CN116399247B - Large-range laser displacement measuring instrument suitable for surrounding rock large deformation - Google Patents
Large-range laser displacement measuring instrument suitable for surrounding rock large deformation Download PDFInfo
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- CN116399247B CN116399247B CN202310105833.3A CN202310105833A CN116399247B CN 116399247 B CN116399247 B CN 116399247B CN 202310105833 A CN202310105833 A CN 202310105833A CN 116399247 B CN116399247 B CN 116399247B
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- hole
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- 239000011435 rock Substances 0.000 title claims abstract description 68
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 30
- 238000005553 drilling Methods 0.000 claims abstract description 39
- 210000000078 claw Anatomy 0.000 claims abstract description 24
- 239000012634 fragment Substances 0.000 claims description 6
- 239000003566 sealing material Substances 0.000 claims description 6
- -1 polytetrafluoroethylene Polymers 0.000 claims description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 abstract description 8
- 230000000149 penetrating effect Effects 0.000 abstract description 6
- 210000001503 joint Anatomy 0.000 abstract description 2
- 238000011900 installation process Methods 0.000 description 6
- 239000010963 304 stainless steel Substances 0.000 description 5
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a large-range laser displacement measuring instrument suitable for surrounding rock large deformation, which comprises an outer sleeve arranged in a rock drilling hole, wherein the end surface of the outer sleeve, which is close to the inside of the drilling hole, is connected with a fixing piece, and the end surface of the fixing piece, which is close to the inside of an outer sleeve barrel, is connected with a pull rod extending towards the outside of the drilling hole; the end, close to the fixing piece, of the pull rod is sleeved with a guide pillar in a penetrating mode, the guide pillar is in butt joint with the inner wall of the outer sleeve and the pull rod, and the end, close to the outer end of the drilling hole, of the pull rod is sleeved with a ranging baffle plate which is perpendicular to the pull rod in a penetrating mode; the guide pillar is towards the terminal surface butt of drilling outside has the inner skleeve, range finding baffle is arranged in the inner skleeve, range finding baffle is provided with laser sensor towards the outside interval of drilling, just laser sensor arranges in the inner skleeve. The invention not only can realize the maximum measuring range of 1m and is suitable for real-time monitoring of the surrounding rock terrain large deformation, but also can integrally fix the measuring instrument in the drill hole through the special structure of the non-return claw.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering, in particular to a wide-range laser displacement measuring instrument suitable for surrounding rock large deformation.
Background
In the whole life cycle of underground engineering construction and operation, the safety state of surrounding rock needs to be monitored and evaluated in real time, wherein the deformation of the surrounding rock is a key index for evaluating the safety and stability of the surrounding rock. Particularly, when an underground tunnel (or a cavity) is excavated in a stratum with large deformation of surrounding rock, the surrounding rock is often damaged by large deformation, and at this time, the real-time monitoring of the deformation of the surrounding rock is particularly important.
At present, common surrounding rock deformation monitoring means mainly comprise surrounding rock surface convergence monitoring and surrounding rock internal displacement monitoring. Among them, the displacement measuring instruments installed inside the surrounding rock are generally required to be used throughout the life cycle of the structure, and therefore, these instruments must have good durability, strong corrosion resistance, and easy installation and simple operation.
In the prior art, a vibrating wire type multipoint displacement meter is generally adopted to measure the internal deformation of surrounding rock of an underground tunnel (or a cavity), the multipoint displacement meter is firstly placed into a drill hole during installation, and then concrete is poured into the drill hole to fix the multipoint displacement meter in the drill hole, so that the purpose of measuring the deformation of the surrounding rock for a long time is achieved.
