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Upcoming Tunneling Projects – Tunnel


Upcoming Tunneling Projects

Laguna Beach
Tunnel   Stabilization   and   Sewer   Pipeline   Replacement
Approved by the South Coast Water District Board of Directors in 2010 and the City of Laguna Beach in late 2013, the Tunnel Stabilization & Sewer Pipeline Replacement Project (Tunnel Project) is a 100-year solution to protect the environment, local economies and neighboring communities. The project comprises two key components:

  • Tunnel Stabilization: The District will enlarge the size of the tunnel from an average of 6 to 9 ft. This will ensure safer working conditions and greater access for future pipeline maintenance and repair. Permanent shotcrete lining and steel supports will be installed at several locations where required, replacing rotten timber supports and removal of loose rock that currently exist.
  • Pipeline Replacement: The District will install a new 24-in. pipeline throughout the tunnel. The current pipeline – also 24 in. in diameter – will be encased in concrete, but preserved for redundancy and emergency use.

The cost to repair the tunnel is estimated at approximately $90 million and will be funded through low-interest state loans, grants and the District’s general fund. Shortlisted tunnel contractors announcement was anticipated for 2014-2015 with request for bids expected in 2015 and NTP in 2015-2016.

Los Angeles
The   North East   Interceptor   Sewer   (NEIS)   Phase   2A
The North East Interceptor Sewer (NEIS) Phase 2A project is currently the northern extension of the NEIS Phase 1 project. The project will construct approximately 3.03 miles of 8-ft diameter sewer in tunnel and associated structures. The sewer will be constructed from the Division St. Shaft site, near the intersection of San Fernando Road and Cazador Street and terminate at the northern overflow parking lot for the Pony and Train […]

World Tunnelling News

Jan 05, 2016 – Helsinki-Tallinn fixed link seems feasible Yle Uutiset
Jan 04, 2016 – India awards large $1.5 billion road link contract India Times
Jan 01, 2016 – Bangladesh to improve infrastructure BD News 24
Dec 30, 2015 – India’s longest road link to open in July NDTV
Dec 29, 2015 – India envisages first underwater link India Times – India Today
Dec 29, 2015 – China opens longest lake crossing GB Times
Dec 28, 2015 – Japanese court ruling on fatal ceiling collapse The Yomiuri Shimbun – Japan News
Dec 28, 2015 – Shanghai completes 13th river link Shanghai Daily
Dec 26, 2015 – Bids placed for Istanbul mega-project Daily Sabah
Dec 25, 2015 – Complex Singapore road link delayed Straits Times
Dec 25, 2015 – Ottawa LRT enters final phase Ottawa Sun
Dec 22, 2015 – Rio Metro Line 4 needs more funding The Rio Times
Dec 20, 2015 – Work starts on Auckland’s City Rail Link
Dec 18, 2015 – Study looks at replacing old Baltimore rail link The Baltimore Sun
Dec 14, 2015 – US transportation bill boosts Hudson rail project New York Times
Dec 14, 2015 – Cost of Mumbai Metro Line 3 underestimated The Indian Express
Dec 14, 2015 – Cologne LRT […]

Geotechnical Engineering | Civil and Environmental Engineering at Illinois


Alumni of CEE’s Geotechnical Engineering program have made significant contributions to major projects like subway systems in the nation’s largest cities, the Hoover Dam and the World Trade Center. Today, geotechnical engineering faculty members have expertise in earthquake engineering, soil mechanics behavior, foundation engineering, rock mechanics and tunneling, and advanced numerical modeling techniques.

Research interests of the Geotechnical Engineering faculty include:

  • Deep excavations
  • Earthquake engineering
  • Numerical modeling
  • Static and dynamic Soil-structure interaction.
  • Engineering properties, construction problems, and ground modification technology in soft clays and silts, stiff clays and soft rocks, and granular materials
  • Soil-structure interaction
  • Reliability-based design
  • Mechanically stabilized earth and earth support systems
  • Ground improvement methods and their effect on structures
  • Soil liquefaction during earthquakes
  • The static and seismic stability of natural and excavated slopes


Source: Geotechnical Engineering | Civil and Environmental Engineering at Illinois

Geotechnical Engineering Illinois

How to Go About Burying 16,000-Ton Tunnel Segments Under a River

How to Go About Burying 16,000-Ton Tunnel Segments Under a River

Throughout the summer, six large barge-like vessels floated out of Baltimore’s harbor. These weren’t boats, they were giant concrete tubes, destined for a tunnel in Southern Virginia that will expand a busy subterranean highway that connects two parts of the state.

This week, those tunnel segments will start to be installed under the Elizabeth River and engineering firm Skanska has released detailed information about how exactly they are burying those 16,000-ton tunnel segments below a muddy riverbed.

The Elizabeth River Tunnels is a transportation project launched in 2011 to double the capacity of the existing Midtown Tunnel, which connects the cities of Norfolk and Portsmouth, Virginia by car. It’s one of the largest infrastructure projects currently happening in the U.S. But it’s also in an extremely sensitive ecological region—the Elizabeth is the same river that’s part of a larger restoration program to clean and repair the watershed that I’ve written about before. The project needs to have as light a touch on the surrounding environment as possible.

How to Go About Burying 16,000-Ton Tunnel Segments Under a RiverExpand

Since the tunnel segments were cast in Baltimore, the first step for the journey was to transport those segments almost 220 miles away. Obviously the 350-foot-long concrete tubes were far too heavy (and inefficient) to haul via truck, so engineers used the river’s natural transportation power. The segments were closed off on one side […]

Mysterious object obstructs the world’s largest TBM in Seattle

Mysterious object obstructs the world's largest TBM in Seattle

SEATTLE — Bertha, Seattle’s tunnel-boring machine, is officially stuck.

According to a spokesperson with the Washington Department of Transportation, the giant drill hit some kind of obstruction and can’t move through it or past it.

WSDOT says the trouble started Friday when Bertha’s five-story tall cutter head felt some resistance, then stopped. WSDOT says engineers with Seattle Tunnel Partners, the company in charge of building the viaduct replacement tunnel, have been consulting with other experts to identify the obstruction – whether it’s natural or manmade.

They say Bertha wasn’t damaged in any way. They’re keeping her idle until they decide whether crews need to dig the obstruction out from above or if Bertha can charge through it.

Bertha has dug 1,000 feet of tunnel since July. She’s sitting 60-feet underground between South Jackson Street and South Main Street among a mix of native dirt and fill tossed into place from as early as the 1800s.

She has just 450 more feet to travel before leaving that fill behind. It will also mark the end of phase one in the $4 billion tunnel project that will stretch 1.7 miles from adjacent to Safeco Field to Battery Street.

WSDOT doesn’t know how long Bertha will remain stuck, but they say it’s too early to say whether the delay will affect the project’s bottom line or it’s scheduled opening in late 2015.

By |December 19th, 2013|Tunneling|0 Comments