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Seismic measurements for tomography (in French)
174A for hydropov, er projects in regions of complex tectonic disturbance, the main factor in the evaluation of engineering geology is the block structure of the rock foundations, in particular the inherited block movements. These affect, amongst others, valley morphology, occurrence of loose deposits, and structure and state of the rock mass. Examples are presented.
884158 Peculiarities and technology of highland vehicular tunnel prospecting Chkheidze, D V; Kutsnashvili, 0 V Proc 5tll International Congress International Association o f Engineering Geology, Buenos Aires, 20-25 October 1986 V3. PI491-1493. Publ Rotterdam. A A Balkema, 1986 A basic scheme for planning the investigations for crossmountain tunnels is presented, based on experiences in the USSR. The preliminary stage, at scales down to 1:25000, is to build a general structural and hydrological picture of the region. The second stage, at scale around I:10000, uses comparison with similar projects and aerial photography, for example, to refine the initial model and select the route. During the construction phase, exploration and reconnaissance drilling and geophysical techniques are added and final corrections to design made as driving continues.
884159 Stability of the slopes bordering the new 237 highway, between the Malalhuaca and Conflnencia rivers, Neuquen Province, Argentina Malagnino. E C Proc 5th International Congress International Association o f Engineering Geology. Buenos Aires. 20-25 October 1986 V3. PI495.1502. Publ Rotterdam: A ,4 Balkema. 1986 The route for highway 237 lies along the Limay River valley. Mass wasting phenomena are common in the slides, creep, mudflows and partially channelled flows, and rockfalls are found, along with hybrid failures. The main characteristics of the failure mechanisms are described. The valley slopes have been mapped, with 4 stability classifications: stable, potentially unstable (I and I!), and unstable. Potential for further instabil,ty is discussed
Geophysical techniques 884160 Surface geophysical techniques Barker. R D In: Groundwater: occurrence, derelopment and protection, edited by T W Brandon (Water Practice Manuals: 5) P271. 314. Publ London: Institution of Water Engineers and Scientists, 1986 Surface geophysical techniques are useful for almost all stages of groundwater development problems. The technique most usually employed is electrical resistivity, since it offers a clear response to variations in groundwater salinity and gives quantitative results. It is discussed in detail. Induced polarization, electromagnetic methods, seismic refraction and gravity surveying are also described. The application of the above techniques to general structural geological problems, location of buried valleys, investigation of gravel deposits, location of fracture zones and groundwater salinity problems is illustrated v,ith case studies
884161 Downhole geophysics Beesley, K In: Groundwater: occurrence, derelopment and protection. edited by T W Brandon ¢ Water Practice ,Wanuals: 5) P315352. Publ London: Institution of Water Engineers and Scientists. 1986 Downhole geophysical logging is used to gain information on geological formation and groundwater flow regime. Water well applications of geophysical logs may be divided into 3 categories: (I) constructional methods including casing collar location, and calliper, television, sonic.cement bond and acoustic televiewer logging: (2) fluid logging methods including temperature, conductivity and flow logging: and (3) formation logging methods including resistance and resistivity, spontaneous potential (SP), natural gamma ray, density (gamma-gamma) and neutron-neutron. The measurement method, interpretation and limitations of each technique are described. 884162 Principles of applied geophysics. Fourth edition Parasnis, D S New York." Chapman and Hall. 1986. 402P A revised edition of a comprehensive survey of modern geophysical methods used in oil. minerals and water exploration, and civil engineering. The methods covered include magnetic. gravitational, electrical, induced polarization, electromagnetic, seismic, radioactivity and well logging in oil fields. The emphasis is on physical explanation and practical geological applications. 884163 Cross-hole tomography for strongly variable media with applications to scale model data McMechan, G A; Harris. J M: Anderson. L M Bull Seismol Soc Am V77. N6. Dec 1987. P1945-1960 A cross-hole ray tomography system is designed for imaging strongly varying velocity distributions. Use of simultaneous iterative reconstruction technique (SIRT) is preferable over algebraic reconstruction technique (ART) due to its higher stability. The scale model data used produces results comparable to the equivalent synthetic cases. 884164 Seismic studies of the crust under the Williston Basin Kanasewich, E R: Hajnal, Z; Green, A G; Cumming G L: Mereu, R F; Clowes, R M; Morel-a-I'Huissier, P; Chiu, S; Macrides, C G; Shahriar, M; Congram, A M Can J Earth Sci V24. N i l . Not" 1987. P2160-2171 Spatial seismic refraction, using receivers arranged in an equilateral triangle, is used to obtain 3-d structure and velocity information for the crust under Williston Basin, Canada. Results indicate the existence of at least one low velocity layer, a north-south velocity discontinuity and a wide variation in crustal thickness (35-50km). 884165 Seismic measurements for tomography (In French) Coffee, O; Cote, P; Lafont, R; Piquard, R Bull Lt~zison Labs Ponts Chaussees N152. Nov-Dec 1987. P55-60 New, high performance data reception, acquisition, and processing equipment for cross hole seismic tomography is described. The developments decrease both field and data analysis times, and improve economy. Examples of its use are illustrated.
