期刊论文

Disintegration Characteristics of Carbonaceous Mudstone Under Loading and Wet-dry Cycles

中文

中国公路学报

1001-7372

2019

32

9

22-31

10.19721/j.cnki.1001-7372.2019.09.002

51838001:国家自然科学基金 51878070:国家自然科学基金 51678074:国家自然科学基金 51578079:国家自然科学基金 :道路灾变防治 kfj170404:教育部工程研究中心 CX2018B528:湖南省研究生科研创新项目

本校为第一机构

针对炭质泥岩遇水易软化、破碎及崩解的特点,以广西六寨-河池高速公路沿线的炭质泥岩为例,开展荷载及干湿循环共同作用下炭质泥岩崩解特征试验,并采用扫描电镜、X线衍射等方法系统研究炭质泥岩崩解过程中颗粒的形态、质量、粒径分布特征,进而探讨炭质泥岩崩解机理。试验结果表明:随着干湿循环次数的增加,炭质泥岩崩解宏观上表现为大粒径崩解物逐渐消失,小粒径崩解物的含量逐渐增大,微观上表现为黏粒逐渐脱落并流失,片状结构逐渐转化为细长针状结构,同时孔隙不断扩大,直至贯通;炭质泥岩第1次干湿循环过程崩解最为强烈,5次干湿循环后崩解趋于稳定,试样的不均匀系数及曲率系数均随循环次数的增加呈...

Based on the characteristics of softening, breaking, and slaking with water, and taking the carbonaceous mudstone along the Liuzhai-Hechi section expressway as an example, tests on the disintegrating characteristics of carbonaceous mudstone under the combined actions of load and dry-wet cycles were conducted. The characteristics of particle morphology, mass, and size distribution in the disintegration process of carbonaceous mudstone were studied using scanning electron microscopy and X-ray diffraction. In addition, the disintegration mechanism...