CN108072363B - Tunnel engineering monitoring measurement point protection device and installation method - Google Patents
Tunnel engineering monitoring measurement point protection device and installation method Download PDFInfo
- Publication number
- CN108072363B CN108072363B CN201711482396.8A CN201711482396A CN108072363B CN 108072363 B CN108072363 B CN 108072363B CN 201711482396 A CN201711482396 A CN 201711482396A CN 108072363 B CN108072363 B CN 108072363B
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- measuring point
- fixed
- protective cover
- measuring
- monitoring
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000009434 installation Methods 0.000 title abstract description 5
- 238000005259 measurement Methods 0.000 title description 9
- 230000001681 protective effect Effects 0.000 claims abstract description 33
- 238000005553 drilling Methods 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 238000004873 anchoring Methods 0.000 claims description 8
- 239000011435 rock Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 10
- 238000005422 blasting Methods 0.000 abstract description 4
- 239000004575 stone Substances 0.000 abstract description 4
- 238000009412 basement excavation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Lining And Supports For Tunnels (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention relates to a damage-proof protection device for monitoring points in tunnel engineering and an installation method thereof. Before the measuring point is buried, a middle shaft fixing nut is sleeved on the measuring point connecting rod, the measuring point is put into a reserved drilling hole, and the measuring point is fixed in a tunnel vault or a side wall. After fixing, the measuring point leaks out, and a reflecting sheet is attached. The protective cover is connected with the measuring point through the fixing bracket and is fixed on the side wall through the middle shaft fixing nut. The invention can effectively prevent the measuring point from being damaged by blasting flying stones or tunnel construction machinery because of surrounding the measuring point in an annular manner, can well meet the measuring requirement of the measuring point, and has the advantages of simple structure, simple operation and the like.
Description
Technical Field
The invention relates to the field of tunnel engineering monitoring and measuring, in particular to a damage-preventing protection device for monitoring and measuring points and an installation method.
Background
The tunnel construction process often causes redistribution of surrounding rock stress and release of ground stress. Therefore, after the tunnel is excavated, the tunnel vault can be settled, and convergence deformation can be generated in the radial direction. Monitoring and measurement are one of important links in the tunnel construction process, and through analysis of measurement data, whether the primary support is safe and reasonable can be checked, stability and stress strain state of the surrounding rock support can be effectively evaluated, and meanwhile, secondary lining construction time can be reasonably determined. The method relies on effective measurement in construction monitoring, and thus, the design is corrected, modified and the construction is guided, so that the purposes of safety and economy are achieved.
The auxiliary device commonly adopted in the monitoring and measuring process is a convergence measuring point hook, and monitoring points are often distributed at a position which is not far away from an excavation section, so that surrounding rock deformation data in the excavation of a face can be timely obtained. There are some drawbacks to using a converging point hook. (1) After the convergence measuring point hooks are distributed, a large part of the hooks are exposed out of the side wall. The broken stone of the blasting of the face possibly hits the measuring point, and the measuring point hook is deformed due to the construction of large machinery, the slag removal truck and the forklift hitting the measuring point; (2) In the traditional convergence point hook, only a convergence point can be measured by a convergence meter. For tunnels with large sections, although the convergence gauge has high detection precision, vault settlement cannot be measured smoothly, and the tunnel needs to be operated on a platform truck, so that the tunnel is relatively inconvenient. The convergence assisting device of the total station is used, and has the function of a convergence meter, and is convenient and simple to operate, but has lower visibility in a dim and dusty tunnel environment, so that the measurement accuracy is lower.
Disclosure of Invention
In order to solve the technical problems, the invention provides the tunnel monitoring measurement point protection device which is simple in structure and convenient to assemble.
The invention solves the problems by adopting the following technical scheme:
a damage-proof protection device for monitoring points in tunnel engineering comprises a protection cover, a bracket nut, a fixed bracket, a middle shaft fixing nut and an illuminating lamp; the protective cover is provided with a threaded hole, and one end of the fixed bracket penetrates through the threaded hole and is fixed on the fixed bracket through a nut; the other end is fixed on a monitoring rod of the monitoring point through a middle shaft fixing nut; and the illuminating lamp is arranged on the protective cover.
Further, one end of the fixing support is provided with threads, and the other end of the fixing support is provided with a semi-annular fixing piece inclined 135 degrees with the axis of the support.
Further, the three fixing brackets are arranged and are uniformly arranged along the circumferential direction of the protective cover.
Furthermore, the inner diameter of the semi-annular fixing piece is slightly larger than the diameter of the measuring point rod.
Furthermore, the protective cover is of a conical tubular structure with a notch.
Furthermore, the circumference of the protective cover is 270 degrees annularly, the axial direction of the protective cover is 45 degrees inclined, the height of the protective cover is 10cm, and three bolt holes are formed in the protective cover.
Further, the illuminating lamp is externally connected with a power storage battery and is fixed on two sides of the reserved notch of the protective cover.
Furthermore, the monitoring rod is phi 22 or phi 25 screw steel, one end of the rod is welded with an iron sheet stuck with a reflection sheet, and the other end of the rod is anchored in the drill hole through an anchoring agent.
Furthermore, the size of the middle shaft fixing nut is matched with the diameter of the measuring point rod, and the middle shaft fixing nut is pre-placed at one end close to the measuring point reflector before the measuring point is anchored.
The specific installation method is as follows:
firstly, drilling holes in a wall body according to requirements, anchoring measuring points by using an anchoring agent, penetrating the drilled holes through the primary lining concrete, and penetrating into surrounding rock by about 20-30 cm; the fixing support is provided with threads which penetrate through the reserved bolt holes of the protective cover and are fixed by support nuts, the protective device is assembled, and the LED lamps are fixed on two sides of the reserved notch of the protective cover and used for increasing the visibility of the measuring point; one ends of the semi-annular fixing sheets of the three fixing supports are clamped on the measuring point rod, the fixing nuts of the middle shaft are used for pressing and fixing, the notch of the protective cover and the reflecting sheet face to the measuring direction, and the measuring point is measured through the notch by the total station.
The beneficial effects of the invention are as follows:
the protection device can prevent the measuring points from being damaged by blasting flying stones or construction machinery, and the manufacturing and assembling processes are simple, convenient and quick, and the construction efficiency can be improved. The annular protection device is provided with a notch, so that the measuring point can be protected and the measurement is not influenced. The side wall of the protection device is provided with the LED lamp, so that the definition of the measuring point is increased, the measuring error is effectively reduced, and meanwhile, the LED lamp can play a role in warning to remind the site of paying attention to the protection of the measuring point.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application.
FIG. 1 is an overall schematic diagram of a station layout;
FIG. 2 is a schematic diagram of the overall structure of the protection device;
FIG. 3 is a schematic view of a protective cover body;
FIG. 4 is a schematic view of a stationary bracket;
in the figure: 1 protection cover, 2 support nuts, 3 fixed brackets, 4 measuring points, 5 axis fixed nuts and 6LED lamps.
Detailed description of the preferred embodiments
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
As shown in fig. 1 and 2, the anti-damage protection device for monitoring points in tunnel engineering comprises a protection cover 1, a bracket nut 2, a fixed bracket 3, a measuring point 4, a middle shaft fixing nut 5 and an LED lamp 6;
the protective cover 1 is provided with a threaded hole, one end of the fixed bracket penetrates through the threaded hole and is fixed on the fixed bracket through a nut; the other end is fixed on a monitoring rod of the monitoring point through a middle shaft fixing nut; and the illuminating lamp is arranged on the protective cover.
As shown in fig. 4, one end of the fixed bracket 3 is provided with threads, and the other end is provided with a semi-annular fixing piece inclined 135 degrees with the axis of the bracket. The fixed bolster is provided with three, and three fixed bolster evenly set up along the circumferencial direction of safety cover. The inner diameter of the semi-annular fixing piece is slightly larger than the diameter of the measuring point rod.
As shown in fig. 3, the protective cover 1 has a tapered cylindrical structure with a notch. The protection cover is 270 degrees in the circumferential direction, is inclined by 45 degrees in the axial direction, has the height of 10cm and is provided with three bolt holes.
The external power storage battery of light is fixed in the safety cover and reserves the opening both sides.
The monitoring rod is phi 22 or phi 25 screw steel, one end of the rod is welded with an iron sheet stuck with a reflection sheet, and the other end of the rod is anchored in the drill hole through an anchoring agent.
The size of the middle shaft fixing nut 5 is matched with the diameter of the measuring point rod, and the middle shaft fixing nut is pre-placed at one end close to the measuring point reflector before the measuring point is anchored.
Drilling holes on the wall body at the top of the tunnel and the side walls at the two sides, penetrating through the primary support concrete, and penetrating into surrounding rock by about 20-30 cm, wherein the diameter of the holes is matched with the diameter of the measuring point rods. The measuring point rod is phi 22 or phi 25 screw steel, one end of the rod is welded with an iron sheet stuck with a reflection sheet, and the other end of the rod is anchored in the drill hole through an anchoring agent. And the part of the leakage reflection sheet at the fixed measuring point is about 5cm away from the side wall.
The fixed bracket 3 passes through a reserved screw hole on the protective cover 1 and is fixed on the protective cover 1 through a bracket nut 2; the LED lamp 6 is fixed on two sides of the reserved opening of the protective cover 1, and is externally connected with a power storage battery.
