Full-automatic foundation pile integrity testing force hammer

Abstract

The invention discloses a full-automatic foundation pile integrity testing force hammer which comprises a mounting plate and is characterized in that the mounting plate is fixedly connected with a first round rod, the first round rod is fixedly connected with a speed reducer, the mounting plate is fixedly connected with a vertical rod, the vertical rod is fixedly connected with a second round rod, and the second round rod is fixedly connected with an air cylinder; the air cylinder is provided with a working air cylinder, a compression air cylinder, an upper air channel and a lower air channel, the working air cylinder is communicated with the upper air channel and the lower air channel, the compression air cylinder is communicated with the upper air channel and the lower air channel, an upper spin valve is installed in the upper air channel, and a lower spin valve is installed in the lower air channel. The invention relates to the field of engineering equipment, in particular to a full-automatic foundation pile integrity testing force hammer. The technical problem to be solved by the invention is to provide the full-automatic foundation pile integrity test force hammer which is convenient for foundation pile integrity test.

Description

technical field [0001] The invention relates to the field of engineering equipment, in particular to an automatic foundation pile integrity testing force hammer. Background technique [0002] The foundation pile is a very important part of the engineering construction, and its quality directly affects the success or failure of the entire infrastructure project. Among them, the low-strain pile integrity detection technology has been widely used and promoted due to its unique advantages. [0003] According to the influence on the detection signal of the foundation pile, the vibration excitation equipment is considered from four aspects, namely the hammer head material, impact energy, contact area, and pulse width. [0004] 1. Hammer head material: The material is too hard, which will excite high-frequency pulse waves. High-frequency waves can improve the resolution of defects and are beneficial for detecting shallow defects in the pile body. However, high-frequency waves are ...

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Problems solved by technology

[0007] 4. Pulse width: a large pulse width is beneficial to the detection of long piles and deep defects, but the corresponding wavelength increases. Due to the diffraction ability of the wave, if the wavelength of the incident wave is much larger than the characteristic size of the defect in the pile body, the wave will be larger. Part of it can be diffracted, the reflected wave intensity is reduced, and the ability to identify small defects in the pile is poor, that is, the resolution is low

If the pulse width is reduced and the wavelength is reduced, the requirement of treating the pile as a one-dimensional elastic rod cannot be met, and the velocity and waveform will be distorted

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