汶川县城区某危岩体基本特征及稳定性分析评价
|
摘要
在研究危岩所处的区域环境地质条件和危岩失稳诱发基础上,分析了危岩卸荷带的特征和各危岩单体的结构特征。采用赤平投影法和极限平衡法对该区2个代表性的危岩单体进行定性分析和定量评价。经分析,在暴雨和地震工况下均处于欠稳定或不稳定状态,并根据危岩单体的具体特征,提出了裂缝填埋、削方减载和清表喷锚的治理措施。
Unstable rock instability is one of the frequent geological disasters after the "5.12"earthquake.In this paper,on the basis of the study to the regional geological condition and unstable rock instability of dangerous rock zone,the author analyzes the unloading zone characteristics and the structural characteristics of the monomer dangerous rocks.The stereographic and limit equilibrium methods have been used to qualitatively and quantitatively analyze to two representative monomer dangerous rockmasses.As a result,they both rendered less stable or unstable state in heavy rain and seismic conditions.According to the specific characteristics of dangerous rockmass,it puts forward some control measures such as land filling the cracks,cutting side load shedding and clearing the table spray anchor.
Unstable rock instability is one of the frequent geological disasters after the "5.12"earthquake.In this paper,on the basis of the study to the regional geological condition and unstable rock instability of dangerous rock zone,the author analyzes the unloading zone characteristics and the structural characteristics of the monomer dangerous rocks.The stereographic and limit equilibrium methods have been used to qualitatively and quantitatively analyze to two representative monomer dangerous rockmasses.As a result,they both rendered less stable or unstable state in heavy rain and seismic conditions.According to the specific characteristics of dangerous rockmass,it puts forward some control measures such as land filling the cracks,cutting side load shedding and clearing the table spray anchor.
引文
[1]李世凯,彭社琴,赵其华,等.四川省汶川县城区某斜坡危岩体破坏模式及治理[J].中国地质灾害与防治学报,2009,20(4):1-5.
[2]李明,陈洪凯,叶四桥,等.重庆市洪崖洞危岩发育机理[J].中国地质灾害与防治学报,2008,19(2):1-6.
[3]邓敏,饶新平,雷波.熊猫苑圈舍后山崩塌危岩带稳定性分析[J].安全与环境工程,2011,18(3):13-16.
[4]张倬元.工程地质分析原理[M].北京:地质出版社,1994.
[5]刘景元,宋立军,戴晓敏.1998年3月19日阿图什6.0级地震震害特征[J].内陆地震,1999,13(1):44-49.
[6]殷坤龙.重庆市崩塌滑坡地质灾害规律[J].中国地质灾害与防治学报,1994,5(增):18-23.
[7]谢礼明,李少雄,胡坤生.四方井危岩体的稳定性分析研究[J].人民长江,2007,38(9):112-116.
[8]赵升,郑明新,王全才.汶川地震引起的老虎嘴山体崩塌形成机理与治理方案分析[J].隧道建设,2009,29(2):243-245.
[2]李明,陈洪凯,叶四桥,等.重庆市洪崖洞危岩发育机理[J].中国地质灾害与防治学报,2008,19(2):1-6.
[3]邓敏,饶新平,雷波.熊猫苑圈舍后山崩塌危岩带稳定性分析[J].安全与环境工程,2011,18(3):13-16.
[4]张倬元.工程地质分析原理[M].北京:地质出版社,1994.
[5]刘景元,宋立军,戴晓敏.1998年3月19日阿图什6.0级地震震害特征[J].内陆地震,1999,13(1):44-49.
[6]殷坤龙.重庆市崩塌滑坡地质灾害规律[J].中国地质灾害与防治学报,1994,5(增):18-23.
[7]谢礼明,李少雄,胡坤生.四方井危岩体的稳定性分析研究[J].人民长江,2007,38(9):112-116.
[8]赵升,郑明新,王全才.汶川地震引起的老虎嘴山体崩塌形成机理与治理方案分析[J].隧道建设,2009,29(2):243-245.
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