CN113153378A - Open type cold-absorbing anti-melting structure of permafrost tunnel - Google Patents
Open type cold-absorbing anti-melting structure of permafrost tunnel Download PDFInfo
- Publication number
- CN113153378A CN113153378A CN202110337669.XA CN202110337669A CN113153378A CN 113153378 A CN113153378 A CN 113153378A CN 202110337669 A CN202110337669 A CN 202110337669A CN 113153378 A CN113153378 A CN 113153378A
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- Prior art keywords
- tunnel
- openable
- fixed
- insulation board
- permafrost
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Links
- 238000002844 melting Methods 0.000 title claims abstract description 25
- 238000009413 insulation Methods 0.000 claims abstract description 63
- 239000011435 rock Substances 0.000 claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 25
- 239000010959 steel Substances 0.000 claims description 25
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 4
- 238000004904 shortening Methods 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 2
- 230000007774 longterm Effects 0.000 abstract description 5
- 238000010257 thawing Methods 0.000 abstract description 5
- 238000007710 freezing Methods 0.000 description 5
- 230000008014 freezing Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000004321 preservation Methods 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 230000004087 circulation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/40—Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to an openable cold-absorbing anti-melting structure of a permafrost tunnel, which is positioned in a tunnel lining structure and comprises fixed insulation boards paved on the inner side of the tunnel lining structure, wherein annular breaks are arranged at intervals along the longitudinal direction of the tunnel on the fixed insulation boards, openable insulation boards are arranged in a break ring groove, and the openable insulation boards are uniformly distributed in the break ring groove in the annular direction. The invention can control the motor to rotate according to the real-time temperature change inside and outside the tunnel lining through the controller, thereby realizing the opening and closing of the openable insulation board. The lining can be opened in cold seasons, surrounding rocks behind the lining can be fully cooled and quickly refrozen, so that the freeze thawing cycle is reduced, and the long-term stable service of the permafrost tunnel is ensured.
Description
Technical Field
The invention relates to the field of tunnel engineering in cold regions, in particular to an openable cold-absorbing anti-melting structure of a permafrost tunnel.
Background
After the permafrost tunnel is excavated, the original heat balance state is broken, so that the permafrost surrounding rock is melted to form a melting ring. During operation, the air temperature in the tunnel changes along with seasons, so that freeze-thaw circulation of surrounding rocks is caused, and the problems of water leakage, structural frost heaving damage and the like are caused. Promoting rapid refreezing of permafrost surrounding rocks and keeping a stable freezing state are the keys of long-term stable service of permafrost tunnels.
At present, the heat exchange between air and surrounding rocks is reduced by generally laying a heat insulation layer on a tunnel lining structure at home and abroad, and the adverse effect of freeze-thaw cycle on the lining structure is reduced. The common thermal insulation layer is laid in two ways, one is laid on the surface of the tunnel secondary lining, and the other is laid between the waterproof layer and the tunnel secondary lining. Theoretically, the laying of the heat preservation and insulation layer can play an effective heat preservation and insulation effect, so that the problem of freezing and thawing cycle disasters of the permafrost tunnel is solved. Engineering practice shows that the heat-insulating layer cannot completely block heat exchange between the interior of the tunnel and surrounding rocks behind the lining. In warm seasons, the temperature of air in the tunnel is high, so that the surrounding rock is ablated to a certain degree, and in cold seasons, the surrounding rock is refrozen due to the invasion of cold air. The traditional heat preservation layer can prevent heat from invading in warm seasons, but also prevents the surrounding rock from melting and freezing in cold seasons.
Therefore, an openable type cold-absorption anti-melting structure of the permafrost tunnel is needed to solve the problems, the permafrost tunnel can achieve an effective heat-insulation effect in warm seasons, and can be opened in cold seasons, surrounding rocks behind the lining are fully cooled and quickly frozen back, the temperature is further reduced, and the warm-season normal temperature is resisted, so that the freeze-thaw cycle is reduced, and the long-term stable service of the permafrost tunnel is ensured.
Disclosure of Invention
The invention aims to provide an openable type cold-absorption anti-thawing structure of a permafrost tunnel, which can play an effective heat-insulation effect in warm seasons and can be opened in cold seasons to ensure that surrounding rocks behind a lining are fully cooled by absorption and quickly thawed back, so that the freezing and thawing cycle is reduced, and the long-term stable service of the permafrost tunnel is ensured.
