The dangerous situation of Tuanzhou Embankment in Huarong County, Dongting Lake has touched the hearts of the people all over the country. The Hunan Provincial Party Committee made an emergency deployment at the first time, and carried out rescue and rescue in a dual way, minimizing the more serious loss of people's lives and property. However, the use of construction methods and equipment for the repair and treatment of infrastructure cofferdams such as the Dongting Lake water network has attracted more attention and thinking from industry insiders, as it can better ensure the long-term stability of the dam.
There are many methods and equipment for cofferdam seepage prevention and reinforcement construction of rivers, lakes, reservoirs, etc. in plain areas, and the following are commonly used:
One is to use hydraulic wall grab buckets to form grooves and then pour concrete for anti-seepage reinforcement;
The second is to use high-pressure rotary spray reinforcement and add polyethylene geomembrane for anti-seepage;
The third method is to use CSM deep mixing method to mix concrete with certain parameters and the original soil of the dam foundation to form a wall, and to complete anti-seepage reinforcement in one go;
The fourth is the TRD method, similar to the CSM deep mixing method, which can also achieve comprehensive completion of anti-seepage reinforcement.
Each of these construction methods has its own advantages. When choosing a construction method and equipment, it is necessary to consider both the applicability requirements of the engineering and geological conditions, as well as the efficiency and economy of the construction.
The CSM construction method products of Shanghai Jintai were born in 2010 due to the South to North Water Diversion Xinglong Reservoir Project. Since then, they have been continuously promoted and applied in various fields across the country, such as reservoir cofferdam reinforcement, underground pollution control, urban foundation pit waterproofing curtains, and reinforcement of large bridge anchorage foundation pit groove walls. In 2018, it won the second prize of National Science and Technology Progress Award (this construction method and equipment technology have solved the problem of deep groundwater control faced by the development of deep underground spaces under complex geological and sensitive urban environmental conditions, and are applicable to engineering fields such as water conservancy anti-seepage, landfill pollutant isolation, and deep and thick soft soil foundation treatment. The main achievements have reached the international leading level - National Science and Technology Progress Award candidate project evaluation report). In 2023, it was included in the "2023 Key Promotion and Guidance Catalog of Advanced Practical Water Conservancy Technologies" by the Ministry of Water Resources and recognized as a practical advanced water conservancy technology by the Ministry of Water Resources.
