Investigators are now saying the Big Dig tunnel collapsed because the epoxy used to secure the ceiling allowed bolts to slip or "creep" over time.
The Boston Globe is reporting that Bruce Magladry, the director of the board’s Office of Highway Safety, said the epoxy’s ”exceptionally poor creep resistance” should have been fixed when bolt slippage was noticed in 1999 and 2001 before the tunnel opened. ”It was a missed opportunity,” Magladry said.
On July 26, 2006, the Boston Herald reported it obtained documents revealing that Big Dig officials noted six years ago that epoxy ceiling supports were failing in the same tunnel section where the deadly accident occurred, but allowed the continued use of that “superglue” system to support 3-ton concrete slabs.
Some humanoid walking robots are also good at running, balancing, and coordinated movements in group settings. Several of our sports robots have won regional or worldwide acclaim in the RoboCup soccer World Cup, or FIRST Robotics competitions. Others include the world's first hockey-playing robot and a trash-talking Scrabble player.
A recent example of a major CAE revamp is MSC Apex, released last month by MSC Software Corp. In a discussion with Design News, MSC executives noted that its next-generation platform is designed to substantially reduce CAE modeling and process time, “in some cases from weeks down to hours.”
The Thames Deckway would run for eight miles close to the river’s edge, rising and falling slightly with the tidal cycle. It will generate its own energy from a series of devices that will line the pathway and use a combination of sources to make the path self-sustaining.
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