Anti-pulling type pipe pile and construction process thereof

Abstract

The invention discloses an anti-pulling type pipe pile and a construction process thereof, and belongs to the technical field of concrete pipe piles. The anti-pulling type pipe pile comprises a pipe pile body, connecting end plates and a high-pressure grouting device, wherein the pipe pile body comprises a pile main body manufactured by adopting a pre-tensioning method pre-stress process and a centrifugal forming method, and a pile main body inner cavity defined by the pile main body; a steel reinforcement cage woven by steel bars is arranged in the pile main body inner cavity; a first grouting pipe and a second grouting pipe are embedded in the two opposite side end surfaces in the pile main body correspondingly and penetrate through the whole pile main body; a plurality of grouting holes are formed in the outer wall of the pipe pile body and communicate with the first grouting pipe and the second grouting pipe; the connecting end plates are arranged at the joints of an upper pipe pile and a lower pipe pile correspondingly and are of mortise and tenon structures; the high-pressure grouting device comprises a high-pressure grouting machine and a high-pressure grouting pipe; the high-pressure grouting pipe is arranged on the high-pressure grouting machine; and sealing devices are arranged at the two ends of a grout outlet of the high-pressure grouting pipe. According to the anti-pulling type pipe pile and the construction process thereof, local grouting of key positions can be realized, and the anti-pulling bearing capacity of the pipe pile can be improved.

Description

technical field [0001] The invention relates to the technical field of concrete pipe piles, in particular to a pullout-resistant pipe pile and a construction process thereof. Background technique [0002] With the development of the economy, the number of high-rise buildings in cities is increasing year by year. During the construction of high-rise buildings, when the geological structure with soft soil is encountered, the bearing capacity of the foundation is small, and the buildings are easy to sink. At this time, it is necessary to drive the pipe pile into the soil layer in advance. Among them, the side resistance and end resistance of pipe piles bear the upper load together, thereby improving the bearing capacity of the foundation. Especially in coastal soft soil areas, pipe piles are widely used in various engineering piles and foundation pit enclosure piles. With the expansion of the application field of pipe piles, the requirements for the application of pipe piles ar...

AI Technical Summary

Problems solved by technology

At the same time, for piled raft foundations in basements with shallow groundwater levels, if pipe piles are used, they need to have a higher uplift bearing capacity. The existing traditional pipe piles have insufficient uplift bearing capacity, and the single pile has a low bearing capacity. It cannot meet the growing construction requirements, and in the process of pile connection, the welded end plate of the pipe pile is easily corroded, which also reduces the bearing capacity of the pipe pile

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