The multipoint displacement meter has higher measurement accuracy, but has the following disadvantages: firstly, the maximum range is smaller, generally not more than 30cm, and cannot be suitable for meter-level deformation in tunnel (or cavity) engineering; secondly, the multipoint displacement meter needs to be fixed by grouting in a drilling hole in the installation process, and the installation process is complicated.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the large-range laser displacement measuring instrument suitable for surrounding rock large deformation, the maximum range of the large-range laser displacement measuring instrument can reach 1m, the large-range laser displacement measuring instrument is suitable for real-time monitoring of surrounding rock topography large deformation, meanwhile, the installation process is simple, the measuring instrument is not required to be fixed in a drilling hole in a grouting mode, and the labor intensity of staff is reduced.
In order to achieve the above purpose, the invention provides a wide-range laser displacement measuring instrument suitable for surrounding rock large deformation, which comprises an outer sleeve arranged in a rock drilling hole, and is characterized in that: the end face, close to the inside of the drill hole, of the outer sleeve is connected with a fixing piece, and the end face, close to the inside of the outer sleeve, of the fixing piece is connected with a pull rod extending towards the outside of the drill hole;
The end, close to the fixing piece, of the pull rod is sleeved with a guide pillar in a penetrating mode, the guide pillar is in butt joint with the inner wall of the outer sleeve and the pull rod, and the end, close to the outer end of the drilling hole, of the pull rod is sleeved with a ranging baffle plate which is perpendicular to the pull rod in a penetrating mode;
The end face, facing the outside of the drilling hole, of the guide pillar is abutted with an inner sleeve, the inner sleeve is attached to the inner wall of the outer sleeve, extends out of the outer sleeve and can freely move towards the outside of the drilling hole, the ranging baffle is arranged in the inner sleeve barrel, laser sensors are arranged at intervals towards the outer side of the drilling hole, and the laser sensors are arranged in the inner sleeve barrel;
the fixed part periphery the inner skleeve extends outer sleeve periphery and is overlapped respectively and is equipped with the non-return claw, the non-return claw is including being a plurality of shell fragment that the circumference was arranged, every the shell fragment all diverges towards the drilling outside and extends, and the diameter of diverging that the shell fragment that the circumference was arranged constitutes is greater than the drilling diameter.
Further, the inner sleeve is provided with a cylinder cover close to the outer end face of the drill hole, the cylinder cover is connected with the inner sleeve through threads, and the non-return claw on the inner sleeve is arranged on the periphery of the cylinder cover.
Further, a wire guide hole for passing through the laser sensor wire is cut on the cylinder wall of the cylinder cover.
Further, the periphery of the laser sensor wire is wrapped with a sealing material, and the sealing material is made of polytetrafluoroethylene.
Still further, the non-return claw is including wrapping up in the barrel periphery, and be symmetrical arrangement's C type clamp, the shell fragment is evenly fixed around C type clamp, every C type clamp tip all extends radially has the connection piece, every all open on the connection piece has the connecting hole, through the bolted connection in the connecting hole between the C type clamp of symmetrical arrangement.
Further, the guide posts are provided with pull rod supporting covers at intervals towards the inner sides of the drill holes, and the pull rod supporting covers are in threaded connection with the inner walls of the outer sleeves.
Further, the fixing piece is in threaded connection with the inner wall of the outer sleeve, and the periphery of the fixing piece is flush with the periphery of the outer sleeve.
Further, the distance measuring baffle plate is movably connected with the pull rod through a shaft clamp.
Further, the diameter of the outer sleeve is 50-75 mm, the length is 1.0-1.4 m, and the wall thickness is 4-7 mm.
Further, the measuring range of the laser sensor is 0-2 m, and the measuring error is +/-1 mm.
