CN210953927U - Ground stress is measured and is installed quality detection device with hollow inclusion - Google Patents
Ground stress is measured and is installed quality detection device with hollow inclusion Download PDFInfo
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- CN210953927U CN210953927U CN201920982198.6U CN201920982198U CN210953927U CN 210953927 U CN210953927 U CN 210953927U CN 201920982198 U CN201920982198 U CN 201920982198U CN 210953927 U CN210953927 U CN 210953927U
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Abstract
The utility model discloses a quality detection device is installed with hollow inclusion to ground stress measurement, including hollow inclusion stressometer, ultrasonic emission probe and ultrasonic wave receiving probe, ultrasonic emission probe with ultrasonic wave receiving probe install in the afterbody of meeting an emergency of hollow inclusion stressometer to be connected with supersonic generator through the data line. The utility model discloses can install under the condition in the drilling at hollow inclusion stressometer, collect time and signal power that stress flower department ultrasonic wave propagated in the air and in the colloid to staff's accessible contrast these signals differentiates that hollow inclusion installation quality is good or bad, improves test success rate and rate of accuracy.
Description
Technical Field
The utility model relates to a rock mass ground stress test technical field, more specifically relates to a ground stress is hollow inclusion installation quality detection device and detection method for measurement.
Background
The stress test is an important parameter for engineering rock stability analysis and engineering design, at present, the ground stress test is a commonly used trepanning stress relief method, the trepanning stress relief method mainly comprises the steps of drilling large holes, grinding hole bottoms to be flat, drilling small-aperture positioning holes, drilling small holes, installing a hollow inclusion, relieving trepanning and the like, however, the installation of the hollow inclusion in the actual engineering is difficult mainly due to the fact that ① is difficult to ensure that the large holes and the small holes are concentric holes in the actual drilling process, ② installation supports are small to cause the hollow inclusion to be deviated to one side, the transition conical hole wall between ③ large holes and small holes is not smooth and has step change, and due to the reasons, in the actual installation process, a strain gauge section of the hollow inclusion is not completely adhered to the rock body by glue or is not fully adhered, so that test data are not accurate or reinstallated, the construction period is prolonged, and the test.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to overcome prior art's not enough, provide a hollow inclusion installation quality detection device and detection method for ground stress measurement.
In order to solve the technical problem, the utility model discloses a following technical scheme:
the device comprises a hollow inclusion stressometer, an ultrasonic transmitting probe and an ultrasonic receiving probe, wherein the ultrasonic transmitting probe and the ultrasonic receiving probe are arranged at the tail part of a strain rosette of the hollow inclusion stressometer and are connected with an ultrasonic generator through a data line.
Furthermore, the ultrasonic transmitting probes and the ultrasonic receiving probes are provided with three groups, and the three groups are distributed along an epoxy resin cylinder of the hollow inclusion stressometer at 120 degrees
Furthermore, a plastic cylinder is sleeved in the epoxy resin cylinder.
Furthermore, the ultrasonic transmitting and receiving probe is embedded into the epoxy resin cylinder, and the upper surface of the ultrasonic transmitting and receiving probe and the outer wall of the sleeve form a smooth surface without bulges.
Furthermore, a gap exists between the lower surface of the ultrasonic transmitting and receiving probe and the plastic cylinder.
Further, the data line is arranged inside the epoxy resin barrel and extends outwards along the axial direction of the barrel.
The utility model discloses can install under the condition in the drilling at hollow inclusion stressometer, collect time and signal power that stress flower department ultrasonic wave propagated in the air and in the colloid to staff's accessible contrast these signals differentiates that hollow inclusion installation quality is good or bad, improves test success rate and rate of accuracy.
Drawings
Fig. 1 is a schematic structural view of a detection device provided by the present invention;
FIG. 2 is a diagram showing the position distribution of strain flowers in a hollow bag body, an ultrasonic transmitting probe and an ultrasonic receiving probe;
FIG. 3 is a cross-sectional view of a hollow core inclusion A-A.
