Calibrating device and calibrating method applied to dynamic measuring instrument of foundation pile

Abstract

The invention discloses a calibrating device applied to a dynamic measuring instrument of a foundation pile. The calibrating device comprises a standard pile, a guide rail, a heavy hammer and a standard measuring instrument, wherein the guide rail is vertically fixed on the top surface of the standard pile; the heavy hammer is arranged on the guide rail, vertically slides along the guide rail and then hammers the standard pile; and the standard measuring instrument and a dynamic measuring instrument of a foundation pile to be measured are separately arranged on the standard pile and are respectively used for detecting a waveform signal generated by hammering the standard pile. Compared with the prior art, the calibrating device disclosed by the invention has the characteristics that a transient excitation mode is used to replace an existing steady-state excitation mode, so that actual working conditions of the dynamic measuring instrument of the foundation pile to be measured can be better reflected, and higher accuracy in calibration is realized. The invention also provides a calibrating method applied to the dynamic measuring instrument of the foundation pile.

Description

technical field [0001] The invention relates to the field of foundation pile measurement, in particular to a verification device and a verification method applied to a foundation pile dynamic measuring instrument. Background technique [0002] The foundation pile dynamic measuring instrument is used to measure the response of the foundation pile under the action of transient impact load, and judge whether the pile body is intact or not and indirectly judge the vertical bearing capacity of the single pile according to the spectrum in the measured time domain Test analytical instruments. Whether the measurement of the dynamic pile measuring instrument is correct or not is directly related to the reliability of the pile detection results, so the verification of the pile dynamic measuring instrument is particularly important before measuring the pile response. [0003] At present, the verification method of the existing foundation pile dynamic measuring instrument usually adopt...

AI Technical Summary

Problems solved by technology

[0003] At present, the verification method of the existing foundation pile dynamic measuring instrument usually adopts the steady-state excitation method to verify it, but the steady-state excitation method does not conform to the actual working conditions of the foundation pile dynamic measuring instrument, and fails to reflect its real working state , leading to inaccurate test results

Moreover, since the standard instruments are all established in the metrology laboratory, they cannot be dismantled or carried, so the verification of the pile dynamic measuring instrument can only be carried out in the metrology laboratory, which is very inconvenient

In addition, the verification method of the existing foundation pile dynamic measuring instrument cannot really judge the signal analysis part of the foundation pile dynamic instrument, such as adding the measured spectrum distortion measurement part to the signal analysis part, whether the parameters are in line with the real situation, etc.

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