| In recent years,with the acceleration of industrialization and urbanization,the development and utilization of urban underground space in China has stepped into a stage of rapid development.In the past,urban construction was mainly plane and upward,but now it is downward development.With the improvement of production technology and quality of life,environmental problems caused by urban subway operation,especially vibration problems caused by subway,have gradually become the focus of attention.Based on a large number of research results of domestic and foreign scholars on environmental vibration induced by subway operation,this paper establishes a threedimensional finite element model of tunnel pipe gallery soil by using ANSYS finite element software,and analyzes the law of subway vibration propagation under the condition of parallel comprehensive pipe gallery and subway line.The main conclusions drawn in this article are as follows:1.When there is a situation where the integrated pipe gallery is parallel to the subway tunnel(above the side,horizontal,and below the side),compared to the situation without the integrated pipe gallery,the enlarged area of the ground Z-weighted vibration level will move about 10 m toward the far field..2.With the increase of the buried depth of the underground comprehensive pipe gallery,the corresponding main influence range gradually shifts from the near field to the far field,that is,the deep burying of the comprehensive pipe gallery is farther than the shallow burying.The Z-weighted vibration level of the field is relatively larger.3.The fastest attenuation zone under the three working conditions is different.The Z-weighted vibration level attenuation zone of the parallel working condition above the side appears in the range of 10-20 m,and the attenuation change rate is-0.431 dB/m,horizontally parallel,The fastest attenuation zone of the Z-weighted vibration level of the two parallel working conditions at the lower side appears in the range of 20～30m,and the attenuation rate of change is-0.534 dB/m and-0.327 dB/m,respectively.4.When the integrated pipe gallery is parallel to the subway tunnel,it is necessary to pay attention to the vibration of sensitive points near 10m;when the integrated pipe gallery is parallel to the subway tunnel,it is necessary to pay attention to the vibration of sensitive points near 20m;below the comprehensive pipe gallery.Parallel to the subway tunnel,it is necessary to focus on the vibration of sensitive points near 20 m and 50 m.5.The embedment of the underground comprehensive pipe gallery(above the side,level,and below the side)has the effect of increasing the propagation effect and weakening the propagation effect on subway vibration.Among them,the vibration-enhanced area is generally near the near field(5～18m,5～24m),while the vibration-weakened area is in the mid-to-far field.Near the location of the sum of the diameters of the integrated pipe gallery. |
