22/04/2008

The Induction Heating In-place Removing technology(IHIR)

In order to introduce the Induction Heating In-place Removing technology, a test construction was performed on the test field located in Narashino City, Chiba Prefecture. The test construction attracted the attention of more than 60 visitors and was successfully completed.

< Removal of asphalt mixture >

 

During recent years, due to the increase of traffic volume of heavy vehicles and also the increased size of vehicles, fatigue damage was reported in various parts of bridges. This was especially prevalent regarding steel plate deck bridges. Various fatigue damages such as crack fissures developing in the deck plate become obvious. Effective actions are required in accordance with the knowledge about which parts are damaged, when damage started to appear and conditions of the construction sites.
In order to prolong the longevity of existing bridges and also to supply healthy services for transportation, numerous maintenance and repair works have been conducted. However, the noise generatd from the construction when the asphalt pavement is removed from the steel plate deck becomes an issue.
Due to these circumstances, the Induction Heating In-place Removeing Technology (IHIR) has been developed jointly together with Green ARM, Takenaka Corporation and Takenaka Road. (This system is currently awaiting patent pendeing approval.)