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Tunnel lining
and shotcrete equipment
Putzmeister AG (PM) produces a wide
range of high-pressure concrete pumps, concrete placing booms,
equipment for wet-shotcreting in tunnels and mines, and muck conveying
pumps, as well as high-density solids pumps.
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Additionally,
the German manufacturer has developed different types of delivery
line systems which are sufficiently tough to meet the incredibly
heavy loads imposed upon pipelines. Job-specific accessories such
as shut-off valves, direction valves, and rotary distributors
add versatility to the company's tunnelling equipment range.
PM
stationary concrete pumps have reached conveying heights up to
532 m and horizontal distances of 2,015 m. The pumps are designed
for an output of up to 187 cu m/h resp. maximum concrete pressure
of 260 bar.
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Click
on photographs to enlarge
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The
truck mounted concrete pump M 24-4 is especially designed for
concrete placing in low-roofed galleries and tunnels. Thanks to
its "multi-Z-folding" boom, it has an unfolding height of less
than 5 m, and a horizontal reach of 19.5 m. The PUMA is another
very flexible special tunnel concrete placing boom combined with
a truck- or trailer-mounted concrete pump. The last segment of
the PUMA boom can be swivelled 360 degrees axially, to couple
the tip of the boom to connection pieces in the side formwork. |
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For
wet shotcreting Putzmeister (PM) offers mobile spraying robots
as well as trailer-mounted units. For mobile shotcrete equipment,
Putzmeister AG and Swiss-based Sika AG entered into a strategic
global alliance in June, 2003. While Putzmeister is responsible
for production of wet shotcreting systems, Sika - a leading manufacturer
of additives for the construction industry - is to serve as the
exclusive sales agent worldwide. The new Sika-PM 500 PC shotcrete
manipulator is the first system jointly developed for tunnels.
Type 500 PC is of very compact design, and provided with the same
sturdy shotcreting boom as its predecessor, the Putzmeister type
WETKRET WKM 133. It can be additionally equipped with two admixer
tanks of 1,000 litre capacity, and with a 600 litre water tank.
For smaller tunnel sections, the shotcrete mobile type Sika-PM
400 R is available.
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The
small shotcrete pump BST 501 E is a electrically-driven compact
unit which is available as railcar, trailer or stationary model.
It features a concrete hopper with agitator, with robust steel frame
and open construction for easy servicing, and has a removable hopper
extension for easy access to wear parts. |
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Putzmeister recently introduced the very versatile concrete pump
type BSA 1002-D Multi, designed for concrete conveying as well
as for shotcrete applications. The Multi is either supplied completely
equipped ex-works as shotcrete pump, or as retrofittable normal
concrete pump. In both cases, special mounts are pre-fitted to
the machine for an additive tank, together with the connections
for a synchronously running additive metering pump.
Putzmeister muck pumps use an open
system for carrying material away from pipejacking and subway
faces, diaphragm wall excavations, roadheaders and up shafts.
For EPB and pipejacking under pressure, a closed system is available.
Delivery rates are up to 250 cu m/h over distances up to 2 km.
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Putzmeister high-density solids pumps type EKO
Twin 25300 are integrated in a TBM and use a decompression lock.
To make sure that the excess pressure of around 2 bar in the working
area does not drop whilst removing the tunnel muck, the EKO builds
up a material plug in the discharge system.
Underground
dewatering pumping systems for water and sludge have conveying
capacities to 100 cu m/h and heights of 700 m at high solids concentrations
with maximum velocity flows.
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Purpose-designed backfilling, shotcrete and concrete pumping
equipment are also supplied to mines.
Putzmeister
AG, Max-Eyth-Str 10, D-72631 Aichtal, Germany (postal address
Pf 21 52, D-72629 Aichtal, Germany), tel +49 (0)7127 599-0, fax
+49 (0)7127 599-520, e-mail pki@pmw.de,
visit www.putzmeister.de
©
tunnelbuilder ltd
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