高级搜索
  • 全国中文核心期刊
  • 中国科技核心期刊
  • 美国工程索引（EI）收录期刊
  • Scopus数据库收录期刊

非饱和原状黄土增湿条件下力学特性试验研究

高帅, 骆亚生, 胡海军, 王鹏程, 张帅, 刘建龙

高帅, 骆亚生, 胡海军, 王鹏程, 张帅, 刘建龙. 非饱和原状黄土增湿条件下力学特性试验研究[J]. 岩土工程学报, 2015, 37(7): 1313-1318. DOI: 10.11779/CJGE201507019
引用本文: 高帅, 骆亚生, 胡海军, 王鹏程, 张帅, 刘建龙. 非饱和原状黄土增湿条件下力学特性试验研究[J]. 岩土工程学报, 2015, 37(7): 1313-1318. DOI: 10.11779/CJGE201507019
shu
GAO Shuai, LUO Ya-sheng, HU Hai-jun, WANG Peng-cheng, ZHANG Shuai, LIU Jian-long. Triaxial tests on water immersion of unsaturated and undisturbed loess[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(7): 1313-1318. DOI: 10.11779/CJGE201507019
Citation: GAO Shuai, LUO Ya-sheng, HU Hai-jun, WANG Peng-cheng, ZHANG Shuai, LIU Jian-long. Triaxial tests on water immersion of unsaturated and undisturbed loess[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(7): 1313-1318. DOI: 10.11779/CJGE201507019
shu

非饱和原状黄土增湿条件下力学特性试验研究  English Version

  • 1. 西北农林科技大学水利与建筑工程学院,陕西 杨凌 712100; 2. 内蒙古自治区水利科学研究院,内蒙古 呼和浩特 010020

基金项目: 国家自然科学基金项目（51178392）
详细信息
    作者简介:

    高 帅(1989- ),男,硕士研究生,研究方向为岩土工程理论与计算。E-mail: shuai_200808@163.com。

Triaxial tests on water immersion of unsaturated and undisturbed loess

  • 1. College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling 712100, China; 2. Inner Mongolia Institute of Hydraulic Research, Inner Mongolia, Hohhot 010020, China

