纸质出版:2018
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[1]毕银强,张茂省,谷天峰,冯立.非饱和黄土土水特征及其强度指标[J].防灾减灾工程学报,2018,38(03):520-527.
毕银强, 张茂省, 谷天峰, et al. Soil-water Characteristics and Strength Indexes of Unsaturated Loess[J]. 2018, 38(3): 520-527.
[1]毕银强,张茂省,谷天峰,冯立.非饱和黄土土水特征及其强度指标[J].防灾减灾工程学报,2018,38(03):520-527. DOI: 10.13409/j.cnki.jdpme.2018.03.016.
毕银强, 张茂省, 谷天峰, et al. Soil-water Characteristics and Strength Indexes of Unsaturated Loess[J]. 2018, 38(3): 520-527. DOI: 10.13409/j.cnki.jdpme.2018.03.016.
以多种理论模型对非饱和土三轴仪实测数据进行了拟合评价;并在此基础上
引入非饱和土最新理论
反演和解析了土体脱湿与吸湿条件下的边界土-水特征曲线、渗透系数函数以及吸应力特征曲线;进一步从强度本构入手
结合不同基质吸力的三轴剪切试验结果
探究了基于吸应力的强度特性。研究结果表明:非饱和土三轴仪所测数据点及其三种模型拟合曲线均落在水力边界曲线(SWCC、HCF、SSCC)范围之内
表明了试验结果的正确性和合理性
以及非饱和土中水分的能量和数量的关系因路径差异而具可变性
即基质吸力不再是含水率的单值函数
而是一个范围体系;同时采用吸应力特征曲线的统一有效应力原理来描述土体在非饱和条件下的抗剪强度性质是合理的、普遍有效的
并且验证了土体处于饱和或者无基质吸力时
吸应力不为零
此时的吸应力对应的是土体在剪切破坏时的表观粘聚力这一结论。
Studies on soil-water characteristics and shear strength of unsaturated loess have a great significance to prevent and reduce natural disasters of the Loess Plateau.Considering the diversity of soil-water models
several theoretical models were used to fit and evaluate the measurement data of triaxial test apparatus.On this basis
the boundary soil water characteristic curve
hydraulic conductivity function and suction stress characteristic curve were inversed and analyzed under drying and wetting conditions with the latest theory of unsaturated soil.Furthermore
in view of the constitutive relationship
strength characteristics were studied based on suction stress using triaxial shear testing results under different matrix suctions.The results show that the data points measured by the triaxial test apparatus and three corresponding model fitting curves fall within the range of the hydraulic boundary curves(SWCC
HCF and SSCC)
which indicated that the test results are correct and reasonable.The results also indicated that the relationship between the energy and the quantity of moisture in unsaturated soils is variable due to path differences
that is
matrix suction is no longer a single-valued function of water content
but a range system.Meanwhile
it is reasonable and generally effective to use the uniform effective stress principle of the suction stress characteristic curve to describe the shear strength properties of unsaturated soil.It is also verified that the suction stress is unequal to zero when the soil is saturated or without matrix suction;the suction stress at this time corresponds to the apparent cohesion of soil at shear failure.
基于CD三轴试验的非饱和黄土吸应力强度参数确定 [J]. 张新婷,李同录,邢鲜丽,李萍. 工程地质学报 . 2017(01)
非饱和土脱湿与吸湿水力特性对比研究 [J]. 冯立,张茂省,孙萍萍,董英,葛瑞华. 水文地质工程地质 . 2016(02)
非饱和黄土干湿循环土水特征曲线试验及渗透系数预测 [J]. 刘朋飞,殷跃平,李滨,孙一博. 中国地质灾害与防治学报 . 2015(04)
基于吸应力的非饱和黄土抗剪强度研究 [J]. 袁志辉,倪万魁,刘茹,李焕焕. 合肥工业大学学报(自然科学版) . 2015(05)
非饱和黄土强度参数的试验研究 [J]. 邢鲜丽,李同录,巨昆仑,付昱凯,习羽. 工程地质学报 . 2015(02)
土-水特征曲线预测非饱和土的抗剪强度对比研究 [J]. 郭利娜,胡斌,宋友建,张国超. 工程地质学报 . 2013(06)
非饱和黄土吸力与抗剪强度的试验研究 [J]. 员康锋,宿钟鸣,孙志杰. 重庆交通大学学报(自然科学版) . 2013(05)
非饱和黄土土-水特征曲线与渗透系数Childs & Collis-Geroge模型预测 [J]. 李萍,李同录,王红,梁燕. 岩土力学 . 2013(S2)
吸力路径对非饱和土力学性质的影响 [J]. 宋友建,胡新丽,郭利娜,张国超. 水文地质工程地质 . 2013(05)
甘肃永靖黑方台地区灌溉诱发型滑坡发育特征及力学机制 [J]. 朱立峰,胡炜,贾俊,马建全,毕俊擘,孙巧银. 地质通报 . 2013(06)
非饱和黄土基质吸力的滤纸法测试 [J]. 唐东旗,彭建兵,孙伟青. 煤田地质与勘探 . 2012(05)
考虑密度与干湿循环影响的黄土土水特征曲线 [J]. 赵天宇,王锦芳. 中南大学学报(自然科学版) . 2012(06)
考虑饱和-非饱和渗流作用的重庆奉节鹤峰乡场镇滑坡稳定性分析 [J]. 李俊业,唐红梅,陈洪凯,曾蓉. 中国地质灾害与防治学报 . 2010(04)
原状非饱和黄土的三轴试验研究 [J]. 李永乐,张红芬,佘小光,侯进凯,杨利乐. 岩土力学 . 2008(10)
增湿路径对非饱和土水气渗透系数的影响研究 [J]. 刘奉银,张昭. 水利学报 . 2008(08)
土水特征曲线的通用数学模型研究 [J]. 戚国庆,黄润秋. 工程地质学报 . 2004(02)
黄土状填土应力相关的土水特征曲线及其强度 [D]. 刘新华. 太原理工大学 2012
Residual shear strength of unsaturated soils via suction-controlled ring shear testing [J] . Laureano R. Hoyos,Claudia L. Velosa,Anand J. Puppala. Engineering Geology . 2014
Suction stress and its application on unsaturated direct shear test under constant volume condition [J] . B.S. Kim,S. Shibuya,S.W. Park,S. Kato. Engineering Geology . 2013
Field testing of irrigation effects on the stability of a cliff edge in loess, North-west China [J] . L. Xu,F.C. Dai,L.G. Tham,X.B. Tu,H. Min,Y.F. Zhou,C.X. Wu,K. Xu. Engineering Geology . 2011 (1)
Suction Stress Characteristic Curve for Unsaturated Soil [J] . Ning Lu,William J. Likos. Journal of Geotechnical and Geoenvironmental Engi . 2006 (2)
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