Connection method of concrete precast pile and pile foundation cap

Abstract

The invention discloses a connection method of a concrete precast pile and a pile foundation cap. The method comprises the following steps that a plurality of corresponding lower twisted steel bars are embedded into the concrete precast pile; the upper end of each upper twisted steel bar is mechanically connected with a sleeve; the upper twisted steel bars arranged in the pile foundation cap are subjected to tapping and then connected into the sleeves; and then ordinary concrete is poured on the pile foundation cap. The connection method is simple in structure, saves comprehensive cost of engineering, and can improve the construction quality of concrete pile foundation engineering; the upper and lower twisted steel bars are mechanically connected with the sleeves, so that an engineering safety accident can be effectively avoided and a hidden engineering danger can be greatly reduced; and the connection method is applied to concrete precast pile foundation engineering, expands an application scope of the concrete precast pile, and more adapts to market development.

Description

technical field [0001] The invention relates to a connection method between a concrete prefabricated pile and a pile foundation cap. Background technique [0002] At present, with the improvement of the importance of modern buildings and the continuous increase of building height, higher requirements are put forward for the bearing capacity of the foundation. For the pile foundation project using concrete prefabricated piles, it means that the requirements for the connection between the pile and the cap will be higher. The current construction mostly uses the bonding of the core-filled concrete and the inner wall of the pile and the destruction of the concrete prefabricated pile head. The connection between the pile and the cap is realized by connecting the steel bar and the cap, so that the prefabricated pile top and the cap foundation can be stressed at the same time, but there are many problems in this method, such as: only relying on the core-filled concrete to bear the ...

AI Technical Summary

Problems solved by technology

For the pile foundation project using concrete prefabricated piles, it means that the requirements for the connection between the pile and the cap will be higher. The current construction mostly uses the bonding of the core-filled concrete and the inner wall of the pile and the destruction of the concrete prefabricated pile head. The connection between the pile and the cap is realized by connecting the steel bar and the cap, so that the prefabricated pile top and the cap foundation can be stressed at the same time, but there are many problems in this method, such as: only relying on the core-filled concrete to bear the pull-out force , and sometimes the construction site environment is complex or even harsh, which will lead to serious water accumulation in the inner cavity of the pile, and the mud on the inner wall cannot be cleaned. The troublesome construction makes the construction quality of the core-filled concrete difficult to control, and the core-filled concrete is often pulled out to affect the pull-out quality lead to engineering problems etc.

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