• Microtunneling method statement

     · The jacking frame pushes both of the concrete pipe and the MT machine, and pipe after pipe will be pushed until the machine reaches the receiving shaft. 4 Monitoring of the excavation coordinates. The position of the tunnelling machine is monitored with the assistance of a guidance system called Electronic Laser System "ELS", below are the description of how this system works;

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  • MasterRoc SWA 710

    Bentonite slurry modifiion in case of high soil porosity or saline water conditions. Improving the yield and filter cake properties of bentonite and filler slurries. Lubricant for pipe jacking. ADVANTAGES Structuring the soil, particularly effective in, coarse, clean sands and gravels below groundwater

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  • Excavation failure during microtunneling in fine sands: A ...

    Technical note Excavation failure during microtunneling in fine sands: A case study J. Jebellia,1, Meguidb,*, Sedghinejadc a 12th Floor, 455 ReneLévesque West Blvd. SNCLavalin International, Montreal, QC, Canada bCivil Engineering and Applied Mechanics, McGill University, 817 Sherbrooke Street West, Montreal, Quebec, Canada H3A 2K6 cLoshan Manufacturing, Suite 10, 1496 Valiasr ...

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  • Pipe Jacking

    Appliion Applicable for installation of gas, water, cable, sewer, surface water channels in manentry diameters up to 3 m or more over lengths limited only by the ground conditions and by the designed jacking pipe strengths and pipe string design. Pipe jacking is suitable for ground conditions from soft but selfsupporting soils to rock.

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  • New Installations

    2 3 Pipe Jacking Oldest method of trenchless technology Appliions Larger Diameter Pipe (1050 mm and up) Lengths can range from 3 to over 200m 4 Pipe Jacking Person entry Pipe diameters greater than 900 mm (36") Difficult to work in excavations of this size Practically limited to dia. greater than or equal to 1075 mm (42") Pipe installation process occurs from

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  • Bentonites and additives

    For slurry tunnel boring machines, CONDAT offers different additives for treatment of bentonite muds according to the geology encountered and the required characteristics. The separation treatment plant may need: unclogging polymers. polymers for mud contaminated by cement or silie. polymers to reduce the use of lime in the press filter.

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  • Revised Method for Estimating Microtunnelling Jacking ...

    Revised Method for Estimating Microtunnel Jacking Forces Authors: Alex Burnett,, ... Microtunnelling is a growing construction method in North America with a wide array of appliions for water and ... manual delivery lubriion systems injected bentonite slurry through ports loed on the top of the jacked pipe to ...

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  • PIPE JACKING

    This ringbeam and lagging tunnel shows the underside of a conveyor as spoils are transported PIPE JACKING EXCAVATOR SHIEL For 96168 in. (2,4384,267 mm) OD tunneling and pipe jacking appliions, Akkerman Excavator Shields are a proven partner. Excavator Shields differ from the Tunnel Boring Machine (TBM) in that they do not have a cutter ...

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  • MTS Jack and Bore Design Criteria Note

    soil. The bentonite slurry shall seal the annular space between the casing and the excavated soil with a minimum return of 95%. 2. Jacking and receiving pits shall be fenced on all sides and secured in compliance with OSHA requirements. 3. All jack and bore .

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  • Construction Methods Machines — City Rail Link

    In civil engineering appliions bentonite is used as a mineral hydraulic barrier in diaphragm walls, foundations, tunnelling, horizontal directional drilling and pipe jacking. Bentonite slurry walls (also known as diaphragm walls) are used in construction, where the slurry wall is a trench filled with a thick mixture of bentonite and water.

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  • Appliions

    Bentonite in civil engineering appliions is traditionally used as a thixotropic, support and lubricant agent in diaphragm walls and foundations, in tunneling, in horizontal directional drilling (HDD) and pipe jacking.

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  • Recycling Industrial Minerals

    Bentonite in civil engineering appliions is traditionally used as a thixotropic, support and lubricant agent in diaphragm walls and foundations, in tunnelling, in horizontal directional drilling (HDD) and pipe jacking. Bentonite, due to its viscosity and plasticity, is also used in Portland cement and mortars.

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  • Chapter 14

    Chapter 14 Trenchless Construction Section 14A1 General Information 4 Revised: 2013 Edition Jacking Shield: A fabried steel cylinder from within which the excavation is carried out either by hand or machine. Incorporated within the shield are facilities to allow it to be adjusted to control line

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  • PIPE JACKING

    PIPE JACKING 5000 SERIES II PUMP UN The 5000 Series II Pump Unit is part of a complete, allinone pipe jacking system for the Tunnel Boring Machine (TBM) and contains a hydraulic power unit, skid base sections and thrust versatile system easily adapts to any jacking pipe in any length with an appropriately sized TBM and yoke.

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  • Microtunnelling and pipejacking

    Description. Microtunnel boring machines and pipejacking are used to bore tunnels of small diameter and over quite short distances . The precast concrete rings are pushed from the startup shaft and the thrust force is passed on by intermediate stations. CONDAT offers a complete range of specific products and lubricants for microtunnel ...

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  • An introduction to pipe jacking and microtunnelling

    ring, mounted on the jacking rig, is used to transfer the loads. The jacks are interconnected hydraulically to ensure that the thrust from each is the same. The number of jacks used may vary because of the pipe size, the strength of the jacking pipes, the length to be installed and the anticipated frictional resistance.

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  • Bentonite

    Bentonite is subsequently dried (air and/or forced drying) to reach a moisture content of approximately 15%. According to the final appliion, bentonite is either sieved (granular form) or milled (into powder and superfine powder form). For special Bentonite appliions, bentonite is purified by removing the

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  • Swell Gel (Bentonite)

    Swell Gel (Bentonite) appliions: Construction and Civil Engineering: Bentonite in civil engineering appliions is used traditionally as a thixotropic, support and lubricant agent in diaphragm walls and foundations, in tunnelling, in horizontal directional drilling and pipe jacking. ? Bentonite, due to its viscosity and plasticity, also is ...

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  • Pipe Jacking and Utility Tunnelling

    Pipe Jacking Utility Tunnelling. Pipe Jacking Utility Tunnelling can be synonymous, depending on the appliion. Both processes involve a manned tunnel excavation. Although hand tunnelling is often viewed as archaic, it is a very effective way of creating an accurate bore.

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