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A 1994 update of study in progress
UNDERGROUND
242A Harbour road (PMTaylor)
tunnel
and
the
Los
Angeles
EXCAVATIONS:TUNNELS
Metro.
955320 A 1994 update of study in progress R. Craig, Tunnels & Tunnelling, 26(12), 1994, pp 37-38. The International Tunnelling Association currently has ten working groups of member nations and affiliate members. The following topics being covered by the working groups are discussed: research; contractual practices in underground construction; subsurface planning, health and safety at work; maintenance and repair of underground structures; design of underground structures; immersed and floating tunnels; shotcrete use; advantages of underground structures; and mechanized tunnelling. (P.M.Taylor) 955321 Instrumenting hard rock tunnels for a teat facility D. Madsen, R. Hammett 8 P. Collins, Tunnels & Tunnelling, 27(l), 1995, pp 39-42. In-situ bitumen extraction techniques are being investigated at the Alberta Gil Sands Underground Test Facility. Success of the technology depends on stability and safety of the access tunnels being maintained during production operations which involve steam injection. This article describes the project history, underground excavations, geology and geological investigations. The underground instrumentation installed in the underlying limestone rock is detailed. It comprises extensometers, thermocouples, convergence arrays, and piezometers. Results indicate thermal expansion dominates safety. movements are not affecting and ground (J.M.McLaughlin) 955322 Top drilling R. Yach, Water &Environment International, 4(32), 1995, pp 26,28. The use of directional boring during a project to install a new feeder line in rural Iowa. USA. is described. The borina technique allowed the successful crossing of an inters& highway and a creek. Drilling operations are outlined. Trenching was carried out with the Vermeer D-24 Navigator System. (P.M.Taylor) 955323 Policies influencing tbe design of the Richmond Transport Project S. Maiolini, S. Klein & R. Essex, Tunnelling & Underground Space Technology, 10(l), 1995, pp 3744. The Richmond Transport Project is one of the last elements of the Wastewater Master Plan for reducing combined sewer overtlows into San Francisco Bay. The project includes a 10 200-ft-long wastewater storage and diversion tunnel. The tunnel follows an alignment through sensitive urban areas and traverses portions of the Golden Gate National Recreational Area. Public policy issues that influenced the City’s approach to planning and designing this project were: the interactions with the numerous agencies involved; an ongoing public participation process; the development and evaluation of the various project alternatives; design accommodations to minimize construction impacts in this urban areas; and discharge modifications such as the underground overflow chamber system designed to eliminate future wastewater overflows at Baker Beach. (Authors) 955324 Driving the new St Clair River tunnel N. Harrison, Tunnels & Tunnelling, 27(l), 1995, pp 17-20. Describes tunnelling operations on the St Clair River Tunnel Project on the USA/Canada border. The new 1824m long,
8.4m internal diameter railway tunnel is required for larger cargo wagons. The geology of the area, consisting mainly of soft glacial clay with occasional boulders, is described. Tunnelling was conducted using an earth pressure balance machine (EPBM). Design and capabilities of the machine, tunnelling progress and problems are reported. Protection works where the tunnel passes under a refinery are described. Precast concrete. linings were used. Tunnel face operations, muck removal and disposal, and approach works are also described. (J.M.McLaughlin) 955325 Toronto’s Rapid Transit Expansion Program ANON, Tunnelring & Underground Space Technology, lo(l), 1995, pp 53-63. The article describes the major projects that comprise Toronto’s Rapid Transit Expansion Program, which will extend and improve the public transit network in the Greater Toronto Area. The article gives an overview of the professional services and construction for the Sheppard Subway, Eglinton West Subway and Wilson Yard Expansion projects, which have been approved by the Government of Ontario. The article also discusses funding for the project. (Authors) 955326 Twenty-five years of subway construction in Mexico City A. V. Vera, G. M. Gonzalez, L. B. R. Gonzalez, A. S. Gomez & J. M. M. Vara, Tunnelling & Underground Space Technology, 10(l), 1995, pp 65-77. Construction of Mexico City’s subway system began in 1968. The nature of the subsoil, as well as regional settlement and seismicity conditions, posed serious challenges to the project. To date more than 150 km of subway line have been constructed. The first lines were constructed using the underground, open caisson method; later lines were built overhead, in tunnel (successfully using the NATM), and on the surface. In some cases, excavations down to more than 15 m depth were. executed close to buildings of significant historical and architectural value. To accomplish this, accurate construction procedures were used to cross the existing lines without discontinuing their operation at any time. This paper summarizes these experiences. (Authors) 955327 Tight sites to clean seaside at Ramsgate R. N. Craig, Tunnels & Tunnelling, 27(l), 1995, pp 35-36. Summarises presentations and discussions at a British Tunnelling Society meeting on the UK’s Ramsgate waste water tunnels project. The scheme incorporates 7 tunnels for storm water storage. Circular precast wncrete linings were selected to prevent water ingress into chalk aquifer. Discussions centred round the contract forms, the problems of tunnelling and working around existing live sewers, and water inflows and chalk features. (J.M.McLaughlin) 955328 Inter Milan P. Wheeler, Ground Engineering, 27(8), 1994, p 23. Tunnelling on the cross city underground in Milan, Italy, is described. Settlement control requirements are strict. Ground improvements and diaphragm walling for a new station are detailed. Ground treatment is being carried out from a shield driven pilot bore and involves both conventional groups and microfine cement/bentonite grouts. Handling and injection of the microfine materials is described. Rising groundwater levels are causing problems. (J.M.McLaughlin) 955329 Drive way P. Wheeler, Ground Engineering, 27(8), 1994, pp 16-17.
