软土路基分级填筑过程地表沉降规律分析

Ground settlement analysis on the process of stage-filling for soft clay roadbed

为有效解决软土路基填筑过程中引起的地表沉降问题,确保路基填筑质量和安全稳定,基于对软土路基地表沉降规律研究,结合中国中部某高速公路软土路基分级填筑工程实例,采用有限元技术模拟软土路基填筑过程,分析填筑过程中地表沉降规律。实例分析表明:软土路基在填筑过程中,地表横向断面沉降规律基本呈"盆"状,最大沉降为26 mm,满足软土路基填筑地表沉降值的最大范围。该计算方法及参数的选取科学可靠,可以用来模拟预测类似工程施工过程,为软土路基工程施工提供技术指导。

Surface subsidence in soft clay roadbed construction is inevitable.In order to warrant construction quality and roadbed stability,taking a soft clay stage-filling roadbed construction in Central China as an example,this study models the stage-filling process of soft clay roadbed construction using finite element method based on the analysis of surface settlement in soft clay roadbed,and analyzes the characteristics of ground settlement during soft clay stage-filling.The study results show that the ground cross-section settlement appears in a basin shape in the process of mollisol roadbed filling with a maximum settlement 26mm,which meets the maximum settlement standard of mollisol roadbed.The calculation method and the selected parameters are sound and reliable,and can be applied to forecast the construction process of similar projects.This study provides a technical guidance for similar soft clay roadbed construction projects.