CN114487099A - Nondestructive detection system and detection method for sleeve grouting quality - Google Patents

Nondestructive detection system and detection method for sleeve grouting quality Download PDF

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CN114487099A
CN114487099A CN202111649325.9A CN202111649325A CN114487099A CN 114487099 A CN114487099 A CN 114487099A CN 202111649325 A CN202111649325 A CN 202111649325A CN 114487099 A CN114487099 A CN 114487099A
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sleeve
prefabricated
measuring
sensor
data
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郭天惠
吴佳晔
黄伯太
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Chengdu Shengtuo Engineering Testing Co ltd
Guizhou Jiaotong College
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Chengdu Shengtuo Engineering Testing Co ltd
Guizhou Jiaotong College
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • G01N29/045—Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
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Abstract

The invention discloses a sleeve grouting quality nondestructive detection system which comprises a prefabricated part base, wherein a prefabricated structure is arranged on the prefabricated part base, a sleeve is arranged in the prefabricated structure, a detection system for detecting grouting quality in the sleeve is arranged in the sleeve, the detection system comprises a data analysis and processing device, a data acquisition unit, a sensor and an excitation hammer, the sensor is connected with the data acquisition unit, and the data acquisition unit is connected with the data analysis and processing device. The detection method of the detection system comprises the following steps: s1, drawing a measuring line; s2, drawing measuring points and numbering; s3, connecting a signal transmission line; s4, turning on a power supply of the data collector; s5, exciting to generate an elastic wave signal; s6, transmitting elastic wave signals; s7, measuring dense position frequency spectrum inertia moment IMSiAnd spectral concentration IHSiA value; s8, calculating the average value
Figure DDA0003446366770000011
S9, testing signal frequency spectrum inertia moment of the sleeve to be tested
Figure DDA0003446366770000012
And spectral concentration ratio IHSMeasure iA value; s10, calculating grouting index
Figure DDA0003446366770000013
The detection system and the detection method can quickly calculate the grouting index of the measuring point
Figure DDA0003446366770000014
The detection precision is high.

