Study On Deformation Monitoring And Stability Analysis Of A High Slope In Guangzhou

With the rapid development of economy and society,the contradiction between the lack of land resources and the requirements of urban development has become increasingly prominent.In order to make full use of land resources and meet the needs of construction and development in urban development,it is often necessary to build buildings on the slope.If the slope protection is not done well,the slope will produce obvious deformation or even instability damage,which will cause a huge threat to the surrounding buildings and infrastructure,and huge losses to the national property and people's life safety.During the construction of a high slope in Guangzhou,part of the slope deformation is larger than the control value,endangering the safety of nearby buildings and infrastructure,so it is necessary to reinforce and protect the slope.This paper focuses on the study of the slope to do the following research.(1)According to the field geological survey,drilling and data collection,the engineering geological conditions of the study area are described in detail.Based on the engineering geological conditions,this paper designs a deformation monitoring scheme of the slope,arranges the displacement monitoring points to monitor the slope and the surrounding buildings.Through the calculation of the monitoring data,the horizontal displacement rate of the slope is 0.80mm/d,the settlement rate is-0.34mm/d,and the slope has experienced a change process from weak deformation to strong deformation.The main reasons for this phenomenon are the sudden increase of precipitation and the impact of human engineering activities on the slope.(2)This paper makes numerical simulation of the most deformed slope in the study area under natural and rainstorm conditions by FLAC 3D,and qualitatively analyzes the stability of the slope.The results show that the slope stability coefficient decreases from 1.3 to 1.059,the displacement increases from 1.7cm to 17.72 cm,and the maximum shear strain increment increases from 1.03% to 11.56%.The slope is in the critical state of deformation and failure,and it is likely to slide along the potential sliding surface under the influence of other adverse factors.(3)Combined with the results of monitoring and numerical simulation,this paper designs anchor rod + lattice beam,prestressed anchor cable + lattice beam and vegetation protection schemes for different parts of the slope,which are verified by numerical simulation.The results show that the stability of the slope is greatly improved after reinforcement,which meets the safety standard of slope construction.It shows that the overall protection measures are effective and feasible,and provide reference for similar slope treatment research.