Seismic profiling of the sea-bottom in recognition of geotechnical conditions

Leszek J. Kaszubowski; Leszek J. Kaszubowski

doi:10.3934/geosci.2020013

AIMS Geosciences

2020, Volume 6, Issue 2: 199-230. doi: 10.3934/geosci.2020013

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Seismic profiling of the sea-bottom in recognition of geotechnical conditions

Leszek J. Kaszubowski ^,

West Pomeranian University of Technology, Szczecin, Geotechnical Engineering Department, Section of Engineering Geology and Hydrogeology, 70-310 Szczecin, Piastów 50 Ave., Poland

Received: 01 April 2020 Accepted: 21 May 2020 Published: 15 June 2020

Seismic surveys are widely applied in research on the recognition of geological and geotechnical conditions of seabed and ocean floor sediments. The methodology and equipment needed to carry out shallow seismic and direct geotechnical surveys, as well as the analysis of the results based on the survey of the Polish Baltic Sea bottom, shall be presented here. The interpretation of the seismic survey results is based on the analysis of the registration of different acoustic levels, characteristics of seismo-acoustic layers, their degree of readability and slope angles of individual acoustic reflections. The author deals with the analyses of seismic reflection data and tries to understand the wave image as best as possible. Based on the seismic registrations obtained by the Geofizyka-Toruń company, the author has elaborated interpretation patterns for the Polish Baltic sediments, which are also presented here. The seismic surveys were used to construct maps of specific levels with different geotechnical conditions in the sea-bottom and at a depth of 10, 20 and 30 m below the seabed. The author presents here new results of research related to the geotechnical characteristics of the Polish Baltic substrate at a depth of 30 m below the seabed. The geotechnical map of the Polish Baltic Sea of the substrate at the depth of 30 m below the sea-bottom, as prepared by the author, is very important for building deep foundations of marine constructions, such as oil and gas exploration and production platforms. Seismic surveys allow a good degree of recognition of various geotechnical types of soils in the Polish Baltic sea-bottom, for which approximate values of characteristic geotechnical parameters have been determined.
- seismic profiling,
- reflective method,
- equipment and methods of geotechnical research,
- sea-bottoms,
- geotechnical characteristics,
- geotechnical maps
Citation: Leszek J. Kaszubowski. Seismic profiling of the sea-bottom in recognition of geotechnical conditions[J]. AIMS Geosciences, 2020, 6(2): 199-230. doi: 10.3934/geosci.2020013

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Abstract

Seismic surveys are widely applied in research on the recognition of geological and geotechnical conditions of seabed and ocean floor sediments. The methodology and equipment needed to carry out shallow seismic and direct geotechnical surveys, as well as the analysis of the results based on the survey of the Polish Baltic Sea bottom, shall be presented here. The interpretation of the seismic survey results is based on the analysis of the registration of different acoustic levels, characteristics of seismo-acoustic layers, their degree of readability and slope angles of individual acoustic reflections. The author deals with the analyses of seismic reflection data and tries to understand the wave image as best as possible. Based on the seismic registrations obtained by the Geofizyka-Toruń company, the author has elaborated interpretation patterns for the Polish Baltic sediments, which are also presented here. The seismic surveys were used to construct maps of specific levels with different geotechnical conditions in the sea-bottom and at a depth of 10, 20 and 30 m below the seabed. The author presents here new results of research related to the geotechnical characteristics of the Polish Baltic substrate at a depth of 30 m below the seabed. The geotechnical map of the Polish Baltic Sea of the substrate at the depth of 30 m below the sea-bottom, as prepared by the author, is very important for building deep foundations of marine constructions, such as oil and gas exploration and production platforms. Seismic surveys allow a good degree of recognition of various geotechnical types of soils in the Polish Baltic sea-bottom, for which approximate values of characteristic geotechnical parameters have been determined.

