Construction method for connecting part of PHC tubular piles

Abstract

The invention discloses a construction method for a connecting part of PHC tubular piles, which is characterized in that: the circumferential positioning of two butted PHC tubular piles (8) on each layer is carried out through a connecting piece (7); and the inside and outside of a pipe wall of the connecting part of the PHC tubular piles (8) on each layer are grouted from the bottom up. The construction method for the connecting part of the PHC tubular piles ensures good connecting effect between the PHC tubular piles (8) and low cost.

Description

technical field [0001] The invention relates to a construction method of a pile foundation in civil engineering, in particular to a construction method of a joint of a PHC pipe pile (full name of a prestressed high-strength concrete pipe pile) during construction in a soft soil environment. Background technique [0002] In civil engineering, PHC pipe piles have become an important foundation form in industrial buildings or civil buildings due to their advantages such as high single pile bearing capacity, low cost, and fast construction speed. [0003] PHC pipe piles in the prior art include a cylindrical reinforced concrete pipe pile body and end plates fixed at both ends of the pipe pile body. The end plates are provided with several pairs of threaded holes and through holes. The said through hole is in radial communication with the threaded hole and the axes of the two are parallel. [0004] The construction method of the junction of the PHC pipe pile of prior art is as f...

AI Technical Summary

Problems solved by technology

[0007] First of all, due to the limitation of on-site construction conditions and welding technology, the weld between the end plates is prone to discontinuity, insufficiency, and slag inclusion in the weld, and, after the welding is completed, it is limited by the construction period, and the pause time is short (if Waiting for the weld to cool completely before piling will delay the construction period), the weld that is not completely cooled is driven into the soft soil along with the pipe pile, and once the weld at this time encounters groundwater, brittle cracks will occur; so the PHC pipe of the prior art The joints between the piles are prone to bending or even breaking due to excessive concentration of local stress, that is, the vertical uplift bearing capacity and compressive bearing capacity of the joints of the PHC pipe piles are insufficient, and the connection effect between the PHC pipe piles is not good. ideal

Secondly, because the cost of the end plate generally accounts for 10% to 20% of the total cost of the PHC pipe pile, its cost is relatively high

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