论文部分内容阅读
以在建的佛开高速公路拓宽工程为背景,分析在拓宽路基边载的作用下,新老路基的沉降变形规律。在此分析的基础上,根据新老路基路面结构路用性能以及变形稳定的要求,并结合现场观测资料,对软基上高速公路拓宽工程的沉降控制标准进行了研究。研究表明,对于拓宽工程软基应采用“三指标”的控制标准,即:拓宽路基施工期老路容许的横坡度变化率、新老路基工后容许横坡度变化率、拓宽路基的容许工后沉降量。
Taking the widening project of Fokai Expressway under construction as a background, the settlement regularities of new and old roadbed under the action of widening the load of embankment are analyzed. On the basis of this analysis, according to the pavement performance of old and new roadbed pavement structure and the requirements of deformation stability, combined with the on-site observation data, the settlement control standards of highway widening project on soft ground were studied. The research shows that the control standard of “three indexes” should be adopted for widening engineering soft ground, that is: to widen the allowable lateral gradient change rate of the old road in the construction period of the roadbed, to allow the change rate of lateral gradient of the new and old roadbed after construction, After the settlement.