Abstract：Hujialou metro station of Beijing metro No. 10 is designed to be adjacent to the Jingguang Bridge. Restricted by the bridge piles，the metro station structure is divided into two detached tunnels. In the primary design，the cross diaphragm(CRD) method is adopted. In view of the metro station structure adjacent to the Jingguang Bridge piles(the shortest distance between metro main structure and bridge piles is only 2.16 m) and the risk for metro station construction being great，the adopted metro station construction method should ensure the safety of adjacent bridge piles. According to similar engineering construction experience and finite element numerical analysis，the PBA(pile-beam-arc) construction method is adopted. The adjacent bridge pile risk grade is classified according to the bridge piles spatial location. The corresponding reinforcement measures are adopted according to bridge risk grade. The stratum subsidence and bridge pile displacement are measured during construction period. The monitoring result indicates that the PBA construction method for metro station is reasonable and the reinforcement measures for the adjacent bridge piles are effective.
