Integral quick lifting method for pile head of drilled pile during pre-embedding and drilling-free ring-cutting

Abstract

The invention discloses an integral quick lifting method for a pile head of a drilled pile during pre-embedding and drilling-free ring-cutting. The integral quick lifting method comprises the following steps of: mounting the drilled pile in front of a reinforcement cage after the drilling is ended, directly embedding foam sponge pipes into main ribs of an exposed supporting table of the reinforcement cage and an outer-end surface of a sounding pipe, fixing the foam sponge pipes by use of rubber bands to ensure that the foam sponge pipes do not slide; coating the foam sponge pipes outside a reinforcement positioning frame in the shape of Chinese character jing and a ring-shaped reinforcement positioning ring in advance; replacing drilling by use of a PVC tube every 40-50 cm along the perimeter of the pile body on the positioning frame, covering the foam sponge pipes for conveniently identifying positions during breaking construction; after foundation pit excavation is completed, lightly knocking at a position 10 cm above elevation of a pile top to expose the PVC tubes and the positioning ring, inserting a separating wedge into the PCV tubes, knocking with external force until the pile head is completely separated from the pile body; and utilizing lifting equipment to perpendicularly lift the upper pile head. The construction method is suitable for integral breaking and lifting construction of pile heads of foundation projects of highways, high speed railways, subways and high-rise buildings.

Description

technical field [0001] The invention relates to the field of construction, in particular to a method for pre-embedded pile heads of bored piles which avoids drilling circumcision and overall rapid lifting. Background technique [0002] With the rapid development of the economy, bored piles are widely used in various bridge projects and pile foundation projects of high-rise buildings because of their reliable quality and strong stratum adaptability. Due to the characteristics of excessive irrigation, the removal of pile heads of large-diameter pile foundations has always been a difficult problem. In engineering construction, the traditional manual demolition or manual assisted small-scale mechanical demolition has been basically used, which consumes a lot of manpower and material resources, and the speed is very slow, especially the damage to the quality of the pile body and the reinforcement of the pile body, the construction dust is large, and the noise is large. , does no...

AI Technical Summary

Problems solved by technology

In engineering construction, the traditional manual demolition or manual assisted small-scale mechanical demolition has been basically used, which consumes a lot of manpower and material resources, and the speed is very slow, especially the damage to the quality of the pile body and the reinforcement of the pile body, the construction dust is large, and the noise is large. , does not match the efficient construction speed required by current infrastructure construction projects

Images