Your browser is no longer supported

For the best possible experience using our website we recommend you upgrade to the newest version of your browser.

Your browser appears to have cookies disabled. For the best experience of Construction News, please enable cookies in your browser.

Welcome to the Construction News site. As we have relaunched, you will have to sign in once now and agree for us to use cookies, so you won't need to log in each time you visit our site.
Learn more

Water cuts damage on bridge job

PLANT

MOWLEM Civil Engineering has used remote-controlled water jet technology to cut concrete while widening a bridge deck in the Drake Circus refurbishment in Plymouth.

The hydrodemolition technique, using a hired-in Conjet 322 robot, was specified to enable removal of concrete while leaving existing reinforcement in place, ready for a cast extension to the bridge deck.

Mowlem's senior bridge engineer, Hrach Agobiani, said: 'It was a contract requirement to use hydrodemolition to avoid damage to surrounding concrete from vibration.

'It leaves an uneven, textured finished, which gives a strong bond for the concrete we cast on later.'

The contractor originally specified hand-held jetting lances but opted for the remote controlled option to eliminate risk and to raise productivity.

The plan had been to remove all the 0.5 m depth of concrete in a 30 m-long, 0.9 m-wide section but the concrete proved to be so strong it was considered necessary to remove only a 0.15 m-deep channel.

Related Jobs