Vibrating Pile Hammer Driven by Magnetism and Pile Sinking Method

Abstract

The invention discloses a magnetic-driven vibration pile hammer and a pile sinking method. The vibration pile hammer comprises a mass block and a magnetic-driven driver; the magnetic-driven driver comprises an alternating power supply, a rectifying circuit and a magnetic-driven extension device; the magnetic-driven extension device comprises a magnetic-driven extension block and a lead; the lead is wound on the outer side of the magnetic-driven extension block; when current in the lead is changed, a magnetic field suffered by the magnetic-driven extension block is changed; and at this time, the length of the magnetic-driven extension block is also changed. The vibration excitation frequency of the vibration pile hammer can be directly fed in the working frequency, so that the problem of higher vibration in surrounding environment caused by the resonance frequency passing through a vibration hammer-pile-foundation system in the process of increasing the vibration excitation frequency from zero to the working frequency at the time of starting a common vibration pile hammer is overcome.

Description

technical field [0001] The invention belongs to the field of vibrating pile sinking in geotechnical engineering, and in particular relates to a vibrating pile hammer driven by magnetism. 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 method is relatively It has li...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem that the vibration of the surrounding environment is too large due to 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, in order to make the vibrating pile hammer The excitation frequency directly enters the working frequency, and the present invention provides a vibrating pile hammer driven by magnetism

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