上海轨道交通崇明线实现全线隧道贯通|免费人成在线观看网站
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中新网上海10月27日电(杨海燕 谢梦圆)上海轨道交通22号线(崇明线)建设26日再次迎来里程碑式突破，随着陈家镇站至陈东中间风井区间上行线盾构机顺利完成接收，这条国内穿越长江距离最长的轨道交通线路已经实现全线隧道贯通，为22号线最终建成通车奠定了坚实基础。
据悉，此次贯通的上行线隧道全长约2724米，掘进过程中面临地质与环境双重挑战。线路需多次穿越河道、重要管线、建(构)筑物等，且地处崇明岛典型的砂性土层，地下水位高、砂层厚度大，长距离盾构推进对施工的沉降控制与稳定性提出了极高要求。为守护周边环境安全，申通地铁建设集团牵头组织多轮技术论证，对沿线建(构)筑物开展全面排查与评估，并结合试验段实践优化掘进参数，通过严格控制同步注浆量与出土量，并在穿越后及时实施二次注浆，最终将地表沉降控制在毫米级范围内，实现了对周边环境的有效保护。
此外，在盾构接收阶段，面对陈东中间风井接收端头复杂的含水地层，项目团队采用“搅拌桩+旋喷桩+水平冻结”复合加固工艺，成功构建起一道封闭可靠的杯型冻结帷幕，有效隔绝地下水，为盾构机安全精准接收提供了关键技术保障。
此次全线隧道贯通，将为22号线后续轨道铺设、机电安装、车站装修等工序的全面开展创造了有利条件。
截至目前，崇明线工程8座车站已全部完成主体结构封顶，28条隧道全线贯通，轨道铺设工作已分段展开。各项配套工程稳步推进，建成后将进一步完善长三角一体化交通网络，为市民提供更加便捷的出行服务。(完)
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