t ~ 1988 Pergamon Press pie. Reproduction not permitted
884158 Peculiarities and technology of highland vehicular tunnel prospecting Chkheidze, D V; Kutsnashvili, 0 V Proc 5tll International Congress International Association o f Engineering Geology, Buenos Aires, 20-25 October 1986 V3. PI491-1493. Publ Rotterdam. A A Balkema, 1986 A basic scheme for planning the investigations for crossmountain tunnels is presented, based on experiences in the USSR. The preliminary stage, at scales down to 1:25000, is to build a general structural and hydrological picture of the region. The second stage, at scale around I:10000, uses comparison with similar projects and aerial photography, for example, to refine the initial model and select the route. During the construction phase, exploration and reconnaissance drilling and geophysical techniques are added and final corrections to design made as driving continues.
884159 Stability of the slopes bordering the new 237 highway, between the Malalhuaca and Conflnencia rivers, Neuquen Province, Argentina Malagnino. E C Proc 5th International Congress International Association o f Engineering Geology. Buenos Aires. 20-25 October 1986 V3. PI495.1502. Publ Rotterdam: A ,4 Balkema. 1986 The route for highway 237 lies along the Limay River valley. Mass wasting phenomena are common in the slides, creep, mudflows and partially channelled flows, and rockfalls are found, along with hybrid failures. The main characteristics of the failure mechanisms are described. The valley slopes have been mapped, with 4 stability classifications: stable, potentially unstable (I and I!), and unstable. Potential for further instabil,ty is discussed
Geophysical techniques 884160 Surface geophysical techniques Barker. R D In: Groundwater: occurrence, derelopment and protection, edited by T W Brandon (Water Practice Manuals: 5) P271. 314. Publ London: Institution of Water Engineers and Scientists, 1986 Surface geophysical techniques are useful for almost all stages of groundwater development problems. The technique most usually employed is electrical resistivity, since it offers a clear response to variations in groundwater salinity and gives quantitative results. It is discussed in detail. Induced polarization, electromagnetic methods, seismic refraction and gravity surveying are also described. The application of the above techniques to general structural geological problems, location of buried valleys, investigation of gravel deposits, location of fracture zones and groundwater salinity problems is illustrated v,ith case studies
884161 Downhole geophysics Beesley, K In: Groundwater: occurrence, derelopment and protection. edited by T W Brandon ¢ Water Practice ,Wanuals: 5) P315352. Publ London: Institution of Water Engineers and Scientists. 1986 Downhole geophysical logging is used to gain information on geological formation and groundwater flow regime. Water well applications of geophysical logs may be divided into 3 categories: (I) constructional methods including casing collar location, and calliper, television, sonic.cement bond and acoustic televiewer logging: (2) fluid logging methods including temperature, conductivity and flow logging: and (3) formation logging methods including resistance and resistivity, spontaneous potential (SP), natural gamma ray, density (gamma-gamma) and neutron-neutron. The measurement method, interpretation and limitations of each technique are described. 884162 Principles of applied geophysics. Fourth edition Parasnis, D S New York." Chapman and Hall. 1986. 402P A revised edition of a comprehensive survey of modern geophysical methods used in oil. minerals and water exploration, and civil engineering. The methods covered include magnetic. gravitational, electrical, induced polarization, electromagnetic, seismic, radioactivity and well logging in oil fields. The emphasis is on physical explanation and practical geological applications. 884163 Cross-hole tomography for strongly variable media with applications to scale model data McMechan, G A; Harris. J M: Anderson. L M Bull Seismol Soc Am V77. N6. Dec 1987. P1945-1960 A cross-hole ray tomography system is designed for imaging strongly varying velocity distributions. Use of simultaneous iterative reconstruction technique (SIRT) is preferable over algebraic reconstruction technique (ART) due to its higher stability. The scale model data used produces results comparable to the equivalent synthetic cases. 884164 Seismic studies of the crust under the Williston Basin Kanasewich, E R: Hajnal, Z; Green, A G; Cumming G L: Mereu, R F; Clowes, R M; Morel-a-I'Huissier, P; Chiu, S; Macrides, C G; Shahriar, M; Congram, A M Can J Earth Sci V24. N i l . Not" 1987. P2160-2171 Spatial seismic refraction, using receivers arranged in an equilateral triangle, is used to obtain 3-d structure and velocity information for the crust under Williston Basin, Canada. Results indicate the existence of at least one low velocity layer, a north-south velocity discontinuity and a wide variation in crustal thickness (35-50km). 884165 Seismic measurements for tomography (In French) Coffee, O; Cote, P; Lafont, R; Piquard, R Bull Lt~zison Labs Ponts Chaussees N152. Nov-Dec 1987. P55-60 New, high performance data reception, acquisition, and processing equipment for cross hole seismic tomography is described. The developments decrease both field and data analysis times, and improve economy. Examples of its use are illustrated.
t ~ 1988 Pergamon Press pie. Reproduction not permitted