金佛山水库左岸岩质高边坡稳定性分析
|
摘要
以重庆市南川金佛山水库左岸岩质高边坡为例,采用极限平衡法、赤平极射投影图解法及工程地质分析法综合分析了原始边坡稳定性状况、设计开挖加固方案对边坡稳定性影响及地震作用下潜在滑坡破坏机制。结果表明,原始潜在滑坡上部为滑移—压致拉裂式破坏机制,下部为塑流—拉裂式破坏机制;开挖边坡前缘强风化、强卸荷岩体有利于边坡稳定,采用锚喷混凝土支护的设计加固方案效果显著;按基本烈度Ⅶ度进行工程抗震设防时边坡整体安全,大规模惯性失稳可能性较小。
Taking the high rocky slope at left bank of Jinfoshan reservoir in Chongqing City for an example,the original slope stability,the impact of excavation and reinforcement scheme on the slope stability and the potential landslide failure mechanism under action of earthquake are analyzed by using the limit equilibrium method,stereographic projection and engineering geological analysis.The results show that the upper part of the original potential landslide is the slip-pressure induced cracking failure mechanism;the lower part is the plastic flow-crack failure mechanism;excavated strong weathering and unloading rock mass is conducive to the slope stability,the effect of the bolting and shotcreting reinforcement scheme is very significant;the slope is safe under seismic protection of the basic intensity Ⅶ,the possibility of large-scale inertial instability is not obvious.
Taking the high rocky slope at left bank of Jinfoshan reservoir in Chongqing City for an example,the original slope stability,the impact of excavation and reinforcement scheme on the slope stability and the potential landslide failure mechanism under action of earthquake are analyzed by using the limit equilibrium method,stereographic projection and engineering geological analysis.The results show that the upper part of the original potential landslide is the slip-pressure induced cracking failure mechanism;the lower part is the plastic flow-crack failure mechanism;excavated strong weathering and unloading rock mass is conducive to the slope stability,the effect of the bolting and shotcreting reinforcement scheme is very significant;the slope is safe under seismic protection of the basic intensity Ⅶ,the possibility of large-scale inertial instability is not obvious.
引文
[1]唐浩.顺层岩质边坡稳定性影响因素分析[D].武汉:武汉理工大学,2009.
[2]夏元友,李梅.边坡稳定性评价方法研究及发展趋势[J].岩石力学与工程学报,2002,21(7):1087-1091.
[3]王俊杰,陈锦璐.阶梯型均质土坡的稳定性分析[J].水电能源科学,2011,29(1);73-75,72.
[4]姚爱军,薛延河.复杂边坡稳定性评价方法与工程实践[M].北京:科学出版社,2008.
[5]谢新宇,刘开富,张继发.边坡及基础工程数值分析新进展[M].北京:科学出版社,2010.
[6]重庆市地震工程研究所.重庆市南川金佛山水利工程建设场地地震安全性评价报告[R].重庆:重庆市地震工程研究所,2011.
[7]中国水利水电科学研究院,电力工业部昆明勘测设计研究院,电力工业部西北勘测设计研究院,等.水工建筑物抗震设计规范(SL203-97)[S].北京:中国水利水电出版社,1997.
[8]李亮,褚雪松,庞峰,等.地震边坡稳定性分析的拟静力方法适用性探讨[J].世界地震工程,2012,28(2):57-63.
[2]夏元友,李梅.边坡稳定性评价方法研究及发展趋势[J].岩石力学与工程学报,2002,21(7):1087-1091.
[3]王俊杰,陈锦璐.阶梯型均质土坡的稳定性分析[J].水电能源科学,2011,29(1);73-75,72.
[4]姚爱军,薛延河.复杂边坡稳定性评价方法与工程实践[M].北京:科学出版社,2008.
[5]谢新宇,刘开富,张继发.边坡及基础工程数值分析新进展[M].北京:科学出版社,2010.
[6]重庆市地震工程研究所.重庆市南川金佛山水利工程建设场地地震安全性评价报告[R].重庆:重庆市地震工程研究所,2011.
[7]中国水利水电科学研究院,电力工业部昆明勘测设计研究院,电力工业部西北勘测设计研究院,等.水工建筑物抗震设计规范(SL203-97)[S].北京:中国水利水电出版社,1997.
[8]李亮,褚雪松,庞峰,等.地震边坡稳定性分析的拟静力方法适用性探讨[J].世界地震工程,2012,28(2):57-63.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心