Channel Tunnel Rail Link - Rail Link Engineering

Southdowns staff began working with RLE in 1997 at the early stage of detailed design.

Part of a multi-disciplinary environmental team, the in-house noise and vibration team had a wide range of activities and responsibilities including:

  • Reviewing and advising engineers on the Project's noise and vibration commitments.
  • Advising design teams and project engineers on specific mitigation measures to achieve commitments;
  • Liaison and negotiation with external parties (statutory bodies, Local Authorities etc), on detailed proposals submitted for planning purposes;
  • Detailed operational noise modelling of route to establish detailed noise barrier requirements and costs;
  • Detailed design of bespoke noise barriers and absorptive panels for surface and elevated sections of high speed line;
  • Development of technical specifications for the performance of resilient track systems for vibration and groundborne noise mitigation;
  • Development of tender documentation (inc. specifications) for the main construction contracts for the project;
  • Tender evaluation and technical interviews with tenderers;
  • Presentation of technical material to senior management on critical acoustical considerations and risks for project;
  • Training for RLE, Union Railways and Contractors on specific noise and vibration related issues;
  • Development of management system for Section 61 consents process across all contractors;
  • Auditing and site inspections to ensure compliance with the Project's Environmental Management Systems;
  • Value Engineering workshops on noise barrier designs, mitigation of structure radiated noise and groundborne noise and vibration;
  • Managing the detailed FE analysis of structure radiated railway noise within the proposed station areas of the new terminus at St Pancras;
  • Detailed modelling of aerodynamic noise from ventilation shafts due to the operation of ventilation equipment and passage of high speed trains;

Project management of numerous other acoustic testing and modelling programmes including:

  • Measurements on in-line ventilation shaft components for aerodynamically induced re-radiated noise (laboratory);
  • Dynamic stiffness testing of various resilient components for track form mitigation (laboratory);
  • Scale acoustic modelling of forced ventilation equipment within tunnels (laboratory);
  • Rheostatic braking noise profiles for Eurostar trains (field);
  • Testing of noise barrier and absorptive panel designs (laboratory); and
  • FE analysis of structure radiated noise from large elevated structures to assist in track form design.