摘要
常规压实度检测耗时长且采用有限点式抽样,无法对施工场地进行较全面质量评价,可能会导致部分薄弱区域未及时发现而产生施工质量问题。为实现机场路基压实质量快速无损检测,以某机场飞行区扩建项目路基施工试验段为例,构建了压实度与地质雷达相对介电常数的相关关系,并分析不同碾压遍数及不同位置相对介电常数分布情况。结果表明,试验段相对介电常数与压实度存在较好的相关关系,可利用地质雷达对压实质量进行有效检测;随着碾压遍数增加,级配碎石相对介电常数随之增大;该试验段碾压完成后压实质量基本满足设计规范要求,但不同位置仍存在一定的不均匀性。
The conventional compactness testing takes a long time and adopts the finite point sampling experiment,so it is impossible to make a more comprehensive quality evaluation of the construction site,and may lead to construction quality problems in some weak areas that are not found in time.In order to realize the rapid nondestructive testing of the compaction quality of the airport subgrade,taking the experimental section of the subgrade construction of an airport airfield expansion project as an example,the correlation between the compactness and the relative dielectric constant of the ground penetrating radar is established,and the relative dielectric constant distribution of different rolling passes and different positions is analyzed.The results show that,there is a good correlation between the relative dielectric constant and the compactness in the experimental section,and the compaction quality can be effectively detected by ground penetrating radar.With the increase of the number of rolling passes,the relative dielectric constant of graded macadam increases gradually.After the completion of rolling in this experimental section,the compaction quality basically meets the requirements of the design specifications,but there are still some unevenness in different positions.
作者
程利力
周诚
张勇
卢吉
武春峰
CHENG Lili;ZHOU Cheng;ZHANG Yong;LU Ji;WU Chunfeng(School of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan,Hubei 430074,China;Wuhan Municipal Construction Group Co.,Ltd.,Wuhan,Hubei 430023,China)
出处
《施工技术（中英文）》
CAS
2021年第14期98-101,137,共5页
Construction Technology
基金
湖北省重大科技专项:智能建造关键技术及应用(2020ACA006)。
关键词
机场
路基
地质雷达
无损检测
压实度
相对介电常数
airports
subgrade
ground penetrating radar
nondestructive testing
compactness
relative dielectric constant
