Phase change driven vibratory pile hammer capable of reducing vibration influence and pile sinking method

Abstract

The invention discloses a phase change driven vibratory pile hammer capable of reducing the vibration influence and a pile sinking method. The phase change driven vibratory pile hammer capable of reducing the vibration influence comprises a phase change driving device, a rotary shaft, a driving device and a base. The phase change driving device comprises a rotary disk, a phase change device and aphase change excitation device. The phase change device comprises a phase change tube and a phase change material and further comprises a first fixed sheet, a phase change material, a sliding block, aspring, a fixed block and a second fixed sheet which are located in the phase change tube and connected in sequence. The first fixed sheet and the second fixed sheet are fixedly connected with the phase change tub. The fixed block is fixedly connected with the second fixed sheet. The sliding block can slide in the phase change tube. The invention further discloses the pile sinking method of the phase change driven vibratory pile hammer capable of reducing the vibration influence. Through the pile sinking method, the vibratory pile hammer can have no eccentric excitation force before reachingthe operating frequency, and the situation that the excitation force generates resonance due to the resonance frequency penetrating through a hammer-pile-foundation system is prevented. The rotary shaft of the vibratory pile hammer can gradually generate eccentric excitation force to drive a pile to be sunken into the soil when the frequency of the rotary shaft reaches the operating frequency.

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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