Construction method for underwater baring platform steel cover box on storm surge river mouth

Abstract

The invention is suitable for a storm surge river stretch. Underwater structural concrete for cover box construction is adopted. The construction method disclosed by the invention comprises the following steps of: (1) designing and manufacturing a cover box for later use; (2) constructing foundation filling piles, and chiseling pile heads without pulling an outer pile casing; (3) after the pile heads are chiseled, welding a lower flange and installing a shroud ring on the outer wall of an inner pile casing, measuring the central coordinates of the flange once again, drawing a lofted drawing, and pulling the outer pile casing of the filling piles; (4) after the outer pile casing is pulled, erecting supporting I steel; (5) hoisting the cover box in place; (6) after the cover box is hoisted in place, extruding an upper flanges and the lower flange to realize water stop, and draining river water in the cover box by pumping; (7) welding and sealing the upper and lower flanges; (8) performing bearing platform construction; and (9) after construction is completed, cutting the cover box off by adopting an underwater welding gun. Due to the adoption of the construction method, the problem of difficulty in underwater platform construction in a storm surge riverway is solved, and good economic and social benefits are achieved in applied engineering.

Description

[0001] technical field [0002] The invention is applicable to the underwater structural concrete (cast-in-situ pile foundation) constructed by casing in the strong tidal river section. Background technique [0003] In the construction of traditional steel casings, a construction platform is usually built above the water level during the construction period, and the casings are assembled in sections on the platform, submerged in sections, and then sealed with underwater concrete, and finally pumped. There are many procedures, and the casings are installed The construction period is long. Due to the influence of factors such as water depth and tidal surge, the concrete pouring of the underwater platform of the strong tidal estuary adopts the traditional steel casing construction method, resulting in the installation of casings having to experience the impact and damage of multiple surges, especially in August and September. During the flood season, it is a difficult problem ...

AI Technical Summary

Problems solved by technology

[0003] In the construction of traditional steel casings, a construction platform is generally built above the water level during the construction period, and the casings are assembled in sections on the platform, submerged in sections, then sealed with underwater concrete, and finally pumped. There are many procedures, and the casings are installed Long construction period

Due to the influence of factors such as water depth and tidal surge, the concrete pouring of the underwater cap platform of the strong tidal estuary adopts the traditional steel box construction method, resulting in the installation of the box having to experience the impact and damage of many surges, especially in August and September. During the flood season, it is a difficult problem that construction companies often face

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