Underwater rock-socketed concrete pile and construction method thereof

Abstract

The invention discloses an underwater rock-socketed concrete pile. The underwater rock-socketed concrete pile comprises a steel pipe pile and a cast-in-place concrete pile, wherein the bottom of the steel pipe pile is inserted into the top face of bed rock, the outer wall of the steel pipe pile is provided with a female and male locking opening, a reinforcement cage is arranged inside the steel pipe pile, the cast-in-place concrete pile is formed inside the steel pipe pile and at the position of a bed rock drilled hole below the steel pipe pile by pouring underwater concrete, the steel pipe pile, the reinforcement cage, the cast-in-place concrete pile and the bed rock are integrally formed, the invention further discloses a steel cofferdam structure, the invention further discloses a construction method of the underwater rock-socketed concrete pile, and the invention further discloses a construction method of the steel cofferdam structure. According to the underwater rock-socketed concrete pile and the construction method thereof, under the conditions that a reservoir cannot be emptied and the water level of a reservoir area is high, the stability of the steel pipe pile driven into deep water is improved, and the problem that the pipe pile topples over due to the fact that the peripheral water pressure is larger during dewatering in a foundation pit is well solved, and meanwhile the problems that dam foundation rock is hard and the pipe pile is difficult to drive in are solved.

Description

technical field [0001] The invention relates to the field of steel cofferdam construction in wading engineering. More specifically, the present invention relates to an underwater rock-socketed concrete pile and its construction method. Background technique [0002] At present, many large and medium-sized reservoirs built in the last century in China have entered the state of dangerous reservoirs and need to be comprehensively strengthened. Usually, the reservoir reinforcement project adopts the way of emptying the reservoir area and diverting the flow of the full-section cofferdam. Since the reservoir has been in operation for many years and the bottom of the reservoir is seriously silted, if the conventional method is used, the silt at the bottom of the reservoir will be discharged with the water flow, causing damage to the downstream river. ecological impact. Therefore, we must carry out the reinforcement construction of the reservoir when the reservoir cannot be emptied...

AI Technical Summary

Problems solved by technology

[0005] Another object of the present invention is to provide an underwater rock-socketed concrete pile and its construction method, which can improve the stability of steel pipe piles driven into deep water when the reservoir cannot be emptied and the water level in the reservoir area is high. It solves the problem of pipe piles toppling due to high peripheral water pressure when dewatering in the foundation pit, and also solves the problem that the dam foundation rock is hard and the pipe piles are difficult to drive into

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