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Sewer tunnel in gassy rock
79-A 872275 Tunneling in gassy ground Critchfield, J W Proc of the 1985 Rapid Excavation and Tunneling Conference, New York, 16-20 June 1985 VI, P441-461. P,~bl New York: AIME, 1985 An overview of some of the basic issues related to tunnel construction in the presence of flammable and toxic strata gases is presented. Gas properties and possible sources are outlined for the various gases that are commonly encountered underground. Assessment of potential gas hazards prior to construction is discussed. Measures for mitigating the problem during construction are summarised. Auth. 872276 Sewer tunnel in gassy rock Peters. J F; Brev, F A; Neyer, J C; Gorman, R F; Critchfield, J W Proe of the 1985 Rapid Excavation and Tunneling Conference, New York, 16-20 June 1985 V1. P462-481. Publ New York: AIME, 1985 Experiences with methane and hydrogen sulphide gas encountered during design and construction of a sewer tunnel in rock, in Rochester, New York,are described. Design explorations are summarized, including geologic setting, measurement of gases in test borings, laboratory analyses of gas samples, and measurements of gas pressure and flow rates from a sealed borehole. Contract specifications regarding gas are outlined. Results of the Contractor's additional explorations and testing are presented, along with a description of selected equipment and provisions for ventilation and degassification. Auth. 872277 Los Angeles metro rail project design issues related to gassy ground Proctor, R J; Monsees, J E Proc of the 1985 Rapid Excavation and Tunneling Conference, New York, 16-20 June 1985 VI, P488-505. Publ New York: AIME, 1985 The tunnels of the Los Angeles Metro Rail Project are in a combination of conditions unique among the world's subways. Exploration and advanced study have defined the subsurface conditions, allowing the design and construction planning to include methods of mitigating the impact of gas and tar sands on construction and operation of the system.
872279 71 km of tunnelling tames the dostedalen melt water Wallis, S; Martin, D Tunn Tunnlg VI8, Nll, Nov 1986, P21-25 It is planned to use melt water from the Jostedalen glacier to generate hydroelectricity. Over 71 km of tunnels are required in good quality granite with little groundwater. Both drill and blast and full-face TBMs are being used. Details are given of the contracts awarded, including economics, penetration rate and wear with a TBM, drilling and blasting, powerhouse excavation and support, and the various shaft construction methods used, in particular raise boring. 872280 Terror Lake Hydroelectric Project - Kodiak Island, Alaska Bowerman, L D Proc of the 1985 Rapid Excavation and Tunneling Conference, New York, 16-20 June 1985 V2, P727-737. Publ New York: AIME, 1985 The excavation of 25,000 LF, 1 lft diameter, hard rock tunnel using a Robbins boring machine on the Terror Lake Hydroelectric Project on Kodiak Island, Alaska is presented. This tunnel was completed on a tight construction schedule under some unusual conditions. The tunnel was mined through hard massive granite with faults and high water flows up to 7000 GPM encountered at the heading in some areas. New innovations in equipment and cutter design were used. Auth. 872281 Agoyan Project, Ecuador - tunnel and underground powerhouse excavation Hanssen, O E Proc of the 1985 Rapid Excavation and Tunneling Conference, New York, 16-20 June 1985 V2, P773-781. Publ New York. A[ME, 1985 Details of the project, to construct: a concrete gravity dam; headrace tunnel, pressure shafts; powerhouse cavern; two tailrace tunnels; two deep vertical shafts for transportation of equipment and transmission cables; road works (including a long bridge and a road tunnel) and office buildings, a warehouse and a camp are presented.
