北京地铁16号线马连洼车站PBA法施工地表沉降控制关键技术

Key Technology of Surface Settlement Control in PBA Construction of Malianwa Station of Beijing Metro Line 16

PBA工法是目前新兴的地铁车站的一种浅埋暗挖工法,浅埋暗挖法施工地表沉降的控制是施工过程的重中之重。论文结合北京地铁16号线马连洼车站工程实践,通过建模数值分析,得出暗挖车站小导洞施工合理顺序,并对各工序关键施工技术予以总结。通过实践及监测结果表明,车站地表沉降控制有效,各技术措施合理,对类似工程有一定借鉴作用。

PBA construction method is a kind of shallow buried excavation method for emerging subway stations,and the control of surface settlement in shallow buried excavation is the most important part in the construction process.Based on the engineering practice of Malianwa station of Beijing Metro Line 16,through modeling and numerical analysis,this paper concludes the reasonable construction sequence of the small guide tunnel in underground excavation station,and summarizes the key construction techniques in each process.The practice and monitoring results show that the ground subsidence control is effective and the technical measures are reasonable,which can be used for reference for similar projects.