Mechanical Properties of Strongly Weathered Rock-Soil Mixtures with Different Rock Block Contents
文献类型：期刊论文
| 作者 | Wei, Hou-Zhen3; Xu, Wen-Jie1; Xu, Xiao-Feng2; Meng, Qing-Shan3; Wei, Chang-Fu3 |
| 刊名 | INTERNATIONAL JOURNAL OF GEOMECHANICS
 |
| 出版日期 | 2018 |
| 卷号 | 18期号:5页码:- |
| 关键词 | Strongly weathered rock Soil-rock mixture (S-RM) Rock block content Particle breakage Direct-shear test |
| ISSN号 | 1532-3641 |
| DOI | 10.1061/(ASCE)GM.1943-5622.0001131 |
| 英文摘要 | Although soil-rock mixtures (S-RMs) exist extensively on Earth's surface, their mechanical behaviors remain elusive. In this study, a series of large-scale direct-shear tests was conducted to investigate the mechanical behaviors of S-RMs composed of weathered basalt with different rock block contents, including stress-strain relationship, dilatancy, particle breakage, and shear strength. The results indicate that the S-RM shows more and more pronounced strain-hardening behavior as its rock block content increases. For S-RMs with different rock block contents, there is a power law relationship between the stress ratio and the displacement-increment ratio before the peak shear strength is reached. The horizontal shear stress depends strongly on the volumetric strain of the S-RM. Namely, volume compression results in closer contacts among particles, enhancing the strength and strain-hardening behavior of the S-RM, whereas volume expansion disperses particles, reducing the strength and enhancing the strain-softening behavior. It is also shown that particle breakage can exert significant control over the mechanical properties of the S-RM. Particle breakage becomes more and more severe as the rock block content and the normal stress increase, and then it reaches a critical state. In addition, it is remarkable that the relationship between the shear strength and the normal stress follows a power law instead of a linear one. (C) 2018 American Society of Civil Engineers. |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000427957200012 |
| 出版者 | ASCE-AMER SOC CIVIL ENGINEERS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/4262]  |
| 专题 | 岩土力学所知识全产出_期刊论文 国家重点实验室知识产出_期刊论文 |
| 作者单位 | 1.Tsinghua Univ, Dept Hydraul Engn, State Key Lab Hydrosci & Hydraul Engn; 2.Zhejiang Design Inst Water Conservancy & Hydroele 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; |
| 推荐引用方式 GB/T 7714 | Wei, Hou-Zhen,Xu, Wen-Jie,Xu, Xiao-Feng,et al. Mechanical Properties of Strongly Weathered Rock-Soil Mixtures with Different Rock Block Contents[J]. INTERNATIONAL JOURNAL OF GEOMECHANICS,2018,18(5):-. |
| APA | Wei, Hou-Zhen,Xu, Wen-Jie,Xu, Xiao-Feng,Meng, Qing-Shan,&Wei, Chang-Fu.(2018).Mechanical Properties of Strongly Weathered Rock-Soil Mixtures with Different Rock Block Contents.INTERNATIONAL JOURNAL OF GEOMECHANICS,18(5),-. |
| MLA | Wei, Hou-Zhen,et al."Mechanical Properties of Strongly Weathered Rock-Soil Mixtures with Different Rock Block Contents".INTERNATIONAL JOURNAL OF GEOMECHANICS 18.5(2018):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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