黄土构度与基质吸力或压缩屈服变形间的关系

郭瑞峰; 邵帅; 邵生俊; 沈晓钧; 雒少江; 朱学亮

doi:10.13204/j.gyjzG22070902

黄土构度与基质吸力或压缩屈服变形间的关系

doi: 10.13204/j.gyjzG22070902

1. 西安理工大学岩土工程研究所, 西安 710048;
2. 陕西省黄土力学与工程重点实验室, 西安 710048;
3. 陕西省引汉济渭工程建设有限公司, 西安 710086

基金项目:

国家自然科学基金项目（52108342）；陕西省自然科学基础研究计划——引汉济渭联合基金项目（2019JLP-21，2019JLZ-13）；西安理工大学博士启动金（107-451122001）。

详细信息

作者简介:
郭瑞峰,男,1998年出生,硕士研究生。电子信箱:374731351@qq.com

计量
- 文章访问数: 95
- HTML全文浏览量: 8
- PDF下载量: 1
- 被引次数: 0
出版历程
- 收稿日期: 2022-07-09
- 网络出版日期: 2023-12-18

Relations Between Degrees of Loess Structure and Matric Suction or Compressive Yield Deformation

1. Institute of Geotechnical Engineering, Xi'an University of Technology, Xi'an 710048, China;
2. Shaanxi Key Laboratory of Loess Mechanics and Engineering, Xi'an 710048, China;
3. Hanjiang-to-Weihe-River Project Construction Co., Ltd., Shaanxi Province, Xi'an 710086, China

摘要

摘要: 黄土是一种具有特殊结构性的非饱和土。为探讨非饱和黄土基质吸力与构度、压缩屈服变形间的定量关系，对不同场地的黄土试样分别做原状、重塑及原状饱和状态下的单轴抗压强度试验，分析不同含水率黄土的构度变化规律，并测试对应黄土试样的土-水特征曲线，测得不同含水率下的原状黄土的基质吸力指标；在综合物理量与构度定量关系的基础上，建立了基质吸力与构度的关系，并论证了其适用性。通过等向压缩试验，测试确定了等向压缩屈服应力与构度的关系，建立了Q₂、Q₃黄土的压缩屈服应力与构度的关系。通过黄土的构度与压缩屈服应力及等向压缩屈服变形的关系，建立了Q₂、Q₃黄土的构度-压缩屈服-压缩变形的关系式。
- 黄土构度 /
- 基质吸力 /
- 压缩屈服 /
- 压缩变形
Abstract: Loess is a kind of unsaturated soil with special structure. To explore the quantitative relations between structural degrees of unsaturated loess and matric suction or compressive yield deformation, uniaxial compressive strength tests were conducted on loess specimens from different sites in intact, remolded and saturated intact conditions, and the variation laws of structural degrees of loess with different contents of water were analyzed. The soil-water characteristic curves of corresponding loess specimens were tested, and the matric suction indexes of intact loess with different contents of water were measured. Based on the quantitative relations between the physical quantity and the structural degree, the relation between matric suction and the structural degree was established, and its applicability was demonstrated. Through isotropic compression tests, the relation between the yield stress and the structural degree was determined, and the relations between the yield stress and the structured degree of Q₂ loess or Q₃ loess were established. Through the relations between the structural degree of loess and the compressive yield stress or isotropic compressive yield deformation, the relations among the structural degree of Q₂ loess or Q₃ loess, compressive yield and compressive deformation were established.
- loess structure degree /
- matric suction /
- compression yielding /
- compression deformation

HTML全文

参考文献(14)

[1]	太沙基. 理论土力学[M]. 北京:中国地质出版社, 1960.
[2]	谢定义, 齐吉琳. 土结构性及其定量化参数研究的新途径[J]. 岩土工程学报, 1999, 21(6):651-656.
[3]	邵生俊,周飞飞,龙吉勇.原状黄土结构性及其定量化参数研究[J].岩土工学报,2004(4):531-536.
[4]	陈存礼,胡再强,高鹏.原状黄土的结构性及其与变形特性关系研究[J].岩土力学,2006(11):1891-1896.
[5]	骆亚生,谢定义,邵生俊,等.复杂应力状态下的土结构性参数[J].岩石力学与工程学报,2004(24):4248-4251.
[6]	冯志焱. 非饱和黄土的结构性定量化参数与结构性本构关系研究[D].西安:西安理工大学,2008.
[7]	邵生俊,郑文,王正泓,等.黄土的构度指标及其试验确定方法[J].岩土力学,2010,31(1):15-19 ,38.
[8]	邵生俊,王丽琴,陶虎,等.黄土的构度及其与粒度、密度、湿度之间的关系[J].岩土工程学报,2014,36(8):1387-1393.
[9]	王丽琴,邵生俊.黄土构度与物理指标之间的定量关系[J].岩石力学与工程学报,2015,34(增刊2):4380-4386.
[10]	王丽琴,邵生俊,赵聪,等.黄土初始结构性对其压缩屈服的影响[J].岩土力学,2018,39(9):3223-3228.
[11]	蒋明镜,张浩泽,李涛,等.非饱和重塑与结构性黄土等向压缩试验离散元分析[J].岩土工程学报,2019,41(增刊2):121-124.
[12]	罗爱忠,方娟,陈昌禄,等.结构性黄土压缩屈服特性及湿压模型[J].工业建筑,2014,44(12):83-87 ,117.
[13]	陈存礼,张登飞,张洁,等.等向应力下原状黄土的压缩及增湿变形特性研究[J].岩石力学与工程学报,2017,36(7):1736-1747.
[14]	LU N,LIKOS W J.Unsaturated Soil Mechanics[M].Hobokin:John Wiley & Sons,2004.