scholarly journals Investigation of Liquefaction and Lateral Spreading in Riverside Soils

2019 ◽  
Vol 2 (3) ◽  
pp. 1396-1409
Author(s):  
Sedat Sert ◽  
Ertan Bol ◽  
Aşkın Özocak
Keyword(s):  
Bearing Capacity ◽  
Soil Profile ◽  
Lateral Spreading ◽  
Liquefaction Potential ◽  
Geotechnical Assessment ◽  
Ground Conditions ◽  
Sakarya River

It is planned to construct some buildings within the scope of recreation project (Sakarya Park-2) which is planned to be built on the banks of Sakarya River in Erenler District of Sakarya Province. In this paper, the geotechnical assessment of the liquefaction and lateral spreading of the ground conditions is carried out for the structures planned to be built and the fortifications planned to be built on the riverside. In this study, plankote, current and application maps of the area were utilized and considering the seismicity of the region; soil profile was evaluated and possible problems were questioned by investigating foundation bearing capacity, settlements, liquefaction potential and lateral spreading risk.

Documenting Liquefaction and Lateral Spreading Triggered by the 12 January 2010 Haiti Earthquake

2011 ◽  
Vol 27 (1_suppl1) ◽  
pp. 93-116 ◽  
Author(s):  
Scott M. Olson ◽  
Russell A. Green ◽  
Samuel Lasley ◽  
Nathaniel Martin ◽  
Brady R. Cox ◽  
...  
Keyword(s):  
Bearing Capacity ◽  
Lateral Spreading ◽  
Haiti Earthquake ◽  
Cone Penetration ◽  
Surface Mapping ◽  
Cone Penetration Tests ◽  
Ground Conditions ◽  
Flow Failure ◽  
And Performance ◽  
Laboratory Index

The 12 January 2010 Haiti earthquake (Mw 7.0) caused extensive damage to the Port-au-Prince region, including severe liquefaction failures along the Gulf of Gonâve coastline, along rivers north of Port-au-Prince draining into the Gulf, and a liquefaction-induced structural/bearing capacity failure of a three-story concrete hotel along the southern coast of the Gulf. During two reconnaissance missions, the authors documented ground conditions and performance at eight sites that liquefied and two sites that did not liquefy. Geotechnical characterization included surface mapping, dynamic cone penetration tests, hand auger borings, and laboratory index tests. The authors estimated median peak ground accelerations (PGAs) of approximately 0.17g to 0.48g at these sites using the Next Generation Attenuation (NGA) relations summarized by Power et. al. (2008) . These case histories are documented here so that they can be used to augment databases of level-ground/near level-ground liquefaction, lateral spreading, liquefaction flow failure, and liquefaction-induced bearing capacity failure.

Geotechnical assessment of ground conditions around a tilted building in Cairo, Egypt using geophysical approaches

2013 ◽  
Vol 6 (12) ◽  
pp. 4961-4972 ◽  
Author(s):  
Fathy Shaaban ◽  
Ahmed Ismail ◽  
Usama Massoud ◽  
Hany Mesbah ◽  
Ahmed Lethy ◽  
...  
Keyword(s):  
Geotechnical Assessment ◽  
Ground Conditions

scholarly journals Bearing Capacity of T-Cross Section Piles in Sand

2017 ◽  
Vol 26 (3) ◽  
pp. 133-144
Author(s):  
Oleg Malyshev
Keyword(s):  
Bearing Capacity ◽  
Cross Section ◽  
Static Load ◽  
Vertical Load ◽  
Ground Conditions

Abstract This paper describes a series of pile tests in sand. T-cross and square cross section piles were jacking by static vertical load with a vibration. Special tests were carried out to examine the influence of T-cross section pile form on it bearing capacity, and the results of comparison bearing capacity on one cub meter of T-cross and square cross section jacking piles in the same ground conditions are described. The jacking vertical static load, sizes of displacements and compaction zones of a ground around a shaft of the experienced piles were investigated.

