Preparation method of pre-tensioning method prestressed centrifugal concrete solid square pile

Abstract

The invention discloses a preparation method of a pre-tensioning method prestressed centrifugal concrete solid square pile, which comprises the following steps: preparing a mold, and brushing a parting agent on the mold; mounting a reinforcement cage in the mold, and arranging a tensioning end plate; feeding prepared concrete into the mold; conducting prestressed tensioning on the reinforcement cage according to the designed tensioning stress, and then carrying out locking and anchoring; putting the mold which is fed with the concrete on a centrifugal machine for centrifugal forming treatment; after centrifugation is completed, forming a central hollow core in the center of the square pile, and pouring out residual slurry separated from the concrete completely; conducting secondary filling on the center of the pile through high-strength-grade concrete, filling the center hollow core through secondary material pumping, and forming the square pile; performing steam curing on the formed solid square pile; and releasing and demolding the cured solid square pile. According to the method, the strength of the pile body of the solid square pile is high, and the phenomena that the four corners of the solid square pile in a non-centrifugal production process fall off and are unfilled and the strength difference of the upper section and the lower section of the pile body is large due to concrete vibration are avoided.

Description

technical field [0001] The invention relates to the field of prefabricated pile preparation, in particular to a method for preparing a pretensioned prestressed centrifugal concrete solid square pile. Background technique [0002] With the rapid development of my country's civil engineering field, the situation of pile foundations subjected to horizontal loads has been paid more and more attention by engineers and technicians in the construction of urban high-rise buildings, port terminals, and earthquake resistance. The current pile foundation mainly includes pipe piles, hollow square piles and solid square piles according to different needs. [0003] When the current solid square piles are produced, they mainly use figure 1 The open mold 19 in the open mold 19, put the steel cage in the open mold 19, then pour concrete in the open mold 19, and use the vibrator to vibrate the poured concrete, but in this way, when the vibrator vibrates the concrete, the concrete The sinkin...

AI Technical Summary

Problems solved by technology

[0003] When the current solid square piles are produced, they mainly use figure 1 The open mold 19 in the open mold 19, put the steel cage in the open mold 19, then pour concrete in the open mold 19, and use the vibrator to vibrate the poured concrete, but in this way, when the vibrator vibrates the concrete, the concrete The sinking of the aggregate causes the separation and delamination of the various components of the concrete, resulting in uneven axial load bearing force of the pile body, poor overall performance of the pile body structure, and solid square piles are not resistant to driving during the pile sinking process.

Images