CN206299391U - A kind of underground engineering concrete spray coating pressure monitoring structure - Google Patents
A kind of underground engineering concrete spray coating pressure monitoring structure Download PDFInfo
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- CN206299391U CN206299391U CN201621290710.3U CN201621290710U CN206299391U CN 206299391 U CN206299391 U CN 206299391U CN 201621290710 U CN201621290710 U CN 201621290710U CN 206299391 U CN206299391 U CN 206299391U
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- spray coating
- concrete spray
- underground engineering
- concrete
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Abstract
The utility model is related to a kind of underground engineering concrete spray coating pressure monitoring structure.The purpose of this utility model is to provide a kind of underground engineering concrete spray coating pressure monitoring structure, and design considerations is provided the purpose is to the thickness for on-site concrete spray-up and spray-up pressure, and waste of material is reduced under the preceding dike for ensureing engineering safety.The technical solution of the utility model is：A kind of underground engineering concrete spray coating pressure monitoring structure, its concrete spray coating combined bolting and shotcrete is on the scar of country rock, it is characterized in that arranging several monitoring sections in the essentially identical hole section of wall rock condition, pressure cell is installed between the concrete spray coating and scar on each monitoring section, and perpendicular to the pre-buried chaining pin with a scale in scar direction.The utility model is applied to underground engineering field.
Description
Technical field
The utility model is related to a kind of underground engineering concrete spray coating pressure monitoring structure.Suitable for underground engineering field.
Background technology
Combined bolting and shotcrete is especially new Austrian in company with modern design of its support principle since the fifties in last century comes out
The progress of method for tunnel construction, widely should in underground engineering fields such as mine all over the world, building, railway, water conservancy project and military projects
With.
Why more superior than traditional supporting combined bolting and shotcrete is, mainly due to combined bolting and shotcrete in technologic feature so that it
The self-bearing ability of country rock and the bearing capacity of support material can be given full play to, modern supporting construction principle is adapted to and supporting is wanted
Ask.
Combined bolting and shotcrete belongs to flexible support, easily adjusts surrouding rock deformation, plays self.Although pneumatically placed concrete sheet
Body belongs to fragile material, but due to technologic reason, it can accomplish to spray very thin, but also can gradation spray-up method
Further play the flexibility of spray-up.Further, since spray-up is flexible big and is closely pasted with country rock, thus spray-up be mainly compression or
Break it is bad, it than by traditional supporting of curved destruction be more difficult to play concrete bearing capacity.Meanwhile, constructed using gradation spray-up,
Can play a part of to improve bearing capacity.Therefore combined bolting and shotcrete has the effect of regulation and control surrouding rock deformation more more preferable than traditional supporting.
Except it is upper it is described in addition to, spray-up also has the palisades for loosening is bonded together and filled and led up the effect of crack depression, thus energy
Reduce wall rock loosening and stress concentration.Meanwhile, spray-up is again the material of a kind of good water proof and efflorescence prevention, can in time close and enclose
Rock, although traditional supporting also has this characteristic, because pneumatically placed concrete is applied in time, thus it is to expansion, deliquescence, weathering, erosion
Become rock mass has more preferable waterproof, efflorescence prevention effect than traditional supporting.
Anti-cut effect, the effect of closing flexible shell are bonded because the mechanism of action of spray-up concrete support country rock is mainly top layer
Acted on surface counter-force, therefore, certain jetting thickness is needed during using concrete spraying support, could so form one
Closed arc shell with bearing capacity and with certain bonding and anti-shear ability.But at present, for concrete thickness
Determination depend on engineering experience, without calculating accordingly and measuring method, the determination for spray-up pressure also lacks phase
The technological means answered.
The content of the invention
The technical problems to be solved in the utility model is：A kind of underground engineering concrete spray coating pressure monitoring structure is provided,
Design considerations is provided the purpose is to the thickness for on-site concrete spray-up and spray-up pressure, is subtracted under the preceding dike for ensureing engineering safety
Few waste of material.
The technical scheme that the utility model is used is：A kind of underground engineering concrete spray coating pressure monitoring structure, it is mixed
Solidifying soil spray-up combined bolting and shotcrete is on the scar of country rock, it is characterised in that arrange several prisons in the essentially identical hole section of wall rock condition
Section is surveyed, pressure cell is installed between the concrete spray coating and scar on each monitoring section, and pre- perpendicular to scar direction
The chaining pin of buried strap scale.
The thickness of the concrete spray coating on the monitoring section is between 5~20cm scopes.
The type of the concrete spray coating on the monitoring section includes steel fiber reinforced concrete, nano-concrete or imitative steel fibre
Concrete.
The length of each monitoring section is 1 Bei Dong footpaths, and the distance between two neighboring monitoring section is also 1 Bei Dong footpaths.
Bonded using epoxies binding agent between the pressure cell and chaining pin and scar and installed.