Description

Nondestructive detection system and detection method for sleeve grouting quality
Technical Field
The invention relates to the technical field of sleeve grouting quality detection of an assembly structure, in particular to a sleeve grouting quality nondestructive detection system and a detection method thereof.
Background
The Prefabricated Concrete structure is a Concrete structure formed by using Prefabricated Concrete members as main members, assembling, connecting and combining parts by means of cast-in-place. PC engineering is widely applied overseas as a new green environment-friendly energy-saving building in the current world building field. China has been greatly developed in recent years, and particularly, the Ministry of housing and construction promulgates 'technical rules of prefabricated concrete structures' (JGJ1-2014) in 2014, which indicates that the field has entered the rapid development stage in China.
The bearing capacity of the structure is directly influenced by the steel bar sleeve connection and the grouting compactness of the sleeve connection, and the steel bar sleeve connection and the grouting compactness are one of the most key quality points. In JGJ1-2014, it is required to be subjected to total number detection.
However, the detection of the plumpness of the sleeve grouting material is very difficult, and although methods such as an X-ray industrial CT method, an embedded sensor method, an embedded steel wire drawing method, an X-ray film imaging method and the like are proposed in the industry, the methods have the application range and characteristics, the detection cost is high, and the detection precision is low. With the great application of the fabricated structure in the industries of buildings, railways and the like, the structure types of the fabricated structure become diversified, such as columns, walls, plates and the like, the arrangement of sleeve/grout anchor pore passages at the connecting part of the fabricated structure is also diversified, such as single-row arrangement, side-by-side arrangement, quincuncial arrangement, annular arrangement and the like, and the detection difficulty of grouting compactness is increased.
Disclosure of Invention
The invention aims to solve the technical problem of providing a sleeve grouting quality nondestructive testing system and a detection method thereofWhen the grouting quality in the sleeve is flawless, the detection system and the detection method thereof excite the vibration through the measuring line position projected by the sleeve structure to generate an elastic wave signal, and the frequency spectrum width characteristic index IMS after the frequency spectrum analysisiAnd concentration index IHSiCan change and can quickly calculate the grouting index PRO of the measuring pointiThe detection system and the detection method thereof are simple to operate, low in detection cost and capable of improving the detection precision.
In order to solve the technical problem, the scheme of the invention is as follows:
the utility model provides a sleeve slip casting quality nondestructive test system, includes the prefab base, be provided with the prefabricated construction on the prefab base, the inside sleeve that disposes of prefabricated construction, the sleeve disposes the detecting system who carries out the detection to grouting quality in it, detecting system includes data analysis processing apparatus, data collection station, sensor and excitation hammer, the sensor with data collection station connects, data collection station with data analysis processing apparatus connects.
The axial direction of the sensor is perpendicular to the test surface of the prefabricated structure.
The prefabricated structure is a prefabricated column structure or a prefabricated wall structure.
The arrangement structure of the sleeves in the prefabricated column structure or the prefabricated wall structure is one of a single-row sleeve structure and a double-row sleeve structure.
The data analysis processing device is a machine with a calculation and analysis function, including a notebook computer.
A detection method of a sleeve grouting quality nondestructive detection system comprises the following steps:
s1, drawing a projection line of a sleeve to be tested on the test surface of the prefabricated structure, namely a test line;
s2, drawing measuring points on the measuring lines at fixed intervals, fully distributing the measuring lines, and numbering in sequence;
s3, connecting a sensor, a data acquisition unit and a data analysis processing device;
s4, turning on a power supply of the data collector;
s5, moving the sensor to a position which is more than 30cm away from a measuring point at the highest position of a measuring line or a sleeve grouting compact position, fixing, knocking at a position close to the measuring point by using an exciting vibration hammer at a fixed interval, and exciting the surface of the prefabricated structure to generate and transmit an elastic wave signal after the prefabricated structure is knocked by the exciting vibration hammer;
s6, the sensor picks up the elastic wave signal and transmits the elastic wave signal to the data acquisition unit, the data acquisition unit amplifies, converts and stores the signal, and meanwhile, the signal is transmitted to the data analysis processing device;
s7, the data analysis and processing device analyzes and processes the measured data to obtain a signal frequency spectrum inertia moment IMS of the compact positioniAnd spectral concentration IHSiA value;
s8, finishing not less than 3 times of operations S5, S6 and S7, and calculating an average value
Figure BDA0003446366750000021
S9, fixing the sensor (11) at the measuring points, and testing all the measuring points according to S5 and S6 to obtain the signal spectrum inertia moment of each measuring point
Figure BDA0003446366750000022
And spectral concentration ratio IHSMeasure iA value;
s10, calculating the grouting indexes of all measuring points through the data analysis processing device 10 by using the data signals transmitted by the data acquisition unit 9
Figure BDA0003446366750000023
Figure BDA0003446366750000031
Figure BDA0003446366750000032
Figure BDA0003446366750000033
In the formula, IMSMeasure iIHS is the spectral width of the ith measurement pointMeasurement of iiThe spectral concentration at the ith station. The measuring line is arranged on the surface of the prefabricated structure and is positioned in the projection area of the sleeve.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the grouting quality of the sleeve can be effectively detected through the detection system and the detection method; specifically, when the grouting quality in the sleeve is detected to be flawless, the sleeve structure is excited at the projected measuring line position to generate an elastic wave signal, and the frequency spectrum width characteristic index IMS is obtained after frequency spectrum analysisiAnd concentration index IHSiCan change and can quickly calculate the grouting index of the measuring point
Figure BDA0003446366750000034
The detection system and the detection method thereof are simple to operate, low in detection cost and high in detection precision.
