Currently, timber piles are a widely used material in Southern Vietnam for reinforcing weak soil foundations prior to construction. However, Vietnam has not yet established any standards or guidelines for the design and calculation of this method, with most applications relying on empirical knowledge. In practical construction, a sand layer is typically placed on top of cừ tràm to enhance its performance, but there has been no specific research conducted on this practice. In this study, based on the results of static load testing on timber piles foundations, the authors evaluate the method using finite element analysis for comparison. Furthermore, the study proposes an enhancement to the efficiency of timber piles by incorporating a layer of high-strength geotextile above the timber piles. This research provides valuable insights for optimizing timber piles-based foundation reinforcement methods and suggests a practical approach for improving construction efficiency on weak soil.