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Liquefaction Hazard Assessment Using SPT and V$_{S}$ for Two Cities in India

Content Provider	Springer Nature Link
Author	Satyam, D. Neelima Rao, K. S.
Copyright Year	2014
Abstract	The seismic behavior of a saturated soil depends on the potential for significant strains or strength loss that can contribute to ground deformations or instability during an earthquake. Historic large earthquakes throughout the world explain that the liquefaction related ground failure commonly causes extensive structural and lifeline damage in urban areas. Detailed assessment of liquefaction hazard is important for evaluating and reducing the risk through appropriate mitigation techniques. Soil liquefaction generally occurs in areas underlain by low density, saturated granular sediments. The liquefaction susceptibility can be mapped using specific, well established geologic and geotechnical criteria. Damages caused by liquefaction of saturated soil revealed that after liquefaction the ground failed, sand boiling occurred and the structure subsided unevenly causing tilting, cracking or even collapse. After the devastating 2001 Gujarat earthquake, the Government of India has paid serious attention to carry out the detailed site characterization and ground response studies which are very crucial in seismic microzonation and it is also accepted as a guiding tool in land use planning and safe construction practices to avoid the loss from the future earthquakes. Very preliminary process of reducing the effects of earthquake is by assessing the hazard itself. As part of the national level microzonation program, Department of Science and Technology, Govt. of India has initiated microzonation of 63 cities in India. In this research paper two urban centers Delhi and Vijayawada city which falls in seismic zones IV and III respectively are considered for liquefaction hazard assessment. Since these two cities are falling in the areas with high and moderate seismic probability, there is a great need for the assessment of liquefaction potential. An attempt has been made estimate the liquefaction hazard for these two cities considered using the measured shear wave velocities and SPT borehole data. From the detailed liquefaction assessment, it is observed that the possibility is severe in the north and north eastern side of Delhi and is very less in the western side of the city. In the south and central part of the area where shear wave velocities of the soil strata is ≥180 m/s the possibility of liquefaction is unlikely and in Vijayawada city, the occurrence of liquefaction is likely at several locations especially in Patamata, Autonagar and Kanuru.
Starting Page	468
Ending Page	479
Page Count	12
File Format	PDF
ISSN	09719555
Journal	Indian Geotechnical Journal
Volume Number	44
Issue Number	4
e-ISSN	22773347
Language	English
Publisher	Springer India
Publisher Date	2014-01-26
Publisher Place	India
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Geoengineering, Foundations, Hydraulics Liquefaction potential Multichannel analysis of surface wave Hazard assessment Seismic microzonation
Content Type	Text
Resource Type	Article
Subject	Geotechnical Engineering and Engineering Geology

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