Research On Grouting Improvement Of Miscellaneous Fill Slope And Anchor Lattice Beam Support

People’s living standards are improving day by day,resulting in the accumulation of a large number of construction and domestic garbage,forming complex fills.These complex fills often form miscellaneous fill slopes on the ground,which are easy to collapse and cause certain safety hazards.Therefore,how to better deal with these miscellaneous fill slopes is very necessary.This paper selects cohesive soil,sand,stones and wood chips(blocks)to configure the miscellaneous fill according to a certain mass ratio,and conducts a series of experimental studies to determine the effect of grouting on the slope of the miscellaneous fill and the effect of the anchor lattice beam on the slope.The reinforcement effect is analyzed and studied;the influence of different anchoring angles,different anchoring lengths and different anchoring row spacings on the slope support is analyzed through numerical simulation software.The main conclusions are as follows:(1)In the analysis and research of the grouting improvement of the miscellaneous fill under different compaction degrees,it is found that under the premise of ensuring a certain degree of compaction,with the increase of the grouting content,the cohesive force and the internal friction angle are equal.Corresponding increase,but their growth rates are different;under the condition of ensuring a certain amount of grouting,the cohesive force and internal friction angle of the miscellaneous fill increase with the increase of the degree of compaction,but the increase speed is different.(2)Based on the slope model,the graded loading test is carried out,and the mixed-filled soil slope is reinforced by the method of bolt lattice beam combined with grouting improvement,and compared with the unreinforced mixed-fill slope model,it is explored that the reinforcement method is opposite to the side slope.The slope reinforcement effect is remarkable.Using FLAC3 D software to verify the model test,it is found that the simulated value is not much different from the experimental value,which verifies the reliability of the numerical simulation.(3)A full-scale model was established by FLAC3 D software to analyze the influence of different anchoring angles,different anchoring lengths and different anchoring row distances on grouting mixed-fill slope support.Through comparison,it is found that when supporting slopes,there are optimal anchoring angles,optimal anchoring lengths,and optimal anchoring row distances according to specific projects.Therefore,in the actual project,calculation and analysis should be carried out according to the actual situation,and a more economical and reasonable method should be adopted for slope support.