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Dynamic control of vibration during construction
Topic Started: Feb 15 2017, 01:58 AM (4 Views)
meishengchao
Hokage
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The vibration isolation effect of the dam is more significant, and the vibration isolation effect is better. However, when the isolation groove reaches a certain depth, the vibration damping effect is not obvious, and the stability of the side wall of the trench is difficult to guarantee. That is, there is a critical groove depth, groove depth is greater than the value, the vibration isolation effect can not increase with the depth of the groove and significantly improved. The width of the damper does not substantially affect the vibration isolation effect. In fact, a small crack or fissure will be enough to shield most of the elastic waves. Therefore, it is not great to increase the width of the vibration isolation groove to improve the vibration isolation effect.
The addition of different materials to the vibrating grooves also affects the transmission of vibratory wave velocities of strong earthquakes. It is found that the elastic modulus of the filling material in the ditch is larger than that of the elastic modulus of the soil. The better the vibration isolation effect is, the rubber, steel spring, latex sponge, cork, felt and air spring are recommended in the project. Elasticity modulus is relatively small before the old as a groove ditch filler, can play a vibration isolation effect.
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