Segmental and Sprayed Concrete Lining
Single-pass linings are rapidly gaining favour and can now be achieved to a high standard of construction and finish using precast segmental, or sprayed concrete.
Sprayed concrete is the only method of tunnel lining support that forms an immediate and intimate bond with the strata that interacts actively with the ground surface instead of passively requiring the ground to move before it begins to resist that movement. There is a strong move towards the wet mix process that delivers high, consistent production and is suited to robotic systems. However, the dry mix system is still popular for low volume work and does not have the problems associated with transporting and storing wet concrete. The current innovations are in the use of robotics, non-caustic accelerators and special additives, and the incorporation of steel and plastic fibres. Consequently, the finished sprayed concrete lining product is equivalent in strength, impermeability and durability to conventional cast in place concrete, and is often better in terms of compaction.
Associated Polymer Services Ltd
Geotechnical and Tunnelling Supplies
Associated Polymer Services Ltd is a modern company specialising in the manufacture and supply of equipment and materials to the geotechnical and tunnelling industry. Product range: tubes-a-manchette in both steel and plastic; pneumatic/manual packers; polyurethane hydrophilic and hydrophobic resins and pumps; inflatable tunnel/shaft seals and rubber entrance/exit portal seals and portal eye fabrication; conveyor belts; flexible hoses for air/slurry/grout; TBM slurry hoses; grooved and shouldered victaulic pipe, clamps and fittings; gate/ball valves; specialist TBM slurry valves; black iron pipe fittings; three start/BSP threaded non return valves; and cast-in inserts.
Associated Polymer Services Limited, Don Valley Court, Oakes Green, Sheffield, South Yorkshire S9 3WR, UK, tel +44 (0)114 244 79169, fax +44 (0)114 242 6613, e-mail aps1@compuserve.com
N.V. Bekaert SA
Steel Fibre Reinforcement and Dosing Equipment
Bekaert manufactures the popular range of Dramix® cold drawn wire steel fibres. The fibres are available in different lengths (30, 35, 40, 50 and 60 mm) and in different performance classes (45, 65 and 80) according to the application. Dramix can be used with traditional dry and wet shotcreting equipment, materials and additives. Dramix® fibres are glued together in bundles by water-soluble glue. The bundles separate easily into single fibres and guarantee a homogeneous distribution in the concrete mix. A more recent innovation has been the use of Dramix in precast segmental linings; the Dramix is batched into the concrete via the specialised dosing equipment that will be displayed at UC2001. The equipment is supplied by Incite AB of Sweden, who have over 130 units operating worldwide.
The typical fibre design has been developed and improved after years of research and over 30 years of experience. An optimal balance has been created between shape, tensile strength and L/D ratio, and the carefully designed hooked ends provide optimal anchorage in the concrete. Both companies operate worldwide, and provide advice on lining design and installation to their customers. Both have been involved in many major tunnelling projects, and can rightly claim to be the foremost innovators in the steel fibre reinforcement industry. Their products and original inventions are being widely emulated. Bekaert publishes an excellent 230-page illustrated reference text entitled "Tunnelling the World", currently being revised, that describes recent developments in shotcrete, tunnel technology and equipment with particular reference to steel fibre reinforcement.
N.V. Bekaert SA, Bekaertstraat 2, B 8550 Zwevegem, Belgium, tel +32 56 766986, fax +32 56 767950, or visit www.bekaert.com
CETCO Europe Ltd
Waterproofing
Few projects are as complex and demanding as the construction of below ground transportation systems, where tunnels, terminals, and other underground structures are used by millions of people every day. All over the world, engineers and architects have specified CETCO waterproofing products for these important projects. When high performance is a must, the world turns to CETCO.
CETCO waterproofing products use the natural mineral sodium Bentonite. When wetted, unconfined Bentonite can swell up to15 times its dry volume. When confined in below ground waterproofing applications, Bentonite forms an impervious membrane and can seal cracks, punctures and small voids after installation. CETCO's Voltex membrane can self-heal concrete cracks caused by shrinkage or seismic action.
CETCO Europe Ltd, Birch House, Scotts Quay, Birkenhead, Merseyside CH41 1FB, UK, tel +44 (0)151 606 5900, fax +44 (0)151 606 5949, e-mail info@cetco.co.uk or visit www.cetco.com
Buchan Concrete Solutions Limited
Batching Plants and Segmental Linings
Buchan offers precast concrete solutions for both underground and above-ground projects. Computer controlled batching plants and distribution systems are employed to meet the most stringent requirements, and a wide range of concrete products is manufactured, either to customers' specifications or as standard items. These include all types of tunnel and shaft linings and steel-banded jacking pipes and standard bolted tunnel and shaft linings are supplied in a wide range of sizes up to 35m i.d. A comprehensive range of smoothbore tunnel and shaft linings is available, including six-segment trapezoidal rings for use behind the latest TBMs. The firm has also developed, in conjunction with Dunlop Precision Rubber Ltd., 'Bucseal', a hydrophilic rubber gasket system that provides superior expansion in seawater compared to most proprietary water swelling compounds. The complementary product 'Buclock' is a plastic joint connector system that is compatible with both hydrophilic rubber and EPDM compression gaskets, and is supplied in a range of pull-outs from 15kN to 60kN. Buclock provides a positive shear and tensile connection in all tunnelling environments, and the speed of fixing significantly reduces building times and eliminates circle bolts and pockets.
