Research On Stability Of Bedding Rock Slope And Anti-slide Pile Protection

There are a large number of natural bedding high and steep slopes and engineering cut slopes in the central and western mountainous areas of my country.The rock mass has multiple sets of dominant primary structural surfaces.The slope appearance is relatively consistent with the rock formation,and is disturbed by precipitation,tectonic movement and artificial excavation.Later,it is extremely prone to collapse and slip,and it has continuously become a major source of danger for infrastructure construction.As a supporting structure that penetrates the sliding body and penetrates into the sliding bed,the anti-slide pile has an obvious effect on stabilizing the slope.Therefore,studying the stability of the bedding rock slope and optimizing its protection have extremely important practical significance and practicality.value.This paper focuses on the sliding mechanism of bedding slopes,and uses a combination of theoretical analysis,numerical simulation and model tests to analyze the stability of the slope and optimize the protection of anti-slide piles.The work carried out is as follows:(1)Considering the special structural characteristics of the bedding slope,based on the improved transfer coefficient method,the calculation formula for the thrust of the bedding slope landslide is derived,which is applied to the calculation of anti-slide piles in slope protection,which is the spacing of the bedding anti-slide piles And the optimization of row spacing provides the basis.(2)Aiming at the bedding rock slope as the research object,use FLAC3 D to build a numerical analysis model of slope stability,and study the influence law of the slope angle,slope angle,cohesion and internal friction angle on the safety factor.The comparative analysis of parameter sensitivity shows that under certain conditions of cohesion and internal friction angle,the slope angle has a greater influence on the safety factor than the rock inclination;the slope angle and the rock inclination remain unchanged,and the sensitivity of the internal friction angle to the safety factor Greater than cohesion.(3)Construct a numerical model for strengthening the bedding slope with anti-slide piles,analyze the changing laws of maximum displacement,stress,maximum shear deformation,etc.,and study the contribution of different pile positions to the slope reinforcement,based on the rock arching effect between the piles,Explore the optimal matching form of pile diameter and pile spacing,study the influence of double-row pile row spacing on reinforcement,and obtain the corresponding optimal anti-slide pile distribution form by analyzing the combination of multiple pile positions.(4)Carried out the model test of the stability of the bedding slope and the optimization method of anti-slide pile control,and developed a green and environmentally friendly model similar material.The cementing agent is industrial starch and lubricating oil,and the aggregate is iron powder and barite powder.And quartz sand.And through the orthogonal test method,the influence factors of different ratios on the mechanical parameters of the materials are obtained,and the physical parameters of similar materials suitable for the model test are obtained accordingly.Through physical simulations of various working conditions,the theoretical and numerical model results are verified,showing good consistency.This study can provide a basis for the stability analysis of bedding slopes and the design of anti-slide pile protection schemes.