CN112709601A - Anti-freezing structure and method for tunnel drainage side ditch - Google Patents
Anti-freezing structure and method for tunnel drainage side ditch Download PDFInfo
- Publication number
- CN112709601A CN112709601A CN202011644079.3A CN202011644079A CN112709601A CN 112709601 A CN112709601 A CN 112709601A CN 202011644079 A CN202011644079 A CN 202011644079A CN 112709601 A CN112709601 A CN 112709601A
- Authority
- CN
- China
- Prior art keywords
- drainage
- ditch
- tunnel
- heat
- plate
- Prior art date
- 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.)
- Pending
Links
- 238000007710 freezing Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 230000000903 blocking effect Effects 0.000 claims abstract description 14
- 239000010410 layer Substances 0.000 claims description 34
- 239000011241 protective layer Substances 0.000 claims description 17
- 230000002528 anti-freeze Effects 0.000 claims description 9
- 230000008014 freezing Effects 0.000 claims description 9
- 238000004321 preservation Methods 0.000 claims description 9
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 239000011810 insulating material Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 22
- 229910000831 Steel Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000004873 anchoring Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- PCTMTFRHKVHKIS-BMFZQQSSSA-N (1s,3r,4e,6e,8e,10e,12e,14e,16e,18s,19r,20r,21s,25r,27r,30r,31r,33s,35r,37s,38r)-3-[(2r,3s,4s,5s,6r)-4-amino-3,5-dihydroxy-6-methyloxan-2-yl]oxy-19,25,27,30,31,33,35,37-octahydroxy-18,20,21-trimethyl-23-oxo-22,39-dioxabicyclo[33.3.1]nonatriaconta-4,6,8,10 Chemical compound C1C=C2C[C@@H](OS(O)(=O)=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2.O[C@H]1[C@@H](N)[C@H](O)[C@@H](C)O[C@H]1O[C@H]1/C=C/C=C/C=C/C=C/C=C/C=C/C=C/[C@H](C)[C@@H](O)[C@@H](C)[C@H](C)OC(=O)C[C@H](O)C[C@H](O)CC[C@@H](O)[C@H](O)C[C@H](O)C[C@](O)(C[C@H](O)[C@H]2C(O)=O)O[C@H]2C1 PCTMTFRHKVHKIS-BMFZQQSSSA-N 0.000 description 1
- 206010060904 Freezing phenomenon Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002159 nanocrystal Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- 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
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention provides an anti-freezing structure and an anti-freezing method for a tunnel drainage side ditch, and the anti-freezing structure comprises the drainage side ditch, water drainage holes, blocking plates and heat tracing plates, wherein the drainage side ditch is longitudinally arranged at two sides of a tunnel, the water drainage holes longitudinally extend to a ballast bed side wall body from the drainage side ditch at intervals, the blocking plates are connected to the ballast bed side wall body and block the water drainage holes, and the heat tracing plates are connected to the inner wall of the drainage side ditch close to one side of the ballast bed side wall body. That is, in this embodiment, the drain hole of the drain side groove close to the ballast side wall is blocked by the blocking plate, and the temperature in the drain side groove is raised by heating the heat tracing plate connected to the inner wall of the drain side groove close to the ballast side wall, thereby preventing the water in the drain side groove from being frozen.
Description
Technical Field
The invention relates to the technical field of tunnel construction, in particular to an anti-freezing structure and an anti-freezing method for a tunnel drainage lateral ditch.
Background
The tunnel bottom structure of present design is generally the structure of taking inverted arch (or bottom plate), and groundwater drainage route is: surrounding rock → preliminary bracing → drainage blind pipe → lateral ditch → transverse drainage pipe → central drainage lateral ditch; namely, water around the tunnel structure is drained to a central drainage side ditch in the tunnel structure body through the drainage blind pipe by primary support permeation and finally drained out of the tunnel. However, since the side grooves are communicated with the outside, the water in the side grooves exchanges heat with the cold air from the outside, so that the temperature of the water is lowered and the cold air is frozen after entering the side grooves.
Disclosure of Invention
The invention mainly aims to overcome the defects of the prior art and provide an anti-freezing structure of a tunnel drainage side ditch.
In order to achieve the above object, the present invention provides an anti-freezing structure of a tunnel drainage lateral ditch, which comprises:
the drainage side ditches are longitudinally arranged on two sides of the tunnel;
the drainage side ditch is provided with drainage holes, and the drainage holes longitudinally extend to the side wall body of the ballast bed at intervals;
the plugging plate is connected to the side wall body of the road bed and plugs the drainage hole;
and the heat tracing plate is connected to the inner wall of the drainage side ditch close to one side of the ballast bed side wall body.
