采用地震技术预测路基沉降量的方法研究

Research on Method Forecasting Subgrade Settlement Quantity by Seismic Techniques

采用有限元法求解比奥(B iot)固结方程计算路基沉降量是一种常用方法,通过三轴压缩试验来求取相应的弹性参数则耗时耗资。根据路基土的密度、速度与弹性参数(如弹性模量Es和泊松比μ)之间的关系,将速度和密度引入到有限元劲度矩阵方程来求解比奥固结方程,讨论了综合地震勘探在沉降检测与预测中的应用。理论模拟分析和实际应用结果表明,将地震技术用于地基沉降量计算中是有效的。

It is a common method to resolve concretion equation of Blot law by using Finite Element Method （FEM） for calculating subgrade settlement,but the method is restricted in application due to long time consumed and high cost for getting elastic parameters by triaxial test. According to the density, velocity and elastic parameters of the roadbed soil, such as the relation between elastic modulus E, and Poisson＇s ratio μ,this paper introduces velocity and density into rigid matrix to solve concretion equation of Biot law and discusses integrative seismic method in settlement calculation of roadbed soil. The simulation analysis and actual application result show that and forecast of roadbed settlement. seismic techniques are an effective method in examination and forecast of roadbed settlement.