CN209621353U - It is a kind of for monitoring the protective device of roadway bolt stress variation - Google Patents
It is a kind of for monitoring the protective device of roadway bolt stress variation Download PDFInfo
- Publication number
- CN209621353U CN209621353U CN201920245801.2U CN201920245801U CN209621353U CN 209621353 U CN209621353 U CN 209621353U CN 201920245801 U CN201920245801 U CN 201920245801U CN 209621353 U CN209621353 U CN 209621353U
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- China
- Prior art keywords
- monitoring
- anchor pole
- free segment
- spring
- sheath
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model discloses a kind of for monitoring the protective device of roadway bolt stress variation, it include: sheath, spring and pressure gauge, external screw thread is provided on the free segment of the anchor pole, the stop collar in sheath is provided on the free segment of the anchor pole, the spring is set on the free segment of anchor pole and between fixed ring and stop collar, the pressure gauge is arranged in the medial surface of stop collar and carries out pressure monitoring to spring, sheath inner hole front end is provided with one section of internal screw thread, the protective ring with limit central spacer is provided on the internal screw thread, when free section length changes, pass through the reading difference of pressure gauge, it can be derived that the changing value of spring pressure.By the above-mentioned means, described in the utility model, for monitoring the protective device of roadway bolt stress variation, maintenance convenience, the cost used is low, simple and reliable, for the stress monitoring of anchor poles all in tunnel, promotes Roadway Safety.
Description
Technical field
The utility model relates to anchor stress monitoring technical fields, more particularly to one kind for monitoring roadway bolt stress
The protective device of variation.
Background technique
Anchorage technology based on anchor pole has obtained in the engineerings such as side slope, foundation pit, mine, tunnel and underground engineering extensively
General application.Using the anchorage technology of anchor pole, the mechanical characteristic of country rock can be changed, preferable supporting effect is obtained, bring
Traditional support pattern incomparable technology and economic benefit, meanwhile, the anchorage technology of anchor pole also receives in well lane engineering
Universal attention, and obtained quick development and be widely applied.
Different from side slope anchor pole, during mining mineral resource, Deep Roadway is in high-ground stress environment, and crustal stress is released
After putting, tunnel surrounding rock body can generate moderate finite deformation, and roadway bolt will receive the metamorphosis of rock mass generation after crustal stress release.
If surrouding rock deformation is excessive, higher tensile stress is generated inside anchor pole, this stress once exceeds the ultimate bearing capacity of anchor pole,
Anchor pole destroys, and unstable phenomenon will occur for the country rock constrained.Therefore, the stress variation of real-time monitoring anchor pole is steady to country rock
Fixed, tunnel safety has very important significance.
Since the anchoring of anchor pole has the concealment of height, in the inside of rock mass, this brings bolt action to test job
Very big difficulty, discovery quality problems are difficult, and accident treatment is more difficult.There are two types of forms for currently used monitoring means:
1, directly anchor pole bearing capacity is monitored: bolt stress meter is set at anchor rod anchored end, pressure gauge is same with anchor pole
When construct, be placed on inside rock mass, the stress of anchor pole understood by real-time monitoring to pressure gauge, this method no doubt can be real
Now to the direct monitoring of rockbolt stress, but the working environment of pressure gauge is more severe, often in moist, the temperature difference is larger
Environment, these factors not only affect the accuracy of dynamometer, while also impacting to the durability of dynamometer, it is difficult to hold
Continuous steady operation can not be replaced, be repaired once pressure gauge failure is permanent damages；
2, it monitors the stress of termination point of anchor rod: by welding relevant device, realizing the load-bearing monitor to free section, it is this
For method due to individually to increase relevant device, construction is cumbersome, involves great expense, and space is limited in mine working, increased to set
The standby use space for reducing tunnel, needs to improve.
Utility model content
The utility model is mainly solving the technical problems that provide a kind of for monitoring the protection of roadway bolt stress variation
Device carries out the real-time monitoring of roadway bolt stress variation, lifting construction, maintenance convenience and security protection effect.
In order to solve the above technical problems, the technical solution that the utility model uses is: providing a kind of for monitoring lane
The protective device of road anchor stress variation, comprising: sheath, spring and pressure gauge are provided with outer spiral shell on the free segment of the anchor pole
Line, the sheath are embedded in tunnel inner wall and are concentrically located on the outside of the free segment of anchor pole, and bore end is provided with and oneself in the sheath
Fixed ring with section is provided with the stop collar in sheath on the free segment of the anchor pole, and the spring is set in anchor
On the free segment of bar and between fixed ring and stop collar, the pressure gauge medial surface of stop collar is set and to spring into
Row pressure monitoring, sheath inner hole front end are provided with one section of internal screw thread, are provided on the internal screw thread and limit central spacer
Protective ring.
