Exploratory Study on the Role of Suction in Unsaturated Strength Theory Analysis

张金存; 程谦恭; 苏国锋; 李星; 罗浩

doi:10.13409/j.cnki.jdpme.2017.04.026

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Exploratory Study on the Role of Suction in Unsaturated Strength Theory Analysis

更新时间：2025-12-11

- Exploratory Study on the Role of Suction in Unsaturated Strength Theory Analysis
- Vol. 37, Issue 4, Pages: 689-696(2017)
- 作者机构：
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- DOI：10.13409/j.cnki.jdpme.2017.04.026
  CLC： U443
- Published：2017
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[1]张金存,程谦恭,苏国锋,李星,罗浩.吸力在非饱和强度理论计算中的探索性试验分析[J].防灾减灾工程学报,2017,37(04):689-696.

张金存, 程谦恭, 苏国锋, et al. Exploratory Study on the Role of Suction in Unsaturated Strength Theory Analysis[J]. 2017, 37(4): 689-696.
[1]张金存,程谦恭,苏国锋,李星,罗浩.吸力在非饱和强度理论计算中的探索性试验分析[J].防灾减灾工程学报,2017,37(04):689-696. DOI： 10.13409/j.cnki.jdpme.2017.04.026.

张金存, 程谦恭, 苏国锋, et al. Exploratory Study on the Role of Suction in Unsaturated Strength Theory Analysis[J]. 2017, 37(4): 689-696. DOI： 10.13409/j.cnki.jdpme.2017.04.026.

摘要

为探讨南宁非饱和弱膨胀土强度

寻求一种基于物理力学参量简化的强度方程。以弱膨胀土非饱和特性变化规律为依托

开展击实试验、自由膨胀率试验

三轴试验和膨胀力试验等一系列室内试验

获得了不同含水率下的吸附强度与膨胀力间的变化关系。结果表明:抗剪强度随含水率增加而减小

膨胀力与吸附强度变化关系可用指数函数形式表征。基于试验成果

从土的含水率与吸力出发

以膨胀力为变量

建立吸力作用下的预测模型

探索出一种改进的南宁弱膨胀土的强度预测方程。该方程能很好的预测抗剪强度

为非饱和强度理论分析提供一条新途径。

Abstract

A simplified strength equation based on physical parameters is desired to study the strength of Nanning unsaturated slight expansive soil. A series of laboratory tests

such as compaction test

free swelling ratio test

triaxial compression test and expansive force tests

were conducted to study the unsaturated behavior of the slight expansive soil

which attained the relationship between the suction strength and the expansive force with different moisture contents.The results suggest: the stress strength of such soil decreases as the moisture content increases

and the relationship between the suction strength and the expansive force can be described using an exponential function. From the points of moisture content and suction strength

a predicted strength equation of Nanning slight expansive soil is established

where the expansive force works as the variable. This equation can predict stress strength well

and it maybe provides a new method for the analysis of unsaturated strength.

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references

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非饱和土土力学[M]. 中国建筑工业出版社 , (加)D.G.弗雷德隆德（DelwynG.Fredlund）,（印尼）H.拉哈尔佐（HariantoRahardjo）著, 1997

Unsaturated shear strength of a silty sand [J] . Reto Schnellmann,Harianto Rahardjo,Hans R. Schneider. Engineering Geology . 2013

Experimental study on the swelling behaviour of bentonite/claystone mixture [J] . Qiong Wang,Anh Minh Tang,Yu-Jun Cui,Pierre Delage,Behrouz Gatmiri. Engineering Geology . 2011

Influence of dry density and water content on the swelling of a compacted bentonite [J] . M. Victoria Villar,Antonio Lloret. Applied Clay Science . 2007 (1)

Laboratory assessment of swelling pressure of expansive soils [J] . Adnan A. Basma,Azm S. Al-Homoud,Abdallah Husein. Applied Clay Science . 1995 (5)

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