盾构隧道穿越泉域强富水灰岩地质掘进控制技术  

Excavation Control Technology of Shield Tunneling Through the Geology of Water-rich Limestone in Spring Area

作　　者：朱连臣 ZHU Lianchen(China Railway 25th Bureau Group Fifth Engineering Co.,Ltd.,266100,Qingdao,China)

机构地区：[1]中铁二十五局集团第五工程有限公司,青岛266100

出　　处：《城市轨道交通研究》2022年第9期160-165,共6页Urban Mass Transit

基　　金：山东省自然科学基金项目(ZR2021QE187)。

摘　　要：以济南轨道交通1号线盾构隧道穿越泉域强富水灰岩地质为工程背景,分析盾构掘进效率的影响因素,提出强富水灰岩地质刀盘、刀具选型与掘进参数控制技术。研究结果表明:影响盾构掘进的主要因素为灰岩强度高达122 MPa、裂隙水量大、盾构开挖面涌水突泥、螺旋机喷涌以及出渣与外运困难;根据刀具磨损规律,将滚刀优化为一体式滚刀,刃宽减小为19 mm,刀具中心采用楔形镶齿滚刀且刀盘增加耐磨格栅,以提升掘进效率;制定盾构穿越富水灰岩地质关键掘进参数控制范围,同步注浆量应控制在5.0~5.8 m^(3)/环,在岩溶水丰富区域应控制注浆材料的胶凝时间。In the engineering context of Ji′nan Rail Transit Line 1 shield tunnel crossing spring area water-rich limestone geology, the influencing factors of shield tunneling efficiency are analyzed, and the control technology of cutter tool selection and driving parameter for water-rich limestone stratum is proposed. Research results show that: the main factors affecting shield tunneling are that limestone strength reaching 122 MPa, large fissure water volume, gushing water and mud on shield excavation face, the screw spout, slag and outward transfer difficulty. According to the rules of tool wear, the hob is optimized to be a one-piece hob, the width of blade is reduced to 19 mm. Cutter tool center adopts wedge insert tooth hob and the abrasion resistance grille is added to cutter plate, which improves the excavation efficiency. The control range of key excavation parameters for shield tunneling through water-rich limestone geology is formulated. The synchronous grouting amount should be controlled at 5.0~5.8 m~^(3)/ring, and the cementing time of grouting materials should be controlled in karst water-rich areas.

关 键 词：济南轨道交通 盾构隧道 掘进控制 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]