CN214366116U - Railway tunnel active anti-freezing system in seasonally frozen soil area - Google Patents
Railway tunnel active anti-freezing system in seasonally frozen soil area Download PDFInfo
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- CN214366116U CN214366116U CN202120367345.6U CN202120367345U CN214366116U CN 214366116 U CN214366116 U CN 214366116U CN 202120367345 U CN202120367345 U CN 202120367345U CN 214366116 U CN214366116 U CN 214366116U
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Abstract
The utility model relates to the technical field of railway tunnel freezing prevention, and provides a railway tunnel active freezing prevention system in seasonally frozen soil areas, which comprises a railway tunnel; the railway tunnel is divided into a plurality of anti-freezing sections along the longitudinal direction of the railway tunnel; each anti-freezing section is internally provided with a heating cable, a cable switch and a first temperature sensor; the heating cable is arranged between the primary support and the rock body; the cable switch is connected with the heating cable in series; and the measuring end of the first temperature sensor is arranged between the primary support and the rock body. Through set up heating cable between the first support and the rock mass at railway tunnel, when the temperature between the first support and the rock mass of railway tunnel is close 0 ℃, accessible heating cable heats it to guarantee that the temperature between the first support and the rock mass of railway tunnel is higher than 0 ℃, avoid the infiltration between the first support and the rock mass of railway tunnel to freeze, improved the security during the operation of railway tunnel.
Description
Technical Field
The utility model belongs to the technical field of the railway tunnel technique of preventing frostbite and specifically relates to a railway tunnel initiative anti-freezing system in seasonally frozen ground area.
Background
A large number of engineering practices show that the difficult problem of frost heaving which is difficult to solve exists when the tunnel is built in the seasonally frozen soil area. The tunnel passes through the seasonal frozen soil area, ice in the seasonal frozen soil is melted in high-temperature seasons due to heat balance, and water in the frozen soil is frozen in low-temperature seasons, so that frost heaving is generated on a supporting structure of the tunnel. The frost heaving effect is the main reason for causing the railway tunnel in the seasonally frozen ground area to have diseases, not only can cause serious damage to the tunnel structure, also causes the hidden danger for tunnel operation safety simultaneously.
In order to control tunnel diseases of seasonal frozen soil within a range allowed by engineering operation, tunnels in seasonal frozen soil areas are basically designed by adopting an antifreezing principle, and at present, the most common antifreezing method is a heat insulation layer method. The laying of the heat insulation layer mainly has two modes: one is to lay the heat insulation layer directly on the surface of the second liner, namely to stick to the wall; the other is to lay a heat insulation layer between the primary support and the secondary lining, namely a sandwich type.
Because the operation environment of the highway tunnel is relatively simple, wall-mounted anti-freezing measures are widely adopted, a better anti-freezing effect is achieved, and the freezing damage of the highway tunnel in a cold region is avoided. For the railway tunnel, if the wall-attached type anti-freezing measure is adopted, the cross section of the tunnel is relatively small, the wind load effect of train piston wind on the heat insulation layer is large, the heat insulation layer is easy to fall off to influence the driving safety, and in addition, the fireproof performance of the current heat insulation layer hardly meets the fireproof grade requirement of the electric railway, so that the wall-attached type measure is generally not suitable for the railway tunnel. In addition, when the railway tunnel adopts a sandwich type anti-freezing measure, the heat-insulating material is easily compressed under the long-term load of surrounding rocks, so that the structural stability of the heat-insulating material is influenced; due to the reason of the composite lining underground water drainage and guide system, the waterproof board is easy to break, so that the durability of the heat-insulating material is reduced due to the fact that the heat-insulating material is soaked in water, the service life of the heat-insulating material is shortened, and the heat-insulating material is difficult to repair in the later period.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a railway tunnel initiative anti-freezing system in seasonally frozen soil area is provided, the security of railway tunnel operation is guaranteed.
The utility model provides a technical scheme that its technical problem adopted is: the railway tunnel active anti-freezing system in the seasonally frozen ground area comprises a railway tunnel; a plurality of drain pipes are arranged between the primary support and the rock mass of the railway tunnel along the longitudinal direction and the transverse direction;
the railway tunnel is divided into a plurality of anti-freezing sections along the longitudinal direction of the railway tunnel; each anti-freezing section is internally provided with a heating cable, a cable switch and a first temperature sensor; the heating cable is arranged between the primary support and the rock body; the cable switch is connected with the heating cable in series; the measuring end of the first temperature sensor is arranged between the primary support and the rock body;
the device also comprises a controller; the first temperature sensor in each anti-freezing section is connected with the controller and used for sending temperature information to the controller; the controller is also connected with the cable switch in each anti-freezing section and used for controlling the connection and disconnection of the cable switch in the corresponding anti-freezing section according to the received temperature information.
Further, the length of the railway tunnel is L1; wherein L1 is more than or equal to 2000 m; the length of the anti-freezing section is L2; wherein L2 is more than or equal to 100m and less than or equal to 200 m.
Further, the distance between the adjacent drain pipes in the longitudinal direction of the railway tunnel is L3; wherein L3 is more than or equal to 4m and less than or equal to 6 m; the distance between the adjacent drain pipes in the direction along the lateral direction of the railway tunnel is L4; wherein L4 is more than or equal to 4m and less than or equal to 6 m.
Further, the heating cable is wound around the drain pipe.
Further, the system also comprises an upper computer and a display; the upper computer is respectively connected with the controller and the display.
Further, the system also comprises an input terminal; the input terminal is connected with the upper computer.
Further, the controller is a single chip microcomputer.
Further, the first temperature sensor is a thermocouple.
The utility model has the advantages that:
1. the utility model discloses railway tunnel initiative anti-freezing system in seasonally frozen soil area, through set up heating cable between the first support in railway tunnel and the rock mass, when the temperature between the first support in railway tunnel and the rock mass is close 0 ℃, accessible heating cable heats it, with the temperature of guaranteeing between the first support in railway tunnel and the rock mass be higher than 0 ℃, avoid railway tunnel's the first support and the rock mass between the infiltration water freeze, prevent to appear freezing injury phenomenon, the security during railway tunnel operation has been improved.
2. Through setting up first temperature sensor for the temperature between the first branch of real-time supervision railway tunnel and the rock mass to with temperature information transmission to controller, the controller is according to the switching on or the disconnection of received temperature information control cable switch, with the work of automatic control heating cable, realizes unmanned on duty, reaches the intelligent heating of anti-freezing system and the accuse temperature effect in railway tunnel.
3. The utility model discloses railway tunnel initiative anti-freezing system in seasonally frozen soil area is particularly useful for the railway tunnel that length is greater than 2000m, through vertically dividing the railway tunnel into a plurality of section of preventing frostbite along it, and set up heating cable and cable switch in every section of preventing frostbite, like this with the cable switch individual control of accessible controller in to every section of preventing frostbite, in order to reach the effect of every section of preventing frostbite to railway tunnel individual heating and accuse temperature, the electric energy has been practiced thrift, the maintenance cost in tunnel has been reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below; it is obvious that the drawings in the following description are only some of the embodiments described in the present application, and that other drawings can be derived from these drawings by a person skilled in the art without inventive effort.
Fig. 1 is a schematic structural view of a railway tunnel according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
fig. 3 is a block diagram of an active antifreeze system for railway tunnels in seasonally frozen ground areas in accordance with an embodiment of the present invention.
Reference numerals: the method comprises the following steps of 1-a railway tunnel, 2-primary support, 3-rock mass, 4-drain pipe, 5-heating cable, 6-cable switch, 7-first temperature sensor, 8-controller, 9-upper computer, 10-display and 11-input terminal.
Detailed Description
In order to make the present invention better understood by those skilled in the art, the present invention will be further described with reference to the accompanying drawings and examples. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. In case of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.
Referring to fig. 1 to 3, an active anti-freezing system for a railway tunnel in a seasonally frozen ground area provided by the embodiment of the present invention includes a railway tunnel 1; a plurality of drain pipes 4 are arranged between the primary support 2 and the rock mass 3 of the railway tunnel 1 along the longitudinal direction and the transverse direction; the railway tunnel 1 is divided into a plurality of anti-freezing sections along the longitudinal direction of the railway tunnel; each anti-freezing section is internally provided with a heating cable 5, a cable switch 6 and a first temperature sensor 7; the heating cable 5 is arranged between the primary support 2 and the rock mass 3; the cable switch 6 is connected with the heating cable 5 in series; the measuring end of the first temperature sensor 7 is arranged between the primary support 2 and the rock mass 3; also includes a controller 8; the first temperature sensor 7 in each anti-freezing section is connected with the controller 8 and used for sending temperature information to the controller 8; the controller 8 is also connected with the cable switch 6 in each anti-freezing section and is used for controlling the connection and disconnection of the cable switch 6 in the corresponding anti-freezing section according to the received temperature information.
Referring to fig. 1 and 2, a plurality of drain pipes 4 are arranged between the primary support 2 and the rock mass 3 of the railway tunnel 1, and are used for draining seepage water between the primary support 2 and the rock mass 3 of the railway tunnel 1. Specifically, a plurality of drain pipes 4 are arranged in a grid pattern in the longitudinal and transverse directions of the railway tunnel 1 and are connected to each other to form a drain pipe network. Wherein, the longitudinal direction of the railway tunnel 1 refers to the length direction of the railway tunnel 1, and the transverse direction of the railway tunnel 1 refers to the width direction of the railway tunnel 1. For example, in the longitudinal direction along the railway tunnel 1, the distance between the adjacent drain pipes 4 is L3; wherein L3 is more than or equal to 4m and less than or equal to 6 m; the distance between the adjacent drain pipes 4 in the lateral direction along the railway tunnel 1 is L4; wherein L4 is more than or equal to 4m and less than or equal to 6 m.
The railway tunnel 1 is divided into a plurality of anti-freezing sections along the longitudinal direction, so that an active anti-freezing device can be independently arranged in each anti-freezing section to achieve the aim of preventing the railway tunnel 1 from freezing in a subsection mode. The number of the anti-freezing sections is set according to the length of the railway tunnel 1; the longer the length of the railway tunnel 1, the greater the number of the freeze-protected sections, which is not particularly limited herein. For example, the length of the railway tunnel 1 is L1; wherein L1 is more than or equal to 2000 m; the length of the anti-freezing section is L2; wherein L2 is more than or equal to 100m and less than or equal to 200 m.
Each anti-freezing section is internally provided with a heating cable 5, a cable switch 6 and a first temperature sensor 7.
The heating cable 5 is arranged between the primary support 2 and the rock mass 3 of the railway tunnel 1, and is used for heating after being electrified and improving the temperature between the primary support 2 and the rock mass 3 so as to ensure that the temperature between the primary support 2 and the rock mass 3 of the railway tunnel 1 is higher than 0 ℃ and prevent the water seepage and the icing between the primary support 2 and the rock mass 3 of the railway tunnel 1. The arrangement mode of the heating cable 5 between the primary support 2 and the rock mass 3 is not particularly limited, as long as the temperature of each position between the primary support 2 and the rock mass 3 in the anti-freezing section can be higher than 0 ℃ after the heating cable 5 is electrified. In one embodiment, the heating cable 5 is wound around the drain pipe 4.
The cable switch 6 is a switch which can realize on-off control through an electric signal or realize on-off control according to the characteristics of components. The cable switch 6 in each antifreeze section is connected in series with the heating cable 5 in that section. The installation position of the cable switch 5 in each anti-freezing section is not specifically limited, but it should be ensured that it is convenient to repair and replace it at a later stage.
The first temperature sensor 7 is a sensor which can sense the temperature and convert the temperature into a usable output signal. The measuring end of the first temperature sensor 7 is arranged between the primary support 2 and the rock mass 3, so that the temperature between the primary support 2 and the rock mass 3 can be measured, and the later maintenance and replacement of the primary support 2 and the rock mass 3 are facilitated. Preferably, two first temperature sensors 7 are respectively arranged in each freeze protection section on both sides of the railway tunnel 1. In this embodiment, the first temperature sensor 7 is a thermocouple. Of course, the first temperature sensor 7 may also be a bimetallic strip temperature sensor, a resistance temperature sensor, etc., and is not limited in particular.
The controller 8 is any device capable of outputting a control command according to a set condition to control the corresponding connection or disconnection of the switch connected thereto, such as a single chip microcomputer, a PLC controller, and the like. In this embodiment, the controller 8 is a single chip microcomputer, and the cable switch 6 and the first temperature sensor 7 in each anti-freezing section are both connected with the controller 8. A high temperature threshold T1 and a low temperature threshold T2 are set in the controller 8; for example, T1 ═ 5 ℃ and T2 ═ 0 ℃. During operation, the first temperature sensor 7 sends the measured temperature information to the controller 8; when the temperature information received by the controller 8 is smaller than the low-temperature threshold value T2, the controller 8 controls the cable switch 6 in the corresponding anti-freezing section to be switched on; when the temperature information received by the controller 8 is greater than the high temperature threshold T1, the controller 8 controls the cable switch 6 in the corresponding anti-freeze section to be opened.
The embodiment of the utility model provides a railway tunnel initiative anti-freezing system in seasonally frozen soil area should be under construction simultaneously with railway tunnel 1's supporting construction. After the railway tunnel active anti-freezing system in the seasonally frozen ground area provided by the embodiment of the utility model is constructed, before operation, the heating cable 5 and the cable switch 6 in each anti-freezing section are connected with the special power supply of the railway line in series to form a loop; in the operation process, the temperature between the primary support 2 and the rock mass 3 of the railway tunnel 1 is detected through a first temperature sensor 7, the detected temperature information is sent to a controller 8, a high-temperature threshold T1 set in the controller 8 is 5 ℃, and a low-temperature threshold T2 is 0 ℃; when the controller 8 receives a certain temperature signal and is lower than 0 ℃, the controller 8 controls the cable switch 6 in the corresponding anti-freezing section to be conducted, the heating cable 5 in the anti-freezing section works to convert electric energy into heat energy, the temperature between the primary support 2 and the rock mass 3 in the anti-freezing section is increased, water seepage and icing between the primary support 2 and the rock mass 3 are avoided, and water seepage between the primary support 2 and the rock mass 3 is ensured to be smoothly discharged in the water discharge pipe 4. When the controller 8 receives a certain temperature signal which is higher than 5 ℃, the controller 8 controls the cable switch 6 in the corresponding anti-freezing section to be switched off, the heating cable 5 in the anti-freezing section stops working, and electric energy is saved.
The utility model discloses railway tunnel initiative anti-freezing system in seasonally frozen soil area, through set up heating cable 5 between the first 2 and rock mass 3 at railway tunnel 1, when the temperature between the first 2 and rock mass 3 of railway tunnel 1 is close 0 ℃, accessible heating cable 5 heats it, improve the temperature between the first 2 and rock mass 3, with the temperature between the first 2 and rock mass 3 of guaranteeing railway tunnel 1 is higher than 0 ℃, avoid the frozen infiltration between the first 2 and rock mass 3 of railway tunnel 1, the security during railway tunnel operation has been improved.
Through setting up first temperature sensor 7 for the temperature between the first support 2 of real-time supervision railway tunnel 1 and rock mass 3, and with temperature information transmission to controller 8, controller 8 is according to the switching on or the disconnection of received temperature information control cable switch 6, with the work of automatic control heating cable, realizes unmanned on duty, reaches the intelligent heating of anti-freezing system and the accuse temperature effect in railway tunnel.
The utility model discloses railway tunnel initiative anti-freezing system in seasonally frozen soil area, be particularly useful for the railway tunnel that length is greater than 2000m, through vertically dividing the railway tunnel into a plurality of section of preventing frostbite along it, and set up heating cable 5 and cable switch 6 in every section of preventing frostbite, so with the cable switch 6 independent control of accessible controller in to every section of preventing frostbite, in order to reach the effect of every section of preventing frostbite to the railway tunnel independent heating and accuse temperature, the electric energy has been practiced thrift, the maintenance cost in tunnel has been reduced.
Referring to fig. 3, the active anti-freezing system for railway tunnels in seasonally frozen soil areas provided by the embodiment of the present invention further comprises an upper computer 9 and a display 10; the upper computer 9 is respectively connected with the controller 8 and the display 10. The upper computer 9 can be a computer, a notebook computer and other equipment. Through setting up host computer 9 and display 10, after controller 8 received temperature information, can transmit temperature information to host computer 9 storage to show on display 10, just so be convenient for operating personnel to look up the temperature variation between the primary support 2 of railway tunnel 1 and rock mass 3.
The embodiment of the utility model provides a railway tunnel initiative anti-freezing system in seasonally frozen ground area still includes input terminal 11; the input terminal 11 is connected with the upper computer 9. The input terminal 11 can be an input device such as a mobile phone, a tablet, a keyboard and the like, and can be used for inputting a target temperature to the upper computer 9 and sending the target temperature to the controller 8 through the upper computer 9 so as to adjust a high-temperature threshold and a low-temperature threshold in the controller 8; and can also input the order to host computer 9, send to controller 8 through host computer 9, through the switch-on of controller 8 control cable switch 6 or break off.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The railway tunnel active anti-freezing system in the seasonally frozen ground area comprises a railway tunnel (1); a plurality of drain pipes (4) are arranged between the primary support (2) and the rock mass (3) of the railway tunnel (1) along the longitudinal direction and the transverse direction;
the anti-freezing railway tunnel is characterized in that the railway tunnel (1) is divided into a plurality of anti-freezing sections along the longitudinal direction; each anti-freezing section is internally provided with a heating cable (5), a cable switch (6) and a first temperature sensor (7); the heating cable (5) is arranged between the primary support (2) and the rock body (3); the cable switch (6) is connected with the heating cable (5) in series; the measuring end of the first temperature sensor (7) is arranged between the primary support (2) and the rock body (3);
further comprising a controller (8); the first temperature sensor (7) in each anti-freezing section is connected with the controller (8) and used for sending temperature information to the controller (8); the controller (8) is also connected with the cable switch (6) in each anti-freezing section and is used for controlling the connection and disconnection of the cable switch (6) in the corresponding anti-freezing section according to the received temperature information.
2. Active antifreeze system for railway tunnels in seasonally frozen ground areas according to claim 1, characterized in that said railway tunnel (1) has a length of L1; wherein L1 is more than or equal to 2000 m; the length of the anti-freezing section is L2; wherein L2 is more than or equal to 100m and less than or equal to 200 m.
3. Active antifreeze system for railway tunnels in seasonally frozen ground areas according to claim 2, characterized in that the distance between adjacent drain pipes (4) in the longitudinal direction of the railway tunnel (1) is L3; wherein L3 is more than or equal to 4m and less than or equal to 6 m; the distance between adjacent drain pipes (4) in the direction along the lateral direction of the railway tunnel (1) is L4; wherein L4 is more than or equal to 4m and less than or equal to 6 m.
4. Active antifreeze system for railway tunnels in seasonally frozen ground areas according to claim 3, characterized by the fact that said heating cable (5) is wound on the drain pipe (4).
5. Active antifreeze system for railway tunnels in seasonally frozen ground areas according to claim 1, 2, 3 or 4, characterized by further comprising an upper computer (9) and a display (10); the upper computer (9) is respectively connected with the controller (8) and the display (10).
6. Active antifreeze system for railway tunnels in seasonally frozen ground areas according to claim 5, characterized by comprising also an input terminal (11); the input terminal (11) is connected with the upper computer (9).
7. Active antifreeze system for railway tunnels in seasonally frozen ground areas according to claim 1, characterized in that said controller (8) is a single-chip microcomputer.
8. Active antifreeze system for railway tunnels in seasonally frozen ground areas according to claim 1, characterized in that said first temperature sensor (7) is a thermocouple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120367345.6U CN214366116U (en) | 2021-02-07 | 2021-02-07 | Railway tunnel active anti-freezing system in seasonally frozen soil area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120367345.6U CN214366116U (en) | 2021-02-07 | 2021-02-07 | Railway tunnel active anti-freezing system in seasonally frozen soil area |
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| CN214366116U true CN214366116U (en) | 2021-10-08 |
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| CN202120367345.6U Active CN214366116U (en) | 2021-02-07 | 2021-02-07 | Railway tunnel active anti-freezing system in seasonally frozen soil area |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114109453A (en) * | 2021-11-05 | 2022-03-01 | 重庆交通大学 | Automatic heat preservation control structure of traffic tunnel in frozen soil district in season |
| CN114319390A (en) * | 2022-01-19 | 2022-04-12 | 西南石油大学 | Novel design of deep drain hole for heat exchange of side (slide) slope in seasonal frozen soil area |
-
2021
- 2021-02-07 CN CN202120367345.6U patent/CN214366116U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114109453A (en) * | 2021-11-05 | 2022-03-01 | 重庆交通大学 | Automatic heat preservation control structure of traffic tunnel in frozen soil district in season |
| CN114319390A (en) * | 2022-01-19 | 2022-04-12 | 西南石油大学 | Novel design of deep drain hole for heat exchange of side (slide) slope in seasonal frozen soil area |
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