低应变动力试桩-桩完整性检测（坑）

Low Strain Pile Integrity Testing is a quick and cost effective method to evaluate the shaft integrity of concrete piles. 低应变基桩完整性检测 是一个快速和具成本效益的方法来评价井的完整性，混凝土桩。 The testing is able to provide information on: 测试是能够提供下列信息：

a.) pile continuity 甲）桩连续性
b.) consistency of material 乙）的一致性材料
c.) location of defect 丙）位置的缺陷
d.) degree of defect 四）程度的缺陷

The test method is performed with a hand held hammer, a sensitive accelerometer and the Pile Integrity Tester . 试验方法是演出与手持锤子，一个敏感的加速度和基桩完整性测试仪 。

The accelerometer is attached to the top of the pile, and then a compressive wave is generated by tapping the pile head with a hammer. 加速度是附着在顶部的桩柱，然后压缩波是由挖掘桩头部锤子。 When the downward compression wave encounters a change in cross section or in concrete quality, it generates an upward tension wave that is later observed at the pile top. 当向下压缩波相遇改变截面或在混凝土质量，它产生向上张力波说，是后来观察到在桩顶。

The velocity recorded along with the subsequent reflections from the pile toe or pile discontinuities are graphically displayed. 速度记录随其后的思考，从桩脚或桩的不连续性，是生动地显示出来。

The effectiveness of the system is limited to a pile length not exceeding 30 to 60 pile diameters depending on soil condition and concrete quality. 制度的有效性是有限的，一桩长度不超过30至60桩直径根据土壤条件和混凝土质量。