About falling concrete fragments from Horonaigawa Bridge on the Do-O Expressway

NEXCO EAST A piece of concrete dropped on the Horonaigawa Bridge of Do-O Expressway managed by Hokkaido Regional Head Office (Atsubetsu-ku, Sapporo). There is no injury or property damage to a third party.

We immediately conduct an emergency inspection of the relevant part and confirm that there is no problem in safety. We sincerely apologize for the inconvenience and inconvenience caused to our neighbors.

1 History of discovery

At about 7:15 am on Tuesday, May 6, 2014, Tomakomai police station was contacted by a person passing by near the site that the concrete pieces had fallen, and the company was contacted there. I checked the concrete pieces.

2 Occurrence location

Horonaigawa Bridge (In-bound line) between Tomakomai West Interchange and Tomakomai East Interchange on the Do-O Expressway
A place that intersects the Tomakomai City Road Otene Road Line (In-bound S53.6KP near the opening date October 29, 1980)
Site name: Takaoka, Tomakomai City, Hokkaido (Hokkaido and Takaoka)

3 dropped concrete pieces

Maximum dimensions: approx. 8 cm x approx. 6 cm x approx. 3 cm 110 g, total weight approx. 600 g

4 Cause of damage

We are currently investigating the cause, but it is speculated that the concrete peeled off and dropped due to the corrosion of the reinforcing bars caused by the water infiltrated into the concrete and the expansion of the concrete.

5 Response status of the bridge

Due to the occurrence of an event, an emergency inspection was carried out on May 6 to confirm that there are no problems with safety.

【Location map】

[Situation photo]