Geospatial contour mapping of shear wave velocity for Mumbai city

Mhaske, Sumedh; Choudhury, Deepankar

doi:10.1007/s11069-011-9758-z

Cited by 55 publications

(12 citation statements)

References 16 publications

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“…Maheswari et al (2010) [4] reported that the corrected and uncorrected N values predicted V s with equal accuracy. Mhaske and Choudhury (2011) [15] also concluded that correlation of uncorrected SPT N value and shear wave velocity V s can give reasonably good estimate of value of shear wave velocity for typical soil of Mumbai city. In view of this, shear wave velocity is determined from the uncorrected N values.…”

Section: Shear Wave Velocity Based On N Valuementioning

confidence: 96%

Use of GIS Based Maps for Preliminary Assessment of Subsoil of Guwahati City

Sharma¹,

Rahman²

2016

GEP

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Guwahati, the major city in the North Eastern region of India is growing rapidly in every aspect with major infrastructures like sports complex, educational institutions, hospitals, flyovers, multiplex halls, etc. Knowledge of the subsurface soil condition is necessary to ensure the structural safety and serviceability of the above mentioned structures before any construction. Therefore, contour maps of Standard penetration test N value, ground water table and shear wave velocity map using Geographical Information System (GIS) platform will be of great help to the foundation designers at the initial stage for site selection and preliminary foundation design under static and seismic condition. Contour maps of Standard penetration test N value at different depth and average contour map of N value of Guwahati city have been prepared. Standard penetration Test N values and depth of water table were taken from a data base of 200 boreholes up to 30 meter depth to prepare N value contour map of Guwahati city. A regression equation between shear wave velocity Vs and Standard penetration test N value based on twenty seven previous similar correlations was also developed. This regression equation was used to determine shear wave velocity of Guwahati city. The average shear wave velocities for 30 m depth for all locations had been determined and used to generate map on (GIS) platform. Other subsurface geotechnical information of Guwahati city like soil classification and depth to water level from ground surface is also presented in the form of GIS based maps in order to form a data base.

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Section: Shear Wave Velocity Based On N Valuementioning

confidence: 96%

Use of GIS Based Maps for Preliminary Assessment of Subsoil of Guwahati City

Sharma¹,

Rahman²

2016

GEP

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“…Furthermore, in the USA, similar studies investigating the correlation between Vs and N30 showed that corrected SPT-N values yielded better correlations compared with the uncorrected SPT-N values [21]. In Japan, a great number of researchers developed correlations between the SPT-N and Vs values by taking the geological age and soil type into account.…”

Section: Maswmentioning

confidence: 99%

Correlations Between SPT, PMT and MASW on Quaternary Alluvial - Fluvial Sediments in Battalgazi, Malatya, Turkey

CEYLAN>¹,

Önal²

2020

nat

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The field tests such as the standard penetration test (SPT), pressuremeter test (PMT), and Multi-Channel Analysis of Surface Waves (MASW) give information about the stratigraphic properties, structure, underground water level, bearing capacity, and liquefaction of soil. The studies investigating the correlations between these tests are quite common. Most of the studies found in the literature have focused on sand, silty, and clay soils, while the number of studies about gravelly soils is limited. In the study area, the gravel content ranged from 0% to 47% depending on local differences. Gravel sizes reached 80 mm at certain locations but remained below them in most locations. In this study, it has been discussed that how correlation studies will change in heterogeneous soils. Among the correlations between the field test results, with the highest R 2 value of 0.6847, the strongest correlation was obtained between the PMT-P L value and SPT-N 60 value, while, with an R 2 value of 0.3906, the weakest correlation was between the PMT-E m value and MASW-V s value. The low R 2 values were attributed to the exceedingly heterogeneous structure of the soil and locally changing gravel amounts.

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“…Model B consists of 6 layers above bedrock. The shear wave velocity 'V s ' is estimated by using available correlations with SPT N values developed by Fujiwara (1972), Imai et al (1975), Imai and Tonouchi (1982), Mhaske and Choudhury (2011), Chatterjee and Choudhury (2013). The two models differ in the shear wave velocity profile.…”

Section: Soil Geometry Models Considered For the Present Studymentioning

confidence: 99%

Comparative Study of Seismic Ground Responses Using DEEPSOIL, SHAKE, and D-MOD for Soils of Goa, India

Naik

Choudhury

2014

Geo-Congress 2014 Technical Papers

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Seismic Ground Response Analysis (GRA) is carried out to quantify the effects of the local soil strata overlying the bedrock on the characteristics of the bedrock motion. In the present study, the variability in the seismic ground response is studied for various input parameters such as soil geometry, use of different shear modulus and damping curves and methods of analysis by using three software, viz. DEEPSOIL, SHAKE and D-MOD. The study is carried out for typical soil site located at Goa, India. Considerable differences are found in the output parameters, such as, amplification ratio, surface acceleration, peak spectral acceleration and the frequency content of the response spectrum using various input parameters. It is found that the soil model defined with more number of layers gives a better estimate of the ground response. The mean spectral values obtained by equivalent linear analysis are found to be higher than that of the non linear analysis. Non-linear ground response analysis is recommended as it represents the actual non-linear soil behavior and the software considered allow for its easy adoption.

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Geospatial contour mapping of shear wave velocity for Mumbai city

Cited by 55 publications

References 16 publications

Use of GIS Based Maps for Preliminary Assessment of Subsoil of Guwahati City

Use of GIS Based Maps for Preliminary Assessment of Subsoil of Guwahati City

Correlations Between SPT, PMT and MASW on Quaternary Alluvial - Fluvial Sediments in Battalgazi, Malatya, Turkey

Comparative Study of Seismic Ground Responses Using DEEPSOIL, SHAKE, and D-MOD for Soils of Goa, India

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