The Whole Process Settlement Law and Control Optimization of Subway Station by PBA Method
Based on a subway station project in Shenyang,a three-dimensional numerical model was established to study the settlement law of the whole construction process of the six-guide hole double-span subway station with PBA method,and corresponding measures were taken to control the surface settlement.The research shows that the surface settlement increases with the construction progress and decreases with the increase of the distance from the center of the station.The settlement curve is symmetrical with the central line of the station as the axis,and the influence range is about 40m on both sides of the central line of the station.During the whole construction stage,the guide hole excavation has the greatest influence on the surface settlement,followed by the arch construction,and the proportion of surface settlement caused by the both is as high as 89.21%.In the construction process,the settlement caused by the construction sequence is the smallest.The shorter the excavation footage of the guide hole,the smaller disturbance to the stratum,and the smaller surface settlement caused in the construction process.
NETL
NSTL
万方数据
维普