In one preferred embodiment of the utility model, it is provided in the fixed ring and stop collar corresponding with external screw thread
Threaded hole.
In one preferred embodiment of the utility model, it is provided on the free segment of the anchor pole positioned at spring and pressure gauge
Between gasket.
In one preferred embodiment of the utility model, the free segment outer circle that the protective ring diameter of bore is greater than anchor pole is straight
Diameter.
In one preferred embodiment of the utility model, threading hole corresponding with pressure gauge is provided on the stop collar.
In one preferred embodiment of the utility model, it is provided on the free segment of the anchor pole positioned at tunnel inner wall outside
Support plate and fastening nut.
The beneficial effects of the utility model are: the utility model point out it is a kind of for monitoring roadway bolt stress variation
Protective device is constructed easier, compact-sized, is not take up lane space, sheath is strengthened to pressure gauge and free section
Protection, avoid the problem of pressure gauge is damaged by environmental factor, extend the service life of device, and safeguard and more
Change relatively convenient, the cost used is low, simple and reliable, can stress monitoring with coupled computer for all anchor poles in tunnel,
Serious accident is avoided, Roadway Safety is promoted.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model
Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings, in which:
Fig. 1 is that the utility model is a kind of for monitoring the knot of one preferred embodiment of protective device of roadway bolt stress variation
Structure schematic diagram.
Specific embodiment
Below by the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described
Embodiment is only a part of the embodiment of the utility model, instead of all the embodiments.Based on the implementation in the utility model
Example, all other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The range of the utility model protection.
Referring to Fig. 1, the utility model embodiment includes:
The protective device for being used to monitor roadway bolt stress variation as shown in Figure 1, comprising: sheath 2, spring 3 and pressure
4 are counted, external screw thread 5 is provided on the free segment of the anchor pole 1, is provided in tunnel on the free segment end of the anchor pole 1
Support plate 10 and fastening nut 11 on the outside of wall are supported the fixation of plate 10 and the stretching of anchor pole 1 using fastening nut 11.
The sheath 2 is embedded in tunnel inner wall and is concentrically located on the outside of the free segment of anchor pole 1, strengthens to 1 free segment of anchor pole
Protection, bore end is provided with the fixed ring 6 with free segment cooperation in the sheath 2, is provided with and outer spiral shell in the fixed ring 6
The corresponding threaded hole of line facilitates the rotation of sheath 2 to install.
As shown in Figure 1, the stop collar 8 in sheath 2 is provided on the free segment of the anchor pole 1, in the stop collar 8
It is provided with threaded hole corresponding with external screw thread, rotation installation is more convenient.The spring 3 is set on the free segment of anchor pole 1 simultaneously
Between fixed ring 6 and stop collar 8, the pressure gauge 4 is arranged in the medial surface of stop collar 8 and carries out pressure prison to spring
It surveys, the gasket 7 being provided between spring 3 and pressure gauge 4 on the free segment of the anchor pole 1, gasket 7 makes pressure gauge 4
Stress more evenly, promotes 3 pressure monitoring data precision of spring.
Pressure gauge 4 is located in sheath 2, and sheath 2 reduces adverse effect of the environment to pressure gauge 4, before 2 inner hole of sheath
End is provided with one section of internal screw thread, is threadedly coupled the protective ring 9 for being provided with and being spaced with stop collar 8 on the internal screw thread.The protection
9 diameter of bore of ring is greater than the free segment outside diameter of anchor pole 1, and in a certain range, protective ring 9 does not influence the free segment length of anchor pole 1
Degree variation, still, when the free segment elongation of anchor pole 1 is excessive, protective ring 9 contacts with stop collar 8 and avoids 1 free segment of anchor pole
Continue the problem of extending and being broken.
Threading hole corresponding with pressure gauge 4 is provided on the stop collar 8, the route of pressure gauge 4 passes through on stop collar 8
Threading hole export, does not destroy the structure of sheath 2, convenient construction.
