Experimental study of soil water properties, compression yield and collapse deformation of unsaturated remolded loess

WANG Jiao; SHAO Sheng-jun; CHEN Pan

doi:10.16285/j.rsm.2017.S2.030

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Experimental study of soil water properties, compression yield and collapse deformation of unsaturated remolded loess

更新时间：2026-06-25

- Experimental study of soil water properties, compression yield and collapse deformation of unsaturated remolded loess
- Vol. 38, Issue S2, Pages: 217-222(2017)
- 作者机构：
  
  1. 西安理工大学岩土工程研究所,陕西,西安,710048
  2. 西安理工大学陕西省黄土力学与工程重点实验室,陕西,西安,710048
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2017.S2.030
  CLC： TU444
- Online First：05 June 2018，
  
  Published：2017
- 稿件说明：
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WANG Jiao, SHAO Sheng-jun, CHEN Pan. Experimental study of soil water properties, compression yield and collapse deformation of unsaturated remolded loess[J]. 2017, 38(S2): 217-222.
DOI：

WANG Jiao, SHAO Sheng-jun, CHEN Pan. Experimental study of soil water properties, compression yield and collapse deformation of unsaturated remolded loess[J]. 2017, 38(S2): 217-222. DOI： 10.16285/j.rsm.2017.S2.030.

摘要

利用改造的非饱和土固结仪对Q3重塑黄土分别进行了无应力作用的分级增湿试验和控制基质吸力的压缩试验，测试得到了土–水特征曲线和压缩应力–应变曲线，研究了饱和度与基质吸力和含水率与基质吸力之间关系、压缩屈服应力随基质吸力的变化规律和湿陷系数随基质吸力的变化规律。研究结果表明，非饱和重塑黄土的吸力较大时土的强度较大，其压缩变形较小，非饱和重塑黄土的结构屈服压力较大；非饱和土基质吸力一定时，随着压力的增大，湿陷系数呈现出先增大后减小的趋势；同一净压缩应力下非饱和土基质吸力越大，湿陷系数越大，吸力越小，土样的 (p = 200 kPa)越小，当 (p = 200 kPa)超过约0.1时， (p = 200 kPa)与基质吸力（）近似呈指数增加。

Abstract

Stepped wetting tests with stress free and compression experiments under controlled matric suction are performed on remolded Q3 loess by using refitted consolidation apparatus for unsaturated soils. The soil-water characteristic curves and compression stress-strain curves are obtained. Meanwhile

the relationship between saturation and matric suction and that between water content and suction are studied. The law of compressive yield stress varying with matric suction and that of collapsibility coefficient varying with matric suction are also studied. The results show that when the suction of unsaturated remolded loess is large

the strength of it is large and the compression deformation is small. And the structural yield pressure of unsaturated remolded loess is larger. When the suction is constant

with the increasing of pressure

the collapsibility coefficient shows a tendency of first increased and then decreased. Under the same net compression stress

the greater the matric suction of unsaturated soil is

the larger the collapsibility coefficient change sand vice versa. Once the (p = 200 kPa) is in excess of 0.1

the matrix suction will approximately exponentially increase with it.

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