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Author: Robbins
Rescuing and Rebuilding TBMs in Adverse Ground Conditions
Modern TBMs deliver high performance with availability rates that are beyond 90%. The TBM design concepts make the machines highly versatile for employment in varying soil and ground conditions. Machines can now withstand extreme loads and impacts in rough underground environments because of the components made for longtime use. Regular maintenance and planned service is the vital element in prolonging a machine’s life and for high performance and availability. A well-serviced machine provides excellent performance as well as active project safety. Proper operation in variable conditions is also key. For instance, a hard rock TBM may run into zones of swelling rock. The most appropriate method to overcoming the swelling rock is to keep going, avoiding any unnecessary stops. Worn disc cutters that have not been maintained in due course are a prominent example of such avoidable stops, which may result in long downtimes and severe damage to the machine. However with modern and advanced techniques to underground tunneling, rescuing and rebuilding TBMs is possible to save the project. This paper discusses methods and tools for modern TBM service and maintenance using present case studies about TBM rebuilds in extreme project conditions.
Extreme Ingress: Managing High Water Inflows in Hard Rock TBM Tunneling
Managing water inflows is not new to TBM tunneling, but today there are an increasing number of methods and best practices to handle potentially high water inflows efficiently and safely. High volumes of water can be safely contained or managed in hard rock TBM tunneling, but this requires the proper foreknowledge and planning. This paper outlines how machines can be designed ahead of time for expected high water, and how risk can be mitigated during tunneling. It also covers the importance of pre-planning and includes a look into the future of water control methods. Case studies of hard rock tunneling with heavy water inflows are examined, with a focus on New York, USA’s Delaware Aqueduct Repair, the 3.8 km long bypass tunnel below the Hudson River requires excavation through limestone rock at water pressures of up to 20 bar. A unique 6.5 m diameter Single Shield TBM, sealable for high pressure excavation, is boring and lining the tunnel.
Challenging Mixed Face Tunneling at India's Sleemanabad Carrier Canal
India’s Sleemanabad Carrier Canal is a prime example of just how challenging mixed face conditions can be, although other examples exist. The water transfer tunnel is being bored using a 10 m diameter hybrid-type rock/EPB TBM. However, in 6.5 years of tunneling the machine had only advanced 1,600 m. Commercial issues for the original contractor stalled the project frequently, while ground conditions turned out to be even more difficult than predicted. Low overburden of between 10 and 14 m, combined with mixed face conditions, transition zones and a high water table restricted advance rates. The TBM manufacturer mobilized a team to refurbish the TBM and within a period of 6 weeks a team of 180 people had been deployed to take over all aspects of tunneling and support activities. Production rates improved dramatically as the TBM advanced more than 400 m in four months. This paper discusses the problems faced and the methodology that enabled good advance rates in highly variable mixed face conditions.
TBM DiGs 2019
Event Name: Tunnel Boring Machines in Difficult Grounds (TBM DiGs)
Dates: November 14-15, 2019
Location: Golden, Colorado
Venue: Sheraton Denver West Hotel
Booth No: 12
The 2019 Tunnel Boring Machines in Difficult Grounds (TBM DiGs) 4th International Conference will be held in Golden, Colorado, USA from November 14-15. Stop by our booth to speak with our international experts or learn more at our two technical presentations:
Thursday November 14, 3:00 PM
Technical Session IV: New Technology and Extreme Tunneling
Effective design and assembly of a large diameter slurry TBM in hard rock
conditions presented by Matt Greger
Friday November 15, 10:50 AM
Technical Session VI: Hard Rock Tunneling Challenges
TBM tunneling in extremely hard rock presented by Sindre Log
跨模式掘进三维动画: 罗宾斯跨模式掘进机XRE
罗宾斯跨模式隧道掘进机是世界上最具挑战性的隧道项目的适应性解决方案。这个视频解释了罗宾隧跨模式掘进机XRE，一个兼并的硬岩和土压平衡开挖模式的掘进机，为什么他们是在世界各地解决混合地质隧道的最佳方案。
免费网络研讨会：如何通过挤压地质、岩石破碎等
如果你曾经面对过穿越重山的隧道条件，那么你知道面对未知是什么。大多数深埋高覆隧道都会遇到一些意想不到的情况，无论是断层带、挤压地面还是岩石爆破。如果没有适当的规划、施工经验和掘进机设计，这些挑战可以迅速阻止掘进机在其路径上掘进。从可以有效避免卡住盾体的严重地质，到可以损害掘进机的高压超挖，开挖重山隧道可以掘进的十分迅速。
那么，当情况变得困难时，如何保持隧道掘进机的掘进？与我们的隧道专业人士共度60分钟，在这场免费网络研讨会上学习最好的东西，这是我们2018年系列的第一次。通过实际案例研究，我们将讨论几十年来在现场隧道施工中遇到的一些最困难的条件。了解如何克服障碍，同时尽量减少停机时间，确保施工人员的安全。
点击浏览网络研讨会的视频
跨模式XSE掘进机参数表
如果您的项目含有高通透性的土壤夹杂地透性的地质，跨模式XSE掘进机是您的方案。
跨模式XRE掘进机参数表
无论您的项目地质包括硬岩、软土、巨石，还是一些其他东西，罗宾斯都能为您提供解决方案。并非所有项目都符合特定掘进机类型的参数，在罗宾斯，我们认为您的机器应根据您独特的项目要求进行定制设计。跨模式掘进机XRE提供了兼并土压平衡(EPB)和硬岩单护盾(Rock)作业模式的的最佳功能。
主梁式掘进机参数表
罗宾斯主梁机具有高性能(HP)特征，包括大直径掘进机，可变频率电动马达，和灵活的围岩支护系统。他们的设计包括一个旋转的刀盘(直径从17英寸到20英寸)，是掘进的最佳选择。
土压平衡盾构机参数表
罗宾斯已经将60多年的掘进机设计和现场经验整合到我们创新的土压力平衡盾构机（EPB）中。罗宾斯的土压平衡盾构机采用与我们的硬岩隧道掘进机相同的坚固结构和经过时间测试的设计，但其功能完全适用于软土和混合地质。