Study on GMZ bentonite-sand mixture by undrained triaxial tests

doi:10.1051/e3sconf/20160918006

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	Study on GMZ bentonite-sand mixture by undrained triaxial tests
	Sun, Wen-jing 1,2; Chen, Chao 1; Liu, Shi-qing 1; Sun, De-an 1; Liang, Xue-hai 1; Tan, Yun-Zhi 3; Fatahi, Behzad 4
	2016
会议日期	SEP 12-14, 2016
会议地点	Paris, FRANCE
卷号	9
DOI	10.1051/e3sconf/20160918006
页码	-
英文摘要	It is particularly necessary to study the deformation, strength and the changes of pore water pressure of bentonite-based buffer/backfill materials under the undrained condition. A series of isotropic compression tests and triaxial shear tests under undrained conditions were conducted on the compacted saturated/unsaturated GMZ bentonite-sand mixtures with dry mass ratio of bentonite/sand of 30:70. During the tests, the images of the sample were collected by photographic equipment and subsequently were cropped, binarized and centroids marked by image processing technique. Based on identification of the variation of the position of marked centroids, the deformation of the sample can be determined automatically in real-time. Finally, the hydro-mechanical behaviour of saturated and unsaturated bentonite-sand mixtures under the undrained condition can be obtained. From results of triaxial shear tests on unsaturated samples under constant water content, inflated volumetric deformation transforms to contractive volumetric deformation due to the increase of the confining pressure and lateral expansion deformation are observed due to the increase in the shearing stress. Moreover, the net mean stress affects the initial stiffness, undrained shear strength and deformation of the sample during the undrained shear tests.
会议录	3RD EUROPEAN CONFERENCE ON UNSATURATED SOILS - E-UNSAT 2016
会议录出版者	E D P SCIENCES
会议录出版地	CEDEX A
语种	英语
WOS研究方向	Engineering
WOS记录号	WOS:000387533300173
内容类型	会议论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4886]
专题	岩土力学所知识全产出_会议论文国家重点实验室知识产出_会议论文
作者单位	1.Shanghai Univ, Dept Civil Engn ; 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; 3.China Three Gorges Univ, Coll Civil Engn & Architecture ; 4.Univ Technol Sydney, Fac Engn & IT, Ctr Built Infrastruct Res, Sch Civil & Environm Engn
推荐引用方式 GB/T 7714	Sun, Wen-jing,Chen, Chao,Liu, Shi-qing,et al. Study on GMZ bentonite-sand mixture by undrained triaxial tests[C]. 见:. Paris, FRANCE. SEP 12-14, 2016.