Analysis of shear wave velocity to a depth of 30 m (Vs30) inTalise Village using Refraction Mikrotremor method

Abstract

Talise is an area with a fairly high construction activities at the present time. The condition of the buildings in this area is susceptible to damage. This problem is mainly caused by constructing many buildings without considering the structure of subsurface. The purpose of this study is to determine the classification and types of rock below the surface through the analysis of shear wave velocity to a depth of 30 m (Vs30) instudy area. The method used in this research wasRefraction Mikrotremor (Remi) that records a shear wave propagationhappening below the surface. Data processing was performed using Surface Wave Analysis Wizard and WaveEq (Surface Wave Analysis) programs.The interpretation of 6 tracks shows that the greater depth obtained, the greater value range of shear wave velocity happened. The results of this study werethe form of classification and subsurface rock types with 4 different study sites, namelyAbadi field, Jabal Nur field, Mapolda Sulteng, and School of Model Terpadu Madani. The former study site is classified astype E (soft soil), while the others are classified as type D (stiff soil).

Keywords:Refraction mikrotremor (ReMi), shear wave velocity, Vs30, classification of rock.