Mines See also." 872035, 872142, 872151. 872172 872282 Modern mine shaft design in the UK Bell, M J Coil Guard V234, N9, Sept 1986, P423-424
Power plants 872278 Low cost construction techniques for small hydro Glover, B; Lindemark, J Civ Engng, London Sept 1986, P39-44
The essence of modern shaft design is to predict what conditions will occur whilst sinking, and to specify a means of achieving the finished structure within the constraints imposed. Site investigation, lining design and ground treatment are examined briefly illustrating their importance in shaft The Strieva project was to build a small hydroelectric plant on a remote island in north Norway, where only extremely lim- design. ited access to the dam site was possible. Two alternatives were evaluated: (1) a shallow-buried steel penstock and surface 872283 Mine roadways deformation power station; and (2) a reamed penstock and underground power station. Both used a rockfill dam constructed from in giggott, N Coil Guard V234, NIO, Oct 1986, P478-483 situ moraine materials and with a butyl rubber membrane. The costs of materials, equipment and construction were stud- Various aspects of strata loading and deformation of mine ied and the second alternative adopted. The shaft was sunk roadways are examined in order to provide a better underusing a special rock boring and reaming technique developed standing of the function of supports in such conditions. The for small, relatively short unlined shafts. investigation found that more effective strata control and © 1986 Pergamon Journals Ltd. Reproduction not permitted
872279 71 km of tunnelling tames the dostedalen melt water Wallis, S; Martin, D Tunn Tunnlg VI8, Nll, Nov 1986, P21-25 It is planned to use melt water from the Jostedalen glacier to generate hydroelectricity. Over 71 km of tunnels are required in good quality granite with little groundwater. Both drill and blast and full-face TBMs are being used. Details are given of the contracts awarded, including economics, penetration rate and wear with a TBM, drilling and blasting, powerhouse excavation and support, and the various shaft construction methods used, in particular raise boring. 872280 Terror Lake Hydroelectric Project - Kodiak Island, Alaska Bowerman, L D Proc of the 1985 Rapid Excavation and Tunneling Conference, New York, 16-20 June 1985 V2, P727-737. Publ New York: AIME, 1985 The excavation of 25,000 LF, 1 lft diameter, hard rock tunnel using a Robbins boring machine on the Terror Lake Hydroelectric Project on Kodiak Island, Alaska is presented. This tunnel was completed on a tight construction schedule under some unusual conditions. The tunnel was mined through hard massive granite with faults and high water flows up to 7000 GPM encountered at the heading in some areas. New innovations in equipment and cutter design were used. Auth. 872281 Agoyan Project, Ecuador - tunnel and underground powerhouse excavation Hanssen, O E Proc of the 1985 Rapid Excavation and Tunneling Conference, New York, 16-20 June 1985 V2, P773-781. Publ New York. A[ME, 1985 Details of the project, to construct: a concrete gravity dam; headrace tunnel, pressure shafts; powerhouse cavern; two tailrace tunnels; two deep vertical shafts for transportation of equipment and transmission cables; road works (including a long bridge and a road tunnel) and office buildings, a warehouse and a camp are presented.
Mines See also." 872035, 872142, 872151. 872172 872282 Modern mine shaft design in the UK Bell, M J Coil Guard V234, N9, Sept 1986, P423-424
Power plants 872278 Low cost construction techniques for small hydro Glover, B; Lindemark, J Civ Engng, London Sept 1986, P39-44
The essence of modern shaft design is to predict what conditions will occur whilst sinking, and to specify a means of achieving the finished structure within the constraints imposed. Site investigation, lining design and ground treatment are examined briefly illustrating their importance in shaft The Strieva project was to build a small hydroelectric plant on a remote island in north Norway, where only extremely lim- design. ited access to the dam site was possible. Two alternatives were evaluated: (1) a shallow-buried steel penstock and surface 872283 Mine roadways deformation power station; and (2) a reamed penstock and underground power station. Both used a rockfill dam constructed from in giggott, N Coil Guard V234, NIO, Oct 1986, P478-483 situ moraine materials and with a butyl rubber membrane. The costs of materials, equipment and construction were stud- Various aspects of strata loading and deformation of mine ied and the second alternative adopted. The shaft was sunk roadways are examined in order to provide a better underusing a special rock boring and reaming technique developed standing of the function of supports in such conditions. The for small, relatively short unlined shafts. investigation found that more effective strata control and © 1986 Pergamon Journals Ltd. Reproduction not permitted