Replacing the Piled Foundations of the Houphouët-Boigny Bridge in Abidjan Cote d’Ivoire

2021 ◽  
Author(s):  
Ashkan Ameri ◽  
Adrian Mercer
Keyword(s):  
Bearing Capacity ◽  
Cote D'ivoire ◽  
Carbon Emissions ◽  
Ground Movement ◽  
Box Girders ◽  
Ground Conditions ◽  
Innovative Thinking ◽  
Mind Set ◽  
The Stability ◽  
Piled Foundations

Abstract Due to historical ground movement, increased traffic levels, and general degradation, this important road and rail bridge which provides an essential link between the interior of the country and the Port of Abidjan, required significant repair and reinforcement. This included strengthening the pre-stressed concrete box girders and replacement of the piled foundations. Replacement piles had to be adjacent to, and no longer than, the existing piles to not compromise the stability of the operational bridge during the works. The underlying geology, however, meant that the pile loads had to be predominantly transferred into the ground through end bearing. Rather than installing a greater number of piles or larger diameter piles, innovative thinking changed the usual mind-set of designing the piles to the prevailing ground conditions, to designing the ground conditions to suit the piles. Jet grouted columns were installed beneath the toes of the new piles to increase the bearing capacity of the ground. This significantly contributed to the sustainability of the project and reduced carbon emissions through saving concrete, steel, plus transportation and disposal of spoil.

End bearing capacity comparison of screw pile with straight pipe pile under similar ground conditions

2016 ◽  
Vol 12 (2) ◽  
pp. 415-428 ◽  
Author(s):  
Adnan Anwar Malik ◽  
Jiro Kuwano ◽  
Shinya Tachibana ◽  
Tadashi Maejima
Keyword(s):  
Bearing Capacity ◽  
Straight Pipe ◽  
Pipe Pile ◽  
End Bearing Capacity ◽  
Screw Pile ◽  
Ground Conditions

scholarly journals Liquefaction Potential Analysis in Bucharest City as a Result of the Ground Shaking during Strong Vrancea Earthquakes

2021 ◽  
Vol 8 (2) ◽  
pp. 113-138
Author(s):  
ANDREI BALA ◽  
DIETER HANNICH
Keyword(s):  
Lateral Spreading ◽  
German Research Foundation ◽  
Liquefaction Potential ◽  
Strong Earthquakes ◽  
Ground Shaking ◽  
Vrancea Earthquakes ◽  
Liquefaction Hazard ◽  
Institute Of Technology ◽  
The University ◽  
Bucharest City

Bucharest, the capital of Romania with about 2.5 million inhabitants, is frequently struck by intense, damaging earthquakes (2–3 events per century). The Collaborative Research Center 461 (CRC-461) entitled: “Strong Earthquakes - a Challenge of Geosciences and Civil Engineering” was established in July 1996 and ended in December 2007, but some projects continued until 2010. It was funded by the German Research Foundation and involved the University of Karlsruhe which today belongs to Karslruhe Institute of Technology. The CRC aimed strategic research in the field of strong earthquakes with regional focus on the Vrancea seismic events in Romania. Between 1995–2007 several research works were done in Romania, with the support of several Romanian research institutes and the University of Bucharest. One of the research questions was to study the occurring of liquefaction during strong earthquakes within the shallow sandy layers in Bucharest. In suitable conditions, strong earthquakes can cause, under certain geologic conditions, liquefaction and therewith ground failure as sand boils, lateral spreading, or differentiated subsidence. In the present paper we analyze the liquefaction risk for Bucharest. For this purpose, at 10 representative sites in Bucharest, Seismic Cone Penetration Tests (SCPTu) were executed. An area-wide evaluation of the liquefaction probability in Bucharest was established. The factor of safety (FS) against liquefaction and the probability of liquefaction (PL) were computed from the obtained test-data. For the first time, maps of the liquefaction potential index (Li) for Bucharest were outlined. This map shows how severe the liquefaction phenomena might be during strong Vrancea earthquakes in Bucharest, amplifying the site effects. Keywords: hydrogeologic conditions, liquefaction probability, liquefaction hazard, Bucharest city, strong Vrancea earthquakes

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