Collapsibility, composition, and microfabric of the coastal zone loess around the Bohai Sea, China

doi:10.1016/j.enggeo.2019.05.019

	Collapsibility, composition, and microfabric of the coastal zone loess around the Bohai Sea, China
	Zhang, Weipeng 1,2; Sun, Yongfu 3,4; Chen, Wenwu 1,2; Song, Yupeng 3,4; Zhang, Jingke 1,2
刊名	ENGINEERING GEOLOGY
	2019-07-26
卷号	257
关键词	Coastal zone loess Collapsibility Microfabric XRD MIP SEM
ISSN号	0013-7952
DOI	10.1016/j.enggeo.2019.05.019
英文摘要	Coastal loess is a special loess deposit that is distributed around the Bohai Sea. The primary objective of this study was to investigate the physical index, mineralogical characteristics and collapse potential of coastal loess. The secondary objective was to survey the effect of fine silt particles (particle size 5-10 mu m, 6.64-7.64 phi) on the collapse process. We tested the specific gravity, moisture content, dry density, Atterberg limits, grain size distribution, mineralogy, and collapsibility characteristics in a laboratory; generated scanning electron microscopy (SEM) images; and performed Mercury intrusion porosometry (MIP) tests. The results of this investigation indicated that coastal loess has a moderately severe collapse potential. The collapsibility coefficient decreases with an increase in the initial water content; it initially increases and then decreases with an increase in vertical pressure. As revealed by the MIP test, the collapse produces a smaller porosity, and the middle pores are primarily responsible for the collapse. The relationship of the collapsibility coefficient and particles with a diameter < 10 mu m reveals that fine silt particles (particle size 5-10 mu m, 6.64-7.64 phi) and clay particles (particle size < 5 mu m, > 7.64 phi) have the same tendency in terms of their effect on collapse. These results and analyses are important to improve the engineering construction safety in coastal zone loess areas and achieve a better understanding of loess properties compared with loess from a typical loess-paleosol section.
资助项目	Project of Aoshan Science and Technology Innovation[2015ASKJ03]
WOS关键词	COLLAPSE BEHAVIOR ; GEOTECHNICAL PROPERTIES ; SHAANXI PROVINCE ; REMOLDED LOESS ; FEATURES ; CLAY
WOS研究方向	Engineering ; Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000473121100009
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/24566]
专题	自然资源部第一海洋研究所
通讯作者	Chen, Wenwu
作者单位	1.Lanzhou Univ, Minist Educ China, Key Lab Mech Disaster & Environm Western China, 222 Tianshuinan Rd, Lanzhou 730000, Gansu, Peoples R China 2.Lanzhou Univ, Coll Civil Engn & Mech, 222 Tianshuinan Rd, Lanzhou 730000, Gansu, Peoples R China 3.Minist Nat Resources, Inst Oceanog 1, 6 Xianxialing Rd, Qingdao 266061, Shandong, Peoples R China 4.Pilot Natl Lab Marine Sci & Technol Qingdao, 1 Wenhai Rd, Qingdao 266061, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Weipeng,Sun, Yongfu,Chen, Wenwu,et al. Collapsibility, composition, and microfabric of the coastal zone loess around the Bohai Sea, China[J]. ENGINEERING GEOLOGY,2019,257.
APA	Zhang, Weipeng,Sun, Yongfu,Chen, Wenwu,Song, Yupeng,&Zhang, Jingke.(2019).Collapsibility, composition, and microfabric of the coastal zone loess around the Bohai Sea, China.ENGINEERING GEOLOGY,257.
MLA	Zhang, Weipeng,et al."Collapsibility, composition, and microfabric of the coastal zone loess around the Bohai Sea, China".ENGINEERING GEOLOGY 257(2019).