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FiberReinforced Sprayed Concrete as a Permanent Tunnel Lining

FiberReinforced Sprayed Concrete as a Permanent Tunnel Lining

Fiber-Reinforced Sprayed Concrete as a Permanent Tunnel ...

Jun 10, 2020  Abstract. Until recently, when sprayed concrete was accelerated by silicates, whether non-reinforced or reinforced by welded mesh, it was logically considered as

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Fiber-Reinforced Sprayed Concrete as a Permanent Tunnel Lining

Download Citation Fiber-Reinforced Sprayed Concrete as a Permanent Tunnel Lining Until recently, when sprayed concrete was accelerated by silicates, whether

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Tunnel Lining Fiber Reinforced Concrete Solutions ABC ...

Tunnel Lining. The use of fiber reinforced concrete is growing rapidly in tunnel lining applications. In this industry, shotcrete is applied to help stabilize

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Composite Shell Lining for Tunnels and Mined Stations

The final concrete lining of the tunnel de Viret, part of the metro line M2 in Lausanne, Switzerland, was designed based on the composite shell lining approach

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Tunnel Lining Design and Construction

Tunnel Lining Design and Construction Verya Nasri, PhD, PE ... Strength Serviceability Durability Plain concrete versus reinforced concrete Fiber versus

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Where Are We Now with Sprayed Concrete Lining in Tunnels?

The primary lining is designed as a sprayed concrete lining containing structural fiber rein-forcement. The structural fibers are to increase the ductility

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Where Are We Now with Sprayed Concrete Lining in Tunnels?

The primary lining is designed as a sprayed concrete lining containing structural fiber rein-forcement. The structural fibers are to increase the ductility of the concrete and provide toughness and post-crack resistance in the long term (see Reinforcement section). Conventional bar rein-forcement is only required at openings and some headwalls.

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Tunnel Lining Design and Construction

Tunnel Lining Design and Construction Verya Nasri, PhD, PE ... Strength Serviceability Durability Plain concrete versus reinforced concrete Fiber versus rebar Spray on concrete versus CIP concrete Cast-in-Place Final Lining. Final Tunnel Linings Liner Geometry ... Sprayed on Waterproofing Membrane. New York City’s Second Avenue Subway 72. nd.

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Performance of Macro Synthetic Fiber Reinforced Tunnel

EPC Elasto Plastic Concrete . ABSTRACT Macro synthetic fiber reinforced concrete or shotcrete is seen by many design engineers as offering a viable alternative to steel reinforcement in tunnel linings. The technology is now commonplace for primary and permanent ground support in both mining and civil tunnel applications.

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Reinforcement optimization of fiber reinforced concrete ...

Mar 01, 2014  The “Turina” road tunnel, which is part of the infrastructures of a 3.5 km long road project, is taken as a reference case study herein.The road section is 13 m wide and is made of two 3.75 m lanes, a hard shoulder (1.50 m wide) and a wide curb for each lane (1.25 m wide).The “Turina” tunnel is 665 m long, with an internal diameter of 12.6 m (Fig. 1a) and it is excavated by means of ...

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Effect of fiber reinforced concrete on shrinkage crack of ...

Tunnel permanent lining has various functions such as improvement of serviceability, uncertain conditions during and after construction and expectation of mechanical capacity. Some phenomena like spalling concrete debris from lining have occurred in Japan recently, not resulting from mechanical reason. Both mechanical and non-mechanical function should be satisfied simultaneously to design ...

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(PDF) Permanent support for tunnels using NMT

When fibre reinforced shotcrete, S(fr), and rock bolts form the key components of permanent rock reinforcement and tunnel support and are not followed by concrete lining, then the investigation ...

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Reinforcement of sprayed concrete for the Mining Industry ...

Sprayed concrete linings are generally reinforced to absorb tensile stresses, which arise from bending moments in the lining, and to avoid cracking, as well as to provide safety for underground personnel during the works. Reinforcement of sprayed concrete linings may be achieved by means of welded wire fabric (mesh), reinforcing bars (including lattice girders or steel sets) and/or fibers.

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Sprayed Concrete Lining Tunnelling Terra Solutions

Common methods of sprayed concrete lining (SCL) tunnels (in softer conditions) comprise a temporary primary lining of sprayed concrete, with a sheet membrane or sprayed sealant, followed by construction of a permanent cast in-situ concrete lining, usually reinforced with steel bars. The tunnel can only remain unsupported for a limited time and ...

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Loads on Sprayed Waterproof Tunnel Linings in Jointed Hard ...

Nov 10, 2013  Permanent Tunnel Linings with Sprayed Concrete and Bonded Membrane. The sprayed concrete and bonded membrane method for tunnel linings utilizes fiber-reinforced sprayed concrete as the structural part of the tunnel lining and a bonded membrane as the waterproofing part. Hence, the inner drainage shield structure would become unnecessary.

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Sprayed concrete tunnel linings

In all cases the tunnel can only remain unsupported for a limited time and hence a permanent, load-bearing lining (either concrete cast in situ or precast concrete units) will be required However, in some countries, particularly Scandinavia, but increasingly elsewhere, fibre-reinforced sprayed concrete (FRS) is used to provide both the ...

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(PDF) A Review on Application of Shotcrete in Tunnel ...

CASE STUDY OF HONGKONG TUNNEL WORKS prevailing on site, the quantity can only be roughly A. Introduction estimated: Rebound with dry sprayed concrete 20 % to 30 % for application vertically upward Rebound with wet At present, there are over 380km of bored tunnels in Hong sprayed concrete 5 % to 15 % for application vertically Kong, 59km in ...