In an optional embodiment, the anti-freezing structure of the tunnel drainage side ditch further comprises:
a power supply assembly electrically connected with the heat trace board to provide power to the heat trace board.
In an alternative embodiment, the power supply assembly is a newly added box transformer or an existing box transformer.
In an optional embodiment, the anti-freezing structure of the tunnel drainage side ditch further comprises:
a control device;
and the temperature sensor is arranged in the drainage side ditch and is electrically connected with the control device.
In an optional embodiment, the anti-freezing structure of the tunnel drainage side ditch further comprises:
the fixing piece is connected to the inner wall of the drainage side ditch at one end, and the first cover plate is connected with one end of the fixing piece so as to enable the first cover plate to be covered on the drainage side ditch;
the temperature sensor comprises a temperature sensing part and a connecting part, wherein the temperature sensing part is arranged in the through hole in a penetrating way, and the connecting part is arranged on the first cover plate.
In an optional embodiment, the anti-freezing structure of the tunnel drainage side ditch further comprises:
the second cover plate is covered on the drainage lateral ditch and is arranged at intervals with the first cover plate;
the heat preservation piece is arranged between the first cover plate and the second cover plate.
In an optional embodiment, the heat preservation piece is made of thick polyurethane heat preservation materials, and the thickness of the heat preservation piece is 30 cm.
In an alternative embodiment, the heat trace panel comprises:
a first protective layer;
a first insulating layer disposed on the first protective layer;
the heating layer is arranged on one side, away from the first protective layer, of the first insulating layer;
the second insulating layer is arranged on one side, away from the first insulating layer, of the heating layer;
and the second protective layer is arranged on one side of the second insulating layer, which deviates from the heating layer.
In order to achieve the above object, the present invention further provides a method for preventing freezing of a tunnel drainage lateral ditch, which is applied to the above anti-freezing structure of a tunnel drainage lateral ditch, and the method for preventing freezing of a tunnel drainage lateral ditch comprises:
acquiring temperature values in drainage side ditches longitudinally arranged at two sides of a tunnel;
and controlling the heat tracing plate to generate heat according to the temperature value, wherein the heat tracing plate is arranged on the inner wall of the side ditch of the drainage side close to one side of the side wall body of the track bed.
In an optional embodiment, before the step of obtaining the temperature value in the gutter, the method further includes:
and blocking the drainage holes by adopting a blocking plate, wherein the drainage holes longitudinally extend from the drainage side ditch to the side wall body of the ballast bed at intervals.
The invention provides an anti-freezing structure and an anti-freezing method for a tunnel drainage side ditch, and the anti-freezing structure comprises the drainage side ditch, water drainage holes, blocking plates and heat tracing plates, wherein the drainage side ditch is longitudinally arranged at two sides of a tunnel, the water drainage holes longitudinally extend to a ballast bed side wall body from the drainage side ditch at intervals, the blocking plates are connected to the ballast bed side wall body and block the water drainage holes, and the heat tracing plates are connected to the inner wall of the drainage side ditch close to one side of the ballast bed side wall body. That is, in this embodiment, the drain hole of the drain side groove close to the ballast side wall is blocked by the blocking plate, and the temperature in the drain side groove is raised by heating the heat tracing plate connected to the inner wall of the drain side groove close to the ballast side wall, thereby preventing the water in the drain side groove from being frozen.
Drawings
In order to more clearly illustrate the embodiments or exemplary technical solutions of the present invention, the drawings used in the embodiments or exemplary descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic cross-sectional view of an anti-freezing structure of a tunnel drainage side ditch according to an embodiment of the invention;
FIG. 2 is an enlarged view of the structure of part B in FIG. 1;
FIG. 3 is a schematic structural view of a heat trace board according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating steps of a method for preventing freezing of a lateral drainage ditch of a tunnel according to an embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides an anti-freezing structure of a tunnel drainage side ditch.