The invention has the advantages that:
1. According to the deformation type and the maximum deformation depth of the rock mass, the initial state of the inner sleeve in the measuring instrument and the whole length of the measuring instrument can be set, and if the rock mass is mainly deformed by stretching, the inner sleeve in the initial state is suitable to be completely plugged into the outer sleeve; otherwise, if the rock mass is mainly deformed by compression, the suitable part of the inner sleeve in the initial state extends out of the outer sleeve;
2. According to the invention, the outer sleeve is used as the fixed end of the measuring instrument, the inner sleeve is used as the movable end of the measuring instrument, the fixed end and the movable end are respectively provided with the non-return claw, the measuring instrument is integrally plugged into the drill hole during installation, and at the moment, the non-return claw is constrained by the inner wall of the drill hole, and the circumferentially arranged elastic sheets are compressed and tightly attached to the inner wall of the drill hole, so that the equipment can only be pushed in along the inner direction of the drill hole and can not be pulled out of the drill hole;
3. When the measuring instrument is pushed to a set depth, the measuring instrument is pulled to the outside of the drilling hole, and as the elastic sheet on the non-return claw is designed to diverge towards the outside of the drilling hole, the elastic sheet can be clamped into the inner wall of the drilling hole more firmly under the action of the pulling force, so that the fixed end and the movable end of the measuring instrument are fixed in the drilling hole, the outer sleeve and the deep surrounding rock of the measuring instrument are ensured to deform synchronously, the inner sleeve and the shallow surrounding rock of the measuring instrument deform synchronously, and the complex process of pouring concrete to fix a rod body can be avoided;
4. when the shallow rock mass is deformed, the inner sleeve in the measuring instrument correspondingly and cooperatively deforms along with surrounding rock, the laser sensor correspondingly and cooperatively deforms along with the surrounding rock, the distance between the laser sensor and the ranging baffle is changed in real time, the laser pulse reflection time of the laser sensor transmitted to the ranging baffle is also changed in real time, and the changed laser pulse reflection time is converted into the distance between the laser sensor and the ranging baffle, so that the deformation value of the shallow rock mass is obtained;
5. When the deep rock mass is deformed, the outer sleeve in the measuring instrument correspondingly and cooperatively deforms along with surrounding rock, the distance between the distance measuring baffle and the laser sensor also correspondingly and cooperatively deforms along with surrounding rock, the laser pulse reflection time of the laser sensor transmitted to the distance measuring baffle also changes in real time, and the deformed value of the deep rock mass is obtained by converting the changed laser pulse reflection time into the distance between the laser sensor and the distance measuring baffle;
The large-range laser displacement measuring instrument suitable for the large deformation of the surrounding rock can realize the maximum range of 1m, is suitable for the real-time monitoring of the large deformation of the surrounding rock terrain, can be integrally fixed in a drill hole through the special structure of the non-return claw, avoids the complicated grouting fixation in the drill hole, has simple installation process and reduces the labor intensity of workers.
Drawings
FIG. 1 is a schematic perspective view of a wide range laser displacement measuring instrument adapted to large deformation of surrounding rock according to the present invention;
FIG. 2 is a schematic diagram of the front view of the wide range laser displacement measuring instrument adapted to the large deformation of surrounding rock according to the present invention;
FIG. 3 is a schematic cross-sectional view of the structure of FIG. 2 in the direction A-A;
FIG. 4 is an enlarged view of a cross-sectional structure of the pull rod supporting cover of FIG. 3;
FIG. 5 is a right (or left) view of the pull rod support cover of FIG. 3;
FIG. 6 is an enlarged cross-sectional view of the guide post of FIG. 3;
FIG. 7 is a schematic elevational view of the guide post of FIG. 3;
FIG. 8 is a right (or left) view of the guide post of FIG. 3;
FIG. 9 is an enlarged schematic view of the structure shown at B in FIG. 3;
FIG. 10 is a right (or left) view of the reverse pawl of FIG. 1;
FIG. 11 is a schematic diagram of a laser sensor;
in the figure: the device comprises an outer sleeve 1, a fixing piece 2, a pull rod 3, a pull rod supporting cover 4, a guide post 5, a distance measuring baffle 6, an inner sleeve 7, a laser sensor 8, a non-return claw 9 and a shaft clamp 10;
the inner sleeve 7 comprises: a cylinder cover 7-1 and a wire guide 7-2;
The non-return pawl 9 includes: the elastic sheet 9-1, the C-shaped clamp 9-2, the connecting sheet 9-3 and the connecting hole 9-4.
