Mechanical Vibration Application Under the Influence of Microtremor Survey Technology in Loess Filling Foundation Investigation

In order to analyze the application of microtremor array profile method in loess fill foundation investigation under the influence of mechanical vibration, a metal smelting plant in northwest loess fill site was taken as an example. Under the influence of background noise generated by normal operation of machinery in the plant area, multiple coverage linear microtremor array profile method was used to detect the site, drilling was conducted at some points, and rock samples and microtremor detection results were combined to analyze the geological interpretation of the foundation. At the same time, drill again in the geological anomaly area of micro motion detection to verify the geological interpretation and inference results. The results are as follows. The data are collected by multiple coverage linear micro-array profile method, and processed by SPAC method combined with the seismic exploration of stripping inversion method, which can effectively reduce the influence of the background noise caused by mechanical vibration. This method is suitable for the investigation of loess fill foundation under the influence of mechanical vibration background noise. The shear wave velocity of the floury soil in the original foundation will decrease obviously in the water-rich condition. The micro-motion detection technology can be used to detect the water-rich area of the loess filling site in northwest China.