Foundation pile low-strain detection stress wave travel time correction method

• Main Authors: ZHANG QITAO, YIN ZHONGNAN, CHAI LU, CHENG SILEI, LIU ZHUQING, LI CHAOSHENG, MAO YONGQIANG
• Format: Patent
• Language: Chinese; English
• Published: 10.09.2021
• Subjects: EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; SOIL SHIFTING; TESTING; UNDERGROUND OR UNDERWATER STRUCTURES

The invention discloses a foundation pile low-strain detection stress wave travel time correction method. The method comprises the steps of: selecting any position of a pile top as an excitation point; selecting two measuring points with different distances from the excitation point as sensor mounting points which are respectively used for mounting a sensor 1 and a sensor 2; using a vibration excitation hammer for knocking on the vibration excitation point, and performing signal acquisition synchronously through the sensor 1 and the sensor 2; and correcting the first arrival time of the first wave of the stress wave and the travel time of the stress wave propagating in the pile body based on signals acquired by the sensor 1 and the sensor 2, so that the integrity of the foundation pile is accurately analyzed. 本发明公开一种基桩低应变检测应力波走时校正方法，包括：选择桩顶的任一位置作为激振点；选择与激振点间距不同的两个测点作为传感器安装点，分别用于安装传感器1和传感器2；用激振锤在激振点上进行敲击，通过传感器1和传感器2同步进行信号采集；基于传感器1和传感器2采集的信号对应力波首波初至时间及其在桩身中传播的走时进行校正，从而准确地对基桩完整性进行分析。