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Geotechnical processes for security shafts of the Premetro tunnel under the river Scheldt at Antwerp
126A surface disturbance grounds. Single double-track or two single-track bored tunnels were two potential techniques. The third was the under the roof method, involving diaphragm walls in slurry trenches, excavation down to roof level, roof construction, fill over the roof, and then construction below roof level by the top down method. 902494 Development and current experiences with double-shield TBMs in Italy Grandori, C
Tunnlg UndergroundSpace Technol V4, N3, 1989, P333-336 The double telescopic shield feature allows hard-rock machines to be used successfully in a wide range of geologies, with the use of appropriate ground support. Improvements to the original designs are considered, with respect to the telescoping section connecting the main shield, directional control and steering systems, cutterhead design, and motor control. 902495 Excavation of the Roosevelt Island valve chamber, New York City Dowey, E M
Proc 1987 Rapid Excavation and Tunnelling Conference, New Orleans, 14-17 June 1987 112. P881-898. Publ Littleton: Society of Mining Engineers. 1987
Groundwater problems See a~o: 902332 902498 Field application of a finite-element water-quality model to a coal seam with UCG burns Contractor, D N; EI-Didy, S M A
J Hydrol V109, N1/2, July 1989, P57-64 The flow of water and transport of water quality constituents associated with underground coal gasification burns in a coal aquifer is studied using two dimensional finite element analysis. The simplified model calculates piezometric head changes with time and water level rise in the cavity. When the cavity is full, it becomes part of the confined aquifer system, preburn groundwater conditions are reached, and flow out of the cavern begins, taking with it UCG contaminants. The water quality model then calculates pollutant transport. Environmental impacts of UCG burns can be modelled. 902499 Geohydrological research in relation to radioactive waste disposal in an argillaceous formation Patyn, J; Ledoux, E; Bonne, A
J Hydrol VI09, N3/4. Aug 1989, P267-285
The chamber complex lies in Fordham Gneiss, containing amphibolite and garnet bands of thicknesses up to 3 and 1.5m respectively. These bands lie subparallel to the foliation. Construction was primarily by drill and blast, using water gel based explosives. Strict control was imposed on surface environmental effects of blasting. Design. construction and support of the various sections are described. Raise drilling and reaming was used to construct inclined "lateral" shafts.
The method developed to evaluate the hydrology of the Boom clay formation in Belgium from the point of view of radioactive waste disposal is described. The hydrological and geological structure was surveyed, a numerical model developed to interpret field observations, an appropriate migration model which uses the results of the hydrodynamic model was constructed, and changes due to natural geological evolution considered. The importance of the role of confining layers in an adjacent multilayered aquifer system, and the importance of leakage flow on a regional basis are emphasised.
902496 Horizontal raise boring at John Day Dam Pcrcgoy, J
902500 Origin of mine water from interpretation of water analysis data Singh, R N
Proc 1987 Rapid Excavation and Tunnelling Conference, New Orleans, 14-17 June 1987 V2, P938-953. Publ Littleton: Society of Mining Engineers, 1987 The fish bypass tunnel at the John Day Dam, Columbia River, Oregon, was declared too small, and a larger conduit was constructed, the old tunnel being backfilled. This 2.74m diameter tunnel was excavated within the dam itself, in the core of cement bound river run material. Horizontal raise boring was considered the only method for this case, where only longitudinal loading is permitted. Problems encountered when drilling the low angle pilot hole are described. 902497 Geotechnical processes for security shafts of the Premetro tunnel under the river Scheldt at Antwerp Hemerijckx, E J V; Maertens, J
Proc Conference on Shaft Engineering, Harrogate, 5-7 June 1989 P207-211. Publ London: IMM, 1989 Excavation of 2 vertical extraction shafts to be connected to 2 tunnels for safety reasons is described. Before excavation, the groundwater level was lowered by installing 6 discharge wells around each shaft. Prefabricated tunnel segments were used and vertical grout columns injected at high pressure to create a barrier against remaining water. The shafts were connected to the tunnels by thrust jacking. The permanent lining was installed and the tunnel wall opened.
Min Sci Technol I/9, N2, Sept 1989, P149-167 Chemical methods can be used to identify the source of mine water inflow and help in design of remedial measures. Chemical analysis can distinguish characteristic groundwater zones in coal measures: normal shallow water, deep confined aquifer water, and water from abandoned workings. Case histories are presented. Gradual dilution of water from any source may indicate the onset of underground inundation. This phenomenon has been used to assess water danger in undersea mine workings. 902501 Recommendations for the treatment of water inflows and outflows in operated underground structures. Special report (In English and French) AFTES Working Group NI4
Tunnlg Underground Space Technol V4, N3, 1989, P343-407 Problems of leakage from and inflow to underground structures have been examined. Problems of waterproofing and repairs are considered in a general context. Eleven major topics are covered: operational conditions, impact on surrounding ground, required information, means of investigation, diagnostic processes for hydraulic structures, renovation and reinforcement methods for hydraulic structures, drainage, water collection and removal, grouting the surrounding soil, improving lining watertightness, and methods of installing waterproofing on the intrados.
