Abstract:Most of the embankments in Shanghai are located in soft soil areas. The flood control wall of Huangpu River is affected by geological conditions, hydrological conditions, climatic conditions and human factors, which has the safety risk of structural instability. This multi-source risk mechanism also makes the identification and management of security risks have many challenges. In recent years, there have been many incidents of instability of flood control walls, which have consumed a lot of manpower and material resources, and added the considerable difficulty to the daily management of embankments. The multi-beam measurement technology, as a relatively advanced measurement method at present, can provide the intuitive data analysis for the erosion study of bridge piers, abutments and upstream and downstream flood control walls. With the popularization of this technical method, it can provide the effective technical support for the daily safety management of high-risk flood control walls in the monitoring and identification of flood control wall safety risks.