关键词: 隧道工程, 深埋地铁车站, 施工通道, 门型转换法, 施工力学

Abstract: Based on Hongtudi Station in line 10 of Chongqing rail transit, the method combing finite element numerical simulation with monitoring measurement was adopted. The influence of door-type-conversion climbing construction method on the construction passage and the stability of surrounding rock and supporting structure at intersection of subway station was analyzed. The results show that the construction of door-type-conversion method has great influence on the displacement and stress of the surrounding rock of the transition section. The vertical displacement of the surrounding rock at intersection is 8.3 mm~10.7 mm; the maximum principal stress of surrounding rock is 7.92 MPa (pressure stress)and the minimum principal stress is 0.64 MPa (tensile stress); the maximum principal stress of the supporting structure is 21.40 MPa (compressive stress)and the minimum principal stress is 6.30 MPa (tensile stress). The minimum principal stress exceeds the tensile strength of concrete, which should be paid enough attention in the construction process.

Key words: tunnel engineering, deeply-buried metro station, construction passage, door-type-conversion method, construction mechanics