Vibration pile machine for immersed tube sand-gravel pile and pile forming method

Abstract

The invention belongs to the technical field of building instruments, and discloses a vibration pile machine for an immersed tube sand-gravel pile and a pile forming method. The method comprises the steps that the pile machine is assembled, and when the pile machine enters a field to be assembled, a hole is formed in the upper portion of a feeding opening in a guide pipe of the pile machine; the guide pipe is connected with an air compressor through a pipeline, and sealing measures are taken; after the pile machine is assembled, construction is conducted; a hopper is used for pouring sand andgravel into the guide pipe, after a pile head and the guide pipe enter the designed bottom elevation, the air compressor is started to supply air, and the ventilation pressure intensity, the weight ofthe sand and gravel in the guide pipe and the self weight of a valve push away the valve, so that the sand and gravel are conveyed into a soil layer; and the sand and gravel are repeatedly vibrated and compacted until the sand and gravel achieve above the ground to form a complete pile body. According to the machine and the method, the compressed air is input into the guide pipe through the air compressor while the sand and gravel are input into the guide pipe, so that the pressure in the guide pipe is larger than the lateral pressure generated by flow plastic layer sludge on the sand and gravel; the sand and gravel enter a sludge layer to form the pile body, so that the design requirement of the immersed tube sand-gravel pile is met; and meanwhile, the sand-gravel pile forming quality isimproved, and the probability of pile breakage is reduced.

Description

Technical field [0001] The invention belongs to the technical field of construction equipment, and in particular relates to a vibrating pile machine and a pile forming method for sunk pipe sand-stone piles. Background technique [0002] At present, the closest existing technology: the vibratory pile driver uses its high-frequency vibration to vibrate the pile body with high acceleration, and transmits the vertical vibration generated by the machine to the pile body, causing the soil structure around the pile to change due to vibration and its strength reduce. The soil around the pile body is liquefied to reduce the frictional resistance between the pile side and the soil body, and then the pile is sunk into the soil by the downward pressure of the pile machine, the vibrating sinker and the pile body's own weight. When pulling out the pile, pull up the pipe with the lifting force of the pile machine while one side is vibrating. The excitation force required by the piling machine...

AI Technical Summary

Problems solved by technology

[0003] Due to the earth dam formation of Qian'an Huaaopao project is fluid plastic clay and silt, its fluidity and the lateral pressure from the surrounding silt make it difficult to unload sand and gravel materials during the construction process of immersed tube sandstone piles, and it is difficult to meet the design requirements. Pile quality; and in the construction process, the problems of broken piles, shrinkage and poor quality of piles are prone to occur, which will cause serious troubles to the quality of consolidation and drainage of soft soil foundations and construction progress

[0004] To sum up, the existing problems in the prior art are: (1) When the existing vibratory pile driver drives piles on fluid plastic clay and silt, due to its fluidity and lateral pressure from the surrounding silt, the immersed pipe During the construction of sand and gravel piles, it is difficult to cut sand and gravel materials, and it is difficult to achieve the pile quality required by the design

[0005] (2) The existing vibratory pile driver is prone to broken piles, diameter shrinkage and poor quality of piles during the construction process, causing serious troubles to the quality of consolidation and drainage of soft soil foundations and construction progress

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