Detailed Description
The present invention will be further explained with reference to the drawings and examples. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
As shown in fig. 1, a hollow inclusion installation quality detection device for ground stress measurement, which comprises a hollow inclusion stressometer, wherein the hollow inclusion stressometer is similar to the hollow inclusion stressometers in the prior art, and comprises a guide head 1, a sealing ring 2, a glue outlet hole 3, a plunger 4, a fixing pin 5, a glue 6, an epoxy resin cylinder 7, a sealing ring 8, a directional pin 9, a lead 10, a plastic cylinder 16 sleeved inside the epoxy resin cylinder 7, and a strain flower 11 arranged on the surface of the epoxy resin cylinder 7, wherein the tail part of the strain flower 11 is provided with an ultrasonic emission probe 14 and an ultrasonic receiving probe 15; the ultrasonic transmitting probe 14 and the ultrasonic receiving probe 15 are embedded in the epoxy resin sleeve, and the upper surface of the ultrasonic transmitting probe and the outer wall of the epoxy resin sleeve form a smooth surface without bulges; a gap exists between the lower surface of the hollow bag body stress meter and the plastic cylinder body, so that the ultrasonic transmitting probe 14 and the ultrasonic receiving probe 15 cannot be damaged by extrusion, and meanwhile, after the hollow bag body stress meter is installed, the epoxy resin cylinder 7 can be completely attached to the wall of the hole.
In this embodiment, three groups of strain patterns 11 are arranged, each group of strain patterns is provided with four strain gauges, the strain patterns 11 are adhered along the circumference of the epoxy resin cylinder 7 at intervals of 120 degrees, then an epoxy resin is poured into an outer layer with the thickness of 0.5mm to enable the strain gauges to be embedded in the cylinder wall, similarly, the ultrasonic transmitting probe 14 and the ultrasonic receiving probe 15 are also embedded in the cylinder wall, and two groups of strain patterns are distributed along the circumference of the epoxy resin cylinder 7 at intervals of 120 degrees and correspond to each group of strain patterns; the ultrasonic transmitting probe 14 and the ultrasonic receiving probe 15 are both connected with the ultrasonic transmitter 13 through the data line 12 running along the inner wall of the epoxy resin cylinder 7, wherein the ultrasonic transmitting probe 14 is excited to transmit an ultrasonic signal, and the ultrasonic receiving probe 15 receives the signal and transmits the signal to the ultrasonic transmitter 13, so that the waveform of the signal can be displayed.
The specific implementation manner of the utility model is as follows:
firstly, drilling concentric holes with different sizes according to a traditional trepanning stress relief method, preparing glue, and sending a hollow inclusion into the small holes, specifically: the inner cavity of the epoxy resin cylinder 7 is filled with the viscose 6, the plunger 4 is inserted into the inner cavity of the epoxy resin cylinder 7 at a certain depth and fixed by the fixing pin 5 (the fixing pin is generally an aluminum wire easy to cut off), then the hollow inclusion strain gauge is sent to a preset position in the drill hole, and at the moment, the colloid is not extruded yet.
Then, the ultrasonic transmitter 13 is connected to the ultrasonic transmitting probe 14 and the ultrasonic receiving probe 15 via the data line 12, the switch of the ultrasonic transmitter 13 is turned on, the ultrasonic wave is excited at the ultrasonic transmitting probe 14, the ultrasonic wave propagates to the ultrasonic receiving probe 15 in the air, an ultrasonic waveform signal is displayed on the screen of the ultrasonic transmitter 13, the waveform signal is stored, and the ultrasonic transmitter 13 is turned off.
Then, the long mounting rod is pushed by force to push the plunger 4, the fixing pin 5 can be cut off, the pushing is continued, the adhesive 6 is extruded into the small hole of the plunger 4, then flows out of the adhesive outlet hole 3 and flows into a gap between the stress gauge and the hole wall of the drilled hole, the waiting time is 5-6 minutes, and the adhesive is estimated to flow down to the fixing positions of the strain gage 11, the ultrasonic transmitting probe 14 and the ultrasonic receiving probe 15 along the surface of the hollow bag body.
