狭小空间地铁车站深基坑半盖挖法施工关键技术OA

To address the site constraints and environmental risks in the construction of deep foundation pits for metro sta-tions in narrow spaces,taking a station of Tianjin Rail Transit Line B1 as the engineering example,this re-search clarifies an efficient operation process suitable for narrow spaces by sorting out the logic of key proce-dures in the whole process of semi-top-down construction and optimizing the earth excavation sequence and mechanical configuration scheme.Meanwhile,targeted technical guarantee measures such as foundation pit deformation control and dewatering management are proposed.Engineering practice verification shows that this method has effectively solved the construction organization problems in narrow sites and achieved the safe-ty and stability of the foundation pit as well as the improvement of comprehensive benefits.