2018年9月18日，一台直径13.7米的罗宾斯超大直径泥水平衡盾构机，为日本广岛高速公路5号线项目，始发掘进，开挖坚硬的岩石地质隧道。 这台盾构机在这个狭窄的城市工地始发，全靠采用现场首次安装调试的方案（OFTA）。施工商大林大成广成建设工事合资公司对工期的要求十分严格，在机器组装上只给予8个月的工期。”这个组装工期非常重要。在掘进机组装完成后，我认为OFTA方案很适用于这个项目。” 大林大成广成建设工事合资公司项目副经理赤井亮太说道。
罗宾斯副总裁Doug Harding和工程师Greg Michaelson将在这场免费的60分钟网络研讨会上探讨混合地质的情况，深入研究盾构机和跨模式掘进机在该领域的最新案例研究。Harding和Michaelson将根据我们众多现场服务人员的经验，根据成熟的设计和方法提出建议。无论你是一个操作掘进机的承包商，一个指定设备的顾问，还是一个即将开始的项目的业主，在不同的地质条件下，持续良好的挖掘都是可能实现的。
Traveling in the tunneling industry is basically a regular commute for some. A lot of us don’t think twice about the destination, we just do it with a mission in mind. My mission as Robbins Marketing Manager was this: a small conference in Ho Chi Minh City. Okay, easy! As the date approached, about a month before, I kept hearing about how well our Main Beam TBM was doing in Vietnam, at the Thuong Kon Tum Hydroelectric project, despite a gauntlet of challenges. I talked to some project engineers and field service personnel who told me it was in a remote location in Kon Tum Province. And then I heard more about traveling to that site: a 6-hour drive from Da Nang, through nauseating windy, narrow roads, climbing elevations with no speed limits to speak of. But that’s cool, I thought, glad I don’t have to go on that ride.
“Wait, why not just go to the jobsite for a video and photo shoot? We can have it ready for the breakthrough in October,” says Desiree Willis, Robbins PR manager a couple weeks later. What!? A few days after that, it was all planned. Ron, our videographer, Ken, our photographer, and Keri Lin, our marketing manager from Robbins China, set off with me on a last-minute adventure. The 17.4 km long Thuong Kon Tum HEPP tunnel will be the country’s longest once complete. A 4.5 m diameter Robbins Main Beam TBM and continuous conveyor system were supplied to bore a section of the tunnel.
Maybe because I was bracing myself for the worst as far as the drive goes, I didn’t feel like it was that bad. The scenery was jaw dropping with lush jungle, rice paddies and scenic villages, and so many distractions on the sides of the road that I just completely avoided looking ahead. Problem solved! The coolest distractions were the scooters driving on these mountain roads: what they were carrying, how many people were on them, their driving technique. My favorite site was seeing a whole family of people—a 5-year old kid in the front, the dad driving, the mom in the back and a toddler sandwiched in between the parents—on a run-down 125 cc scooter. Then there’s the animals: a litter of stray dogs, adorable black piglets making road crossings that almost made me swear off bacon, herds of cows, goats, etc.
But how the heck did they get the machine, assembled by Onsite First Time Assembly (OFTA), to the site? Apparently, the previous contractor built portions of the roadway to the jobsite while components were staged at the port site. Several bridges, previously built only for light traffic with scooters and carts, were rebuilt or reinforced in order to carry the heavy TBM components. In a road conditions survey report by logistics firm SDV Vietnam Company Ltd., the original bridges were described as “having no shoulder”, and as having “blind corners and sharp curves”. The OFTA process allows a TBM to be assembled on location, saving time and money in terms of shipping costs and project schedule. The machine had successfully made it to the site, as it had launched in 2012.
Upon arriving at the jobsite, I was immediately impressed with the site and the surroundings, especially after hearing about all of the challenges the project had back when the TBM was launched, under a different contractor. The TBM launched into complex rocky conditions that turned out to be quite different than in the original geological study. The machine sat abandoned 2.6 km into the tunnel with equipment sitting idle for months, waiting for a change in circumstances. In 2015, Robbins signed a contract with the project’s new contractor CC47 to supply full refurbishment and to operate the equipment with a full Field Service team. Since then, Robbins Field Service has generally been kicking butt.
The machine was running as expected, so filming interviews and the machine went smoothly. I learned a lot from the interviews, mainly from the Robbins guys we interviewed—PN Madhan, Robbins Engineering Geologist, and Greg Adams, Robbins Field Service Manager. “It’s a workhorse of a machine and still in great condition, considering all of the difficult ground it’s been through,” Greg mentioned. Massive granitic rock wasn’t the only challenge they faced—the team also endured a handful of major fault zones requiring rock bolting and the use of the McNally Roof Support System, as well as some huge water inflows.
Greg did warn our photographer and videographer that they were going to face heat with extremely high humidity. When John McNally, Robbins Field Service Manager-Asia, took over the project site, he managed refurbishment of much of the equipment inside the tunnel along with the camp’s living quarters. This included adding a ventilation tube, keeping the tunnel at a cool 34°C. That’s the temperature AFTER installing the ventilation. Read more about the challenges here.
