Experimental Study On Seismic Performance Of Waste Tire-faced Retaining Wall Reinforced With Geogrid Strip Based On Shaking Table Tests

With the rapid development of my country’s automobile manufacturing industry,the automobile production volume is increasing year by year,and the number of waste tires is also increasing at a rapid rate of 20% per year.How to "turn waste into treasure" effectively treat and use waste tires has become a hot topic in today’s society.For this reason,this thesis proposes a new type of retaining wall with waste tires as wall panels and geogrids as reinforcement materials,and studies its lateral deformation of the wall under different earthquake intensities,dynamic earth pressure of the filler behind the wall,and vertical settlement.The main factors affecting the seismic performance of the new reinforced retaining wall were further compared and analyzed,and the seismic performance of the used tire reinforced retaining wall was finally evaluated comprehensively.The specific research content is as follows:(1)Combining the actual size of the used tire-reinforced retaining wall and the size of the shaking table,the geometric size of the scaled retaining wall model is determined according to the similarity ratio design criterion.To test the dynamic response of the retaining wall under different earthquake intensities,different types of accelerometers,laser displacement meters and earth pressure gauges are selected,and their parameters are re-checked.At the same time,the model tires,geogrids,geotechnical straps,etc.are tested.The tensile strength of the test material and the density and gradation curve of the fine sand filler.(2)A shaking table model test was carried out for the vertical retaining wall with waste tires to study the wall acceleration,lateral deformation and residual deformation under different earthquake intensities,the acceleration of the filling behind the wall,the vertical settlement and the dynamic earth pressure response law,and the comparison with the traditional cantilever The dynamic response characteristics of the retaining wall were compared,and the overall seismic performance and feasibility of the retaining wall with waste tires as the wall panel were comprehensively evaluated.(3)A shaking table model test was carried out for the vertical reinforced retaining wall with waste tires to study its dynamic response under different strengths of far-field Songpan wave and near-field Shifang wave,and compared with the traditional reinforced concrete retaining wall,comprehensive analysis The overall seismic performance,advantages and disadvantages of the reinforced retaining wall combined with waste tires and geogrids,and the significant role played by geogrids are also discussed.(4)A shaking table model test was carried out for the inclined scrap tire reinforced retaining wall to study its overall seismic performance under different earthquake intensities.At the same time,it was compared with the cantilever retaining wall and the traditional reinforced concrete retaining wall,combined with the erection There is no reinforced and reinforced retaining wall with waste tires,and the influence of the slope of the wall and the geogrid on the seismic performance of the retaining wall is comprehensively analyzed.(5)Based on the results of the previous research,and further considering the slope of the wall,the length of the reinforcement and the spacing of the reinforcement,the shaking table comparison test of the retaining wall reveals the main factors affecting the seismic performance of the retaining wall.Finally,the seismic performance of the three types of waste tire reinforced retaining walls is compared to evaluate the best performance of the waste tire retaining wall form,which provides a reference for the promotion of future engineering applications.