Study On Stability Analysis And Synthesized Prevention For Slope Based On Tianzhu Mountain

Mount Tianzhu,Anhui,is a AAAAA grade scenic spot as a famous tourist attraction in China.Because its high and steep slopes with Subtropical climate in the northern monsoon,this area has abundant summer rainfall during a long time.During the national day of 2016,5 landslides were triggered by the erosion of rain.In order to restore the ecological environment quality of the scenic area,guarantee the stability of the mountain slope and eliminate the hidden danger of tourists'life safety,it is of great engineering significance and economic benefit to analyze the stability of the slope,reinforce the design and restore the original ecosystem.Based on the research status at home and abroad,the paper introduces the slope stability analysis and calculation method,reinforcement and ecological rehabilitation briefly,and then takes Mount Tianzhu scenic area slope as an example to conduct deep research.According to geological survey reports on the slope of Mount Tianzhu scenic spot,the hydrometeorological conditions,topographic features,stratigraphic lithology,rock and soil characteristics and hydrogeological conditions of the slope are analyzed,On the analysis of slope stability.We know that the slope lithology is mainly composed of strong weathering to weathered quartz sandstone,rock joints and fissures,the slope to the development of structural surface,unfavorable to the stability of the slope,the slope stability is mainly affected by human activities,the formation of high and steep slope after excavation,and slope protection is not timely,the surface rock weathering unloading rock mass under the action of gravity load and slope deformation;at the same time,heavy rainfall,biological factors also have different effects on the slope stability.Using field measured data of joint fissure production combing with structural plane stereographic projection analysis and Lizheng geotechnical software specific analysis conditions of stability of 8 segments were calculated,D-E segment slope stability coefficient above the minimum is 0.835,the slope stability is poor vulnerable to instability;except the slope of the H-I section is in a stable state,the other six slopes are in a state of under stability.Using the FLAC~3DD numerical simulation software and the Mohr model the reasonable calculation parameters were selected,and the D-E slope with the worst stability was analyzed.The distribution characteristics of stress cloud map,displacement cloud chart and vector map of the slope were obtained through simulation,and the form of slope instability was determined,and the stability of the slope was comprehensively evaluated.The anchor on the slope of deep treatment,the strength reduction method principle to calculate the slope safety coefficient has been increased to1.813,more than standard requirements,from the displacement stress and safety factor analysis results of bolting to the reinforcement effect is obvious,to ensure the overall stability of the slope,eliminating the security risks.For the comprehensive treatment of slope,the design of retaining wall,drainage ditch,greening design and sprinkling irrigation system were carried out separately,and the design effect diagram was given.Through the restoration of the surface vegetation,the current situation of soil and water loss in the slope has been improved,and the ecological environment of the scenic area has been promoted.