岩石/结构面劣化导致巴东组软硬互层岩体强度劣化的作用机制

亢金涛; 吴琼; 唐辉明; 胡新丽; 范亮亮; 张抒; 易鑫

doi:10.3799/dqkx.2019.110

Volume 44 Issue 11

Nov. 2019

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Article Navigation > Earth Science > 2019 > 44(11): 3950-3960

Kang Jintao, Wu Qiong, Tang Huiming, Hu Xinli, Fan Liangliang, Zhang Shu, Yi Xin, 2019. Strength Degradation Mechanism of Soft and Hard Interbedded Rock Masses of Badong Formation Caused by Rock/Discontinuity Degradation. Earth Science, 44(11): 3950-3960. doi: 10.3799/dqkx.2019.110

Citation:

Kang Jintao, Wu Qiong, Tang Huiming, Hu Xinli, Fan Liangliang, Zhang Shu, Yi Xin, 2019. Strength Degradation Mechanism of Soft and Hard Interbedded Rock Masses of Badong Formation Caused by Rock/Discontinuity Degradation. Earth Science, 44(11): 3950-3960. doi: 10.3799/dqkx.2019.110

Citation:

Kang Jintao, Wu Qiong, Tang Huiming, Hu Xinli, Fan Liangliang, Zhang Shu, Yi Xin, 2019. Strength Degradation Mechanism of Soft and Hard Interbedded Rock Masses of Badong Formation Caused by Rock/Discontinuity Degradation. Earth Science, 44(11): 3950-3960. doi: 10.3799/dqkx.2019.110

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Strength Degradation Mechanism of Soft and Hard Interbedded Rock Masses of Badong Formation Caused by Rock/Discontinuity Degradation

doi: 10.3799/dqkx.2019.110

Kang Jintao^{1
,
,},
Wu Qiong^{1
,
,
,},
Tang Huiming¹,
Hu Xinli¹,
Fan Liangliang¹,
Zhang Shu²,
Yi Xin¹

1.
Faculty of Engineering, China University of Geosciences, Wuhan 430074, China
2.
Three Gorges Research Center for Geo-Hazards, Ministry of Education, China University of Geosciences, Wuhan 430074, China

Received Date: 2018-02-21
Publish Date: 2019-11-15

Abstract

Abstract

Strength degradation mechanism of soft and hard interbedded rock mass of Badong Formation caused by rock/discontinuity degradation is the key issue to reveal progressive strength deterioration mechanism of soft and hard interbedded rock mass of Badong Formation in hydro-fluctuation belt of reservoir bank and to evaluate the stability of reservoir bank slope in the Three Gorges area. Sandstone and silty mudstone of the typical sliding-prone soft and hard interbedded rock masses of Badong Formation in the Three Gorges area were taken as the research object to conduct uniaxial compression numerical test, considering the deterioration of rock/discontinuity parameters under the condition of drying-wetting cycle, the contribution of soft rock/hard rock/bedding plane degradation to the uniaxial compression strength degradation of soft and hard interbedded rock masses in the Badong Formation and its relationship with the dip angle are analyzed. The results indicate that the influence of soft rock/hard rock/bedding plane deterioration on the uniaxial compression strength degradation of soft and hard interbedded rock mass in the Badong Formation has obvious difference under different dip angles. The dip angle is divided into soft rock control zone, soft rock-hard rock-bedding plane common control zone, slip failure zone along the bedding plane and hard rock control zone based on their contribution. The results reveal the mechanism of strength degradation of soft and hard interbedded rock mass caused by rock/discontinuity deterioration and the influence of dip angle, which provides the basis for revealing the progressive strength deterioration mechanism of soft and hard interbedded rock masses of the Badong Formation in hydro-fluctuation belt of reservoir bank.
- Badong Formation,
- soft and hard interbedded rock mass,
- strength deterioration,
- uniaxial compressive strength,
- dip angle,
- engineering geology

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References(58)

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