Geotechnical Investigation Using Surface Waves Method: A Case Study of Sabet Bridge, Lamno, Aceh Province, Indonesia

Abstract

Sabet bridge is a connecting bridge between Lamno town and Jantho town in Aceh Province. The bridge is located in a mountainous area and geologically near to a karst formation. The surface is covered by a fluvial landscape which was deposited by coarse sand, gravels, pebbles, and boulders. The bridge foundation analysis consists of four points cone penetration test which capable to penetrate up to 2 meters. One borehole has an obstacle in penetrating due to gravel, pebble and boulder layers; which consume more drilling time and expensive. To solve this problem, a seismic surface waves method has been performed. Two seismic lines run above the planned site of bridge abutment. The investigation reveal the results, that the surface waves method can penetrate into subsurface more than 30 meters in depth; in which the requirement depth only 30 meters. The results from surface waves method reveal the suitability and high similarity with cone penetration test and borehole investigation methods.

Integrated Geophysical Analysis for Landslide Risk Mitigation: A Case Study on the Weak Zone Area of Jantho-Lamno Route, Aceh, Indonesia

“…This study addresses these gaps by presenting an integrated geophysical analysis specifically designed for landslide risk mitigation [4,5], with a focus on the weak zone area of the Jantho-Lamno Route in Aceh, Indonesia. The key difficulties in assessing landslide susceptibility in such terrains are met with an innovative combination of seismic refraction and geoelectric resistivity methods.…”