tunnelling-journal (1)
tunnelling-journal (1)
  • Home
  • Print
    • Subscribe
    • Tunnelling Journal
    • Breakthrough
    • ITA Activity Report
    • A&NZ Journal
    • WTC Preview
    • Media Kit
  • Digital
    • Newsletter
    • E-Shots
    • TJ Digital edition
    • Products Page
    • Media Kit
  • Conferences
    • BTS Conference and Exhibition
    • Cutting Edge 2022
  • Buyer’s Guide
  • Events Diary
  • Jobs
  • About Us
  • Contact Us
  • Podcast

Home > BBMV JV complete first Crossrail SCL tunnels

BBMV JV complete first Crossrail SCL tunnels

Tris Thomas

Written by Tris Thomas on 10/05/2012 in News

Tagged:

Crossrail’s BBMV JV (Balfour Beatty Civil Engineering, Alpine BeMo Tunnelling, Morgan Sindall and VINCI Construction) has completed the projects’ first two sprayed concrete tunnels. The tunnels, under Finsbury Circus in the City of London, are part of the C510 contract – Early Access Shafts and Spray Concrete Lining works for Whitechapel and Liverpool Street station tunnels. The two tunnels are part of the Liverpool Street Station section. The 4.5m diameter tunnels have been built from the main access shaft within the Finsbury Circus worksite.

The two tunnels are temporary structures and will be used for compensation grouting, one of the ways that Crossrail will control any ground movements that could result from tunnelling activity.

Tubes a’ Manchette will be drilled and installed from the temporary tunnels allowing the contractor to inject grout into the ground. This will stabilise the ground and limit surface settlement.

A Sprayed Concrete Lining (SCL) technique has been used to build these tunnels. This technique involves rapidly spraying the excavated ground with concrete to stabilise it and form the permanent tunnel lining. The first SCL tunnel measures 80m in length and the second (running east from the worksite) is 100m long.

The Spray Concrete Lining technique will be used to build 12km of station platform tunnels, passages, access and grout tunnels along the Crossrail route where smaller, relatively short tunnels are needed.

Colin Niccolls, Crossrail’s Whitechapel & Liverpool Street Platform Tunnels Project Manager said: “Crossrail will primarily use two different types of tunnelling technique to build the new rail tunnels and stations. While tunnel boring machines will create the new rail tunnels, work has commenced on creating the station tunnels using mining techniques to excavate the ground which is then sprayed with shotcrete to form the tunnel linings.”

Once Crossrail works are completed at Moorgate in 2017, Finsbury Circus will be re-instated to its pre-construction condition.

Comments:

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

  1. Anthony says:
    10/05/2012 at 3:31 pm

    Is it me, or is that photo sideways…?

    Reply

Search

Digital Edition

More Like This

22/12/2022

CRCHI TBM achieves record advances in Peru

CRCHI TBM achieves record advances in Peru

December 6th saw the first CRCHI hard rock TBM exported to South America create an advance rate record of more…

28/10/2022

New link up pushes integration of machine data further

New link up pushes integration of machine data further

Digital Construction Works, a joint venture between Topcon Positioning Systems and Bentley Systems, has announced an integration between its DCW…

04/11/2022

LHDA awards Polihali Transfer Tunnel and Dam contracts

LHDA awards Polihali Transfer Tunnel and Dam contracts

The Lesotho Highlands Development Authority (LHDA) has announced the Polihali Transfer Tunnel and Polihali Dam construction contract awards, the two…

  • Contact Us
  • Media Kit
  • Magazine Archive

Newsletter

The latest from the Tunneling Journal direct to your inbox.

Social



Enquiries

TGS Media Ltd
The Old Library
Webster House
Dudley Road
Tunbridge Wells
TN1 1LE
United Kingdom

© Tunnelling Journal. All Rights Reserved. Privacy Policy / Terms & Conditions. Admin

We use cookies to ensure that we give you the best experience on our website. If you continue to use this site we will assume that you are happy with it.OkRead more