物质组构特征对片岩冻融损伤劣化的影响

王章琼; 晏鄂川

doi:10.11779/CJGE2015S2018

物质组构特征对片岩冻融损伤劣化的影响 English Version

王章琼¹,
晏鄂川²

1. 武汉工程大学资源与土木工程学院,湖北武汉 430073; 2. 中国地质大学（武汉）工程学院,湖北武汉 430074

基金项目: 交通运输行业联合科技攻关项目（2010-353-342-260）; 武; 汉工程大学科学研究基金项目（K201473）

详细信息

作者简介:
王章琼(1984- ),男,讲师,主要从事岩土及地下工程等方面的教学和科研。

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出版历程
- 收稿日期: 2015-03-25
- 发布日期: 2015-07-24

Influence of material composition and structural characteristics of rock on freeze-thaw damage and deterioration of schist

WANG Zhang-qiong¹,
YAN E-chuan²

1. School of Resource and Civil Engineering, Wuhan Institute of Technology, Wuhan 430073, China; 2. Faculty of Engineering, China University of Geosciences, Wuhan 430074, China

摘要

摘要: 目前对于岩石冻融损伤影响因素的研究主要集中在外因,而忽视了岩石物质组成、细观结构等内因。以鄂西北十房高速通省隧道武当群片岩为例,通过室内冻融循环、单轴压缩、矿物成分分析、切片偏光显微镜测试等试验,对比分析了物质组构特征（矿物成分及矿物颗粒排列情况）对片岩冻融损伤劣化特性的影响。结果表明,物质组构特征的影响主要体现在两个方面：①片理间充填矿物颗粒大小及其分布情况;②云母定向排列程度。前者对冻融损伤的影响体现在：当矿物颗粒粒径较大或分布较零散时,对片理的变形具有较强的阻挡和约束作用;反之,对片理变形的阻挡和约束作用较弱。后者对冻融损伤的影响体现在：云母定向排列程度越高,冻融循环引起的损伤劣化效果越明显,反之越不明显。研究结果对于从内因角度分析岩石冻融损伤劣化影响因素具有一定借鉴意义。
- 物质组构 /
- 细观结构 /
- 冻融循环 /
- 片岩 /
- 损伤机理
Abstract: Currently, the researches on influence factors of freeze-thaw damage of rock mainly focus on external cause, while ignoring the internal causes, such as material composition, microstructure, etc, Taking Wudang Group schist in Tongsheng tunnel,Shiyan-Fanging expressway, northwest of Hubei Province as an example, the influences of material composition and structural characteristics (mineralogy and arrangement of mineral particles) on freeze-thaw damage degradation characteristics of schist are compared and analyzed, through indoor tests such as freeze-thaw cycles, uniaxial compression, mineral composition analysis, sliced polarizing microscope tests. The results show that the influences of material composition and structural characteristics are mainly the following two aspects: (1) Particle size and distribution of mineral filled in foliation; (2) Situation of mica orientation. For the former aspect when the particle size of mineral is greater or its distribution is scattered,the particle mineral has strong blocking and binding effect on the deformation of foliation. On the contrary,the blocking and binding effect is weak. For the latter aspect, when the degree of orientation of mica arranged is high, the effect of damage caused by freeze-thaw cycles is more obvious. On the contrary,the effect is not obvious. The results have certain reference significance to the researches on influence factors of rock damage caused by freeze-thaw cycles from internal angle.
- material composition and structure /
- microstructure /
- freeze-thaw cycle /
- schist /
- damage mechanism

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参考文献(13)

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