Electromagnetic wave detection device and method for grouting quality of fabricated structure

Abstract

The invention relates to an electromagnetic wave detection device and method for grouting quality of a fabricated structure, the device comprises a fabricated member, an electromagnetic wave detector and a data processing module, the exterior of the fabricated member is concrete, and the interior of the fabricated member is provided with a special grouting device; the special grouting device comprises a steel sleeve and a plastic head cap, the top of the steel sleeve is sleeved with the plastic head cap, a grouting opening is formed in the bottom of one side wall of the steel sleeve, a slurry discharging opening is formed in the top of one side wall of the plastic head cap, the end of the grouting opening and the end of the slurry discharging opening are both exposed out of concrete, and a steel bar longitudinally penetrates through the plastic head cap and the steel sleeve. A first measuring line is transversely arranged at the position of a plastic head cap of the assembly type component, the electromagnetic wave detector is used for moving along the first measuring line to emit electromagnetic waves to the assembly type component and collecting electromagnetic wave data reflected by the electromagnetic waves, and the data processing module is used for processing the collected electromagnetic wave data and generating a detection report. Compared with an existing detection scheme, the scheme is high in detection accuracy, high in detection efficiency and suitable for field large-area rapid detection.

Description

Technical Field

[0001] The present invention relates to the technical field of grouting quality detection of prefabricated structures, and in particular to an electromagnetic wave detection device and method for grouting quality of prefabricated structures. Background Art

[0002] In prefabricated concrete building structures, vertical steel bar connection is one of the key technologies. Among the existing technologies for vertical steel bar connection, steel bar sleeve grouting connection is the simplest, most convenient and effective. However, this connection technology has a relatively large disadvantage: the grouting material is inside the steel sleeve, and the various existing detection technologies for detecting the fullness of the grouting material inside the steel sleeve all have their own disadvantages.

[0003] The pre-buried steel wire pulling method is used to detect the fullness of the grouting material, which has a certain destructive effect on the integrity of the grouting material in the sleeve and cannot accurately detect the fullness of the grouting material; the X-ray method used to detect the quality of the sleeve grouting is expensive and cumbersome, and it is questionable whether the X-ray can penetrate the steel sleeve; the ultrasonic method is simple and convenient to detect the saturation of concrete, but because the detection accuracy of ultrasonic waves is not accurate enough, its test results cannot guarantee the reliability of the steel bar connection. In this case, the overall safety of the prefabricated concrete structure will be problematic. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In order to solve the above problems in the prior art, the present invention provides an electromagnetic wave detection device and method for the grouting quality of an assembled structure, which can quickly and efficiently detect the quality of the grouting material in the steel sleeve.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned object, a technical solution adopted by the present invention is: an electromagnetic wave detection device for the grouting quality of a prefabricated structure, comprising a prefabricated component, an electromagnetic wave detector and a data processing module, wherein the exterior of the prefabricated component is concrete and a special grouting device is provided inside;

[0008] The special grouting device comprises a steel sleeve and a plastic head cap, the plastic head cap is sleeved on the top of the steel sleeve, a grouting port is provided at the bottom of one side wall of the steel sleeve, a grouting port is provided at the top of one side wall of the plastic head cap, the ends of the grouting port and the grouting port are both exposed to the concrete, the steel bar longitudinally penetrates the plastic head cap and the steel sleeve, a measuring line 1 is horizontally laid out at the position of the plastic head cap of the prefabricated component, the electromagnetic wave detector is used to move along the measuring line 1 to emit electromagnetic waves to the prefabricated component, and collect electromagnetic wave data reflected by the electromagnetic waves, and the data processing module is used to process the collected electromagnetic wave data and generate a detection report;

[0009] The electromagnetic wave detector emits electromagnetic waves at a frequency exceeding 2 GHz.

[0010] The electromagnetic wave detector is a geological radar.

[0011] Furthermore, the data processing module is a GSSI host.

[0012] Another technical solution adopted by the present invention is: an electromagnetic wave detection method for the grouting quality of an assembled structure, comprising:

[0013] S1. Turn on the electromagnetic wave detector and horizontally lay out the measuring line 1 at the plastic head cap position of the prefabricated component according to the preset position of the measuring line 1 in the drawing;

[0014] S2, using an electromagnetic wave detector to move along the measuring line to emit electromagnetic waves toward the assembled component, collecting electromagnetic wave data reflected by the electromagnetic waves, and turning off the electromagnetic wave detector;

[0015] S3. The data processing module processes the collected electromagnetic wave data, determines the fullness of the grouting based on the processing result, and determines whether the grouting quality is qualified based on the fullness of the grouting.

[0016] Furthermore, the electromagnetic wave detector is a geological radar;

[0017] The S3 includes: processing the collected electromagnetic wave data in the data processing module to obtain a radar profile and a radar curve diagram, judging the fullness of the grouting based on the radar profile and the radar curve diagram, and judging whether the grouting quality is qualified based on the fullness of the grouting.