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(PDF) Repair and Strengthening of Underground Structures

Dec 09, 2009  Tunnel lining structures ... applications on sprayed FRPC are summarized in engineering at home and abroad. ... and increases the flexural capacity of concrete beams. Glass fiber reinforced ...

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COST EFFICIENT WATERPROOF TUNNEL LININGS

Cost of fiber reinforced shotcrete, $/m of tunnel 2233 2909 Cost of CIP concrete lining, $/m 2694 Cost of CIP formwork, $/m 535 Cost of installed membrane, $/m 677 693 Total cost of permanent lining including membrane 6138 3601 The simple observation to make is that the shotcrete lining

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Waterproofing - UGC

The spray-applied membrane facilitates the construction of monolithic, single-shell tunnel linings using permanent sprayed concrete. Recent projects adopting this approach have shown signifi cant project savings over the double-shell method. BASF can assist you with this design concept. MasterSeal 345 in combination with sprayed

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Fiber-reinforced projected concrete for tunnel application ...

Steel fiber reinforced concrete is stronger, more ductile and less permeable than traditional concrete. In tunnels excavated using modern automated TBM (Tunneling Boring Machine) excavators, the lining of voussoirs (precast concrete) can also be used as a final coating and is one of the fastest growing applications today.

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Reinforcement optimization of fiber reinforced concrete ...

Mar 01, 2014  The “Turina” road tunnel, which is part of the infrastructures of a 3.5 km long road project, is taken as a reference case study herein.The road section is 13 m wide and is made of two 3.75 m lanes, a hard shoulder (1.50 m wide) and a wide curb for each lane (1.25 m wide).The “Turina” tunnel is 665 m long, with an internal diameter of 12.6 m (Fig. 1a) and it is excavated by means of ...

get price

Sprayed concrete tunnel linings

In all cases the tunnel can only remain unsupported for a limited time and hence a permanent, load-bearing lining (either concrete cast in situ or precast concrete units) will be required However, in some countries, particularly Scandinavia, but increasingly elsewhere, fibre-reinforced sprayed concrete (FRS) is used to provide both the ...

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Sprayed Concrete - BuildSite

As a consequence of the growing use of sprayed concrete as a permanent construction material for tunnel linings, demands on its durability have increased likewise. It offers more flexibility in terms of the geometry and space requirements. Permanent sprayed concrete is a requirement for the innovative composite shell lining design (see page 8).

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SFRC - Steel Fiber Reinforced Concrete

One of sub activity groups of the ITATECH, the industry group within the International Tunnelling and Underground Space Association (ITA), is in charge to prepare a new guideline: “Fibre-Reinforced Concrete Precast Segments for tunnel lining application – Guideline for good practice of Fibre Reinforced Concrete Precast Segments”; a draft version is under revision and will be presented soon.

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F - Main glossary - About Tunnelling - ITA-AITES

Fibers for reinforcing concrete or shotcrete (sprayed concrete) are defined as short, discrete length of steel, glass, carbon, or synthetics, with any of several cross sections. They are sufficiently small to be randomly dispersed in an unhardened concret. ... (or with only minimal) roof support, and the permanent lining can be constructed ...

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Waterproofing - UGC

The spray-applied membrane facilitates the construction of monolithic, single-shell tunnel linings using permanent sprayed concrete. Recent projects adopting this approach have shown signifi cant project savings over the double-shell method. BASF can assist you with this design concept. MasterSeal 345 in combination with sprayed

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Karl Gunnar Holter innmat - stalprotect

used as a permanent lining solution for road and rail tunnels in hard rock under the following conditions: Low to moderate ground water pressures up to approximately 700 kPa in the host rock mass Fiber reinforced sprayed concrete material with certain material and surface properties

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Application of Single Pass Tunnel Lining with Steel Fibre ...

Apr 26, 2012  The ventilation shaft of Mount Motian tunnel is an inclined shaft with a dip angle of 24°21'48". Investigations were conducted to evaluate the feasibility of applying single pass tunnel lining (SPTL) of steel fibre reinforced shotcrete (SFRS) to the ventilation shaft as a permanent lining.

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COST EFFICIENT WATERPROOF TUNNEL LININGS

Cost of fiber reinforced shotcrete, $/m of tunnel 2233 2909 Cost of CIP concrete lining, $/m 2694 Cost of CIP formwork, $/m 535 Cost of installed membrane, $/m 677 693 Total cost of permanent lining including membrane 6138 3601 The simple observation to make is that the shotcrete lining

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Tunnel and Culvert Shotcrete Linings CCP Shotcrete + Pumping

CCP is your placement contractor for shotcrete tunnel linings. Our scope of work includes the providing of all shotcrete equipment, a skilled shotcrete crew and/or concrete ready mix material. We are experienced in placing shotcrete to a prepared surface of anchor bolts and mesh reinforcement, or with the utilization of fiber reinforced ...

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Shotcrete - Low Slump Concrete with Fibers for Tunnel Lining

REED C50SS Shotcrete Pump is shown here shotcreting a stiff shotcrete mix with fibers. A separate chemical dosing pump is used to add accelerator to the nozz...

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Fiber Reinforced Concrete - Barzin Mobasher

Introduction to Fiber Reinforced Concrete Fiber-reinforced concrete (FRC) is extensively used as primary or secondary reinforcement in infrastructure projects. Recent advancements in serviceability-based design methods have allowed the adoption of FRC since we can now design for a specific deflection, crack width, stiffness, or load capacity level.

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CiteSeerX — Effect of Fiber Reinforced Concrete on ...

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Tunnel permanent lining has various functions such as improvement of serviceability, uncertain conditions during and after construction and expectation of mechanical capacity. Some phenomena like spalling concrete debris from lining have occurred in Japan recently, not resulting from mechanical reason.

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