CN105544623A - Calibrating device and calibrating method applied to dynamic measuring instrument of foundation pile - Google Patents
Calibrating device and calibrating method applied to dynamic measuring instrument of foundation pile Download PDFInfo
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- CN105544623A CN105544623A CN201610066640.1A CN201610066640A CN105544623A CN 105544623 A CN105544623 A CN 105544623A CN 201610066640 A CN201610066640 A CN 201610066640A CN 105544623 A CN105544623 A CN 105544623A
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- pile
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- measuring instrument
- weight
- dynamic measuring
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/10—Miscellaneous comprising sensor means
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
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
The present invention relates to foundation pile fields of measurement, particularly relate to a kind of calibrating installation and the calibration method that are applied to foundation pile dynamic measuring instrument.
Background technology
Foundation pile dynamic measuring instrument is for measuring the response of foundation pile under the effect of transient impact load, and judges the whether intact test analytical instrument with indirectly judging vertical bearing capacity of single pile of foundation pile pile body according to the spectrogram under surveyed time domain.The correctness of the measurement of foundation pile dynamic measuring instrument is directly connected to the reliability of a testing result, therefore before the response of measurement foundation pile, seems particularly important to the calibrating of foundation pile dynamic measuring instrument.
At present, the calibration method of existing foundation pile dynamic measuring instrument adopts stable state exciting mode to examine and determine it usually, and stable state exciting mode do not meet the real work situation of foundation pile dynamic measuring instrument, fail to reflect its real work state, cause verification result to be inaccurate.And because standard is all set up in Measurement Laboratory, can not tear open also not utilize and carry, cause to carry out in Measurement Laboratory the calibrating of foundation pile dynamic measuring instrument, examine and determine very inconvenient.In addition, the calibration method of existing foundation pile dynamic measuring instrument can not carry out real judge to the signal analysis part of foundation pile dynamic instrument, whether meets truth etc. as signal analysis part increases institute's mapping spectrum distortion measure portion parameter.
Summary of the invention
The invention reside in the shortcoming and deficiency that overcome prior art, a kind of calibrating installation being applied to foundation pile dynamic measuring instrument is provided, its to the calibrating of foundation pile dynamic measuring instrument more accurately, effective Quantitative evaluation is carried out to result and calibrating can be realized at the scene without the need to delivering to laboratory.
The present invention is achieved by the following technical solutions: a kind of calibrating installation being applied to foundation pile dynamic measuring instrument, comprises standard pile, guide rail, weight and standard meter; Described guide rail is vertically fixed on the end face of described standard pile; Described weight to be arranged on described guide rail and standard pile described in hammering after vertically sliding along this guide rail; Described standard meter and foundation pile dynamic measuring instrument to be measured are separately positioned on standard pile, and detect this standard pile respectively by the waveform signal produced after hammering.
Compared to prior art, the present invention replaces existing stable state exciting mode in transient excitation mode, more can reflect the real work situation of foundation pile dynamic measuring instrument to be measured, examines and determine more accurate; And required equipment and instrument simple, build also convenient, can scene be carried into, and the calibrating of foundation pile dynamic measuring instrument can be completed at the scene, without the need to delivering to Measurement Laboratory.
Further, described weight increases from the increase of the vertical height of described standard pile with the quality of weight and weight the hammering energy of described standard pile.
Further, described weight meets the hammering energy W of described standard pile:
W＝mgh
Wherein, m is the quality of weight, and h is the vertical height of weight from standard pile, and g is acceleration of gravity.
Further, described standard meter comprises standard transducer and reference waveform collecting unit; The waveform signal that the standard pile of measurement produces at the end face of described standard pile, and is sent to the collecting unit of described reference waveform collecting unit and foundation pile dynamic measuring instrument to be measured by the sensor setting of described standard transducer and foundation pile dynamic measuring instrument to be measured respectively.
Further, a felt pan is also comprised; Described felt pan is laid on the end face of described standard pile.
Further, described weight is a spheroid or Rotary-table or spheroid or cube.
The present invention also provides a kind of calibration method being applied to foundation pile dynamic measuring instrument simultaneously, comprises the steps:
Step 1 a: end face guide rail being vertically arranged on standard pile; One weight is set on the guideway, makes it erect along this guide rail
Hammering standard pile after straight landing;
Step 2: detect this standard pile by the waveform signal produced after hammering respectively by standard meter and foundation pile dynamic measuring instrument to be measured, and judge by the result comparing detection the accuracy that foundation pile dynamic measuring instrument to be measured is measured.
