Study On The Subway Station Structure Traits And The Overall Stability Under Elevated Bridge Load

The cases of the current subway station as the elevated bridge box foundation are rare.The researches on Integrated Station-Bridge Structure System are mostly in seismic aspect at present,but the study on Integrated Station-Bridge Structure System in the stress and stability less.For this situation,based on combined protect of Xiamen city metro T interchange station(Lucuo station)at the intersection of line 1 and line 2,and ground municipal elevated bridge,through its finite element analysis model,the stress and stability of subway station structure under the load of elevated bridge were studied in this article.Its main contents as follows:1.According to the site construction conditions and relevant parameters,using Midas software to establish two-dimensional model,the most unfavorable point of the roof and side wall location were determined in the station of metro station.Combined with the current code,theoretical analysis of the stability of the roof and side wall were studied using the results which were get by the most unfavorable point location in the station to station.2.According to practical engineering data,two-dimensional plane strain model of the Integrated Station-Bridge Structure System was established using the finite element software ABAQUS,considering the station structure with setting and without pile at the bottom two kinds working conditions,calculated the subway station structure properties,soil settlement,pile side friction distribution,etc.and the contrast analysis of internal force,displacement were also carried under the two station model.3.Based on ABAQUS finite element software,three-dimensional space structural system of the Integrated Station-Bridge Structure System model was established.The soil displacement,internal force of each plate,and the station at the bottom of the pile foundation displacement is analyzed under the elevated bridge load of subway station,and these result were compared with the station without pile at the bottom.4.For two-dimensional and three-dimensional model,through output maximum principal stress in the post-processing,tensile damage area was got underground structure,which has important guiding significance in practical for reinforcement design in underground structure engineering.