CN114114388B - Microseism monitoring sensor and cable protection device for tunnel drilling and blasting method construction - Google Patents
Microseism monitoring sensor and cable protection device for tunnel drilling and blasting method construction Download PDFInfo
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- CN114114388B CN114114388B CN202111427053.8A CN202111427053A CN114114388B CN 114114388 B CN114114388 B CN 114114388B CN 202111427053 A CN202111427053 A CN 202111427053A CN 114114388 B CN114114388 B CN 114114388B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 23
- 238000005422 blasting Methods 0.000 title claims abstract description 18
- 238000010276 construction Methods 0.000 title claims abstract description 16
- 238000005553 drilling Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims description 6
- 238000009434 installation Methods 0.000 claims abstract description 19
- 230000006835 compression Effects 0.000 claims description 35
- 238000007906 compression Methods 0.000 claims description 35
- 239000004020 conductor Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims description 2
- 239000004575 stone Substances 0.000 abstract description 10
- 230000000694 effects Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/18—Receiving elements, e.g. seismometer, geophone or torque detectors, for localised single point measurements
- G01V1/181—Geophones
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/20—Arrangements of receiving elements, e.g. geophone pattern
- G01V1/201—Constructional details of seismic cables, e.g. streamers
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- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Acoustics & Sound (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention relates to a microseism monitoring sensor and a cable protection device for tunnel drilling and blasting construction, which comprise a shell, a sensor mounting module, a cable mounting module and a sensor, wherein the sensor is arranged on the shell; the sensor is located in the shell and fixed through the sensor installation module, the cable installation module is provided with a superelastic rubber strip, and the part of the cable of the sensor in the shell is fixed with the superelastic rubber strip and spirally wound on the superelastic rubber strip. The invention can effectively prevent the sensor from being damaged by flying stones, and the cable can stretch along with the superelastic rubber strip, so that the cable can be protected from being broken, thereby ensuring the normal operation of the sensor.
Description
Technical Field
The invention belongs to the technical field of tunnel construction, and relates to a device for protecting a microseism monitoring sensor and a cable line arranged in a tunnel when the tunnel construction is carried out by adopting a drilling and blasting method.
Background
When the tunnel is constructed by adopting a drilling and blasting method, a microseismic sensor is usually arranged on a rock mass in the tunnel to monitor vibration data of the rock mass of the tunnel so as to ensure engineering safety. The sensor is usually surface-mounted, and in order to monitor more accurately, the sensor is often arranged closer to the blasting position, but flying stones generated by blasting can easily strike the sensor, so that the sensor is directly crushed; or flying stones drop on the cable wires of the sensor to smash or stretch the cable wires, so that the sensor cannot be used. In practical construction, the above situation often occurs, not only increases material loss, but also seriously affects monitoring quality and continuity of monitoring data.
Disclosure of Invention
The invention aims to solve the problems and provides a microseism monitoring sensor and a cable protection device for tunnel drilling and blasting construction, which can ensure that the sensor and the cable are not damaged.
