盾构连续移动式冲击凿岩技术试验研究  

Test and Research on Continuous Mobile Percussive Drilling Technology of Shield

作　　者：肖伟 Xiao Wei

机构地区：[1]中国铁建重工集团股份有限公司,102206

出　　处：《工程机械》2022年第5期25-32,I0014,共9页Construction Machinery and Equipment

摘　　要：TBM设备在硬岩掘进时,存在工作效率低下、滚刀磨损严重以及工作机构耗损严重等缺陷。严重降低了掘进效率,影响整机的性能。为了更加适应地层的开挖,通过对原有开挖刀盘进行分析,研究一种连续移动式冲击凿岩开挖技术。通过仿真分析法,对不同钻头落点位置模拟仿真,并通过试验法搭建试验平台,对气动潜孔锤和液压凿岩机分别进行试验,以验证凿岩能力。试验表明,连续移动冲击凿岩设备中,液压凿岩机比气动潜孔锤效果更明显,且方案具备可行性。利用TBM刀盘结合冲击破岩装置,可以使岩石单向受压,使岩石更容易破碎,先利用冲击形成预裂或临空面,再利用滚刀压裂,可有效提高掘进效率,并且减少了盾构施工过程中刀盘上的刀具磨损情况,增强了TBM设备在面对硬岩掘进的过程中对硬质地层的切削能力,可以有效地提高掘进设备对地层的适应性。During hard rock excavation,TBM has some defects,such as low working efficiency,severe wear of hob and severe wear of working mechanism,which seriously reduces the excavating efficiency and affects the performance of the whole machine.In order to be more suitable for the excavation of the stratum,a continuous mobile percussive drilling technology is studied by analyzing the original excavation cutterhead.Through the simulation analysis method,the different bit drop points are simulated,and the test platform is built through the test method to test the pneumatic down-the-hole hammer and the hydraulic rock drill respectively to verify the rock drilling ability.The tests show that,in the continuous mobile percussive drilling equipment,the hydraulic rock drill is more effective than the pneumatic down-the-hole hammer,and the plan is feasible.The combination of TBM cutterhead and percussive drilling device can impose a unidirectional pressure on the rock and break the rock easily.The impact is applied first to form presplitting or free faces,and then the hob is used to fracture,which can effectively improve the excavating efficiency,reduce the cutter wear on the cutterhead in the process of shield construction,enhance the cuttin g ability of TBM to hard stratum in the process of hard rock excavation,and effectively improve the adaptability of boring equipment to the stratum.

关 键 词：TBM设备 冲击凿岩开挖 凿岩机 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]