CN209446157U - Wall Rock of Tunnel velocity of wave and relaxation zone thickness testing device - Google Patents
Wall Rock of Tunnel velocity of wave and relaxation zone thickness testing device Download PDFInfo
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- CN209446157U CN209446157U CN201920295361.1U CN201920295361U CN209446157U CN 209446157 U CN209446157 U CN 209446157U CN 201920295361 U CN201920295361 U CN 201920295361U CN 209446157 U CN209446157 U CN 209446157U
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Abstract
The utility model provides a kind of Wall Rock of Tunnel velocity of wave and relaxation zone thickness testing device, including acoustic receiver device, air charging system, signal sampler, signal excitation device, scalable connecting rod, at least two acoustic receiver devices are set in borehole wall after being concatenated by scalable connecting rod, acoustic receiver device includes acoustic wave transducer, the expandable air bag of volume, and each air bag is connected to after being concatenated by air bag tracheae with air charging system；Signal excitation device is used to excite acoustic signals in the outer palisades that tap of drilling, and the acoustic wave transducer converts electric signal for the acoustic signals and export to signal sampler for receiving the acoustic signals.The utility model solves the problems, such as that the problem of rock mass velocity test in drilling under anhydrous condition cannot be tested and rock mass velocity Wall Rock of Tunnel rock mass velocity smaller than the velocity of wave of water cannot test.
Description
Technical field
The utility model relates to acoustic wave of rock wave velocity test technique field, specifically a kind of Wall Rock of Tunnel velocity of wave and relaxation zone
Thickness testing device.
Background technique
It is influenced by factors such as blasting vibration and off-loads, the Mechanical Characters of Composite Ground of rock mass can be sent out in tunnel cavern periphery a certain range
Raw obvious deterioration, commonly referred to as relaxation zone or relaxation circle, relaxation zone thickness and its Mechanical Characters of Composite Ground are the important of surrounding rock supporting parameter
Foundation.To carry out relaxation zone thickness test job after cavern excavation, it is whether reasonable to verify supporting parameter.
Currently, relaxation zone test both at home and abroad is all made of borehole sonic method measuring technology, the rock mass velocity obtained according to test
Relaxation zone thickness is divided with the variation tendency of hole depth, and utilizes the character of the situation of change of velocity of wave evaluation rock mass.Conventional method
Concrete operations it is as follows: first estimate surrounding rock of chamber relaxation zone thickness, in cavern's surface drilling, drilling depth should be much larger than estimating pine
Moving-coil thickness, drilling hole is interior to be rinsed well with clear water, and fills clear water, by the double energy converters of receiving of a hair (by a transmitting transducer
Energy converter composition is received with two) it is placed on the predetermined position in drilling, transmitting transducer emits acoustic signals, normal condition
Under, rock mass velocity is greater than the velocity of wave of water, and acoustic signals are in communication process, and encountering water and the wall of a borehole rock mass can reflect, shape
The slide wave that the interface of Cheng Yanshui and rock is propagated, slide wave is slided forward with rock mass velocity, than the direct wave propagated in water
Spread speed is fast, and slide wave reaches receiving sensor at first, and the preliminary wave read in the waveform that receiving sensor receives reaches
Time, and receive spacing between energy converters using two, rock mass velocity can be calculated, a mobile hair is double to receive energy converters to next
A position similarly can get the value of wave speed of another measuring point, finally, drawing hole depth velocity of wave curve, be become according to the variation of hole depth velocity of wave
Gesture can determine relaxation zone thickness, and according to the absolute value of velocity of wave, evaluate the character of rock mass.Traditional Measure Technology for Loose Circle of Crush
Key point is must to make couplant with water, and using the small formation refracting interface of the ripple ratio rock mass velocity of water, wave produces at interface
Raw slide wave obtains rock mass velocity in turn.
