CN115451833A - Tunnel surrounding rock top displacement continuous monitoring device and method - Google Patents
Tunnel surrounding rock top displacement continuous monitoring device and method Download PDFInfo
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- CN115451833A CN115451833A CN202211205028.XA CN202211205028A CN115451833A CN 115451833 A CN115451833 A CN 115451833A CN 202211205028 A CN202211205028 A CN 202211205028A CN 115451833 A CN115451833 A CN 115451833A
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- 239000011435 rock Substances 0.000 title claims abstract description 93
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000012806 monitoring device Methods 0.000 title claims description 19
- 238000012544 monitoring process Methods 0.000 claims abstract description 68
- 230000007246 mechanism Effects 0.000 claims abstract description 37
- 238000009434 installation Methods 0.000 claims description 9
- 230000006698 induction Effects 0.000 claims description 5
- 230000004044 response Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 description 9
- 230000009471 action Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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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
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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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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- Machines For Laying And Maintaining Railways (AREA)
Abstract
The invention discloses a device and a method for continuously monitoring displacement of the top of tunnel surrounding rock, which belong to the technical field of surrounding rock displacement monitoring and comprise the following steps: the device comprises a track and a support, wherein the track is installed at the top of surrounding rock, the support can slide along the track, the support is connected with a sliding mechanism used for driving the support to slide back and forth along the track, the support is connected with a connecting shaft in a sliding mode, the first end of the connecting shaft is rotatably connected with a first roller, the first roller is in contact connection with the top of the surrounding rock, the second end of the connecting shaft is in spherical hinge connection with a laser emitting assembly, the laser emitting assembly is in limited sliding connection with the track, a monitoring plate which is consistent with the axis direction of the track is installed on one side of the track and fixedly connected with the track, a photosensitive sensor group is laid on the monitoring plate, and a spring is installed between the first roller and the support. According to the invention, the monitoring data of any point in the moving distance of the laser emission component can be obtained by moving the laser emission component to and fro to irradiate the monitoring plate, so that the continuous monitoring of the top displacement of the surrounding rock is realized, and the monitoring effect is improved.
Description
Technical Field
The invention belongs to the technical field of surrounding rock displacement monitoring, and particularly relates to a continuous monitoring device and method for tunnel surrounding rock top displacement.
Background
In the tunnel excavation process, due to reasons such as construction machinery disturbance, the surrounding rock at the top of the tunnel is easy to expand or the vertical displacement of the top of the surrounding rock is changed due to faults, so that the displacement of the surrounding rock in the tunnel excavation process needs to be monitored to determine the stability of the surrounding rock structure.
The traditional monitoring mode is that a multipoint displacement meter is uniformly and discontinuously arranged at the top of the surrounding rock for monitoring, or as disclosed in the Chinese patent CN 114485426B, an optical detector for detecting the structural stability of the surrounding rock of the tunnel and a method thereof, displacement data are obtained by uniformly and discontinuously arranging a scale at the top of the surrounding rock and irradiating by adopting a laser emission component.
Driven monitoring mode all can only monitor at the country rock top through arranging monitoring mechanism evenly to be interrupted, can't monitor the unable monitoring of country rock displacement between the monitoring mechanism, can not carry out continuous monitoring to the displacement of any one point at country rock top, and extravagant cost.
Disclosure of Invention
In view of this, the invention aims to provide a device and a method for continuously monitoring displacement of the top of a tunnel surrounding rock, which are used for solving the problem that displacement of any point of the top of the surrounding rock cannot be continuously monitored in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a continuous monitoring device for tunnel surrounding rock top displacement, which comprises: install at the track at country rock top and can be along the gliding support of track, the support is connected with and is used for driving the support along the gliding sliding mechanism that reciprocates of track, sliding connection has the connecting axle on the support, the first end of connecting axle is rotated and is connected with first gyro wheel, first gyro wheel is connected with the contact of country rock top, connecting axle second end ball pivot is connected with the laser emission subassembly, the spacing sliding connection of laser emission subassembly and track, track one side install with the monitoring board that track axis direction is unanimous, the monitoring board with track fixed connection, the monitoring board upper berth is equipped with the photosensitive sensor group, the laser emission subassembly is used for shining the photosensitive sensor group in order to obtain response data, first gyro wheel with install the spring between the support.
