水域走航式地震发射波法的应用研究

Technical study and application on the method of marine underway seismic reflection

水域地震反射波法在工程勘察中的应用日益重要。相对于陆地地震反射波法,水域地震反射法具有地表一致性好的优点,一般无需作静校正处理。但水域地震反射波法存在多次波发育强、水域拖缆船抛锚定位难、外业数据采集费时费力等缺点。为此,本文从技术方法选择、震源改进及叠加方法三方面对水域地震反射波法进行探讨和改进,以克服上述问题,取得了较好的应用效果。

The application of the marine underway seismic reflection in engineering exploration becomes more and more import.Relative to the land reflection method,the marine underway seismic reflection has the advantage of the surface consistency,and the static correction is needed.But the marine reflection method is of some faults such as the more multiple reflection waves,more difficulty on dropping anchor position,wasting time and energy in field work.In order to incoming the above mentioned faults,the author has discussed and improved the marine reflection method in the choice of technique,the improvement of the seismic sources and the stacking method.The project example shows that the improved method is more effective in the shallow marine geotechnical investigation.