But encounter Rock Mass Integrality it is poor, drilling cannot store water and rock mass velocity (such as mud stone class) than the velocity of wave of water
(refracting interface cannot be formed) in the case where small, traditional technology cannot effectively obtain rock mass velocity, and then cannot divide hole
Room wall rock loosening ring.
Utility model content
The purpose of this utility model is to provide a kind of Wall Rock of Tunnel velocity of wave and relaxation zone thickness testing devices, solve brill
The problem of rock mass velocity test in hole under anhydrous condition cannot be tested, also solves rock mass velocity tunnel smaller than the velocity of wave of water and encloses
The problem that rock rock mass velocity cannot be tested, test result really can efficiently measure surrounding rock of chamber relaxation zone thickness and character.
In order to solve the above technical problems, the utility model adopts the following technical solution:
A kind of Wall Rock of Tunnel velocity of wave and relaxation zone thickness testing device, including acoustic receiver device, air charging system, signal are adopted
Collect instrument, signal excitation device, scalable connecting rod, at least two acoustic receiver devices are set to after concatenating by scalable connecting rod
In borehole wall, the acoustic receiver device includes acoustic wave transducer, the expandable air bag of volume, and each air bag passes through air bag gas
It is connected to after pipe concatenation with air charging system, air charging system is by inflating air bag, expanding air bag and then making acoustic wave transducer and bore
Hole wall surface is in close contact；The signal excitation device includes hammering vibration source and trigger switch, and the hammering vibration source is for boring
Palisades are tapped outside hole and excite acoustic signals, and the trigger switch is used to generate electric signal, synchronized electricity according to the acoustic signals
Cable is input to signal sampler, and signal sampler starts to acquire signal in electric signal excitation moment；The acoustic wave transducer is used for
The acoustic signals are received, and converts electric signal for the acoustic signals and exports to signal sampler.
Further, the acoustic receiver device further includes solid for the acoustic wave transducer of fixation balloon and acoustic wave transducer
Determine device.
Further, the fixed device of the acoustic wave transducer includes the shell that can accommodate acoustic wave transducer, spring cup, described
Shell is the cavity structure of upper end opening, lower openings, and acoustic wave transducer can be packed into the inner cavity of shell, and sound wave from upper opening
The bottom of energy converter is stretched out from lower openings directly to be contacted with drilling rock mass surface, and the upper shell is covered with spring cup, bullet
Spring is connected between spring base portion and acoustic wave transducer, the air bag is fixed on spring cup.
Further, the spring cup is equipped with wire guide, and the acoustic wave transducer cable connecting with acoustic wave transducer is from leading
String holes is pierced by be connect with the acoustic wave transducer of adjacent acoustic wave reception device.
Further, the spring cup two sides are equipped with air guide tube seat, and the both ends of air bag are connected with air bag tracheae, balloon ends
Air bag tracheae pass through the air guide tube seat on spring cup and secure the air-bag to the top of spring cup, air bag tracheae and adjacent sound wave
The air bag of reception device connects.
Further, the air charging system is located at first air bag that drilling is outer, and air charging system passes through gas tube and outer end
It connects, is inflated after being communicated between each air bag by air bag tracheae to air bag, by air bag expansion to the bullet of acoustic receiver device
Spring lid applies certain pressure, and then transmitting pressure by spring makes acoustic wave transducer and borehole wall rock mass intimate surface contact.
Further, the two sides of the shell are respectively equipped with a connecting rod nut connector, and scalable connecting rod passes through outer
Connecting rod nut connector on shell is connected, and each acoustic receiver device is composed in series the anhydrous coupled acoustic wave of air pressure series connection and is connect
Receiving apparatus.
