摘要
为了快速准确地检测路基的压实质量,采用探地雷达对路基土的密度进行无破损连续检测。在振动压路机碾压不同遍数后,采用探地雷达在长度方向测试土的电物理性质,测定相对介电常数的模与土密度的关系,可以看出在路基碾压施工过程中相对介电常数增加。根据相对介电常数与压路机碾压遍数的关系,在碾压过程中,可以在雷达图上精确标出固定土层厚度的位置。根据固定厚度的土层反射率和密度与压路机碾压遍数的关系,可以确定土层反射率,确定土层的密度。
To examine compaction quality of a subgrade quickly and accurately,a continuous method without breakage to subgrade was used in density test of subgade soil with ground penetrating radar.After different timescompac⁃tion of the vibratory roller,the electrophysical properties along a length of section were tested with ground pen⁃etrating radar.A relation was built that between the modulus of relative permittivity of the medium and roller compaction times,the relative permittivity of the soil increased with compaction times.According to the rela⁃tion of the relative permittivity and roller compaction times,the precise location was signed on radargrams of fixed thickness layer during construction.Based on the relation of reflectivity and density of soil layer with roll⁃er passes,the reflectivity of soil layers may be determined,so the density of soil layer was gotten.
作者
赵琦
顿长朋
侯子义
ZHAO Qi;DUN Changpeng;HOU Ziyi(Tianjin Traffic and Transportation Infrastructure Maintain Group Co.Ltd.,Tianjin 300201,China;School of Civil and Transportation Engineering of Hebei University of Technology,Tianjin 300401,China)
出处
《天津建设科技》
2024年第4期45-48,共4页
Tianjin Construction Science and Technology
关键词
路基
压实质量
探地雷达
土的密度
subgrade
compaction quality
ground penetrating radar
soil density
