Last edited by Malakinos
Tuesday, April 21, 2020 | History

1 edition of Crosshole investigations found in the catalog.

Crosshole investigations

Crosshole investigations

results from seismic borehole tomography

by

  • 29 Want to read
  • 36 Currently reading

Published by Nagra in Baden .
Written in English

    Subjects:
  • Seismic tomography.

  • Edition Notes

    StatementJörgen Pihl ... [et al.].
    SeriesTechnical report / NAGRA, National Cooperative for the Disposal of Radioactive Waste -- 87-28
    ContributionsPihl, Jorgen.
    The Physical Object
    Paginationviii, 75 p. :
    Number of Pages75
    ID Numbers
    Open LibraryOL21972611M

    BoMcratr provides optional mathematical constraints to counteract the nonuniqueness of tomographic reconstructions with crosshole data. These constraints include limiting the maximum and minimum velocities, fixing the velocity at any point to any value, and establishing layers in which velocity does not vary with horizontal by:   A direct current geophysical method using a pole-pole array between two boreholes, named MIMAFO, can provide structural information in all kinds of rocks. Data interpretation is made possible by Cited by: 1.


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Crosshole investigations Download PDF EPUB FB2

Crosshole seismic testing is a valuable technique for determining seismic velocity profiles for critical structure siting investigations. Improper field precedures, however, can result in the Author: Dwain K. Butler. In the tradition of Schr dinger's classic What Is Life?, this book is a tour-de-force investigation of the basis of life itself, with conclusions that radically undermine the scientific approaches on which modern science rests-the approaches of Newton, Boltzman, Bohr, and Einstein.

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Crosshole tomographic and crosshole work was performed at m long panel between KR4 and KR Piezoelectric seismic sources and receivers were used to record a high frequency signal. Unfortunately, this book can't be printed from the OpenBook. If you need to print pages from this book, we recommend downloading it as a PDF.

Visit to get more information about this book, to buy it in print, or to download it as a free PDF. This method uses data from ultrasonic probes lowered into parallel access ducts, or in a single access duct, in the deep foundation element to assess the homogeneity and integrity of concrete between the probes.

The data are used to confirm adequate concrete quality or identify zones of poor quality. If defects are detected, then further investigations should be made by excavation. Crosshole and downhole seismic surveying methods are being used increasingly in geotechnical investigations to evaluate dynamic properties of soils and rocks when earthquake effects on structures have to be considered.

The paper describes two case histories for which crosshole and downhole seismic surveying has been carried out. It was found that the Cited by: 2. Crossroads Investigations NE Street, Suite Miami, FL () Brickell Avenue, Suite Miami, FL () East Broward Boulevard, Suite Fort Lauderdale, FL () South Australian Avenue, Suite West Palm Beach, FL () Sawgrass Corporate Parkway.

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Luntley’s reading challenges the prevailing view that there is a grand sweep to Wittgenstein’s enterprise and marks a major departure from standard arguments about the nature of language Cited by: 5. currently used for near-surface site characterization or that have potential to aid in these investigations include: • Electrical — Electrical resistivity, electromagnetic (EM) induction, and ground-penetrating radar (GPR) • Seismic — reflection, crosshole transmission, and refraction • Gravitational •MagneticFile Size: 1MB.

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Geotechnical investigations are performed by geotechnical engineers or engineering geologists to obtain information on the physical properties of soil earthworks and foundations for proposed structures and for repair of distress to earthworks and structures caused by subsurface conditions.

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You can rely on us to conduct thorough and efficient private investigations that will surely exceed your expectations. Contact us today to schedule an initial consultation. In this section, we present three case studies to illustrate the potential of surface-based, borehole logging, and crosshole imaging geophysical methods for fractured-rock investigations.

Despite the presentation of each case study as focused on a different class of methods, we emphasize the importance of using methods in by: 6. Ace In The Hole Investigations.

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The Engineering and Environmental Geophysics Group at ETH Zürich owns ten channel Geometric's Geode have used them for a wide variety of projects that have included ultra-high resolution seismic reflection studies, relatively conventional seismic reflection surveying, surface and crosshole tomographic investigations and long-term microseismicity.

2) ASTM, Standard test methods for crosshole seismic testing Annual Book of ASTM Standards, Section 4, Vol.Designation: D /D M () ASTM (): “Standard test methods for crosshole seismic testing,†Annual Book of ASTM Standards, Section 4, Vol. Designation: D /D M, pp. Author: Naser A.

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The results of cross-hole seismic tomography at sites where there is good geological control are presented. Comparisons have been made between the tomograms and the geological cross sections in order to assess the technique under in situ conditions.

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