[0018] Furthermore, it also includes:

[0019] S4. The data processing module generates a test report based on the data collected, processed and judged in the above steps.

[0020] (III) Beneficial effects

[0021] The beneficial effect of the present invention is that since electromagnetic waves cannot penetrate the steel sleeve, this solution can overcome this defect well. By installing a plastic head cap on the top of the steel sleeve, the electromagnetic wave can pass through the plastic head cap in the assembled component, and the grouting quality inside the special grouting device can be detected based on the reflected electromagnetic waves. Compared with the existing detection methods, this solution has high detection accuracy and high detection efficiency, and can be applied to large-scale rapid detection on site. Within the effective detection depth of the electromagnetic wave detector, it is suitable for the fullness detection of the grouting material in the special grouting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A longitudinal section view of the first survey line of the prefabricated component set-out of the present invention;

[0023] Figure 2 It is a schematic diagram of the working process of an electromagnetic wave detection device for grouting quality of an assembled structure according to the present invention;

[0024] Figure 3 It is a flowchart of an electromagnetic wave detection method for grouting quality of an assembled structure of the present invention;

[0025] Figure 4 It is a detailed flow chart of an electromagnetic wave detection method for grouting quality of an assembled structure according to the present invention;

[0026] Figure 5 It is a comparative schematic diagram of radar profiles of the plastic head cap without grouting and fully grouting in Example 2;

[0027] Figure 6 A radar curve diagram of a steel sleeve without grouting during a setting out test of the steel sleeve in Example 2;

[0028] Figure 7 It is a radar curve diagram of the steel sleeve filled with grout during the setting out test of the steel sleeve in Example 2;

[0029] Figure 8 It is a radar curve chart of the setting out test of the steel sleeve of the special grouting device in Example 2;

[0030] Fig. 9 It is a radar curve diagram of the cavity defect existing in the plastic head cap of the special grouting device in Example 2 without grouting;

[0031] Fig.10 The radar curve diagram of the plastic head cap of the special grouting device in Example 2 being filled with grout without defects;

[0032] Description of Reference Numerals

[0033] 1. Steel sleeve; 2. Plastic head cap; 3. Grouting material; 4. Grouting port; 5. Grouting outlet; 6. Rebar; 7. Concrete; 8. Special grouting device; 9. Measuring line 1. DETAILED DESCRIPTION

[0034] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0035] Embodiment 1

[0036] Please refer to Figure 1 and Figure 2 As shown, an electromagnetic wave detection device for grouting quality of a prefabricated structure includes a prefabricated component, an electromagnetic wave detector and a data processing module. The outside of the prefabricated component is concrete 7, and a special grouting device 8 is provided inside;

[0037] The special grouting device 8 includes a steel sleeve 1 and a plastic head cap 2, the plastic head cap 2 is sleeved on the top of the steel sleeve 1, a grouting port 4 is provided at the bottom of one side wall of the steel sleeve 1, and a discharge port 5 is provided at the top of one side wall of the plastic head cap 2. The grouting material 3 is poured in through the grouting port 4 and discharged from the discharge port 5. The ends of the grouting port 4 and the discharge port 5 are both exposed to the concrete 7, and the steel bar 6 longitudinally penetrates the plastic head cap 2 and the steel sleeve 1. A measuring line 9 is horizontally laid out at the position of the plastic head cap 2 of the prefabricated component. The electromagnetic wave detector is used to move along the measuring line 9 to emit electromagnetic waves to the prefabricated component and collect electromagnetic wave data reflected by the electromagnetic waves. The data processing module is used to process the collected electromagnetic wave data and generate a detection report.

[0038] Wherein, the frequency of electromagnetic waves emitted by the electromagnetic wave detector exceeds 2 GHz.

[0039] Wherein, the electromagnetic wave detector is a geological radar.

[0040] Wherein, the data processing module is a GSSI host.

[0041] Reference Figure 2 As shown, the GSSI host is used as a data processing module, and an electromagnetic wave detector is used to move along the measuring line 9 to emit electromagnetic waves to the prefabricated components, and the surface echo of the prefabricated components and the target reflection (i.e., the echo of the special grouting device 8) are received. The received data is processed by the GSSI host, and a detection report is obtained after processing.

[0042] Since the existing ultrasonic detection and the electromagnetic wave detection of this scheme have significant differences in wavelength and frequency, this scheme uses electromagnetic waves to detect the grouting quality inside the plastic head cap 2, which is more efficient and accurate than ultrasonic detection of the grouting quality inside the steel sleeve 1.

