高速公路路基工后长期沉降稳定判别

随着高速公路建设的迅速发展,公路软基工后长期沉降问题日益得到重视,预测工后长期沉降和判别工后长期沉降是否稳定对高速公路养护和拓宽至关重要。文章提出了路基工后长期沉降稳定的标准,即:路基某时间段的实测沉降小于次固结沉降计算值、且实测沉降速率小于次固结沉降速率的计算值,并应用实际工程中;并对盐靖高速公路和启杨高速公路路基沉降观测资料进行分析,认为次固结沉降与主固结沉降之间呈线性正相关关系。

Stability Judgement for Subgrade Long-team Settlement after Construction of Expressway

With the rapid development of highway construction,the long-term settlement of soft foundation was paid more attention to.It was essential for highway conservation and widen to predict the long-term settlement and judge whether the settlement was stability after construction or not.In this paper,the judgement criteria for the long-term settlement after construction of the subgrade whether stable was submitted and applied in practical engineering.The criteria was that the measured settlement value was less than the secondary consolidation calculated settlement value and the measured settlement rate was less than the secondary consolidation calculated settlement rate.The settlement observation data of Yanjing expressway and Qiyang expressway were analyzed and it was founded that there was linear correlation between secondary consolidation settlement and primary consolidation settlement.