客运专线隧道下穿既有铁路管幕施工技术

Discussion on the construction craft of tunnel in passenger dedicated highway line underpasses through established railway pipe roof

针对控制长管幕施工精度及控制地表沉降在管棚法施工中的重要性,结合北京—石家庄客运专线下穿石太直通线长管幕施工工程实例,对该问题进行了深入分析探讨,其中精度控制主要依靠较先进的导向仪器,沉降控制则主要通过开挖速率、对管内管外进行注浆以及现场同步施工监测等综合措施来实现。

Considering of the importance of the construction of controlling of surface subsidence and controlling of the accuracy of long-tube screen construction,it analysis in depth on this issue taking the case of the long-tube screen construction of the project that passenger dedicated highway line from Beijing to Shijiazhuang underpasses Shi-Tai direct line,during which accuracy control mainly depends on the more advanced guidance equipment,sedimentation control on comprehensive measures of excavation rate,pipe grouting in and outside pipe and simultaneousmonitoring of on-site construction.