砂卵石地层矿山法隧道长、近距离平行侧穿地铁既有线施工技术  

CONSTRUCTION TECHNOLOGY OF LONG AND CLOSE PARALLEL LATERAL TUNNEL THROUGH THE EXISTING SUBWAY LINE IN SAND AND GRAVEL STRATUM

作　　者：杜树旺 张少华 王鹏 DU Shu-wang;ZHANG Shao-hua;WANG Peng(Beijing Construction Engineering Group Co.,Ltd.,100055,Beijing,China;BCEG Civil Engineering Co.,Ltd.,100015,Beijing,China)

机构地区：[1]北京建工集团有限责任公司,北京100055 [2]北京建工土木工程有限公司,北京100015

出　　处：《建筑技术》2024年第8期911-914,共4页Architecture Technology

摘　　要：新建北京地铁16号线丰台站至丰台南路站矿山法暗挖区间长、近距离平行侧穿既有北京地铁9号线丰台东大街站至丰台南路站暗挖隧道。新暗挖隧道开挖对既有线运营安全影响较大,同时既有线运营期间对新隧道初期支护、二次衬砌施工有较大扰动,为保证既有地铁线路的结构安全、运行稳定以及新隧道初期支护、二次衬砌施工安全,采用“深孔预注浆加固地层+上下导洞(增设临时仰拱)+台阶法”的施工工艺,对施工全过程既有线和新建隧道结构的变形值进行了有效控制,通过分段拆除临时仰拱,及时完成二次衬砌合龙,使得新建地铁线路顺利完成,既有地铁线路的运营也未受影响,本长、近距离侧穿段的顺利施工得到了广泛认可。The new Beijing subway line 16 Fengtai Station~Fengtai South Road Station tunnel excavation section long,close parallel side through the existing Beijing subway line 9 Fengtai Dongdajie Station~Fengtai South Road Station tunnel excavation.New tunnel excavation has a greater impact on the existing line operation safety,at the same time the existing line operation during the new tunnel primary support,two lining construction has a greater disturbance,in order to ensure the structure of the existing subway line safety,stable operation and the new tunnel primary support,two lining construction safety,the project adopted the"deep hole pre-grouting reinforcement layer+upper and lower guide hole(add temporary invert)+step method"construction technology,the construction process of the existing line and the new tunnel structure deformation value was effectively controlled,through the temporary invert demolition section,timely completion of the second lining closed,making the new subway line successfully completed,the existing subway line operation is not affected,the long,close side through the smooth construction,has been widely recognized.

关 键 词：长、近距离侧穿地铁既有线 深孔预注浆加固 增设临时仰拱 

分 类 号：TU74[建筑科学—建筑技术科学]