Use of Fwd Deflection Basin Parameters (SCI, BDI, BCI) for Pavement Condition Assessment
Use of Fwd Deflection Basin Parameters (SCI, BDI, BCI) for Pavement Condition Assessment
复制标题
DOI：
10.3846/1822-427x.2009.4.196-202
复制
发表时间：
2009-12
影响因子：
1.1
通讯作者：
O. Talvik;A. Aavik
中科院分区：
文献类型：
--
作者：
O. Talvik;A. Aavik
本文研究了降重挠度计（FWD）挠度盆参数与路面结构状态指标（如路面低承载力引起的疲劳开裂和永久变形）和路面等效E模量（Eeq）之间的关系。研究的主要目的是建立挠度盆地参数的极限值：表面曲率指数（SCI）、基底损伤指数（BDI）和基底曲率指数（BCI）。作者对爱沙尼亚道路数据库数据的分析反驳了偏转盆地参数与路面缺陷或车辙之间关系的假设。挠度盆地参数与反演Eeq具有较好的相关性。上层指标（SCI和BDI）与Eeq之间存在较强的相关性。研究发现，路基指标BCI与Eeq之间的关系不是很强。基于上述关系和特定路面所需的最小等效模量，建立了确定不同类型路面挠度盆参数极限值的方程。作者最后警告说，这是爱沙尼亚第一次对如此广泛的数据库进行统计分析，因此必须在实践中评价确定的极限值，并在必要时随后加以纠正。
This article report on a study that investigated the relationship between falling weight deflectometer (FWD) deflection basin parameters and road pavement structural condition indicators, such as fatigue cracking and permanent deformations induced by low bearing capacity of pavement, and pavement equivalent E modulus (Eeq). The primary aim of the research was to develop limit values for deflection basin parameters: surface curvature index (SCI), base damage index (BDI) and base curvature index (BCI). The authors' analyses of data derived from the Estonian Road Databank disproved the hypothesis of relationship between deflection basin parameters and pavement defects or rutting. Deflection basin parameters and back-calculated Eeq were found to be in good correlation. Strong relationships were found between upper layers indicators (SCI and BDI) and Eeq. Relationship between subgrade indicator BCI and Eeq, found in the research, was not very strong. Based on the aforementioned relationships, and the required min equivalent modulus of particular pavement, the equations to determine the limit values of deflection basin parameters for different types of pavements were developed. The authors conclude by cautioning that this is the first time that these statistical analyses of such an extensive database have been in Estonia, so the determined limit values have to be evaluated in practice and, if necessary, subsequently corrected.