Methods, requirements and characteristics of underwater foundation construction

This is more complicated: 1. Compare the difficulty of underwater foundation construction and land construction. Obviously, compared with land, it is a word "water". After foundation excavation, there may or may not be water after foundation excavation, but it can be pumped clean. But in underwater construction, there is water, and the size, speed and depth of water flow determine the difficulty of foundation pit excavation. Generally, there is 1, and the water flow can be cleaned by direct excavation. 2. The water depth1~ 2m can be controlled by cofferdam and pumping. 3. The water is deep and the foundation is basically underwater, so there is only a steel cofferdam. 2。 Construction methods and requirements of underwater foundation. The concrete construction method mainly depends on water depth, water flow, water inflow and foundation buried depth. Methods have been mentioned in 1, and these methods are all anyway. The requirement is (1) that no matter which method is adopted, the water in the foundation pit should be as little as possible and cannot be reduced, and the underwater back cover should be carried out in blocks and layers. Make sure that the back cover is in place once. (2) In order to ensure the quality of concrete, the grade of concrete can be improved appropriately, and the appropriate water-cement ratio and vibrating frequency should be considered. 3. There are too many technical schemes and industry characteristics of underwater foundation construction, and it takes too much time to write. I'd like to introduce you to Tianyuan Local Architecture Forum. Find one, many of them are free.