SONGKLANAKARIN JOURNAL OF SCIENCE & TECHNOLOGY

Volume 42, No. 06, Month NOVEMBER, Year 2020, Pages 1344 - 1351

Masw and ert for near-surface characterization at the huai hong khrai royal development study center, doi saket, chiang mai, thailand

Siriporn Chaisri , Suwimon Udphuay , Niti Mankhemthong , Weerapan Srichan , Pitak Kempet and Phrudth Jaroenjittichai

Abstract Download PDF

Preliminary investigation of subsurface properties by geophysical methods were carried out over the construction site of the 40 meters Thai National Radio Telescope (TNRT) facility planning by National Astronomical Research Institute of Thailand (NARIT) in the Huai Hong Khrai Royal Development Study Center, Doi Saket, Chiang Mai, Thailand. Multichannel analysis of surface waves (MASW) and electrical resistivity tomography (ERT) were utilized in mapping of Vs distribution to obtain information on ground stiffness and other supporting information on subsurface electrical resistivity, respectively. Results from data analysis showed that the topsoil was very dense with thickness irregularly varied from 5 meters to10 meters overlying the bedrock with high variation in stiffness caused by the different degrees of weathering. The information obtained led to the conclusion that the proposed TNRT facility construction site is in the category of site class B of which the ground stability is moderate and less vulnerable to earthquake damages.

Keywords

MASW, ERT, NARIT, shear-wave velocity, electrical resistivity

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