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混凝士桩的质量检验主要是断桩的检测,目前普遍采用的动测法主要有两种,振动法和应力波法。振动法的基本原理是,用人工振源——机械偏心式起振机或电磁式激振器或火箭筒定向爆破(反推力),使桩进行强迫振动,然后从振动记录的波形、振幅以及由频率分析得到的固有频率或由考虑部分土体质量的经验公式算得的析算刚度等参量进行统计对比,在同批桩中相对地评价桩的质量(缺陷或断桩)。应力波法则是根据弹
The quality inspection of concrete piles is mainly the detection of broken piles. At present, there are mainly two kinds of dynamic measurement methods, vibration method and stress wave method. The basic principle of the vibration method is to use an artificial vibration source—a mechanical eccentric vibrator or an electromagnetic vibrator or a bolometric blasting (reverse thrust) to make the pile perform forced vibration, then record the waveform, amplitude and The natural frequencies obtained from the frequency analysis are statistically compared with those calculated from empirical formulas that consider part of the soil mass, and the pile quality (defects or broken piles) is relatively evaluated in the same batch of piles. Stress wave law is based on