Construction method for underwater deeply-buried structure

Abstract

The invention discloses a construction method for an underwater deeply-buried structure. The technological process comprises the step I of selecting proper underwater excavation equipment that can reach in waters according to the project geological exploration data; the step 2 of resurveying an underwater terrain, and designing a proper underwater excavation method and an excavation step-slope form according to design drawings and geological and hydrological data; the step 3 of performing surveying and setting out over water, and installing excavation monitoring equipment on the excavation equipment; the step 4 of performing underwater stepped excavation, and implementing necessary construction of an auxiliary construction platform after completion of excavation; the step 5 of constructingsinking cofferdam, and regulating implantation to a design attitude; the step 6 of pouring sandwich concrete and bottoming concrete of the cofferdam, and finishing cofferdam construction; and the step 7 of pumping water for dry construction of an underwater structure. According to the construction method, underwater excavation is implemented firstly, and then a water-surrounding auxiliary structure is constructed, so that dry construction environment of the structure is ensured; and the underwater construction problem of the deeply-buried structure below a complex geological riverbed can be solved in a high-quality mode quickly, efficiently and safely.

Description

technical field [0001] The invention relates to the field of civil engineering structure design and construction, specifically a method suitable for the construction of bridge underwater foundations for deep-buried caps and the design and construction of reservoir structures and power station foundations. Auxiliary structure, thereby ensuring the dry construction environment of the structure. Background technique [0002] Underwater deep-buried structures routinely use sinking caisson cofferdams as the surrounding water structure, but the design and construction of caisson cofferdams is complex, requiring underwater mud suction or underwater excavation inside the caissons, and the requirements for mud suction excavation are high , low efficiency, high difficulty in control, low construction accuracy, and the earth pressure and water pressure the caisson bears are complex and stressful. [0003] Sichuan Highway and Bridge Construction Group Co., Ltd. used chain bucket dredge...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a construction method for underwater deep-buried structures, which adopts underwater excavation first and then constructs the surrounding water auxiliary structure, so as to ensure the dry construction environment of the structure, which can be fast, efficient, safe and efficient. High-quality solutions to underwater construction problems of deep-buried structures under complex geological riverbeds

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