摘要
研究目的:大伙房输水工程特长隧洞主洞长85.32 km,开挖洞径8.03 m,属于深埋特长隧洞。由于隧洞施工采用以TBM为主、钻爆法为辅的联合施工方式。隧洞穿越区域水文地质条件复杂,通过对TBM合理选型和支护系统优化,来解决隧洞开挖过程中面临的围岩稳定性、隧洞涌水、石英砂岩的掘进效率及岩爆等三大关键技术难题。研究结论:通过对大量文献资料和工程实例的研究,对大伙房特长隧洞所穿越区域的主要工程地质问题进行分析,并结合国内外已有的TBM施工经验,特长隧洞决定选用敞开式TBM,锚喷支护+模筑混凝土复合衬砌结构支护系统代替管片衬砌结构。对大伙房输水工程特长隧洞的建成发挥了重要的保证作用,也为今后类似工程提供参考和借鉴。
Research purposes： The Dahuofang water tunnel is a super long deep-buried tunnel with the length of main tunnel of 85.32 km and excavation diameter of 8.03 m.TBM was used as main construction method along with bored blasting method for construction of the tunnel.As the tunnel passed through the area with complicated hydrogeologic conditions,it was necessary to do the works of TBM type-selection and optimization of the support system so as to solve the technical problems related to the stability of surrounding rock,water inrush of the tunnel,tunneling efficiency in quartz sandstone area and rock outburst while tunneling.Research conclusions：Based on studying a large number of data and TBM construction cases,the main engineering geological problems in the area where the tunnel passed through were analyzed.Based on the analysis of TBM construction experiences at home and abroad,it was decided to adopt the open-type TBM for construction of the tunnel and to adopt the composite lining structure made up of bolt-shotcrete support ＋ cast concrete lining as support system of tunnel instead of segment lining.It played an important role in construction of tunnel and could be as the reference to the similar projects in the future.
出处
《铁道工程学报》
EI
北大核心
2010年第3期61-65,86,共6页
Journal of Railway Engineering Society
