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Influence of water and rock particle contents on the shear behaviour of a SRM

Transportation Safety and Environment 2020年第1期2卷 29-43页

作者： Longqi Liu Xuesong Mao Yajun Xiao Tiequan Wang Menglan Nie School of Highway Chang’an UniversityMiddle Section of Nan’er Huan Road710064 Xi’an CityChina Department of Civil&Environmental Engineering University of AlbertaDonadeo Innovation Centre for Engineering9211116 St.EdmontonABT6G 1H9Canada School of Management Shaanxi Railway InstituteNo.1 east section of Zhanbei StreetLinwei district714000 Weinan CityChina Department of Railway Engineering Shaanxi Railway InstituteNo.1 east section of Zhanbei StreetLinwei district714000 Weinan CityChina Department of Architectural Engineering Shandong Xiandai UniversityNo.20288 Jingshidong Road250002 Jinan CityChina

The contents of both water and rock particles are important factors affecting the mechanical strength of a soil–rock mixture(SRM)filled subgrade in the western mountainous area of ***,the purpose of this paper is to study the mechanisms of reconstituted landslide deposit samples with different water and rock particle contents by analysing the characteristics of shear strength,volumetric strain and‘jumping’phenomenon via large-scale direct shear *** results show that the influence of water content on shear strength is greater than the influence of rock particle content under a lower normal stress,and the results are reversed in the case of a higher normal *** effect of water content on the equivalent cohesion is bigger,especially for the sample with a high rock particle *** friction angle of the specimen with same water content increases with the increasing rock particle content,but when the number of rock particles increases to a certain extent,there is a little effect on the friction ***,the friction angle decreases with increasing water content at the same rock particle *** with the same rock particle content change from dilation to compression with increasing water ***,the continuous stage of the‘intense jumping’at different water content has been ***‘jumping’phenomenon of samples with low water and rock particle content will first strengthen and then weaken the samples with increasing normal stress.

关键词： soil–rock mixture rock particle content water content shear strength ‘jumping’phenomenon

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