The utility model does not need other fluid couplings such as water, is in close contact using acoustic wave transducer and the wall of a borehole rock mass,
In the outer rock mass surface excitation acoustic signals that drill, acoustic wave transducer, which is directly received, is propagated through the direct wave come through rock mass, utilizes
Direct wave first arrival time and acoustic wave transducer distance computation rock mass velocity, and relaxation zone thickness is determined according to velocity of wave variation tendency,
The device is the limitation for breaching traditional Wall Rock of Tunnel relaxation zone thickness test, is both solved in drilling under anhydrous condition
Rock mass velocity test, also solves with the Wall Rock of Tunnel relaxation zone thickness smaller than the velocity of wave of water of rock mass velocity in the case of water coincidence not
The problem that can be tested, really can efficiently measure Wall Rock of Tunnel relaxation zone thickness.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model Wall Rock of Tunnel velocity of wave and relaxation zone thickness testing device；
Fig. 2 is the structural schematic diagram of reception device in the utility model.
In figure: 1-air bag, 2-air bag tracheaes, 3-acoustic wave transducer cables, 4-spring cups, 5-springs, 6-can stretch
Contracting connecting rod, 7-acoustic wave transducers, 8-shells, 9-connecting rod nut connectors, 10-wire guides, 11-air charging systems, 12-
Signal sampler, 13-signal excitation devices, 14-acoustic receiver devices, 15-trigger switch, 16-synchronizing cables.
Specific embodiment
Below in conjunction with the attached drawing in the utility model, the technical solution in the utility model is carried out clearly and completely
Description.
Fig. 1 and Fig. 2 is please referred to, the utility model Wall Rock of Tunnel velocity of wave and relaxation zone thickness testing device include acoustic receiver
Device 14, air charging system 11, signal sampler 12, signal excitation device 13, scalable connecting rod 6.
The acoustic receiver device 14 has multiple, including the fixed device of acoustic wave transducer 7, acoustic wave transducer and volume
Expandable air bag 1, the acoustic wave transducer 7 are the moving coil pickoff or piezoelectric ceramic transducer of pressure resistance and leakproofness, institute
Stating the fixed device of acoustic wave transducer includes the shell 8 that can accommodate acoustic wave transducer 7, spring cup 4, and shell 8, spring cup 7 are common right
Acoustic wave transducer 7 is fixed.The shell 8 is the cavity structure of upper end opening, lower openings, and acoustic wave transducer 7 can be from upper
Portion's opening is packed into the inner cavity of shell 8, and the bottom of acoustic wave transducer 7 is stretched out from lower openings and directly connect with drilling rock mass surface
Touching.The two sides of the shell 8 are respectively equipped with a connecting rod nut connector 9, for connecting with scalable connecting rod 6.It is scalable
Connecting rod 6 is connected by the connecting rod nut connector 9 on shell 8, and each acoustic receiver device 14 is composed in series air pressure
It connects anhydrous coupled acoustic wave reception device, and is sent to nominative testing point in hole wall.
8 upper end cover of shell is equipped with spring cup 4, and spring cup 4 can be connect with 8 upper end of shell for threaded connection or screw,
Spring 5 is connected between 4 bottom of spring cup and acoustic wave transducer 7, spring cup 4 is equipped with wire guide 10, connects with acoustic wave transducer 7
The acoustic wave transducer cable 3 connect is pierced by from wire guide 10 and connect with the acoustic wave transducer 7 of adjacent acoustic wave reception device 14.The gas
Capsule 1 is fixed on spring cup 4, specifically, 5 two sides of spring cup are equipped with air guide tube seat, the air bag tracheae 2 at 1 both ends of air bag passes through spring
Air bag 1 is fixed on the top of spring cup 4 by the air guide tube seat on lid 5.That is the both ends of air bag 1 are connected with air bag tracheae 2, air bag gas
Pipe 2 is connect with the air bag 1 of adjacent acoustic receiver device 14.
