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 7
Forward: Print Page Register (free) Bookmark Page

cw cw cw cw cw Buyers Guide cw cw cw

Contractors World UK
More news in the
Contractors World - International issue


BREAKING NEWS


LIBRARIES

• back issues
•  brochures
• 
videos


Contractors World - Eco Friendly publishing
Sponsor a tree
by planting
your logo
in our web site info@cwmags.com

previous page   PAGE 14 of 36    next page

Massive support props for massive basement excavation

Massive support props for massive basement excavation

Groundforce has recently supplied 10 large hydraulic props incorporating their wireless load monitoring system, - including six of their largest 500 tonne capacity MP500 Super Struts - to support a basement excavation for 3 Merchant Square, part of a multi-million mixed-use development just off the Edgware Road at Paddington in West London.

The 9 m deep basement excavation is located just a few metres away from Paddington Basin on the Grand Union Canal and is lined with a combination of steel sheet piles and a secant piled wall.

Poor ground conditions and the close proximity of the canal mean that significant and variable lateral forces are imposed on the piled retaining wall. To ensure stability, groundworks contractor PJ Carey cast a heavy capping beam over the piles and specified Groundforce struts for structural support.

Four knee-braces comprising 150 tonne working load capacity MP150 struts are used to support one end of the excavation; at the other, support is unnecessary as an existing concrete retaining wall provides stability.

Most of the lateral support is required across the width of the huge excavation which is more than 100 m long and 49 m wide for most of this length. Support here is supplied by the five MP500 Super Struts located at the point of highest calculated load.

“The loadings are not consistent or evenly distributed so at this point we have had to use our largest strut to ensure stability,” says Mark Whitmore, technical sales manager with Groundforce.

All 10 of the struts are braced against the capping beam, which has specially designed steel corbels cast into it, to accept the connectors at the ends of the MP150 and MP500 struts.

The equipment was chosen primarily to maximise the amount for working space inside the excavation so that the contractor could cast the basement slab and begin construction of the central core without undue interference due to supporting steelwork.

“The MP500 struts employ our 1220 mm diameter Super Tube extensions which give them the strength and rigidity to span the 49 m width without intermediate support,”Biggest struts reduce number required

“The MP500 struts employ our 1220 mm diameter Super Tube extensions which give them the strength and rigidity to span the 49 m width without intermediate support,” said Mr Whitmore.

“Using our biggest struts also allowed us to minimise the number of supports required.”

continued >>>

Tweet this page


 

 

 

previous page   PAGE 14 of 36   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: September/October 2012

 

READ OUR OTHER MAGAZINES

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

CLICK HERE


Contractros World - Australia
Australia News


cmldir.com
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 September/October 2012 > 925


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


CONTRACTORS WORLD MAGAZINES
CML House
7 Bell Mead
Sawbridgeworth
Herts CM21 9ES
UK
Tel: +44 1279 600598
Email: infodesk@cwmags.com
URL: http://www.cwmags.com

Contractors World is many magazines 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 management, plant hire executives, and others with an interest in the construction and related industries.

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

Contractors World and the Contractors World - UK & Ireland Edition are independent publications published through CWMAGS 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 VVV 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.