Experimental Study On Reinforced Soil Retaining Wall Of Qingdao Shugang Railway

The wall panel is a kind of reinforced earth retaining wall part of the wall panel and the corresponding many different structure.The rigid wall-wrapped reinforced earth retaining wall has the characteristics of large deformation limit on the wall surface and high utilization rate of the ribs.Because the railway engineering has strict requirements for horizontal deformation and settlement of the roadbed after work,the rigid wall-wrapped reinforced earth retaining block is selected.Wall research.Taking the reinforced earth retaining wall of Qingdao Shugang Railway as the actual research object,the field test was carried out.Based on the field test,PLAXIS was used for numerical simulation.At the same time,the modular wall model was established under the same working conditions for comparison,and the change law of operation period was predicted.main tasks as follows:(1)By introducing the structure and structural characteristics of reinforced earth retaining wall,and summarizing the theoretical calculation methods of internal and external stability of reinforced earth retaining wall and settlement of composite foundation,the stability calculation of bread-wrapped reinforced earth retaining wall of rigid wall is emphatically analyzed.(2)Based on the field test of reinforced earth retaining wall of Qingdao Shugang Railway,two sections are selected,and test elements are embedded to monitor the vertical/lateral earth pressure and reinforcement strain in the wall,as well as the subsidence of foundation and to predict the potential fracture surface.The data of construction stage and after completion are collected and the variation law is analyzed.(3)Based on the field test of reinforced earth retaining wall of Qingdao Shugang Railway,PLAXIS is used to simulate the model of rigid panel reinforced earth retaining wall.The measured and simulated values of vertical/wall back lateral earth pressure,reinforcement strain,foundation settlement and potential rupture surface are compared by plastic analysis.The other indexes are basically in agreement with the simulated values except potential rupture surface.Under the same working conditions,the modular wall model was established to compare the relevant indicators,and the consolidation analysis was used to predict the two wall model indicators during the operation period.