Multiple acoustic receiver devices 14 are connected in series is set in borehole wall, and wherein outer end acoustic receiver device 14 passes through
Gas tube is connect with air charging system 11, and the air charging system 11 is located at that drilling is outer, and air charging system 11 passes through gas tube and outer end
First air bag 1 connects, and inflates after being communicated between each air bag 1 by air bag tracheae 2 to air bag 1, is expanded by air bag 1 to sound
The spring cup 4 of wave receiving device 14 applies certain pressure, and then transmitting pressure by spring 5 makes acoustic wave transducer 7 and drilling hole
Wall rock mass intimate surface contact, it can be ensured that acoustic wave transducer 7 couples well with hole wall.
The signal excitation device 13, for exciting acoustic signals in the outer palisades that tap of drilling；The signal excitation device
13 include hammering vibration source or similar sound wave exciter, described by signal excitation device 13 in rock mass surface excitation acoustic signals
Trigger switch 15 on signal excitation device 13 generates electric signal, and synchronized cable 16 is input to signal sampler 12, and signal is adopted
Collection instrument 12 starts to acquire signal in electric signal excitation moment.
The left side acoustic wave transducer cable 3 and signal sampler 12 of outer end acoustic receiver device 14 communicate to connect, right side sound
Wave transducer cable 3 is connect with the acoustic wave transducer 7 of adjacent acoustic wave reception device 14, and acoustic wave transducer 7 can receive acoustic signals,
And it is translated into electric signal and is exported by acoustic wave transducer cable 3 to signal sampler 12.The signal sampler 12 is used for
Electric signal storage that acoustic wave transducer 7 is transmitted and on the screen real-time display waveform, read each acoustic wave transducer 7 and receive
Direct wave arrival time, and time difference reached using acoustic wave transducer spacing and corresponding direct wave, calculate the Duan Yan
The value of wave speed of body, and then the depth velocity of wave curve of different depth section is drawn, relaxation zone thickness is divided according to plots changes.
The utility model provides a kind of Wall Rock of Tunnel velocity of wave and relaxation zone thickness testing method, it is characterised in that using above-mentioned
Device carries out, and described method includes following steps:
Step 1: assembling acoustic receiver device 14.Acoustic wave transducer 7 is put into 8 inner cavity of shell, the bottom of acoustic wave transducer 7
It is inserted into the bottom tip of shell 8,8 upper end fixed spring lid 5 of shell, fixed acoustic wave transducer 7,3 edge of acoustic wave transducer cable
The wire guide 10 of spring cup 5 is drawn, and the expandable air bag 1 of volume passes through the gas-guide tube on spring cup 5 using two air bag tracheaes 2
Slot is fixed on the top of casing cover, and multiple reception devices can be assembled according to need of work；
Step 2: the anhydrous coupled acoustic wave reception device of assembling air pressure tandem.Scalable 6 both ends of connecting rod are respectively aligned to phase
The connecting rod nut connector 9 of adjacent shell 8, rotation is tightened, and the air bag tracheae 2 of air bag 1 is connected, the air bag tracheae 2 of first air bag 1
It is connected with the air charging system 11 outside drilling, the outer end screw cap closures of the last one air bag 1 prevent and treat gas leakage.First shell 8
Outer end nut connector is connected with push-pull rod, and reception device is so connected into an entirety, forms air pressure series connection without water coincidence sound
Wave receiving device, and successively measure the distance between each acoustic wave transducer center；
Step 3: air pressure anhydrous coupled acoustic wave reception device of connecting being pushed to specified bore position with push-pull rod；
Step 4: the expandable air bag of volume 1 being inflated by air charging system 11, each air bag 1 expands, and makes sound wave transducing
Device 7 and borehole wall surfaces are in close contact；
Step 5: exciting acoustic signals, and synchronous generation electric signal, electricity using signal excitation device 13 at drilling orifice
Signal, which is input to signal sampler 12, makes it start to acquire data, and acoustic signals are vibrated by rock mass, the vibration letter of generation
Acoustic wave transducer 7 number is traveled to, and is incuded by acoustic wave transducer 7 and receives, vibration signal is converted telecommunications by acoustic wave transducer 7
Number, the signal sampler 12 outside drilling orifice, the telecommunications that acoustic wave transducer 7 is transmitted are transported to by acoustic wave transducer cable 3
Number storage and real-time display waveform on the screen, read the arrival time for the direct wave that each acoustic wave transducer 7 receives, and sharp
The time difference reached with acoustic wave transducer spacing and corresponding direct wave, the value of wave speed of this section of rock mass is calculated, that is, completes an examination
Test the wave velocity testing of section；
Step 6: the gas in release air bag 1, air bag 1 are shunk using self weight, then anhydrous with the mobile air pressure series connection of push-pull rod
Coupled acoustic wave reception device repeats step 4 and step 5, carries out the wave velocity testing of next test section to next depth；
Step 7: drawing the depth velocity of wave curve of different depth section, divide relaxation zone thickness according to plots changes.
