Application Of Dispersion Pressure Cables To High Slope Reinforcement

Prestressed anchor cable is widely used in protective reinforcement,involving water conservancy,transportation,construction,energy and other infrastructure construction.With the advance of high-speed railway and expressway construction in western mountain area,the excavation of slopes produces a large number of high slopes.Geotechnical engineering for prestressed anchor cable in large deformation stratum,can still plays the role of anchor research is still relatively small,therefore,it is needed to study a new type of prestressed anchor cable which can adapt to the large deformation.In this paper,a new type of pressure dispersed anchor cable structure is proposed to allow large deformation of rock and soil mass,and to ensure that the cable structure is not damaged.Firstly,the structure type of prestressed anchor cable is summarized,and the structure characteristics of tension type,pressure type,load concentration type and load dispersion type anchor cable are analyzed,and the advantages and disadvantages of different cable structures are summarized,and the reinforcement mechanism and load transfer mechanism of prestressed anchor cable are analyzed.Secondly,we did our research based on the project of Wumupo high slope,we pointed out the reasons of using new type of pressure dispersed anchor cable,put forward the improved pressure dispersion type anchor cable in high slope design,and made specific arrangements.We also did anchor static load test after improvement and put forward the construction technology of new pressure dispersed anchor cable.As for Wumupo high slope,we took numerical simulation to analyze the high slope excavation deformation and stress characteristics,considering the fracture and two groups of joints,we set a numerical analysis model of typical section,and we used the strength reduction method to get the safety factor of slope stability,analyzed the failure mode of limit state slope.Finally,by monitoring the pressure dispersion type anchor cable force,the deep slope displacement and the surface deformation of the slope,the development law of the slope deformation is basically mastered,and the dynamic design and information construction are realized,and it can provide the basis for evaluating the effect of slope treatment and the safety and stability of the construction period and operation period.