用有限元法评定混凝土路面板下地基脱空  

Judgement and evaluation of foundation void under concrete pavement slab by finite element method

作　　者：肖林峻[1] 李丽民[2] 韩振中 

机构地区：[1]聊城大学建筑工程学院,山东聊城252000 [2]湖南城市学院,湖南益阳413000 [3]贵州省交通建设工程质量监督站,贵州贵阳550004

出　　处：《中南林业科技大学学报》2010年第1期73-78,共6页Journal of Central South University of Forestry & Technology

基　　金：重庆市科委攻关项目(2005-8347)

摘　　要：通过对第一传荷状态临界荷载及其对应弯沉影响因素的分析,发现以与第一传荷状态临界荷载相对应弯沉作为地基脱空评定指标是可行的。提出了一种用有限元法建立路面位移计算模型,根据FWD实测弯沉值判定地基脱空的评定方法,并编制了相关程序。通过室内试验板及试验路验证,该地基脱空评定方法是合理的,并具有较高的精度。Through analysing the first critical load under load-transfer condition and its effective factor to the correlated diflection,we draw a conclusion that using correlated deflection of first critical load under load-transfer condition as identifying criteria of foundation void is feasibe.On the basis of a numerical model calculating displacement of pavement established with finite element method and deflection data measured by falling weighting deflect meter,a method that identifying foundation void of cement concrete pavement was put forward in the paper.At the same time,the relevant programs were developed.According to application to in-house tentative concrete board and test road,the result shows the method is reasonable and reliable.

关 键 词：水泥混凝土路面 第一传荷状态临界荷载 地基脱空 对应弯沉 

分 类 号：U416.1[交通运输工程—道路与铁道工程]