Experimental study on influence of stress state on at-rest earth pressure coefficient for coarse grained soil

ZHU Jun-gao; JIANG Ming-jie; LU Yang-yang; JI En-yue; LUO Xue-hao

doi:10.16285/j.rsm.2017.2136

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Experimental study on influence of stress state on at-rest earth pressure coefficient for coarse grained soil

更新时间：2026-06-25

- Experimental study on influence of stress state on at-rest earth pressure coefficient for coarse grained soil
- Vol. 40, Issue 3, Pages: 827-833(2019)
- 作者机构：
  
  1. 河海大学岩土力学与堤坝工程教育部重点实验室
  2. 河海大学江苏省岩土工程技术工程研究中心
  3. 上海岩土工程勘察设计研究院有限公司环境工程公司
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2017.2136
  CLC： TU43
- Published：2019
- 稿件说明：
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[1]朱俊高,蒋明杰,陆阳洋,吉恩跃,罗学浩.应力状态对粗颗粒土静止侧压力系数影响试验研究[J].岩土力学,2019,40(03):827-833+851.

ZHU Jun-gao, JIANG Ming-jie, LU Yang-yang, et al. Experimental study on influence of stress state on at-rest earth pressure coefficient for coarse grained soil[J]. 2019, 40(3): 827-833.
[1]朱俊高,蒋明杰,陆阳洋,吉恩跃,罗学浩.应力状态对粗颗粒土静止侧压力系数影响试验研究[J].岩土力学,2019,40(03):827-833+851. DOI： 10.16285/j.rsm.2017.2136.

ZHU Jun-gao, JIANG Ming-jie, LU Yang-yang, et al. Experimental study on influence of stress state on at-rest earth pressure coefficient for coarse grained soil[J]. 2019, 40(3): 827-833. DOI： 10.16285/j.rsm.2017.2136.

摘要

土体静止侧压力系数K0随应力状态的变化规律对深入把握其力学性质非常重要。然而

由于适用于粗粒土K0试验仪器及方法较少

对粗粒土K0随应力状态变化规律的研究几乎是空白的。为研究加载和卸载过程中粗颗粒土静止侧压力系数K0随应力状态的变化规律

利用新近研制的大型K0试验仪对某砂卵砾石料和堆石料进行了不同应力状态下的K0试验。K0试验结果表明:颗粒形态、应力状态、级配都对粗粒土K0有一定影响

其中应力状态影响最为明显;加、卸载时粗粒土K0随竖向应力增大呈减小的趋势。通过对K0试验结果进行深入分析

提出了粗颗粒土在加载过程中K0与竖向应力的关系式

并进行了验证。在此式基础上

基于前人总结所得K0与OCR的关系式

总结了一个反映任意固结状态下粗颗粒土K0随应力状态变化的关系式。

Abstract

The research on K0 behavior under different stress states is important in grasping the mechanical parameter of the soils.However

there are few apparatuses and methods applicable for measuring K0 of coarse grained soil

therefore

as for the K0 behavior of coarse grained soil in different stress states

the relevant researches are almost blank. For coarse grained

in order to study the transformation law of at-rest earth pressure coefficient（K0） during loading and unloading

a new large-size K0 test apparatus was developed and used to conduct a serial of K0 tests for sandy gravel and rockfill in different stress states. The results of K0 test show the particle morphology、stress state and grading all have certain effect on the value of K0 of coarse grained soil

and the effect of stress state is the most obvious. During loading or unloading

K0 of coarse grained soil will decrease with the increasing of vertical stress.Furthermore

based on the results

a description of the K0 considering effective vertical stress during loading is established and verified. Lastly

based on this description and the relation between K0 and over consolidation ration（OCR） developed by former researcher

an empirical equation is obtained

which can well describe the relationship between K0 and stress state under an arbitrary consolidation condition.

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