水利水电科技进展2025，Vol.45Issue(2)：75-81,7.DOI:10.3880/j.issn.1006-7647.2025.02.011
大直径灌注桩浇筑均匀性检测的ERT技术研究
Research on ERT method for testing concrete placement uniformity of large-diameter bored piles
摘要
Abstract
In order to explore the effectiveness of electrical resistance tomography(ERT)technology in testing the concrete placement uniformity of large-diameter bored piles,numerical simulation was conducted to optimize the key parameters of ERT sensors.A physical model test was carried out using a sensor with a diameter of 1000 mm as an example.The signal-to-noise ratio,sensitivity uniformity,and sensitivity matrix condition number,as well as the error,relative error and correlation coefficient of spatial images were used to evaluate the performance and effect of the sensor.The results show that the sensor height has a limited effect on the sensor performance,while the conductivity of electrode material has no impact on the sensor performance.There exists a complex nonlinear relationship between the electrode length,width,and sensor performance.When the height of ERT sensor is 0.8 times the diameter,the electrode is copper,and the length and width of the electrode are 1/16 and 1/32 of the circumference of the cylinder,respectively,the ERT sensor demonstrates good performance in testing the concrete placement uniformity of large-diameter bored piles.关键词
电阻层析成像技术/传感器优化设计/混凝土浇筑/灌注桩/Comsol/重建图像评价Key words
electrical resistance tomography/sensor optimization design/concrete placement/bored pile/Comsol/reconstruction image evaluation分类
建筑与水利引用本文复制引用
王梓浩,田正宏,孙啸,赵锦平..大直径灌注桩浇筑均匀性检测的ERT技术研究[J].水利水电科技进展,2025,45(2):75-81,7.基金项目
国家自然科学基金项目(51879094) （51879094）