Kings Lane, Byley, Middlewich Cheshire, CW10 9NB, United Kingdom. Tel +44 (0)1606 843517 Fax +44 (0)1606 842215 or visit www.cvbuchan.co.uk
Delta Membrane Systems Ltd
Cavity Drainage Membranes
Delta Membranes are the UK's largest supplier of cavity drainage membranes to the refurbishment, civils, and construction industry. The Delta brand is synonymous with quality. Their membranes cover a wide range of applications, and have been used on many projects such as the Channel Tunnel, Athens Metro, Barcelona Metro, and the refurbishment of many London Underground stations. Delta membranes provide water management solutions, and can be used in all types of construction, existing or new. The products meet many approvals worldwide, not least, BBA certification in the U.K. Contact Brian Davison or Chris Burbridge.
Delta Membrane Systems Ltd, Unit 5, Bassett Business Centre, Hurricane Way, North Weald, Epping, Essex CM6 6AA, UK, tel +44 (0)1992 523811, fax +44 (0)1992 524046, e-mail delta500@ukf.net or visit www.deltamembranes.co.uk
Fibrin (Humberside) Ltd
Polypropylene Fibres
Fibrin is Europe's leading manufacturer of patented polypropylene fibres. These products are available globally through our network of distributors.
Fibrin products have been proven to be beneficial in reducing explosive spalling in concrete exposed to fire. As a result we have been successful in having our product excepted in some sections of the Channel Tunnel Rail Link, currently contracts 410 and 320.
Other tunnel project references include sections of Heathrow T5, Elstree Cable Tunnel, National Grid - Kentish Town, and Humbercare Sewage Tunnel, Hull.
Whether in-situ, precast or sprayed concrete, there is a place for Fibrin's polypropylene fibres.
Fibrin (Humberside) Ltd, Borwick Drive, Grovehill, Beverley, East Yorkshire HU17 0HQ, UK, tel +44 (0)1482 863777, fax +44 (0)1482 872800, e-mail info@fibrinuk.co.uk or visit www.adfil.co.uk
Grace Construction Products Ltd
Monofilament Synthetic Fibres
Grace Structural Fibres (GSF) are a new patented high tenacity, synthetic fibre reinforcement designed to provide enhanced structural properties to concrete and shotcrete. Unlike conventional fibrillated and monofilament synthetic fibres which are added to concrete for the control of plastic shrinkage cracking, GSF are used in concrete and shotcrete to improve material properties, including toughness (post-crack energy absorption), impact and fatigue resistance. GSF are 50 mm-long monofilament synthetic fibres manufactured from a unique polymer blend. This unique blend of polymers, and the manner in which they are manufactured, enables the monofilament fiber to partially fibrillate during mixing, thereby increasing the bond between the fibre and concrete matrix. This results in enhanced toughness, impact and fatigue resistance and control of plastic shrinkage cracking, with a minimal impact on concrete workability and ease of placement.
Grace Structural Fibres may be used in a variety of ready mix, precast and shotcrete applications, including tunnel linings, slope stabilisation, channel linings and pools.
The utilisation of GSF will eliminate the need for welded wire fabric in most applications. GSF can be used competitively in direct replacement of the best commercially-available steel fibres.
Grace Construction Products Ltd, 852 Birchwood Boulevard, Birchwood, Warrington WA3 7QZ, Cheshire, UK, tel +44 (0)1925 824824, fax +44 (0)1925 824033 or visit www.graceconstruction.com
Incite AB
Steel Fibre Dosing Systems
Incite AB, a Swedish mechanical engineering company is now a world leader in steel fibre dosing systems. Incite's operations encompass sales, product development, manufacturing and service in the field of steel fibre dosing technology. Our selected customers are found worldwide, and are reached through direct sales and via various partners. Our competence is in the area of refining processes through steel fibre dosing technology. Hundreds of installations and complex technical challenges have given us experience to set the standard in this field. Our purpose is to create continual improvements in productivity for our customers. Standard products that we produce and adapt to our customers' needs, fixed prices, guaranteed delivery times and 24-hour service will result in increased profitability for our customers. In order to realise our business concept of achieving market leadership, we expect the same level of ambition from our employees and suppliers as our customers expect from Incite. For more information, please contact us.
