If CA can’t build bridge, what about bullet train through mountains?

by Chris Reed | December 8, 2014 7:00 am

SF_and_Bay_BridgeIf the state of California can’t build a bridge, how can it handle the huge technological and engineering challenge of building a bullet train through two mountain ranges laced with seismic faults?

Such questions are inevitable after the latest Sacramento Bee report[1] questioning progress on the state’s current big infrastructure project:

An independent report … sharply criticized official tests of high-strength steel rods that secure the new San Francisco-Oakland Bay Bridge, concluding the analysis was flawed and that some bridge parts should be replaced.

The report said assessments by the California Department of Transportation and its expert advisers – that the bridge is safe and durable – were based on “unscientific” and “erroneous and misleading” evidence.

The critique was authored by Yun Chung, a retired metallurgical engineer who has studied the matter since some threaded rods on the eastern pier of the span snapped in March 2013. Chung said Caltrans’ test protocols, data analysis and conclusions about the reliability of the suspension span “could not be supported.”

Chung proposed replacing most of the suspect bolts and rods with others whose qualities remove vulnerability to cracking.

  1. Sacramento Bee report: http://www.sacbee.com/news/investigations/bay-bridge/article4253508.html
  2. still in use: http://www.visitnafplio.com/visitnafplio.com/Mykines/Entries/2010/3/18_Verdens_eldste_bro.html
  3. arch bridges: http://www.historyofbridges.com/facts-about-bridges/arch-bridges/
  4. [Image]: http://calwatchdog.com/wp-content/uploads/2013/10/train_wreck_num_2-203x300.jpg
  5. laid out the challenge: http://articles.latimes.com/2012/nov/12/local/la-me-bullet-mountains-20121113

Source URL: https://calwatchdog.com/2014/12/08/if-ca-cant-build-bridge-what-about-bullet-train-through-mountains/