~ 1990 Pergamon Press pie. Reproduction not permitted
Tunnlg UndergroundSpace Technol V4, N3, 1989, P333-336 The double telescopic shield feature allows hard-rock machines to be used successfully in a wide range of geologies, with the use of appropriate ground support. Improvements to the original designs are considered, with respect to the telescoping section connecting the main shield, directional control and steering systems, cutterhead design, and motor control. 902495 Excavation of the Roosevelt Island valve chamber, New York City Dowey, E M
Proc 1987 Rapid Excavation and Tunnelling Conference, New Orleans, 14-17 June 1987 112. P881-898. Publ Littleton: Society of Mining Engineers. 1987
Groundwater problems See a~o: 902332 902498 Field application of a finite-element water-quality model to a coal seam with UCG burns Contractor, D N; EI-Didy, S M A
J Hydrol V109, N1/2, July 1989, P57-64 The flow of water and transport of water quality constituents associated with underground coal gasification burns in a coal aquifer is studied using two dimensional finite element analysis. The simplified model calculates piezometric head changes with time and water level rise in the cavity. When the cavity is full, it becomes part of the confined aquifer system, preburn groundwater conditions are reached, and flow out of the cavern begins, taking with it UCG contaminants. The water quality model then calculates pollutant transport. Environmental impacts of UCG burns can be modelled. 902499 Geohydrological research in relation to radioactive waste disposal in an argillaceous formation Patyn, J; Ledoux, E; Bonne, A
J Hydrol VI09, N3/4. Aug 1989, P267-285
The chamber complex lies in Fordham Gneiss, containing amphibolite and garnet bands of thicknesses up to 3 and 1.5m respectively. These bands lie subparallel to the foliation. Construction was primarily by drill and blast, using water gel based explosives. Strict control was imposed on surface environmental effects of blasting. Design. construction and support of the various sections are described. Raise drilling and reaming was used to construct inclined "lateral" shafts.
The method developed to evaluate the hydrology of the Boom clay formation in Belgium from the point of view of radioactive waste disposal is described. The hydrological and geological structure was surveyed, a numerical model developed to interpret field observations, an appropriate migration model which uses the results of the hydrodynamic model was constructed, and changes due to natural geological evolution considered. The importance of the role of confining layers in an adjacent multilayered aquifer system, and the importance of leakage flow on a regional basis are emphasised.
902496 Horizontal raise boring at John Day Dam Pcrcgoy, J
902500 Origin of mine water from interpretation of water analysis data Singh, R N
Proc 1987 Rapid Excavation and Tunnelling Conference, New Orleans, 14-17 June 1987 V2, P938-953. Publ Littleton: Society of Mining Engineers, 1987 The fish bypass tunnel at the John Day Dam, Columbia River, Oregon, was declared too small, and a larger conduit was constructed, the old tunnel being backfilled. This 2.74m diameter tunnel was excavated within the dam itself, in the core of cement bound river run material. Horizontal raise boring was considered the only method for this case, where only longitudinal loading is permitted. Problems encountered when drilling the low angle pilot hole are described. 902497 Geotechnical processes for security shafts of the Premetro tunnel under the river Scheldt at Antwerp Hemerijckx, E J V; Maertens, J
Proc Conference on Shaft Engineering, Harrogate, 5-7 June 1989 P207-211. Publ London: IMM, 1989 Excavation of 2 vertical extraction shafts to be connected to 2 tunnels for safety reasons is described. Before excavation, the groundwater level was lowered by installing 6 discharge wells around each shaft. Prefabricated tunnel segments were used and vertical grout columns injected at high pressure to create a barrier against remaining water. The shafts were connected to the tunnels by thrust jacking. The permanent lining was installed and the tunnel wall opened.
Min Sci Technol I/9, N2, Sept 1989, P149-167 Chemical methods can be used to identify the source of mine water inflow and help in design of remedial measures. Chemical analysis can distinguish characteristic groundwater zones in coal measures: normal shallow water, deep confined aquifer water, and water from abandoned workings. Case histories are presented. Gradual dilution of water from any source may indicate the onset of underground inundation. This phenomenon has been used to assess water danger in undersea mine workings. 902501 Recommendations for the treatment of water inflows and outflows in operated underground structures. Special report (In English and French) AFTES Working Group NI4
Tunnlg Underground Space Technol V4, N3, 1989, P343-407 Problems of leakage from and inflow to underground structures have been examined. Problems of waterproofing and repairs are considered in a general context. Eleven major topics are covered: operational conditions, impact on surrounding ground, required information, means of investigation, diagnostic processes for hydraulic structures, renovation and reinforcement methods for hydraulic structures, drainage, water collection and removal, grouting the surrounding soil, improving lining watertightness, and methods of installing waterproofing on the intrados.
~ 1990 Pergamon Press pie. Reproduction not permitted