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2013 - Caldecott Tunnel Fourth Bore project: Form Liners  

Caldecott Tunnel Fourth Bore

Caldecott Tunnel Fourth Bore
Oakland / Contra Costa County, California

Competed in 2013


Construction of the $420 million fourth bore started in January 2010. 

1929 Caldecott TunnelThe Caldecott Tunnel is a four-bore highway tunnel through the Berkeley Hills between Oakland, California and Orinda, California. The east-west tunnel is signed as a part of State Route 24 and connects Oakland to central Contra Costa County. 

Engineers wanted to match the look of the 1929 bore.   This art deco appearing façade would have required constructing an elaborate, heavy and time consuming formwork to replicate these features.   

Instead the contractors choose to use the latest state of the art, lightweight, computer-cut formwork provided by Trimtec Systems.

Trimtec Systems analyzed the project and prepared detailed engineering drawing depicting elevations and layout lines.  The drawings were so precise; they exposed a 15mm error in the original construction documents. 3D CAD files were then created in advance of programming.

Caldecott Tunnel Fourth Bore CAD 

Caldecott Tunnel Fourth Bore CAD

Caldecott Tunnel Fourth Bore CAD

These panels were then constructed off site in Columbus, Ohio and shipped to the jobsite as needed.  All forms received poly-coating to insure an easy release and smooth finish.  CNC fabricated panels held tolerances within 1/16”. 

Caldecott Tunnel Fourth Bore 

This project showcases on a large scale, how the latest technology by Trimtec can replace the traditional and costly methods of the past.

Caldecott Tunnel Fourth Bore Panels

Caldecott Tunnel Fourth Bore

Caldecott Tunnel Fourth Bore

Caldecott Tunnel Fourth Bore
Oakland / Contra Costa County, California

Competed in 2013


Construction of the $420 million fourth bore started in January 2010. 

1929 Caldecott TunnelThe Caldecott Tunnel is a four-bore highway tunnel through the Berkeley Hills between Oakland, California and Orinda, California. The east-west tunnel is signed as a part of State Route 24 and connects Oakland to central Contra Costa County. 

Engineers wanted to match the look of the 1929 bore.   This art deco appearing façade would have required constructing an elaborate, heavy and time consuming formwork to replicate these features.   

Instead the contractors choose to use the latest state of the art, lightweight, computer-cut formwork provided by Trimtec Systems.

Trimtec Systems analyzed the project and prepared detailed engineering drawing depicting elevations and layout lines.  The drawings were so precise; they exposed a 15mm error in the original construction documents. 3D CAD files were then created in advance of programming.

Caldecott Tunnel Fourth Bore CAD 

Caldecott Tunnel Fourth Bore CAD

Caldecott Tunnel Fourth Bore CAD

These panels were then constructed off site in Columbus, Ohio and shipped to the jobsite as needed.  All forms received poly-coating to insure an easy release and smooth finish.  CNC fabricated panels held tolerances within 1/16”. 

Caldecott Tunnel Fourth Bore 

This project showcases on a large scale, how the latest technology by Trimtec can replace the traditional and costly methods of the past.

Caldecott Tunnel Fourth Bore Panels

Caldecott Tunnel Fourth Bore

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Published on 05/02/2014 @ 14:08   All the posts   Top


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