Then, the switch of the ultrasonic transmitter 13 is turned on, ultrasonic waves are excited at the ultrasonic transmitting probe 14, the ultrasonic waves propagate in the air or in the colloid to the ultrasonic receiving probe 15, and an ultrasonic waveform signal is displayed on the screen of the ultrasonic transmitter 13 and stored.
Finally, comparing the waveform signals twice, obtaining interval time and signal strength information, and judging the installation quality through the interval time and the signal strength, wherein the specific judging mode is as follows:
(1) and (3) judging through the interval time: because the positions of the ultrasonic transmitting probe 14 and the ultrasonic receiving probe 15 are fixed, the distance is known, and then the ultrasonic transmission speed can be obtained according to the interval time, if the speed is equivalent to the colloid propagation speed measured in a laboratory, the strain flower part of the hollow bag body is well adhered.
(2) The judgment is carried out according to the strength of the waveform signal: continuously exciting and receiving ultrasonic waves for two minutes, and seeing whether the amplitude of the waveform changes greatly: if the waveform changes greatly, the colloid flows, and the complete coverage is not good; if the wave amplitude is almost unchanged, the colloid is completely covered, namely the strain flower part of the hollow inclusion is well stuck.
The two modes are combined for judgment, the result can be more accurate, and because the ultrasonic transmitting probe 14 and the ultrasonic receiving probe 15 are arranged at the tail part of the strain rosette 11, the two probes are completely covered by the adhesive, and the strain gages on each group of strain rosettes 11 which are closer to the adhesive outlet 3 can be judged to be fully covered by the adhesive.
It should be understood that the above examples are only for clearly illustrating the technical solutions of the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (6)
1. The device for detecting the installation quality of the hollow inclusion for measuring the ground stress comprises a hollow inclusion stressometer and is characterized by further comprising an ultrasonic transmitting probe and an ultrasonic receiving probe, wherein the ultrasonic transmitting probe and the ultrasonic receiving probe are installed at the tail part of a strain rosette of the hollow inclusion stressometer and are connected with an ultrasonic generator through data lines.
2. The hollow enclosure installation quality detection device of claim 1, wherein three sets of ultrasonic emission probes and ultrasonic reception probes are arranged, and are distributed along the epoxy resin barrel of the hollow enclosure strain gauge at 120 °.
3. The hollow inclusion installation quality detection device of claim 2, wherein a plastic cylinder is sleeved in the epoxy cylinder.
4. The apparatus of claim 3, wherein the ultrasonic transmitting and receiving probe is embedded in the epoxy resin cartridge, and the upper surface of the ultrasonic transmitting and receiving probe and the outer wall of the cartridge form a smooth surface without protrusions.
5. The hollow enclosure installation quality detection device of claim 4, wherein a gap exists between the lower surface of the ultrasonic transmitting and receiving probe and the plastic cylinder.
6. The hollow enclosure mounting quality inspection device of claim 1, wherein the data line is disposed inside an epoxy cartridge extending outward in a cartridge axial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920982198.6U CN210953927U (en) | 2019-06-27 | 2019-06-27 | Ground stress is measured and is installed quality detection device with hollow inclusion |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920982198.6U CN210953927U (en) | 2019-06-27 | 2019-06-27 | Ground stress is measured and is installed quality detection device with hollow inclusion |
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| CN210953927U true CN210953927U (en) | 2020-07-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110376287A (en) * | 2019-06-27 | 2019-10-25 | 湖南科技大学 | A kind of geostress survey Tubular Yarn installation quality detection device and detection method |
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2019
- 2019-06-27 CN CN201920982198.6U patent/CN210953927U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110376287A (en) * | 2019-06-27 | 2019-10-25 | 湖南科技大学 | A kind of geostress survey Tubular Yarn installation quality detection device and detection method |
| CN110376287B (en) * | 2019-06-27 | 2024-01-23 | 湖南科技大学 | Device and method for detecting installation quality of hollow inclusion for ground stress measurement |
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