CAJ | 학술논문

地铁车站轨排井通常情况下采用传统的悬臂围护结构、围护结构+锚索等基坑支护方式，然而膨胀土地区的独特岩土特性导致不能使用锚索，因而需要采用车站主体结构承担全部水、土荷载。文章通过对成都地铁2号线保安村站轨排井设计方案进行优化调整和有限元分析，提出膨胀土地区车站轨排井设计采用主体结构受力方案，轨排井使用和监测结果表明优化调整后的轨排井满足设计要求。
지철차참궤배정통상정황하채용전통적현비위호결구、위호결구+묘색등기갱지호방식，연이팽창토지구적독특암토특성도치불능사용묘색，인이수요채용차참주체결구승담전부수、토하재。문장통과대성도지철2호선보안촌참궤배정설계방안진행우화조정화유한원분석，제출팽창토지구차참궤배정설계채용주체결구수력방안，궤배정사용화감측결과표명우화조정후적궤배정만족설계요구。
Metro station track panel wells usually adopt traditional cantilever retaining structure, the enclosure structure and cable and other foundation pit support. However due to the geotechnical properties of bentonite area, cable cannot be used, and thus it requires the use of station main body structure to bear total load of water and soil. This paper makes optimization adjustment and finite element analysis on the track panel well design at Baoanchun station of Chengdu metro line 2, and puts forward the scheme for track panel well design by using the force of station main body structure in the bentonite area. The use of track panel wells and the monitoring results show that track panel well meets design requirements after optimization and adjustment.