Experimental study on the hydro-mechanical behavior of Boom clay

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• 作者：Hong-Dan Yu^a ; Wei-Zhong Chen^a ; ^b ; ^{hdyu@whrsm.ac.cn} ; Shan-Po Jia^c ; Jun-Jie Cao^a ; Xiang-Ling Li^d
• 关键词：Boom clay ; Hydro-mechanical behavior ; Experimental studies ; Microstructure
• 刊名：International Journal of Rock Mechanics and Mining Sciences
• 出版年：2012
• 期刊代码：33_13651609
• 类别：civ
• 出版时间：July, 2012
• 卷：53
• 期：Complete
• 页码：159-165
• 文件大小：1330 K

摘要

In the context of research into deep nuclear waste disposal, Boom clay, a stiff soil from the Underground Research Laboratory in Mol, Belgium, has been studied in various works. In this paper, containing X-ray diffraction tests, oedometer tests, consolidated undrained shearing (CUS) tests and scanning electron microscopic (SEM) tests, a series of experimental studies intended to study the hydro-mechanical behavior and micro fabric of Boom clay are presented. X-ray diffraction tests and SEM tests further highlight the high content of clay mineral of Boom clay (about 60%in average). Preconsolidation pressure, which is about 5.0 MPa, was determined by oedometer tests. High swelling property under hydro-mechanical coupling effect has been investigated on the clay samples during the CUS test, and also high viscous potential has been represented under shearing rate of 20 渭m/min. SEM tests show that the microstructure of Boom clay arranged more directional and denser, and it can be observed clearly through the microstructure variation of pores and fissures.