The technical scheme adopted by the invention is as follows:
open-type cold absorption of permafrost tunnel prevents melting structure, its characterized in that:
the structure is located the tunnel lining structure, including laying the fixed heated board at tunnel lining structure inboard, fixed heated board is provided with the hoop disconnection along tunnel longitudinal separation, is provided with open-type heated board in the disconnection annular, and open-type heated board is in the annular of disconnection zhonghuan to evenly arranging.
The tunnel lining behind the fixed heated board is fixed with fore-and-aft rectangle steel pipe through the anchor bolt structurally, and rectangle steel pipe inboard is fixed with the hoop steel lath, and fixed heated board is fixed at the hoop steel lath inboard.
The openable insulation board is fixed on an openable insulation board supporting panel, the back of the openable insulation board supporting panel and the corresponding tunnel lining structure are both provided with fixed hinge supports, and telescopic screw sleeves are arranged between the corresponding fixed hinge supports;
the fixed hinge support at the outer side edge of the openable insulation board is fixed on the circumferential steel plate strip, and when the telescopic screw sleeve extends, the openable insulation board can be opened outwards around the fixed hinge support at the outer side.
Fireproof plates are arranged on the surfaces of the fixed insulation board and the openable insulation board.
The telescopic screw rod sleeve comprises a sleeve with threads inside and a screw rod in the sleeve, is provided with a driving motor, is connected with the screw rod through the driving motor and drives the screw rod to rotate forwards and backwards, and achieves the extension and the shortening of the telescopic screw rod sleeve.
An outer side temperature sensor is arranged in surrounding rocks behind the tunnel lining structure, and an inner side temperature sensor is arranged in the tunnel.
The inner side temperature sensor and the outer side temperature sensor are connected with the controller, the driving motor is also connected with the controller, and the controller controls the driving motor to operate according to the change of the inner temperature difference and the outer temperature difference, so that the opening and the closing of the openable insulation board are controlled.
The invention has the following advantages:
the invention can control the motor to rotate according to the real-time temperature change inside and outside the tunnel lining through the controller, thereby realizing the opening and closing of the openable insulation board. The lining can be opened in cold seasons, surrounding rocks behind the lining can be fully cooled and quickly refrozen, so that the freeze thawing cycle is reduced, and the long-term stable service of the permafrost tunnel is ensured.
Drawings
FIG. 1 is a schematic cross-sectional view (fixed insulation board portion) of an openable cold-absorbing anti-melting structure of a permafrost tunnel according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of an openable cold-absorbing anti-melting structure of a permafrost tunnel (an openable insulation board part) according to an embodiment of the invention;
FIG. 3 is a schematic diagram of an overall model of an openable cold-absorbing anti-melting structure of a permafrost tunnel according to an embodiment of the present invention;
FIG. 4 is a detailed schematic view of the cross section of a fixed insulation board of the permafrost tunnel openable cold-absorbing anti-melting structure according to the embodiment of the invention;
FIG. 5 is a detailed cross-sectional view of the insulation board of the permafrost tunnel openable cold-absorbing anti-melting structure in a closed state according to the embodiment of the invention;
FIG. 6 is a detailed view of a vertical section of the insulation board of the permafrost tunnel openable cold-absorbing anti-melting structure in a closed state according to the embodiment of the invention;
fig. 7 is a detailed longitudinal section view of the opened state of the heat insulation plate of the permafrost tunnel openable cold-absorption anti-melting structure in the embodiment of the invention.
The labels in the figure are: the tunnel lining structure comprises a tunnel lining structure 1, a rectangular steel pipe 2, a circumferential steel plate strip 3, a fixed heat-insulating plate 4, an openable heat-insulating plate 5, an openable heat-insulating plate supporting panel 6, a telescopic screw sleeve 7, a driving motor 8, a controller 9, an inner side temperature sensor 10, an outer side temperature sensor 11, a fireproof plate 12, an anchoring bolt 13, a fixed hinged support 14, air 15 and a controller 16.
Detailed Description
The present invention will be described in detail with reference to specific embodiments.
The invention relates to an openable cold-absorbing anti-melting structure of a permafrost tunnel, which is positioned in a tunnel lining structure 1 and comprises fixed insulation boards 4 paved on the inner side of the tunnel lining structure, wherein annular breaks are arranged at intervals along the longitudinal direction of the tunnel on the fixed insulation boards 4, openable insulation boards 5 are arranged in a break ring groove, and the openable insulation boards 5 are uniformly distributed in the break ring groove in the annular direction. The surfaces of the fixed insulation board 4 and the openable insulation board 5 are both provided with fireproof boards 12.
