【摘要】 应用高密度电法与地质雷达开展综合物探方法研究,探测混凝土灌注桩的横向空间分布与桩顶垂直埋深等城市地下桩基地籍情况。通过模型实验比较了地下多个高阻异常体分布条件下两种物探方法各自在横向和纵向分辨率上的优势。研究了高密度电法中不同排列方式的横向分辨率,选用了横向分辨率更优的偶极排列;针对高密度电法在纵向分辨率上不够的问题,使用地质雷达圈定桩顶埋深。结果显示,应用高密度电法选取有效的排列方法在地下障碍物探测中可有效提高横向定位精度,同时采用地质雷达方法提高了纵向分辨率,两者综合最终得到一个较为精确的解释结果。更多还原

【Abstract】 High density resistivity and ground penetrating radar(GPR) method are applied to exploration of horizontal position and depth of a number of underground concrete pile foundations at an electric field in Shanghai,Based on Synthetic modeling the horizontal and vertical resolution of different method is studied when using the model of several underground high-resistivity conductors.Different arrays is also studied in order to choose the best horizontal resolution and dipole array is finally chosen because of its higher resolution.Concerning the low-resolution of high density-resistivity method,GPR method is introduced to position the top of pile foundation.The final result reveals that the horizontal resolution of high density resistivity method may become higher when using effective array,and the higher-vertical resolution with the GPR method may lead to a more precise interpretation result.更多还原