A Comparative Case Study on Drainage Consolidation Improvement of Soft Soil under Vacuum Preloading and Surcharge Preloading

Based on an improvement project of soft soil ground in Zhuhai City the Pearl River Delta, a comparative study vacuum preloading and surcharge was performed. The stratified settlements, excess pore water pressure, degrees consolidation are analyzed, along with horizontal displacement strength. results show that smaller secondary settlements than preloading. Primary settlement quickly increases increasing pressure less −40 kPa preloading, while also between 20 25 sharp increase strata permeability coefficient will induce degree has little effect degree. can be given priority to reduce foundation service stage.