Technical Research On Supporting Slope With System Bolt And Grid Beam System

As an economical and efficient method of slope reinforcement,the system bolt and lattice beam system supporting slope technology has a wide range of applications in landslide treatment.For a long time,researchers have focused on the engineering application of system bolts and lattice beam systems to support slopes,but there is not much research on the theoretical part of system bolts and lattice beam systems to support slopes,such as: When the system bolt and the lattice beam system support the slope,the optimal range of the bolt inclination angle and the optimum range of the spacing,have restricted the vigorous promotion of the system bolt and lattice beam system to support the slope.By consulting the literature,this article summarizes the used methods of slope stability evaluation and the analysis methods of system anchors and lattice beam systems.At the same time,based on the engineering background of the northeastern side slope of the Lianfa Mine in Haodong Village,Shangyu District,Shaoxing City,Zhejiang Province,through finite element software simulation and the rigid body limit equilibrium method for analysis,the slope is studied using system bolts and slope stability after the slope reinforcement treatment plan of the lattice beam system.In addition,the method of numerical simulation was used to study the influence of the inclination and spacing of the system bolts on the slope consolidation of the system bolts and lattice beams.The main research conclusions are as follows:(1)By studying the engineering example of the slope landslide on the northeast side of Lianfa Mine,Haodong Village,Cao'e Street,Shangyu District,Shaoxing City,Zhejiang Province,using rigid body limit equilibrium method and finite element simulation method to analyze it,it is concluded that: The slope adopts a system of anchor rods and lattice beam system to reinforce the slope.The designed anchor rod horizontal spacing is 3m,the vertical spacing is 3m,and the designed anchor rod inclination angle is 20°.Through finite element analysis,it can be known that the slope has reached a stable state after treatment.The plan is practical and can achieve the effect of slope treatment.(2)According to engineering examples,by studying the influence of the inclination angle of the system bolt on the system slope,it is found that: With different anchor rod spacing,the slope stability coefficient shows a trend of first increasing and then decreasing with the increase of the anchor rod inclination angle.Therefore,there is an optimal anchorage angle range for the system slope,which is20°to 35°.(3)Combined with the engineering examples,through studying the influence of the system bolt spacing on the system slope consolidation,it is found that: Under different anchor rod inclination angles,the slope stability coefficient shows a gradually decreasing trend with the increase of the anchor rod spacing.Among them,when the bolt spacing is 2m to 3m,the increase in the bolt spacing has little effect on the slope stability,showing a gentle trend.When the distance between bolts exceeds3 m,the slope stability coefficient decreases significantly,so there is an optimal bolt distance range from 2m to 3m.(4)Considering that the smaller the bolt spacing,the more the number of bolts used,the more the project budget will increase,and the greater the angle,the more difficult the bolt construction will be.Therefore,considering the economics of the project and the difficulty of construction,when the system bolts and lattice beam system are used in the project,the design inclination angle of the bolts is 20° and the design spacing of the bolts is 3m.