Explosion device of filling pile head and construction method thereof

Abstract

The invention discloses an explosion device of a filling pile head. The explosion device comprises a plurality of coaxial annular protective cylinders, wherein the tops of the annular protective cylinders are fixedly connected into an integral device body by virtue of a connecting device, a main reinforcement positioning interlayer is arranged in a gap between the outmost annular protective cylinder and the adjacent annular protective cylinder of the device body, and a lifting ear plate and a rebar through bracket which enables support rebar of a reinforcement cage to pass through and is used for positioning the support rebar of the reinforcement cage are fixed to the top of the device body. According to the explosion device, the bonding strength between the main reinforcement and concrete of the pile head is reduced, the risk of easy damage to the main reinforcement is eliminated, additionally, the pile head are changed into small blocks, the pile head can be exploded block by block, the performance requirement on lifting equipment is reduced, the construction efficiency and application range of the explosion construction of an original pile head are improved, the construction dust is reduced, and the construction cost is reduced.

Description

technical field [0001] The invention relates to the technical field of civil engineering foundation construction, in particular to a device for removing pile heads of cast-in-situ piles and a construction method thereof. Background technique [0002] Concrete pouring piles are widely used in various foundation projects because of their reliable quality, mature construction technology, strong stratum adaptability and good bearing capacity. In the construction of cast-in-place piles, in order to ensure the quality of the concrete at the pile head and avoid the specification that the end of the pile foundation is mixed with laitance and mud, it is required that the poured concrete should exceed the set height of the pile head by 0.5-1.0m, and then Chisel off the protruding part (called the broken pile head). In order to chisel away the concrete beyond the pile head of the set cast-in-situ pile, manual chiseling or manual-assisted small-scale mechanical removal are generally us...

AI Technical Summary

Problems solved by technology

Since this method removes from the periphery of the pile head inward, on the one hand, there is a risk of damaging the main reinforcement during the removal process; , high labor intensity, slow construction speed, high dust and high risk during the demolition process, especially not suitable for the demolition operation of pile heads of large-diameter pile foundations, and large-diameter pile foundations belong to the current development trend of bridge pile foundations

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