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Methane hazards in tunnelling operations
45A 891362 Summit tmumel - post fire remedial works Duncan, S D; Wilson, W
Tunnels See also: 891123, 891157, 891139
Proe Tuunell~g '88, London, 18-21 April 1988 P87-95. Publ London: IMM, 1988
891358 Geotectmieal monitoring of tunnel boring machine drivages at the Domkin-Morien mine, Nova Scotia Gilby, J L; Yuen, C M K; Aston, T g C
CIM Bullaia V81, N915, July 1988, P60-72 A research programme undertaken to study rock deformation and support system response in drill and blast and TMB drivages of 2 tunnels through a sandstone-siltstone-mudstone sequence is presented. Rock displacement was monitored using rigid and flexible sonic probe borehole extensometers. Thrust blocks were installed between steel sets to gain a reaction for propulsion of the TBM. Load was evaluated by measuring surface strain on 2 opposite sides of the thrust block, and vibrating wire cells were used to measure radial and axial pressure on the steel sets. Convergence anchors and tape extensometers were used to measure tunnel convergence. Results are discussed.
891359 Static response of deeply buried elliptical tubes Moore, I D
J GeoteelJ Eagng Div ASCE V114, N6, June 1988. P672-687 A parametric study of deeply buried elliptical tubes in uniformly elastic ground is presented. Analytical methods are used to calculate structural behaviour under a number of conditions and finite element methods to analyse more general culvert behaviour. The results are presented as a series of figures, and a method to estimate distributions of hoop compression, bending moment and radial deflection around a burled elliptical tube developed. An example calculation to illustrate the method gives results comparable with more exact numerical solutions.
891360 TBM in lost contract rescue Wallis, S
Tuna Tunnlg V20, N7, July 1988, P25-26 The reclamation of abandoned sewer tunnel workings in thick sticky clays and fine sands in Houston, Texas, is described. Flooded shafts were dewatered using vacuum wells and a new earth pressure balanced shield tunnelling machine employed. Sharp curves precluded the use of pipe jacking. Concrete segmental lining was considered too expensive, and ribs and lagging were used for primary support, with geotextile behind the lagging to improve drainage.
The Summit tunnel, Lancashire, was the scene of a major fire. Damage to the brickwork lining and surrounding rock and two ventilation shafts was assessed. Core examination showed negligible damage to the rock. Some separation of layers of brickwork and vitrification of bricks was observed. Loose brickwork was removed and replaced by shotcrete lining or pressure grouted to the rock. Main stability problems were found in the vertical shafts and their intersection with the tunnel. A regular pattern of dowels, plus reinforced concrete shear keys and anchors were installed,then spray concrete cover added to the shaft bottoms.
891363 Methane hazards in tunnelfing operations Edwards, J S; Whittaker, B N; Durucan, S Proc Tunnelling '88, London, 18-21 April 1988 P97-110. Publ London: IMM, 1988 " The origins of methane, coal and oil related methane, and identification of sources are first considered. The safety hazards of methane/air mixtures are examined. Solubility of methane in water, occurrence of methane in groundwater, determination of methane in groundwater, and safe limits are discussed. Methane emission into tunnels, effects of tunnelling on methane flow, gas testing and environmental testing are considered from safety viewpoints.
891364 Construction of a difficult tunnel in a developing country Erdemgil, M; Zaim, Y Proe Tunnelling '88, London, 18-21 April 1988 PI II-I I9. Pubi London: IMM. 1988 The 16km long Kinik tunnel, Turkey, was completed only after a 10 year construction period. It was driven through poor ground, below the water table, and aquifers containing water at high pressures created problems, particularly in compressed clayey zones. Most of the delay was due to face collapse due to high pore pressures at various fault zones. Contractual and financial problems related to working in developing countries, and lack of an experienced and skilled workforce are discussed.
891365 Great Belt railway tunnel project, Denmark Eriksen, T; Craig, R N; Ostenfeid, K H: Bojesen, O
Proc Tunnelling '88, London, 18-21 April 1988 P121-134. Pubi London: IMM, 1988
891361 Further insights into the NATM Sauer, G
Tunn TunMg V20. NT, July 1988, P35.39 The 23rd Sir Julius Wernher Memorial Lecture. The history of the method is briefly outlined, and the principles and effects defined. Stress distribution and redistribution during and after tunnelling is discussed, and monitoring procedures suggested. Ground improvements to minimise disruption in urban areas are considered. Finally, the economic advantages of the method in relation to different rock classes are investigated.
A fixed link across the Great Belt is proposed. It will be part tunnel and part bridge, as an island exists in the channel. The geology is glacial tills over partly fissured marl with chalk bedrock. Options under active consideration are discussed: concrete immersed tunnel; steel and concrete immersed tunnel; and a bored tunnel. A TBM drive would be necessary for the last option due to high face pressures, and the presence of boulders will also cause problems. A decision on construction method will allow commencement in late 1988.