Further, the track passes through installation mechanism to be installed at the country rock top, installation mechanism includes two at least mountings and elastic component, mounting one end fixed connection is at the country rock top, the mounting numerical value sets up, elastic component one end fixed connection be in on the mounting outer wall, elastic component other end fixed connection be in on the track, the mounting is worn to establish the track and with track sliding connection.
Further, the mounting includes connecting portion and sliding part, the first end fixed connection of connecting portion is at the country rock top, connecting portion second end with the sliding part ball pivot is connected, the track with sliding part sliding connection, elastic component one end with connecting portion fixed connection, the elastic component other end with 1 fixed connection of track.
Further, a plurality of the elastic member with the axis direction circumference setting of mounting, the elastic member includes: the telescopic link and the cover are established powerful spring on the telescopic link, telescopic link first end fixed connection be in on the mounting, telescopic link second end fixed connection be in on the track.
Further, install the connecting pipe on the support, all install the connecting axle both sides the connecting pipe, be close to in the connecting pipe laser emission subassembly side sliding connection has first slide bar, be close to country rock top side sliding connection has the second slide bar in the connecting pipe, first slide bar with the second slide bar can be sealed the connecting pipe, the second slide bar is kept away from first slide bar side is connected with the second gyro wheel, second gyro wheel and country rock top roll connection, first slide bar is kept away from second slide bar side with laser emission subassembly fixed connection, both sides the second slide bar with contained angle between the connecting axle is the same.
Further, the sliding part is kept away from the connector end can be dismantled and be connected with the balancing weight, the balancing weight can restrict the track and landing from the sliding part.
The invention also provides a continuous monitoring method for the displacement of the top of the tunnel surrounding rock, which comprises the following steps:
s1: after the continuous monitoring device for tunnel surrounding rock top displacement as claimed in any one of claims 1 to 6 is installed at the top of the tunnel surrounding rock, the sliding mechanism drives the laser emission assembly to reciprocate on the rail for a circle, then the sliding mechanism is closed, and the sensing data obtained by the photosensitive sensor group is converted into an original data curve through a computer;
s2: starting the sliding mechanism again to drive the laser emission assembly to move back and forth on the track;
s3: the method comprises the steps of recording induction data obtained by a photosensitive sensor group through a computer to form a monitoring data curve, comparing the monitoring data curve with an original data curve, and judging that the corresponding surrounding rock position needs to be supported when the height difference between any point on the monitoring data curve and the corresponding position of the original data curve exceeds a preset range
The invention has the beneficial effects that:
according to the invention, the monitoring plate is irradiated by reciprocating the laser emission assembly, so that the monitoring data of any point in the movement distance of the laser emission assembly can be obtained, thereby realizing the continuous monitoring of the displacement of the top of the surrounding rock and improving the monitoring effect; a plurality of monitoring mechanisms are not required to be arranged at the top of the surrounding rock, so that the problem that the displacement of the top of the surrounding rock cannot be monitored in gaps between every two monitoring mechanisms is avoided, and the cost is saved; the spring is arranged, so that the first roller is always in contact with the top of the surrounding rock, the monitoring accuracy is improved, and the laser emission assembly is connected with the rail in a sliding manner, so that the monitoring effect is prevented from being influenced by shaking in the moving process of the laser emission assembly; through laser emission subassembly and connecting axle ball pivot be connected, make the laser emission subassembly keep vertical, avoid the track slope to cause the laser emission subassembly slope and influence the monitoring effect.
Additional advantages, objects, and features of the invention will be set forth in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof.
Drawings
In order to make the purpose, technical scheme and beneficial effect of the invention more clear, the invention provides the following drawings for explanation:
FIG. 1 is a side view of an embodiment of the monitoring device of the present invention;
FIG. 2 is a schematic view of a track mounting structure of a monitoring device according to an embodiment of the present invention;
FIG. 3 is an installed elevation view of a monitoring device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an elastic member of the monitoring device according to the embodiment of the invention.
