Shenzhen used excavator for sale

  • Construction Accidents - SAFTENG

    May 02, 2019 · The collapse of the crawler crane occurred around 9:40 a.m. on the 500 block of Northeast Second Avenue where a five-story apartment building is being built. It was not immediately known what caused the accident, which involved a 135-foot tall tower and a 150-ton crane with a 140-foot-long boom, or luffing jib. A sign on the crane said Sims Crane.

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  • Rolling Bearings and Services for Mining and Processing

    Tunnel boring machines are used for road construction, heading and for installing supply lines. The dimensions of these machines can be enormous. Low-friction and reliable rolling bearing systems are required for cutter heads with diameters up to 20 meters. The challenge Hard rock, loose rock or wet soil place high demands on

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  • Sany Port Machinery Factory, Custom Sany Port Machinery

    Excavator, Crawler Excavator, Road Roller, Grader Blade, Bulldozer : 99% New Second Hand Easy Operation 5.2 Tons Crawler Tunnel Excavator Machine Sy55c. Unit Price: US $ 15000-20000 / Set Sinotruck 6X4 & 8*4 Telescopic Straight Boom Cargo Crane Truck 14tons.

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  • Tunnellers Dictionary - LBA

    Top heading: A small tunnel dug ahead of the main excavation, at the crown of the tunnel. Top headings are used in the top-heading-and-bench method, the advantages being smaller excavation and early support to minimise settlement, or that engineer can use the heading tunnel to gauge the stability of the rock before moving forward with the project.

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  • Waggershauser Tunnel: Crawler Excavator with Great Reach

    Jan 01, 2020 · With its extra-long boom and a reach of 18 m, the Cat crawler excavator 326F SLR is a key machine at the Waggershauser Tunnel. Credit/Quelle: Caterpillar/Zeppelin. The B31 is one of the main roads with the heaviest traffic in the …

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  • Liebherr Annual Report 2020: Beyond the horizon - Liebherr

    Covering an area of 160 metres by 160 metres, the dry dock provides ample space for large freighters such as the MV Kaami and all the cranes, material handling equipment, crawler excavators, wheel loaders, lorries, and other vehicles needed for a meticulously planned and safe dismantling, sorting and removal process – while at the same time

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  • New Boom for compact Radius Excavator 328D LCR - tunnel

    Mar 01, 2009 · A tunnel excavator must take advantage of constricted space and in the process usually fulfil rigorous work for a good 24 h without a break. Generally this machine is subjected to particular strain, something that has to do with the confined conditions as well as the geology of the prevailing rock. In Böblingen a new boom has been developed for the basic unit of the compact radius excavator CAT …

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  • Diggers, Dozers and all your plant news

    11 November 2021 Excavators Available as short, long and narrow or long and wide track models Doosan has launched the company's first 21 tonne crawler excavators – the new DX210-7, DX210NLC-7 and DX210LC-7 models, offering a choice of short, long and narrow or long and wide track configurations, respectively. The new DX210-7 short track model is ideal for use on soft ground surfaces where

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  • Planning & Construction of Hydro Projects, OCT, 08

    Construction Equipments S. No. Equipment and Capacity 1 2 3 2-Boom hydraulic Drill Jumbo Hydraulic Excavator, 2.0 cum Hydraulic Excavator, 0.9 cum Hydraulic excavator CK 90 or equivalent Hydraulic excavator CK 75 or equivalent Crawler / Wagon Drill Crawler Drill LM100 or Eq Heavy Duty Rock Drill, 120 cfm (with Rear Dumper 18T, 4x4 Rear Dumper

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  • Construction of the Seikan undersea tunnel—I. General

    Jan 01, 1986 · Yoahloka section service tunnel Tappi section main tunnel section 9 Location used Equipment name Load header Boom header Mitsui Miike Manufacturer machinery machinery Alpine Type MRH-S40 MRH-S90 AM-50 Height (m) 1.92 2.32 2.195 Width (m) 2.80 5.13 1.91 3.2* Length (m) 11.63 14.11 7.965 Weight (t) 17.5 40 24 Height of excavation (m) 4.1 5.2 4.42

