Karst cave positioning method in pile foundation punching construction process

The invention discloses a karst cave positioning method in the pile foundation punching construction process. The karst cave positioning method comprises the steps that the standard slurry flow of a slurry opening is obtained; whether a karst cave exists in the pile hole or not is judged based on the reference slurry flow; and based on the judgment result, the karst cave in the pile hole is positioned. According to the technical scheme, the position of the karst cave opening can be judged only by installing the flow velocity measuring device at the karst cave opening to monitor the descending speed of the slurry liquid level, the size of the karst cave opening can be calculated through the calculation method, and the karst cave in the pile foundation construction process can be treated conveniently in the next step. 本发明公开了桩基冲孔施工过程中溶洞定位方法，包括：获取浆口的基准泥浆流量；基于所述基准泥浆流量，判断桩孔内是否有溶洞；基于判断结果，对所述桩孔内的溶洞进行定位。本发明技术方案，仅需要在溶洞口处安装流速测量装置监测泥浆液面下降速度即可判断溶洞口的位置，并且能通过本专利计算方法计算出溶洞口的大小，便于下一步对桩基施工过程中的溶洞进行处治。