CN212845195U - High-stress soft rock tunnel loosening ring ultrasonic testing acoustic coupling system - Google Patents
High-stress soft rock tunnel loosening ring ultrasonic testing acoustic coupling system Download PDFInfo
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- CN212845195U CN212845195U CN202021849463.2U CN202021849463U CN212845195U CN 212845195 U CN212845195 U CN 212845195U CN 202021849463 U CN202021849463 U CN 202021849463U CN 212845195 U CN212845195 U CN 212845195U
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Abstract
The utility model provides a loose circle ultrasonic testing acoustic coupled system in high stress soft rock tunnel, including the sounding hole that is located the ground, the downthehole stay tube that has put into of sounding, stay tube inside and stay tube and pore wall country rock clearance all are filled with the butter, put into the sound wave test probe that has the collection sound wave velocity value in the stay tube, the stay tube external diameter is less than the diameter in sounding hole, and the internal diameter of stay tube is greater than the test probe external diameter. The utility model utilizes the characteristics of high viscosity and poor fluidity of the butter, can well adapt to the broken rock mass condition, can not leak, and ensures a good sound coupling environment in the measuring hole; the supporting tube is inserted into the measuring hole filled with the grease, so that the risk that a testing instrument is damaged or buried due to collapse of the hole wall in the testing process can be avoided, and the continuity of the testing process is ensured.
Description
Technical Field
The utility model relates to a tunnel engineering construction field and ultrasonic testing field more are concretely relates to high stress soft rock tunnel looseness circle ultrasonic testing acoustic coupling system.
Background
The size of the loose ring of the tunnel surrounding rock is an important basis for designing anchor bolt support parameters. Common surrounding rock loosening ring testing methods comprise a geological radar detection method, a multi-point displacement measurement method, a sound wave method and the like. Compared with other methods, the acoustic wave method has the advantages of high precision, low cost and simple and convenient operation, so that the acoustic wave method is more widely applied.
The good acoustic coupling environment in the acoustic test hole is the basic premise for obtaining ideal results through the acoustic method test. In the traditional method, water is injected into the acoustic logging hole or a water band is filled in the acoustic logging hole, so that the coupling between the acoustic testing probe and the surrounding rock of the hole wall is realized. However, in high stress soft rock tunnels, acoustic manholes present a higher risk of collapse. In order to research the evolution law of the tunnel surrounding rock loosening ring along with the advance of the tunnel face or the extension of time, a plurality of tests are needed for a long time, but the traditional method is easy to collapse in the process, so that the test cannot be carried out. The accuracy of the acoustic wave test can be greatly influenced by the collapse and deformation of the hole wall, and the acoustic wave method test is difficult to develop in the high-stress soft rock tunnel.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a can maintain the acoustic survey hole stable, can guarantee again that the high stress soft rock tunnel of good coupling between acoustic test probe and the pore wall country rock loosens circle ultrasonic testing acoustic coupling method.
The utility model discloses a concrete implementation scheme is: high stress soft rock tunnel looseness circle ultrasonic testing acoustic coupled system, including the sounding hole that is located the ground, the downthehole stay tube that has put into of sounding, stay tube inside and stay tube and pore wall country rock clearance all are full of the butter, the sound wave test probe that has collection sound wave velocity value is put into in the stay tube, and the stay tube external diameter is less than the diameter in sounding hole, and the internal diameter of stay tube is greater than the test probe external diameter.
Further, the outer surface of the supporting tube is provided with an opening.
Furthermore, the end portion of the supporting tube extending into the acoustic hole is fixed with a pulley, a rope is arranged on the periphery of the supporting tube, one end of the rope bypasses the pulley to extend out of the acoustic hole to serve as a force application end, the rope is located in the acoustic hole and connected with the test probe, the test probe can be pulled into the acoustic hole when the force application end pulls the rope, and the rope is positioned at different depth positions in the acoustic hole.
Furthermore, the sound wave test probe is connected with the debugging sound wave test instrument through a lead.
Furthermore, the supporting tube is a hollow round tube made of a non-metal material.
Furthermore, the supporting pipe is a hard PVC pipe.
Compared with the prior art, the utility model discloses following beneficial effect has: the utility model adopts butter to fill in the acoustic survey hole, the butter has the characteristics of large viscosity and poor fluidity, and the butter is adopted to replace water as a medium for providing an acoustic coupling environment, so that the acoustic survey hole can adapt to broken rock mass conditions well, no leakage occurs, and a good acoustic coupling environment in the survey hole is ensured; the supporting tube is inserted into the measuring hole filled with the grease, so that the damage or burying risk of a testing instrument caused by collapse of the hole wall in the testing process can be avoided, and then a testing probe is placed into the acoustic measuring hole to be collected through the tester, so that the continuity of the testing process can be guaranteed.
