气候变化领域集成服务门户(CCPortal): Experimental Study on Electric Resistivity Characteristics of Compacted Loess under Different Loads and Drying-Wetting Cycles

CCPortal

DOI	10.1155/2021/6672430
	Experimental Study on Electric Resistivity Characteristics of Compacted Loess under Different Loads and Drying-Wetting Cycles
	Zhou, Yu; Li, Guoyu; Ma, Wei; Chen, Dun; Wang, Fei; Mao, Yuncheng; Du, Qingsong; Zhang, Jun; Tang, Liyun
通讯作者	Li, GY (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Da Xinganling Observat & Res Stn Frozen Ground En, Jagdaqi 165000, Heilongjiang, Peoples R China. ; Li, GY (通讯作者)，Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China.
发表日期	2021
ISSN	1687-8086
EISSN	1687-8094
卷号	2021
英文摘要	Densely compacted loess foundations of many man-made infrastructures are often exposed to various loads and extreme weathering processes (e.g., drying-wetting cycles), which significantly deteriorate their mechanical properties. Traditional methods applied to characterize soil engineering properties are primarily based on visual inspections, point sensors, or destructive approaches, the results of which often have relatively high costs and cannot provide large-area coverage. The electrical resistivity method is a reasonable alternative that provides a nondestructive, sensitive, and continuous evaluation of the soil physical properties. Thus, the relationships between electrical resistivity and soil strength should be understood, particularly for scenarios in which soils undergo significant loads and cycles of drying and wetting. In this study, a suite of laboratory tests simulating loads (consolidation tests, unconfined compression tests, and uniaxial cyclic unloading-reloading tests) and seasonal field conditions (drying-wetting cycle tests) were conducted to quantitatively assess their deterioration effects on the geophysical and geotechnical properties of compacted loess. The experimental results indicated that electric resistivity decreases with the increase in stress and then approaches a stable value after the stress becomes 200 kPa. During the uniaxial compression process, the electric resistivity corresponds to both the stress and strain of loess in real-time. The electrical resistivity of loess reflects plastic damage under uniaxial unloading-reloading tests, but it is deficient in representing the dissipated energy of loess. The electrical resistivity of loess samples increases as the number of drying-wetting cycles increases but decreases with increasing cycle numbers after stabilization under consolidation load. The electrical resistivity can effectively characterize the mechanical and deformation characteristics of loess samples under loads and drying-wetting cycles, exhibiting a certain potential for long-term monitoring of soil engineering properties.
语种	英语
WOS研究方向	Construction & Building Technology ; Engineering
WOS类目	Construction & Building Technology ; Engineering, Civil
WOS记录号	WOS:000617620500003
来源期刊	ADVANCES IN CIVIL ENGINEERING
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254477
作者单位	[Zhou, Yu; Li, Guoyu; Ma, Wei; Chen, Dun; Du, Qingsong; Zhang, Jun] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Da Xinganling Observat & Res Stn Frozen Ground En, Jagdaqi 165000, Heilongjiang, Peoples R China; [Zhou, Yu; Li, Guoyu; Ma, Wei; Du, Qingsong; Zhang, Jun] Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China; [Wang, Fei] Jiangsu Univ, Fac Civil Engn & Mech, Zhenjiang 212013, Jiangsu, Peoples R China; [Mao, Yuncheng] Northwest Minzu Univ, Coll Civil Engn, Lanzhou 730000, Peoples R China; [Tang, Liyun] Xian Univ Sci & Technol, Coll Architecture & Civil Engn, Xian 710054, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Yu,Li, Guoyu,Ma, Wei,et al. Experimental Study on Electric Resistivity Characteristics of Compacted Loess under Different Loads and Drying-Wetting Cycles[J]. 中国科学院西北生态环境资源研究院,2021,2021.
APA	Zhou, Yu.,Li, Guoyu.,Ma, Wei.,Chen, Dun.,Wang, Fei.,...&Tang, Liyun.(2021).Experimental Study on Electric Resistivity Characteristics of Compacted Loess under Different Loads and Drying-Wetting Cycles.ADVANCES IN CIVIL ENGINEERING,2021.
MLA	Zhou, Yu,et al."Experimental Study on Electric Resistivity Characteristics of Compacted Loess under Different Loads and Drying-Wetting Cycles".ADVANCES IN CIVIL ENGINEERING 2021(2021).