Immersed tube grout pile construction process and pile tip bearing capacity reinforcement equipment

Abstract

The invention is a sinking tube pouring picket constructing technique and picket-end bearing capacity enhancer, placing the enhancer at positioning point of the picket base; the picket machine takes its place to align the end of the steel sleeve with the enhancer; starting sinking the tube to the calculated position; pulling the rope linked with the enhancer to drive axial umbrella rod, so that the top cap relieves the inclined support from restriction, the fixed stop block drives the annular slide block to make the supporting link rod push and spread the inclined support around so as to shrink into the steel sleeve, and the active stop block drives the picket boot to take out the enhancer. Placing bar reinforcement cage in the steel sleeve; vibrantly pulling the tube while pouring the concrete, and forming a picket. It can enhance the penetrating property of the steel sleeve, extrude picket end soil body closely, heighten picket-end bearing capacity, reduce deposition quantity, heighten picket forming quality and constructing efficiency, etc.

Description

technical field [0001] The invention relates to a construction method of building foundation piles and a device for increasing the bearing capacity of pile ends, in particular to a construction technique for sinking tube grouting piles and a device for improving the bearing capacity of pile ends of sinking tube grouting piles. technical background [0002] Immersed tube cast-in-situ pile is to sink the steel casing with conical steel pile shoes or prefabricated reinforced concrete pile shoes into the soil, then put the steel cage into the pipe and fix it, and then vibrate the steel casing while pouring concrete. Pull it out of the hole to form a reinforced concrete pouring pile. At present, the construction methods of immersed pipe grouting piles include vibration method, vibro-shock method and hammering method. Their construction process is as follows: place prefabricated pile tips (boots) or tapered steel pile tips (boots), place the pile driver, align the steel casing wi...

AI Technical Summary

Problems solved by technology

[0007] The invention provides a construction technique of immersed tube grouting piles and a pile-end bearing capacity enhancer, which solves the technical problem of weakening the pile-end bearing capacity due to piercing after the original pile boots compact the pile-end soil

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