history of the sprayed concrete lining methodpart ii

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History of the sprayed concrete lining method—part II ...

Feb 01, 2003  The sprayed concrete lining method. As mentioned in Part I, the combined use of rock bolting, reinforcing nets and sprayed concrete has been ‘standard practice’ in the McIntyre Mine in Ontario, Canada, since approximately 1930 ( Keeley, 1934, Anonymous, 1957 ). Great importance was attached to systematic rock bolting.

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History of the sprayed concrete lining method—part II ...

History of the sprayed concrete lining method—part II: ... sprayed concrete and anchors has led to the ‘sprayed concrete lining’ method in the 1950s. In concluding, it is demonstrated that the so-called ‘New Austrian Tunnelling Method’ (NATM), which has been propagated since 1963, is in many respects borrowed and has created much ...

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10.1016/S0886-7798(03)00006-3 DeepDyve

Jun 11, 2020  Only gradually were steel supports, then shotcrete, followed by anchors and finally, the systematic combination of these support measures on a broad scale, introduced. 2 Rock bolting technology Our research work reveals that the history of bolting began with a patent specification (no. 302909) submitted by Stephan, Fröhlich and Klüpfel in ...

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History of the sprayed concrete lining method—part I ...

Feb 01, 2003  7. Sprayed concrete lining. The development of shotcrete technology started with the invention of the ‘cement-gun’ by the American taxidermist C.E. Akeley. He obtained a patent (No. 991 814) in 1911 for an ‘apparatus for mixing and applying plastic or adhesive materials’, which was called a

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Study on the supporting time of the secondary lining of ...

Jan 01, 2021  Study on the supporting time of the secondary lining of the highway tunnel with weak surrounding rock. Jiaqing Feng 1 ... 3 Shaanxi Key Laboratory of Safety and Durability of Concrete Structures, Xijing University, Xi'an, Shanxi ... Kalman K. 2003 History of the sprayed concrete lining method—part ii: milestones up to the 1960s Tunn. Undergr. ...

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History of the sprayed concrete lining method—part I ...

This work, which is divided into two parts, traces the fascinating history of the sprayed concrete lining method from its beginnings and shows how it developed on a broad international front in its theoretical and technological aspects. The beginning of tunnel engineering can be seen in the 1.1 km long Tronquoy Tunnel in France built in 1803.

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Tunnelling and Underground Space Technology Vol 18 ...

History of the sprayed concrete lining method—part I: milestones up to the 1960s. Kalman Kovári. Pages 57-69 Download PDF. ... Research article Full text access History of the sprayed concrete lining method—part II: milestones up to the 1960s. Kalman Kovári.

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Study on the supporting time of the secondary lining of ...

Jan 01, 2021  Study on the supporting time of the secondary lining of the highway tunnel with weak surrounding rock. Jiaqing Feng 1 ... 3 Shaanxi Key Laboratory of Safety and Durability of Concrete Structures, Xijing University, Xi'an, Shanxi ... Kalman K. 2003 History of the sprayed concrete lining method—part ii: milestones up to the 1960s Tunn. Undergr. ...

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Damage Analysis of Waterproof Layer in Composite Tunnel ...

[3] K. Kalman: History of the sprayed concrete lining method-part II: milestones up to the 1960s. Tunnelling and Underground Space Technology, Vo; 18, No. 1(2003), pp.71-83. DOI: 10.1016/s0886-7798(03)00006-3

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NATM is it New, Austrian or a Method? Geotechpedia blog

Kovari K., (2003). “History of the sprayed concrete lining method – part II: milestones up to the 1960s”, Tunnelling and Underground Space Technology

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Improved Performance of Rock Bolts using Sprayed Polyurea ...

Dec 21, 2014  Kovari K (2003) History of the sprayed concrete lining method-part II: milestones up to the 1960s. Tunn Undergr Space Technol 18:71–83. Article Google Scholar Li C, Lindblad K (1999) Corrosivity classification of the underground environment.