Compared to prior art, the present invention replaces existing stable state exciting mode in transient excitation mode, more can reflect the real work situation of foundation pile dynamic measuring instrument to be measured, examines and determine more accurate; Meanwhile, by regulating the quality of weight and height quantitatively to regulate it to the hammering energy of standard pile, the quantitative calibrating of foundation pile dynamic instrument to be measured is achieved.
In order to understand better and implement, describe the present invention in detail below in conjunction with accompanying drawing.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention is applied to the calibrating installation embodiment of foundation pile dynamic measuring instrument;
Fig. 2 is the flow chart that the present invention is applied to the calibration method embodiment of foundation pile dynamic measuring instrument.
Detailed description of the invention
Refer to Fig. 1, it is the structural representation that the present invention is applied to the calibrating installation embodiment of foundation pile dynamic measuring instrument.This calibrating installation being applied to foundation pile dynamic measuring instrument comprises standard pile 1, guide rail 2, weight 3 and standard meter 4.Described guide rail 2 is vertically fixed on the end face of described standard pile 1; Described weight 3 to be arranged on described guide rail 2 and standard pile 1 described in hammering after vertically sliding along this guide rail 2.Described standard meter 4 and foundation pile dynamic measuring instrument 5 to be measured are separately positioned on standard pile 1, and detect this standard pile 1 respectively by the waveform signal produced after hammering.
Described standard meter 4 comprises standard transducer 41 and reference waveform collecting unit 42.The sensor 51 of described standard transducer 41 and foundation pile dynamic measuring instrument to be measured is arranged on the end face of described standard pile 1, and respectively the waveform signal that standard pile 1 produces is sent to the collecting unit 52 of described reference waveform collecting unit 42 and foundation pile dynamic measuring instrument to be measured.Described standard transducer 41 and reference waveform collecting unit 42 can separately be used alone, to realize demarcating separately the sensor of foundation pile dynamic measuring instrument; Whether meanwhile, described standard transducer 41 and reference waveform collecting unit 42 also can use jointly, to realize effectively demarcating a whole set of foundation pile dynamic measuring instrument, and then effectively judge the validity of the foundation pile dynamic measuring instrument institute mapping spectrum distortion parameter index such as.
For preventing standard pile 1 from damaging by the hammering of weight 3, the present invention also comprises a felt pan (not shown), and described felt pan is laid on the end face of described standard pile 1.For convenience of regulating the size of impacting pulse width time, the thickness of described felt pan can select different thickness as required.
Described weight 3 increases from the increase of the vertical height of described standard pile 1 with the quality of weight 3 and weight 3 hammering energy of described standard pile 1.Concrete, if set the quality of weight 3 as m, weight 3 is h from the vertical height of described standard pile 1, and acceleration of gravity is g, then now the gravitional force of described weight 3 is mgh.When weight 3 with zero initial velocity along described in hammering after described guide rail 2 vertically landing during standard pile 1, the gravitional force of described weight 3 will convert kinetic energy to, and according to law of conservation of energy, described weight 3 then meets described standard pile 1 hammering energy W: W=mgh.
The size and shape of described weight 3 can change according to demand, for simulating different surge waveform.In the present embodiment, described weight 3 is a spheroid or Rotary-table or spheroid or cube.
It is adjustable that described weight 3 is arranged on position on described guide rail 2 and described weight 3 from the vertical height of described standard pile 1, can quantitatively regulate weight 3 to the size of the hammering energy of described standard pile 1 by regulating this height.
In the present invention, described weight 3 is on described guide rail 2 during landing, instantaneous velocity on the diverse location of weight 3 on guide rail 2 is different, its instantaneous energy is also different, namely weight 3 makes described standard pile 1 produce wave form varies in the mode of transient excitation, it can reflect the real work situation of foundation pile dynamic measuring instrument, therefore also more accurate to the calibrating of foundation pile dynamic measuring instrument 5 to be measured.