The utility model breaches the limitation of traditional acoustic test relaxation zone, which solves in drilling without regimen
Under condition rock mass velocity test, also solve rock mass velocity it is smaller than the velocity of wave of water in the case where tunnel surrounding relaxation zone thickness survey
Examination, test result really can efficiently measure surrounding rock of chamber relaxation zone thickness and character.
The content that this specification is not described in detail belongs to the prior art well known to professional and technical personnel in the field.
The utility model Wall Rock of Tunnel velocity of wave and relaxation zone thickness testing device, comprising: air charging system, reception device, letter
Number excitation apparatus, scalable connecting rod and；Wall Rock of Tunnel velocity of wave and relaxation zone of the utility model air pressure tandem without water coincidence
Thickness testing method is directly in close contact by acoustic wave transducer and borehole wall rock mass to measure direct wave in rock mass
Velocity of wave is propagated, drilling depth and the variation tendency of velocity of wave is recycled to divide wall rock loosening ring thickness.The utility model is implemented to solve
The rock mass velocity test being unable in drilling in the case of water storage, at the same solve rock mass velocity it is than the velocity of wave of water smaller in the case where tunnel
The test of road wall rock loosening ring thickness, measurement country rock velocity of wave and relaxation zone thickness that can be authentic and valid.
Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to
It is any to belong to those skilled in the art within the technical scope disclosed by the utility model in this, the change that can be readily occurred in
Change or replace, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be with power
Subject to the protection scope that benefit requires.
Claims (7)
1. a kind of Wall Rock of Tunnel velocity of wave and relaxation zone thickness testing device, it is characterised in that: including acoustic receiver device (14), fill
Device of air (11), signal sampler (12), signal excitation device (13), scalable connecting rod (6), at least two acoustic receivers dress
It sets after (14) are concatenated by scalable connecting rod (6) and is set in borehole wall, the acoustic receiver device (14) includes that sound wave changes
Energy device (7), the expandable air bag of volume (1), each air bag (1) connect after being concatenated by air bag tracheae (2) with air charging system (11)
Logical, air charging system (11) is by inflating air bag (1), expanding air bag (1) and then making acoustic wave transducer (7) and borehole wall surfaces
It is in close contact；The signal excitation device (13) includes hammering vibration source and trigger switch (15), and the hammering vibration source is for boring
Palisades are tapped outside hole and excite acoustic signals, and the trigger switch (15) is used to generate electric signal according to the acoustic signals, through same
Step cable (16) is input to signal sampler (12), and signal sampler (12) starts to acquire signal in electric signal excitation moment；Institute
Acoustic wave transducer (7) are stated for receiving the acoustic signals, and by the acoustic signals converts electric signal and exports and adopted to signal
Collect instrument (12).
2. Wall Rock of Tunnel velocity of wave as described in claim 1 and relaxation zone thickness testing device, it is characterised in that: the sound wave connects
Receiving apparatus (14) further includes for the fixed device of the acoustic wave transducer of fixation balloon (1) and acoustic wave transducer (7).
