海底输电工程地质勘察中的声波探测技术

Acoustic Detection Technology in Geological Investigation of Submarine Transmission Engineering

海底输电工程是公认的最复杂、最困难的电网工程。地质勘察需要查清路由海域的海底地形状况、浅地层结构和物性、海底障碍物等地质信息。在海水中,因为水体剪切模量为零,不能传播横波,声波是唯一能在海水中远距离传播的能量形式。声波探测技术是目前海域探测的主要手段。该文简要介绍了单波束、多波束、侧扫声纳、浅地层剖面等几种海底输电工程常用的声波探测技术,论述了每种方法技术的适应性和使用条件以及针对海底输电工程特点进行探测的注意事项,并结合工程实例进行了论证,为海底输电工程中的勘测提供了方法和实践指导。

The submarine transmission project is recognized as the most complex and difficult power grid project,its geological survey needs to find out some geological information such as the seabed terrain conditions,shallow layer structure and physical properties,seabed obstacles and so on in this sea area. In the seawater,the shear modulus of the water body is zero,the transverse wave cannot be propagated,acoustic wave is the only form of energy that is able to spread over long distances in seawater,so the acoustic detection technology is the main means of sea area detection. This paper briefly introduces several commonly used acoustic detection techniques for submarine transmission projects,such as single beam,multi beams,side scan sonar and shallow stratigraphic section. This paper introduces the adaptability and application conditions of each method,as well as the matters needing attention for detecting amied at the characteristics of submarine transmission engineering. And combined with the engineering example to demonstration,it provides the method and practice guidance for the geophysical survey in the submarine transmission project.