CN113153378B - Openable cold absorbing and thawing preventing structure for permafrost tunnel - Google Patents
Openable cold absorbing and thawing preventing structure for permafrost tunnel Download PDFInfo
- Publication number
- CN113153378B CN113153378B CN202110337669.XA CN202110337669A CN113153378B CN 113153378 B CN113153378 B CN 113153378B CN 202110337669 A CN202110337669 A CN 202110337669A CN 113153378 B CN113153378 B CN 113153378B
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- tunnel
- openable
- fixed
- thawing
- heat
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- 238000010257 thawing Methods 0.000 title claims abstract description 31
- 238000009413 insulation Methods 0.000 claims abstract description 31
- 238000004321 preservation Methods 0.000 claims abstract description 31
- 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
- 239000002689 soil Substances 0.000 claims description 2
- 230000008014 freezing Effects 0.000 abstract description 8
- 238000007710 freezing Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009545 invasion Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000009466 transformation 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
Classifications
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- 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
Landscapes
- 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 and thawing preventing structure of a permafrost tunnel, which is positioned in a tunnel lining structure and comprises fixed heat insulation plates paved on the inner side of the tunnel lining structure, wherein the fixed heat insulation plates are longitudinally and alternately provided with annular breaks along the tunnel, openable heat insulation plates are arranged in break ring grooves, and the openable heat insulation plates are uniformly distributed in the annular breaks. According to the invention, the motor can be controlled to rotate by the controller according to the real-time temperature change inside and outside the tunnel lining, so that the openable insulation board can be opened and closed. The tunnel can play an effective heat preservation and insulation effect when the air temperature in the tunnel is high in warm seasons, and can be opened in cold seasons, so that surrounding rocks behind the lining fully absorb cold and quickly return to the cold, thereby reducing the freezing and thawing cycle and ensuring the long-term stable service of the permafrost tunnel.
Description
Technical Field
The invention relates to the field of tunnel engineering in cold areas, in particular to an openable cold absorbing and thawing preventing structure of a permafrost tunnel.
Background
After the permafrost tunnel is excavated, the original thermal balance state is broken, so that the permafrost surrounding rock is melted, and a melting ring is formed. During operation, the temperature in the tunnel can change along with seasons, so that the freeze thawing cycle of surrounding rock is caused, and the problems of water leakage, structural frost heaving damage and the like are caused. Promoting the rapid freezing back of surrounding rock of permafrost and keeping a stable freezing state is a key of long-term stable service of permafrost tunnels.
At present, a mode of paving a heat preservation and insulation layer on a tunnel lining structure is generally adopted at home and abroad to reduce heat exchange between air and surrounding rock and reduce adverse effects of freeze thawing cycle on the lining structure. The common heat preservation and insulation layer is laid on the surface of the secondary lining of the tunnel in two modes, one is laid between the waterproof layer and the secondary lining of the tunnel in the other mode. In theory, the laying of the heat preservation and heat insulation layer can play an effective role in heat preservation and heat insulation, so that the problem of freeze thawing cycle disasters of permafrost tunnels is solved. However, engineering practice shows that the heat preservation and insulation layer can not completely block heat exchange between the inside of the tunnel and surrounding rock behind the lining. In warm seasons, the surrounding rock is ablated to a certain extent due to the high air temperature in the holes, and in cold seasons, the surrounding rock is promoted to be refreezed due to invasion of cold air. The traditional heat preservation setting can block invasion of heat when warm season, but also has prevented thawing the back freezing of country rock at the same time when cold season.
Therefore, an openable cold absorbing and thawing preventing structure for a permafrost tunnel is needed to solve the problems, not only can have an effective heat preservation and insulation effect in warm seasons, but also can be opened in cold seasons, so that surrounding rocks behind a lining can fully absorb cold and quickly freeze back, and meanwhile, the temperature is further reduced and the temperature is resisted Ji Zhengwen, thereby alleviating the freezing and thawing cycle and ensuring the permafrost tunnel to be stably in service for a long time.
Disclosure of Invention
The invention aims to provide an openable cold absorbing and thawing preventing structure of a permafrost tunnel, which not only can play an effective heat preservation and insulation role in warm seasons, but also can be opened in cold seasons, so that surrounding rocks behind a lining are fully absorbed and frozen back quickly, thereby reducing the freezing and thawing cycle and ensuring the permafrost tunnel to be stably in service for a long time.
The technical scheme adopted by the invention is as follows: the utility model provides a but freeze soil tunnel open-type inhale cold structure of preventing thawing which characterized in that: the structure is located in the tunnel lining structure, and comprises fixed heat-insulating plates paved on the inner side of the tunnel lining structure, wherein the fixed heat-insulating plates are circumferentially disconnected at intervals along the longitudinal direction of a tunnel, openable heat-insulating plates are arranged in disconnected annular grooves, and the openable heat-insulating plates are circumferentially and uniformly distributed in the disconnected annular grooves.
A longitudinal rectangular steel pipe is fixed on the tunnel lining structure behind the fixed heat-insulating plate through an anchor bolt, a circumferential steel plate strip is fixed on the inner side of the rectangular steel pipe, and the fixed heat-insulating plate is fixed on the inner side of the circumferential steel plate strip.
The openable heat preservation plate is fixed on the openable heat preservation plate support panel, the back surface of the openable heat preservation plate support 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 heat-insulating plate is fixed on the annular steel plate strip, and when the telescopic screw sleeve stretches, the openable heat-insulating plate can be outwards opened around the fixed hinge support at the outer side.
The surfaces of the fixed heat-insulating plate and the openable heat-insulating plate are provided with fireproof plates.
The telescopic screw sleeve comprises a sleeve with threads inside and a screw rod in the sleeve, and is provided with a driving motor, wherein the driving motor is connected with the screw rod and drives the screw rod to rotate forwards and reversely, so that the telescopic screw sleeve is lengthened and shortened.
An outside temperature sensor is arranged in surrounding rock behind the tunnel lining structure, and an inside temperature sensor is arranged in the tunnel.
The inside temperature sensor and the outside temperature sensor are connected to the controller, the driving motor is also connected to the controller, and the controller controls the driving motor to operate according to the change of the temperature difference between the inside and the outside, so that the openable heat insulation board is controlled to be opened and closed.
The invention has the following advantages: according to the invention, the motor can be controlled to rotate by the controller according to the real-time temperature change inside and outside the tunnel lining, so that the openable insulation board can be opened and closed. The tunnel can play an effective heat preservation and insulation effect when the air temperature in the tunnel is high in warm seasons, and can be opened in cold seasons, so that surrounding rocks behind the lining fully absorb cold and quickly return to the cold, thereby reducing the freezing and thawing cycle and ensuring the long-term stable service of the permafrost tunnel.
Drawings
FIG. 1 is a schematic cross-sectional view of an openable cold absorbing and thawing preventing structure (a fixed insulation board part) 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 and thawing preventing structure (openable heat-insulating plate part) of a permafrost tunnel according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an overall model of an openable cold absorbing and thawing preventing structure of a permafrost tunnel according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a cross section detail of a fixed insulation board of an openable cold absorbing and thawing preventing structure of a permafrost tunnel according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional detail view of a closed state of an insulation board of an openable cold absorbing and thawing preventing structure of a permafrost tunnel according to an embodiment of the present invention;
FIG. 6 is a schematic view of a longitudinal section detail of a closed state of an insulation board of an openable cold absorbing and thawing preventing structure of a permafrost tunnel according to an embodiment of the present invention;
Fig. 7 is a schematic view of a vertical section detail of an opened state of an insulation board of an openable cold absorbing and thawing preventing structure of a permafrost tunnel according to an embodiment of the present invention.
The marks in the figure are as follows: the tunnel lining structure 1, a rectangular steel pipe 2, a circumferential steel strip 3, a fixed heat-insulating plate 4, an openable heat-insulating plate 5, an openable heat-insulating plate support 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 anchor bolt 13, a fixed hinge support 14 and air 15.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
The invention relates to an openable cold absorbing and thawing preventing structure of a permafrost tunnel, which is positioned in a tunnel lining structure 1 and comprises fixed heat insulation plates 4 paved on the inner side of the tunnel lining structure, wherein the fixed heat insulation plates 4 are longitudinally and alternately provided with annular breaks along the tunnel, openable heat insulation plates 5 are arranged in break ring grooves, and the openable heat insulation plates 5 are uniformly distributed in the break ring grooves in the annular directions. The surfaces of the fixed heat-insulating plate 4 and the openable heat-insulating plate 5 are provided with fireproof plates 12.