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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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Interface parameters of composite sprayed concrete linings ...

Oct 01, 2016  1. Introduction. Sprayed concrete lining (SCL) is an established tunnelling method used in many countries for the creation of underground space (Kovári, 2003a, Kovári, 2003b).Traditionally, SCL tunnels consist of a layer of sprayed primary lining (considered as temporary works, not part of the permanent structure), a layer of sheet waterproofing membrane and a layer of cast secondary lining ...

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Form ADV Part 2 - SEC

Part 2 of Form ADV sets out the minimum required disclosure that your . brochure (Part 2A for a firm . brochure, or Appendix 1 for a . wrap fee program brochure) and . brochure supplements (Part 2B) must contain. Read all the instructions, including General Instructions for Form ADV, General Instructions for Part 2

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Polyurea Geotextile Liner ACT, LLC

The Geotextile material adds additional Tensile strength and puncture resistance to the secondary containment. The Geotextile is then sprayed with 30 mil of a special Polyurea formula (designed for our Company), which allows the Polyurea to penetrate into the fibers, and then is sprayed with another 40 mil of the same polyurea.

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10.1016/S0886-7798(03)00006-3 DeepDyve

Jun 11, 2020  Only gradually were steel supports, then shotcrete, followed by anchors and finally, the systematic combination of these support measures on a broad scale, introduced. 2 Rock bolting technology Our research work reveals that the history of bolting began with a patent specification (no. 302909) submitted by Stephan, Fröhlich and Klüpfel in ...

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RILEM - Recommendations

The International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM) was founded with the aim to promote scientific cooperation in the area of construction materials and structures worldwide. This mission is achieved through collaboration of leading experts in construction practice and science including academics, researchers, industrialists, testing ...

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Interaction between two neighboring tunnel using PFC2D ...

Jul 10, 2019  In this paper, the interaction between two neighboring tunnel has been investigated using PFC2D. For this purpose, firstly calibration of PFC was performed using Brazilian experimental test. Secondly, various configuration of two neighboring tunnel was prepared and tested by biaxial test. The maximum and minimum principle stresses were 0.2 and 30 MPa respectively.

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IS 5878-4 (1971): Code of practice for construction of ...

2.12 Shotcrete - Concrete sprayed under pressure. 2.13 Truss Panels - These serve a function similar to that of crown bars. These are located at the spring line and constitute a temporary support,for ribs while taking out the bench and are replaced by posts in the final stage of erection.

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American Concrete Institute

The American Concrete Institute (ACI) is a leading authority and resource worldwide for the development and distribution of consensus-based standards, technical resources, educational programs, certification programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.

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Ausschreibung der Bahntechnik am Gotthard-Basistunnel ...

Toggle navigation. Quicklinks. Search this site; Contact

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Geschichte der. History of the Sprayed Concrete Lining ...

History of the Sprayed Concrete Lining Method, Part IV Milestones in Developement up to 1960 Prof. Dr. K. Kovári The previous parts of the article (Parts I III, see Tunnel 1/2002 to 3/2002) showed how the sprayed concrete lining method developed in the 1950s to become a

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📑 Tunnelling and Underground Space Technology

History of the sprayed concrete lining method-part II: Milestones up to the 1960s ... Their history began with a patent application in 1913 in Germany. ... sprayed concrete and anchors has led to ...

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Finite Element Analysis of Curvature Precast Polymer Panel ...

[1] Kovári, K., History of the sprayed concrete lining method-part II: milestones up to the 1960s. Tunnelling and Underground Space Technology, 2003. 18(1): pp.71-83. DOI: 10.1016/s0886-7798(03)00006-3

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primary support Geotechpedia blog

Kovari K., (2003). “History of the sprayed concrete lining method – part II: milestones up to the 1960s”, Tunnelling and Underground Space Technology

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Failure mechanism of bolting support and high-strength ...