Detailed Description
The invention is described in further detail below with reference to the drawings and specific examples.
In the description of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the invention.
As shown in fig. 1 to 10, the invention is suitable for the large-range laser displacement measuring instrument of surrounding rock large deformation, comprising an outer sleeve 1 arranged in a rock drilling hole, wherein the end surface of the outer sleeve 1, which is close to the inside of the drilling hole, is connected with a fixing piece 2, and the end surface of the fixing piece 2, which is close to the inside of the outer sleeve 1, is connected with a pull rod 3 which extends towards the outside of the drilling hole;
the end, close to the fixing piece 2, of the pull rod 3 is sleeved with a guide post 5 in a penetrating mode, the guide post 5 is abutted to the inner wall of the outer sleeve 1 and the pull rod 3, and the end, close to the outer part of the drilling hole, of the pull rod 3 is sleeved with a ranging baffle 6 which is perpendicular to the pull rod 3 in a penetrating mode;
The end face, facing the outside of the drilling hole, of the guide post 5 is abutted with an inner sleeve 7, the inner sleeve 7 is attached to the inner wall of the outer sleeve 1, extends out of the outer sleeve 1 and can freely move towards the outside of the drilling hole, the ranging baffle 6 is arranged in the inner sleeve 7 barrel, laser sensors 8 are arranged at intervals towards the outer side of the drilling hole of the ranging baffle 6, and the laser sensors 8 are arranged in the inner sleeve 7 barrel;
the outer periphery of the fixing piece 2 and the outer periphery of the inner sleeve 6 extending out of the outer sleeve 1 are respectively sleeved with a non-return claw 9, the non-return claw 9 comprises a plurality of elastic pieces 9-1 which are circumferentially arranged, each elastic piece 9-1 diverges and extends towards the outside of a drilling hole, and the divergence diameter formed by the circumferentially arranged elastic pieces 9-1 is larger than the diameter of the drilling hole.
According to the invention, the initial state of the inner sleeve 7 in the measuring instrument and the whole length of the measuring instrument can be set according to the deformation type and the maximum deformation depth of the rock mass, and if the rock mass is mainly deformed by stretching, the inner sleeve 7 in the initial state is suitable to be completely plugged into the outer sleeve 1; on the contrary, if the rock mass is mainly deformed by compression, the inner sleeve 7 in the initial state is suitably partially extended out of the outer sleeve 1.
The working principle of the wide-range laser displacement measuring instrument is as follows:
Firstly, taking an outer sleeve 1 as a fixed end of a measuring instrument, taking an inner sleeve 7 as a movable end of the measuring instrument, respectively arranging a non-return claw 9 at the fixed end and the movable end, pushing the measuring instrument to a set depth in a drilling hole through a special structure of the non-return claw 9, and fixing the fixed end and the movable end in the drilling hole to ensure that the outer sleeve 1 of the measuring instrument and deep surrounding rock deform synchronously and the inner sleeve 7 of the measuring instrument and shallow surrounding rock deform synchronously;
Secondly, when the shallow rock mass is deformed, the inner sleeve 7 in the measuring instrument correspondingly coordinates deformation along with surrounding rock, the laser sensor 8 correspondingly coordinates deformation along with the surrounding rock, at the moment, the distance between the laser sensor 8 and the ranging baffle 6 changes in real time, the laser pulse reflection time emitted by the laser sensor 8 to the ranging baffle 6 also changes in real time, and the changed laser pulse reflection time is converted into the distance between the laser sensor 8 and the ranging baffle 6, so that the deformation value of the shallow rock mass is obtained;
Thirdly, when the deep rock mass is deformed, the outer sleeve 1 in the measuring instrument correspondingly coordinates deformation along with surrounding rock, meanwhile, the distance measuring baffle 6 correspondingly coordinates deformation along with surrounding rock, at the moment, the distance between the distance measuring baffle 6 and the laser sensor 8 changes in real time, the laser pulse reflection time emitted by the laser sensor 8 to the distance measuring baffle 6 also changes in real time, and the changed laser pulse reflection time is converted into the distance between the distance measuring baffle 6 and the laser sensor 8, so that the deformation value of the deep rock mass is obtained.