Compared to prior art, the calibrating installation being applied to foundation pile dynamic measuring instrument provided by the invention replaces existing stable state exciting mode in transient excitation mode, more can reflect the real work situation of foundation pile dynamic measuring instrument to be measured, examine and determine more accurate; Meanwhile, by regulating the quality of weight and height quantitatively to regulate it to the hammering energy of standard pile, the quantitative calibrating of foundation pile dynamic instrument to be measured is achieved.Further, simulate different surge waveforms by difform weight, closer to the actual working state of foundation pile dynamic measuring instrument, calibrating effect is more accurate.Not only can be demarcated separately the sensor of foundation pile dynamic measuring instrument by described standard transducer and reference waveform collecting unit, effectively can also demarcate a whole set of foundation pile dynamic measuring instrument, effectively can judge whether foundation pile dynamic measuring instrument institute mapping spectrum distortion waits the validity of parameter index.In addition, the equipment and instrument needed for calibrating installation of the present invention is simple, it is also convenient to build, and can be carried into scene, and can complete the calibrating of foundation pile dynamic measuring instrument at the scene, without the need to delivering to Measurement Laboratory.
Refer to Fig. 2, it is the flow chart that the present invention is applied to the calibration method embodiment of foundation pile dynamic measuring instrument.The present invention also provides a kind of calibration method being applied to foundation pile dynamic measuring instrument, comprises the steps:
Step 1 a: end face guide rail being vertically arranged on standard pile; One weight is set on the guideway, makes it along hammering standard pile after the vertical landing of this guide rail.
Step 2: detect this standard pile by the waveform signal produced after hammering respectively by standard meter and foundation pile dynamic measuring instrument to be measured, and judge by the result comparing detection the accuracy that foundation pile dynamic measuring instrument to be measured is measured.
In step 1, described weight increases from the increase of the vertical height of described standard pile with the quality of weight and weight the hammering energy of described standard pile.Concrete, if set the quality of weight as m, weight is h from the vertical height of described standard pile, and acceleration of gravity is g, then now the gravitional force of described weight is mgh.When weight with zero initial velocity along described in hammering after the vertical landing of described guide rail during standard pile, the gravitional force of described weight will convert kinetic energy to, and according to law of conservation of energy, described weight then meets described standard pile hammering energy W: W=mgh.
The size and shape of described weight can change according to demand, for simulating different surge waveform.In the present embodiment, described weight is a spheroid or Rotary-table or spheroid or cube.
It is adjustable that described weight is arranged on position on described guide rail and described weight from the vertical height of described standard pile, can quantitatively regulate weight to the size of the hammering energy of described standard pile by regulating this height.
In the present invention, described weight is on described guide rail during landing, instantaneous velocity on the diverse location of weight on guide rail is different, its instantaneous energy is also different, namely weight in the mode of transient excitation mode to described standard pile hammering, it can reflect the real work situation of foundation pile dynamic measuring instrument, more accurate to the calibrating of foundation pile dynamic measuring instrument to be measured.
In step 2, described standard meter comprises standard transducer and reference waveform collecting unit; The waveform signal that standard pile produces at the end face of described standard pile, and is sent to the collecting unit of described reference waveform collecting unit and foundation pile dynamic measuring instrument to be measured by the sensor setting of described standard transducer and foundation pile dynamic measuring instrument to be measured respectively.Described standard transducer and reference waveform collecting unit can separately be used alone, to realize demarcating separately the sensor of foundation pile dynamic measuring instrument; Whether meanwhile, described standard transducer and reference waveform collecting unit also can use jointly, to realize effectively demarcating a whole set of foundation pile dynamic measuring instrument, and then effectively judge the validity of the foundation pile dynamic measuring instrument institute mapping spectrum distortion parameter index such as.
Compared to prior art, the present invention replaces existing stable state exciting mode in transient excitation mode, more can reflect the real work situation of foundation pile dynamic measuring instrument to be measured, examines and determine more accurate; Meanwhile, by regulating the quality of weight and height quantitatively to regulate it to the hammering energy of standard pile, the quantitative calibrating of foundation pile dynamic instrument to be measured is achieved.Further, simulate different surge waveforms by difform weight, closer to the actual working state of foundation pile dynamic measuring instrument, calibrating effect is more accurate.
