勘察资料一般是根据勘探孔取得的数据进行编制的,由于勘探孔之间的土层变化规律难以准确掌握,特别是在枣庄的旧城区,由于历史的原因,存在着很多废弃的中小型煤井、砖窑、焦池、防空洞、枯井以及旧河床,另外,当基槽开挖后,槽底及槽帮土层分布情况也是勘探时难以判断的,因此在基槽开挖后基础施工之前必须进行验槽,验槽包括观察验槽,现场土质鉴别,钎探结果分析等。由于验槽属于隐蔽工程,建筑物建成后不可能再见到,而一旦出现问题,日后的加固补救很难进行, Survey data are generally compiled based on the data obtained from exploration holes. It is difficult to accurately determine the soil change rules between exploration holes, especially in the old urban area of ​​Zaozhuang. Due to historical reasons, there are many abandoned small and medium-sized coal wells. , Kilns, coke ponds, air-raid shelters, dry wells, and old riverbeds. In addition, when the foundation trenches are excavated, the distribution of the bottoms of the trenches and the soil layers in the trenches is difficult to judge during exploration. Therefore, it must be performed before the foundation construction after excavation of the foundation trenches. The trough, the trough, including the observation trough, on-site soil identification, analysis of the results of the exploration and so on. Since the inspection tank is a concealed project, it is impossible to see it again after the building is completed. Once problems arise, it will be difficult to carry out future reinforcements.