Secondary bottom sealing structure of open caisson and construction method
A construction method and bottom sealing technology, which are applied in basic structure engineering, caisson, construction, etc., can solve the problems of complex bottom sealing construction, difficult adjustment of the subsidence process, and construction quality easily affected by the bottom hole environment, etc., and achieve the effect of ensuring quality.
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[0025] Example: A secondary bottom sealing structure for caisson, such as figure 1 Shown. The device includes a shell 1 and an inner liner 3 buried below the ground. The shell is a straight cylinder with upper and lower openings, and a blade foot 2 is provided at the bottom of the shell. The inner liner is cylindrical, the outer side wall of the inner liner has the same shape with the inner wall of the outer shell, and there is a gap. The top of the liner is open, and the bottom is provided with a bottom plate 4, and the bottom plate is provided with mud holes. The mud holes 5 are closed after sinking to the bottom of the liner. The gap between the outer shell and the inner liner is grouted and consolidated to form a consolidated layer 6.
[0026] A construction method for the secondary sealing structure of the caisson, such as Figure 2-5 Shown. It includes the following steps:
[0027] a. The shell sinks to the design elevation;
[0028] b. The inner tank sinks to the design el...
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