The foundation pit adopts drilled cast-in-place piles and internal supports as the retaining structure of the pit.
Except for the first steel support directly supported on the top beam of the pile, the rest are equipped with steel cofferdams.
The corner of the pile foundation and the external support of the variable cross-section are inclined, while the rest are provided with opposite supports.
In order to facilitate construction, the steel pipe is required to avoid the central column of the main structure while meeting the spacing requirements.
At the same time, in order to ensure that the slant support is stressed, a triangular building block is set on the steel fence at the corresponding position of the slant support to ensure that the stress surface is orthogonal to the inclined plane.
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