首页|At-rest lateral earth pressure of compacted expansive soils:Experimental investigations and prediction approach

At-rest lateral earth pressure of compacted expansive soils:Experimental investigations and prediction approach

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
This paper presents experimental studies on a compacted expansive soil,from Nanyang,China for investigating the at-rest lateral earth pressure σL of expansive soils.The key studies include(i)re-lationships between the σL and the vertical stress σV during soaking and consolidation,(ii)the influences of initial dry density ρd0 and moisture content w0 on the vertical and lateral swelling pressures at no swelling strain(i.e.σv0 and σL0),and(iii)evolution of the σL during five long-term wetting-drying cycles.Experimental results demonstrated that the post-soaking σL-σV relationships are piecewise linear and their slopes in the passive state(σL＞σV)and active state(σL＜σV)are similar to that of the consolidationσL-σv relationships in the normal-and over-consolidated states,respectively.The soaking σL-σV re-lationships converge to the consolidation σL-σV relationships at a threshold σV where the interparticle swelling is restrained.The σL0 and σV0 increase monotonically with ρd0;however,they show increasing-then-decreasing trends with the w0.The extent of compaction-induced swelling anisotropy,which is evaluated by σL0/σv0,reduces with an increase in the compaction energy and molding water content.TheσL reduces over moisture cycles and the stress relaxation in the σL during soaking is observed.An approach was developed to predict the at-rest soaking σL-σV relationships,which requires conventional consolidation and shear strength properties and one measurement of the σL-σV relationships during soaking.The proposed approach was validated using the results of three different expansive soils available in the literature.

Lateral earth pressureExpansive soilSoakingVertical stressSwelling pressure

Zhong Han、Pan Zhang、Weilie Zou、Kewei Fan、Sai K.Vanapalli、Lianglong Wan

展开 >

School of Civil Engineering,Wuhan University,Wuhan,China

Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering of the Ministry of Education,Wuhan University,Wuhan,China

Department of Civil Engineering,University of Ottawa,Ottawa,Ontario,Canada

Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing,China

Residence Engineering Management Station of Shenzhen Municipality,Shenzhen,China

展开 >

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaJiangsu Province Excellent Postdoctoral ProgramChina Scholarship Council-University of Ottawa Joint Scholarship

52378365521791092023

2024

10.1016/j.jrmge.2023.10.014

岩石力学与岩土工程学报(英文版)
中国科学院武汉岩土力学所中国岩石力学与工程学会武汉大学

岩石力学与岩土工程学报(英文版)

CSTPCD
影响因子：0.404
ISSN：1674-7755
年,卷(期)：2024.16(4)
  • 80