Drawings
FIG. 1 is a schematic diagram of a butter injection process according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a sound wave testing process according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the acoustic testing process according to a preferred embodiment of the present invention;
FIG. 4 is a schematic diagram of a butter injection process according to a second embodiment of the present invention;
FIG. 5 is a schematic diagram of the sound wave testing process according to the second embodiment of the present invention;
wherein: 1. wall rock of hole wall; 2. sounding the hole; 3. butter; 4. a hose; 5. a pneumatic high-pressure oiling machine; 61. supporting a tube; 62. supporting tubes (the tube wall is provided with a round hole); 7. testing the probe; 8. testing the instrument; 9. testing the lead; 10. water; 11. a pulley mechanism; 12. a rope.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 5, the following figures are combined with the accompanying drawings and embodiments to further explain the present invention.
As described in the background, in high stress soft rock tunnels, sonic testing has been difficult to develop due to the high risk of collapse of the borehole. In order to solve the problem, the utility model provides a can maintain the acoustic survey hole stable, can guarantee again that the high stress soft rock tunnel of good coupling between acoustic test probe and the pore wall country rock loosens circle ultrasonic testing acoustic coupling method.
The first embodiment is as follows: as shown in fig. 1, 2 and 3, a scheme I of an ultrasonic testing acoustic coupling method for a high-stress soft rock tunnel loosening ring comprises an acoustic testing hole in rock and soil, a supporting tube is arranged in the acoustic testing hole, the supporting tube is internally provided with grease in the supporting tube and hole wall surrounding rock gaps, a sound wave testing probe for collecting a sound wave speed value is arranged in the supporting tube, the outer diameter of the supporting tube is smaller than the diameter of the acoustic testing hole, the inner diameter of the supporting tube is larger than the outer diameter of the testing probe, the sound wave testing probe is connected with a debugging sound wave testing instrument through a wire, and the supporting tube is a hollow round tube made of nonmetal materials.
The specific operation steps are as follows:
(1) arranging at least 1 acoustic testing hole 2 at a position to be tested by adopting a drilling machine; the depth of the acoustic measurement hole 2 meets the test requirement, and a test area is formed in the hole wall surrounding rock 1;
(2) grease 3 is filled in the acoustic testing holes 2, so that a good acoustic coupling environment is provided for subsequent acoustic testing; the butter 3 is injected by a pneumatic high-pressure oiling machine 5; the pneumatic high-pressure oiling machine 5 is provided with a hose 4, and the length of the hose 4 is larger than the depth of the sound measuring hole 2.
(3) Inserting a supporting tube 61 into the sounding hole 2 filled with the grease 3, wherein the grease 3 is filled in the supporting tube 61 and gaps between the supporting tube 61 and the hole wall surrounding rock 1; the supporting tube 61 is a hollow round tube made of a non-metal material, the outer diameter of the supporting tube is slightly smaller than the diameter of the sound measuring hole 2, and the inner diameter of the supporting tube is larger than the outer diameter of the test probe 7; forming an acoustic coupling system consisting of three layers of media of butter 3, a support tube 61 and butter 3;
(4) debugging an acoustic wave test instrument 8, and connecting an acoustic wave test probe 7; the test probe 7 extends into the support tube 61 to acquire the wave velocity value of the sound wave.
And (5) continuously repeating the step (4) along with the advancing of the tunnel face or the prolonging of the time, so as to measure the evolution law of the tunnel surrounding rock loosening ring.
In this embodiment, one technical solution of the support tube 61 is to use a rigid PVC tube.
In this embodiment, a pulley mechanism 11 is fixed on the inner side of the inner end of the support tube 61, and a corresponding rope 12 is provided, one end of the rope 12 bypasses the pulley of the pulley mechanism 11 to be a force application end, and the other end is connected with the test probe 7, and is used for pulling the test probe 7 into the hole and positioning the test probe at different depth positions.
A typical implementation manner of the second scheme of the utility model is shown in fig. 4 and 5, and the second scheme of the ultrasonic testing acoustic coupling method for the loosening ring of the high-stress soft rock tunnel comprises 1, hole wall surrounding rock; 2. sounding the hole; 3. butter; 4. a hose; 5. a pneumatic high-pressure oiling machine; 62. Supporting tubes (the tube wall is provided with a round hole); 7. testing the probe; 8. testing the instrument; 9. and testing the lead.