References

[1]	Kaszubowski LJ (2016) Seismic profiling of the seabottoms for shallow geological and geotechnical investigations. In: Finkl CW, Makowski C (eds.). Seafloor mapping along continental shelves. Springer International Publishing Switzerland, Heidelberg New York Dordrecht London, 13: 191-243.
[2]	Jegliński B, Pruszkowski J (1981) Metodyka badań geologiczno-inżynierskich dla inwestycji portowych na przykładzie Portu Północnego (Metodology of the enginnering-geological research for port investments on the example of the Northern Port, in Polish). In: Subotowicz W (ed). Geologiczno-inżynierskie badania wybrzeża i dna Bałtyku Południowego, Gdańsk, 189.
[3]	Stucka B (1981) Badania geologiczno-inżynierskie dla posadowienia obiektów hydrotechnicznych w porcie Kołobrzeg (Enginnering-geological research for the foundation of hydrtechnical constructions in the port of Kolobrzeg, in Polish). In: Subotowicz W (ed). Geologiczno-inżynierskie badania wybrzeża i dna Bałtyku Południowego, Gdańsk, 206.
[4]	Pieczka FB (1981) Charakterystyka geologiczno-inżynierska osadów dennych Bałtyku (Enginnering-geological characteristics of the seabottom sediments of the Baltic, in Polish). In: Subotowicz W (ed) Geologiczno-inżynierskie badania wybrzeża i dna Bałtyku Południowego, Gdańsk, 72.
[5]	Jurowska Z, Kramarska R (1990a) Geological map of the Baltic Sea bottom, 1:200,000, sheet Dziwnów. Państw Inst Geol, Warszawa.
[6]	Jurowska Z, Kramarska R (1990b) Geological map of the Baltic Sea bottom, 1:200,000, sheet Szczecin. Państw Inst Geol, Warszawa.
[7]	Kramarska R (1991a) Geological map of the Baltic Sea bottom, 1:200,000, sheet Ławica Słupska. Państw Inst Geol, Warszawa.
[8]	Kramarska R (1991b) Geological map of the Baltic Sea bottom, 1:200,000, sheet Ławica Słupska N. Państw Inst Geol, Warszawa.
[9]	Michałowska M, Pikies R (1990) Geological map of the Baltic Sea bottom, 1:200,000, sheet Koszalin. Państw Inst Geol, Warszawa.
[10]	Pikies R (1992) Geological map of the Baltic Sea bottom, 1:200,000, sheet Południowa Ławica Środkowa. Państw Inst Geol, Warszawa.
[11]	Pikies R (1993a) Geological map of the Baltic Sea bottom, 1:200,000, sheet Basen Gotlandzki. Państw Inst Geol, Warszawa.
[12]	Pikies R (1993b) Geological map of the Baltic Sea bottom, 1:200,000, sheet Próg Gotlandzko-Gdański. Państw Inst Geol, Warszawa.
[13]	Pikies R, Jurowska Z (1994) Geological map of the Baltic Sea bottom, 1: 200,000, sheet Puck. Państw Inst Geol, Warszawa.
[14]	Uścinowicz S (1989) Geological map of the Baltic Sea bottom, 1:200,000, sheet Kołobrzeg. Państw Inst Geol, Warszawa.
[15]	Uścinowicz S, Zachowicz J (1989) Geological map of the Baltic Sea bottom, 1:200,000, sheet Nexo. Państw Inst Geol, Warszawa.
[16]	Uścinowicz S, Zachowicz J (1990) Geological map of the Baltic Sea bottom, 1:200,000, sheet Ronne. Państw Inst Geol, Warszawa.
[17]	Uścinowicz S, Zachowicz J (1991) Geological map of the Baltic Sea bottom, 1:200,000, sheet Slupsk. Państw Inst Geol, Warszawa.
[18]	Uścinowicz S, Zachowicz J (1993a) Geological map of the Baltic Sea bottom, 1:200,000, sheet Gdańsk. Państw Inst Geol, Warszawa.