The drawings are numbered as follows: 1. a track; 2. an installation mechanism; 201. a fixing member; 202. an elastic member; 203. a connecting portion; 204. a sliding part; 205. a telescopic rod; 206. a strong spring; 3. a support; 301. a connecting pipe; 302. a first slide bar; 303. a second slide bar; 304. a second roller; 4. a sliding mechanism; 5. a connecting shaft; 6. a first roller; 7. a laser emitting assembly; 8. a monitoring plate; 9. a spring; 10. a balancing weight; 11. the top of the surrounding rock.
Detailed Description
As shown in fig. 1 to 4, the present invention provides a continuous monitoring device for tunnel surrounding rock top displacement, comprising: the monitoring device comprises a track 1, wherein the track 1 is arranged at the top of surrounding rocks through an installation mechanism 2, a support 3 capable of sliding along the track 1 is arranged on the track 1, the support 3 is connected with a sliding mechanism 4, the sliding mechanism 4 is used for driving the support 3 to slide back and forth along the track 1, a connecting shaft 5 is connected on the support 3 in a sliding manner, a first end of the connecting shaft 5 is connected with a first roller 6, the first roller 6 is in contact connection with the top of the surrounding rocks, a second end of the connecting shaft 5 is connected with a laser emission assembly 7 in a spherical hinge manner, the laser emission assembly 7 is in limited sliding connection with the track 1, a monitoring plate 8 consistent with the axis direction of the track 1 is arranged on one side of the track 1, the monitoring plate 8 is fixedly connected with the track 1, a photosensitive sensor group is paved on the monitoring plate 8, the laser emission assembly 7 is used for irradiating the photosensitive sensor group to obtain induction data, and a spring 9 is arranged between the first roller 6 and the support 2; the sliding mechanism 4 comprises a driving mechanism and a reciprocating screw rod connected with the driving mechanism, the reciprocating screw rod is in threaded connection with the support 3, and the driving mechanism is used for driving the reciprocating screw rod to rotate so as to enable the support 3 to move in a reciprocating mode along the reciprocating screw rod.
The working principle of the technical scheme is as follows: as shown in fig. 1 and 3, with track 1 both ends through installation mechanism 2 fixed mounting at the country rock top, slide mechanism 4 can drive support 3 along track 1 reciprocating sliding, drive reciprocal lead screw through actuating mechanism and rotate, thereby for driving support 3 along track 1 reciprocating sliding, thereby drive laser emission subassembly 7 along track 1 reciprocating sliding, at reciprocating sliding in-process, first gyro wheel 6 passes through spring 9 and remains throughout with the contact of country rock top, if the expansion appears in arbitrary a bit in country rock top or when other reasons cause the displacement to appear in country rock top, first gyro wheel 6 drives laser emission subassembly 7 longitudinal movement through connecting axle 5, shine the photosensitive sensor group on the monitoring board 8 and appear the longitudinal displacement difference, thereby obtain the displacement monitoring data at country rock top.
The beneficial effects of the above technical scheme are as follows: monitoring data of any point in the moving distance of the laser emission assembly 7 can be obtained by moving the laser emission assembly 7 back and forth to irradiate the monitoring plate 8, so that the continuous monitoring of the displacement of the top of the surrounding rock is realized, and the monitoring effect is improved; a plurality of monitoring mechanisms are not required to be arranged at the top of the surrounding rock, so that the problem that the displacement of the top of the surrounding rock cannot be monitored in gaps between every two monitoring mechanisms is avoided, and the cost is saved; the spring 9 is arranged, so that the first roller 6 is guaranteed to be always in contact with the top of the surrounding rock, the monitoring accuracy is improved, and the laser emission assembly 7 is connected with the rail 1 in a sliding mode, so that the monitoring effect is prevented from being influenced by shaking in the moving process of the laser emission assembly 7; through laser emission subassembly 7 and connecting axle 5 ball pivot connection, make laser emission subassembly 7 keep vertical, avoid track 1 slope to cause laser emission subassembly 7 slope and influence the monitoring effect.
In an embodiment of the present invention, the mounting mechanism 2 includes a fixing member 201 and an elastic member 202, one end of the fixing member 201 is fixedly connected to the top of the surrounding rock, the fixing member is vertically disposed, one end of the elastic member 202 is fixedly connected to the outer wall of the fixing member 201, the other end of the elastic member 202 is fixedly connected to the rail 1, and the fixing member 201 penetrates through the rail 1 and is slidably connected to the rail 1.
The working principle of the technical scheme is as follows: as shown in fig. 3, at least two or more fixing members 201 are fixedly installed on the top of the surrounding rock, the rail 1 is slidably connected with the fixing members 201, and in an initial state of installation, after the rail 1 is installed on the two or more fixing members 201, the axial direction of the rail 1 is perpendicular to the axial direction of the fixing members 201, because the fixing members 201 are vertically installed on the top of the surrounding rock, that is, after the installation is completed, the rail 1 is in a horizontal state under the connecting action of the elastic members 202, when the surrounding rock on the side close to the fixing members 201 expands to cause the longitudinal displacement of the fixing members 201, so that a height difference occurs between the two fixing members 201, because the fixing members 201 are vertical, the rail 1 is always perpendicular to the fixing members 201 under the action of the two or more fixing members 201, the rail 1 is always kept in a horizontal state, and at this time, the connecting action on the rail 1 is kept by the elastic members 202 on both sides.
The beneficial effects of the above technical scheme are that: through the design of above-mentioned structure, avoid leading to track 1 slope when longitudinal displacement appears in the connection position of track 1 and country rock top, and cause laser emission subassembly 7 to carry out reciprocating motion on the track 1 of slope, influence monitoring data's accuracy.
In an embodiment of the present invention, the fixing member 201 includes a connecting portion 203 and a sliding portion 204, a first end of the connecting portion 203 is fixedly connected to the top of the surrounding rock, a second end of the connecting portion 203 is connected to the sliding portion 204 in a ball hinge manner, the rail 1 is connected to the sliding portion 204 in a sliding manner, one end of the elastic member 202 is fixedly connected to the connecting portion 203, and the other end of the elastic member 202 is fixedly connected to the rail 1.
The working principle of the technical scheme is as follows: as shown in fig. 2, after at least two fixing members 201 are fixedly installed on the top of the surrounding rock, when the surrounding rock near the fixing members 201 expands to cause the two fixing members 201 to tilt synchronously, in order to avoid the two fixing members 201 from tilting synchronously to cause the track 1 to tilt, the connecting portion 203 and the sliding portion 204 are connected in a ball hinge manner, so that after the connecting portion 203 tilts in any direction, the sliding portion 204 always keeps a vertical state under the action of gravity, and the track 1 always keeps a horizontal state.
The beneficial effects of the above technical scheme are that: through the design of the structure, the problem that the accuracy of monitoring data is influenced due to the fact that the track 1 is inclined when the two connecting parts 203 are synchronously inclined in any direction is avoided; the rail 1 is always kept in a horizontal state, and the laser emitting assembly 7 always horizontally reciprocates, so that the displacement of any position of the top of the surrounding rock is accurately monitored.
In an embodiment of the present invention, a plurality of the elastic members 202 are circumferentially arranged in an axial direction of the fixing member 201, and the elastic members 202 include: the telescopic link 205, the first end fixed connection of telescopic link 205 is in on the mounting 201, telescopic link 205 second end fixed connection is in on the track 1, the cover is equipped with powerful spring 206 on the telescopic link 205.
The working principle and the beneficial effects of the technical scheme are as follows: as shown in fig. 4, the plurality of elastic members 202 are circumferentially arranged along the axial direction of the fixing member 201, so that the mounting stability of the rail 1 is improved; the strong spring 206 is sleeved on the telescopic rod 205, and when the rail 1 slides on the fixing part 201, the telescopic rod 205 is stretched or compressed, so that the strong spring 206 is stretched or compressed along the telescopic rod 205, and the phenomenon that the stability of the rail 1 is influenced by the bending of the strong spring 206 is avoided.
