Study on Permeability Characteristics of Granites with Different Degrees of Weathering

3rd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Chen, Lingqiang^1 ; Hu, Wenyi^1 ; Zhu, Liubing^1 ; Feng, Yong^2 ; Min, Youwei^2^3 ; Liu, Lingfeng^2^3

Guangzhou Metro Group Co., Ltd., China^1

China Railway 19 Bureau Group Co., Ltd., China^2

China University of Geosciences, Hubei Province, Wuhan

430074, China^3

关键词: Deformation Characteristics;    Degree of weatherings;    Drainage structures;    Groundwater environment;    Microstructure observation;    Permeability characteristics;    Theoretical calculations;    Tunnel construction;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/300/2/022160/pdf
DOI  :  10.1088/1755-1315/300/2/022160

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In Guangzhou Metro line 21 tunnel construction process, weathered granite shows diversification in strength, deformation characteristics and permeability characteristics. The rock mass permeability coefficient is the core parameter necessary in the construction, and the definition of its value directly affects the accuracy of the calculation in design of tunnel anti-drainage structure and the negative effect evaluation of groundwater environment. With on-site and indoor tests, theoretical calculations, microstructure observations and mineral analysis, the permeability characteristics of granites in different degrees of weathering is studied. The variation of the final permeability characteristics is described. The permeability of granite does not increase unidirectionally as the degree of weathering deepens.