Drawings
FIG. 1 is a structural connection diagram of the present invention;
FIG. 2 is a test waveform of the present invention;
FIG. 3 is a graph of the results of the sleeve grouting test of the present invention.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, and is not intended to limit the present invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, a nondestructive detection system for sleeve grouting quality comprises a prefabricated part base 1, a prefabricated structure 2 is arranged on the prefabricated part base 1, a sleeve 4 is arranged in the prefabricated structure 2, the sleeve 4 is provided with a detection system for detecting the grouting quality in the sleeve, the detection system comprises a data analysis processing device 10, a data acquisition device 9, a sensor 11 and a vibration exciter 12, the sensor 11 is connected with the data acquisition device 9, and the data acquisition device 9 is connected with the data analysis processing device 10.
The exciting hammer 12 is used for generating signals, the sensor 11 is used for picking up exciting signals, the data acquisition unit 9 comprises a software system for collecting and storing exciting signal data, a device for amplifying and converting test signals and a conversion system for carrying out analog/digital signals on the test signals, and the data analysis processing device 10 is used for analyzing and processing the test data.
The axial direction of the sensor 11 is perpendicular to the test surface of the prefabricated construction 2.
The prefabricated structure 2 is a prefabricated column structure or a prefabricated wall structure.
The arrangement structure of the sleeves 4 in the prefabricated column structure or the prefabricated wall structure is one of a single-row sleeve structure and a double-row sleeve structure.
The data analysis processing device 10 is a device having a calculation and analysis function including a notebook computer.
A detection method of a sleeve grouting quality nondestructive detection system comprises the following steps:
s1, drawing a projection line of a tested sleeve 4 on the test surface of the prefabricated structure 2, namely a measuring line 8;
s2, drawing measuring points on the measuring line 8 at fixed intervals, fully distributing the measuring lines, and numbering in sequence;
s3, connecting a sensor 11, a data acquisition unit 9 and a data analysis processing device 10;
s4, turning on a power supply of the data collector 9;
s5, moving the sensor 11 to a position which is more than 30cm away from a measuring point at the highest position of a measuring line or a sleeve grouting compact position, fixing, knocking at a position close to the measuring point by using an exciting hammer 12 at a fixed interval, and exciting the surface of the prefabricated structure 2 to generate and transmit an elastic wave signal after the prefabricated structure 2 is knocked by the exciting hammer 12;
s6, the sensor 11 picks up the elastic wave signal and transmits the elastic wave signal to the data acquisition unit 9, the data acquisition unit 9 amplifies, converts and stores the signal, and meanwhile, the signal is transmitted to the data analysis processing device 10;
s7, the data analysis and processing device 10 analyzes and processes the measured data to obtain the signal frequency spectrum inertia moment IMS of the compact positioniAnd spectral concentration IHSiA value;
s8, finishing not less than 3 times of operations S5, S6 and S7, and calculating an average value
Figure BDA0003446366750000041
S9, fixing the sensor 11 at the measuring points, and testing all the measuring points according to S5 and S6 to obtain the signal spectrum inertia moment of each measuring point
Figure BDA0003446366750000042
And spectral concentration ratio IHSMeasure iA value;
s10, calculating the grouting indexes of all measuring points through the data analysis processing device 10 by using the data signals transmitted by the data acquisition unit 9
Figure BDA0003446366750000043
Figure BDA0003446366750000051
Figure BDA0003446366750000052
Figure BDA0003446366750000053
In the formula, IMSMeasure iIHS is the spectral width of the ith measurement pointMeasurement of iiThe spectral concentration at the ith station.
The following is the application of the detection method of the detection system in reality:
the bridge pier of a large bridge of a highway adopts an assembled prefabricated column,the horizontal section of the prefabricated column is rectangular, the size of the prefabricated column is 1.7m by 1.7m, the diameter of the sleeve is 9.5cm, and the sleeves are arranged side by side. Performing field test on a certain sleeve 3 of the object, drawing a projection position (namely measuring lines 8 with the interval of measuring points of 5 mm) on the test surface of the sleeve 3 before the test, arranging 15 measuring points 7, calibrating 5 points at a grouting compact position, and performing IMS (IP multimedia subsystem) at the compact positionDensification of、IHSDensification ofPlease refer to table 1 for calculation results. The sleeve is tested on site by using a compact position calibration result, a test oscillogram is shown in figure 2, and the sleeve is tested from bottom to top during testing. Fig. 3 and table 2 show the actual measurement results. From the results:
15-point test results PRO of the SleeveiPlease refer to table 2. In the test result, indexes of the measuring points 9-15 positioned at the upper part of the sleeve are obviously lower than those of the measuring points 1-8 positioned at the lower part, but indexes of most measuring points are higher, which indicates that the grouting material is layered to a certain extent, and the upper part test index is lower due to the influence of gravity and accords with the actual condition.
From the test result, this application can effectively detect telescopic slip casting quality.
According to the invention, the grouting quality of the sleeve can be effectively detected by the monitoring system and the detection method; specifically, when the grouting quality inside the sleeve is detected to be flawless, the vibration is excited at the position of a measuring line projected by the sleeve structure, the generated elastic wave signal is subjected to spectrum width characteristic index IMS after spectrum analysisiAnd concentration index IHSiThe change can occur, and the grouting index PRO of the measuring point can be rapidly calculated by combining the characteristics of no pore passageiThe detection system and the detection method thereof are simple to operate, low in detection cost and capable of improving the detection precision.
TABLE 1 dense pore calibration results
Measuring pointNumbering IMSDensification of IHSDensification of
0 11.28 0.24
1 13.52 0.21
2 11.26 0.17
3 12.45 0.18
4 12.42 0.16
Mean value 12.186 0.192
TABLE 2 sleeve grouting index analysis results
Measuring point PRO Measuring point PRO
1 2.46 9 0.88
2 1.46 10 0.65
3 2.59 11 0.70
4 1.70 12 0.91
5 1.31 13 0.59
6 1.78 14 0.14
7 1.06 15 0.68
8 1.88
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and these embodiments are still within the scope of the invention.