Feb 03, 2016  History of the sprayed concrete lining method—Part I: Milestones up to the 1960s [J] ... History of the sprayed concrete lining method—Part II: Milestones up to the 1960s [J] KovÁri, K. Mechanism study on strength enhancement for the rocks surrounding roadway supported by bolt [J] Hou, C-j; Gou, P-feng.

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Interface parameters of composite sprayed concrete linings ...

Oct 01, 2016  1. Introduction. Sprayed concrete lining (SCL) is an established tunnelling method used in many countries for the creation of underground space (Kovári, 2003a, Kovári, 2003b).Traditionally, SCL tunnels consist of a layer of sprayed primary lining (considered as temporary works, not part of the permanent structure), a layer of sheet waterproofing membrane and a layer of cast secondary lining ...

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High-density polyurethane rigid foam usability as liner ...

Jun 01, 2020  Kovari K (2003a) History of the sprayed concrete lining method-part I: milestones up to the 1960s. Tunn Undergr Sp Tech 18:57–69. Article Google Scholar Kovari K (2003b) History of the sprayed concrete lining method-part II: milestones up to the 1960s. Tunn Undergr Sp Tech 18:71–83

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Thermal and Mechanical Studies of Thin Spray-On Liner (TSL ...

The thesis presents a summary of Thin Spray-On Liner (TSL) effects on concrete. Three aspects, fire insulation, adhesion strength on concrete surface and load carrying capacity (i.e. flexural strength) on segmental concrete liners, are presented. Small-scale to full-scale laboratory tests were conducted using ASTM standards or devised methods. The

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Sprayed Concrete - Shotcrete Solutions CEMEX UK

Sprayed concrete can be used in a variety of applications, including tunnelling projects - primary secondary linings and for regulating layers. It can also be used for embankment stabilisation, pile facing, concrete Repairs – including bridges, walls structures, flood structures, Freeform Structures such as skate parks pools and more.

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Freeze–thaw resistance of sprayed concrete in tunnel ...

Aug 27, 2015  Freeze–thaw exposure of wet-mix sprayed concrete for permanent tunnel linings is characterized by thermal and moisture gradients between wet temperate rock mass/concrete and cold dry concrete/air surface. Hardened sprayed concrete with water/binder ratios in the range of 0.45–0.47 has been studied. The standard freeze/thaw tests like e.g. salt frost scaling according to CEN/TS

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Analytical study on pretensioned bolt-cable combined ...

May 14, 2020  Ovári K. History of the sprayed concrete lining method—Part II: Milestones up to the 1960s. Tunn Undergr Sp Tech, 2003, 1: 71–83. Google Scholar 3. Hoek E, Brown E T. Underground Excavations in Rock. Boca Raton (FL): CRC Press, 1980. Google Scholar 4. Windsor C R. Rock reinforcement systems.

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Safety of the New Austrian Tunnelling Method

A review of sprayed concrete lined tunnels with particular reference to London clay This report, published in 1996, explains the problems in defining the New Austrian Tunnelling Method (NATM). It deals with the worldwide history of NATM failures and collapses and describes the legislation, the importance of a risk-based approach and

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Benoit Inbye Engineering

A 20-year history of stress and strain in a shotcrete primary lining. Proceedings of the 8th Int. Symp. Sprayed Concrete – Modern use of wet mix sprayed concrete for underground support, Trondheim, Norway, 11th-14th June 2018. Jones, B. D., Runtemund, K. Ahuja, V. (2017). European case studies of shotcrete strength monitoring using thermal ...

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HyperWar: Building the Navy's Bases in World War II ...

The walls were built in 5-foot lifts, using quarter-inch steel lining plates as the inside forms. Delivery of concrete into place behind the lining was made as the lining was installed. In general, lining operations were kept two lifts ahead of concreting. The cycle of operations was repeated until the previously completed upper dome was reached.

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