中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 地质与地球物理研究所
  3. 中国科学院地质与地球物理研究所
  4. 中国科学院页岩气与地质工程重点实验室
Strain-softening failure mode after the post-peak as a unique mechanism of ruptures in a frozen soil-rock mixture

文献类型：期刊论文

作者Li, Zhiqing1,2,3; Hu, Feng1,2,3; Qi, Shengwen1,2,3; Hu, Ruilin1,2,3
刊名ENGINEERING GEOLOGY
出版日期2020-09-05
卷号274页码:11
ISSN号0013-7952
关键词Frozen soil rock mixture Uniaxial compression strength Freezing temperature Volumetric block proportion Ice content Acoustic emission
DOI10.1016/j.enggeo.2020.105725
英文摘要A large number of traffic systems in China pass through a large area of frozen soil, most of which contains frozen soil-rock mixtures (FSRMs). For a profound understanding of the mechanical behaviours and damage mechanisms of geotechnical and geoenvironmental projects, it is necessary to understand the stress-strain characteristics and failure modes of FSRMs. This study focuses on the uniaxial compression strength (UCS), Young's modulus, and complete stress strain curve under loading, considering the post-peak behaviour. More than 250 FSRM specimens were tested for UCS evaluations, while considering the effects of different freezing temperatures (-5, -10, -20, -30, and -40 degrees C), initial water contents (15.0, 25.0, and 30.0%), and volumetric block proportions (0, 30, 40, 50, and 100%). The stress-strain curve of the FSRM was characterised by six distinct stress levels and deformation stages, different from those of rock or soil in the normal state. Particularly, the turning point from volume compression to expansion was observed after the post-peak, at which superficial cracks were initiated. Ice crystals provided ductility of the FSRM and maximised its load capacity to prevent premature cracks on the FSRM surface. The block stone hindered the linear propagation of cracks. The failure patterns of the FSRM for the UCS evaluation could be classified into four types. The UCS was influenced by mainly the strength of the mixture composed of ice crystals and soil particles and friction and occlusal strength between blocks. Notably, the gradual thawing of the FSRM might cause the largest deformation at the bottom of the active layer in summer and autumn, according to the experimental results. Thus, it is very important to understand the strength characteristics, deformation stages, and failure patterns associated with the geomechanical behaviour of the FSRM for engineering design and applications in a permafrost region.
WOS关键词FREEZE-THAW ACTION ; SHEAR-STRENGTH ; BEHAVIOR ; WATER ; SENSITIVITY ; INITIATION ; DEPOSITS ; FRACTURE
资助项目Second Tibetan Plateau Scientific Expedition and Research (STEP) program[2019QZKK0904] ; Chinese Academy of Sciences Key Deployment Project[KFZD-SW-422] ; Youth Innovation Promotion Association CAS[2017092] ; National Natural Science Foundation of China[41672316] ; Science and Technology Project of Yunnan Provincial Transportation Department[2016-160] ; International Cooperation Program of Chinese Academy of Sciences[131551KYSB20180042]
WOS研究方向Engineering ; Geology
语种英语
出版者ELSEVIER
WOS记录号WOS:000558028500008
资助机构Second Tibetan Plateau Scientific Expedition and Research (STEP) program ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program ; Chinese Academy of Sciences Key Deployment Project ; Chinese Academy of Sciences Key Deployment Project ; Chinese Academy of Sciences Key Deployment Project ; Chinese Academy of Sciences Key Deployment Project ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Project of Yunnan Provincial Transportation Department ; Science and Technology Project of Yunnan Provincial Transportation Department ; Science and Technology Project of Yunnan Provincial Transportation Department ; Science and Technology Project of Yunnan Provincial Transportation Department ; International Cooperation Program of Chinese Academy of Sciences ; International Cooperation Program of Chinese Academy of Sciences ; International Cooperation Program of Chinese Academy of Sciences ; International Cooperation Program of Chinese Academy of Sciences ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program ; Chinese Academy of Sciences Key Deployment Project ; Chinese Academy of Sciences Key Deployment Project ; Chinese Academy of Sciences Key Deployment Project ; Chinese Academy of Sciences Key Deployment Project ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Project of Yunnan Provincial Transportation Department ; Science and Technology Project of Yunnan Provincial Transportation Department ; Science and Technology Project of Yunnan Provincial Transportation Department ; Science and Technology Project of Yunnan Provincial Transportation Department ; International Cooperation Program of Chinese Academy of Sciences ; International Cooperation Program of Chinese Academy of Sciences ; International Cooperation Program of Chinese Academy of Sciences ; International Cooperation Program of Chinese Academy of Sciences ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program ; Chinese Academy of Sciences Key Deployment Project ; Chinese Academy of Sciences Key Deployment Project ; Chinese Academy of Sciences Key Deployment Project ; Chinese Academy of Sciences Key Deployment Project ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Project of Yunnan Provincial Transportation Department ; Science and Technology Project of Yunnan Provincial Transportation Department ; Science and Technology Project of Yunnan Provincial Transportation Department ; Science and Technology Project of Yunnan Provincial Transportation Department ; International Cooperation Program of Chinese Academy of Sciences ; International Cooperation Program of Chinese Academy of Sciences ; International Cooperation Program of Chinese Academy of Sciences ; International Cooperation Program of Chinese Academy of Sciences ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program ; Chinese Academy of Sciences Key Deployment Project ; Chinese Academy of Sciences Key Deployment Project ; Chinese Academy of Sciences Key Deployment Project ; Chinese Academy of Sciences Key Deployment Project ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Project of Yunnan Provincial Transportation Department ; Science and Technology Project of Yunnan Provincial Transportation Department ; Science and Technology Project of Yunnan Provincial Transportation Department ; Science and Technology Project of Yunnan Provincial Transportation Department ; International Cooperation Program of Chinese Academy of Sciences ; International Cooperation Program of Chinese Academy of Sciences ; International Cooperation Program of Chinese Academy of Sciences ; International Cooperation Program of Chinese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/97622]  
专题地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者Li, Zhiqing; Qi, Shengwen
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Li, Zhiqing,Hu, Feng,Qi, Shengwen,et al. Strain-softening failure mode after the post-peak as a unique mechanism of ruptures in a frozen soil-rock mixture[J]. ENGINEERING GEOLOGY,2020,274:11.
APA Li, Zhiqing,Hu, Feng,Qi, Shengwen,&Hu, Ruilin.(2020).Strain-softening failure mode after the post-peak as a unique mechanism of ruptures in a frozen soil-rock mixture.ENGINEERING GEOLOGY,274,11.
MLA Li, Zhiqing,et al."Strain-softening failure mode after the post-peak as a unique mechanism of ruptures in a frozen soil-rock mixture".ENGINEERING GEOLOGY 274(2020):11.

入库方式： OAI收割

来源：地质与地球物理研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。