现在东部地区正在进行路网改造,在勘察设计时都要做桥涵调查这项工作,其中一项重要工作就是调查老路原桥涵的水文、地质及桥况资料。然而由于现场工作时间的限制以及很难找到非常了解情况的被调查人,勘察设 Now that the road network reconstruction is under way in the eastern part of the country, the investigation of the culverts and bridges should be carried out in the survey and design. One of the important tasks of this project is to investigate the hydrological, geological and bridge conditions of the old road and culvert bridges. However, due to the limitation of on-site working hours and the difficulty of finding respondents who have a good understanding of the situation,