Method for judging whether screw pile enters bearing stratum or not

The invention provides a method for judging whether a screw pile enters a bearing stratum or not, which comprises the following steps of: installing a torque sensor at the joint of a power head and a screw of a spiral drilling machine, and monitoring the torque borne by the screw in the drilling process in real time to obtain a relation curve of the torque and the depth; and judging whether the pile end reaches the bearing stratum or not in the drilling process of the screw pile according to the change characteristics of the relation curve. According to the method, whether the pile end reaches the bearing layer or not in the construction process of the screw pile can be judged timely, accurately and visually, the foundation reinforcement treatment quality is guaranteed, the construction progress is accelerated, the bearing capacity of the screw pile is guaranteed, meanwhile, the length of the pile is effectively controlled, and cost is reduced. 本发明提供一种螺钉桩是否进入持力层的判定方法，所述方法包括在螺旋钻机动力头和螺杆交接处安装扭矩传感器，实时监测螺杆钻入过程中受到的