Research On Landslide Unstability Treatment Technology Of Meng-Wenshan-Yanshan Highway K54+900?K55+170

Due to heavy rains,Yunnan province to Wens han to Mengzi highway Yanshan local high embankment subgrade surface longitudinal cracks,and in evening collapse.In this paper,the Mongolian Yan high embankment landslide section based on the project,compares the reason analysis and disposal scheme of landslide Landslide Stability Evaluation of slope after reinforcement of the combination of qualitative and quantitative.The main research contents and conclusions are as follows:1,The geological and hydrological project conducted a survey and analysis of the cause of landslide,the landslide treatment scheme than the election,the final choice of tunnel debris pressure + subgrade pile wall retaining scheme,treatment measures are put forward for reinforcement engineering.2,Through typical examples,comparing the calculation results of the strength reduction with Sweden Arc method,simplified Bishop method,found that the strength reduction method and simplified Bishop method to calculate the accuracy is close to,put forward the strength reduction method can be used for stability evaluation of simplified Bishop method based on standard.Based on FISH language,the strength reduction analysis of large scale geotechnical software FLAC3D platform is carried out.It is of great theoretical value to popularize the application of strength reduction method in the slope.3,Relying on high embankment landslide Mongolian Yan expressway,the typical cross section of YK55+130 and B-B were typical longitudinal stability analysis.The results showed that the rainfall infiltration is a key factor inducing primary slope stability,slope top subgrade and clay layer shear,tensile plastic deformation and instability;the hole slag anti pressure and anti sliding piles,can remain stable under conditions,greatly influence the steady state effect of tunnel waterproof the slag layer on the cross section of the hole,when the slag can effectively waterproof slope stability,and instability.Because of the gentle slope,the anti slide piles provide enough anti sliding force and block the coalescence of the shear plastic zone,and the longitudinal section always keeps the slope stable without the influence of rainwater infiltration.4,Starting from the safety of construction,a new evaluation index system of slope stability based on construction safety is put forward,which can provide guidance for the safety production of construction enterprises.The evaluation method can effectively cut slope construction system and each subsystem can combine the correlation overall correlation between the system and subsystem of the comprehensive characterization of cutting construction system,and stress symptom identification system and stress factor.