城市地铁盾构法及矿山法相结合施工技术.doc

Abstract City subway usually shallow buried tunnel, and the route to the bustling city lots, overlying buildings, dense, heavy traffic, so it is usually constructed by shield method to reduce the effect of ground.However in the process of excavation in hard rock, Boulder or long distance of soft hard lot, still using shield method construction will accelerate the tool wear, reducing driving speed, frequent replacement of tools will enable the artificial cost and engineering cost rises ceaselessly, and the construction safety risk, the project impact.Therefore in such areas may be considered mining method with shield method combining construction. Keywords:Shield; mining method; construction technology of combining. 摘要 城市地铁通常为浅埋隧道，且穿越路线为城市繁华地段，上覆建筑物多、人口密集、交通繁忙，所以通常采用盾构法施工以减少对地面影响。然而在开挖过程中若遇到硬岩、孤石群或长距离上软下硬地段时，仍采用盾构法施工将会加速刀具磨损、降低掘进速度，频繁更换刀具将使人工成本及工程成本不断上升，且施工安全风险极大，对工程整体进度产生影响。故在此类地段可以考虑矿山法与盾构法相结合进行施工。 关键词：盾构法； 矿山法； 结合施工技。 1 .Introduction Along with our country city track transportation tunnel engineering construction development, the engineering geological condition becomes more and more complex, simple shield method construction technology and construction technology of simple mining method on the adaptation of formation increasing limitations.When the tunnel segments with uneven hardness and the difference is larger, if only using shield method construction, selection can also meet the cutting strength is low and soft soil excavation of high strength rock composite shield machine shield machine, not only the high cost, in hard rock excavation cost is high.And when the stratum uneven hardness difference in hard rock strength is high, the shield machine is very difficult to satisfy the requirements of both, will cause a series of problems and accidents. On the other hand, the soft rock of mine construction, high cost of construction, long construction period, and the construction risk is difficult to control.Especially in city subway tunnel, the bu