A method of for monitoring roadway bolt stress variation, comprising the following steps:
(1) it is deep to be fixed on tunnel inner wall using cementing operations by the anchoring section construction for carrying out anchor pole 1 for the anchoring section of anchor pole 1
Place；
(2) after anchoring section construction, by 2 rotary sleeve of sheath on the free segment of anchor pole 1, it is put into spring inside sheath 2,
And making anchor pole 1 through spring 3, spring 3 uses helical spring, utilizes the guiding of the progress spring 3 of anchor pole 1；
(3) gasket 7 is installed in 3 end of spring, installs pressure gauge 4 on the outside of gasket 7, then rotates installation stop collar 8 again, realizes
The limit of pressure gauge 4 and the precommpression of spring 3 install protective ring 9, protective ring and stop collar after stop collar installation in sheath
Certain gap is kept, when the free segment of anchor pole 1 is extended to a certain extent, protective ring 9 is contacted with stop collar 8, utilizes protective ring 9
The elongation for carrying out stop collar 8 limits in order to avoid breaking, and improves design margin evaluation；
(4) in tunnel, inner wall outside is positioned at the support plate 10 of 1 end of anchor pole, and is revolved using fastening nut 11
Tightly, so that anchor pole 1 reaches design bearing capacity, the compressive deformation that spring 3 generates makes pressure gauge 4 generate reading, pressure gauge 4 is led to
The external computer of route is crossed, to pressure count according to being read out, the stress that a computer can monitor several anchor poles 1 simultaneously becomes
Change, reduces the cost of production；
(5) when the rock mass of tunnel inner wall expands deformation, stretching action is generated to anchor pole 1, the tensile stress of anchor pole increases,
Free section generates elongation, and then spring 3 extends, and the pressure that spring 3 generates becomes smaller, and pressure gauge reading becomes smaller, according to elongation
Pressure gauge when installing afterwards with initial anchor pole reads difference, can be derived that the changing value of spring pressure, according to Hooke's law,
The strain of spring is found out, this strain is the strain of free segment anchor pole, further according to the stress of anchor pole, the relationship of strain, Ji Keqiu
The stress increment of anchor pole out is realized conversely, using above-mentioned principle, can equally acquire the stress variation of anchor pole if rock mass is shunk
The dynamic monitoring of anchor stress, high sensitivity are at low cost.
In conclusion the utility model point out it is a kind of for monitoring the protective device of roadway bolt stress variation, volume
Small and exquisite, convenient construction, durability is good, by indirect monitoring rock mass deformation, is translated into bolt deformation, thus according to anchor pole
Stress strain curve is realized to the stress monitoring of anchor pole, is conducive to anchor pole of finding the problem in time, promoted tunnel using safe
Property.
The above description is only the embodiments of the present invention, and therefore it does not limit the scope of the patent of the utility model, all
Using equivalent structure or equivalent flow shift made by the utility model description, it is applied directly or indirectly in other phases
The technical field of pass, is also included in the patent protection scope of the utility model.
Claims (6)
1. a kind of for monitoring the protective device of roadway bolt stress variation, the stress monitoring and safety for anchor pole in tunnel are anti-
Shield, the anchor pole include the free segment positioned at the anchoring section of tunnel inner wall depths and positioned at tunnel inner wall superficial, which is characterized in that
Include: sheath, spring and pressure gauge, be provided with external screw thread on the free segment of the anchor pole, the sheath be embedded in tunnel inner wall and
It is concentrically located on the outside of the free segment of anchor pole, bore end is provided with the fixed ring with free segment cooperation, the anchor pole in the sheath
Free segment on be provided with the stop collar in sheath, the spring be set on the free segment of anchor pole and be located at fixed ring with
Between stop collar, the pressure gauge is arranged in the medial surface of stop collar and carries out pressure monitoring to spring, before the sheath inner hole
End is provided with one section of internal screw thread, and the protective ring with limit central spacer is provided on the internal screw thread.
2. according to claim 1 for monitoring the protective device of roadway bolt stress variation, which is characterized in that described solid
Determine to be provided with threaded hole corresponding with external screw thread in ring and stop collar.
3. according to claim 1 for monitoring the protective device of roadway bolt stress variation, which is characterized in that the anchor
The gasket being provided on the free segment of bar between spring and pressure gauge.
4. according to claim 1 for monitoring the protective device of roadway bolt stress variation, which is characterized in that described anti-
Retaining ring diameter of bore is greater than the free segment outside diameter of anchor pole.
5. according to claim 1 for monitoring the protective device of roadway bolt stress variation, which is characterized in that the limit
Threading hole corresponding with pressure gauge is provided on the ring of position.
6. according to claim 1 for monitoring the protective device of roadway bolt stress variation, which is characterized in that the anchor
The support plate and fastening nut positioned at tunnel inner wall outside are provided on the free segment of bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920245801.2U CN209621353U (en) | 2019-02-27 | 2019-02-27 | It is a kind of for monitoring the protective device of roadway bolt stress variation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920245801.2U CN209621353U (en) | 2019-02-27 | 2019-02-27 | It is a kind of for monitoring the protective device of roadway bolt stress variation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209621353U true CN209621353U (en) | 2019-11-12 |
Family
ID=68454866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920245801.2U Expired - Fee Related CN209621353U (en) | 2019-02-27 | 2019-02-27 | It is a kind of for monitoring the protective device of roadway bolt stress variation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209621353U (en) |
-
2019
- 2019-02-27 CN CN201920245801.2U patent/CN209621353U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191112 Termination date: 20210227 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |