公铁合建超深车站施工方法比选  

Comparison and Selection of Construction Methods of the Combined Highway and Subway for Ultra Deep Station

作　　者：欧阳冬[1] OUYANG Dong(China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063)

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《都市快轨交通》2021年第1期87-94,共8页Urban Rapid Rail Transit

基　　金：国家重点研发计划(2018YFC0808702);国家重点研发计划(2019YFC0605100)。

摘　　要：针对武汉地铁7号线徐家棚站基坑工程,对明挖顺作和盖挖逆作施工方法进行比选研究。通过数值计算、设计分析和工程实践经验总结,得到如下结论:一是开创"先逆后顺再拓"新型逆作工法,相对于同等厚度(1 500 mm)围护地连墙明挖法施工,节省投资占土建总投资的7.3%;相对于1 200 mm厚地连墙明挖法施工,节省投资占土建总投资的5.3%;二是采用新型逆作法,安全可靠,投资较省,工期较优,绿色环保,是一种可持续发展和绿色建造的施工方法;三是开创钢管混凝土柱"两点机械定位工法",施工便利,精度可控,最高精度可达1/500H以上,满足设计和工程受力要求。To reasonably determine the construction method of the Xujiapeng Station of the Wuhan Metro Line 7, through numerical calculation, design analysis, and engineering practice experience summary, open-cut and cover cut top-down construction methods of this project are compared and selected. The conclusions are as follows:(1) a new reverse construction method of "first reverse, then smooth, and finally extension" is created. Compared with the open-cut construction method of the enclosure diaphragm wall with the same thickness(1,500 mm), the investment saving accounts for 7.3% of the total civil engineering investment;compared with the open-cut method of a 1,200 mm thick diaphragm wall, the saved investment accounts for 5.3% of the total civil engineering investment.(2) The new top-down method is safe and reliable, with less investment, a better construction period, and environmental protection;this is a construction method of sustainable development and green construction.(3) The "two-point mechanical positioning method" of concrete-filled steel tubular columns is created, which is convenient and precise. The maximum accuracy can reach over 1/500 h, which can meet the requirements of design and engineering.

关 键 词：地铁 公铁合建车站 明挖顺作 盖挖逆作 钢管混凝土柱定位 绿色建造 

分 类 号：U121[交通运输工程]