真空预压联合堆载预压下软土地基强度增长计算方法研究
CALCULATION METHOD OF STRENGTH INCREMENT FOR SOFT SOIL IMPROVED BY VACUUM COMBINED WITH SURCHARGE PRELOADING
-
摘要: 真空预压联合堆载预压法是加固软土地基的有效方法。而目前相关规范计算该工法下地基土体的强度增长值, 往往会比实测值偏小。本文基于真空预压与堆载预压的加固机理, 根据真空预压和堆载预压下土体不同的固结特性, 提出了适用于真空联合堆载作用下土体强度增长的计算方法。并结合工程实例对计算方法的可靠性进行了研究, 对比结果表明该计算方法具有较高的准确性, 可方便地应用于工程设计和实践中。Abstract: Combination of vacuum preloading and surcharge preloading method is effective for reinforcing the soft clay foundation. However, the current relevant specifications estimated the soil strength increment as compared to the measured data. Considering the reinforcement mechanism of vacuum preloading and surcharge preloading, a calculation method of strength increment of soft soil under vacuum combined with surcharge preloading was proposed.A case history was adopted to verify the reliability of the proposed method and a good agreement was presented. The proposed method is applicable for the design in practice.
下载:
