pressure are observed,which has not been given widely concerns and cannot be described by the existing analytical models.Based on the internal variable gradient theory and operator averaging method,a gradientenhanced softening constitutive model is proposed in this paper to describe the oscillation and quasiperiodicity of the distribution of earth pressure acting on the retaining wall,by introducing the high-order gradient terms of the hydrostatic pressure into Mohr-Coulomb yield condition.In order to check the applicability of the proposed formulation,the predictions from the formulations are compared with the full-scale and laboratory-scale test results as well as the existing formulations.It is noted from the comparisons between predicted and measured values that the results of gradient-dependent softening constitutive model provides the comparable approximations for active earth pressure and describes the oscillation and quasi-periodicity very well.This model may enhance the comprehension of soil mechanics and provide a novel view for the design of the retaining wall.

关 键 词：Retaining wall Active earth pressure Oscillation and quasi-periodicity Gradient theory 

分 类 号：TU435[建筑科学—岩土工程]