Experimental Study On Slope Model Of Micro-pile-vegetation Collaborative Slope Protection

In the actual project,the micro pile has flexible construction,the scope of application support is wider,but in the actual use,more and more emphasis is placed on the use of ecological slope protection,the combination of vegetation slope protection and micro pile slope protection can effectively improve the slope protection effect,this thesis mainly analyzes the slope anti-slip performance of micro column-vegetation,and the interaction effect of the two,which provides a certain theoretical basis and design reference for the disaster prevention and mitigation of collaborative slope protection,and provides some references for practical engineering.This study takes actual engineering as background and carries out model tests according to similar theory.Four different conditions are set up,namely bare slope,mini-pile slope protection,vegetation slope protection and micro-pile-vegetation slope protection.Explore the distribution law of soil pressure under load and the slope protection mechanism of vegetation.The research results of slope horizontal displacement under four working conditions are as follows:(1)The final displacement of the four groups of working conditions and the maximum displacement growth rate from large to small are bare slope group > vegetation slope protection group > micro pile slope protection group >micro pile-vegetation cooperative slope protection group,cooperative slope protection can make the slope landslide produce more obvious omen;(2)The difference between the three adjacent displacement meters on the slope surface of the four groups of working conditions is reduced compared with the bare slope,and the reduction range is vegetation slope protection group<micro pile slope protection group<micro pile-vegetation synergistic slope protection group,in which the micro pile-vegetation synergistic slope protection group is reduced by 87.5% and 88.3% respectively.The synergistic slope protection effectively reduces the harm of sliding body splitting and greatly reduces the damage to personnel and property caused by landslides.The following conclusions can be drawn by analyzing the soil pressure before and after the micropile and the micropile-vegetation synergistic slope protection:(1)The landslide thrust of the synergistic slope protection is reduced compared with that of the micropile slope protection,and the landslide thrust is reduced by 56.6% at the depth of 20 cm;The resistance of the sliding bed behind the pile is not significantly improved.(2)The vegetation bears part of the earth pressure through the anchoring effect of the root system,and the reinforcement effect of the root system improves the ability of the soil to bear the earth pressure,which redistributes the resistance of the sliding bed in front of the pile,and reduces the resistance of the sliding body in front of the pile by 57.8%;...