Zideh Tunnel in Slovenia is the testing ground for Atlas Copco's latest Boodex system which uses an expanding drill head to install grout tubes into loose rock. In effect the system is a sophisticated forepoling technique to create a stable arch in the ground ahead and above the face of a tunnel.
The rotary bit cuts an oversize hole so that the grout tube can be advanced into the ground close behind, maintaining the drill hole in loose material and fitting within the bore where the bit passes through solid rock. Contrarotation disengages a cam within the drill head so that the cutter bit folds down and can be withdrawn through the sleeve and recovered before grout is pumped in.
Boodex hardware will be on show at Bauma along with complete rigs such as the ROC F7 heavy crawler machine for quarry work and the ROC 642 which is intended for a variety of lighter rock cutting uses in quarries or on construction sites.
It can drill horizontally as well as vertically, and with controls arranged in the seat arm rests allows the operator gets a better view of the drill holes. Hydraulic valves have been redesigned to cut down noise and hence operator fatigue says Atlas Copco.
New materials have been introduced for drill steel for which more than 30% increased life is claimed. Rods should be good for 2,000m of drilling before the risk of them being lost down a hole due to fatigue cracking.
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The Boart Longyear group will be using Bauma as a showcase to its global capability in construction products by bringing together developments from group companies in South Africa, Canada, USA, Ireland, England, Italy and Germany. Its double storey stand will be divided into five product groups covering overburden drilling, environ- mental and geotechnical, hard rock, soft rock and diamond products.
Among the innovations will be new rockdrills, a new thread form for overburden drilling, a new rod handling device and a high pressure injection drilling system, which is said to offer significant improvements in jet grouting tools.
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BSP International Foundations
BSP International Foundations' new versatile BSP 335T hydraulic drill rig marks the return to rig manufacturing after a long period providing specialist ancillary tools.
The new rig is suitable for continuous flight auger, rotary kelly and displacement pile techniques. It is also capable of installing up to 8m long casing sections and can be adapted for pile driving.
The new self erecting machine develops a torque of 250kNm at 5rpm and is capable of drilling to 60m depths and up to 1.5m diameter says the British manufacturer. When rigged for continuous flight auger work it can install 1.2m diameter piles up to 20m deep. Setting up on arrival at site including erection of the 20m mast takes less than two hours says BSP.
Amec has been working with the prototype machine since last November. The first production model will be on show at Bauma.
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Construction machinery goliath Caterpillar has made a traditon of using Bauma to remind the industry that its the world's biggest and used to hire a complete hall to make the point.
At the Neue Messe Mnchen the halls are all a standard size and larger so this time Caterpillar is having to share.
Machines on show will range from the mighty D11R dozer and 5130B mining shovel which scales 182t to a new line of relatively tiny machines bidding for a share of the mini excavator and compact wheel loader market.
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Italian concrete manufacturing and handling equipment manufacturer Cifa has doubled its stand size to celebrate its 70th year in business.
A recent innovation is a joint project with Komatsu in Japan using the Cifa Spritz wet process sprayed concrete system, which has been widely used elsewhere on major tunnelling projects.
Special modifications had to be made for the Japanese work to ensure proper mixing of powdered additives, which are preferred locally to the fluid based materials normally used.
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Ingersoll-Rand will display its new ECM690 self-contained hydraulic crawler drill. This can form boreholes of between 89 to 127mm diameter. It is fitted with the new Montabert HC150 drifter with reverse percussion and Intelsense II quad-sensing automated drilling functions.
The company has also just launched its new CE12T pick that is suitable for heavy duty applications including pile cutting, foundation breaking, hard rock tunnelling and bridge works.
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Britain's biggest equipment maker and one of Europe's largest, JCB will have more than a dozen new or enhanced models available for its now famous 'dancing digger' choreographed displays on its outside area stand.
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Hydraulic piling equipment specialist Junttan of Finland will be exhibiting the latest version of its PM 20 multi-purpose piling rig, smallest in a four model range, along with a selection of hydraulic hammers and rotary heads.
Features of the rig are long crawler tracks and a 6t counterweight which can be repositioned by up to 1.5m using hydraulic rams to balance the machine and give improved stability.
Claiming higher impact energy and blow rates than diesel hammers, Junttan will be showing its latest HHK-A hammer which is designed to generate reduced impact noise compared with previous hydraulics and be substantially quieter than an equivalent diesel.
The company says it is making substantial inroads in places where diesel powered piling hammers were once the norm. In Hong Kong the outlawing of diesels from 1 April due to their noise and dirty exhaust emissions is giving a substantial boost to hydraulic powered machines.
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Direct rock mining without the use of explosives is being promoted by Krupp Bautechnik using its Marathon series hydraulic hammers.
Advantages of eliminating blasting from the primary face at a quarry are claimed to be: a reduction of wastage since less material is reduced to fines; the ability to select material from appropriate strata; continuous production at a steady rate; and elimination of the noise and ground shocks inevitable with blasting.
New for Bauma is the HB60 hydraulic hammer drill for anchors and piling. The 750kg rotary percussive drill generates a torque of 28kNm
and runs at up to 190rpm.
Krupp GFT is launching special RZD and RZU interlock elements for its heavyweight composite piling system which allows I-section soldier piles to be clutched to Larssen sheet piles.
There is a new range of Mller vibratory pile driving and extraction equipment. Krupp
GFT is now offering design and supply service for Ishebeck Titan bored steel tube injected anchor piles.
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For 1998 Liebherr boasts a single 10,000m2 block in the open area with 74 machines on display, half of them for the first time.
Concrete plants, crawler tractors, crawler excavators, diesel engines, mining trucks, mobile cranes, rope excavators, tower cranes, truckmixers and wheeled loaders; small ones, big ones, vast ones. Liebherr makes them.
Highlights include a new tele- service radio which automatically transmits maintenance data to a predetermined service station, allowing remote diagnosis of servicing needs.
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A world record for driving steel casings is claimed by piling and geotechnical equipment manufacturer MGF of Germany.
In Hong Kong contractor Gammon Construction has driven and extracted 3.5m diameter casings to a depth of 110m in hard soil with obstructions using an MGF vibratory driver/extractor model RBH 1575 says the manufacturer. Gammon's technique for these extremely long casing involved the use of a second, oversize, sleeve which was driven to approximately half the full depth to allow a staged excavation so as to reduce friction on the deep casing.
New developments on show at Bauma 98 will include the DBA 18 hydraulic rotary piling rig which can reach depths of 60m with its five section kelly driven auger.
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The new Montabert V1200 hydraulic breaker, designed to be mounted on large excavators, is suitable for concrete demolition, trenching, secondary breaking and rock excavation. It has automatic variation of energy and frequency. It detects the hardness of material and automatically adjusts its output, especially useful in mixed ground conditions. Because only the energy required is transmitted, maintenance costs are reduced and the breaker has a longer life span.
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German drilling rig manufacturer Nordmeyer's most recent addition to the DSB range is also the smallest. The all-terrain 0/3 is only 1.3m wide but is still able to perform all standard drilling techniques, including hollow stem augering up to 350mm diameter. A heavy duty hydraulic hammer can also be added to carry out advanced window sampling. The rig can be fitted with a mud pump for straight flush drilling to around 100m depth.
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Orenstein & Koppel usually has a huge bucket from a mining shovel to entertain Bauma visitors in which they can pose and photograph each other.
This year is no exception as O&K will have on its stand the 42m3 bucket from an RH400, the world's largest hydraulic shovel. Only two have been built and the second is scheduled to join its mate in March at Syncrude Canada's oil sands operation in northern Alberta. At its final acceptance test in December the first RH400 moved an average of 9,700t of material an hour.
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Tamrock of Finland with its associated businesses Rammer and Sandvik Rock Tools will be presenting a display demon- strating equipment designed for quarrying, tunnelling and demolition.
Quarry operators are offered two additions to the Pantera range of trackdrills, the 1100 and 1500 for cutting holes up to 152mm diameter using Sandvik 60mm drill steel.
A bigger machine is the Gator self propelled crawler hydraulic rotary for drilling up to 171mm diameter and 31m depth.
Tunnellers can view the Tamrock Maxi 206-90 electro- hydraulic jumbo and the ATM 105 heavy duty roadheader. For demolition and recycling Tamrock will be showing the full range of Rammer hydraulic hammers, cutter crushers and pulverisers.
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Topcon is using Bauma to launch its green laser in Europe on its self levelling interior laser series RL-VH2 and on its latest pipe laser. The green beam is claimed to be four times more visible to the eye than an equivalent conventional red laser while not exceeding legal safety requirements for the energy of the light source.
The Touch Series 5 excavator control system is said to offer 'truly automatic' grade control for construction machinery. The operator enters the level and slope details on an in-cab screen then relies on the technology to guide the machine bucket.
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German drilling equipment manufacturer Tracto-Technik will be launching the newest rig in its steerable boring system range. The Grundodrill 20 S, is the largest and heaviest bore rig that the company has produced and is suitable for installing up to 600mm diameter pipes.
Hydraulic drilling, bentonite mixing and additional percussive hammer action are all integrated into one unit.
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American utility installation equipment manufacturer Vermeer's extensive stand will include its range of Navigator directional drilling rigs. The two smallest rigs, the D7x11a and D16x20, designed for work in urban environments offer a combination of compactness, manoeuvrability and power.
At the other end of the range, the updated D50x100a is for large diameter and long distance applications such as sewer projects and river crossings. It can handle adverse soil conditions and other hard organic material.
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