NDLI: Coupling analysis of unsteady seepage and stress fields in discrete fractures network of rock mass in dam foundation

Content Provider	Springer Nature Link
Author	Chai, JunRui Xu, WeiSheng
Copyright Year	2011
Abstract	The drag force of water flow through single fracture and the coupling characteristics of seepage and stress in single fracture surface are analyzed, and a three dimensional model of coupled unsteady seepage and stress fields is proposed. This model is used to the analysis of foundation rock mass of a high dam. If the coupling effects are considered, the changes of boundary heads have less influence on the inner head of rock mass, and the strong permeability of main fractures appears. If the coupling effects are not considered, the fractures distribution affects the inner head more greatly. When the upstream water head declines, the inner head of dam foundation slightly declines and the hydraulic gradient distribution becomes smoother. A bigger upstream water level declining velocity has a stronger lag effect, meanwhile the values of stress components change more greatly. Therefore the upstream water level declining velocity directly affects the stability of rock mass in dam foundation and we should take into account the above factors to make sure the safety of the dam during reservoir level fluctuation period.
Starting Page	133
Ending Page	139
Page Count	7
File Format	PDF
ISSN	16747321
Journal	Science in China Series E: Technological Sciences
Volume Number	54
Issue Number	1
e-ISSN	1862281X
Language	English
Publisher	SP Science China Press
Publisher Date	2011-11-19
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	hydraulic engineering unsteady seepage stress coupling fractures network rock mass Engineering
Content Type	Text
Resource Type	Article
Subject	Engineering Materials Science

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