Vibrating Pile Hammer Based on Adjusting Damping to Reduce Vibration Affecting the Surrounding Environment

Abstract

The invention discloses a vibration pile hammer capable of reducing vibration influence on the surrounding environment based on damping adjusting. The vibration pile hammer comprises a mass block, a damping spring mixing structure, a vibration excitation hammer and a first spiral spring which are sequentially connected from top to bottom; and the damping spring mixing structure comprises a secondspiral spring, a third spiral spring, a first damper, a second damper, a first pressure bearing plate and a second pressure bearing plate. When the excitation frequency of the vibration excitation hammer exceeds the resonance frequency of a foundation, by adjusting the damping coefficients of the first damper and the second damper, a system composed of the additional mass block, the springs and the adjustable dampers is taken as a vibration absorber to restrain vibration of the vibration excitation hammer so that the influence of the foundation resonance on the adjacent building can be reduced; and when the excitation frequency of the vibration excitation hammer reaches the working frequency, through the change of the adjustable dampers, the system composed of the additional mass block, the springs and the adjustable dampers is used as a vibration amplifier to increase the dynamic load applied to a pile by the vibration pile hammer so that pile sinking can be accelerated.

Description

technical field [0001] The invention belongs to the field of vibratory pile sinking in geotechnical engineering, and in particular relates to a vibratory pile hammer that reduces the impact of vibration on the surrounding environment based on damping adjustment. 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 tha...

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Problems solved by technology

[0003] In order to overcome the problem of excessive vibration of the surrounding environment due to passing through the foundation resonance frequency during the process of increasing the excitation frequency of the ordinary vibrating pile hammer from zero to the working frequency, and the problem that it is difficult to amplify the vibration of the vibrating pile hammer at the working frequency, the present invention The invention provides a vibrating pile hammer based on adjusting the damping to reduce the impact of vibration on the surrounding environment

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