The tunnel lining structure 1 behind the fixed heat-insulating plate 4 is fixed with a longitudinal rectangular steel pipe 2 through an anchor bolt 13, the inner side of the rectangular steel pipe 2 is fixed with a circumferential steel plate strip 3, and the fixed heat-insulating plate 4 is fixed on the inner side of the circumferential steel plate strip 3.
The openable insulation board 5 is fixed on the openable insulation board support panel 6, the inner side of the openable insulation board support panel 6 on the opening side and the corresponding tunnel lining structure 1 are both provided with fixed hinge supports 14, and a telescopic screw sleeve 7 is arranged between the corresponding fixed hinge supports 14; and a fixed hinge support 14 at the outer side edge of the fixed side of the openable insulation board 5 is fixed on the circumferential steel plate strip 3. When the telescopic screw sleeve 7 extends, the openable heat-insulating plate 5 can be opened outwards around the fixed hinge support 14 on the outer side. The telescopic screw rod sleeve 7 comprises a sleeve with threads inside and a screw rod in the sleeve, is provided with a driving motor 8, is connected with the screw rod through the driving motor 8 and drives the screw rod to rotate forwards and backwards, and the extension and the shortening of the telescopic screw rod sleeve 7 are realized.
An outer side temperature sensor 11 is arranged in surrounding rock behind the tunnel lining structure 1, and an inner side temperature sensor 10 is arranged in the tunnel. The inner side temperature sensor 10 and the outer side temperature sensor 11 are connected to the controller 9, the driving motor 8 is also connected to the controller 9, and the controller 9 controls the driving motor 8 to operate according to the change of the inner temperature difference and the outer temperature difference, so that the opening and the closing of the openable insulation board 5 are controlled.
The invention is described in further detail below with reference to the accompanying drawings:
referring to the attached drawings, the open type cold-absorbing anti-melting structure of the permafrost tunnel comprises a rectangular steel pipe 2, a fixed insulation board 4, an open type insulation board 5, an open type insulation board supporting panel 6, a telescopic screw sleeve 7, a driving motor 8, a controller 9, an inner side temperature sensor 10, an outer side temperature sensor 11, a fireproof plate 12, an anchoring bolt 13 and a fixed hinge support 14, wherein the rectangular steel pipe 2 is arranged on a tunnel lining structure 1 and used for fixing a circumferential steel strip 3. On rectangular steel pipe 2 vertically is fixed in tunnel lining structure 1 through anchor bolt 13 along the tunnel, 3 interval certain distance welding of annular steel strip on rectangular steel pipe 2 simultaneously, all set up annular steel strip 3 in 4 annular breaks of fixed heated board simultaneously for consolidate open-type insulation board structure, and support the fixed hinge support 14 of the fixed side outside edge of open-type insulation board 5. Fixed heated board 4 is laid and is formed on 3 steel slats from the wall and lay, realizes 4 free circulations of air behind the heated board.
The openable insulation board 5 is laid on the openable insulation board support panel 6, the fixed side of the openable insulation board support panel 6 is fixed on the steel plate strip 3 through the fixed hinge support 14, the opened side is connected with the telescopic screw rod sleeve 7 through the fixed hinge support 14, the other end of the telescopic screw rod sleeve 7 is connected with the driving motor 8, and the telescopic screw rod sleeve can be driven by the driving motor 8 to extend or shorten. Meanwhile, the driving motor 8 is fixed to the tunnel lining structure 1 through a fixed hinge support 14. Meanwhile, the driving motor 8 is connected with the output end of the controller 9, and the input end of the controller 9 is connected with the inner side temperature sensor 10 and the outer side temperature sensor 11. The controller 9 can control the forward rotation and the reverse rotation of the motor 8 according to the temperature change of the input end, so that the extension and the shortening of the telescopic sleeve 7 are realized, and the opening and the closing of the openable insulation board 5 are realized. Meanwhile, all the surfaces of the heat insulation plates are paved with fireproof plates 12.
