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报告描述了一种新的山岭隧道掘进法,此方法在Baikoh隧道工程建设中取得了很好的效果。因为位于市区段隧道,在多数情况下要穿过含地下水的软土地层和靠近各种公用设施和建筑的地段,所以保持隧道和附近既有建筑的结构稳定是非常重要的。为了解决这些问题而采用了两种方法:一种是限制位移的辅助方法,包括脚桩的特殊喷射灌浆和长管棚支护的特殊喷射灌浆;另一种是针对地下水排放采用的钻孔方法,这种方法不会给隧道施工带来负面影响。通过综合采用两种方法,证明了新山岭隧道掘进法对于在覆盖层较浅的市区软土地层中修建隧道是很有用的。对比其他的隧道掘进方法,这种方法的费用是低廉的。对于覆盖层较浅的市区短隧道尤为如此。因此,在今后很多的市区隧道项目中将根据不同的情况采用此方法。
The report describes a new approach to mountain tunneling that has yielded good results in the Baikoh Tunnel project. Since tunnels located in urban areas, in most cases, pass through soft ground layers with groundwater and lots of areas close to various utilities and buildings, it is important to maintain the structural stability of the tunnel and the existing buildings in the vicinity. Two solutions have been used to solve these problems: one is to limit the displacement of auxiliary methods, including the special injection grouting of foot piles and the special jet grouting of long tube shed support; the other is the drilling method for groundwater discharge , This method will not have a negative impact on the tunnel construction. Through the combination of the two methods, it is proved that the New Hill Tunneling Method is very useful for tunnel construction in the soft ground strata in urban areas with shallow cover. Compared to other tunneling methods, the cost of this method is low. This is especially true for the short tunnels in urban areas where the overburden is shallow. Therefore, many urban tunnel projects in the future will adopt this method according to different situations.