The tunnel lining structure 1 behind the fixed heat insulation plate 4 is fixedly provided with a longitudinal rectangular steel pipe 2 through an anchor bolt 13, the inner side of the rectangular steel pipe 2 is fixedly provided with a circumferential steel plate strip 3, and the fixed heat insulation plate 4 is fixedly arranged on the inner side of the circumferential steel plate strip 3.
The openable heat preservation plate 5 is fixed on the openable heat preservation plate support panel 6, the inner side of the opening side of the openable heat preservation plate support panel 6 and the corresponding tunnel lining structure 1 are both provided with fixed hinge supports 14, and telescopic screw sleeves 7 are arranged between the corresponding fixed hinge supports 14; the fixed hinge support 14 of the outer side edge of the fixed side of the openable heat preservation plate 5 is fixed on the annular steel lath 3. When the telescopic screw sleeve 7 is extended, the openable heat-insulating plate 5 can be opened outwards around the outer fixed hinge support 14. The telescopic screw sleeve 7 comprises a sleeve with threads inside and a screw rod in the sleeve, a driving motor 8 is configured, and the driving motor 8 is connected with the screw rod and drives the screw rod to rotate forwards and reversely, so that the telescopic screw sleeve 7 can be lengthened and shortened.
An outside temperature sensor 11 is arranged in surrounding rock behind the tunnel lining structure 1, and an inside temperature sensor 10 is arranged in the tunnel. The inside temperature sensor 10 and the outside 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 operation of the driving motor 8 according to the change of the temperature difference between the inside and the outside, so as to control the opening and closing of the openable heat insulation board 5.
The invention is described in further detail below with reference to the accompanying drawings: referring to the drawings, the openable cold absorbing and thawing preventing structure of the permafrost tunnel comprises a rectangular steel pipe 2 which is arranged on a tunnel lining structure 1 and used for fixing a circumferential steel plate strip 3, a fixed heat-insulating plate 4, an openable heat-insulating plate 5, an openable heat-insulating plate support 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 anchor bolt 13 and a fixed hinge support 14. Rectangular steel pipe 2 is fixed in tunnel lining structure 1 along tunnel longitudinal direction through anchor bolt 13, and annular steel plate strip 3 interval welding is on rectangular steel pipe 2 simultaneously, all sets up annular steel plate strip 3 in fixed heated board 4 hoop disconnection department simultaneously for consolidate open-type heated board structure, and support open-type heated board 5 fixed side outside edge's fixed hinge support 14. The fixed heat-insulating plate 4 is paved on the steel plate strip 3 to form wall-separating paving, so that the free circulation of air behind the heat-insulating plate 4 is realized.
The openable heat preservation board 5 is laid on the openable heat preservation board support panel 6, the fixed side of the openable heat preservation board support panel 6 is fixed on the steel lath 3 through the fixed hinge support 14, the open side is connected with the telescopic screw sleeve 7 through the fixed hinge support 14, the other end of the telescopic screw sleeve 7 is connected with the driving motor 8, and the telescopic screw sleeve can be driven to extend or shorten by the driving motor 8. Meanwhile, the driving motor 8 is fixed to the tunnel lining structure 1 through the 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 driving motor 8 according to the temperature change of the input end, so as to realize the extension and the shortening of the telescopic screw sleeve 7, thereby realizing the opening and the closing of the openable heat insulation board 5. At the same time, fire protection plates 12 are laid on the surfaces of all the heat preservation plates.
The specific switch control method for the openable cold absorbing and thawing preventing structure of the permafrost tunnel comprises the following steps:
Step one: the controller 9 receives the temperature values T 1、T2、T3 of the three inner side temperature sensors 10 and judges the maximum value T max; simultaneously receiving temperature values T '1、T′2、T′3 of the three outside temperature sensors 11, and judging to obtain a minimum value T' min;
Step two: comparing T max with T' min, if T max＜T′min, when the openable heat-insulating board 5 is in a closed state, the controller 9 controls the driving motor 8 to rotate positively to extend the telescopic screw sleeve 7, the openable heat-insulating board 5 is opened, and after cold air in a hole enters the back of the heat-insulating board, surrounding rocks are sucked and frozen back; when the openable heat preservation plate 5 is in an open state; no action is taken. If T max＜T′min is not satisfied, continuing the following steps:
step three: when the openable heat preservation plate 5 is in the closed state, no operation is taken; when the openable heat preservation plate 5 is in an open state; the controller 9 controls the driving motor 8 to rotate reversely, so that the telescopic screw sleeve 7 is shortened, the open type heat insulation board 5 is closed, heat exchange between the inside and outside of the tunnel lining is prevented, and freezing stability of surrounding rock behind the lining is maintained;
Step four: repeating the first, second and third steps every 10 min.
The content of the invention is not limited to the examples listed, and any equivalent transformation to the technical solution of the invention that a person skilled in the art can take on by reading the description of the invention is covered by the claims of the invention.
Claims (5)
1. The utility model provides a but freeze soil tunnel open-type inhale cold structure of preventing thawing which characterized in that:
The permafrost tunnel openable cold absorbing and thawing preventing structure is positioned in a tunnel lining structure (1) and comprises fixed heat preservation plates (4) paved on the inner side of the tunnel lining structure, the fixed heat preservation plates (4) are longitudinally and alternately provided with annular breaks along the tunnel, openable heat preservation plates (5) are arranged in break ring grooves, and the openable heat preservation plates (5) are uniformly distributed in the annular breaks;
A longitudinal rectangular steel pipe (2) is fixed on the tunnel lining structure (1) behind the fixed heat-insulating plate (4) through an anchor bolt (13), a circumferential steel plate strip (3) is fixed on the inner side of the rectangular steel pipe (2), and the fixed heat-insulating plate (4) is fixed on the inner side of the circumferential steel plate strip (3);
The openable heat preservation plate (5) is fixed on the openable heat preservation plate support panel (6), the back surface of the openable heat preservation plate support panel (6) and the corresponding tunnel lining structure (1) are both provided with fixed hinge supports (14), and telescopic screw sleeves (7) are arranged between the corresponding fixed hinge supports (14);
the fixed hinge support (14) at the outer side edge of the openable heat-insulating plate (5) is fixed on the annular steel plate strip (3), and when the telescopic screw sleeve (7) stretches, the openable heat-insulating plate (5) can be outwards opened around the fixed hinge support (14) at the outer side.
2. The permafrost tunnel openable cold absorbing and thawing structure according to claim 1, wherein:
the surfaces of the fixed heat-insulating plate (4) and the openable heat-insulating plate (5) are provided with fireproof plates (12).
3. The open type cold absorbing and thawing preventing structure for a permafrost tunnel according to claim 2, wherein:
The telescopic screw sleeve (7) comprises a sleeve with threads inside and a screw rod in the sleeve, a driving motor (8) is arranged, and the driving motor (8) is connected with the screw rod and drives the screw rod to rotate forwards and reversely, so that the telescopic screw sleeve (7) is lengthened and shortened.
4. The permafrost tunnel openable cold absorbing and thawing structure according to claim 3, wherein:
an outside temperature sensor (11) is arranged in surrounding rock behind the tunnel lining structure (1), and an inside temperature sensor (10) is arranged in the tunnel.
5. The permafrost tunnel openable cold absorbing and thawing structure according to claim 4, wherein:
The inside temperature sensor (10) and the outside 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 internal-external temperature difference change, so that the openable heat insulation board (5) is controlled to be opened and closed.
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 |
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| Publication Number | Publication Date |
|---|---|
| CN113153378A CN113153378A (en) | 2021-07-23 |
| CN113153378B true CN113153378B (en) | 2024-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| 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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| CN115110578B (en) * | 2022-07-15 | 2024-04-12 | 中铁十九局集团第三工程有限公司 | Electric control type positive accumulation temperature diversion open cut tunnel structure of tunnel in quaternary freezing area and regulation and control method |
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