The specific method for controlling the switch of the open type cold-absorbing anti-melting structure of the permafrost tunnel comprises the following steps:
the method comprises the following steps: the controller 9 receives the temperature values T of the three inner temperature sensors 101、T2、T3And judging to obtain the maximum value Tmax(ii) a Sensor for simultaneously receiving three outside temperatureTemperature value T 'of 11'1、T′2、T′3And judging to obtain the minimum value T'min；
Step two: will TmaxAnd T'minMaking a comparison if Tmax＜T′minWhen the openable insulation board 5 is in a closed state, the controller 9 controls the driving motor 8 to rotate forward, so that the telescopic sleeve 7 extends, the openable insulation board 5 is opened, cold air in a hole enters the back of the insulation board, and surrounding rocks are sucked for cooling and refreezing; when the openable insulation board 5 is in an open state; no action is taken. If T is not satisfiedmax＜T′minContinuing with the next step:
step three: when the openable heat-insulation plate 5 is in a closed state, no operation is taken; when the openable insulation board 5 is in an open state; the controller 9 controls the driving motor 8 to rotate reversely, so that the telescopic sleeve 7 is shortened, the open type heat insulation plate 5 is closed, heat exchange inside and outside the tunnel lining is prevented, and the freezing stability of surrounding rocks behind the lining is kept;
step four: and repeating the first step, the second step and the third step every 10 min.
The invention is not limited to the examples, and any equivalent changes to the technical solution of the invention by a person skilled in the art after reading the description of the invention are covered by the claims of the invention.
Claims (7)
1. Open-type cold absorption of permafrost tunnel prevents melting structure, its characterized in that:
the structure is located tunnel lining structure (1), including laying fixed heated board (4) inboard at tunnel lining structure, fixed heated board (4) are provided with the hoop disconnection along tunnel longitudinal separation, are provided with open-type heated board (5) in the disconnection annular, and open-type heated board (5) are evenly arranged in the annular of disconnection zhonghuan.
2. The permafrost tunnel openable cold-suction anti-melting structure according to claim 1, wherein:
the tunnel lining structure (1) behind the fixed insulation board (4) is fixed with longitudinal rectangular steel pipes (2) through anchor bolts (13), the inner sides of the rectangular steel pipes (2) are fixed with circumferential steel plate strips (3), and the fixed insulation board (4) is fixed on the inner sides of the circumferential steel plate strips (3).
3. The permafrost tunnel openable cold-suction anti-melting structure according to claim 2, wherein:
the openable insulation board (5) is fixed on the openable insulation board supporting panel (6), the back of the openable insulation board supporting panel (6) and the corresponding tunnel lining structure (1) are respectively provided with a fixed hinge support (14), and a telescopic screw sleeve (7) is arranged between the corresponding fixed hinge supports (14);
and when the telescopic screw sleeve (7) extends, the openable insulation board (5) can be opened outwards around the fixed hinge support (14) on the outer side.
4. The permafrost tunnel openable cold-suction anti-melting structure according to claim 3, wherein:
fireproof plates (12) are arranged on the surfaces of the fixed insulation board (4) and the openable insulation board (5).
5. The permafrost tunnel openable cold-suction anti-melting structure according to claim 4, wherein:
the telescopic screw sleeve (7) comprises a sleeve with threads inside and a screw in the sleeve, is provided with a driving motor (8), is connected with the screw through the driving motor (8) and drives the screw to rotate forwards and backwards, and achieves the extension and the shortening of the telescopic screw sleeve (7).
6. The permafrost tunnel openable cold-suction anti-melting structure according to claim 5, wherein:
an outer side temperature sensor (11) is arranged in surrounding rocks behind the tunnel lining structure (1), and an inner side temperature sensor (10) is arranged in the tunnel.
7. The permafrost tunnel openable cold-suction anti-melting structure of claim 6, wherein:
the inner side temperature sensor (10) and the outer side temperature sensor (11) are connected into the controller (9), the driving motor (8) is also connected into the controller (9), and the controller (9) controls the operation of the driving motor (8) according to the change of the inner temperature difference and the outer temperature difference, so that the opening and the closing of the openable insulation board (5) are controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110337669.XA CN113153378B (en) | 2021-03-30 | 2021-03-30 | Openable cold absorbing and thawing preventing structure for permafrost tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110337669.XA CN113153378B (en) | 2021-03-30 | 2021-03-30 | Openable cold absorbing and thawing preventing structure for permafrost tunnel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113153378A true CN113153378A (en) | 2021-07-23 |
| CN113153378B CN113153378B (en) | 2024-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110337669.XA Active CN113153378B (en) | 2021-03-30 | 2021-03-30 | Openable cold absorbing and thawing preventing structure for permafrost tunnel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115110578A (en) * | 2022-07-15 | 2022-09-27 | 中铁十九局集团第三工程有限公司 | Electric control type positive accumulated temperature flow guide open cut tunnel structure for tunnel in seasonal frozen region and regulation and control method |
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| CN113153378B (en) | 2024-04-19 |
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