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Title: The microstructure characteristic of cohesive soil in inner shelf of the East China Sea and its engineering implication
Authors: Xu, Yuanqin
Li, Ping
Li, Peiying
Du, Jun
Liu, Lejun
Gao, Wei
Liu, Jie
Keywords: Inner shelf of the East China Sea;Cohesive soil;Physical-mechanical properties;Microstructure;Regression analysis
Issue Date: Mar-2019
Publisher: NISCAIR-CSIR, India
Abstract: In this paper, the microstructure images and parameters of the cohesive soil were obtained via scanning electron microscope testing technology and computer image processing technology. The physical-mechanical indexes of cohesive soil was obtained through geotechnical testing. The macro physical-mechanical indexes and microstructure parameters of cohesive soil in the inner shelf of the East China Sea were analysed by the regression analysis method; and the multiple regression equations between water content, liquid limit, compressibility coefficient, vane shear strength, micro-penetration resistance, medium diameter and the microstructure parameters were established. The results show that cohesive soils in the inner shelf of the East China Sea have three types of microstructure: Granular link-bond structure, flocculent link-bond structure and clay particle matrix structure. The physical indexes of cohesive soil mainly related to the microstructure parameters characterizing the size and number of pores, while the mechanical indexes, besides the size and number, also affected by the geometry of pores. Usually, the rounder the pore is and the more complicated the profile curve of pore is, the higher is the strength of cohesive soil. The results can provide theoretical reference for in-depth understanding the engineering properties of cohesive soil in the inner shelf of the East China Sea.
Page(s): 389-396
ISSN: 0975-1033 (Online); 0379-5136 (Print)
Appears in Collections:IJMS Vol.48(03) [March 2019]

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