Contractors World

The UK and Ireland's only FREE to READ digital publication for construction, demolition, mining and quarrying industries

Contractors World UK & Ireland
2012 Vol 2 No 6   
Forward: Print Page Register (free) Bookmark Page

cw cw cw cw cw Buyers Guide cw cw cw

contractors world magazines on facebookContractors World magazines onTwitter
Facebook Twitter

Contractors World UK
Read more news in the
Contractors World





• back issues
•  brochures

Contractors World - Eco Friendly publishing
Sponsor a tree
by planting
your logo
in our
virtual forest
to aid the

Lighthouse Club
Benevolent Fund

previous page   PAGE 12 of 38    next page

Minimum time to demolish a 1,400 tonne bridge over the M1 - page 2 of 2

The bridge demolished is at the top of the picture, following completion of a new, wider bridge.This included resurfacing the MSA slip roads, removing lighting columns between Junctions 12 and 13, erecting two gantries and additional gantry signage elsewhere, laying permanent road markings between Junctions 12 and 13 and making central reserve barrier improvements.

The bridge demolished is at the top of the picture, following completion of a new, wider bridge.

Along with the bridge demolition, testing of the managed motorway technology and opening and closing the hard shoulder for traffic continued between junctions 10 and 11, with the section fully operational by mid-July. The technology has resulted in a hard shoulder assigned as available to traffic at busy periods to give additional capacity. Work on the remaining sections between Junctions 11 and 13 continues.

Using the hard shoulder removes the requirement for widening, as it provides additional capacity through use of the hard shoulder. Currently used only on the M42 and M6 in the West Midlands, the M1 will employ it under the direction of the Highways Agency East Region Control Centre when required.

This is the same technique used to demolish the Catthorpe viaduct at J19 of the M1 in January this year. Proven method used

This is the same technique used to demolish the Catthorpe viaduct at J19 of the M1 in January this year. The reinforced concrete bridge, which carries the old A5120 over the M1 has not been used since a new bridge opened in May.

The demolition contractors, Armac Group, were required to use as much equipment as they could get on to the site in order to meet the short time demands. Cat excavators worked alongside Komatsu and Volvo machines equipped with a variety of hammers, shears and buckets. Cat articulated dump trucks were used primarily to haul material off site for recycling.

Water misters were used to control dust, and 150 mm timber matting was laid beneath the drop zone plus and additional 10 m either side to protect the carriageway.

The bridge decking was removed first followed by the central piers and then the abutments. Working under lights, the task progressed throughout the night with additional work beginning as soon as was practical and safe to complete the project as quickly as possible.

Demolition was necessary to make way for new slip roads at Junction 12, as part of the M1 J10 to J13 managed motorway scheme.

With the bridge demolished, worked quickly progressed to installing barriers and other installations.Highways Agency project manager Lynne Stinson said: “Work on the managed motorway scheme progressed very well and we’re delighted the first phase was completed this summer, and that we’re on target for full scheme completion in spring 2013.

“Demolishing the bridge at Junction 12 was a big engineering feat, and the only way that we could remove it safely and quickly is by closing the motorway.

With the bridge demolished, worked quickly progressed to installing barriers and other installations.

“The closure unavoidably caused some disruption for road users, but to keep it to a minimum we timed the works for a 16 hour period at the weekend when traffic flow is at its lowest.”

The bridge was designed by Sir Owen Williams and Partners and built in 1959 by John Laing plc. It was 17 metres wide and 41 metres long. [CWMAGS]

Tweet this page




previous page   PAGE 12 of 38   next page

red divide
CW Contractors World - the digital publication for construction industry

Contractors World Magazines are published by VVV Limited
©VVV Ltd 2012 All Rights Reserved

Publisher: Roger Lindley
Content compiled and edited by:
Roger Lindley MCIM

Page updated: August 2012



Contractors World -International
Contractors World International up-to-date information on news, plant and equipment from around the world.


Contractros World - Australia
Australia News
Online Buyers Guide of Construction, Quarrying

Contractors World - Eco Friendly publishingBy reading this page on line you are helping to save trees.
Trees saved up to August 2012 > 814
See our virtual forest

The monthly magazine Contractors World - UK & Ireland is proud to promote and support the Lighthouse Club Please give generously. Contractors World Support the Lighthouse Club

CML House
7 Bell Mead
Herts CM21 9ES
Tel: +44 1279 600598

Contractors World is many publications in one - construction news for latest information (read our daily news pages) and a site equipment magazine featuring site reports from around the world and reviews of construction plant and equipment as it is introduced.

Written specifically for earthmovers, quarry managers, plant hire executives, and others with an interest in the construction and related industries. Contractors World are today, the world leading e-magazines for the construction industry - redefiining publishing for the digital age

Registered Office: 54 Sun Street, Waltham Abbey, Essex EN9 1EJ, UK
Registered as a company in England and Wales, number 3892263

Contractors World and Contractors World - UK & Ireland Edition are independent publications published for CWMAGS Limited by VVV Ltd.

The mention of companies and/or products within the editorial pages or in advertisements does not infer any endorsement by the publisher or editors. All editorial is freely given, without conditions and at the sole discretion of the editor. Opinions expressed by contributors are not necessarily those of the publishers. Other than saving and distributing in complete page formats, copying, reproduction, decoding or disassembly of content or computer code by any means of any part of the publication is prohibited unless prior approval is provided by CWMAGS Ltd in writing and confirmation received of agreement with any terms and conditions applicable. PDF version may be downloaded for personal use but no content may be used for promotional purposes or copied to web sites. All images and video content are subject to copyrights.