Study On The Control Measures And The Characteristics Of The Perilous Rock Development In Nanjin Guan-Ma Xiaoxi Provincial Highway No.302 Road

After the "5.12M Wenchuan Earthquake,Langzhong City as the most severely affected area,has more than 1,000 geological disasters such as landslides and collapses occurred.More than 2,300 houses were damaged,and a lot of infrastructure such as water,electricity,roads and communication were damaged.Being an important trunk highway,the upper part of Nanjin Guan-Ma Xiaoxi provincial highway No.302 road had the widespread developed perilous rock mass.Especially after the "5.12" Wenchuan earthquake,perilous rockfall often occurs,which has brought great dangerous to passing vehicles,residents,tourists and so on.This paper mainly studies the engineering geological conditions and the characteristics of the perilous rock development in Nanjin Guan-Ma Xiaoxi provincial highway No.302 road,and the cause of the perilous rock and the destroy mode.Using stereo-analytical method and the static analytic method to analysis and evaluate the perilous rock mass stability,and to forecast development trend and harmfulness of perilous rock.And finally,it studies the treatment measures of dangerous rock.The main contents are as follows:1.The regional geological environment conditions,mainly include the regional natural geological conditions and regional engineering geological environmental conditions,makes specific analysis on the geographical location of the region,meteorology,hydrology,topography,lithology,geological structure,hydrogeological conditions,new tectonic activities and earthquakes and human activities.2.Studies on the basic characteristics of perilous rock development are as follows:the basic profiles,structural features,formation mechanism,deformation and failure modes of the perilous rock in the region are analyzed.3.Stability analysis of the perilous rock:The stability of the perilous rock mass is analyzed and evaluated by the stereo-analytical method and the static analytic method.Calculate and analyze the motion characteristics of 14 perilous rock masses,and evaluate the stability of the slope collapse deposit body characteristics.4.Studies on the control measures of perilous rock engineering:According to the evaluation results of the existing engineering,study the control measures of every kind of the perilous rock mass,and advance the regulation project overall design and component design.