Machines, Equipments and Systems for Tunnel Construction File under: A 1.00, A 4.00, IP 4.05 1 TS 876-10 GB

Special truck-mounted concrete pumps for tunnel operation 532 m vertical High pressure concrete pumps for extreme heights and distances 3 2 Putzmeister has gone beyond the bounds of possibility time and time again by using more powerful concrete pumps and intelligent placing systems for tunnel construction. In 1994, during the construction of a hydro-power station in Northern Italy it was thus possible to achieve the world record in covering a height of 532 m with just one pump. The effective concrete pressure at that time was 18.5 MPa (2683 psi). At a construction site in Le Refrain, France,...

Tunnel formwork distributor TSV for different tunnel cross-sections 12 9 14 13 This rail-mounted hydraulically-driven placing system is recommended for continuous backfilling along tunnel formwork. World record in long-distance concrete conveying (1997): 2015 m Depending on the model flexible scissors pipes make it possible to move 12 m forwards without having to open the pipeline. The distributor is locked in the working position by hydraulically actuated clamps. Every formwork connection piece can now be reached at the exact position by the telescopic placing arm as it is moved axially. Concreting...

Clean and safe conveying of large amounts of muck by using pumps 16 19 The way Putzmeister has mastered the conveying technology for high density solids and the experience it has gained from more than 100 tunnel construction projects, make the company the right partner for complete solutions when conveying muck out of tunnels. The compact, powerful muck removal pump for extremely small tunnel cross-sections MPT 40 In addition to the extensive consultancy offered, machines such as the drive units, crushing and sorting plants, conveying belts, screens, mixing troughs, high performance pumps, silos...

Engineering for every kind of mortar injection work 28 24 Depending on rock, construction method and time plan, different machines for the injection of mortar are used in tunnel construction. Putzmeister’s programme includes everything from the smallest single machine to fill anchor holes, worm pumps for low pressure work to piston pumps for pressures up to 10 MPa (1450 psi). In combination with important accessories such as turbo mixers, high pressure valves, high pressure rotor distributors, special delivery lines, auger conveyors, flow meters, pressure gauges, etc. plants can be individually...

The wet spraying method is becoming more and more popular in tunnel construction 31 The specific benefits of the wet-spraying concreting process are demonstrated in tunnelling: less spray mist, little rebound, low energy requirements and comparatively low installation effort. ® During the wet-spraying process, the accelerator and compressed air are regulated, combined with the pumping concrete and sprayed. The upper limit for the grain size of the concrete lies at approx. 8 mm. For smaller jobs, the spray nozzle is handled manually; when high outputs are required, machines are used to help manipulation....

Towards an economical comprehensive plant – developed with a system The economic planning and timely execution of large tunnel construction projects requires the optimum combination of a variety of machines with a host of Know-How and Service components. The command of the technology for conveying concrete, mortar and high-density solids, and the precise and comprehensive knowledge of other machines and methods in tunnel construction, are available for projects with the most complicated requirements. They are put into practice leading to functional and economical solutions in co-operation with...