Study On Slope Stability And Supporting Measures Of A Power Plant In Luodai Town

Luodai Town,Longquanyi District,Chengdu is the largest landfill site for waste disposal around Chengdu.Construction activities are extremely frequent.There are large-scale slope projects in most construction projects,especially a large number of high fill slopes.The stability of these slopes directly affects the safety and reliability of the project and the progress of subsequent projects.This paper takes the high fill and cut slope of an environmental protection power plant in shizicun as the main research object.On the basis of expounding the regional geological environment conditions,according to the engineering characteristics and engineering geological conditions,this paper puts forward and must select the site plan.Based on the optimal site plan,the slope stability is analyzed and evaluated from multiple angles.Finally,according to the slope characteristics and stability evaluation results,the engineering slope support measures are proposed and designed,and the rationality of the support measures is analyzed and verified by using numerical simulation and existing deformation monitoring data.The research results in this paper can provide reference for the engineering practice in this area(1)According to the characteristics of the project and the geological conditions of the site,the terrace scheme with different steps is selected.The elevation of the main workshop is 619 m,the elevation of the logistics entrance and exit is 618 m,and the elevation of the leachate workshop is 625.5M.Under the scheme,a filling slope with a maximum height of 26 m will be formed on the east side of the site,and a excavation slope with a maximum height of 52 m will be formed in the southwest of the site.(2)The rock mass after excavation in the study area has high bearing capacity and is a good filling material,which can be directly used by laying geogrid after crushing.This paper puts forward specific requirements for the requirements of backfill and quality parameters.Through numerical simulation and deformation observation,the parameters are verified to be reasonable and feasible.(3)According to the engineering geological conditions of the project site,P1 and P2 filling slopes and P3 excavation slopes with the most unfavorable geological conditions are selected for qualitative and quantitative stability analysis.It is concluded that the three slopes are in stable state under natural conditions.After filling,the artificial filling part of P1 and P2 slopes will produce large deformation,and the slopes will slide down and destroy as a whole;after excavation,P3 slope will not produce overall instability,but there is the possibility of small-scale collapse and block falling.(4)Based on the results of stability evaluation,three preliminary design schemes of typical slope support are proposed: pile foundation supporting beam gravity retaining wall is set for P1 filling slope,pile sheet wall is set for P2 filling slope,and anchor lattice support is used for P3 excavation slope.Through numerical simulation and field deformation monitoring data analysis,the rationality of the support scheme is demonstrated.That is to say,under the complex geological conditions in Shizi village,Luodai Town,Longquanyi District,Chengdu City,it is effective and feasible to support high fill slope with pile foundation supporting beam gravity retaining wall and pile sheet wall,which can provide reference for similar engineering construction in this area.