摘要

    摘要
  • 摘要: 利用FSY30型应变控制式非饱和土三轴仪采用常含水率试验,研究陕西泾阳县某边坡原状黄土在不同含水率（无偏应力条件下增湿）、不同固结围压下的强度和变形特性,求得Fredlund双应力状态变量抗剪强度公式中φb值并利用含水率建立了工程中实用的抗剪强度公式;再将天然原状土在不同偏应力水平下增湿饱和后继续剪切,观察其力学特性。两种增湿条件下试验结果表明：该地区黄土应力应变曲线关系呈剪切硬化型;含水率与初始基质吸力呈双曲线关系,剪切过程中基质吸力无明显变化,抗剪强度指标黏聚力随着含水率的增大显著降低而内摩擦角所受影响较小;有偏应力条件下试样浸水饱和后破坏强度显著降低,但对应力应变关系影响较小,增湿时偏应力水平越低,土样饱和后的稳定偏应力值越小。
    Abstract: In order to study the mechanical properties of undisturbed loess slope under different circumstances in Jingyang county of Shaanxi Province, two humidification experiments are conducted. The constant water content tests are operated to observe the strength and deformation characteristics under different water contents (humidify with no stress conditions) and confining pressures by obtaining the value of φb in the shear strength formula of Fredlund’s double stress state variables, and a practical shear strength formula for the water content is derived by using FSY30 type strain controlled triaxial apparatus for unsaturated soils. The other tests are the experiments under different confining pressures and partial stresses in which cuts of the undisturbed loess are operated twice before and after the flooding to saturation. The two experiments reveal: (1) The stress-strain curves of loess in this region takes a hardening type according to the data analysis from the two tests; (2) Based on the constant water content tests, the water content and initial matric suction are hyperbolically related, and the matric suction shows no significant changes in the process of shearing. And the increase of water content has larger influence on the decrease of cohesion of shear strength index than the impact on internal friction angle; (3) On the basis of the second experiment, the strength of specimens decreases significantly after flooding which has little effect on the stress-strain curves. The lower the partial stress when humidification takes place, the lower the stable partial stress values.
    • HTML全文
    • 参考文献(13)
  • [1] 谢定义. 试论我国黄土力学研究中的若干新趋向[J]. 岩土工程学报, 2001, 23(1): 3-13. (XIE Ding-yi. Exploration of some new tendencies in research of loess soil mechanics[J]. Chinese Journal of Geotechnical Engineering, 2001, 23(1): 3-13. (in Chinese))
    [2] 邢义川, 吴培安, 骆亚生. 非饱和原状黄土三轴试验方法研究[J]. 水利学报, 1996(1): 47-52. (XING Yi-chuan, WU Pei-an, LUO Ya-sheng. Triaxial test on undisturbed unsaturated loess[J]. Journal of Hydraulic Engineering, 1996(1): 47-52. (in Chinese))
    [3] 方祥位, 陈正汉, 申春妮, 等. 原状Q 2 黄土三轴剪切特性[J]. 岩石力学与工程学报, 2008, 27(2): 383-389. (FANG Xiang-wei, CHEN Zheng-han, SHEN Chun-ni, et al. Triaxial shear properties of undisturbed loess Q 2 [J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(2): 383-389. (in Chinese))
    [4] 李永乐, 张红芬, 佘小光, 等. 原状非饱和黄土的三轴试验研究[J]. 岩土力学, 2008, 29(10): 2859-2863. (LI Yong-le, ZHANG Hong-fen, She Xiao-guang, et al. Experimental study of triaxial test of undisturbed unsaturated loess[J]. Rock and Soil Mechanics, 2008, 29(10): 2859-2863. (in Chinese))
    [5] 陈存礼, 张登飞, 董玉柱, 等. 常含水率三轴条件下非饱和原状黄土的吸力和力学特性[J]. 岩土工程学报, 2013, 35: 1-8. (CHEN Cun-li, ZHANG Deng-fei, DONG Yu-zhu, et al. Suction and mechanical behavior of unsaturated intact loess from constant water content triaxial tests[J]. Chinese Journal of Geotechnical Engineering, 2013, 35: 1-8. (in Chinese))
    [6] 李加贵, 陈正汉, 黄雪峰. 原状Q 3 黄土湿陷特性的CT-三轴试验[J]. 岩石力学与工程学报, 2010, 29(6): 1288-1296. (LI Jia-gui, CHEN Zheng-han, HUANG Xue-feng. CT-triaxial test for collapse abllity of undisturbed Q 3 loess[J]. Chinese Journal of Rock Mechanics and Engineering, 2010, 29(6): 1288-1296. (in Chinese))
    [7] 张苏民, 郑建国. 湿陷性黄土(Q 3 )的增湿变形特征[J]. 岩土工程学报, 1990, 12(4): 21-31. (ZHANG Su-min, ZHENG Jian-guo. The deformation characteristics of collapsible loess during moistening process[J]. Chinese Journal of Geotechnical Engineering, 1990, 12(4): 21-31. (in Chinese))
    [8] 谢定义. 高等土力学[M]. 北京: 高等教育出版社, 2008. (XIE Ding-yi. Advanced soil mechanics[M]. Beijing: Higher Education Press, 2008. (in Chinese))
    [9] 陈正汉, 谢定义, 王永胜. 非饱和土的水气运动规律及其工程性质研究[J]. 岩土工程学报, 1993, 15(3): 53-56. (CHEN Zheng-han, XIE Ding-yi, WANG Yong-sheng. Experimental studies of laws of fluid motion, suction and pore pressures in unsaturated soil[J]. Chinese Journal of Geotechnical Engineering, 1993, 15(3): 53-56. (in Chinese))
    [10] 缪林昌, 殷宗泽, 刘松玉. 非饱和膨胀土强度特性的常规三轴试验研究[J]. 东南大学学报(自然科学版), 2000, 30(1): 121-125. (MIAO Lin-chang, YIN Zong-ze, LIU Song-yu. Research on strength characteristics of unsaturated expansive soils based on general triaxial test[J]. Journal of Southeast University (Natural Science), 2000, 30(1): 121-125. (in Chinese))
    [11] 陈正汉. 重塑非饱和黄土的变形、强度、屈服和水量变化特性[J]. 岩土工程学报, 1999, 2l(1): 82-90. (CHEN Zheng-han. Deformation, strength, yield and moismre change of a remolded unsaturated loess[J]. Chinese Journal of Geotechnical Engineering, 1999, 21(1):82-90. (in Chinese))
    [12] LU N, WILLIAM J L. 非饱和土力学[M]. 北京:高等教育出版社, 2012: 4-328. (LU N, WILLIAM J L. Soil mechanics for unsaturated soils[M]. Beijing: Higher Education Press, 2012: 4-328. (in Chinese))
    [13] FREDLUND D G, RAHARDJO H. Soil mechanics for unsaturated soil[M]. New York: John Wiley & Sons, lnc, 1993.
    • 相关文章
    • 施引文献
    • 资源附件(0)
计量
  • 文章访问数:  312
  • HTML全文浏览量:  5
  • PDF下载量:  331
  • 被引次数: 0
出版历程
  • 收稿日期:  2014-08-10
  • 发布日期:  2015-07-19

目录

摘要
HTML全文
    参考文献(13)
    相关文章
    施引文献
    资源附件(0)

    /

    返回文章
    返回
    版权所有 © 2010水利部交通部国家能源局南京水利科学研究院 苏ICP备05007122号-11公安联网备案号：32010602011255
    编辑部地址：南京市虎踞关34号《岩土工程学报》编辑部邮编：210024电话：025-85829534，85829556E-mail: ge@nhri.cn