Claims (7)

1. The utility model provides a sleeve slip casting quality nondestructive test system which characterized in that: including prefab base (1), be provided with prefabricated construction (2) on prefab base (1), prefabricated construction (2) inside disposes sleeve (4), sleeve (4) dispose the detecting system who carries out the detection to its interior slip casting quality, detecting system includes data analysis processing apparatus (10), data collection station (9), sensor (11) and excitation hammer (12), sensor (11) with data collection station (9) are connected, data collection station (9) with data analysis processing apparatus (10) are connected.
2. The sleeve grouting quality nondestructive testing system according to claim 1, characterized in that: the axial direction of the sensor (11) is perpendicular to the test surface of the prefabricated structure (2).
3. The sleeve grouting quality nondestructive testing system according to claim 1, characterized in that: the prefabricated structure (2) is one of a prefabricated column structure and a prefabricated wall structure.
4. The sleeve grouting quality nondestructive testing system according to claim 3, characterized in that: the arrangement structure of the sleeves (4) in the prefabricated column structure or the prefabricated wall structure is one of a single-row sleeve structure and a double-row sleeve structure.
5. The sleeve grouting quality nondestructive testing system according to claim 1, characterized in that: the data analysis processing device (10) is a device having a calculation and analysis function including a notebook computer.
6. The detection method of the sleeve grouting quality nondestructive detection system according to any one of claims 1 to 5, characterized in that: the method comprises the following steps:
s1, drawing a projection line of a sleeve (4) to be tested on the test surface of the prefabricated structure (2), namely a test line (8);
s2, drawing measuring points on the measuring line (8) at fixed intervals, fully distributing the measuring lines, and numbering in sequence;
s3, connecting a sensor (11), a data acquisition unit (9) and a data analysis processing device (10);
s4, turning on a power supply of the data acquisition unit (9);
s5, moving the sensor (11) to a position which is more than 30cm away from a measuring point at the highest position of a measuring line or a sleeve grouting compact position, fixing, knocking at a position close to the measuring point by using an excitation hammer (12) at a fixed interval, and exciting the surface of the prefabricated structure (2) to generate and transmit an elastic wave signal after the prefabricated structure (2) is knocked by the excitation hammer (12);
s6, the sensor (11) picks up the elastic wave signal and transmits the elastic wave signal to the data acquisition unit (9), the data acquisition unit (9) amplifies, converts and stores the signal, and meanwhile, the signal is transmitted to the data analysis processing device (10);
s7, the data analysis and processing device (10) analyzes and processes the measured data to obtain a signal frequency spectrum inertia moment IMS of the compact positioniAnd spectral concentration IHSiA value;
s8, finishing not less than 3 times of operations S5, S6 and S7, and calculating an average value
Figure FDA0003446366740000021
S9, fixing the sensor (11) at the measuring point and performing measurement according to the sequence S5,S6, testing all the measuring points to obtain the signal frequency spectrum inertia moment of each measuring point
Figure FDA0003446366740000025
And spectral concentration ratio IHSMeasure iA value;
s10, calculating the grouting indexes of all measuring points through the data analysis processing device (10) by using the data signals transmitted by the data acquisition unit (9)
Figure FDA0003446366740000026
Figure FDA0003446366740000022
Figure FDA0003446366740000023
Figure FDA0003446366740000024
In the formula, IMSMeasure iIHS is the spectral width of the ith measurement pointMeasurement of iiThe spectral concentration at the ith station.
7. The detection method of the sleeve grouting quality nondestructive detection system according to claim 6, characterized in that: the measuring line (8) is arranged on the surface of the prefabricated structure (2) and is located in the projection area of the sleeve (4).
CN202111649325.9A 2021-12-30 2021-12-30 Nondestructive detection system and detection method for sleeve grouting quality Pending CN114487099A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115561307A (en) * 2022-12-01 2023-01-03 安徽数智建造研究院有限公司 Grouting compactness detection method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115561307A (en) * 2022-12-01 2023-01-03 安徽数智建造研究院有限公司 Grouting compactness detection method

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