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Sprayed concrete tunnel linings

Sprayed concrete tunnel linings Sprayed concrete is used to provide temporary support for tunnels through weak rock, stabilising the rock by filling crack and openings. It also seals the surface, preventing water ingress. Sprayed concrete is also used in the New Austrian Tunnelling Method (NATM) to provide temporary support in soft or weak ground.

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Tunnel lining systems-Sprayed concrete (shotcrete)

Sprayed concrete or shotcrete concrete is a concrete that sprayed using a pneumatic hose under high pressure. The hose will be projected and directed to the surface, concrete will be applied at high speed and compacted instantly. Sprayed concrete or shotcrete is effective as a lining for tunnels due to the following reasons:

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Sprayed tunnel linings: a comparison between several

2009-7-29  In the case of sprayed tunnel lining, steel fibres are directly added in the mixer, when a wet-mix is adopted [ 10, 11 ]; the thixotropy required to stick at the tunnelling faces has been deeply investigated in order to minimize the strength reduction due to accelerating admixtures [

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Crossrail project: use of sprayed concrete tunnel linings on

2017-4-11  Sprayed concrete lining tunnels are typically constructed by excavating the ground in short advances and progressively applying sprayed concrete to support the ground. The sprayed concrete linings of the Elizabeth line typically incorporate steel fibres in the mix to enhance the tensile capacity and ensure ductile behaviour in the concrete.

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Tunnel lining design - Sprayed Concrete Linings Course

2015-7-7  Crossrail project: use of sprayed concrete tunnel linings on London’s Elizabeth line Authors: Coughlan Donal , Diez Rosa , Comins John , Stärk Alfred Source: Proceedings of the Institution of Civil Engineers - Civil Engineering, Volume 170, Issue 5 , 1 May 2017 (39–46)

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(PDF) Sprayed tunnel linings: A comparison between

2009-11-1  In tunnel construction the use of sprayed concrete coupled with steel mesh or added with steel fibres for temporary and permanent linings is a well known and used solution.

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Use of sprayed concrete tunnel linings on London’s

2019-11-25  sprayed concrete to support the ground. The sprayed concrete linings of the Elizabeth line typically incorporate steel fibres in the mix to enhance the tensile capacity and ensure ductile behaviour in the concrete. Crossrail project: use of sprayed concrete tunnel linings on London’s Elizabeth line 1 Donal Coughlan BE, MEngSc, CEng, MIEI ...

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Where Are We Now with Sprayed Concrete Lining in

2021-12-21  for the use of permanent sprayed concrete with a variety of waterproofing solutions through its involvement as designers on major projects in the UK—in particular, soft ground tunneling, where the profile of the ground can be cut quite smoothly. The design solutions have ranged from permanent sprayed concrete, sprayed onto a sheet

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Permanent Sprayed Concrete Linings - ITA Activities

2020-10-29  PSCL can be used for primary linings, secondary linings or both. Using PSCLs can lead to lower capital costs, operational costs and carbon footprints when compared to traditional lining solutions. Wider adoption of PSCLs will have a positive impact on the sustainability of underground spaces and increase their viability and potential uses.

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Design of Sprayed Concrete Linings in Soft Ground─ A

2014-3-11  Publication Date: 03/11/2014 Abstract Sprayed concrete lined (SCL) tunnelling has seen rapid development over the last twenty years in the UK. The purpose of this paper is to give an update on the latest design philosophies and methodologies, and to discuss the future development trends for SCL tunnelling in soft ground.

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Crossrail project: use of sprayed concrete tunnel linings on

2017-4-11  This paper discusses the use of sprayed concrete linings on the Crossrail project to deliver the Elizabeth east–west railway line across London. It describes how sprayed concrete linings have been successfully used, leading to significant programme and cost savings to the project. Sprayed concrete linings have been used to form complex station tunnel geometries,

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Permanent sprayed concrete tunnel linings waterproofed

Final tunnel linings based on sprayed concrete and a spray-applied waterproofing membrane was initially developed as a response to excessive technical solutions for such as cast-in-place

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(PDF) Sprayed tunnel linings: A comparison

2009-11-1  Abstract and Figures. In tunnel construction the use of sprayed concrete coupled with steel mesh or added with steel fibres for temporary and permanent linings is a well known and used solution ...

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Use of sprayed concrete tunnel linings on London’s

2019-11-25  sprayed concrete to support the ground. The sprayed concrete linings of the Elizabeth line typically incorporate steel fibres in the mix to enhance the tensile capacity and ensure ductile behaviour in the concrete. Crossrail project: use of sprayed concrete tunnel linings on London’s Elizabeth line 1 Donal Coughlan BE, MEngSc, CEng, MIEI ...