© 1989 Pergamon Press pie. Reproduction not permitted
Tunnels See also: 891123, 891157, 891139
Proe Tuunell~g '88, London, 18-21 April 1988 P87-95. Publ London: IMM, 1988
891358 Geotectmieal monitoring of tunnel boring machine drivages at the Domkin-Morien mine, Nova Scotia Gilby, J L; Yuen, C M K; Aston, T g C
CIM Bullaia V81, N915, July 1988, P60-72 A research programme undertaken to study rock deformation and support system response in drill and blast and TMB drivages of 2 tunnels through a sandstone-siltstone-mudstone sequence is presented. Rock displacement was monitored using rigid and flexible sonic probe borehole extensometers. Thrust blocks were installed between steel sets to gain a reaction for propulsion of the TBM. Load was evaluated by measuring surface strain on 2 opposite sides of the thrust block, and vibrating wire cells were used to measure radial and axial pressure on the steel sets. Convergence anchors and tape extensometers were used to measure tunnel convergence. Results are discussed.
891359 Static response of deeply buried elliptical tubes Moore, I D
J GeoteelJ Eagng Div ASCE V114, N6, June 1988. P672-687 A parametric study of deeply buried elliptical tubes in uniformly elastic ground is presented. Analytical methods are used to calculate structural behaviour under a number of conditions and finite element methods to analyse more general culvert behaviour. The results are presented as a series of figures, and a method to estimate distributions of hoop compression, bending moment and radial deflection around a burled elliptical tube developed. An example calculation to illustrate the method gives results comparable with more exact numerical solutions.
891360 TBM in lost contract rescue Wallis, S
Tuna Tunnlg V20, N7, July 1988, P25-26 The reclamation of abandoned sewer tunnel workings in thick sticky clays and fine sands in Houston, Texas, is described. Flooded shafts were dewatered using vacuum wells and a new earth pressure balanced shield tunnelling machine employed. Sharp curves precluded the use of pipe jacking. Concrete segmental lining was considered too expensive, and ribs and lagging were used for primary support, with geotextile behind the lagging to improve drainage.
The Summit tunnel, Lancashire, was the scene of a major fire. Damage to the brickwork lining and surrounding rock and two ventilation shafts was assessed. Core examination showed negligible damage to the rock. Some separation of layers of brickwork and vitrification of bricks was observed. Loose brickwork was removed and replaced by shotcrete lining or pressure grouted to the rock. Main stability problems were found in the vertical shafts and their intersection with the tunnel. A regular pattern of dowels, plus reinforced concrete shear keys and anchors were installed,then spray concrete cover added to the shaft bottoms.
891363 Methane hazards in tunnelfing operations Edwards, J S; Whittaker, B N; Durucan, S Proc Tunnelling '88, London, 18-21 April 1988 P97-110. Publ London: IMM, 1988 " The origins of methane, coal and oil related methane, and identification of sources are first considered. The safety hazards of methane/air mixtures are examined. Solubility of methane in water, occurrence of methane in groundwater, determination of methane in groundwater, and safe limits are discussed. Methane emission into tunnels, effects of tunnelling on methane flow, gas testing and environmental testing are considered from safety viewpoints.
891364 Construction of a difficult tunnel in a developing country Erdemgil, M; Zaim, Y Proe Tunnelling '88, London, 18-21 April 1988 PI II-I I9. Pubi London: IMM. 1988 The 16km long Kinik tunnel, Turkey, was completed only after a 10 year construction period. It was driven through poor ground, below the water table, and aquifers containing water at high pressures created problems, particularly in compressed clayey zones. Most of the delay was due to face collapse due to high pore pressures at various fault zones. Contractual and financial problems related to working in developing countries, and lack of an experienced and skilled workforce are discussed.
891365 Great Belt railway tunnel project, Denmark Eriksen, T; Craig, R N; Ostenfeid, K H: Bojesen, O
Proc Tunnelling '88, London, 18-21 April 1988 P121-134. Pubi London: IMM, 1988
891361 Further insights into the NATM Sauer, G
Tunn TunMg V20. NT, July 1988, P35.39 The 23rd Sir Julius Wernher Memorial Lecture. The history of the method is briefly outlined, and the principles and effects defined. Stress distribution and redistribution during and after tunnelling is discussed, and monitoring procedures suggested. Ground improvements to minimise disruption in urban areas are considered. Finally, the economic advantages of the method in relation to different rock classes are investigated.
A fixed link across the Great Belt is proposed. It will be part tunnel and part bridge, as an island exists in the channel. The geology is glacial tills over partly fissured marl with chalk bedrock. Options under active consideration are discussed: concrete immersed tunnel; steel and concrete immersed tunnel; and a bored tunnel. A TBM drive would be necessary for the last option due to high face pressures, and the presence of boulders will also cause problems. A decision on construction method will allow commencement in late 1988.
© 1989 Pergamon Press pie. Reproduction not permitted