重力式码头沉箱接缝检测方法研究与改进

针对重力式码头沉箱安装接缝难以检测的问题,分别采用水下机器人、多波束扫测、三维声呐扫描技术进行检测。检测数据表明:水下机器人对沉箱接缝的检测效果直观、准确度较高;多波束测深系统对沉箱接缝具有一定的识别能力,但对于缝宽较小及距离较远的接缝分辨率较差;三维声呐探测扫测精度高,但扫测范围小且效率低。从测试原理上分析各种方法测试优缺点产生的原因并根据检测需求自主设计了三维声呐测量支架,实现对沉箱接缝任意深度量测,并结合工程实例取得良好的测试效果,为沉箱接缝检测方法的选取提供借鉴。

Research on and improvement of detection method for caisson joints of gravity wharf

In view of the detection difficulties of caisson joints of the gravity wharf,underwater robot,multi-beam and 3D sonar scanning technology are used to detect.Test data shows that the effect of the underwater robot is intuitive and accurate;the multi-beam system has certain recognition ability for caisson joints,but has poor resolution for the smaller-width and longer-distance joints;the scanning of 3D scanning sonar detection is highly accurate,but the scanning range is small and the scanning efficiency is low.Based on the principle of testing,we analyze the reasons of the advantages and disadvantages of various methods and designs the 3D sonar measurement bracket independently according to the testing requirements,realize the measurement of any depth of the caisson joints,and obtain a good test effect.It may serve as reference for selection of the detection method of caisson joints.