In an embodiment of the present invention, a connecting pipe 301 is installed on the support 3, the connecting pipe 301 is installed on both sides of the connecting shaft 5, a first sliding rod 302 is slidably connected inside the connecting pipe 301 close to the laser emission assembly 7, a second sliding rod 303 is slidably connected inside the connecting pipe 301 close to the top of the surrounding rock, the connecting pipe 301 can be sealed by the first sliding rod 302 and the second sliding rod 303, a second roller 304 is connected on the side of the second sliding rod 303 far away from the first sliding rod 302, the second roller 304 is connected with the top of the surrounding rock in a rolling manner, the side of the first sliding rod 302 far away from the second sliding rod 303 is fixedly connected with the laser emission assembly 7, and the included angles between the second sliding rods 303 on both sides and the connecting shaft 5 are the same.
The working principle of the technical scheme is as follows: as shown in fig. 1, the first roller 6 and the second roller 304 are both connected to the top of the surrounding rock in a rolling manner, when the surrounding rock on the side of the second roller 304 displaces, the second roller 304 drives the second slide bar 303 to slide, the second slide bar 303 slides towards the side close to the first slide bar 302, and the pressure of the cavity between the second slide bar 303 and the first slide bar 302 is constant, so that the first slide bar 302 is driven to slide, and the laser emitting assembly 7 is driven to move.
The beneficial effects of the above technical scheme are that: the second rollers 304 are arranged on the two sides of the first roller 6 at equal angles, so that surrounding rocks close to the second rollers 304 can be displaced to drive the laser emission assembly 7 to longitudinally displace, and the monitoring range is enlarged; the second roller 304 and the first roller 6 are positioned on the same plane, so that the monitoring data is not clear due to dislocation, and the monitoring accuracy is improved; and the pressure of the cavity between the second sliding rod 303 and the first sliding rod 302 is constant, so that the second roller 304 can be always in contact with the top of the surrounding rock.
In one embodiment of the present invention, the sliding part 204 is detachably connected with a counterweight 10 away from the top end of the surrounding rock, and the counterweight 10 can limit the rail 1 from sliding off the sliding part 204.
The working principle of the technical scheme is as follows: as shown in fig. 2, the end of the sliding portion 204 far away from the top of the surrounding rock is provided with a screw hole, the counterweight block 10 is provided with a screw rod matched with the screw hole, and the counterweight block 10 is matched with the screw hole through the screw rod to detachably connect with the fixed sliding portion 204.
The beneficial effects of the above technical scheme are as follows: through setting up balancing weight 10, increased the weight of sliding part 204, guaranteed that sliding part 204 keeps vertical under the effect of balancing weight 10 gravity, and the size of balancing weight 10 is greater than the size of sliding part 204, when elastic component 202 drops with track 1 because of the construction reason, balancing weight 10 can prevent that track 1 from landing from sliding part 204 to tunnel construction's security has been guaranteed.
The invention also provides a continuous monitoring method for the displacement of the top of the tunnel surrounding rock, which comprises the following steps:
s1: after a continuous monitoring device for tunnel surrounding rock top displacement is installed at the top of the tunnel surrounding rock, a sliding mechanism 4 is closed after a laser emission assembly 7 is driven to reciprocate for a circle on a track 1 through the sliding mechanism 4, and induction data obtained by a photosensitive sensor group is converted into an original data curve through a computer;
s2: the sliding mechanism 4 is started again to drive the laser emission component 7 to move on the track 1 in a reciprocating mode;
s3: and recording the induction data obtained by the photosensitive sensor group through a computer to form a monitoring data curve, comparing the monitoring data curve with the original data curve, and judging that the corresponding surrounding rock position needs to be supported when the height difference between any one point on the monitoring data curve and the corresponding position of the original data curve exceeds a preset range.
