超特长隧洞TBM集群掘进分析及施工技术研究  

Study on Boring Indexes and Key Issues of Tunnel Boring Machine Cluster Construction of Super-Long Tunnels

作　　者：邓铭江[1] 谭忠盛[2] DENG Mingjiang;TAN Zhongsheng(Xinjiang Erqis River Basin Development and Construction Administration Bureau,Urumqi 830000,Xinjiang,China;School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]新疆额尔齐斯河流域开发工程建设管理局,新疆乌鲁木齐830000 [2]北京交通大学土木建筑工程学院,北京100044

出　　处：《隧道建设（中英文）》2021年第11期1809-1826,I0003-I0020,共36页Tunnel Construction

摘　　要：北疆供水工程隧洞总长514 km,采用18台敞开式TBM集群施工,其规模之大国内外罕见。为了解其掘进规律,对2年来集群掘进的设备参数与相关指标、卡机及支护等问题进行统计分析。该工程18台TBM平均月进尺385.2 m,最高月进尺1136 m,平均利用率28%,平均完好率91%,平均故障率9%,每延米掘进更换滚刀0.02~0.45把,说明设备的适应性较好,但同时也存在刀具异常磨损、连续皮带机及锚杆钻机故障率高等问题;在长距离TBM集群掘进过程中,应针对不同卡机类型、不同涌水情况采取针对性处理措施,隧洞支护形式及支护参数设计应与TBM设备特点、施工特点相适应,设备设计制造方面也应针对锚杆打设不垂直岩面等问题予以改进。总体来看,TBM集群掘进的效率较高,但也存在一些问题,要达到安全高效掘进的长久目标仍需不断努力。The total length of the tunnel created during the water supply project in northern Xinjiang is 514 km,consisting of 18 open tunnel boring machine(TBM)clusters.Work on this scale is rare,both in China and abroad.To understand the boring law,the authors make a statistical analysis of the equipment parameters and related indexes,machine jamming,and the support of cluster tunneling over the past 2 years.The average monthly footage of the 18 machines used in the project was 385.2 m,the highest monthly footage was 1136 m,the average utilization rate was 28%,the average intact rate was 91%,the average failure rate was 9%,and the number of cutter changes per extension meter was 0.02~0.45,indicating that the equipment has good adaptability.However,there were also some problems,such as abnormal cutter wear,high belt and anchor drill failure rate.In the process of long-distance TBM cluster tunneling,targeted treatment measures should be taken according to different jam types and different water gushing conditions.The tunnel support form and support parameter design should be adapted to the construction characteristics of the equipment,and the equipment should also be improved during manufacturing according to problems that arise,such as bolting non-vertical rock surface.In general,the efficiency of TBM cluster tunneling is high,but there are still some issues,and it remains necessary to make continuous efforts to achieve the long-term safe and efficient tunneling.

关 键 词：超长隧洞 TBM集群 掘进指标 卡机处理 支护技术 

分 类 号：U45[建筑科学—桥梁与隧道工程]