肖家湾危岩体稳定性评价与防治对策
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摘要
为促进危岩体的防治和汶川地震后的重建工作,从地质结构、地形地貌和变形特征分析了肖家湾危岩体的形成机制。在此基础上,采用赤平极射投影和极限平衡法对该区危岩的稳定状况进行了定性与定量分析评价。经分析判断危岩均处于不稳定状态,需进行治理。针对每个危岩体的具体特征,提出了人工清理+砂浆锚杆+砂浆填缝+凹腔支顶+拦石墙+SNS被动防护网等综合治理对策,取得了良好效果。
In order to promote prevention of dangerous rock mass and reconstruction after the Wenchuan Earthquake,the formation mechanism of dangerous rock in Xiao Jiawan is studied in terms of geological structure,topographical landform and deformation characteristics.On this basis,the stability of the dangerous rock mass are qualitatively and quantitatively evaluated by means of stereographic projection and limit equilibrium method.The results of the study show that the dangerous rock mass is instable and needs to be treated.In connection with each specific characteristic of dangerous rock mass,comprehensive control measures which integrate aritificial clearing,mortar bolt,mortar crack filling,concave supporting,volley-unstable rock retaining wall and SNS passive safety net are put forward,and the effect of the measures is good.
In order to promote prevention of dangerous rock mass and reconstruction after the Wenchuan Earthquake,the formation mechanism of dangerous rock in Xiao Jiawan is studied in terms of geological structure,topographical landform and deformation characteristics.On this basis,the stability of the dangerous rock mass are qualitatively and quantitatively evaluated by means of stereographic projection and limit equilibrium method.The results of the study show that the dangerous rock mass is instable and needs to be treated.In connection with each specific characteristic of dangerous rock mass,comprehensive control measures which integrate aritificial clearing,mortar bolt,mortar crack filling,concave supporting,volley-unstable rock retaining wall and SNS passive safety net are put forward,and the effect of the measures is good.
引文
[1]何思明,张晓刚,沈钧,罗渝.乐山大佛景区景云亭危岩灾害分析及其防治研究[J].灾害学,2009,24(3):39-45.
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[5]DZ/T0218-2006滑坡防治工程勘查规范[S].北京.中国标准出版社,2006.
[6]DB50/143-2003地质灾害防治工程勘察规范[S].北京.中国水利水电出版社,2003.
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[8]张业成.中国崩塌、滑坡、泥石流灾害基本特征与防治途径[J].地质灾害与环境保护,1993,4(1):11-18.
[2]黄润秋,刘卫华.滚石在平台上的运动特征分析[J].地球科学进展,2008,23(5):517-523.
[3]王运生,罗永红,吉峰,霍俊杰,吴峻峰,徐鸿彪.汶川大地震山地灾害发育的控制因素分析[J].工程地质学报,2008,16(6):759-763.
[4]GB50330-2002建筑边坡工程技术规范[S].北京.中国建筑工业出版社,2002.
[5]DZ/T0218-2006滑坡防治工程勘查规范[S].北京.中国标准出版社,2006.
[6]DB50/143-2003地质灾害防治工程勘察规范[S].北京.中国水利水电出版社,2003.
[7]崔鹏,韦方强,何思明,等.5.12汶川地震诱发的山地灾害及减灾措施[J].山地学报,2008,26(3):280-282.
[8]张业成.中国崩塌、滑坡、泥石流灾害基本特征与防治途径[J].地质灾害与环境保护,1993,4(1):11-18.
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