[1]邓茂林,许强,韩蓓,等.武隆鸡尾山滑坡滑带软岩微观结构与流变特性[J].山地学报,2014,(02):233.
　DENG Maolin,XU Qiang,HAN Bei,et al.The Microscopic Structure and Rheological Characteristics of the Slip Zone Soft Rock of Jiweishan Landslide in Wulong of Chongqing，China[J].Mountain Research,2014,(02):233.
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武隆鸡尾山滑坡滑带软岩微观结构与流变特性()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2014年02期
页码:
233
栏目:
山地灾害
出版日期:
2014-02-01

文章信息/Info

Title:
The Microscopic Structure and Rheological Characteristics of the Slip Zone Soft Rock of Jiweishan Landslide in Wulong of Chongqing，China
作者:
邓茂林;许强;韩蓓;朱星;蔡国军;郑光;
地质灾害防治与地质环境保护国家重点实验室(成都理工大学)，四川 成都　610059
Author(s):
DENG Maolin; XU Qiang; HAN Bei; ZHU Xing; CAI Guojun; ZHENG Guang
State Key Laboratory of Geohazard Prevention and Geoenvironment Protection，Chengdu University of Technology，Chengdu 610059，China
关键词:
滑带软岩; 微观结构; 矿物组成; 流变特征; 长期强度
Keywords:
the slip zone soft rock; microscopic structure; mineral composition; rheological characteristics; longterm strength
分类号:
P642
文献标志码:
A
摘要:
利用理学DMAX-3C衍射仪(CuKa,Ni滤光)、偏光显微镜、扫描电镜(SEM)、岩石直接剪切蠕变试验系统等对武隆鸡尾山滑坡滑带软岩进行矿物成分、岩性鉴定并分析构造和组分,自然风干和饱水后两种状况的显微结构观察,并对其流变特性进行试验研究。其结果为:软弱带方解石含量占68%、有机质13%、滑石9%、蒙脱石5%、石英4%、白云石1%,滑动面的镜面物质没有变化。显微结构测试结果表明:自然风干后在扫描电镜下,样品中出现大量的线型擦痕、微孔隙和微裂隙,粘土矿物呈定向排列。充分饱水后试样出现新的微裂纹,并有扩张现象,孔隙明显增大,也较好的吻合了该滑坡滑动的一些基本事实。对直剪流变试验与快剪试验获得的抗...
Abstract:
The stress state and the intensity which would affect the activities of a landslide are determined by the type，material composition，microstructural features and formation mechanism and others of the slip zone. So the research of the landslide is promoted by the research of the slip zone. For this reason，the mineral composition and lithology of the slip zone soft rock of Jiweishan landslide in Wulong of Chongqing，China are identified by using of DMAX-3C diffractometer (light filtering by CuKa，Ni)，polarizing microscope，scanning electron microscope(SEM)，the rock direct shearing and creeping test system and etc.，and the structures，components and the microscopic structure of the natural dried or saturated water are analyzed，then the rheological properties are studied according to the experiments. The result shows the composition in weak slip zone: the content of calcite reaches -68%，the organic matter -13%，the talcum -9%，the montmorillonite -5%，the quartz -4% and the dolomite -1%. The mirror material composition of the sliding surface is not changed. The microstructure test shows that there are a large number of linear scratches，micropore，microfissure and the clay mineral directional arrangement in the natural dried samples in the scanning electron microscope. Besides，there are some microcracks and expansion in the slip surface of the fully saturated water sample，the porosity increases significantly，and new microcracks emerge，and also coincide with the basic facts of landslide movements. The rheological test results show that the longterm shear strength of the direct shear rheological test significantly decreases by compared to the parameters of the shear strength of the rapid shear tests，the friction coefficient decreases to 31.53%，the cohesion decreases to 3761%，and also the influence of rock cohesion on shear rheological properties is greater than its internal friction coefficient. These test results are consistent with the understanding results of the field landslide survey，and promoted the study of the landslide mechanism. Both microscopic structure of slip zone soft rock and rheological mechanical property play an important role in the promotion of landslide creep.

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备注/Memo

备注/Memo:
收稿日期(Received date)：2013-06-22；改回日期(Accepted): 2013-08-21。
基金项目（Foundation item）：国家重点基础研究发展计划（2013CB733200），国家杰出青年科学基金(41225011)，教育部长江学者特聘教授岗位资助。［The National Basic Research Program “973” Project of the Ministry of Science and Technology of the People’s Republic of China, No.2013CB733200，China National Science Fund for Distinguished Young Scholars, No. 41225011, Changjiang Scholars Professor positions funded.］
作者简介（Biography）：邓茂林(1980-), 男, 汉族, 四川宣汉人, 博士研究生, 主要从事地质灾害预测与防治方面的工作。［Deng Maolin(1980-)，male，Ph D，majoring in geological disaster prediction and prevention．］E-mail:dmltop@163.com
更新日期/Last Update: 1900-01-01