The crew at the camp quarters, and the jobsite in general, were very welcoming. Greg and Taylor Hwang, Robbins project manager, arranged for a special dinner just for us on the first night—steak and French fries, an American staple! The crew on site mainly consists of English-speaking expats, Chinese, Thai, Vietnamese, Indian and Philippine guys, so the cuisine varied every day. We hung around that night for a while, listening to stories from some of the field service crew. This is while we were fawning over the pet falcon that one of the field service guys owned. I think the falcon liked living there, because his string wasn’t even tied to the perch at one point. Taylor told us that there were some families and children of the crew living there, who had to find ways to pass the time in this little remote village. He even told us they had pet monkeys at one point. I peeked into a living quarter and saw a drum set made with those Danish butter cookie tins that you get at Christmas. That’s one way to pass the time! Before we were about to leave, some of the Thai people at the site had brought in a bucket with a cover over it. I was curious and went to take a peek, because they started adding salt to the buckets. It was about 30 river snakes (possibly river eels, but they called them snakes) writhing violently because of the sodium touching their skin. Then they started preparing them one-by-one, sticking a nail into their heads and gutting them. It was quite mesmerizing, really.
We only had two full days of shooting video and photos. Before the 6-hour drive back to Danang, all of us got caffeine-drunk on two strong Vietnamese coffees served with condensed milk each. I suspect it’s the perfect combination of the tenaciously strong espresso dripped into a puddle of pure sugar syrup (condensed milk) that singlehandedly causes adult ADHD from the first sip. During the drive down (which was much worse, I didn’t realize how much elevation we climbed going up), we were already reminiscing about the stories and experiences shared at the jobsite. When talking to the field service crew, they were all excited for the coming breakthrough later this year, but it seemed they were just a bit melancholy too. They were at this site for years, in a tiny remote village in the mountains of Vietnam, building friendships and routines. With only a handful of meters left to go on the tunnel, they’ll soon be off to the different parts of the world where they came from. I’m fortunate to have experienced everything I did on this trip and can’t wait to come back to this beautiful country.
近日，一台直径9.26米的罗宾斯跨模式掘进机(XRE) 在美国俄亥俄州亚克朗运河拦截隧道(OCIT) 穿越终点线。跨模式掘进机 (XRE) 兼并硬岩掘进机和土压平衡盾构机的作业模式特点，配备的复合刀盘可以应付硬岩或松软地质。而在松软和混合地质条件下，机器在封闭模式下操作，一旦碰到坚固岩石，工作人员可以切换到开放模式进行挖掘。
这台跨模式掘进机是专门为该项目的地质量身定制的，隧道穿越从土壤到部分页岩层再转变为全页岩层岩石。“这个工程最具挑战性的一点是我们一开始就直接进入了最困难的地质部分。我们遇到长60米软土地质，从一个非常短的范围直接进入长180米混合地质段。”肯尼建筑工程公司(Kenny Construction)的项目经理David Chastka说。“我把我们公司熟悉这个领域的每个人，包括罗宾斯在内的每个人，都一起来攻克这段开始的240米隧道”
美国俄亥俄州亚克朗市的OCIT项目由一个运输和存储隧道系统组成，用于控制亚克朗市区多个调节道的下水道溢流(CSOs)。环保局（EPA）委托的项目包括长1.89公里的隧道，以及沉井、引水结构、加固污水管道以及相关结构工程。“俄亥俄州运河拦截隧道是本市历史上最大的公共改善工程，也是对我们的环境和基础设施重大投资，可以让未来亚克朗市居民和企业长久受益。” 亚克朗市市长Daniel Horrigan说。“这种项目本身是有风险的，我感到无比自豪，隧道工程在没有重大人员受伤的情况下圆满完成，多亏了一支专业的特别团队。”
罗宾斯和合资承包商Kenny/Obayashi共同努力，在亚克朗俄亥俄运河拦截隧道实现了短期启动计划。现场服务人员协助掘进机组装，并培训施工人员，以实现顺利始发。简而言之，Kenny Consturction的项目经理David Chastka就与罗宾斯现场服务团队合作分享感受。
在这短视频，Kenny Construction的项目经理David Chastka，分享罗宾斯的现场服务和他的团队如何在亚克朗俄亥俄运河拦截隧道项目上，一起攻克挑战与困难。
Event Name: TAC/NASTT-NW Tunnelling & Trenchless Conference
Dates: November 8-9
Location: Edmonton, AB, Canada
Venue: Fantasyland Hotel at the West Edmonton Mall
Robbins Utility Tunneling Manager, Tom Fuerst, will be presenting “Lessons Learned at Montreal’s Rue Jarry Project: Overcoming Flooding and Rebuilding a TBM to Finish on Schedule,” at this year’s TAC/NASTT-NW Tunneling & Trenchless Conference. The show will be held on November 8 and 9 in Edmonton, Alberta.
Event Name: Cutting Edge 2018
Dates: October 29-31, 2018
Location: Atlanta, Georgia
Venue: Lowes Atlanta Hotel
The Robbins Company is heading south for Cutting Edge, which is being held this year in Atlanta, Georgia from October 29 through 31. Visit table 7 between presentations, including a panel discussion with Robbins President Lok Home and a presentation by Robbins Director of Engineering Brad Grothen, to discuss current projects and tunneling techniques.