摘要
传统机场路基压实度检测存在耗时长、破坏性大等问题,压实质量往往难以得到有效评价。为实现机场路基压实质量快速无损检测,本文通过构建压实度与动态变形模量的相关关系,利用EVD(Dynamic Deformation Modulus)检测技术对压实质量进行快速无损检测,并分析不同碾压遍数以及不同碾压位置的动态变形模量E_(vd)的分布差异性。本文以某通用机场飞行区扩建项目部分机场路基施工段为例,结果表明:(1)利用检测点E_(vd)进行压实度表征是可行的;(2)同一碾压遍数的不同位置压实质量存在一定差异,其碾压施工长度方向比宽度方向不均匀性大;(3)随着碾压遍数的增加,非薄弱区E_(vd)随之增大,薄弱区E_(vd)越来越小,可通过EVD检测及时对潜在薄弱区域进行识别并采取换填措施。研究结果可为现场压实质量快速无损检测提供一定参考。
Traditional runway subgrade compaction detection has problems such as long time-consuming and high destructiveness,and the quality of compaction is often difficult to evaluate effectively.In order to achieve rapid non-destructive testing of the compaction quality of runway roadbeds,this paper constructs the correlation between compaction degree and dynamic deformation modulus,uses EVD(Dynamic Deformation Modulus)testing technology to conduct rapid non-destructive testing of compaction quality,and analyzes different rolling passes and differences distribution of location of dynamic deformation modulus(E_(vd)).The results show that:(1)it is feasible to use the E_(vd) of the detection point to characterize compaction degree;(2)there is a certain difference in the compaction quality at different positions of the same rolling pass,and the length direction of rolling construction is more uneven than the width direction;(3)as the number of rolling passes increases,the E_(vd) of the non-weak area increases,and the E_(vd) of the weak area becomes smaller and smaller.The potential weak area can be identified in time through EVD detection technology and replacement measures can be taken.It provides a certain reference for the rapid non-destructive testing of on-site compaction quality.
作者
程利力
周诚
张勇
肖小进
陈嘉锡
CHENG Lili;ZHOU Cheng;ZHANG Yong;XIAO Xiaojin;CHEN Jiaxi(School of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Wuhan Municipal Construction Group Co Ltd,Wuhan 430023,China)
出处
《土木工程与管理学报》
2021年第6期158-162,共5页
Journal of Civil Engineering and Management
基金
国家自然科学基金(72171092)
湖北省自然科学杰出青年基金(2021CFA091)
湖北省重大科技专项(2020ACA006)。
关键词
机场路基
快速无损检测
EVD
碾压遍数
不均匀性
runway subgrade
rapid non-destructive testing
EVD
rolling passes
unevenness
