High-pressure spray pile vibrosinking device and process

Abstract

The invention discloses a high-pressure spray pile vibrosinking device. Ground components comprise a vertical exciting force generator and a pile gripper which is connected with the vertical exciting force generator; the lower part of the vertical exciting force generator is connected with an outer high-pressure joint which is connected with a high-pressure spray generator; underground components comprise an inner joint which is connected with the lower end of the pile gripper and a spray pipe which is connected with the inner joint; the end of the spray pipe is provided with a high-pressure spray nozzle; a horizontal exciting force generator is arranged between the spray pipe and the high-pressure spray nozzle; and the high-pressure spray generator sprays to inject slurry or water, the sprayed liquid forms a high-pressure liquid column to cut, crush and liquefy soil, the horizontal exciting force generator generates vibratory force in a horizontal direction so as to vibrate the cut, crushed and liquefied soil, and a pile body is quickly pressed into a formation to reach a preset pile sinking depth, so that a technology for constructing difficult and different formations can be provided, and the construction benefit and quality can be greatly improved.

Description

technical field [0001] The invention relates to a pile sinking process for reinforced concrete prefabricated piles, in particular to a high-pressure jet vibration pile sinking device and a pile sinking process. Background technique [0002] The traditional pile sinking technology of reinforced concrete prefabricated piles includes vibration pile sinking method, hammer type pile sinking method, and static pressure pile sinking method. Among them, the vibration pile sinking method is generally suitable for sandy soil, hard plastic and soft plastic cohesive soil. Medium-density and loose gravel soil; hammering pile sinking method is generally suitable for loose, medium-density sandy soil and cohesive soil. Pile hammers include drop hammers, single-action steam hammers, double-action steam hammers, diesel engine hammers, Hydraulic hammers, etc., can be selected according to the soil conditions; the static pressure pile sinking method can be used in soft clay with a standard pene...

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Problems solved by technology

[0003] All in all, the pile sinking depths of the above three pile sinking processes are often limited by the compression properties of the pressed soil, and are generally only suitable for high compressibility (generally refers to the compression coefficient greater than 0.5MPa -1 ) of silty soil, but it is difficult to sink the pile end to the predetermined depth by using traditional pile sinking technology for silty clay with medium and low compressibility, silty fine sand layer, gravel layer, etc. It brings a large soil squeezing effect, which greatly limits the applicability of reinforced concrete prefabricated piles

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