Prediction of the Soil Surface Displacement Behavior in Bangkok, Thailand

At present, soil displacement is still occurring continuously in some areas of Bangkok and urban areas. Groundwater level change has affected soil displacement around the central of Thailand. The old building and other buildings located in the Bangkok area have been directly affected when groundwater level changes. According to the regulation of groundwater pumping, the rate of groundwater consumption decreased. The groundwater level was recovered from 1997 until the present, referring to many observation wells in Bangkok. This study focused on the possibility of soil surface displacement during groundwater level recovery to the ground surface. The soil surface displacement prediction in Bangkok was mentioned using a theoretical calculation based on Terzaghi’s consolidation theory. The results were verified by comparing the results to the instrumentation data when the groundwater level increased to the ground surface. The results found that the soil surface displacement rates have rebounded from 0.01 to 0.35 cm/year. Soil surface displacement rates between theoretical calculation and observation data have similar trends.