贵阳岩溶地区盾构机配置的几点思考
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摘要
贵阳地区将首次采用盾构法施工地下区间隧道,通过对贵阳工程地质及水文地质条件进行分析,对贵阳岩溶地区盾构机的配置提出建议。经研究,盾构整机方案可采用主动铰接方式或被动铰接方式;盾构机面板建议采用复合式刀盘,刀盘开挖直径建议控制在6 450 mm~6 470 mm,开口率建议控制在35%左右;刀具配置建议采用滚刀、刮刀相结合的方案;为防止喷涌,盾构机建议采用单螺旋输送机+双闸门设计+聚合物改良+预留保压泵接口方案,且在盾尾安装三道密封钢丝刷;为适应岩溶地区盾构施工,盾构机建议配置超前钻机及注浆设备,并预留超前钻通道及密封装置;盾构面板建议开口均匀,配备土仓高压水冲刷系统,刀盘面板预留注入泡沫通道,以防备结泥饼现象;盾体建议采用梭型结构,配备壳体润滑孔,并设计主机脱困及后退能力,以防止卡盾。
The shield tunneling will be firstly used in the underground interval tunnel of Guiyang. Based on the analysis of the engineering geology and hydrogeological conditions in Guiyang, the suggestions are made for the configuration of shield machines in the karst area of Guiyang. After study, the general scheme of shieldmachine can be designed as active or passive articulated systems. The panel of shield machine is recommended of compound cutter. The excavation diameter of cutter is suggested to control in 6 450~6 470 mm,and the opening rate is proposed to control at about 35%. The configuration of cutting tools is recommended by the combination of gear hob and scraper. In order to prevent the flowing, the scheme of single screw conveyor + double-gate design + polymer improvement + reserved pressure maintaining pump interface is proposed to use for the shield machine, and also three seal steel wire brushes are installed at the end of shield machine. In order to adapt the shield construction in karst area, the shield machine is advised to configure the advance drill rig and grouting equipment, and the advance drilling channel and sealing device are reserved. The shield panel is recommended by the uniform opening equipped with the high-pressure water scour system, and the cutter panel is reserved for injecting foam channel to prevent the phenomenon of mud cakes. The shield is recommended of the shuttle structure equipped with the shell lubrication holes, and the abilities of the mainframe to escape and retreat are designed to prevent the shield death.
The shield tunneling will be firstly used in the underground interval tunnel of Guiyang. Based on the analysis of the engineering geology and hydrogeological conditions in Guiyang, the suggestions are made for the configuration of shield machines in the karst area of Guiyang. After study, the general scheme of shieldmachine can be designed as active or passive articulated systems. The panel of shield machine is recommended of compound cutter. The excavation diameter of cutter is suggested to control in 6 450~6 470 mm,and the opening rate is proposed to control at about 35%. The configuration of cutting tools is recommended by the combination of gear hob and scraper. In order to prevent the flowing, the scheme of single screw conveyor + double-gate design + polymer improvement + reserved pressure maintaining pump interface is proposed to use for the shield machine, and also three seal steel wire brushes are installed at the end of shield machine. In order to adapt the shield construction in karst area, the shield machine is advised to configure the advance drill rig and grouting equipment, and the advance drilling channel and sealing device are reserved. The shield panel is recommended by the uniform opening equipped with the high-pressure water scour system, and the cutter panel is reserved for injecting foam channel to prevent the phenomenon of mud cakes. The shield is recommended of the shuttle structure equipped with the shell lubrication holes, and the abilities of the mainframe to escape and retreat are designed to prevent the shield death.
引文
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[12]蒲毅,刘建琴,郭伟,裴瑞英.土压平衡盾构机刀盘刀具布置方法研究[J].机械工程学报,2011,47(15):161-168.
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[14]宁小平.富水地层土压平衡盾构防喷涌施工技术[J].福建建材,2016,(4):85-88.
[15]竺维彬,钟长平,黄威然,等.盾构掘进辅助气压平衡的关键技术研究[J].现代隧道技术,2017,54(1):1-8.
[2]章新华.地铁盾构过硬岩施工技术[J].铁道建筑,2011,(8):61-63.
[3]廖鸿雁.盾构工程在岩溶发育区的综合技术与实践[J].都市快轨交通,2010,23(3):41-46.
[4]廖景.地铁盾构区间岩溶处理[J].广东土木与建筑,2011,(11):25-28.
[5]黎新亮.盾构隧道穿越湘江溶洞区工程风险分析及应对措施探讨[J].铁道标准设计,2014,(2):64-70.
[6]郭志峰,郑勇,郭县华.洞内超前钻探注浆在盾构过溶洞区的施工技术[J].铁道建筑技术,2015,(3):20-24.
[7]杨育僧,吴昊,许建飞,杨小强.岩溶地层中的盾构隧道施工[J].铁道工程学报,2007,(7):56-60.
[8]乌健.广州地铁岩溶区盾构施工地层变形特性研究[J].铁道建筑,2012,(8):50-53.
[9]秦磊,李宗艺.隧道岩溶处理技术[J].中国科技博览,2013,(34):325-325.
[10]李慎奎,陶岚.武汉地区岩溶发育特征及地铁工程中岩溶处理[J].隧道建设,2015,35(5):449-454.
[11]戴亚军,张国柱,刘婷.地铁盾构工程岩溶病害处理方法的应用研究[J].西部交通科技,2014,(8):62-65.
[12]蒲毅,刘建琴,郭伟,裴瑞英.土压平衡盾构机刀盘刀具布置方法研究[J].机械工程学报,2011,47(15):161-168.
[13]陈馈.盾构刀具关键技术及其最新发展[J].隧道建设,2015,35(3):197-203.
[14]宁小平.富水地层土压平衡盾构防喷涌施工技术[J].福建建材,2016,(4):85-88.
[15]竺维彬,钟长平,黄威然,等.盾构掘进辅助气压平衡的关键技术研究[J].现代隧道技术,2017,54(1):1-8.