摘要
针对传统地基沉降速率法存在的弊端,基于线性加载地基固结沉降的沉降速率法基本原理,将线性加载模式应用于堆石体指数型衰减蠕变模型,成功模拟了堆石体变形的时变规律。采用地基固结分析与堆石体道基蠕变分析耦合的方法,建立了用于道基工后沉降预测的道基顶沉降速率分析法,并进一步提出可考虑地基条件、工后沉降要求的道基顶沉降速率控制标准。通过国家重点工程的成功运用,验证这一方法的可靠性。道基表面沉降速率工程实践表明,该方法取消了填筑期沉降监测,避免了监测与施工的交互影响,具有普适性和工程实践价值。
To cope with the drawbacks of the traditional method of foundation settlement rate,according to the basic principles of settlement rate method based on primary consolidation settlement of the foundation with linear load mode,the linear load mode was first applied to exponential decay model of rockfill creep,and to time-dependent deformation of rockfill was simulated successfully.Using coupling analysis of ground consolidation and the rockfill creep,a subgrade surface settlement rate method for post-construction settlement prediction of airfield subgrade was established,and the control specification for airfield subgrade surface settlement rate was further proposed considering the engineering geological conditions and allowable post-construction settlement.The successful project practice applied in a major national project verified the reliability of this method.The engineering practice of the airfield subgrade surface settlement rate indicates that the method abolished settlement monitoring for embankment construction stage,avoided the interaction between construction and monitoring,and has universal significance and value of engineering practice.
出处
《公路交通科技》
CAS
CSCD
北大核心
2011年第11期7-11,共5页
Journal of Highway and Transportation Research and Development
基金
总部计划(BY208J027)
关键词
道路工程
工后沉降
沉降速率法
堆石体
固结
蠕变
road engineering
post-construction settlement
settlement rate method
rockfill
consolidation
creep