[19]	Uścinowicz S, Zachowicz J (1993b) Geological map of the Baltic Sea bottom, 1:200,000, sheet Głębia Gdańska. Państw Inst Geol, Warszawa.
[20]	Uścinowicz S, Zachowicz J (1993) Geological map of the Baltic Sea bottom, 1:200,000, sheet Głębia Gdańska. Państw Inst Geol, Warszawa.
[21]	Wiłun Z (2013) Zarys geotechniki (Outline of geotechnics, in Polish). Wydawnictwo Komunikacji i Łączności,Warszawa, 724.
[22]	Mazurkiewicz BK (1985) Mechanika gruntów dna morskiego (Seabed soil mechanics, in Polish), Państ, Wydaw, Naukowe, Warszawa, 146.
[23]	Dembicki E (1987) Zagadnienia geotechniczne budowli morskich (Geotechnical issues of marine construction, in Polish). Wydawnictwo Morskie, Gdańsk, 280.
[24]	Kaszubowski LJ (2017) Badania sejsmiczne i sejsmoakustyczne w rozpoznawaniu warunków geologicznych i geotechnicznych podłoża gruntowego (Seismic and seismo-acoustic research in recognition of the geological and geotechnical conditions of the soil substrate; in Polish). In: Meyer Z (ed.) Regionalne Problemy Inżynierii Środowiska. Wyd. Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, Szczecin, 17-31.
[25]	British Geological Survey. Available from: http://www.bgs.ac.uk/sciencefacilities/marine-operations/geophysical-equipment.html.
[26]	Labaune C, Tesson M, Gensous B (2005) Integration of high and very high resolution seismic reflection profiles to study late Quaternary deposits of a coastal area in the western Gulf of Lions, SW France. Mar Geophys Res 26: 109-122. doi: 10.1007/s11001-005-3711-z
[27]	Rosa B (1987) Pokrywa osadowa i rzeźba dna (Sedimentary cover and surface of the seabottom, Eng Summ). In: Augustowski B (ed) Bałtyk Południowy (Southern Baltic). Ossolineum, Wrocław, 67-120.
[28]	Kaszubowski LJ, Coufal R (2008) Preliminary engineering-geological division of the Baltic Sea bottom (Polish part) in the light of geological maps of the Baltic and seismoacoustic research. 11^th Baltic Geotechnical Conference, Poland, Gdańsk, 399.
[29]	Kaszubowski LJ, Coufal R (2011) Analiza geologiczno-inżynierska dna polskiej części Morza Bałtyckiego (Enginnering-geological analysis of the Polish Baltic seabottom, Eng Summ). Biul Państwowego Inst Geol 446: 341-350.
[30]	Kaszubowski LJ, Coufal R (2014) Wytrzymałość na ścinanie i ściskanie gruntów polskiego Bałtyku na głębokości 10 i 20 m poniżej dna morskiego (Resistance of shear and compression of the Polish Baltic soils on the depth of 10 and 20 m below the seabottom, Eng Summ). Prz Geol 62: 609-620.
[31]	Look BG (2007) Handbook of geotechnical Investigation and Design Tables. Routledge.
[32]	Dadlez R (1995) Mezozoik (Mesozoic, in Polish). In: Dadlez R, Mojski JE, Słowanska B, et al. (eds). Atlas Geologiczny Południowego Bałtyku-tekst (Geological Atlas of the Southern Baltic-text), Państ Inst Geol, Warszawa, 16-19.
[33]	Rossa W, Wypych K (1981) Sejsmostratygrafia dna Bałtyku Południowego (Seismostratigraphy of the Southern Baltic seabottom, in Polish). In: Subotowicz W (ed.), Geologiczno-inżynierskie badania wybrzeża i dna Bałtyku Południowego, Gdańsk, 48.
[34]	Kramarska R, Uścinowicz S, Zachowicz J (2002) Cainozoic of the Southern Baltic-selected problems. Prz Geol 50: 709-716.

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