The technical scheme of the invention is as follows:
a microseism monitoring sensor and cable conductor protection device for tunnel drilling and blasting method construction, its characterized in that: the sensor comprises a shell, a sensor mounting module, a cable mounting module and a sensor;
the shell is rectangular in shape and comprises a rectangular top plate, the four sides of the top plate are respectively welded with a side plate, and the bottom of the shell is open; a fixing hole is respectively arranged on the top plate and close to the four corners, one end of the top plate is provided with a mounting hole, the mounting hole is a cylinder body extending to a certain length in the shell, the inner wall of the mounting hole is provided with internal threads, and the inner side of the bottom of the mounting hole is provided with an annular limiting plate which is coaxial with the mounting hole; a first fixed block is arranged on the inner wall of the other end of the top plate, a second fixed block is arranged between the first fixed block and the mounting hole, a first T-shaped jack is arranged on one side of the first fixed block, which faces the end part of the top plate, the front end of the first T-shaped jack penetrates through the other side of the first fixed block, a second T-shaped jack is arranged on one side of the second fixed block, which faces the mounting hole, the front end of the second T-shaped jack penetrates through the other side of the second fixed block, one end of the first fixed block and one end of the second fixed block are fixedly connected with the bottom surface of the top plate, and a strip-shaped opening communicated with the T-shaped jack is formed in the other end of the first fixed block and the second fixed block;
the sensor mounting module comprises a spring ring, a mounting block, a mounting core and a compression cover; the diameter of the spring ring is larger than the inner diameter of the annular limiting plate and smaller than or equal to the inner diameter of the mounting hole; the mounting block comprises a cylindrical positioning block with the diameter equal to the inner diameter of the annular limiting plate, one end of the positioning block is provided with a cylindrical compression block with the diameter equal to the diameter of the mounting hole, one side of the positioning block is provided with a positioning groove, and the front end of the positioning groove is provided with a through hole penetrating to the other side of the positioning block; the mounting core is a block body with a shape matched with the positioning groove on the positioning block, the front end of the mounting core is connected with a bolt, and the rear end of the bolt is fixed in the mounting core; the compression cover is a cylinder with the diameter equal to that of the mounting hole or a cylinder with one end sealed, and the outer wall of the compression cover is provided with external threads;
the cable installation module comprises two T-shaped blocks, and a superelastic rubber strip is fixedly connected between the ends of the two T-shaped blocks;
the rear end of the sensor is longitudinally provided with a screw hole along the sensor, and the front end of the sensor is connected with a cable;
the spring ring is positioned in a mounting hole on the top plate, the lower end of the spring ring is supported on the annular limiting plate, a positioning block of the mounting block penetrates through the annular limiting plate in the mounting hole to extend into the shell, a compression block of the mounting block is pressed at the upper end of the spring ring, and the compression cover is in threaded connection in the mounting hole and compresses the compression block; the mounting core is inserted into the positioning groove on the positioning block, a bolt at the front end of the mounting core penetrates through the through hole on the positioning block and is in threaded connection with the screw hole at the rear end of the sensor, a fixing nut is in threaded connection with the bolt, and the fixing nut is tightly propped against the outer wall of the positioning block; the cable of sensor front end passes second T type jack and is fixed with super elastic rubber strip one end ligature, then spiral winding certain length and with super elastic rubber strip other end ligature fixed on super elastic rubber strip, pass first T type jack on the first fixed block and wear out on the casing lateral wall at last in the first T type jack on the first fixed block respectively in the first T type jack on the first fixed block of cable installation module.
According to the invention, the sensor is arranged in the rigid protective shell, so that the sensor can be effectively prevented from being crushed by flying stones, and is suspended in the shell, and the sensor can be prevented from being damaged even if the shell is directly deformed by being hit by the flying stones; the part of the cable line positioned in the shell is spirally wound on the superelastic rubber strip, and the cable line has a certain stretching length, so that the cable line can be protected from being broken even if flying stones fall on the cable line positioned outside the shell, thereby ensuring the normal operation of the sensor. The sensor is firmly installed, so that the sensor is prevented from generating clutter due to shaking of the sensor, and the monitoring effect is not affected; the arrangement of the compression cover and the spring ring can adapt to the uneven installation position of the inner surface of the tunnel, can ensure that the installation block is contacted with the installation surface of the tunnel, can better enable the sensor to receive elastic waves, and ensures the vibration monitoring effect.