3. Wall Rock of Tunnel velocity of wave as claimed in claim 2 and relaxation zone thickness testing device, it is characterised in that: the sound wave changes
Can the fixed device of device include shell (8), the spring cup (4) that can accommodate acoustic wave transducer (7), the shell (8) be upper end opening,
The cavity structure of lower openings, acoustic wave transducer (7) can be packed into the inner cavity of shell (8), and acoustic wave transducer (7) from upper opening
Bottom stretch out from lower openings and directly contacted with the rock mass surface that drills, shell (8) upper end cover is equipped with spring cup (4), bullet
It is connected between spring lid (4) bottom and acoustic wave transducer (7) spring (5), the air bag (1) is fixed on spring cup (4).
4. Wall Rock of Tunnel velocity of wave as claimed in claim 3 and relaxation zone thickness testing device, it is characterised in that: the spring cup
(4) wire guide (10) are equipped with, the acoustic wave transducer cable (3) connect with acoustic wave transducer (7) be pierced by from wire guide (10) and
The acoustic wave transducer (7) of adjacent acoustic wave reception device (14) connects.
5. Wall Rock of Tunnel velocity of wave as claimed in claim 3 and relaxation zone thickness testing device, it is characterised in that: the spring cup
(5) two sides are equipped with air guide tube seat, and the both ends of air bag (1) are connected with air bag tracheae (2), and the air bag tracheae (2) at air bag (1) both ends is worn
Air bag (1) is fixed on the top of spring cup (4), air bag tracheae (2) and adjacent sound wave by the air guide tube seat crossed on spring cup (5)
The air bag (1) of reception device (14) connects.
6. Wall Rock of Tunnel velocity of wave as claimed in claim 3 and relaxation zone thickness testing device, it is characterised in that: the inflation dress
It sets (11) to be located at outside drilling, air charging system (11) is connected by first air bag (1) of gas tube and outer end, each air bag (1)
Between communicated by air bag tracheae (2) after inflated to air bag (1), by air bag (1) expansion to the bullets of acoustic receiver device (14)
Spring lid (4) applies certain pressure, and then transmitting pressure by spring (5) makes acoustic wave transducer (7) and borehole wall rock mass surface
It is in close contact.
7. Wall Rock of Tunnel velocity of wave as claimed in claim 3 and relaxation zone thickness testing device, it is characterised in that: the shell
(8) two sides are respectively equipped with a connecting rod nut connector (9), and scalable connecting rod (6) passes through the connecting rod spiral shell on shell (8)
Female connector (9) is connected, and each acoustic receiver device (14) is composed in series the anhydrous coupled acoustic wave reception device of air pressure series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920295361.1U CN209446157U (en) | 2019-03-08 | 2019-03-08 | Wall Rock of Tunnel velocity of wave and relaxation zone thickness testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920295361.1U CN209446157U (en) | 2019-03-08 | 2019-03-08 | Wall Rock of Tunnel velocity of wave and relaxation zone thickness testing device |
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| Publication Number | Publication Date |
|---|---|
| CN209446157U true CN209446157U (en) | 2019-09-27 |
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ID=68033718
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920295361.1U Active CN209446157U (en) | 2019-03-08 | 2019-03-08 | Wall Rock of Tunnel velocity of wave and relaxation zone thickness testing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113138232A (en) * | 2021-04-23 | 2021-07-20 | 中南大学 | System and method for testing loosening ring of weak surrounding rock |
-
2019
- 2019-03-08 CN CN201920295361.1U patent/CN209446157U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113138232A (en) * | 2021-04-23 | 2021-07-20 | 中南大学 | System and method for testing loosening ring of weak surrounding rock |
| CN113138232B (en) * | 2021-04-23 | 2022-06-24 | 中南大学 | System and method for testing loosening ring of weak surrounding rock |
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