盾构空推过矿山法隧道施工方案设计

DESIGN OF CONSTRUCTION SCHEME FOR SHIELD TUNNEL PUSHING THROUGH MINE TUNNEL

文中为了解决地质岩层岩石硬度大,单轴抗压强度高,施工风险大,单纯盾构法施工工艺很难通过的施工问题,在施工中采用了盾构+矿山的组合配套技术方法,即盾构机进入矿山法隧道后空推,后方拼接管片,在管片后方吹砾石且结合注浆的工艺流程。通过工程实例的实践证明,经过有效的精度控制和精密测量且合理的安排施工顺序控制,盾构+矿山法技术施工可以很好的解决岩层强度高,盾构无法通过的施工难度问题,该工法实施效果良好,能够使盾构机在地质条件复杂的硬质岩地层中能得到进一步发展。

In order to solve the problem of high hardness of rock in geological rock formation, strength of uniaxial compressive and risk of construction, as well as the construction method of single shield construction method is difficult to pass. In the construction, the combined technical method of shield and mine is adopted. That is after the machine enters the mine tunnel, the air is pushed, the rear piece is spliced, the gravel is blown behind the tube piece and the grouting process is combined. Through the practice of engineering examples, it is proved that through effective precision control and measurement as well as reasonable arrangement of construction sequence control, the construction difficulty problem of high rock formation strength and failure of the shield can be solved effiently by shield and mining technology. The implementation is effective and can make the shield machine to be further developed in hard rock formations with complex geological conditions.