Pipe pile foundation for static-pressure grouting on pile side and rotary jet grouting at pile bottom and construction method thereof

Abstract

The invention discloses a pipe pile foundation for static-pressure grouting on a pile side and high-pressure rotary jet grouting at a pile bottom and a construction method of the pipe pile foundation. The pipe pile foundation comprises a prestressed concrete pipe pile, a reinforced graphite packing sealing gasket, a pile shoe and a pile bottom high-pressure rotary jet grouting reinforcing body, wherein a grouting pipe is embedded in a pile body of the prestressed concrete pipe pile, and the prestressed concrete pipe pile is connected with and seals the grouting pipe embedded in the pile body corresponding to an upper-section pipe pile and a lower-section pipe pile through a reinforced graphite packing sealing gasket; the pile shoe is connected with the lower end of the lowest-section pipe pile of the pipe pile foundation; the grouting pipe embedded in the pile body is reasonably provided with stock outlets in the connection position of the pipe pile and the pile shoe and the connection position of the upper-section pipe pile and the lower-section pipe pile; and one end of the grouting pipe embedded in the pile body is connected to a high-pressure grouting pump. The pipe pile foundation for static-pressure grouting on the pile side and high-pressure rotary jet grouting at the pile bottom and the construction method thereof, provided by the invention, are especially suitable for filed construction of prestressed concrete pipe pile foundations with poorer geological conditions and deep bed rock embedment, and can effectively reduce the length of a pipe pile, and meanwhile the bearing capacity of the pipe pile foundation is ensured, and thus the construction method is simple and reliable.

Description

technical field [0001] The invention relates to a pipe pile construction method in the field of pile foundations, which belongs to the technical field of traffic and civil engineering, in particular to a pipe pile foundation for static pressure grouting at the pile side and high pressure rotary jet grouting at the bottom of the pile and its construction method . Background technique [0002] Follow-up pipe pile while drilling (CN2007100290235) is a new type of pile, which combines the advantages of manual excavation piles, drilled (punched) hole piles, and prestressed pipe piles. It has strong adaptability to geological conditions, fast construction speed, and reliable quality. , Less material consumption, high pile bearing capacity, mechanized operation, no construction mud discharge problem, and environmental protection. One of the advantages of this pile type is that it can be embedded in the bedrock, give full play to the resistance of the pile end, and greatly improve ...

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Problems solved by technology

[0004] However, there is still a need for further improvement of the prior art pipe pile foundation while drilling and its construction technology.

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