Incite AB, Box 178, S-301 05 Halmstad, Sweden, tel +46(0)35-218500, fax +46(0)35-218510, e-mail info@incite.se or visit www.incite.se
MBT Underground Construction Group
Sprayed Concrete and Injection Products
The MBT Underground Construction Group has supplied technical solutions to hundreds of projects, from major tunnel contracts to extensive mining operations worldwide. With headquarters in Switzerland, it has global representation to meet customers' needs. The UK division is integrated into the UK business unit via the Manchester office, with a dedicated team providing expertise, advice and support for products and systems in the following areas: sprayed concrete equipment; TBM products; ground stabilisation injection; and the mining sector
MBT is now part of Degussa Construction Chemicals, a subsidiary of Degussa, one of the world's leading chemical companies. The group employs 63,000 people in over 100 countries world-wide.
MBT Underground Construction Group, Marketing Department, tel +44 (0)161 794 7411, fax +44 (0)161 727 8881, e-mail ross.dimmock@mbt.com or richard.foord@mbt.com or visit www.mbt-ugc.com
Oxford Hydrotechnics Ltd
Resin Injection and Grouting
Oxford Hydrotechnics is an innovative company, specialising in advanced resin injection & grouting techniques. With over 30 years experience, complex projects undertaken include: controlling sea water inundation halting a TBM drive; consolidating waterlogged gravel below a first century wall; sealing shafts constructed through running sands; sealing sea water ingress through defective concrete; sealing substantial hydrostatic head in partially collapsed ground; sealing very high water flows through fractured rock; consolidating mobile ground, forming thrust blocks for pipe jacking; consolidating & sealing incompetent ground at shaft breakout eyes; sealing leaks under 20 m of water; stabilising river gravel, permitting hand mining; and underwater resin injection using trained divers.
Oxford Hydrotechnics Ltd, Unit 2, Baynards Green Farm, Baynards Green, Oxon OX27 7SR, UK, tel +44 (0)1869 346001, fax +44 (0)1869 345455, e-mail info@oxford-hydrotechnics.co.uk
or visit www.oxfordhydrotechnics.co.uk
Ludwig F Piatnik
Cladding and Linings
Ludwig F Piatnik handles design, manufacture and installation of internal and external integrated cladding, tunnel inner lining, fire barrier, sound absorption and signage systems for metros and railways (both stations and rolling stock) road tunnels, airports, office buildings and hospitals.
Ludwig F Piatnik Ges.m.b.H, Mittersteig 13, 3rd Floor, A-1040 Vienna, Austria, tel +43 1 581 95 00 0, fax +43 1 581 95 00 10, e-mail piatnik@tbn.at
Quickseal Specialist Contractors Ltd
Specialist Concrete Repair and Protection
Quickseal has expanded to become one of the leading companies specialising in the repair, strengthening and protection of reinforced concrete structures.
Of particular relevance to work in the underground environment, the company provides the following services: sprayed concrete to construct or line shafts and tunnels and to provide facings to diaphragm walls; waterproof renders to seal damp or leaking basements; and Railfix systems to minimise vibration and thereby reduce structural deterioration.
In the United Kingdom, Quickseal is the contracting partner of the Swiss company, Rascor. Together they design and implement both remedial and new-build solutions to waterproofing problems. Their techniques are based upon the pressure injection of aqua-reactive flexible modified acrylic materials into existing cracks or special carrier channels.
Quickseal Specialist Contractors Ltd, The Manor House, 50 Chigwell Road, South Woodford, London E18 1LS, UK, tel +44 (0)20 8530 6808, fax +44 (0)20 8530 7254, e-mail enquiries@quickseal.co.uk or visit www.quickseal.co.uk
Rascor AG
Waterproofing and Grouting Technology
Rascor is a highly specialised company operating in the fields of waterproofing, grouting technology and building/structure preservation and repair. Based in Switzerland, the company develops and produces its own systems, products and machines for the above applications. The foundation stone for the group was laid in 1965 by René P. Schmid, who still heads the company. It is now represented by its own branches and subsidiaries in a number of European, South American, Asian and Arabian countries, ensuring on-the-spot support for all local partners.
Among Rascor's major assets is its tremendous wealth of knowledge and expertise, underpinned by a powerful, efficient global network capable of tackling the most challenging and prestigious of international projects. Recent successes have developed on the effective use of the patent to speed up the construction of tunnels and basements by up to 25% by the employment of RASCOtec re-injectable crack inducers and the White Tank System RASCOR where a 10 year guarantee can be provided against water ingress.