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Where Are We Now with Sprayed Concrete Lining in

2021-12-21  for the use of permanent sprayed concrete with a variety of waterproofing solutions through its involvement as designers on major projects in the UK—in particular, soft ground tunneling, where the profile of the ground can be cut quite smoothly. The design solutions have ranged from permanent sprayed concrete, sprayed onto a sheet

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MSFRS tunnel linings - application example Adfil synthetic

Typical end-uses of shotcrete include sprayed concrete tunnel linings. Following several tunnel fires in Europe, design engineers have had their minds firmly focused on how to prevent explosive spalling of concrete in tunnels. The phenomenon occurs when concrete is exposed to high temperatures such as those experienced during a hydrocarbon fire.

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Tunnel Linings - Tunnel Engineering - Shotcrete

2022-7-21  Tunnel linings are the support system of a tunnel or shaft. Tunnel lining can be temporary, primary or permanent, and constructed from steel and concrete in many forms. ... Shotcrete is a wet mixed concrete that is sprayed

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Design of sprayed concrete lining in soft ground

2013-5-17  Sprayed concrete lined (SCL) tunnel has seen rapid development over the last twenty years in the UK (Su, 2013).Three of these developments have been the inclusion of wet-mix sprayed concrete ...

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Numerical analysis and capacity evaluation of composite

2018-6-1  Introduction. Historically, sprayed concrete lined (SCL) tunnels were usually designed so that the primary lining takes all short-term loads and then degrades to “gray rock” in the long term ().The secondary lining was assumed to take all long-term loads, with no load sharing between sacrificial primary and permanent secondary linings.

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Interpretation of tangential and radial pressure cells in and

2021-10-1  1. Introduction. Clayton, van der Berg, Heymann, Bica, and Hope (2002) studied the performance of pressure cells in sprayed concrete linings, focusing mainly on laboratory tests and numerical modeling to improve understanding of cell action factor, temperature sensitivity, crimping and installation effects. This paper builds on and refines the interpretation of cell

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Sprayed Concrete Lining Tunnelling Terra Solutions

The sprayed concrete supports the excavation both temporarily and permanently. 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 ...

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Permanent sprayed concrete tunnel linings waterproofed

Final tunnel linings based on sprayed concrete and a spray-applied waterproofing membrane was initially developed as a response to excessive technical solutions for such as cast-in-place

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Permanent sprayed concrete tunnel linings, waterproofed

2022-6-24  The tunnel lining is a bonded multi-layered structure, shown in Fig. 2. Field testing shows that the membrane bonds to the sprayed concrete substrate with tensile bonding strengths higher than 0.5 ...

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Sprayed Concrete Lined Tunnels Alun Thomas Taylor

2019-9-4  Sprayed concrete lined (SCL) tunnels are growing rapidly in popularity due to their versatility. The design and construction of both hard rock and soft ground tunnels has been revolutionised by the advent of the SCL method and now the use of permanent sprayed concrete linings has unlocked the true potential of the method to minimise construction costs and times.

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Sprayed Concrete Linings (NATM) for Tunnels in Soft Ground

Sprayed Concrete Linings (NATM) for Tunnels in Soft Ground. Thomas Telford, 1996 - Gunite - 88 pages. 1 Review. This guide considers the implications of the use of sprayed concrete support methods in soft ground in urban areas and provides guidance on how the associated risks of this method can be minimised. More ».

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Tunnel lining design - Sprayed Concrete Linings Course

2015-7-7  Crossrail project: use of sprayed concrete tunnel linings on London’s Elizabeth line Authors: Coughlan Donal , Diez Rosa , Comins John , Stärk Alfred Source: Proceedings of the Institution of Civil Engineers - Civil Engineering, Volume 170, Issue 5 , 1 May 2017 (39–46)

Inquire now

Use of sprayed concrete tunnel linings on London’s

2019-11-25  sprayed concrete to support the ground. The sprayed concrete linings of the Elizabeth line typically incorporate steel fibres in the mix to enhance the tensile capacity and ensure ductile behaviour in the concrete. Crossrail project: use of sprayed concrete tunnel linings on London’s Elizabeth line 1 Donal Coughlan BE, MEngSc, CEng, MIEI ...

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Shotcrete - Gunite - Sprayed Concrete Linings - Fibo

Sprayed Tunnel Linings. Sprayed concrete is a construction technique that sprays concrete into place instead of pouring it into moulds. There are two methods one uses a dry mix and the other a wet mix. The dry mix method is usually called gunite and was developed in 1895. The dry mix is pumped to the nozzle using compressed air, where a finely ...

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Permanent Sprayed Concrete Linings - ITA Activities

2020-10-29  Permanent Sprayed Concrete Linings. Featured. The main objective of this guideline is to give infrastructure owners and their advisors the confidence to incorporate permanent sprayed concrete linings (PSCL) into their underground space design. In line with the objectives of the ITA Statutes this document aims to encourage the use of tunnels and ...

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Comparison Between Sprayed and Cast In-Situ

2016-8-31  These tunnels were all excavated and supported with a sprayed concrete primary lining. The secondary linings at Bond Street and Farringdon were constructed using different methods. Bond Street had a sprayed

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