真空预压联合水袋堆载法加固砂质吹填土地基离心模型试验研究OA

For a sandy fill foundation project in Dongguan City,centrifuge model tests were conducted to investigate the consolidation characteristics of sandy fill foundations reinforced using a combined vacuum preloading and water bag loading method.The variation patterns of pore pressure dissipation,earth pressure,and consolidation settlement during the consolidation process of sandy fill foundations were revealed.These findings were validated using pre-and post-consolidation moisture content and shear strength,and compared with on-site engineering monitoring results.The results indicate that the double drainage board achieves 1.387 times of the final settlement of the single drainage board.After 800 s,settlement rates,pore water pressure and earth pressure across all zones gradually stabilizes,with drainage boards becoming clogged.Compared to field monitoring results,the settlement measurements from the centrifugal model tests for the sand-filled embankment foundation are consistent with the on-site monitoring results.The centrifugal model tests effectively simulate field construction conditions,which provides valuable guidance for the project.