As shown in fig. 11, a schematic diagram of the laser sensor is shown. As can be seen from fig. 11, the laser sensor emits laser light from the emitting end, and the laser light is reflected to the laser reflection receiving module after encountering the ranging baffle. The distance between two points is calculated by a laser echo method, if the light propagates in air at the speed c, and the time required for one round trip between the laser sensor and the ranging baffle is t, the distance D between the laser sensor and the ranging baffle can be expressed as follows:
D＝(c*t)/2
In the method, in the process of the invention,
D is the distance between the ranging baffle and the laser sensor,
C-the speed at which light propagates in the atmosphere,
T-the time required for the laser sensor to travel back and forth with the ranging plate once.
Specifically, the inner sleeve 7 is provided with a cylinder cover 7-1 near the outer end surface of the drill hole, the cylinder cover 7-1 is connected with the inner sleeve 7 through threads, and a non-return claw 9 on the inner sleeve 7 is arranged on the periphery of the cylinder cover 7-1. The cylinder cover 7-1 is provided with a wire guide 7-2 cut on the cylinder wall for passing through the wire of the laser sensor 8.
Preferably, the periphery of the wire of the laser sensor 8 is wrapped with a sealing material, the sealing material is made of polytetrafluoroethylene, the physical heat resistance of the polytetrafluoroethylene can reach 280 ℃, the cold resistance can reach-100 ℃, and the storage life can reach 20 years. The wire of the polytetrafluoroethylene-coated laser sensor 8 can be used in a rock mass for a long period.
Specifically, the non-return claw 9 is including wrapping up at the barrel periphery, and be symmetrical arrangement's C type clamp 9-2, shell fragment 9-1 evenly fixes around C type clamp 9-2, every C type clamp tip all extends towards radial connecting piece 9-3, every connecting piece 9-3 is last to all to open has connecting hole 9-4, through the bolted connection in the connecting hole 9-4 between the C type clamp 9-2 of symmetrical arrangement.
Preferably, the guide posts 5 are provided with pull rod supporting covers 4 at intervals towards the inner side of the drilling hole, and the pull rod supporting covers 4 are in threaded connection with the inner wall of the outer sleeve 1. The guide post 5 and the pull rod supporting cover 4 are not only used for supporting the pull rod 3, but also can enable the pull rod 3 to cooperatively deform along with the outer sleeve 1, and further drive the ranging baffle 6 to deform, so that the distance from the laser sensor 8 to the ranging baffle 6 changes, and the purpose of measuring large deformation is achieved.
Specifically, mounting 2 and outer sleeve 1 inner wall threaded connection, and mounting 2 periphery and outer sleeve 1 periphery flush, easy to assemble.
The ranging baffle 6 is movably connected with the pull rod 3 through the shaft clamp 10, and the shaft clamp 10 has the main effects of fixing the ranging baffle 6 on the pull rod 3 and facilitating disassembly.
Preferably, the diameter of the outer sleeve 1 is 50-75 mm, the length is 1.0-1.4 m, and the wall thickness is 4-7 mm. In this example the outer sleeve 1 has a diameter of 65mm, a length of 1.2m and a wall thickness of 5mm.
The range of the laser sensor 8 is 0-2 m, and the measurement error is + -1 mm.