242A Harbour road (PMTaylor)
tunnel
and
the
Los
Angeles
EXCAVATIONS:TUNNELS
Metro.
955320 A 1994 update of study in progress R. Craig, Tunnels & Tunnelling, 26(12), 1994, pp 37-38. The International Tunnelling Association currently has ten working groups of member nations and affiliate members. The following topics being covered by the working groups are discussed: research; contractual practices in underground construction; subsurface planning, health and safety at work; maintenance and repair of underground structures; design of underground structures; immersed and floating tunnels; shotcrete use; advantages of underground structures; and mechanized tunnelling. (P.M.Taylor) 955321 Instrumenting hard rock tunnels for a teat facility D. Madsen, R. Hammett 8 P. Collins, Tunnels & Tunnelling, 27(l), 1995, pp 39-42. In-situ bitumen extraction techniques are being investigated at the Alberta Gil Sands Underground Test Facility. Success of the technology depends on stability and safety of the access tunnels being maintained during production operations which involve steam injection. This article describes the project history, underground excavations, geology and geological investigations. The underground instrumentation installed in the underlying limestone rock is detailed. It comprises extensometers, thermocouples, convergence arrays, and piezometers. Results indicate thermal expansion dominates safety. movements are not affecting and ground (J.M.McLaughlin) 955322 Top drilling R. Yach, Water &Environment International, 4(32), 1995, pp 26,28. The use of directional boring during a project to install a new feeder line in rural Iowa. USA. is described. The borina technique allowed the successful crossing of an inters& highway and a creek. Drilling operations are outlined. Trenching was carried out with the Vermeer D-24 Navigator System. (P.M.Taylor) 955323 Policies influencing tbe design of the Richmond Transport Project S. Maiolini, S. Klein & R. Essex, Tunnelling & Underground Space Technology, 10(l), 1995, pp 3744. The Richmond Transport Project is one of the last elements of the Wastewater Master Plan for reducing combined sewer overtlows into San Francisco Bay. The project includes a 10 200-ft-long wastewater storage and diversion tunnel. The tunnel follows an alignment through sensitive urban areas and traverses portions of the Golden Gate National Recreational Area. Public policy issues that influenced the City’s approach to planning and designing this project were: the interactions with the numerous agencies involved; an ongoing public participation process; the development and evaluation of the various project alternatives; design accommodations to minimize construction impacts in this urban areas; and discharge modifications such as the underground overflow chamber system designed to eliminate future wastewater overflows at Baker Beach. (Authors) 955324 Driving the new St Clair River tunnel N. Harrison, Tunnels & Tunnelling, 27(l), 1995, pp 17-20. Describes tunnelling operations on the St Clair River Tunnel Project on the USA/Canada border. The new 1824m long,
8.4m internal diameter railway tunnel is required for larger cargo wagons. The geology of the area, consisting mainly of soft glacial clay with occasional boulders, is described. Tunnelling was conducted using an earth pressure balance machine (EPBM). Design and capabilities of the machine, tunnelling progress and problems are reported. Protection works where the tunnel passes under a refinery are described. Precast concrete. linings were used. Tunnel face operations, muck removal and disposal, and approach works are also described. (J.M.McLaughlin) 955325 Toronto’s Rapid Transit Expansion Program ANON, Tunnelring & Underground Space Technology, lo(l), 1995, pp 53-63. The article describes the major projects that comprise Toronto’s Rapid Transit Expansion Program, which will extend and improve the public transit network in the Greater Toronto Area. The article gives an overview of the professional services and construction for the Sheppard Subway, Eglinton West Subway and Wilson Yard Expansion projects, which have been approved by the Government of Ontario. The article also discusses funding for the project. (Authors) 955326 Twenty-five years of subway construction in Mexico City A. V. Vera, G. M. Gonzalez, L. B. R. Gonzalez, A. S. Gomez & J. M. M. Vara, Tunnelling & Underground Space Technology, 10(l), 1995, pp 65-77. Construction of Mexico City’s subway system began in 1968. The nature of the subsoil, as well as regional settlement and seismicity conditions, posed serious challenges to the project. To date more than 150 km of subway line have been constructed. The first lines were constructed using the underground, open caisson method; later lines were built overhead, in tunnel (successfully using the NATM), and on the surface. In some cases, excavations down to more than 15 m depth were. executed close to buildings of significant historical and architectural value. To accomplish this, accurate construction procedures were used to cross the existing lines without discontinuing their operation at any time. This paper summarizes these experiences. (Authors) 955327 Tight sites to clean seaside at Ramsgate R. N. Craig, Tunnels & Tunnelling, 27(l), 1995, pp 35-36. Summarises presentations and discussions at a British Tunnelling Society meeting on the UK’s Ramsgate waste water tunnels project. The scheme incorporates 7 tunnels for storm water storage. Circular precast wncrete linings were selected to prevent water ingress into chalk aquifer. Discussions centred round the contract forms, the problems of tunnelling and working around existing live sewers, and water inflows and chalk features. (J.M.McLaughlin) 955328 Inter Milan P. Wheeler, Ground Engineering, 27(8), 1994, p 23. Tunnelling on the cross city underground in Milan, Italy, is described. Settlement control requirements are strict. Ground improvements and diaphragm walling for a new station are detailed. Ground treatment is being carried out from a shield driven pilot bore and involves both conventional groups and microfine cement/bentonite grouts. Handling and injection of the microfine materials is described. Rising groundwater levels are causing problems. (J.M.McLaughlin) 955329 Drive way P. Wheeler, Ground Engineering, 27(8), 1994, pp 16-17.