[0043] Embodiment 2

[0044] Please refer to Figures 3 to 10 As shown, an electromagnetic wave detection method for grouting quality of an assembled structure includes:

[0045] S1. Turn on the electromagnetic wave detector and horizontally lay out the measuring line 1 at the plastic head cap position of the prefabricated component according to the preset position of the measuring line 1 in the drawing;

[0046] S2, using an electromagnetic wave detector to move along the measuring line to emit electromagnetic waves toward the assembled component, collecting electromagnetic wave data reflected by the electromagnetic waves, and turning off the electromagnetic wave detector;

[0047] S3. The data processing module processes the collected electromagnetic wave data, determines the fullness of the grouting based on the processing result, and determines whether the grouting quality is qualified based on the fullness of the grouting.

[0048] Wherein, the electromagnetic wave detector is a geological radar;

[0049] The S3 includes: processing the collected electromagnetic wave data in the data processing module to obtain a radar profile and a radar curve diagram, judging the fullness of the grouting based on the radar profile and the radar curve diagram, and judging whether the grouting quality is qualified based on the fullness of the grouting.

[0050] Among them, it also includes:

[0051] S4. The data processing module generates a test report based on the data collected, processed and judged in the above steps.

[0052] Reference Figure 5 As described above, the left side is a radar profile diagram of the plastic head cap without grouting, and the right side is a radar profile diagram of the plastic head cap filled with grout, so that the grouting condition in the steel sleeve can be analyzed from the radar profile diagram.

[0053] We also conducted electromagnetic wave tests on the steel sleeves of prefabricated components. Figure 6 This is the radar curve of the steel sleeve without grouting. Figure 7 The radar curve diagram of the steel sleeve filled with grouting shows that electromagnetic waves cannot penetrate the steel sleeve to effectively test the grouting quality inside the steel sleeve.

[0054] Figure 8 Radar graph of the test run for the steel sleeve of the special grouting device. Fig. 9 This is a radar curve diagram of the cavity defect in the plastic head cap of the special grouting device. Fig.10 This is a radar curve diagram of the plastic head cap of the special grouting device being filled with grout without defects. It can be seen from this that Figure 8 The amplitude A1 of the radar curve at the steel sleeve is the largest. Fig.10 The amplitude A3 at the middle plastic cap (with a cavity defect) is second. Fig. 9 The amplitude A2 at the plastic cap (without defects) is the smallest, which is consistent with the law of relative dielectric constant change at the interface. Fig.10 The wavelength λ3 of the defect-free part of the plastic cap is the longest. Fig. 9 The wavelength of the hollow defect in the plastic cap is λ2, Figure 8 The wavelength λ1 at the steel sleeve is the shortest.

[0055] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An electromagnetic wave detection device for grouting quality of assembled structures, characterized in that: It includes a prefabricated component, an electromagnetic wave detector and a data processing module, wherein the exterior of the prefabricated component is made of concrete and a special grouting device is provided inside; The special grouting device comprises a steel sleeve and a plastic head cap, the plastic head cap is sleeved on the top of the steel sleeve, a grouting port is provided at the bottom of one side wall of the steel sleeve, a grouting port is provided at the top of one side wall of the plastic head cap, the ends of the grouting port and the grouting port are both exposed to the concrete, the steel bar longitudinally penetrates the plastic head cap and the steel sleeve, a measuring line 1 is horizontally laid out at the position of the plastic head cap of the prefabricated component, the electromagnetic wave detector is used to move along the measuring line 1 to emit electromagnetic waves to the prefabricated component, and collect electromagnetic wave data reflected by the electromagnetic waves, and the data processing module is used to process the collected electromagnetic wave data and generate a detection report; The frequency of the electromagnetic wave emitted by the electromagnetic wave detector exceeds 2 GHz; The electromagnetic wave detector is a geological radar.

2. The electromagnetic wave detection device for grouting quality of prefabricated structures according to claim 1 is characterized in that: The data processing module is a GSSI host.

3. A detection method for the electromagnetic wave detection device for grouting quality of prefabricated structures based on any one of claims 1 to 2, characterized in that: include: S1. Turn on the electromagnetic wave detector and horizontally lay out the measuring line 1 at the plastic head cap position of the prefabricated component according to the preset position of the measuring line 1 in the drawing; S2, using an electromagnetic wave detector to move along the measuring line to emit electromagnetic waves toward the assembled component, collecting electromagnetic wave data reflected by the electromagnetic waves, and turning off the electromagnetic wave detector; S3. The data processing module processes the collected electromagnetic wave data, determines the fullness of the grouting based on the processing result, and determines whether the grouting quality is qualified based on the fullness of the grouting.

4. The electromagnetic wave detection method for grouting quality of prefabricated structures according to claim 3 is characterized in that: The electromagnetic wave detector is a geological radar; The S3 includes: processing the collected electromagnetic wave data in the data processing module to obtain a radar profile and a radar curve diagram, judging the fullness of the grouting based on the radar profile and the radar curve diagram, and judging whether the grouting quality is qualified based on the fullness of the grouting.

5. The electromagnetic wave detection method for grouting quality of prefabricated structures according to claim 3 is characterized in that: Also includes: S4. The data processing module generates a test report based on the data collected, processed and judged in the above steps.

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