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  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
Microstructural changes and micro-macro-relationships of an intact, compacted and remolded loess for land-creation project from the Loess Plateau

文献类型：期刊论文

作者Li, Zhiqing1,2,3; Qi, Zhiyu1,2,3; Qi, Shengwen1,2,3; Zhang, Linxin1,2,3; Hou, Xiaokun1,2,3
刊名ENVIRONMENTAL EARTH SCIENCES
出版日期2021-09-01
卷号80期号:17页码:18
关键词Loess Paleosol Microstructure Pore size distribution Mercury intrusion porosimetry Scanning electron microscopy
ISSN号1866-6280
DOI10.1007/s12665-021-09872-4
英文摘要The Loess Plateau accounts more than 6% of China's land area and 45% of Shaanxi Province. The land-creation project could double the city's current area. However, the behavior of loess, and in particular inadequate compacted loess, can have significant implications on the safe and reliable operation of man-made infrastructure. The mechanical behavior and collapsibility of intact, in situ compacted and remolded loess in lab, which are widely recognized as fundamentally different materials, were associated with the microstructure. There is limited understanding of micro-macro-relationships in the three fine-grained loess. This study focuses on the microstructural changes and micro-macro-relationships of an intact, compacted and remolded loess from complex land-creation project. A comprehensive microstructural comparisons about PSDs, micrographs and quantitative evaluation for intact and remolded loess from an 80-m-high section of the sedimentary strata, and compacted loess from a highly filled exploratory well are presented and discussed in this paper. The results show that both the intact and compacted loess exhibit trimodal characteristics in their PSDs, while there are bimodal/unimodal characteristics of the PSD for the remolded loess. The compressibility and the specific surface area of the remolded loess are far less than those of the intact or compacted loess. This is further evidence the remolded loess is not suitable to study the collapsibility and compressibility instead of intact loess. However, compared with the intact loess, the compacted loess shows the same pore and particle flocculation structure characteristics for samples at higher density (> 1710 kg/m(3) + 10 kg/m(3)). Under high-energy impact load, particles perform the breakdown, from round, coarse and disordered particles gradually to flaky, fine and ordered particles, which are different from traditional research results. The threshold value of dry density 1710 kg/m(3) + 10 kg/m(3) can be defined the boundary and micro-macro-relationships among intact, compacted and remolded loess. The results are of great importance to understand the microstructure characteristics and improve the engineering construction safety in loess areas.
WOS关键词COLLAPSE BEHAVIOR ; SOILS ; CHINA ; COLLAPSIBILITY ; EVOLUTION
资助项目National Natural Science Foundation of China[41790442] ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK0904] ; Yunnan Province Key Research and Development Program[202103AA080013] ; Youth Innovation Promotion Association CAS[2017092] ; International Cooperation Program of Chinese Academy of Sciences[131551KYSB20180042]
WOS研究方向Environmental Sciences & Ecology ; Geology ; Water Resources
语种英语
WOS记录号WOS:000687680000007
出版者SPRINGER
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Yunnan Province Key Research and Development Program ; Yunnan Province Key Research and Development Program ; Yunnan Province Key Research and Development Program ; Yunnan Province Key Research and Development Program ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; 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 ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Yunnan Province Key Research and Development Program ; Yunnan Province Key Research and Development Program ; Yunnan Province Key Research and Development Program ; Yunnan Province Key Research and Development Program ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; 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 ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Yunnan Province Key Research and Development Program ; Yunnan Province Key Research and Development Program ; Yunnan Province Key Research and Development Program ; Yunnan Province Key Research and Development Program ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; 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 ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Yunnan Province Key Research and Development Program ; Yunnan Province Key Research and Development Program ; Yunnan Province Key Research and Development Program ; Yunnan Province Key Research and Development Program ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; 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/132A11/102581]  
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
作者单位1.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Li, Zhiqing,Qi, Zhiyu,Qi, Shengwen,et al. Microstructural changes and micro-macro-relationships of an intact, compacted and remolded loess for land-creation project from the Loess Plateau[J]. ENVIRONMENTAL EARTH SCIENCES,2021,80(17):18.
APA Li, Zhiqing,Qi, Zhiyu,Qi, Shengwen,Zhang, Linxin,&Hou, Xiaokun.(2021).Microstructural changes and micro-macro-relationships of an intact, compacted and remolded loess for land-creation project from the Loess Plateau.ENVIRONMENTAL EARTH SCIENCES,80(17),18.
MLA Li, Zhiqing,et al."Microstructural changes and micro-macro-relationships of an intact, compacted and remolded loess for land-creation project from the Loess Plateau".ENVIRONMENTAL EARTH SCIENCES 80.17(2021):18.

入库方式： OAI收割

来源：地质与地球物理研究所

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