Monday, November 24, 2014

Kennedy Bridge In-Depth Inspection

A couple months ago I was down in Louisville KY to help inspect the Kennedy Bridge which carries I-65 over the Ohio River. Earlier in the year I was out at the Kennedy Bridge to inspect the floor system for Kentuckey's Transportation Cabinet (KYTC) since they wanted a detailed inspection before they decided to rehab or replace the deck and stringers. Previous Post about Kennedy Bridge floor system.
See that post for photos and details about the bridge. This inspection, much like the previous floor system inspection was done almost completely by rope access climbers. Two days were used for snooper and man-lift work on the weekend when traffic was not an issue.













 
 
 






Tuesday, September 2, 2014

Railroad Routine Bridge Inspection

The past few weeks I've been busy working long nights for bridge and tunnel inspections. Our inspections were located in Revere, South Boston and Brookline and each had its own unique access requirements.

The Revere bridge spans over the Blue Line and was inspected using ladders since it was a short span consisting of prestressed concrete butted box beams in good condition. Using ladders allowed us more time for inspection since we did not have to wait for a hi-rail lift truck to be put on and driven to the bridge. We were able to get on track around 1am and finished just before they needed power back.
The South Boston bridge spans over the Red Line and MBCR commuter rail tracks and was inspected with ladders even though it was a larger span consisting of prestressed concrete butted box beams in good condition. We decided to use ladders since we could inspect the commuter rail portion starting at 10pm and finish before the MBTA would allow us access to the Red Line around 2am. There was also a small portion over a dirt road with no traffic at 1am. Working in all three sections could not be accomplished using a hi-rail lift since the truck would require traveling further south to be able to get onto the tracks.
The Brookline bridge spans over the Green Line near the Beaconsfield Station and was inspected with a 40 foot hi-lift since the bridge was wide and consisted of 57 rolled steel beams. We were able to get on right near the bridge just after 1am and finished the wide bridge just before power was needed back.

Thursday, July 10, 2014

2014 ASCE Concrete Canoe Winner

Brings me back to the days when my team qualified with our canoe Cherry π

2014 ASCE Concrete Canoe Winner

Here are a few photos from back at school when we were placing the concrete.






Tuesday, June 17, 2014

Owensboro KY Routine and Fracture Critical Inspection


Yesterday I arrived in the balmy city of Owensboro KY to inspected the Glover H. Cary Bridge. The carries Indiana 161 and Kentucky 2262 over the Ohio River. Today we began our inspection of the truss starting at node 0. By the end of Day 1 we reached node 20 on the upper chord with two teams and node 24 on the downstream lower chord. With a high temperature of 93 degrees we were spent and my right hand had begun to cramp up. The truss makes great use of solar panels for powering the lighting, which were not on during inspection hours for safety. All of our climbers are now SPRAT certified and we are looking forward to many more climbing projects coming up at the end of the summer.

Here is a taste of the climbing that I caught with my GoPro














Here is the bridges information from Wikipedia:
The Glover H. Cary Bridge is a continuous truss bridge that spans the Ohio River between Owensboro, Kentucky and Spencer County, Indiana. It was named for the late U.S. Congressman Glover H. Cary (1885–1936), and opened to traffic in September 1940. It was originally a toll bridge, but tolls were discontinued in 1954.

The bridge was funded through a $1.03 million federal grant, part of President Franklin D. Roosevelt's New Deal program, and public fundraising efforts. At first, the bridge connected Kentucky Highway 75 to Indiana Highway 75; in 1954, Kentucky 75 was redesignated U.S. Highway 431 and Indiana 75 became U.S. Highway 231.

The bridge was closed temporarily for a day and a half the weekend of March 13, 2011, due to the need for emergency repairs to the bridge deck with traffic temporarily detoured over the William H. Natcher Bridge. Following that emergency repair, transportation officials pressed ahead with planning and design on a full-depth deck rehab that was already scheduled for bidding in April 2011.


Structural condition:
Following the collapse of the I-35W bridge in Minneapolis, Minnesota in August 2007, Kentucky officials (including Governor Ernie Fletcher) sought to reassure motorists that Kentucky's bridges are safe by conducting a special safety review of all long-span bridges at that time. The Cary Bridge was subject to a detailed biennial inspection in August 2008. Kentucky and Indiana highway officials conducted a joint walk-through inspection of the structure on September 22, 2008.

On July 5, 2011, the Kentucky Transportation Cabinet closed the bridge to all traffic for a $3 million partial rehab of the bridge deck after a large hole developed in the concrete driving surface. Hall Contracting of Louisville was the prime contractor on the 3-month project. The project, which saw 40% of the bridge's deck replaced, was completed and the bridge reopened to traffic on September 30, 2011—three days prior to the October 3 deadline imposed by KYTC on the contra

Prior to its reopening, the bridge was opened to pedestrians and bicyclists for "Bridge Day" on Sept. 30; thousands of visitors crossed the 72-year-old span between the hours of 8:00 AM and 6:00 PM, when crews began preparing to reopen the bridge to auto traffic, which occurred at 6:30 PM.