The present invention is not limited to above-mentioned embodiment, if do not depart from the spirit and scope of the present invention to various change of the present invention or distortion, if these are changed and distortion belongs within claim of the present invention and equivalent technologies scope, then the present invention is also intended to comprise these changes and distortion.
Claims (9)
1. be applied to a calibrating installation for foundation pile dynamic measuring instrument, it is characterized in that: comprise standard pile, guide rail, weight and standard meter; Described guide rail is vertically fixed on the end face of described standard pile; Described weight to be arranged on described guide rail and standard pile described in hammering after vertically sliding along this guide rail; Described standard meter and foundation pile dynamic measuring instrument to be measured are separately positioned on standard pile, and detect this standard pile respectively by the waveform signal produced after hammering.
2. the calibrating installation being applied to foundation pile dynamic measuring instrument according to claim 1, is characterized in that: described weight increases from the increase of the vertical height of described standard pile with the quality of weight and weight the hammering energy of described standard pile.
3. the calibrating installation being applied to foundation pile dynamic measuring instrument according to claim 1, is characterized in that: described weight meets the hammering energy W of described standard pile:
W＝mgh
Wherein, m is the quality of weight, and h is the vertical height of weight from standard pile, and g is acceleration of gravity.
4. the calibrating installation being applied to foundation pile dynamic measuring instrument according to Claims 2 or 3, is characterized in that: described standard meter comprises standard transducer and reference waveform collecting unit; The waveform signal that the standard pile of measurement produces at the end face of described standard pile, and is sent to the collecting unit of described reference waveform collecting unit and foundation pile dynamic measuring instrument to be measured by the sensor setting of described standard transducer and foundation pile dynamic measuring instrument to be measured respectively.
5. the calibrating installation being applied to foundation pile dynamic measuring instrument according to claim 4, is characterized in that: also comprise a felt pan; Described felt pan is laid on the end face of described standard pile.
6. the calibrating installation being applied to foundation pile dynamic measuring instrument according to claim 4, is characterized in that: described weight is a spheroid or Rotary-table or spheroid or cube.
7. be applied to a calibration method for foundation pile dynamic measuring instrument, it is characterized in that: comprise the steps:
Step 1 a: end face guide rail being vertically arranged on standard pile; One weight is set on the guideway, makes it along hammering standard pile after the vertical landing of this guide rail;
Step 2: detect this standard pile by the waveform signal produced after hammering respectively by standard meter and foundation pile dynamic measuring instrument to be measured, and judge by the result comparing detection the accuracy that foundation pile dynamic measuring instrument to be measured is measured.
8. the calibration method being applied to foundation pile dynamic measuring instrument according to claim 7, it is characterized in that: in step 1, described weight is static from landing described guide rail, and described weight increases from the increase of the vertical height of described standard pile with the quality of weight and weight the hammering energy of described standard pile.
9. the calibration method being applied to foundation pile dynamic measuring instrument according to claim 7, is characterized in that: in step 1, described weight with zero initial velocity from landing described guide rail, and described weight to the hammering energy W of described standard pile meet:
W＝mgh
Wherein, m is the quality of weight, and h is the vertical height of weight from described standard pile, and g is acceleration of gravity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610066640.1A CN105544623A (en) | 2016-01-29 | 2016-01-29 | Calibrating device and calibrating method applied to dynamic measuring instrument of foundation pile |
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| CN201610066640.1A CN105544623A (en) | 2016-01-29 | 2016-01-29 | Calibrating device and calibrating method applied to dynamic measuring instrument of foundation pile |
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| CN105544623A true CN105544623A (en) | 2016-05-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110670643A (en) * | 2019-09-23 | 2020-01-10 | 朔黄铁路发展有限责任公司 | Method, device and system for detecting bearing capacity of pile group foundation and storage medium |
| CN112880894A (en) * | 2019-11-29 | 2021-06-01 | 哈尔滨工业大学 | Method for measuring residual stress of large-scale high-speed rotation equipment based on ultrasonic superposition principle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110670643A (en) * | 2019-09-23 | 2020-01-10 | 朔黄铁路发展有限责任公司 | Method, device and system for detecting bearing capacity of pile group foundation and storage medium |
| CN112880894A (en) * | 2019-11-29 | 2021-06-01 | 哈尔滨工业大学 | Method for measuring residual stress of large-scale high-speed rotation equipment based on ultrasonic superposition principle |
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