In one embodiment, as shown in fig. 1, the anti-freezing structure of the tunnel drainage side ditch comprises a drainage side ditch 1, drainage holes 2, plugging plates 3 and heat tracing plates 4, wherein the drainage side ditch 1 is longitudinally arranged at two sides of the tunnel, the drainage holes 2 longitudinally extend from the drainage side ditch 1 to a roadbed side wall body a at intervals, the plugging plates 3 are connected to the roadbed side wall body a and plug the drainage holes 2, and the heat tracing plates 4 are connected to the inner wall of the drainage side ditch 1 at the side close to the roadbed side wall body a. That is, in the present embodiment, the drain hole 2 of the drain side groove 1 adjacent to the roadbed side wall a is blocked by the blocking plate 3, and the heat tracing plate 4 connected to the inner wall of the drain side groove 1 adjacent to the roadbed side wall a is heated to raise the temperature in the drain side groove 1, thereby preventing the water in the drain side groove 1 from being frozen.
Further, the anti-freezing structure of the tunnel drainage side ditch further comprises an arch wall 10, wherein the arch wall 10 comprises a primary support 11, a waterproof layer 12 and a secondary lining 13 which are arranged from outside to inside, annular drainage blind pipes 14 are arranged between the primary support 11 and the waterproof layer 12 at intervals, two ends of each annular drainage blind pipe 14 are respectively connected with a longitudinal drainage blind pipe 8, one end, deviating from the annular drainage blind pipe 14, of each longitudinal drainage blind pipe 8 is communicated with the drainage side ditch 1, and each longitudinal drainage blind pipe 8 is higher than a central drainage side ditch (not shown). The underground water penetrates into the annular drainage blind pipes 14 buried in the secondary lining 13 through the primary supports 11, then enters the drainage lateral ditches 1 through the longitudinal drainage blind pipes 8, and the water collected in the drainage lateral ditches 1 enters the central drainage lateral ditches through the transverse drainage channels 15 and is finally discharged out of the tunnel body.
Furthermore, the circumferential drainage blind pipe 14 is a HDPE single-wall perforated corrugated pipe, and is circumferentially anchored at the back of the secondary lining 13 at the tunnel arch wall part, and the arch wall part is anchored on the surface of the primary support 11 by using anchoring nails and waterproof strip strips, and the anchoring distance is about 50 cm.
During actual construction, the circumferential drainage blind pipe 14 is anchored on the surface of the primary support 11 by using an anchoring nail and a waterproof plate narrow strip, then a ditch is deeply buried in the construction center, the circumferential drainage blind pipe 14 at the inverted arch position is sleeved on a PVC protection pipe, and concrete is poured in the ditch.
Further, the anti-freezing structure of the tunnel drainage side ditch further comprises a cable trough 5 arranged between the drainage side ditch 1 and the secondary lining 13, wherein the cable trough 5 is used for laying cables, and the cable trough 5 is communicated with the drainage side ditch 1 through a water drainage trough 6.
Optionally, the diameter of the drainage holes 2 is 50mm, and the longitudinal interval ranges from 3m to 5 m.
Optionally, the diameter of the drainage groove 6 is 4cm, and the drainage grooves 6 are longitudinally arranged at intervals, and the interval ranges from 3m to 5 m.
Optionally, the circumferential drainage blind pipes 14 are longitudinally arranged at intervals, and the interval ranges from 8m to 12 m.
Furthermore, the drain hole 2 guides the water in the inverted arch filling into the drain side ditch 1, and the distance between the drain hole 2 and the bottom of the drain side ditch 1 is 22cm, so that the water in the inverted arch filling can be smoothly discharged into the drain side ditch 1.
Further, the anti-freezing structure of the tunnel drain side ditch further comprises a power supply assembly 7, wherein the power supply assembly 7 is electrically connected with the heat tracing plate 4 to supply power to the heat tracing plate 4, so that the heat tracing plate 4 is electrified to generate heat, the temperature in the drain side ditch 1 is increased, and the water in the drain side ditch 1 is prevented from being frozen.
Specifically, the heat tracing plates 4 comprise a plurality of blocks, that is, the heat tracing plates 4 are all attached to the inner walls of the two side drainage channels 1 close to one side of the ballast bed side wall. The power supply assembly 7 is a newly-added box type transformer, namely, each newly-added box type transformer independently controls one of the heat tracing plates 4, or each newly-added box type transformer independently controls one group of the heat tracing plates 4, wherein one group of the heat tracing plates 4 is an electric circuit formed by a plurality of the heat tracing plates 4, so that the newly-added box type transformer is electrically connected to the group of the heat tracing plates 4. In addition, when a newly-added box type transformer is adopted, the power supply assembly 7 is good in reliability, large in heat productivity, beneficial to freezing resistance and heat preservation, free of replacement of an existing box type transformer, capable of achieving independent control of the effect of the heat tracing plate 4 and free of influence on power supply of an existing power system.
