Pile driving device and pile driving method for reducing the influence of vibration

Abstract

The invention discloses a pile sinking device and a pile sinking method for reducing the impact of vibration. The pile sinking device places a vibrating pile hammer on the top of the pile, and the vibrating pile hammer includes a device for reducing the impact of vibration, a rotating shaft, a driving device and a base, and the driving device and The rotating shaft is connected and drives the rotating shaft to rotate. The driving device is installed on the base. The vibration reduction device includes a rotating disc, a pressing device, and an eccentric device. The rotating disc and the rotating shaft are fixedly connected. The pressing device and the eccentric device are installed on the rotating plate; during pile sinking, there is no eccentric excitation force before the vibrating pile hammer reaches 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, and 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 vibration pile sinking in geotechnical engineering, in particular to a pile sinking method for reducing the impact of vibration. 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...

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, but the eccentric excitation force is gradually generated when the vibrating pile hammer reaches the operating frequency. The invention provides a pile sinking method that reduces the impact of vibration

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