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分析了地震波法检测水泥混凝土路面脱空的基本原理。借助IDTS3850振动测试仪,进行了室内混凝土脱空板振动模拟试验,记录与分析了室内不同脱空状态下水泥混凝土路面板的微地震波,初步获得了室内模拟水泥混凝土路面板在不同脱空状态下的振动特性规律。结果表明:室内板底脱空程度越严重,板体振动系统受到激励作用时产生的自然频率越低,振动时间越长,振幅则越大。
The basic principle of seismic wave method for detecting the emptying of cement concrete pavement is analyzed. With the IDTS3850 vibration tester, the vibration simulation test of the concrete slab was carried out. The seismic wave of the concrete slab under different void conditions was recorded and analyzed. The simulation results of indoor simulated concrete slab under different conditions The vibration characteristics of the law. The results show that the more serious the vacancy of the indoor bottom is, the lower the natural frequency is when the vibration system is excited. The longer the vibration time is, the larger the amplitude is.