真空联合堆载预压沉降与固结度的计算研究

Study on the Calculation of Settlement and Consolidation Degree by Vacuum Combined Surcharge Preloading

软土地基监测对于信息化施工具有重要的指导意义。结合某真空联合堆载预压工程进行软基加固的监测数据,采用常用的方法推算最终沉降量和固结度,深入分析各种计算方法存在误差的原因,并对不同计算方法的适用性和局限性作出说明;通过对监测数据的分析,提出计算固结度时可将真空联合堆载预压法分为真空预压与堆载预压叠加的思路,从而建立由实测孔压—时间曲线推测固结度的孔压计算法。以期为今后的施工与监测工作提供参考。

Monitoring of soft soil foundation for information construction has an important guiding significance. Based on the monitoring data of a vacuum surcharge preloading engineering soft foundation reinforcement,some common methods are used to predict the final settlement and the degree of consolidation,and the reasons that a various calculation methods make the error are analyzed,and the applicability and limitations are explained. Through the analysis the monitoring data,the idea that the vacuum combined surcharge preloading method can be divided into vacuum preloading and surcharge preloading superimposed to calculate the degree of consolidation is put forward, according to the measured pore pressure-time curves speculation degree of consolidation calculation method of pore water pressure. In order to provide references for future construction and monitoring work.