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  • Challenges and changes: Tunnelling activities in Japan

    Apr 01, 1995 · Hourly excavation capac/ty in various strengths of ground for the Boom header Model RH-IOJ, a large-model variable-cross-section tunnel excavator. Ground Strength (MPa) Excavation Capacity (mS/hr) 150 100 50 4.5-2.3 17.0-8.6 55.2-33.8 By performing excavation and muck- loading simultaneously, the machine contributes to labor savings and im

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  • US5112161A - Method for excavating and constructing

    An equipment for excavating and constructing straight or circular continuous monolithic structural walls, comprises a motor driven vehicle provided with a support structure for substaining a beam which is orientable about a vertical and horizontal axis, a slide on one side of the beam, an excavator mounted onto the slide and comprising a chain that is substantially vertical in an operative

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  • Construction methods and equipments - SlideShare

    Apr 13, 2017 · Tunnel diameters can range from a 1 meter to 19.25 meters to date. 21.List out the advantages of tunnel boring machines. There is very less danger of fall outs in machine bored tunnels, since adjacent or surrounding rocks are undistributed as no blasting is done. Mucking is also safe and convenient, since muck is conveyed from the face to the

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  • EP0269172A2 - Rotary rock and trench-cutting saw - Google

    A rotary trench cutting or rock milling saw (12) unit is supported on a head (18) for movement about two mutually perpendicular axes (50,62). The head is adapted for pivotal mouting on a backhoe boom (20) or similar positioning structure. Rotary rock cutting wheels are driven by a hydraulic motor and a support vehicle (24) for the saw unit includes a hydrostatic drive system with a variable

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  • Tunnelling Terms - rail system

    It can be expanded into the final tunnel cross section, for example for the Uetliberg tunnel in Switzerland a 5.00 m pilot tunnel was excavated with a tunnel boring machine and then enlarged to the final cross-section of 14.20m wide by 14.40m high by a tunnel bore extender (TBE) employing undercutting.

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  • eCFR :: 29 CFR Part 1926 -- Safety and Health Regulations

    Minimum performance criteria for rollover protective structures for designated scrapers, loaders, dozers, graders, crawler tractors, compactors, and rubber-tired skid steer equipment. § 1926.1002: Protective frames (roll-over protective structures, known as ROPS) for wheel-type agricultural and industrial tractors used in construction. § 1926

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  • Multifunctional Machine for - tunnel-online.info

    Crawler Excavator with Circular Boom for Pilot Headings 60 days of construction time was planned for the pilot heading. The breakthrough took place after only 53 days.

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  • Underground Mine Development - MINING.COM

    Dec 01, 2011 · The Robodrills, made near Lyon in France, feature Montabert HC 110 HF (high-frequency) hydraulic drills capable of 3.5-3.8 m/min drilling speeds on the three-boom rigs and HC 108 drills on the

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  • Tunnelling and Underground Construction Technology

    Top heading and bench •Extension arm or boom •Muck conveyor •Crawler chassis •Loading apron. 2015.03.20 42 Tunnelling and Underground Construction Technology Tunnel Reaming and Enlarge Machines Reaming boring machine bores the final section from an axial pilot tunnel from which it pulls itself forward by means of a gripper unit.

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  • Challenges and changes: Tunnelling activities in Japan

    Apr 01, 1995 · Hourly excavation capac/ty in various strengths of ground for the Boom header Model RH-IOJ, a large-model variable-cross-section tunnel excavator. Ground Strength (MPa) Excavation Capacity (mS/hr) 150 100 50 4.5-2.3 17.0-8.6 55.2-33.8 By performing excavation and muck- loading simultaneously, the machine contributes to labor savings and im

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