Rascor AG, Wehntalerstrasse 11, CH-8165 Oberweningen, Switzerland, tel +41 1857 1111, fax +41 1857 1100, e-mail martin.smith@rascor.com or visit www.rascor.com
Romtech Ltd
Welded Steel Cages and Rockbolts
Romtech produces MIG welded cages for precast segmental tunnel linings. They are designed to suit the particular requirements of each manufacturer and are assembled from their 'Supermat' range of machine-manufactured fabrics and/or loose rebar. The company provides fast production on purpose-made jigs for speed and simplicity of placing on site, or at the precast factory. The cages are manufactured from ribbed type 2 (grade 460) reinforcement to BS4449 and/or BS4482 to a dimensional accuracy to +/- 5mm tolerance, or better where specified for prefabricated units. The entire manufacturing process is quality assured to BS EN ISO 9002, and all welding is carried out in accordance with BS7123 and BS5135, with welding personnel and their prefabrication facility CARES approved. Romtech is part of the ROM group, and has dedicated factories throughout the UK with a national and export distribution network. Full technical assistance is provided, and the firm has a proven track record on numerous major tunnelling projects, including the Channel Tunnel and, currently, the Copenhagen Metro. Major UK clients include Charcon. A wide range of accessory items that includes concrete plastic and wire spacers and hydrophilic joint sealants complements the product range. The company is set to expand worldwide, and is already active in the Asia-Pacific region.
Romtech also manufactures and supplies a complete range of rockbolts using standard Grade 460 Type 2 rebar, cut and threaded to the client's specifications. The bolts are supplied in a wide range of diameters from 10 to 50 mm, and are supplied complete with faceplate (flat or domed), washer (plain or hemispherical) and tensioning nut. Galvanised and epoxy coated rockbolts can also be supplied on request. The firm also manufactures a wide range of tunnelling related steel fabricated products such as weld mesh, lattice girders and segment cages. All ROM products are CARES approved and manufactured to BS EN ISO 9002.
Romtech Ltd, Wheaton Road, Witham, Essex CM8 3BU, UK, tel +44 (0)1376 53320, fax +44 (0)1376 533227, e-mail nick_blaney@rom.co.uk or visit www.rom.co.uk
Tam - De Neef Ltd
Leak Sealing Experts
Tam - De Neef Ltd was founded by Thomas A M Robbins. Tam - De Neef Limited, in Moreton Pinkney, UK, manufacture and supply leak-sealing products to stop water ingress in any below ground or any water retaining civil engineering structure. An experienced technical support team can advise on products and methods of application. The company approved specialist contractors are trained and highly experienced in resin injection techniques to stop active water leaks, and repair cracks in concrete. Most products are approved by WRAS to the standard BS 6920 : 1996, for use with potable water. Gelacryl 2000 complies with the London Underground Ltd Engineering Standard E1042 A3; Fire Safety Performance of Materials.
Tam - De Neef, Fox Barn, Banbury Road, Moreton Pinkney, Northants NN11 3SQ, UK, tel +44 (0)1295 760992, fax +44 (0)1295 760998, e-mail enquiries@tam-deneef.co.uk
Webac Chemie GmbH
Polyurethane and Epoxy Injection Resins
Webac is a German company with branches and representations in numerous countries around the world, including the USA, Brazil, Egypt, UAE, Singapore, and throughout Europe. Being a specialist manufacturer of polyurethane and epoxy injection resins for over 20 years, Webac has one of the widest and most comprehensive ranges for waterproofing and concrete repair. Webac Systems are manufactured to a consistent high quality standard, which reflects in excellent products and application properties. Consequently they are used extensively worldwide, and in many tunnelling projects. Webac Systems also include Polyacrylate Gels, fully approved for use for curtain injection by German Railways, products for soil stabilisation, and other special materials, such as epoxy repair mortars, that can be applied even underwater.
Webac Chemie GmbH, Fahrenberg 22, D-22885 Barsbüttel, Hamburg, Germany, tel +49 (0)40 670 570, fax +49 (0)40 670 3227, e-mail info@webac.de or visit www.webac.de
Weldgrip
Strata & Ground Control
Weldgrip manufactures and supplies the following products for the civil engineering, tunnelling and mining industries: Fibregrip® and Gripforce® rockbolts and soil nails; Gopher and Turmag pneumatic drilling machines; drill steels and bits; gabions and welded mesh systems; and grout pumps.
Located in a purpose built factory in South Yorkshire, UK, Weldgrip provides a first class and responsive service throughout the UK and overseas.
As well as a major involvement in mining industries worldwide, Weldgrip products have played critical roles in prestigious civil engineering projects including the Barcelona to Madrid High Speed Rail Link, Edinburgh and Conway Castle stabilisation projects, Channel Tunnel, Athens and Paris Metros, and the Jubilee Line Extension in London.
Weldgrip, Whaley Road, Barnsley, South Yorkshire S75 1HT, UK, tel +44 (0) 1226 283438, fax +44 (0) 1226 731563, e-mail tech@weldgrip.com or visit www.weldgrip.com
