The Future Of Railway Construction

With increasing passenger numbers putting more pressure on the rail network, the need to minimise disruption to passengers during engineering works is paramount. Works that can be safely carried out without disrupting train services offer a realistic and cost-effective alternative to track possessions.

Modernisation of communications, signalling and power can require new Under Track Crossings (UTX) for associated cabling. Trenchless Technology is the optimum solution for installing new UTX’s whilst rail operations continue normally. Trenchless technology is also the most efficient method for installing, upgrading or rehabilitating trackside drainage.

The wide range of trenchless techniques give rail engineers many benefits. Pipes and cable ducts can be installed under live rail without affecting train operations. Additionally, pipe cleaning, rehabilitation and repair projects can also be carried out with little or no impact on train operations.

There are several trenchless techniques for the installation of Under Track Crossings;

Optically (or laser) guided auger boring is the best solution for installing pipes and cables ducts when accuracy and surface movement restrictions are critical and trackside access is limited. Accuracy tolerances of +/- 40mm in a 50 metre shot are routinely achieved. Vitally important is the ability to achieve +/- 3mm settlement at rail level which negates long term track settlement.

If there is sufficient trackside access available, then the trenchless technique directional drilling provides an accurate and cost-effective method for installing pipes and ducts under live rail. The shallow arc profile of the installed pipe makes it suitable for cables and pressurised water mains but not suitable for gravity sewers. Accuracy tolerances of =/-100mm can be achieved.

Shaft sinking is another trenchless method used for the installation of Under Track Crossings. Engineers construct access shafts to install new sewer connections. The shafts can be sheet pile, timber frame, concrete bolted ring or caisson type. Concrete shafts are usually converted to manholes after works have been completed.

For more information about Trenchless Technology methods used for the rail industry, contact Perco Engineering Services LTD on 0 1604 590200