seattle tunnel machine begins drilling after 2-year break

by:Gewinn     2019-09-02
SEATTLE-Seattle tunnel-
The boring machine has crossed the concrete wall that makes up the repair pit and started digging the soil about 80 feet below the street --
Level along the city\'s waterfront.
After exiting the Commission for about two years, this machine called Bertha has dug about 73 feet kilometers since it began moving again in December and installed 12 concrete tunnel rings.
On the 22nd, Chris Dixon, the project manager of the contractor\'s Seattle tunnel partner, told reporters on Thursday\'s conference call.
Things are going very well.
According to the plan, \"Dixon said.
\"The repair was successful and the performance of the machine was what we expected.
\"Building a tunnel under Seattle is the first choice to replace the Alaska Highway viaduct because it was damaged in a magnitude 2001 earthquake.
But the machine broke down at the end of 2013 and didn\'t work again until the end of 2015.
The original completion date for the new Seattle tunnel was fall 2015.
Now that the machine has been repaired and is moving again, Dickson said they will complete the tunnel phase by January 2017 and double
The Decker Road project will open to traffic in April 2018
Nearly three years late.
The reason for the Bertha collapse is controversial.
The Seattle tunnel partner and the Department of Transport of Washington state have filed competing claims with the court, so the final cost and responsibility for the delay may be resolved by the judge.
The contractor dug a concrete to repair the damage
Workers can get to and repair the front of the machine.
Once the repair is completed, the first step is to dig in and out of the pit.
Late Wednesday, Bertha completed the phase, digging at South Street near Pier 48 on Thursday.
\"We have gone through the walls and 30 to 40 feet outside the pit,\" Dixon said . \".
They will continue to dig in the native soil until the end of January to reach a safe port about 400 feet kilometres away, when they will carry out repairs.
Traffic officials plan to close the busy Alaska highway viaduct when Bertha arrives in Alaska on the 3 Th, that is, State Route 99.
Todd Trepanier, state traffic manager for the project, said
A week\'s closure will cause inconvenience to commuters, but it is necessary for officials planning to monitor the structure, \"see if anything happens because of the tunnel construction below.
Dickson says they have instruments to monitor other structures in buildings, sewers, water pipes, and underground to see if excavation can cause sinking or movement.
When asked if the Department of Transport has an emergency plan if the situation is the worst
The case scenario happened, Trepanier said, and the viaduct had to be permanently closed: \"There\'s nothing better than that.
\"The city has some plans\" about how traffic will move without a viaduct \"that are not directly linked to this,\" he said . \".
But the national transport sector did not \"anticipate\" any problems.
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