Drawings
FIG. 1 is a schematic plan view of a housing structure;
FIG. 2 is a schematic view in the direction A-A of FIG. 1;
FIG. 3 is a schematic view in the direction B-B in FIG. 1;
FIG. 4 is a schematic view of the structure of the spring coil;
FIG. 5 is a schematic side view of the mounting block set-up slot side;
FIG. 6 is a schematic cross-sectional view of the mounting block at the detent;
FIG. 7 is a schematic view of the structure of the mounting core;
FIG. 8 is a side cross-sectional view of the compression cover;
FIG. 9 is a schematic plan view of a compression cover;
fig. 10 is a schematic view of the structure of the cable installation module;
FIG. 11 is a schematic diagram of the sensor;
FIG. 12 is a plan view of the overall structure of the present invention;
FIG. 13 is a schematic view of the mounting core inserted into a detent on the mounting block;
FIG. 14 is a C-C cross-sectional view of FIG. 12;
FIG. 15 is a D-D sectional view of FIG. 12;
FIG. 16 is a schematic plan view of a cable stop plate;
fig. 17 is a schematic cross-sectional structure of the cable stop plate.
Detailed Description
The integrated structure of the invention comprises a shell, a sensor mounting module, a cable mounting module and a sensor.
As shown in fig. 1, 2 and 3, the casing 1 is rectangular and includes a rectangular top plate 11, four sides of the top plate are respectively welded with a side plate, and the bottom of the casing is open; a fixing hole 12 is respectively arranged on the top plate near the four corners, one end of the top plate is provided with a mounting hole 13, the mounting hole is a cylinder extending to a certain length in the shell, the inner wall of the mounting hole is provided with internal threads, and the inner side of the bottom of the mounting hole is provided with an annular limiting plate 131 which is coaxial with the mounting hole; the inner wall of the other end of the top plate is provided with a first fixing block 14, a second fixing block 15 is arranged between the first fixing block and the mounting hole, one side of the first fixing block 14, which faces the end part of the top plate, is provided with a first T-shaped jack 141, the front end of the first T-shaped jack penetrates through the other side of the first fixing block, one side of the second fixing block 15, which faces the mounting hole, is provided with a second T-shaped jack 151, the front end of the second T-shaped jack penetrates through the other side of the second fixing block, one ends of the first fixing block and the second fixing block are fixedly connected with the bottom surface of the top plate, and the other end of the first fixing block and the second fixing block are provided with a strip-shaped opening 16 communicated with the T-shaped jack.
The sensor mounting module includes a spring ring, a mounting block, a mounting core, and a compression cover.
The structure of the spring ring is shown in fig. 4, and the diameter of the spring ring 21 is larger than the inner diameter of the annular limiting plate and smaller than or equal to the inner diameter of the mounting hole;
the structure of the mounting block is shown in fig. 5 and 6, the mounting block 22 comprises a cylindrical positioning block 221 with a diameter equal to that of the annular limiting plate, one end of the positioning block is provided with a cylindrical compression block 222 with a diameter equal to that of the mounting hole, one side of the positioning block is provided with a positioning groove 223, and the front end of the positioning groove is provided with a through hole 224 penetrating to the other side of the positioning block;
the structure of the installation core is shown in fig. 7, the installation core 23 is a block body with a shape matched with a positioning groove on a positioning block, the front end of the installation core 23 is connected with a bolt 24, and the rear end of the bolt is fixed in the installation core;
as shown in fig. 8 and 9, the compression cover 25 is a cylinder with a diameter equal to that of the mounting hole or a cylinder with one end sealed, and the outer wall of the compression cover is provided with external threads.
As shown in fig. 10, the cable installation module includes two T-shaped blocks 31, the sizes of the two T-shaped blocks 31 are respectively the same as the T-shaped insertion holes on the first fixed block and the second fixed block on the shell, and a superelastic rubber strip 32 is fixedly connected between the ends of the two T-shaped blocks;
as shown in fig. 11, the rear end of the sensor 4 is provided with a screw hole 41 along the longitudinal direction of the sensor, and the front end is connected with a cable 42.
