软土路基堆载预压过程中的变形及控制标准分析研究

Analysis and Research on Deformation and Control Standard in Preloading Process of Soft Soil Subgrade

软土路基填筑施工稳定问题主要借助现场监测预防与控制。因此,为研究堆载预压法变形特点,通过有限元模拟某路堤工程堆载预压法施工过程,将计算结果与实测数据进行比对,验证了模型的准确性和可靠性;利用数值模拟结果分析土体固结过程中沉降速率和水平位移速率的变化情况,并探讨了以速率作为控制标准的合理性,得到了地表沉降速率应根据不同的施工期采取不同控制指标的结论,为路堤堆载预压工程的监测和预测提供了参考,具有实际应用意义。

The stability of soft soil embankment construction in road subgrade is primarily addressed through on-site monitoring,prevention,and control measures.Finite element method is conducted to analysis the deformation characteristics of the preloading method in embankment construction.The computed results are then compared with the monitoring data to validate the accuracy and reliability of the finite element model.The analysis of the results focus on the variations in settlement rate and horizontal displacement rate during the soil consolidation process and the rationality of using these rates as control criteria is explored.It is concluded that the settlement rate should be controlled by different indexes according to different construction period.The research and analysis on deformation and control standard provide references for monitoring and predicting the preloading engineering of road embankments,offering practical implications for the field.