期刊论文

中文

湖南大学学报(自然科学版)

1674-2974

2023

50

1

171-180

10.16339/j.cnki.hdxbzkb.2023018

National Natural Science Foundation of China（51678230） Science Foundation for Youths of Hunan Province of China（2021JJ40460） Project supported by the Research Foundation of Education Bureau of Hunan Province of China（21C0269）

本校为第一机构

在以往挡墙稳定性分析中多假定墙后回填土为饱和土,忽略了吸应力效应对挡墙滑动稳定性的影响,从而导致计算结果失真.鉴于此,在广义有效应力原理基础上,推导了适用于非饱和土的功能平衡方程,并在此基础上采用能量法提出了一种挡墙-非饱和土系统抗滑移上限稳定性系数计算方法.通过对比OptumG2数值软件和已有理论方法的结果验证了该方法的合理性,并探讨了土体剪切强度、进气值和渗流量等主要参数对挡墙稳定性的影响.结果表明:1)相比砂土,吸应力对黏土挡墙稳定性影响更大,而相比黏土,砂土中黏聚力变化对墙土系统稳定性更为敏感;2)随着进气值增加,吸应力对墙土系统稳定性的贡献减少,最终趋于恒定,且吸...

In the previous analyses of retaining wall stability，it was assumed that the backfill soil behind the wall was saturated soil，and the influence of the suction stress effect on the sliding stability of the retaining wall was ignored，which led to the distortion of the calculation results. In view of this，based on the generalized effective stress principle，the work-energy balance equation applicable to unsaturated soils was derived，and on this basis，a method for calculating the upper limit stability coefficient for anti-sliding of the retai...