莫佳琪
【摘 要】随着城市轨道交通运营里程的不断递增,城市地下工程结构渗漏水问题越来越多,渗漏水不仅影响结构耐久性,而且会造成隧道内设备受损,危及行车安全。当前针对车站主体结构、明挖、暗挖及盾构区间整体道床上部的堵漏技术比较成熟,但是针对明挖、暗挖及盾构区间内整体道床下部堵漏,由于涉及整体道床轨道行车安全,不能采用普通方式轻易开展堵漏。
【Abstract】With the increasing operation mileage of urban rail transit, there are more and more leakage problems in urban underground engineering structure. The leakage water not only affects the durability of structure, but also causes damage to equipment in tunnel and endangers traffic safety. At present, the leakage control technology for the main structure of the station, open cut, subsurface excavation and the upper part of the monolithic track bed in the shield interval is relatively mature, but for the open cut, subsurface excavation and the lower part of the monolithic track bed in the shield interval, due to the safety of the monolithic track bed, the leakage control can not be carried out easily in the ordinary way.
【关键词】地铁;盾构隧道;整体道床;下部;渗漏水;整治
【Keywords】subway; shield tunnel; monolithic track bed; lower part; leakage water; treatment
【中图分类号】U45 【文献标志码】A 【文章編号】1673-1069(2021)08-0189-02
1 引言
地铁1号线全部为地下线,整体道床,隧道结构形式有暗挖、明挖和盾构隧道,盾构隧道占比90%左右,盾构隧道漏水涉及盾构管片制造、防水材料质量及施工状况等多方面因素,管片接缝为主要渗漏水隐患处,处于整体道床上部的渗漏水点,容易确定位置并制定专项方案开展堵漏,位于整体道床下部的漏水点不易确定,轻易注浆堵漏将会影响整体道床平顺性,危及行车安全。为此,本文就兰州地铁针对盾构隧道内整体道床下部渗漏水整治的实际做法,总结阐述运营线路针对此类渗漏水的整治及施工组织,以供参考。
2 工程概况
区间风井上行线为YCK10+900.00~YCK12+028.097,长1128.097m。区间隧道左线右线间距约9m。区间隧道最大纵坡坡度27‰,隧道埋深为10.4~40.4m,该处埋深约35m左右,最小平面曲线半径450m。
区间衬砌环均为双面楔形通用环,衬砌环由1块封顶块(F)、2块邻接块(L1、L2)、3块标准块(B1、B2、B3)组成。管片纵向接头为16处,按22.5°等角度布置。管片外径6200mm,内径5500mm,厚度350mm,环宽1.2m;管片纵向连接螺栓数量16根M30螺栓,环向连接螺杆数量12根M30螺栓。……