Compared with the first embodiment, the technical scheme is different from the first embodiment in that the pipe wall of the supporting pipe is provided with a round hole, and the operation process comprises the following steps:
(1) arranging at least 1 acoustic testing hole 2 at a position to be tested by adopting a drilling machine; the depth of the sound measuring hole 2 meets the test requirement;
(2) inserting the support tube 62 into the acoustic hole 2; the supporting tube 62 is a hollow round tube made of a non-metal material, a round hole is drilled on the tube wall of the supporting tube 62, the outer diameter of the supporting tube 62 is slightly smaller than the diameter of the sound measuring hole 2, and the inner diameter of the supporting tube 62 is larger than the outer diameter of the test probe 7;
(3) the grease 3 is injected into the support tube 62 after the outer end of the support tube is closed, and the grease 3 in the support tube also penetrates through the circular hole in the tube wall of the support tube 62 to fill the gap between the tube wall and the surrounding rock 1 of the wall of the acoustic hole, so that a good acoustic coupling environment is provided for subsequent acoustic wave tests; grease 3 is injected by a pneumatic high-pressure oiling machine 5, and finally the inside of the supporting tube 62 and gaps between the supporting tube 62 and the hole wall surrounding rock 1 are filled with the grease 3; forming an acoustic coupling system consisting of three layers of media of butter 3, a support tube 62 and butter 3;
(4) debugging an acoustic wave test instrument and connecting an acoustic wave test probe 7; the test probe 7 extends into the support tube 62 to acquire the wave velocity value of the sound wave. And (5) continuously repeating the step (4) along with the advancing of the tunnel face or the prolonging of the time, so as to measure the evolution law of the tunnel surrounding rock loosening ring. One technical solution of the support tube 62 is to use a rigid PVC tube.
Any technical solution disclosed in the present invention is, unless otherwise stated, disclosed a numerical range if it is disclosed, and the disclosed numerical range is a preferred numerical range, and any person skilled in the art should understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Because numerical value is more, can't be exhaustive, so the utility model discloses just disclose some numerical values with the illustration the technical scheme of the utility model to, the numerical value that the aforesaid was enumerated should not constitute right the utility model discloses create the restriction of protection scope.
If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the terms "first" and "second" are used merely to distinguish one element from another in a descriptive sense and are not intended to have a special meaning unless otherwise stated.
Also, above-mentioned the utility model discloses if disclose or related to mutually fixed connection's spare part or structure, then, except that other the note, fixed connection can understand: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In addition, the terms used in any aspect of the present disclosure as described above to indicate positional relationships or shapes include similar, analogous, or approximate states or shapes unless otherwise stated.
The utility model provides an arbitrary part both can be assembled by a plurality of solitary component parts and form, also can be the solitary part that the integrated into one piece technology was made.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (6)
1. High stress soft rock tunnel loose circle ultrasonic testing acoustic coupling system, its characterized in that, including the sounding hole that is located the ground, the downthehole stay tube that has put into of sounding, stay tube inside and stay tube and pore wall country rock clearance all are filled with the butter, the sound wave test probe that has the collection sound wave velocity value of putting into in the stay tube, the stay tube external diameter is less than the diameter in sounding hole, and the internal diameter of stay tube is greater than the test probe external diameter.
2. The high stress soft rock tunnel loosening coil ultrasonic testing acoustic coupling system of claim 1, wherein the support tube outer surface has an opening.
3. The ultrasonic testing acoustic coupling system for the loosening ring of the high-stress soft rock tunnel according to claim 1, wherein a pulley is fixed at the end of the supporting tube extending into the acoustic hole, a rope is arranged on the periphery of the supporting tube, one end of the rope extends out of the acoustic hole by bypassing the pulley to serve as a force application end, the rope is located in the acoustic hole and connected with the testing probe, and the testing probe can be pulled into the acoustic hole and positioned at different depth positions in the acoustic hole when the force application end pulls the rope.
4. The high-stress soft rock tunnel loosening coil ultrasonic testing acoustic coupling system of claim 1, wherein the acoustic test probe is connected with a debugging acoustic test instrument through a wire.
5. The ultrasonic testing acoustic coupling system for the loosening ring of the high-stress soft rock tunnel according to claim 1, wherein the supporting tube is a hollow round tube made of a non-metallic material.
6. The high-stress soft rock tunnel loosening coil ultrasonic testing acoustic coupling system of claim 1 or 2, wherein the support tube is a rigid PVC tube.
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| CN202021849463.2U CN212845195U (en) | 2020-08-31 | 2020-08-31 | High-stress soft rock tunnel loosening ring ultrasonic testing acoustic coupling system |
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| CN202021849463.2U CN212845195U (en) | 2020-08-31 | 2020-08-31 | High-stress soft rock tunnel loosening ring ultrasonic testing acoustic coupling system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111879856A (en) * | 2020-08-31 | 2020-11-03 | 福州大学 | High-stress soft rock tunnel loosening ring ultrasonic testing acoustic coupling method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111879856A (en) * | 2020-08-31 | 2020-11-03 | 福州大学 | High-stress soft rock tunnel loosening ring ultrasonic testing acoustic coupling method |
| CN111879856B (en) * | 2020-08-31 | 2024-06-14 | 福州大学 | Ultrasonic test acoustic coupling method for loose coil of high-stress soft rock tunnel |
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