[1]王 燕,姚仰平,胡玉定,等.不同含水率原状黄土的强度与变形特性试验研究[J].西安建筑科技大学学报(自然科学版),2022,54(03):325-330.[doi:10.15986/j.1006-7930.2022.03.002]
　WANG Yan,YAO Yangping,HU Yuding,et al.Experimental study on strength and deformation characteristics of intact loess with different water contents[J].J. Xi'an Univ. of Arch. & Tech.(Natural Science Edition),2022,54(03):325-330.[doi:10.15986/j.1006-7930.2022.03.002]
点击复制

不同含水率原状黄土的强度与变形特性试验研究()
分享到：

西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
54
期数:
2022年03期
页码:
325-330
栏目:
出版日期:
2022-06-28

文章信息/Info

Title:
Experimental study on strength and deformation characteristics of intact loess with different water contents
文章编号:
1006-7930(2022)03-0325-06
作者:
王 燕1; 姚仰平2; 胡玉定1; 梅 源1
(1.西安建筑科技大学 土木工程学院,陕西 西安 710055; 2.北京航空航天大学 交通科学与工程学院,北京 100191)
Author(s):
WANG Yan1;  YAO Yangping2;  HU Yuding1;  MEI Yuan1
(1.School of Civil Engineering,Xi'an Univ. of Arch. & Tech.,Xi'an 710055,China; 2.School of Transportation Science and Engineering,Beihang University,Beijing 100191,China)
关键词:
原状Q3黄土;  含水率;  结构强度;  应力-应变关系;  基质吸力
Keywords:
intact Q3 loess;  water content;  structural strength;  stress-strain relationship;  suction
分类号:
TU471.4
DOI:
10.15986/j.1006-7930.2022.03.002
文献标志码:
A
摘要:
为研究含水率的变化对黄土强度与变形特性的影响规律,通过FSY30型应变控制式非饱和土三轴仪,进行了5种不同含水率下原状Q3黄土的各向等压固结试验和三轴剪切试验.研究结果表明:由原状黄土各向等压固结试验e-lnp曲线确定的结构强度ps随初始含水率w的增大而连续降低,两者之间的关系可用幂函数ps=Awλ来描述; 由三轴剪切试验得到的(σ1-σ3 )-ε1关系曲线在固结围压(σ3-ua)=50 kPa时呈现为弱硬化型,在固结围压(σ3-ua)=200 kPa、300 kPa时呈现为强硬化型; 由三轴剪切试验得到的εv-ε1关系曲线在w=9.0%,(σ3-ua)=50 kPa、100 kPa时呈现弱软化型,其余试验条件下均为强硬化型; 原状黄土的黏聚力c及固结后的初始基质吸力(uw-ua)均随着初始含水率w的增加而迅速减小.
Abstract:
In order to study the strength and deformation characteristics of intact loess with different water contents, the isotropic consolidation compression tests and triaxial shear tests are performed by using FSY30 unsaturated soil strain-controlled triaxial apparatus. The research results are summarized as follows: The structural strength ps decreases continuously when the initial water content increases, and their relationship could be described by the power function ps=Awλ; (σ1-σ3 )-ε1 curves from triaxial shear tests are the weak hardening when the confining pressure (σ3-ua) is 50 kPa, but they show the strong hardening when the confining pressure(σ3-ua) is 200 kPa or 300 kPa; The εv-ε1 curves from samples with water content of 9.0% are the weak softening when the confining pressure (σ3-ua) is 50 kPa or 100 kPa, but they show strong hardening type in other test conditions; The cohesion c and the initial suction (uw-ua) after consolidation decrease rapidly with the increase of initial water contents.

参考文献/References:

[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 Dingyi.Exploration of some new tendencies in research of loess soil mechanics[J].Chinese Journal of Geotechnical Engineering,2001, 23(1):3-13.
[2]李宁,程国栋,谢定义.西部大开发中的岩土力学问题[J].岩土工程学报,2001,23(3):268-272.
LI Ning,CHENG Guodong,XIE Dingyi. Geomechanics development in civil construction in Western China[J].Chinese Journal of Geotechnical Engineering,2001,23(3):268-272.
[3]陈正汉.非饱和土与特殊土力学的基本理论研究[J].岩土工程学报,2014,36(2):201-272.
CHEN Zhenghan. On basic theories of unsaturated soils and special soils[J].Chinese Journal of Geotechnical Engineering,2014,36(2):201-272.
[4]胡再强,沈珠江,谢定义.结构性黄土的变形特性[J].岩石力学与工程学报,2004,23(24):4142-4146.
HU Zaiqiang,SHEN Zhujiang,XIE Dingyi. Deformation propreties of structural loess[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(24):4142-4146.
[5]胡再强,沈珠江,谢定义.结构性黄土的本构模型[J].岩石力学与工程学报,2005,24(4):565-569.
HU Zaiqiang,SHEN Zhujiang,XIE Dingyi.Constitutive model of structural loess[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(4):565-569.
[6]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].岩土工程学报,2004,26(4):531-536.
SHAO Shengjun,ZHOU Feifei,LONG Jiyong.Structural properties of loess and its quantitative parameter[J].Chinese Journal of Geotechnical Engineering,2004,26(4):531-536.
[7]邵生俊,龙吉勇,杨生,等.湿陷性黄土结构性变形特性分析[J].岩土力学,2006,27(10):1668-1672.
SHAO Shengjun,LONG Jiyong,YANG Sheng,et al.Analysis of structural deformation properties of collapsible loess[J].Rock and Soil Mechanics,2006,27(10):1668-1672.
[8]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,2014,36(7):1195-1202.
CHEN Cunli,ZHANG Dengfei,DONG Yuzhu,et al.Suction and mechanical behaviours of unsaturated intact loess from constant water content triaxial tests[J].Chinese Journal of Geotechnical Engineering,2014,36(7):1195-1202.
[9]FANG Jinjin,FENG Yixin.The Characteristics of suction,yield and strength for the unsaturated intact loess based on true tri-axial tests [J].Journal of engineering research,2019,7(3):33-47.
[10]FANG Jinjin,FENG Yixin,LI Zhen. Compression and shear strength characteristics of unsaturated intact loess in true triaxial tests.Geotechnical testing journal,2020,43(6):1436-1462.
[11]KATUWAL S,NORGAARD T,MOLDRUP P,et al. Linking air and water transport in intact soils to macropore characteristics inferred from X-ray computed tomography [J]. Geoderma,2015,237/238:9-20.
[12]LI T C,SHAO M A,JIA Y H.Application of X-ray tomography to quantify macropore characteristics of loess soil under two perennial plants[J].European Journal of Soil Science,2016,67(3):266-275.
[13]朱元青,陈正汉.原状Q3黄土在加载和湿陷过程中细观结构动态演化的CT三轴试验研究[J].岩土工程学报,2009,31(8):1219-1228.
ZHU Yuanqing,CHEN henghan.Experimental study on dynamic evolution of meso-structure of intact Q3 loess during loading and collapse using CT and triaxial apparatus[J].Chinese Journal of civil Engineering,2009,31(8):1219-1228.
[14]李加贵,陈正汉,黄雪峰.原状Q3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 Jiagui,CHEN Zhenghan,HUANG Xuefeng.CT-triaxial test for collapsibility of undisturbed Q3 loess[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(6):1288-1296.
[15]姚志华,陈正汉,李加贵,等.基于CT技术的原状黄土细观结构动态演化特征[J].农业工程学报,2017, 33(13):134-142.
YAO Zhihua,CHEN Zhenghan,LI Jiagui,et al.Meso-structure dynamic evolution characteristic of undisturbed loess based on CT technology[J].Transactions of the Chinese Society of Agricultural Engineering,2017,33(13):134 -142.
[16]HAMAMDSHIEV K B. Investigation of Pseudo-overconsolidation of soils[C]//Proc 10th International Conference on Soil Mechanics and Foundation Engineering.Stockholm:Sweden ICSMFE,1981.
[17]胡再强,沈珠江,谢定义.非饱和黄土的结构性研究[J].岩石力学与工程学报,2000,19(6):775-779.
HU Zaiqiang,SHEN Zhujiang,XIE Dingyi. Research on structural behavior of unsaturated loess[J].Chinese Journal of Rock Mechanics and Engineering,2000,19(6):775-779.
[18]高国瑞.黄土湿陷变形的结构理论[J].岩土工程学报,1990,12(4):1-10.
GAO Guorui. A structure theory for collapsing deformation of loess soils[J].Chinese Journal of Geotechnical Engineering,1990,12(4):1-10.
[19]THU T M,RAHARDJO H,LEONG E C.Critical state behaviour of a compacted silt specimen[J].Soils and Foundations,2007,47(4):749-755.
[20]孙银磊,汤连生,刘洁.非饱和土微观结构与粒间吸力的研究进展[J].岩土力学,2020,41(4):1095-1122.
SUN Yinlei,TANG Liansheng,LIU Jie. Advances in research on microstructure and intergranular suction of unsaturated soils[J].Rock and Soil Mechanics,2020,41(4):1095-1122.

相似文献/References:

[1]张莹莹,杨忠年,时 伟,等.冻融循环作用下膨胀土边坡稳定性模型试验研究[J].西安建筑科技大学学报(自然科学版),2020,52(02):257.[doi:10.15986/j.1006-7930.2020.02.015]
　ZHANG Yingying,YANG Zhongnian,SHI Wei,et al.Model test study on the stability of expansive soil slope under freeze-thaw cycle[J].J. Xi'an Univ. of Arch. & Tech.(Natural Science Edition),2020,52(03):257.[doi:10.15986/j.1006-7930.2020.02.015]
[2]王叶娇,丁科竞,徐云山.粉质黏土导热系数变化规律及模型预测[J].西安建筑科技大学学报(自然科学版),2021,53(04):518.[doi:10.15986/j.1006-7930.2021.04.008]
　WANG Yejiao,DING Kejing,XU Yunshan.Variation law and model prediction of thermal conductivity of silty clay[J].J. Xi'an Univ. of Arch. & Tech.(Natural Science Edition),2021,53(03):518.[doi:10.15986/j.1006-7930.2021.04.008]

备注/Memo

备注/Memo:
收稿日期:2021-08-12修改稿日期:2022-05-24
基金项目:国家自然科学基金项目(52178302); 西安建筑科技大学专项基金项目(ZR20015)
第一作者:王 燕(1981—),女,博士,工程师,主要从事黄土力学方面的研究工作.E-mail:wangyanpost@163.com.
更新日期/Last Update: 2022-06-28