单拱大跨隧道信息化施工监控量测技术研究

针对地下工程的开挖和支护安全超前预报以及对地质灾害开展预测的问题,以京珠国道高速公路旦架哨单拱大跨隧道信息化施工为例开展研究工作。现场监控量测主要针对锚杆轴力、围岩应力及型钢内力等,同时结合地面地质调查和隧道洞内地质观测等,通过数据的采集、处理和反馈,建立了隧道信息化施工地质灾害预报流程与模型,并成功地对重大地质灾害进行了预报,使隧道工程的设计和施工运作纳入科学的动态管理中,确保了隧道施工的安全。

Research on field monitor measuring techniques in informational construction of single arch long-span tunnel

Based on the problems of tunnel excavating and lining support pre-forecast and geological pre-forecast,authors studied the construction of Danjiashao Tunnel of the national freeway from Beijing to Zhuhai as an example.The content of field monitor measuring mainly included the axial force of the anchor bolt,the stress of the surrounding rock and the bending moment of the steel arch and so on.At the same time,having considered the terrain geological survey and geological observation of inner tunnel and so on.By data collection,handle and feedback,the forecast system of geological hazards in the informational construction of the long-span tunnel has been set up.By this system,the great geological hazards have been predicted and forecasted successfully.The design and construction of the tunnel are always in the scientific dynamic management.It has guaranteed the safety of the tunnel construction.