An in-situ seepage testing method for fractured zones of rock mass

The permeability characteristics of rock mass discontinuities are important to hydropower station project stability. In this paper, a large-scale in-situ seepage testing method is proposed and used to test gentle-dip bedding faults (C3 zone) and steep faults (F14) in a hydropower station constructio...

Full description

Saved in:
Bibliographic Details
Published in:Quarterly journal of engineering geology and hydrogeology 2021-02, Vol.54 (1), p.1
Main Authors: Liu Sihong, Liu Sihong, Xu Siyuan, Xu Siyuan, Zhou Bin, Zhou Bin
Format: Article
Language:English
Subjects:
abutments
Asia
Baihetan Project
China
clastic sediments
clay
construction
dams
discontinuities
Engineering geology
Far East
faults
Field tests
fractured materials
Hydraulic gradient
hydraulics
Hydroelectric power
Hydroelectric power stations
In situ tests
Jinsha River
Permeability
Permeability coefficient
plasticity
power plants
Rock masses
Rocks
sediments
Seepage
Sichuan China
Stability
Stress
Testing
water pressure
Yunnan China
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The permeability characteristics of rock mass discontinuities are important to hydropower station project stability. In this paper, a large-scale in-situ seepage testing method is proposed and used to test gentle-dip bedding faults (C3 zone) and steep faults (F14) in a hydropower station construction field in China. The in-situ test results are compared to those of both undisturbed and reconstituted specimens. The comparison indicates that the largest critical hydraulic gradient and smallest seepage permeability coefficient are obtained via in-situ tests since they are performed under stress states that simulate the natural stress of the surrounding rock mass. The natural stress of the surrounding rock mass cannot be reflected in tests of undisturbed and reconstituted specimens.
ISSN:1470-9236
2041-4803
DOI:10.1144/qjegh2020-050