大直径大坡度连续超小半径转弯TBM关键技术研究及应用

doi:10.3973/j.issn.2096-4498.2023.09.019

隧道建设（中英文） ›› 2023, Vol. 43 ›› Issue (9): 1614-1622.DOI: 10.3973/j.issn.2096-4498.2023.09.019

大直径大坡度连续超小半径转弯TBM关键技术研究及应用

王鹏星，贺飞，宁向可，僧雄飞

（中铁工程装备集团有限公司，河南郑州 450000）

出版日期:2023-09-20 发布日期:2023-10-16
作者简介:王鹏星（1991—），男，河南平顶山人，2013年毕业于武汉理工大学，机械工程及自动化专业，本科，工程师，现从事TBM设计与研究工作。E-mail： 1075560934@qq.com。

Research and Application of Key Technologies of Large Diameter Tunnel Boring Machine with Large Slope and UltraSmall Turning Radius

WANG Pengxing, HE Fei, NING Xiangke, SENG Xiongfei

(China Railway Engineering Equipment Group Co., Ltd., Zhengzhou 450000, Henan, China)

Online:2023-09-20 Published:2023-10-16

摘要/Abstract

摘要： 为解决抽水蓄能电站交通洞、通风洞开挖断面大、水平转弯半径小、纵坡坡度大且变化频繁，常规TBM无法施工的难题，以抚宁抽水蓄能电站交通洞和通风洞为背景，分析大直径、超小半径转弯、大坡度隧洞采用TBM施工的重难点，从整机方案选型、关键部件设计、出渣方式创新等方面入手，设计一种大直径大坡度超小半径转弯TBM。实践证明： 1）在抽水蓄能电站进厂交通洞和通风洞采用大直径超小半径转弯TBM施工切实可行，且具有施工效率高、环境破坏小、绿色低碳等优点； 2）采用双护盾主机并结合锚喷支护形式创新集成设计的TBM能够适应大直径超小半径转弯工况； 3）在双护盾TBM的支撑盾上集成设计钢筋排存储系统方案可行； 4）“旋转栈台+胶轮自卸车”的出渣运输体系能够解决大坡度、连续多次超小半径转弯工况下TBM出渣及物料运输难题，且施工成本相对较低，故障率相对较少，但其影响TBM掘进速度，出渣时阻碍物料运输及人员通行，不利于文明施工； 5）在连续超小半径转弯、大坡度工况下采用组合式皮带机出渣的方案是可行的，且组合式皮带机出渣方案在提高TBM掘进速度方面具有突出的优势，但其皮带跑偏调整技术和“多级控制、顺序启停”的控制系统有待进一步研究。

关键词:

大直径TBM, 大坡度, 超小半径转弯, 抽水蓄能电站, 出渣运输, “组合式”皮带机

Abstract: The construction of traffic and ventilation tunnels in pumped storage power stations often presents challenges for conventional tunnel boring machines(TBMs) due to their large excavation sections, small horizontal turning radii, as well as large and frequently changing longitudinal slope gradients. Therefore, a case study is conducted on the Funing pumpedstorage power station to analyze the focal points and difficulties of TBM construction in traffic and ventilation tunnels with large diameters, ultrasmall turning radii, and large slopes. A TBM designed with an ultrasmall turning radius, suitable for large excavation sections and slopes, is designed considering the overall selection scheme, key component design, and innovative slag transportation methods. The study concludes that: (1) The designed TBM is feasible for constructing traffic and ventilation tunnels with a large diameter, an ultrasmall turning radius, and a large slope. It offers environmentally friendly, green, lowcarbon, and highly efficient technology. (2) The doubleshield main body combined with boltshotcrete support can adapt to large diameters and ultrasmall turning radii. (3) The integration of a steel bar storage and discharge system onto the support shield of the doubleshield TBM is feasible. (4) The mucking system of the "rotating stack platform and rubbertire selfdumping truck" can address the challenges of TBM slag and material transportation under conditions of large longitudinal slopes and continuous ultrasmall turning radii, and the construction cost and failure rate are relatively low. However, it affects TBM tunneling speed and hinders material transportation and personnel passage during mucking, resulting in an uncivilized construction phenomenon. (5) The combined belt conveyor system is favorable for slag transportation under continuous ultrasmall turning radii and large slope conditions, considerably improving TBM excavation speed. However, the belt deviation adjustment technology and "multilevel control and sequential start and stop" control system need to be further investigated.

Key words: largediameter tunnel boring machine; large slope, ultrasmall turning radius, pumped storage power station, mucking and transportation, combined belt conveyor

王鹏星, 贺飞, 宁向可, 僧雄飞. 大直径大坡度连续超小半径转弯TBM关键技术研究及应用[J]. 隧道建设, 2023, 43(9): 1614-1622.

WANG Pengxing, HE Fei, NING Xiangke, SENG Xiongfei. Research and Application of Key Technologies of Large Diameter Tunnel Boring Machine with Large Slope and UltraSmall Turning Radius[J]. Tunnel Construction, 2023, 43(9): 1614-1622.

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大直径大坡度连续超小半径转弯TBM关键技术研究及应用

Research and Application of Key Technologies of Large Diameter Tunnel Boring Machine with Large Slope and UltraSmall Turning Radius

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