考虑软土结构性损伤的路基沉降预测反分析

为了较好的预测工后沉降,从软土的结构性入手,考虑天然软土的结构性损伤,减少由于软土的扰动、损伤对计算结果精确性的影响,对受扰动软土的弹性力学特征值进行了修正;结合反分析方法,由沉降固结计算的角度对模型参数进行反分析,预测了沉降趋势,并与实际观测数据及理论计算数值进行比较,对工后沉降做出合理地预测.结果表明,软土路基沉降...

Back Analysis of Forecasting Road Foundation Settlement Considering Structural Damnification of Soft Soil

In order to predict the settlement after construction more exactly, started with structural character of soft soil, taken  natural soft soil structural damage into account, neglected the influence of soft soil disturbance and damage on the accuracy of the result, the elastic mechanical eigenvalues of the disturbed soft soil were amended. With back analysis method, back analysis of the model parameters was performed based on calculation of consolidation settlement to predict the subsidence trend, which was compared with the measured data and theoretical values to make a reasonable forecast  to the settlement after construction. The results show that (1) in the settlement prediction of soft soil subgrade, the structural damage of soft soil should not be ignored, the predicted values of soft subgrade settlement considering the amended soil parameters obtained from inversion are more closer to the measured values;  (2) the theory of back analysis can be applied according to the measured deformation and other observable information with  a series of feedback processing, the design and construction process could be closely linked, it is the basic and most important component of dynamic design.