基于双曲线法的路基分级填筑施工稳定性控制研究

Research on Stability Control of Subgrade Construction by Multi-grade Filling Based on Hyperbolic Method

以福建省宁德市连城路(疏港路至学院路段)道路工程中塑料排水板堆载预压法处理软土地基项目为依托,提出了基于双曲线法的路基分级填筑稳定性预测模型,对路基稳定性控制进行了研究。研究结果表明,每级堆载时路基均迅速沉降且速率较大,在间歇阶段路基沉降趋于稳定,且按双曲线变化,每级堆载至间歇阶段构成沉降台阶状;现场监测数据系统地对路基分级填筑施工进行了控制,解决了传统竖井固结理论等问题;通过现场监测得到每级堆载的标准固结时间以及预估预压加固期,可用于指导路基分级填筑施工,提高了工程效率,确保了施工安全性。

Based on the soft soil foundation treatment project of Liancheng Road(Shugang Road to Xueshui Road)in Ningde City,Fujian Province,the prediction model of subgrade multi-grade filling stability by hyperbolic method is proposed to study the subgrade stability control.The results show that the subgrade sink rapidly and the rate is large during each stage of stacking.The subgrade settlement tends to be stable during the intermittent stage and varies with a hyperbola.The"settlement step shape"forms from each stage of stacking to the intermittent stage;The data obtained from field monitoring can systematically control subgrade flling construction and solve the problems of traditional shaft consolidation theory;The standard consolidation time and estimated preloading reinforcement period of each pile load are obtained through site monitoring,which can be used to guide subgrade filling construction,improve engineering efficiency,and ensure the construction safely and orderly.