As shown in fig. 12, 13, 14 and 15, the spring ring 21 is positioned in the mounting hole 13 on the top plate, the lower end of the spring ring is supported on the annular limiting plate 131, the positioning block 221 of the mounting block 22 extends into the shell through the annular limiting plate in the mounting hole, the compression block 222 of the mounting block is pressed on the upper end of the spring ring 21, and the compression cover 25 is screwed in the mounting hole 13 through threads and compresses the compression block 222; the mounting core 23 is inserted into a positioning groove on the positioning block, a bolt 24 at the front end of the mounting core passes through a through hole 224 on the positioning block and is in threaded connection with a screw hole at the rear end of the sensor 4, a fixing nut 26 is in threaded connection with the bolt, and the fixing nut 26 is tightly propped against the outer wall of the positioning block 221 to prevent the mounting core from moving in the positioning groove; the two T-shaped blocks 31 of the cable installation module are respectively inserted into a first T-shaped jack 141 on a first fixed block 14 and a second T-shaped jack 151 on a second fixed block 15 in the shell, the superelastic rubber strip 32 slides to the first T-shaped jack and the second T-shaped jack from strip-shaped openings on the first fixed block and the second fixed block, a cable 42 at the front end of the sensor passes through the second T-shaped jack on the second fixed block 15 and is bound and fixed with one end of the superelastic rubber strip, then the superelastic rubber strip 32 is spirally wound for a certain length and bound and fixed with the other end of the superelastic rubber strip, and finally passes through the first T-shaped jack on the first fixed block 14 and passes out from the side wall of the shell.
As shown in FIG. 4, in the implementation of the present invention, the spring ring 21 may be formed by combining a plurality of springs 211, which are arranged in a circumferential direction and connected by an annular steel wire 212. The spring ring arranged in the mode has the outer diameter equal to the diameter of the mounting hole and the inner diameter larger than that of the annular limiting plate. The structure facilitates the full contact between the top of the spring ring and the bottom of the compression cover, and can prevent the spring ring from moving in the mounting hole.
As shown in fig. 5 and 6, in the implementation of the present invention, the positioning groove 223 on the side wall of the 22 positioning block has a T-shaped cross section along the transverse direction of the positioning block, so as to prevent the mounting core from rotating in the positioning groove.
As shown in fig. 13, in the implementation of the present invention, a screw cap 26 may be screwed to the front end of the mounting core 23, the screw cap is tightly pressed against the front end of the mounting core, a bolt passing hole with a diameter smaller than that of the rear end of the bolt is provided in the middle of the screw cap, and the front end of the bolt 24 passes through the bolt passing hole in the middle of the screw cap 26. The structure can ensure that the rear end of the bolt is fixed in the mounting core.
As shown in fig. 8 and 9, in the implementation of the present invention, a rotating plate 251 may be provided on the top surface of the compression cover 25, and one side of the rotating plate is hinged to the top surface of the compression cover, and may be turned up and down on the top surface of the compression cover, but may not rotate axially around the compression cover. When the compression cover needs to be rotated, the rotating plate is turned over and erected, and the state shown in fig. 8 is convenient for pinching the rotating plate by hand to rotate the compression cover; when rotation is not required, the rotating plate 251 is turned over and laid flat as shown in fig. 9.
In the implementation of the invention, in order to prevent the cable wound on the superelastic rubber block from being scattered, a cable limiting plate can be arranged between the first fixing block and the second fixing block. As shown in fig. 16 and 17, an arc-shaped groove is longitudinally formed on the cable limiting plate 33, two wing plates 331 are respectively arranged on two sides of the arc-shaped groove, and screw holes are formed in the wing plates. As shown in fig. 12 and 15, the cable limiting plate 33 is fastened in the arc-shaped groove by the superelastic rubber strip 32 and the cable 42 wound on the superelastic rubber strip, and two sides of the cable limiting plate are respectively fixed with the inner wall of the shell by screws.
