Steel cofferdam caulking treatment method in sea-crossing bridge construction process

Abstract

The invention belongs to the related technical field of bridge construction, and discloses a steel cofferdam caulking treatment method in the sea-crossing bridge building process. The steel cofferdam caulking treatment method in the sea-crossing bridge building process comprises the steps of welding a female lock catch and a male lock catch on a steel pipe pile main body correspondingly, and processing the outer end of the female lock catch into a tip shape; arranging a viscous elastomer waterproof slurry layer on the inner wall of the female lock catch in a mold pouring mode; conducting pile sinking operation to form steel pipe pile cofferdams connected end to end in series; and conducting concrete bottom sealing operation on a foundation pit, and meanwhile conducting blocking treatment on other possible leakage. According to the steel cofferdam caulking treatment method in the sea-crossing bridge building process, the water stopping effect of the steel pipe pile cofferdams can be remarkably improved, quality control and high-efficiency technological operation are facilitated, and therefore the caulking and water stopping requirements of the cofferdams in the sea-crossing bridge building process can be better met.

Description

technical field [0001] The invention belongs to the technical field related to bridge construction, and more specifically relates to a method for caulking steel cofferdams in the construction process of cross-sea bridges. Background technique [0002] As a temporary protection structure widely used in bridge foundation construction, cofferdams currently include earth-rock cofferdams, double-wall steel casing cofferdams, steel sheet pile cofferdams, steel pipe pile cofferdams, reinforced concrete caissons, etc. . Among them, the steel pipe pile cofferdam has received more and more attention in recent years due to its stable structure, strong adaptability, and high recovery rate. [0003] The water-stop effect of the steel pipe pile cofferdam directly affects the efficiency and even the project quality of the cap platform construction. Most of the existing steel pipe pile cofferdams are connected by CT-shaped locks. In order to ensure the water-stop effect, the conventional ...

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Problems solved by technology

[0005] However, further studies have shown that for construction scenarios such as bay tidal flat areas, they usually have the characteristics of abundant groundwater and obvious fluctuations in tidal water. In addition, as the buried depth increases, the lower water pressure is extremely high, and the protection structure of the foundation pit is getting deeper and deeper. The more difficult it is to block waterproofing at the bottom, the rubber strips grouted or filled in the above method will often be washed away by the water flow, the practicability is still not ideal and there are problems that the process is difficult to control

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