Prefabricated cast-in-place pile and pile forming method thereof

Abstract

The invention belongs to the field of construction, and particularly relates to a prefabricated cast-in-place pile and a pile forming method of the prefabricated cast-in-place pile. The lower portion of a pile is a prefabricated pile body (2), and the upper portion of the pile is a cast-in-place pile body (1). The diameter of the cast-in-place pile body (1) on the upper portion is larger than that of the prefabricated pile body (2) on the lower portion, and the upper end of the prefabricated pile body (2) is covered or not by the cast-in-place pile body (1); concrete or cement mixture filler (3) is arranged or not at the connection between the prefabricated pile body (2) and the cast-in-place pile body (1) according to the requirements on design, or the cast-in-place pile body (1) on the upper portion and the prefabricated pile body (2) on the lower portion are in butt joint in the manner that the diameter of the cast-in-place pile body (1) on the upper portion is larger than that of the prefabricated pile body (2) on the lower portion, or the diameter of the cast-in-place pile body (1) on the upper portion is equal to that of the prefabricated pile body (2) on the lower portion. The pile forming method comprises a pile forming method A and a pile forming method B. According to the prefabricated cast-in-place pile and the pile forming method of the prefabricated cast-in-place pile, the prefabricated pile body and the cast-in-place pile body can be flexibly combined, the application range of stratums is broad, one single pile is high in bearing capacity, very high practicability is achieved, the stress mechanism of piles is met, concrete consumption is reduced, construction is greatly accelerated, and the construction cost is reduced.

Description

technical field [0001] The invention belongs to the field of construction, and in particular relates to a prefabricated cast-in-situ pile and a pile forming method thereof. Background technique [0002] At present, the pile length is limited by the height of the pile frame no matter whether it is foreign or domestic, the length of the pile cannot be too long. In addition, when the pile diameter of the immersed pile is large and the pile is long, it is not only difficult to sink the pipe, but also takes a long time to pour concrete on site, and it is very difficult to remove the outer pipe. Therefore, sometimes in order to increase the bearing capacity, the bottom end needs to be made. Enlarging the head makes it take a long time to build piles. Sometimes when there is a weak interlayer at the bottom of the expanding head, the length of the pile must be increased to pass through the weak interlayer. This also increases the limitation of the height of the pile machine tower, m...

AI Technical Summary

Problems solved by technology

In addition, when the pile diameter of the immersed pile is large and the pile is long, it is not only difficult to sink the pipe, but also takes a long time to pour concrete on site, and it is very difficult to remove the outer pipe. Therefore, sometimes in order to increase the bearing capacity, the bottom end needs to be made. Enlarging the head makes it take a long time to build piles. Sometimes when there is a weak interlayer at the bottom of the expanding head, the length of the pile must be increased to pass through the weak interlayer. This also increases the limitation of the height of the pile machine tower, making it difficult to sink and pull the pipe. bigger

Prefabricated piles can be connected to piles due to the length of the pile, and the pile length is not limited by the height of the pile machine. However, the cost of solid prefabricated piles is high, and the shear strength of hollow prestressed pipe piles has the problem that it is difficult to meet the design requirements. Increasing the pile length When there is a hard interlayer in the ground, the construction noise will be large and the pile sinking will be difficult, and there will often be pile explosions, and sometimes lead holes will be required, resulting in high construction costs and slow construction speed.

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