As shown in fig. 12, 14 and 15, when the device is installed in the tunnel, the open side faces the installation surface 5 in the tunnel, long screws 6 are respectively inserted into the 4 fixing holes, and the shell is fixed on the installation surface through the screws. The compression cap is screwed down so that the front end of the positioning block 221 of the mounting block abuts against the mounting surface. The cable line extending to the outside of the housing is electrically connected to an external device.
The sensor is positioned in the shell, so that the sensor can be prevented from being directly hit by flying stones; the sensor is in a suspended state in the shell, so that the sensor in the shell can be well protected even if the shell is deformed due to overlarge impact force of blasting flying stones; the cable conductor can stretch out and draw back along with super-elastic rubber strip, when the flying stone falls to the cable wire outside the casing, under the exogenic action, the cable conductor can pull super-elastic rubber strip extension, plays the cushioning effect, avoids the cable to be broken, reduces the cable conductor damage probability, waits that the flying stone falls after, and the cable conductor atress disappears, then can follow super-elastic rubber strip and resume initial state.
After the construction is completed, the long screw on the shell can be loosened, and the protection device is taken down. In order to prevent the screw from bending and deforming due to excessive impact force of blasting flystones under extreme conditions and incapable of being disassembled normally, when the invention is implemented, as shown in fig. 1 and 12, a disassembling hole 17 can be further formed at one end or both ends of the shell along the transverse direction of the shell. When the normal disassembly is impossible, the reinforcing steel bars can be inserted into the disassembly holes 17, and the shell is pried to be disassembled by adopting the lever principle.
Claims (7)
1. A microseism monitoring sensor and cable conductor protection device for tunnel drilling and blasting method construction, its characterized in that: the sensor comprises a shell, a sensor mounting module, a cable mounting module and a sensor;
the shell is rectangular in shape and comprises a rectangular top plate, the four sides of the top plate are respectively welded with a side plate, and the bottom of the shell is open; a fixing hole is respectively arranged on the top plate and close to the four corners, one end of the top plate is provided with a mounting hole, the mounting hole is a cylinder body extending to a certain length in the shell, the inner wall of the mounting hole is provided with internal threads, and the inner side of the bottom of the mounting hole is provided with an annular limiting plate which is coaxial with the mounting hole; a first fixed block is arranged on the inner wall of the other end of the top plate, a second fixed block is arranged between the first fixed block and the mounting hole, a first T-shaped jack is arranged on one side of the first fixed block, which faces the end part of the top plate, the front end of the first T-shaped jack penetrates through the other side of the first fixed block, a second T-shaped jack is arranged on one side of the second fixed block, which faces the mounting hole, the front end of the second T-shaped jack penetrates through the other side of the second fixed block, one end of the first fixed block and one end of the second fixed block are fixedly connected with the bottom surface of the top plate, and a strip-shaped opening communicated with the T-shaped jack is formed in the other end of the first fixed block and the second fixed block;
the sensor mounting module comprises a spring ring, a mounting block, a mounting core and a compression cover; the diameter of the spring ring is larger than the inner diameter of the annular limiting plate and smaller than or equal to the inner diameter of the mounting hole; the mounting block comprises a cylindrical positioning block with the diameter equal to the inner diameter of the annular limiting plate, one end of the positioning block is provided with a cylindrical compression block with the diameter equal to the diameter of the mounting hole, one side of the positioning block is provided with a positioning groove, and the front end of the positioning groove is provided with a through hole penetrating to the other side of the positioning block; the mounting core is a block body with a shape matched with the positioning groove on the positioning block, the front end of the mounting core is connected with a bolt, and the rear end of the bolt is fixed in the mounting core; the compression cover is a cylinder with the diameter equal to that of the mounting hole or a cylinder with one end sealed, and the outer wall of the compression cover is provided with external threads;
the cable installation module comprises two T-shaped blocks, and a superelastic rubber strip is fixedly connected between the ends of the two T-shaped blocks;
the rear end of the sensor is longitudinally provided with a screw hole along the sensor, and the front end of the sensor is connected with a cable;
the spring ring is positioned in a mounting hole on the top plate, the lower end of the spring ring is supported on the annular limiting plate, a positioning block of the mounting block penetrates through the annular limiting plate in the mounting hole to extend into the shell, a compression block of the mounting block is pressed at the upper end of the spring ring, and the compression cover is in threaded connection in the mounting hole and compresses the compression block; the mounting core is inserted into the positioning groove on the positioning block, a bolt at the front end of the mounting core penetrates through the through hole on the positioning block and is in threaded connection with the screw hole at the rear end of the sensor, a fixing nut is in threaded connection with the bolt, and the fixing nut is tightly propped against the outer wall of the positioning block; the cable of sensor front end passes second T type jack and is fixed with super elastic rubber strip one end ligature, then spiral winding certain length and with super elastic rubber strip other end ligature fixed on super elastic rubber strip, pass first T type jack on the first fixed block and wear out on the casing lateral wall at last in the first T type jack on the first fixed block respectively in the first T type jack on the first fixed block of cable installation module.
