By Peter K Trabant

ISBN-10: 9400964935

ISBN-13: 9789400964938

ISBN-10: 9400964951

ISBN-13: 9789400964952

The self-discipline encompassing using high-resolution geophysics for acquiring geoengineering survey info has developed speedily over the last a long time to turn into an interdisciplinary topic encompassing the fields of Geophysics, engineering, geology, marine geology, oceanography, and civil engineering. whereas high-resolution geophysical surveys are commonly played offshore this present day, this has been so basically because the past due Nineteen Sixties. High-resolution geophysical tools are hired within the offshore atmosphere to acquire a complete photo of the sea-floor mor­ phology and underlying shallow stratigraphy. the aim of the survey equipment is to aid within the layout and set up of bottom-supported buildings similar to drilling and creation structures and pipelines. Drilling buildings and pipelines of metal and/or concrete became behemoths with appreciate to their measurement and the complexity in their layout with a purpose to face up to, for sessions of as much as twenty-five years, an exceptionally harsh setting, together with typhoon waves, robust currents, volatile sea­ ground stipulations, and nice water depths. it's accordingly of paramount significance that the geometry and actual houses of the ocean flooring be good understood to be able to supply an enough origin for the layout lives of such buildings. On land, engineering origin info frequently could be acquired via visual view inspection and shallow borehole details, yet offshore the presence of the water column locations convinced constraints on geoengineering investigations. High-resolution geophysical equipment hired within the acquisition of geoengineering information offshore are outlined because the use of seismic assets and receivers that function at acoustic frequencies more than a hundred Hz.

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Extra resources for Applied High-Resolution Geophysical Methods: Offshore Geoengineering Hazards

Sample text

JJ) ' ... ·- -·· u to oroc ,..... tu,... IIOCk•ta . s, to kJ' . . __. ··--GQ,......... _ ........ __.. a. __.. _. ___ _ ~ r-----r- -r-r-- . ' I ' ~ .. ---· ~f i i • I . -. ,... ~~~GUG~~-~ ~~--~nwua~=~~~~~~_u~--n-~~-L--~-4 ~ ~~L_ ~ ~c::,~.. 2 Typical geoengineering profile of borehole data. ) 3. Marine Geotechnique, An Overview 29 description could be: dark brown or red silt, containing fragments of shell and organic debris and thin (I mm) sand laminations. The relative strength may also be described in the field on the basis of measurements made by a miniature vane, torvane, or pocket penetrometer.

The basic battery of Iabaratory tests performed upon marine sediment samples in evaluating their geotechnical properties may include: 3. 1 Vessel engaged in drilling geoengineering borehole. ) grain size analyses, water content, Atterberg limits, bulk density, and shear strength. Further testing may also include: specific gravity of the solids, porosity or void ratio, mineralogic composition, pore water chemistry, and consolidation properties. The following are brief descriptions of the tests and analyses that may be performed on core samples obtained for geotechnical engineering purposes.

Ml• ·•l U~ • l lt~ tt). ~' nl' ,. ),,. ,"'r•IU. II ,, . rtfoQIIIot'l'a. JJ) ' ... ·- -·· u to oroc ,..... tu,... IIOCk•ta . s, to kJ' . . __. ··--GQ,......... _ ........ __.. a. __.. _. ___ _ ~ r-----r- -r-r-- . ' I ' ~ .. ---· ~f i i • I . -. ,... ~~~GUG~~-~ ~~--~nwua~=~~~~~~_u~--n-~~-L--~-4 ~ ~~L_ ~ ~c::,~.. 2 Typical geoengineering profile of borehole data. ) 3. Marine Geotechnique, An Overview 29 description could be: dark brown or red silt, containing fragments of shell and organic debris and thin (I mm) sand laminations.

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Applied High-Resolution Geophysical Methods: Offshore Geoengineering Hazards by Peter K Trabant


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