The working principle and the beneficial effects of the technical scheme are as follows: through the design of the steps, any point at the top of the surrounding rock can be monitored in the continuous monitoring process, a plurality of monitoring mechanisms are not required to be arranged, and the problem that the displacement of the top of the surrounding rock cannot be monitored in gaps between every two monitoring mechanisms is avoided; through the comparison of the monitoring data curve and the original data curve, whether the longitudinal displacement of any point at the top of the surrounding rock exceeds a preset value or not can be judged in time, so that the surrounding rock is supported in time, and the stability of the surrounding rock and the safety of tunnel construction are guaranteed.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (7)
1. The utility model provides a tunnel country rock top displacement continuous monitoring device which characterized in that includes: install at the track at country rock top and can be along the gliding support of track, the support is connected with and is used for driving the support along the gliding sliding mechanism that reciprocates of track, sliding connection has the connecting axle on the support, the first end of connecting axle is rotated and is connected with first gyro wheel, first gyro wheel is connected with the contact of country rock top, connecting axle second end ball pivot is connected with the laser emission subassembly, the spacing sliding connection of laser emission subassembly and track, track one side install with the monitoring board that track axis direction is unanimous, the monitoring board with track fixed connection, the monitoring board upper berth is equipped with the photosensitive sensor group, the laser emission subassembly is used for shining the photosensitive sensor group in order to obtain response data, first gyro wheel with install the spring between the support.
2. The continuous monitoring device for tunnel surrounding rock top displacement according to claim 1, characterized in that: the track passes through installation mechanism to be installed at the country rock top, installation mechanism includes two at least mountings and elastic component, mounting one end fixed connection is at the country rock top, the mounting numerical value sets up, elastic component one end fixed connection be in on the mounting outer wall, elastic component other end fixed connection be in on the track, the mounting is worn to establish the track and with track sliding connection.
3. The continuous monitoring device of tunnel country rock top displacement of claim 2 characterized in that: the mounting includes connecting portion and sliding part, the first end fixed connection of connecting portion is at the country rock top, connecting portion second end with the sliding part ball pivot is connected, the track with sliding part sliding connection, elastic component one end with connecting portion fixed connection, the elastic component other end with 1 fixed connection of track.
4. The continuous monitoring device for tunnel surrounding rock top displacement according to claim 2, characterized in that: a plurality of the elastic member with the axis direction circumference setting of mounting, the elastic member includes: the telescopic link and the cover are established powerful spring on the telescopic link, telescopic link first end fixed connection be in on the mounting, telescopic link second end fixed connection be in on the track.
5. The continuous monitoring device of tunnel country rock top displacement of claim 1 characterized in that: install the connecting pipe on the support, the connecting axle both sides are all installed the connecting pipe, be close to in the connecting pipe laser emission subassembly side sliding connection has first slide bar, be close to country rock top side sliding connection has the second slide bar in the connecting pipe, first slide bar with the second slide bar can be sealed the connecting pipe, the second slide bar is kept away from first slide bar side is connected with the second gyro wheel, second gyro wheel and country rock top roll connection, first slide bar is kept away from second slide bar side with laser emission subassembly fixed connection, both sides the second slide bar with contained angle between the connecting axle is the same.
6. The continuous monitoring device of tunnel country rock top displacement of claim 3 characterized in that: the sliding part is far away from the end of the connecting part is detachably connected with a balancing weight, and the balancing weight can limit the rail to slide down from the sliding part.
7. A continuous monitoring method for tunnel surrounding rock top displacement is characterized by comprising the following steps:
s1: after the continuous monitoring device for tunnel surrounding rock top displacement as claimed in any one of claims 1 to 6 is installed at the top of the tunnel surrounding rock, the sliding mechanism drives the laser emission assembly to reciprocate on the rail for a circle, then the sliding mechanism is closed, and the sensing data obtained by the photosensitive sensor group is converted into an original data curve through a computer;
s2: starting the sliding mechanism again to drive the laser emission assembly to move back and forth on the track;
s3: the induction data obtained by the photosensitive sensor group is recorded by a computer to form a monitoring data curve, the monitoring data curve is compared with an original data curve, and when the height difference between any point on the monitoring data curve and the corresponding position of the original data curve exceeds a preset range, the corresponding surrounding rock position is judged to need supporting.
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| CN202211205028.XA CN115451833A (en) | 2022-09-29 | 2022-09-29 | Tunnel surrounding rock top displacement continuous monitoring device and method |
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| CN202211205028.XA CN115451833A (en) | 2022-09-29 | 2022-09-29 | Tunnel surrounding rock top displacement continuous monitoring device and method |
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Cited By (1)
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| CN116409082A (en) * | 2023-02-06 | 2023-07-11 | 安徽建筑大学 | Multi-plane placed sand painting color sand box |
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