Preferably, the outer sleeve 1, the pull rod 3, the inner sleeve 7 and the non-return claw 9 are all made of 304 stainless steel. The 304 stainless steel is a universal stainless steel material, has stronger antirust performance than 200 series stainless steel materials, and has better high temperature resistance, and the limit of the using temperature is generally less than 650 ℃. In addition, the 304 stainless steel has excellent stainless corrosion resistance and better intergranular corrosion resistance, and experiments prove that: the 304 stainless steel has strong corrosion resistance in nitric acid with the concentration less than or equal to 65 percent and the boiling temperature below. The 304 stainless steel also has good corrosion resistance to alkaline solutions and most organic and inorganic acids.
The installation process of the wide-range laser displacement measuring instrument is as follows:
Firstly, the whole measuring instrument is plugged into a drill hole during installation, and at the moment, the non-return claw is constrained by the inner wall of the drill hole, and the circumferentially arranged elastic sheets are compressed and tightly attached to the inner wall of the drill hole, so that the measuring instrument can only be pushed in along the inner direction of the drill hole and cannot be pulled out of the drill hole;
And secondly, when the measuring instrument is pushed to a set depth, the measuring instrument is pulled to the outside of the drilling hole, and because the elastic sheet on the non-return claw is designed to diverge towards the outside of the drilling hole, the elastic sheet can be clamped into the inner wall of the drilling hole more firmly under the action of the pulling force, so that the fixed end and the movable end of the measuring instrument are fixed in the drilling hole, the outer sleeve and the deep surrounding rock of the measuring instrument are ensured to deform synchronously, the inner sleeve and the shallow surrounding rock of the measuring instrument deform synchronously, and the complex process of using a concrete pouring fixed rod body can be avoided.
The large-range laser displacement measuring instrument suitable for the large deformation of the surrounding rock can realize the maximum range of 1m, is suitable for the real-time monitoring of the large deformation of the surrounding rock terrain, can be integrally fixed in a drill hole through the special structure of the non-return claw, avoids the complicated grouting fixation in the drill hole, has simple installation process and reduces the labor intensity of workers.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a wide-range laser displacement measuring apparatu that is adapted to country rock large deformation, includes outer sleeve (1) of placing in the rock drilling, its characterized in that: the end face, close to the inside of the drill hole, of the outer sleeve (1) is connected with a fixing piece (2), and the end face, close to the inside of the drill hole, of the fixing piece (2) is connected with a pull rod (3) which is arranged in the inside of the outer sleeve (1) and extends towards the outside of the drill hole;
The end, close to the fixing piece (2), of the pull rod (3) is sleeved with a guide post (5), the guide post (5) is respectively abutted against the inner wall of the outer sleeve (1) and the periphery of the pull rod (3), and the end, close to the outer end of the drill hole, of the pull rod (3) is sleeved with a ranging baffle (6) which is perpendicular to the pull rod (3);
the end face, facing the outside of the drilling hole, of the guide post (5) is abutted with an inner sleeve (7), the inner sleeve (7) is attached to the inner wall of the outer sleeve (1), extends out of the outer sleeve (1) and can move freely towards the outside of the drilling hole, the ranging baffle (6) is arranged in the inner sleeve (7) cylinder, laser sensors (8) are arranged at intervals on the ranging baffle (6) towards the outside of the drilling hole, and the laser sensors (8) are fixed in the inner sleeve (7) cylinder;
The outer periphery of the fixing piece (2) and the outer periphery of the inner sleeve (6) extending out of the outer sleeve (1) are respectively sleeved with a non-return claw (9), the non-return claw (9) comprises a plurality of elastic pieces (9-1) which are circumferentially arranged, each elastic piece (9-1) diverges and extends towards the outside of a drilled hole, and the divergence diameter formed by the circumferentially arranged elastic pieces (9-1) is larger than the diameter of the drilled hole;
A cylinder cover (7-1) is arranged on the inner sleeve (7) close to the outer end surface of the drill hole, the cylinder cover (7-1) is connected with the inner sleeve (7) through threads, and a non-return claw (9) on the inner sleeve (7) is arranged on the periphery of the cylinder cover (7-1);
the guide posts (5) are provided with pull rod supporting covers (4) at intervals towards the inner sides of the drill holes, and the pull rod supporting covers (4) are in threaded connection with the inner walls of the outer sleeves (1).
