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Herrenknecht tunnel borers continue success story in L.A.

Los Angeles is a vibrant center of international film art and innovation - not just on the surface. The area below ground is the scene of state-of-the-art engineering achievements. German high-tech machines from Herrenknecht are creating underground arteries for the American city. Tunnel boring machine (TBM) , Harriet successfully completed her drive for the Crenshaw/LAX Transit Project in April 2017. Angeli just finished digging the first of two tunnels for the Regional Connector Transit Corridor on July 18th. From spring 2018 onward the tunnel boring stars will have additional company: for each of the "Purple Line Extension Sections 1 + 2", two more Herrenknecht TBMs will be working their way through the difficult ground. All three projects are part of the strategic subway extension in L.A. to relieve the traffic above ground.

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Tunneling

Robbins TBM Takes on Eighth Bore for Galerie des Janots Project

A Robbins TBM, recently christened “Augustine”, is being commissioned to undertake its eighth bore after being launched by contractor Eiffage Civil Engineering on March 3. The TBM, which was extensively modernized and upgraded during the rebuild for the Galerie des Janots project in La Ciotat, France, has previously completed seven other successful projects across Europe and Hong Kong. This time, it will bore the Janots gallery to improve access to water in the communities east of the Aix-Marseille-Provence metropolis (Cassis, Roquefort-la-Bédoule, La Ciotat and Ceyreste). "It’s a single machine 3.5 meters (11.5 ft) in diameter, 250 metric tons (275 US tons), and 135 meters (443 ft) long, that will work 24 hours a day for almost 10 months during this operation,” says Marc Dhiersat, Project Director of Galerie des Janots for Eiffage.

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Water & Sewer Construction
Tunneling

McLaughlin launches new 60-inch auger boring machine

McLaughlin launched its biggest machine to date at the CONEXPO-CON/AGG 2017 trade show. The McL-60 Workhorse is a 60-inch (152.4-cm) auger boring machine designed with operator convenience in mind. The low-profile engine design, remote control operation and Rabbit Travel help water, sewer and pipeline contractors install large-diameter casings at a lower cost than directional drilling

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Tunneling

McLaughlin debuts first-of-its-kind Steerable Rock System for auger boring

McLaughlin introduced the groundbreaking Steerable Rock System (SRS) at the CONEXPO/CON-AGG 2017 trade show. The SRS is the auger boring market’s first steerable head designed to navigate not only solid rock but difficult fractured rock conditions as well. Engineered to operate in rock up to 25,000 psi, the SRS allows operators to maneuver auger boring machines even in the toughest ground conditions for an on-grade bore.

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Tunneling

Robbins Double Shield digs the Andes

Chile’s Los Condores HEPP is a high cover, hard rock challenge, with 500 m (1,640 ft) of rock above the tunnel and a high-altitude jobsite 2,500 m (8,200 ft) above sea level. As of January 2017, a 4.56 m (15.0 ft) Robbins Double Shield TBM had completed boring its 900 m (2,950 ft) long access tunnel and was well on the way to boring the first section of headrace tunnel.  The machine embarked on its journey on May 27, 2016, and has since excavated over 1,300 m (4,270 ft) of tunnel in total.

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Tunneling

Introducing the Guide Rod Swivel (GRS-50) family of cutter heads

The GRS-50 Cutter Heads meet the outside diameter of common steel casing pipe in 24-inch (610 mm), 30-inch (762 mm), 36-inch (914 mm) and 42-inch (1,067 mm) diameters.

To achieve guided boring steel casing installations in deep, densely compacted ground and soft rock, Akkerman announces the newest solution in the Guided Boring Machine (GBM) equipment line, the Guide Rod Swivel (GRS-50) family of cutter heads with a universal bearing swivel. The robust GRS-50 family contains four sizes of high thrust bearing upsizing tools able to withstand up to fifty tons of continuous thrust loads on guided boring, guided auger boring, and soft rock pilot tube projects.

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Tunneling

Robbins' TBM dubbed “Driller Mike” digs Atlanta

The Robbins Main Beam TBM, dubbed “Driller Mike”, was launched on Atlanta, Georgia, USA’s Bellwood Tunnel in October 2016.

After an Onsite First Time Assembly (OFTA) lasting just 2.5 months, Atlanta Georgia, USA’s newest TBM, dubbed “Driller Mike”, made its initial startup on October 13, 2016 and ramped up to full production two weeks later. Atlanta’s Mayor Kasim Reed and city officials gathered with local and national media to celebrate the occasion. The 3.8 m (12.5 ft) diameter Robbins Main Beam TBM is now boring the 8.0 km (5.0 mi) Bellwood Tunnel after being walked forward 100 ft into a starter tunnel. The Bellwood Tunnel path will travel from an inactive quarry and run below a water treatment plant and reservoir before ending next to the Chattahoochee River.

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Tunneling

Hard-working Robbins TBM boring 28 km of tunnels below Indianapolis

The S-K JV stands proudly in front of the cutterhead for the 6.2 m (20.2 ft) diameter Robbins TBM currently boring the DigIndy tunnels.

