基于理论和实测的路基沉降混合预测方法

Mixed prediction method of embankment settlement based on theory and practical survey

为了准确的预测路基沉降,基于土基的固结理论,引入平均附加应力系数的概念,对路基沉降计算传统的分层总和法进行了改进;提出了考虑路基施工过程的路基最终沉降量计算理论与计算公式;建立了基于改进的分层总和法及实测的沉降量预测新模型;编制了基于改进的分层总和法和实测数据的路基沉降预测计算程序Settlement_Calculation;采用新的计算方法和计算程序,对安徽省某二级公路试验路段进行路基沉降观测和理论计算,得到的沉降预测值和实测值相对误差小于2.0%。

In order to forecasting the embankment settlement accurately,based on the consolidation theory of soil,the additional stress factor is introduced to improve the traditional delamination summation-method of the total embankment settlement,and the improved calculation theory and formula are put forward.A new calculation and prediction model is built based on the improved delamination summation-method and practical survey.The calculation program Settlement_Calculation for the calculation and prediction of embankment settlement is wrote based on the improved delamination summation-method and practical survey data.The survey and theory calculation for the test section of a secondary road in Anhui province is carried out adopting the calculation method and program.The results show that the error of the prediction value compared to the one of survey is less than 2.0%.2 tabs,2 figs,15 refs.