关于冲孔桩施工的地面振动效应的研究

摘要

In order to control the vibration effect of the punched pile construction ,the surface vibration near the construction site was measured in the construction ,and the rationality of test results was an-alyzed by the Reinda criterion.Meanwhile ,the fitting formula of the maximum vertical displacement on the ground is derived according to dimension analysis.The finite element model was established with ABAQUS software and verified by compared with the test results.Then ,the attenuation law of the ground vibrations in different depth of the pile was investigated with the finite element model and compared with the results of the fitting formula.The results show that the finite element calculation values have a good consistency with the fitting results.%为了控制某桥梁桩基施工的振动效应,在施工时,对桩基附近的地表的振动进行了实测,并基于莱茵达(PanTa)准则对测试结果的合理性进行了分析,同时给出了基于量纲分析的地表最大垂向位移的拟合公式.采用ABAQUS有限元软件建立了研究对象的有限元模型,通过与实测结果的对比,验证了该问题的有限模型的可靠性.对不同打桩深度的情况进行了有限元模拟,并将有限元计算值与拟合公式计算值进行比较.结果表明,有限元计算值与拟合公式计算值具有良好的一致性.