直排式真空预压法在软基处理工程中的应用

摘要

The conventional vacuum preloading method is optimized to be straight-line vacuum preloading method in the project,which gives up medium-coarse sand,drain boards and filters are connected to reduce vacuum degree transmission path,decrease energy consumption and reach the planned effect. The theoretical computation and detection result prove that the application of straight-line vacuum preloading method saves cost and realizes reasonable construction period in contrast with the conventional technology. The improved soft base detection results meet the engineering requirements for soft soil compression coefficient,water content,void ratio,consolidation degree,settlement rate and vane-shear strength.%本工程采用的直排式真空预压法，是对传统真空预压工艺的优化。即取消中粗砂，排水板直接连接在滤管上，缩短真空度传递路径，降低能耗，取得预期效果。理论计算和检测均表明：直排式真空预压相对于传统真空预压工艺，可节约成本，工期合理；地基处理后检测结果表明：处理后软土压缩系数、含水率、孔隙比降低，固结度、沉降速率和十字板抗剪强度等均满足要求。