Fixing device of acceleration sensor in axial hole of pile body, detecting device and detecting method

The invention discloses a fixing device of an acceleration sensor in an axial hole of a pile body, a detecting device and a detecting method, and belongs to the technical field of pile foundation test. The fixing device comprises a driving mechanism and a quadrilateral telescopic mechanism, and ensures that the acceleration sensor is tightly fixed on the axial hole wall of the pile body by utilizing the principle that a quadrilateral support rod expands and contracts to support the hole wall and can also meet the requirement of moving in the pile body. The fixing device is simple in operationprinciple and simple and convenient in installation mode, and can be widely applied to stress wave integrity detection when a deep defective pile section is tested. 本发明公开了一种桩身轴向孔中加速度传感器的固定装置、检测装置及方法，属于桩基测试技术领域。该装置包括驱动机构和四边形伸缩机构，利用四边形撑杆张开和收缩支撑孔壁的原理，来保证加速度传感器被紧密地固定在桩身轴向孔壁上，并可实现在桩身内移动的要求。本发明装置操作原理简单，安装方式简易方便，可广泛应用于测试缺陷桩段较深时的应力波完整性检测。