Research on Construction Technology and Stress of Retaining Structure System with Recoverable Soil Nail Wall

Based on the concept of green environmental protection and carbon neutrality, a recyclable soil nail wall supporting structure system was proposed, and the composition and construction process of the supporting structure system were introduced. The new supporting structure system was applied to practical engineering, and its mechanical performance was discussed. The variation laws of soil nailing axial force and active earth pressure under 1∶0.30, 1∶0.50 and 1∶0.70 supporting slopes were discussed, and the influences of different supporting slopes on soil nailing axial force and active earth pressure were analyzed, which were compared with the theoretical values calculated by modified formula in the code. The test results show that the axial force of soil nailing and active earth pressure increase with the increase of slope in the same depth. For the earth pressure at the same slope, the axial force of soil nailing increases with the increase of depth. According to the change of depth, comparing the actual value with the theoretical value, it can be concluded that the theoretical value and the actual value of active earth pressure have the same trend with the change of depth, and the theoretical value is slightly larger than the actual value. The theoretical value and actual value of axial tensile force of soil nailing show the same trend with the increase of depth. There is a big difference between the calculated axial force and the actual monitored axial force, and the theoretical calculation is relatively conservative.