On Tuesday, September 6, 2016, one of the longest-running Robbins TBMs embarked on its most extensive project yet. The 6.2 m (20.2 ft) Main Beam machine, owned by the Shea-Kiewit (S-K) JV, is boring the 8.5 km (5.3 mi) long White River Tunnel as the first in the next phase of the DigIndy wastewater tunnels below Indianapolis, Indiana, USA. In addition to that work, the machine will bore the Lower Pogues Run, Fall Creek, and Pleasant Run Tunnels—a scope of work totaling about 28 km (17 mi) through limestone and dolomite rock.

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Horizontal Directional Drilling
Tunneling

Extend your mud recycler’s lifespan

When moving equipment, John Miller advises to wash the machine thoroughly
to remove all mud and debris.

Equipment maintenance is a topic that no contractor particularly wants to address, but in light of the ever growing need to maximize production and cut down time it is extremely important. Your equipment will only continue to work properly if you take the time to perform simple routine maintenance.

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Tunneling

Robbins achieves another breakthrough in Bangalore

EPB Kaveri in the launch pit at Chickpet in March 2015

On June 8, 2016, one of two 6.4 m (21.0 ft) diameter mixed-face EPB machines broke through at Namma Metro. After being launched in March 2015, the TBM named Kaveri made its way through its difficult 750 meter (2,460 ft.) drive from Chickpet to Majestic. Sister machine Krishna, launched in December 2015 is not far behind, and is expected to break through in approximately two months.

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Tunneling

How hyperbaric tunnelling support keeps repair technicians healthy

A member of the hyperbaric intervention support team, inside the airlock. The workers are often certified commercial divers.

Divers must constantly keep track of their depth and dive time in order to prevent decompression sickness, otherwise known as the bends. Because divers are breathing air while they are pressurized by the surrounding water, the diver’s tissues absorb gases (mostly nitrogen) from the breathing air. The deeper the diver goes and the longer he stays there, the more gas his body absorbs. When the diver returns to the surface and the pressure is relieved, these accumulated gases start to leave the body. If the pressure is relieved too quickly, bubbles can form. These bubbles in the diver’s tissues are the cause of decompression sickness. Nitrogen bubbles can cause joint pain and in extreme cases, impaired brain, spinal cord and lungs function.

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Tunneling

Shanghai Construction Group makes North American tunnelling foray

The design of the SA1a truck sewer required trenchless construction in three stages, including a 262-m drive underneath the Anthony Henday ring road.

The recent construction of a major trunk sewer line in Edmonton to accommodate new development is significant for a number of reasons, most significantly that it is the first time a Chinese company has done tunnelling work in North America.

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Tunneling

Topcon announces monitoring partnership with VMT GmbH

Topcon Positioning partnership with VMT to introduce the all-new modular Topcon Delta product portfolio.

Topcon Positioning Group announces the launch of Topcon Delta, its new deformation monitoring solution for construction, tunneling and mining. Topcon Delta is a system of software and hardware components, which delivers accurate and reliable monitoring measurements and associated reporting to provide protection of assets during works.

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Tunneling

Rosemont Double Shield on a roll for Robbins

The 3.0 m (9.8 ft) diameter Robbins Double Shield TBM bored a 4 km (2.5 mi) tunnel below downtown Montreal.

In a large November 2015 ceremony attended by the mayor of Montreal,, and representatives from local media outlets, the Rosemont Reservoir tunnel construction came to a close. The long-awaited project, more than 38 years in the making, gave cause for celebration as crew members crowded around the cutterhead of the 3.0 m (9.8 ft) diameter Double Shield TBM that had emerged into an exit shaft.

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Tunneling

Seattle TBM starts tunnelling again

Bertha, the SR 99 tunnelling machine, is now tunnelling in Seattle soil after breaking through the access pit wall on January 6th.  After being out of commission for about two years, Seattle Tunnel Partners (STP) has mined 73 feet and installed 12 concrete tunnel rings since Bertha first moved forward in the pit on Dec. 22. 

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Tunneling

Tunnelling for Vancouver's Evergreen Line complete

The TBM, nicknamed Alice, drilled a two-kilometre tunnel starting east of Barnet Highway in Port Moody to south of Kemsley Avenue in Coquitlam.  – Evergreen Line

Officials announced on November 27 that tunnelling has completed on the Evergreen Line, a new addition to Metro Vancouver's light rail system known as SkyTrain. 

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Tunneling

Bertha tunnels into next phase of testing

The State Route 99 tunneling machine entered its next phase of testing early Tuesday, Dec. 22, near Pier 48, moving forward and installing a tunnel ring at the bottom of the 120-foot-deep pit crews built to access and repair the machine. Seattle Tunnel Partners, the Washington State Department of Transportation's design-build contractor for the tunnel project, plans to tunnel a short distance further in the access pit tunnel before giving crews a break for the holidays.

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Tunneling

Røssåga Main Beam sets Norwegian milestone

The Robbins Main Beam machine was launched in January 2014 and overcame hard rock, water inflows, and more. Photo credit: Statkraft

A crowd of crew members gathered to celebrate in front of a newly-emerged hard rock TBM on December 10 in northern Norway, but their celebration was about more than just a breakthrough. The 7.2 m (23.6 ft) diameter Robbins Main Beam machine had traversed hard rock, water inflows, and more to become the first TBM used in the country since over 20 years. 

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