The assembled protective cover 1 is connected with the measuring point 4 through the middle shaft fixing nut 5, and the concrete operation is that one end of each of the three fixing brackets, which is provided with the semi-annular fixing piece, is clamped on the measuring point rod, and the middle shaft fixing nut is used for pressing and fixing.
The annular protection device can prevent the measuring points from being damaged by blasting flying stones or construction machinery; the reflection sheet and the total station are adopted for measurement, so that the monitoring efficiency can be improved. The visibility is improved through the LED lamp.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (6)
1. The anti-damage protection device for the monitoring points in the tunnel engineering is characterized by comprising a protection cover, a bracket nut, a fixed bracket, a middle shaft fixing nut and an illuminating lamp; the protective cover is provided with a threaded hole, and one end of the fixed bracket penetrates through the threaded hole and is fixed on the fixed bracket through a nut; the other end is fixed on a monitoring rod of the monitoring point through a middle shaft fixing nut; the illuminating lamp is arranged on the protective cover;
one end of the fixed support is provided with threads, and the other end of the fixed support is provided with a semi-annular fixed sheet inclined 135 degrees with the axis of the support;
the protective cover is of a conical tubular structure with a notch, and the measuring point is protected without influencing the measuring work; the illuminating lamp is externally connected with a power storage battery and is fixed at two sides of a reserved gap of the protective cover;
the monitoring rod is screw steel, one end of the screw steel is welded with an iron sheet stuck with a reflection sheet, and the other end of the screw steel is anchored in a drill hole through an anchoring agent; the drill holes are arranged on the wall body at the top of the tunnel and the side walls at the two sides, penetrate through the primary support concrete and extend into surrounding rock for 20-30 cm;
one end of the fixing support, which is provided with a semi-annular fixing piece, is clamped on the monitoring rod, the fixing support is pressed and fixed by a middle shaft fixing nut, the notch of the protective cover and the reflecting piece face to the measuring direction, and the measuring point is measured through the notch by the total station.
2. The device for protecting the monitoring points from damage in tunnel engineering according to claim 1, wherein three fixing brackets are provided and are uniformly arranged along the circumferential direction of the protective cover.
3. The device of claim 1, wherein the semi-annular stator has an inner diameter slightly larger than the diameter of the measuring point rod.
4. The device for protecting the monitoring point from damage in tunnel engineering according to claim 1, wherein the protective cover is annular 270 degrees in the circumferential direction, is inclined 45 degrees in the axial direction, has a height of 10cm, and is provided with three bolt holes.
5. The device of claim 1, wherein the central shaft fixing nut is sized to match the diameter of the measuring point rod and is pre-positioned at one end near the reflector before the measuring point is anchored.
6. The method for using the anti-damage protection device for monitoring and measuring monitoring points in tunnel engineering according to any one of claims 1 to 5, which is characterized by comprising the following steps:
firstly, drilling holes in a wall body according to requirements, anchoring measuring points by using an anchoring agent, penetrating the drilled holes through primary lining concrete, and penetrating 20-30 cm into surrounding rock; the fixing support is provided with threads which penetrate through the reserved bolt holes of the protective cover and are fixed by support nuts, the protective device is assembled, and the LED lamps are fixed on two sides of the reserved gaps of the protective cover and used for increasing the visibility of the measuring points; one ends of the three fixing brackets, which are provided with semi-annular fixing sheets, are clamped on the monitoring rod, the middle shaft fixing nuts are used for pressing and fixing, the notch of the protective cover and the reflecting sheet face to the measuring direction, and the measuring point is measured through the notch by the total station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711482396.8A CN108072363B (en) | 2017-12-29 | 2017-12-29 | Tunnel engineering monitoring measurement point protection device and installation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711482396.8A CN108072363B (en) | 2017-12-29 | 2017-12-29 | Tunnel engineering monitoring measurement point protection device and installation method |
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| Publication Number | Publication Date |
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| CN108072363A CN108072363A (en) | 2018-05-25 |
| CN108072363B true CN108072363B (en) | 2024-03-15 |
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| CN201711482396.8A Active CN108072363B (en) | 2017-12-29 | 2017-12-29 | Tunnel engineering monitoring measurement point protection device and installation method |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109000579B (en) * | 2018-08-24 | 2023-12-29 | 中交中南工程局有限公司 | Telescopic tunnel surrounding rock displacement monitoring reflection sheet protection device |
| CN109459074A (en) * | 2018-11-13 | 2019-03-12 | 中铁十六局集团有限公司 | A kind of folding assembled monitoring device |
| CN111780855A (en) * | 2020-05-26 | 2020-10-16 | 山东大学 | Cable external-damage-prevention method and system based on fiber radial vibration source ranging vibration identification |
| CN112710287A (en) * | 2020-12-09 | 2021-04-27 | 北京中交桥宇科技有限公司 | Large-section DCD method monitoring measurement point distribution method |
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| CN108072363A (en) | 2018-05-25 |
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