To study the application value of a new type of hollow pipe barriers in engineering isolation and analyze its influencing factors,a finite element model was established based on the Plaxis 3D software according to the existing model and field test parameters.The model was validated using original test data,and then simulated calculations were performed on the verified finite element model.Based on finite element numerical analysis methods,the isolation effect of the new hol-low pipe was compared with the barrier used in the original model and field trials.Also,the impact of the height of a single hollow pipe and the number of hollow pipes on the isolation effect of the new hollow pipe was analyzed.The results show that the average damping coefficient of the hollow pipe is much smaller than that of the filling trench,row of pile,and wave impeding blocks.The deviation between their average damping coefficients can reach up to 373%,while the deviation of the average damping coefficient between the new hollow pipe and the empty trench is relatively small.It indicates that the isolation effect of the new hollow pipe is significantly better than that of the filling trench,row of piles,and wave impeding blocks,but is close to the isolation effect of the empty trench.In addition,it is found that under different engineering condi-tions,the average damping coefficients of the new hollow pipe barriers is mostly below 0.3,so they have a good isolation ef-fect.As the number of hollow pipes increases,the isolation effect of the barrier also improves.Adjusting the height of a sin-gle hollow pipe has little influence on the isolation effect of the barrier when the height of the other hollow pipes remains un-changing.
关键词
振动与波/水平空心管/空沟/排桩/隔振效果对比
Key words
vibration and wave/horizontal hollow pipe/open trench/row of piles/comparison of vibration isolation ef-fect
维普
万方数据