摘要
地铁隧道施工引发的地表沉降受多种因素的影响,致使一些常用的地表沉降评价预计方法具有局限性,在实际工程应用中出现较大误差。本文以北京地区地铁隧道开挖大量实测数据为基础,利用数学方法,引入两个修正系数,即地表最大沉降修正系数α,沉降槽宽度修正系数β,对Peck公式进行改进,使之适用于北京地区研究区段涉及的工况。研究表明,当α介于0.6~0.9之间、β介于0.5~0.9之间可以获得良好的预测曲线。
Because of many influential factors during subway tunnel construction,some common prediction methods of surface subsidence have limitations,and the prediction results have large gap in practical engineering.Therefore,this paper develops an improved Peck formula by introducing two correction factors： the maximum surface subsidence correction coefficient α,the width of settlement trough correction factor β.Through a large number of measured data of regression analysis,it is found that when α is between 0.6 ~ 0.9,and β is between 0.5 ~ 0.9,the curves can give a good prediction.
出处
《地下空间与工程学报》
CSCD
北大核心
2010年第4期789-793,共5页
Chinese Journal of Underground Space and Engineering
基金
国家自然科学基金项目(50678003)
"十一五"国家科技支撑计划(2006BAJ27B04)
关键词
地铁
地表沉降
PECK公式
回归分析
修正系数
subway
surface subsidence
Peck formula
regression analysis
correction factor
