Research on the Key Technology of TBM Tunneling Under the Rock-Filled Highway Roadbed
When TBM tunneling under the rock-filled highway roadbed,if it is not handled properly,it will cause the risk of pavement settlement and roadbed collapse.Based on the background of TBM tunneling under Shenhai Highway in the 2nd working area of Lot 2 of Fuzhou Binhai Express,we have studied the construction technology of TBM tunneling under the rock-filled high-speed roadbed.By adopting the construction technologies of advanced large pipe shed support,steel floral pipe grouting reinforcement,advanced geological detection,core detection and so on,the stability of TBM passing beneath the interval strata has been improved.By optimizing the synchronous grouting equipment,preparing new thick grouting materials and adding the muck improvement system,the uneven ground settlement is reduced and the risk of mud cake is avoided.In addition,by setting reasonable TBM driving parameters and arranging settlement monitoring points,it ensures that the TBM can safely and smoothly pass through the rock-filled roadbed.The research and application of this technology also provides reference for the construction of TBM passing through similar strata in the later stage.
TBMrock fill formationhigh-speed roadbedpipe roof supportsteel floral pipe groutingequipment transformationgrouting material
NETL
NSTL
万方数据
维普