The beneficial effects of the utility model are：Concrete spray coating is the important component in underground engineering combined bolting and shotcrete,
The features such as with the conformability of supporting promptness, flexibility, country rock and supporting, closure, construction flexibility, enclosed so as to give full play to
The carrying effect of the self-supporting and material of rock.The monitoring of structures that the utility model is provided can be realized to the effective of spray-up pressure
Monitoring, technology is simple, and scene is easy to promote, and can provide design considerations for the determination of on-site concrete jetting thickness.
Brief description of the drawings
Fig. 1 is mounting structure schematic diagram of the present utility model.
Specific embodiment
As shown in figure 1, the present embodiment underground engineering concrete spray coating pressure monitoring structure is arranged on the scar 1 of country rock.
During implementation, several monitoring sections can be arranged in the essentially identical hole section of wall rock condition, in order to determine concrete spray coating 2 and rock
Pressure between face 1, installs (or the compression of pressure cell 3 between the concrete spray coating 2 and scar 1 of each monitoring section
Box), and perpendicular to the pre-buried chaining pin 4 with a scale in the direction of scar 1.
The thickness of the concrete spray coating 2 on two neighboring monitoring section can be advised with difference depending on tunnel geological conditions and cavern
Depending on mould, the thickness of usual concrete spray coating 2 is selected in the range of 5~20cm, such as 5cm, 10cm, 15cm.Additionally, concrete sprays
The type of layer 2 also may be selected different type, such as steel fiber reinforced concrete, nano-concrete or imitative steel fiber reinforced concrete etc., to comment
The pressure that valency different-thickness, different type concrete spray coating are produced.
The length of the monitoring section of the tested upper different jetting thicknesses of hole section is about 1 Bei Dong footpaths, two neighboring monitoring section
The distance between also about 1 Bei Dong footpaths.Primary condition the purpose is on the one hand ensure each monitoring section is essentially identical, another
Aspect is to eliminate the influence that jetting thickness change is likely to result in adjacent test section.
The pressure cell 3 and chaining pin 4 should be noted that the selection of alite paste between instrument and scar 1 when installing, it is not recommended that choosing
With cement mortar or cement mortar, this bonding mode obtains the time-consuming of intensity may not meet requirement, and recommendation uses epoxies
Binding agent bonds installation, to ensure quickly enter stable state after instrument installation, possesses detection requirement.
Finally, encryption observation, the encryption during particularly hereafter face is pushed ahead are needed after installation is complete
Observation, understands influence of the face arching to spray-up supporting effect.
Claims (5)
1. a kind of underground engineering concrete spray coating pressure monitoring structure, the concrete spray coating combined bolting and shotcrete is in the scar of country rock
(1) on, it is characterised in that：Several monitoring sections are arranged in the essentially identical hole section of wall rock condition, on each monitoring section
Pressure cell (3) is installed between concrete spray coating (2) and scar (1), and perpendicular to the pre-buried survey with a scale in scar (1) direction
Pin (4).
2. underground engineering concrete spray coating pressure monitoring structure according to claim 1, it is characterised in that：The monitoring is disconnected
The thickness of the concrete spray coating (2) on face is between 5~20cm scopes.
3. underground engineering concrete spray coating pressure monitoring structure according to claim 2, it is characterised in that：The monitoring is disconnected
The type of the concrete spray coating (2) on face includes steel fiber reinforced concrete, nano-concrete or imitative steel fiber reinforced concrete.
4. underground engineering concrete spray coating pressure monitoring structure according to claim 1, it is characterised in that：Each monitoring is disconnected
The length in face is 1 Bei Dong footpaths, and the distance between two neighboring monitoring section is also 1 Bei Dong footpaths.
5. underground engineering concrete spray coating pressure monitoring structure according to claim 1, it is characterised in that：The compression
Bonded using epoxies binding agent between meter (3) and chaining pin (4) and scar (1) and installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621290710.3U CN206299391U (en) | 2016-11-29 | 2016-11-29 | A kind of underground engineering concrete spray coating pressure monitoring structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621290710.3U CN206299391U (en) | 2016-11-29 | 2016-11-29 | A kind of underground engineering concrete spray coating pressure monitoring structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206299391U true CN206299391U (en) | 2017-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621290710.3U Active CN206299391U (en) | 2016-11-29 | 2016-11-29 | A kind of underground engineering concrete spray coating pressure monitoring structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108414125A (en) * | 2017-12-28 | 2018-08-17 | 天地科技股份有限公司 | A kind of measuring system and method for underworkings concrete spray coating internal stress |
-
2016
- 2016-11-29 CN CN201621290710.3U patent/CN206299391U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108414125A (en) * | 2017-12-28 | 2018-08-17 | 天地科技股份有限公司 | A kind of measuring system and method for underworkings concrete spray coating internal stress |
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