Subsurface sampling is essential for geotechnical investigations, mining exploration, and site characterization because the reliability of engineering analysis depends on the quality of collected soil and rock samples. Conventional sampling tools are commonly designed with fixed structural configurations, which limits their adaptability to varying sampling depths and often complicates maintenance during field operations. This study presents the design and conceptual evaluation of a modular rock and soil sampling device with interlocking segment geometry for field investigations. The proposed device consists of a penetration head, cylindrical modular segments, an internal sampling chamber, and a base coupling unit for connection with penetration equipment. The interlocking segment arrangement allows the device length to be adjusted by adding or removing modules according to the required sampling depth. The penetration head geometry facilitates ground entry while directing fragmented material into the sampling chamber. The modular configuration also simplifies maintenance and transportation. The design demonstrates improved adaptability and operational flexibility compared with conventional rigid sampling systems.
Mritunjay Kumar (Fri,) studied this question.