Buyung Mantap, Rendi Zoeyantara
Soil investigation is an essential stage in construction planning because soil characteristics influence the safety and stability of building foundation systems. This study aims to analyze soil characteristics through soil investigation activities as a basis for determining appropriate foundation types for building structures. The research method used was descriptive quantitative through field investigation and laboratory testing. Data were obtained through soil boring, Standard Penetration Test (SPT), soil sampling, and laboratory tests including water content, specific gravity, Atterberg limits, shear strength, and consolidation tests. The results indicate variations in soil characteristics based on depth, density values, mechanical parameters, and soil bearing capacity, which serve as the basis for foundation system evaluation. This study confirms that accurate soil investigation data can improve foundation design reliability, reduce the risk of construction failure, and support efficient building planning. An integrated approach combining field testing and laboratory analysis provides a more comprehensive understanding of soil behavior as a structural supporting medium.