2. The wide-range laser displacement measuring instrument adapted to large deformation of surrounding rock according to claim 1, wherein: a wire guide hole (7-2) for passing through a wire of the laser sensor (8) is cut on the cylinder wall of the cylinder cover (7-1).
3. The wide-range laser displacement measuring instrument adapted to large deformation of surrounding rock according to claim 2, wherein: the periphery of the wire of the laser sensor (8) is wrapped with a sealing material, and the sealing material is made of polytetrafluoroethylene.
4. A wide-range laser displacement measuring instrument adapted for large deformation of surrounding rock according to claim 3, wherein: the non-return claw (9) is including wrapping up in barrel periphery, and be C type clamp (9-2) of symmetrical arrangement, shell fragment (9-1) evenly fixes around C type clamp (9-2), every C type clamp tip all extends towards radial connection piece (9-3), every connecting piece (9-3) are last all to be cut out have connecting hole (9-4), connect through the bolt in connecting hole (9-4) between the C type clamp (9-2) of symmetrical arrangement.
5. The wide-range laser displacement measuring instrument adapted to large deformation of surrounding rock according to claim 1, wherein: the fixing piece (2) is in threaded connection with the inner wall of the outer sleeve (1), and the periphery of the fixing piece (2) is flush with the periphery of the outer sleeve (1).
6. The wide-range laser displacement measuring instrument adapted to large deformation of surrounding rock according to claim 1, wherein: the ranging baffle (6) is movably connected with the pull rod (3) through a shaft clamp (10).
7. The wide-range laser displacement measuring instrument adapted to large deformation of surrounding rock according to claim 1, wherein: the diameter of the outer sleeve (1) is 50-75 mm, the length is 1.0-1.4 m, and the wall thickness is 4-7 mm.
8. The wide-range laser displacement measuring instrument adapted to large deformation of surrounding rock according to claim 7, wherein: the measuring range of the laser sensor (8) is 0-2 m, and the measuring error is +/-1 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310105833.3A CN116399247B (en) | 2023-02-13 | 2023-02-13 | Large-range laser displacement measuring instrument suitable for surrounding rock large deformation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310105833.3A CN116399247B (en) | 2023-02-13 | 2023-02-13 | Large-range laser displacement measuring instrument suitable for surrounding rock large deformation |
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| CN116399247A CN116399247A (en) | 2023-07-07 |
| CN116399247B true CN116399247B (en) | 2024-05-10 |
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| US4461171A (en) * | 1983-01-13 | 1984-07-24 | Wisconsin Alumni Research Foundation | Method and apparatus for determining the in situ deformability of rock masses |
| CN103591880A (en) * | 2013-12-02 | 2014-02-19 | 中国石油集团工程设计有限责任公司 | Monitoring instrument and method for deformation of tunnel surrounding rocks |
| CN106595508A (en) * | 2016-12-27 | 2017-04-26 | 山东大学 | Measuring device and measuring method for surrounding rock deformation of geotechnical model test |
| CN208488070U (en) * | 2018-08-24 | 2019-02-12 | 中交第一公路工程局有限公司 | A kind of telescopic tunnel surrounding rock displacement monitoring reflection sheet protection device |
| CN109540018A (en) * | 2018-12-13 | 2019-03-29 | 武汉大学 | A kind of shield machine shield region country rock convergent deformation real-time monitoring device |
| CN110030939A (en) * | 2019-04-04 | 2019-07-19 | 中铁十四局集团有限公司 | A kind of country rock linear displacement measuring device and method |
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