Field instrumentation in geotechnical engineering (series on rock and soil mechanics Volume 10)

60A 872120 Field instrumentation in geotechnical engineering (Series on rock and soil mechanics Volume 10) Hanna, T H Claustal: Trans Tech Publications. 1985, 843P A book for all those involved with the design, construction and maintenance of foundations or ground structures. The approach is to explain basic principles, identify limitations and errors, and present examples of good practice. The first chapter indicates where field instrumentation can be productively employed; the second explains how load can be measured: chapter 3 is concerned with the piezometer and its applications: chapter 4 examines measurement of total and effective stresses; chapter 5 reviews measurement of ground movement: chapter 6 looks at special foundation instrumentation; chapter 7 is concerned with some case studies; and the final chapter considers planning and interpretation of instrumentation programs. 872121 Bolmen Tunnel - tunnelling through the Staverhult fault zone Backblom, G; Stanfors, R Engn Geol V23, NI, Oct 1986, P45-57 Site investigation was intensified during the construction of the 80kin long Bolmen Tunnel where extensive faulting in the rock was expected. The aim was to find the most economically favourable tunnel line through the zones of faulting. Geophysical measurements were carried out, especially around the Staverhult Zone. The predicted geologic model that was prepared on the basis of the geophysical investigations indicated major faulting in the rock over a distance of about 300m. A well-planned method of tunnelling was prepared to achieve a high rate of production and safe working conditions. The method was used in driving through the zones of faulting, and, at the same time, the predicted geologic model was checked in step with the work. The geologic conditions encountered agreed well with the model. 872122 Engineering implications od deepwater geologic and soil conditions, Texas-Louisiana Slope Campbell, K J; Hooper, J R; Prior, D B Proc 18th Offshore Technology Conference, Houston, 5-8 Mar 1986 V1, P225-232. Publ Richardson, Texas: OCT. 1986 Potential sites for offshore structures in the Gulf of Mexico have been investigated and a variety of landforms are evident. The concepts of deepwater foundation investigations are discussed, and an integrated site investigation program consisting of: (l) reviw of existing data; (2) geophysical survey; (3) oceanographic study; (4) preliminary data interpretation; (5) soil sampling and in situ testing; (6) laboratory testing; (7) data analysis; and (80 synthesis of results and reporting is suggested.

Structural and geotechnical mapping 872123 Interpretive geotechnical investigation for Onion Creek Wastewater Interceptor Tunnels - Austin, Texas Lentell, R L; Valentine, R M Proc of the 1985 Rapid Excavation and Tunneling Conference, New York, 16-20 June 1985 V2, P611-630. Publ New York: AIME, 1985 Interpretive geotechnical investigations were performed for the construction of approximately 15,250m of wastewater interceptor tunnels in Austin, Texas, USA. Special conditions

include multiple crossings of Onion Creek with cover ranging from about 0.5 to 3m and the potential for mixed-face conditions consisting of water-bearing gravels overlying clay shale or siitstone. The methods and results of the geotechnical investigations are discussed and the inferred construction conditions are compared to those encountered during tunnelling. A suggested format is presented for interpretive geotechnical reports t'or underground construction projects. Auth.

Geophysical techniques See also." 872103 872124 Application of Rayleigh-FFT technique to three-dimensional magnetotelluric interpretation Daniyan. M A: Peeples, W J Ann Geophys V4, N4B. Aug I986, P441-456 The theoretical magnetotelluric response tbr earth models with a non-planar interface is studied. The electromagnetic fields were obtained by solving transformed partial differential equations obtained from Maxwell's equation. The Rayleigh-Fast Fourier Transform technique was used to compute the spectral components of the field. This technique is straightforward and efficient for simple 3-dimensional problems. Results are similar to those obtained using finite difference and integral equation techniques. 872125 Geophysical modelling and mapping of contaminated groundwater around three waste disposal sites in southern Ontario Greenhouse, J P; Slaine. D D Can Geotech J V23, N3, Aug 1986, P372-384 Electromagnetic geophysical techniques can be used to detect changes in groundwater conductivity. The sensitivity of the techniques has been examined by applying them to map contaminant plumes at three different sites. Response of the instruments is compared to conductivity measurements made in groundwater sampling wells. Results suggest that geophysical methods have a lot to offer the hydrologist, especially as reconnaissance techniques prior to starting a general sampling program. 872126 Shallow seismic reflection investigations of coal in the Sydney Basin Greenhalgh, S A; Suprajitno, M; King, O W Geophysics ~ 1 , N7, J,dy 1986, P1426-1437 Surface reflection profiling with the Mini-SOSIE technique successfully mapped shallow coal seam structure in the western Sydney Basin, New South Wales, Australia. Several minor faults and zones of fracturing were detected. Synthetic seismograms based on nearby borehole and petrophysical controls show excellent agreement with the Mini-SOSIE sections and illustrate the deleterious filtering effects of coal seams and sequences. 872127 Use of line current analogues in geomagnetic depth sounding Jones, A G J Geophys V60, N1, 1986, P56-62 In electromagnetic sounding, it is often convenient to interpret observations in terms of a line current beneath the recording locations as an analogue of the actual induction processes taking place. Errors resulting from treating the lower half space

:g 1986 Pergamon Journals Ltd. Reproduction not permitted