Of course, the power supply assembly 7 may also be an existing box transformer in this embodiment. For example, the power supply unit 7 supplies power to the antifreeze system of the heat-tracing plate 4 by using the surplus power capacity 8KW of the existing box transformer.
Specifically, 4KW electric quantity is distributed to the heat tracing plates 4 in the drainage side ditches 1 on the left side and the right side respectively, the heat tracing plates 4 are installed and divided into four groups for power supply when the length is 200 meters, each group is 50 meters, the power of each group of the heat tracing plates 4 is 3.5kW, and temperature control is adopted and the heat tracing plates are started in sequence; or, the length of the heat tracing plate 4 is 150 meters, the heat tracing plate is divided into three groups for power supply, each group is 50 meters in length, the power of the heat tracing plate 4 in each group is 3.5kW, and the heat tracing plates are controlled by temperature and are sequentially started. At this time, each set of the heat tracing plates 4 is divided into three loops in consideration of three-phase balance of the power supply. For example, the installation mileage of the heat tracing plate 4 on the left side of the flag tunnel is 200 meters, the power supply capacity is 4KW, the heat tracing plate 4 is divided into four groups of ABCD, each group is divided into 3 loops, 12 loops of the heat tracing plate 4 are formed, each group is 50 meters in length, the power of each group of the heat tracing plate 4 is 3.5KW, the temperature in the lateral drainage channel 1 is controlled by a temperature controller, the temperature controller is set to maintain the temperature in the lateral drainage channel 1 to be 5 ℃ -10 ℃ (when the temperature in the lateral drainage channel is lower than 5 ℃, the heat tracing plate 4 is started to heat, and when the temperature in the lateral drainage channel 1 is higher than 10 ℃, the heat tracing plate 4 is stopped to work). After the system is started, the heat tracing plates 4 of the group A start to work, and when the temperature in the drainage side ditch 1 of the group A reaches 10 ℃, the group A stops working; meanwhile, the heat tracing plate 4 of the group B is started to heat, and when the temperature in the drainage side ditch 1 of the group B reaches 10 ℃, the group B stops working; meanwhile, the heat tracing plates 4 in the group C are started to heat, and when the temperature in the drainage side ditch 1 in the group C reaches 10 ℃, the group C stops working; meanwhile, the heat tracing plates 4 in the group D are started to heat, when the temperature in the drainage side ditch 1 in the group D reaches 10 ℃, the group D stops working, and a work cycle heating process is completed.
Of course, in other embodiments, the power supply assembly 7 may also be used as a power supply for lighting in a tunnel or a power supply for reconstruction, and is not limited herein.
Furthermore, the anti-freezing structure of the tunnel drainage side ditch further comprises a control device (not shown) and a temperature sensor (not shown), wherein the temperature sensor is arranged in the drainage side ditch 1 and is electrically connected with the control device. The temperature sensor is used for detecting the temperature in the drainage lateral ditch 1 and transmitting the temperature value in the drainage lateral ditch 1 to the control device, and the control device controls the heat tracing plate 4 to generate heat according to the temperature value.
Further, as shown in fig. 2, the anti-freezing structure of the tunnel drainage side ditch further includes a fixing member 8 and a first cover plate 9, one end of the fixing member 8 is connected to the inner wall of the drainage side ditch 9, and one end of the fixing member 8 is connected to the first cover plate 9, so that the first cover plate 9 covers the drainage side ditch 1. The first cover plate 9 is provided with a through hole (not shown), the temperature sensor includes a temperature sensing portion and a connecting portion, the temperature sensing portion is inserted into the through hole, and the connecting portion is mounted on the first cover plate 9.
Alternatively, the fixing member 8 is an angle steel and a bolt, that is, after one end of the angle steel is fixed on the first cover plate 9, the other end of the angle steel is fixed on the inner wall of the drainage lateral ditch 1 through the bolt.
Further, the anti-freezing structure of the tunnel drainage side ditch further comprises a heat preservation member 91 and a second cover plate 92 covering the drainage side ditch 1, the second cover plate 92 and the first cover plate 9 are arranged at intervals, the heat preservation member 91 is arranged between the first cover plate 91 and the second cover plate 92, and the second cover plate 92 and the heat preservation member 91 are used for plugging the drainage side ditch 1 so as to ensure the temperature in the drainage side ditch 1.