2. The microseismic monitoring sensor and cable protection device for tunnel drilling and blasting construction according to claim 1, wherein the microseismic monitoring sensor and cable protection device is characterized in that: the spring ring comprises a plurality of springs which are arranged in a circumferential direction and are connected through annular steel wires.
3. The microseismic monitoring sensor and cable protection device for tunnel drilling and blasting construction according to claim 1, wherein the microseismic monitoring sensor and cable protection device is characterized in that: and the cross section of the positioning groove on the side wall of the positioning block along the transverse direction of the positioning block is of a T-shaped structure.
4. The microseismic monitoring sensor and cable protection device for tunnel drilling and blasting construction according to claim 1, wherein the microseismic monitoring sensor and cable protection device is characterized in that: the front end of the installation core is in threaded connection with a screw cover, a bolt passing hole with the diameter smaller than that of the rear end of the bolt is formed in the middle of the screw cover, and the front end of the bolt penetrates out of the bolt passing hole in the middle of the screw cover.
5. The microseismic monitoring sensor and cable protection device for tunnel drilling and blasting construction according to claim 1, wherein the microseismic monitoring sensor and cable protection device is characterized in that: the top surface of the compression cover is provided with a rotating plate, and one side of the rotating plate is hinged with the top surface of the compression cover and can be turned over on the compression cover.
6. The microseismic monitoring sensor and cable protection device for tunnel drilling and blasting construction according to claim 1, wherein the microseismic monitoring sensor and cable protection device is characterized in that: a cable limiting plate is arranged between the first fixing block and the second fixing block, an arc-shaped groove is longitudinally formed in the cable limiting plate, the superelastic rubber strip and a cable wound on the superelastic rubber strip are buckled in the arc-shaped groove by the cable limiting plate, and two sides of the cable limiting plate are respectively fixed with the inner wall of the shell through screws.
7. The microseismic monitoring sensor and cable protection device for tunnel drilling and blasting construction according to claim 1, wherein the microseismic monitoring sensor and cable protection device is characterized in that: one end or two ends of the shell are respectively provided with a disassembly hole along the transverse direction of the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111427053.8A CN114114388B (en) | 2021-11-28 | 2021-11-28 | Microseism monitoring sensor and cable protection device for tunnel drilling and blasting method construction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111427053.8A CN114114388B (en) | 2021-11-28 | 2021-11-28 | Microseism monitoring sensor and cable protection device for tunnel drilling and blasting method construction |
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| Publication Number | Publication Date |
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| CN114114388A CN114114388A (en) | 2022-03-01 |
| CN114114388B true CN114114388B (en) | 2024-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111427053.8A Active CN114114388B (en) | 2021-11-28 | 2021-11-28 | Microseism monitoring sensor and cable protection device for tunnel drilling and blasting method construction |
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