In-situ Dynamic Properties and Vs30 for Soil using Multi-channel Analysis of Surface Waves
Sudhir Singh Bhadauria *
University Institute of Technology, Rajiv Gandhi Proudyogiki Vishwavidyalaya Bhopal, Madhya Pradesh – 462033, India.
Ashita Singh
Department of Civil Engineering, University Institute of Technology, Rajiv Gandhi Proudyogiki Vishwavidyalaya Bhopal, Madhya Pradesh – 462033, India.
Ranjeet Joshi
Department of Civil Engineering, University Polytechnic, Rajiv Gandhi Proudyogiki Vishwavidyalaya Bhopal, Madhya Pradesh – 462033, India.
Ankit Jain
Department of Civil Engineering, University Institute of Technology, Rajiv Gandhi Proudyogiki Vishwavidyalaya Bhopal, Madhya Pradesh – 462033, India.
*Author to whom correspondence should be addressed.
Abstract
In present research, Vs30 and dynamic properties of soil for ten identified sites in the campus of the Rajiv Gandhi Technological University located in Bhopal (India) are evaluated using MASW method. Shear wave velocity (Vs) profile using three steps procedure consisting of obtaining multichannel data record on field, dispersion curve analysis and inversion is generated. The properties of soil such as density, shear modulus and poison’s ratio are calculated using MASW. The poisson’s ratio, soil density and the shear modulus are observed to vary in the ranges of 0.41 to 0.27, 1.80 to 2.11 g/cc and 46 to 409 MPa respectively along depth of soil. The shear wave velocity across depth is varying between 160 to 407 m/s indicating change in soil type from mostly soft clay soil, stiff soil to a very dense soil and soft rock.
Keywords: Multichannel Analysis of Surface Waves (MASW), seismic exploration, dynamic soil properties, site-response; site-characterization.