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某城市新区滨海主次干道沿线均为深厚软土路基,软土层平均厚度超过20m,路基填筑高度2.0～8.0m。为控制工后沉降对道路正常使用的影响,设计时需选取可靠的沉降计算方法,确保工后沉降能够满足设计要求。本文对采用真空联合堆载预压法处治的道路先行段分别采用分层总和法和有限元方法进行了沉降计算,比对计算及实测结果表明,有限元计算结果与实测结果更为吻合,能够为路基处治方案的设计优化提供可靠的参考依据。
The coastal main and secondary roads of a new urban area of the city are deep soft soil subgrade, the average thickness of soft soil layer is over 20m, and the subgrade fill height is 2.0 ~ 8.0m. In order to control the impact of post-construction settlement on the normal use of the road, a reliable settlement calculation method should be selected during design to ensure that post-construction settlement can meet the design requirements. In this paper, the settlement calculation is carried out by using the stratified summation method and the finite element method respectively for the first section of the road treated by vacuum combined with surcharge preloading method. The comparison calculation and the measured results show that the calculated results are in good agreement with the measured results, It provides a reliable reference for the design and optimization of roadbed treatment plan.