Vibrating pile hammer and pile sinking method based on phase change drive to reduce vibration influence

Abstract

The invention discloses a vibrating pile hammer and a pile sinking method based on phase change drive to reduce the impact of vibration, including a phase change drive device, a rotating shaft, a drive device and a base; the phase change drive device includes a rotating disk, a phase change device, a phase change Exciting device; the phase change device includes a phase change tube, a phase change material, and a first fixed plate, a phase change material, a sliding block, a spring, a fixed block, and a second fixed plate that are sequentially connected in the phase change tube. The first fixed piece and the second fixed piece are fixedly connected with the phase change tube, the fixed block is fixedly connected with the second fixed piece, and the sliding block can slide along the inside of the phase change tube; the invention also discloses a vibrating pile hammer based on the phase change drive to reduce the impact of vibration The pile sinking method can make the vibrating pile hammer have no eccentric excitation force before reaching the working frequency, avoiding the problem of resonance caused by the frequency of the exciting force passing through the resonance frequency of the hammer-pile-foundation system. The frequency of the rotating shaft of the vibrating pile hammer reaches The eccentric excitation force is gradually generated at the operating frequency to sink the pile into the soil.

Description

technical field [0001] The invention belongs to the field of vibratory pile sinking in geotechnical engineering, in particular to a vibrating pile hammer based on phase change driving and reducing vibration influence. Background technique [0002] In geotechnical engineering piling construction, the pile can be statically loaded on the top of the pile to press the pile into the soil layer, or the pile can be driven into the soil layer with an impact load on the top of the pile, but the impact load has a greater impact on the surrounding environment, so This method of impact piling is often prohibited in urban areas where there are many buildings. At present, there is also a vibrating hammer clamped on the top of the pile to drive the pile to generate a certain frequency of vertical continuous vibration. During this process, the side friction resistance of the pile and the soil and the resistance of the pile end are reduced, so that the pile is sunk into the foundation. This ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem of excessive vibration of the surrounding environment caused by passing through the resonance frequency of the vibrating hammer-pile-foundation system during the process of increasing the excitation frequency from zero to the working frequency when the ordinary vibrating pile hammer is started, the present invention allows the vibrating pile hammer to reach There is no eccentric excitation force before the operating frequency, and the eccentric excitation force is gradually generated when the vibrating pile hammer reaches the operating frequency. The invention provides a vibrating pile hammer based on phase change drive to reduce the impact of vibration

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