[H-RE12] New Developments in Engineering Geology

[HRE12-P07] Thermal Conductivity of Quaternary Deposit Soils Influenced by Soil Density and Moisture Content

*ABDULL HALIM ABDUL^1,2,3, NURNILAMSARI AHMAD NIZIRIN, NURUL IZZATI AZMAN, MUHAMMAD IZZAT ABDULL HALIM, NUR IZZAH ABDUL AZIZ (1.GEOLOGICAL SOCIETY OF MALAYSIA, GSM, 2. INSTITUTE GEOLOGICAL MALAYSIA, IGM, 3. BOARD OF GEOLOGIST MALAYSIA, BOG)

Keywords:Quaternary Deposit,, Dual Probe Method,, Thermal Conductivity

This study aimed to understand how soil properties influencing heat transfer along the Kuala Perlis, Malaysia to Pulau Langkawi, Malaysia 132kV submarine power cable route. The area is dominated by silty clay. Soil thermal conductivity is influenced by two primary geotechnical parameters derived from laboratory tests : bulk density and moisture content. Results revealed a clear link between these factors and thermal conductivity, meaning denser and cohesive soils conducted heat more efficiently. Measured values ranged from 0.48 to 0.96 Wm(^-1) K^(-1), indicating moderate heat transfer capability. Specific heat capacity was determined to be 1381 J/Kg°C, reflecting the soil's ability to store heat energy. Thermal conductivity profiling across the route further confirmed the presence of clay, with values ranging from 0.48 to 0.98 Wm^(-1) K^(-1). These findings emphasize the importance of accurate soil thermal conductivity assessment for managing temperature effectively along the cable route.