Abstract:In the Shanghai Outer Ring West Section Traffic Function Upgrading Project, the existing bridge is proposed to retain as the main line at the node of Dianpu River, and the auxiliary elevated bridges will be built on both sides of the bridge. The newly built base slabs of the bridge is close to the current Dianpu River, and the engineering section of Dianpu River is directly connected to Huangpu River where the water level fluctuates significantly. To analyze the impact of the construction of the new base slab excavation on the revetment of Dianpu River, firstly, based on the design scheme, two most unfavorable calculation sections are selected, and the plasix software is used to establish a finite element model of HSS small strain reinforced soil. Secondly, based on the position relationship between the newly built base slab and the existing revetment, as well as the excavation scheme, the different combinations of calculated water levels and loads are selected, and the established model is used to analyze and compare the displacement of the revetment caused by excavation construction under various calculation conditions. The calculation results indicate that the displacement of the revetment is generally controllable, but monitoring needs to be strengthened during the construction period. Based on this, the load control requirements and the excavation construction schemes are proposed to reduce the impact of construction.