Optionally, the thermal insulation member 91 is made of a thick polyurethane thermal insulation material, and the thickness of the thermal insulation member 91 is 30 cm. Of course, in other embodiments, the heat insulating member 91 may also be made of other heat insulating materials, and the thickness of the heat insulating member 91 is other thicknesses, which is not limited herein.
Optionally, the first cover plate 9 and the second cover plate 92 are made of C35 concrete steel bars. Of course, in other embodiments, the first cover plate 9 and the second cover plate 92 may also use other types of steel bars, which is not limited herein.
Further, as shown in fig. 3, the heat-tracing plate 4 includes a first protective layer 41, a first insulating layer 42, a heat generating layer 43, a second insulating layer 44, and a second protective layer 45, the first insulating layer 42 is provided on the first protective layer 41, the heat generating layer 43 is provided on a side of the first insulating layer 42 facing away from the first protective layer 41, the second insulating layer 44 is provided on a side of the heat generating layer 43 facing away from the first insulating layer 42, and the second protective layer 45 is provided on a side of the second insulating layer 44 facing away from the heat generating layer 43. The first protective layer 41 and the second protective layer 42 are made of stainless steel, and the stainless steel has good waterproof and corrosion-resistant properties and can effectively perform ground protection.
Further, the thickness of the heat tracing plate 4 is 1.5mm or less. The width of the heat tracing plate 4 is 20cm, the length of the heat tracing plate is 150cm, the power supply voltage is 36v, the power of the heat tracing plate 4 is 70W per meter, and the surface temperature is 45 ℃.
Optionally, the heat tracing plate 4 is controlled by two sets of control devices, a box body of the control device is designed to be constant in temperature, the control device realizes automatic start and stop of the control device in the drainage lateral ditch 1 through a temperature sensor arranged in the drainage lateral ditch 1, constant temperature in the drainage lateral ditch 1 in winter and unattended and automatic operation of the heat tracing plate 4 are realized, and the constant temperature of the drainage lateral ditch 1 is 5-10 ℃. The input power of the control device is 380v of three phases, the output is 36v of three phases, and the control device is provided with a transformation device.
Optionally, the heat tracing plates 4 in the drainage side ditches 1 are arranged in the range of 200m on the left and right sides of the tunnel entrance, and the heat tracing plates 4 are arranged on the drainage side ditches 1 close to the side wall A of the ballast bed. In the embodiment, the heat tracing plate 4 and the pre-branch cable connected with the heat tracing plate 4 are hung on the inner wall of the drainage lateral ditch 1 through stainless strips.
It is understood that after the heat tracing plate 4 is put into use, the drain side ditches 1 should be cleaned regularly, the bottom of the drain side ditches 1 should be kept clean, and impurities should be prevented from covering the drain side ditches 1 so as not to affect the heating effect.
Optionally, the plugging member 3 is made of a thick polyurethane thermal insulation material, and the thickness of the plugging member 3 is 10 cm. Of course, in other embodiments, the blocking member 3 may also be made of other heat insulating materials, and the thickness of the blocking member 3 is other thicknesses, which is not limited herein.
Further, the heat tracing plate 4 has the following effects:
(1) the heat tracing plate 4 is powered by 36V safe voltage, personal safety of system operators and post-engineering maintenance operators is greatly guaranteed, compared with non-safe voltage, the heat tracing plate can well avoid damage to human bodies caused by electric leakage or short circuit risks due to misoperation of operators or other reasons, and has very high safety performance.
(2) The plurality of heat tracing plates 4 are electrically connected in parallel, the fault of a single heat tracing plate 4 does not affect the normal work of other heat tracing plates 4, the fault length range is 1.5m, and only the single heat tracing plate 4 needs to be replaced, so that the maintenance is facilitated.
(3) The inner layer of the heat tracing plate 4 is provided with a first insulating layer 42 and a second insulating layer 44 which are made of high polymer synthetic materials, and the outermost layers are provided with a first protective layer 41 and a second protective layer 45 made of stainless steel plates, so that the heat tracing plate 4 has the characteristics of water resistance, ageing resistance, corrosion resistance and the like, and the service life can be as long as 30 years.
(4) The heat tracing plate 4 is a surface type heating body, the excellent plane heating characteristic of the nano crystal plate is fully utilized, the whole plane is synchronously heated during working, heat dissipation is continuously carried out in a large area, the heat balance effect is good, the limitation of traditional electric heating wire type heating is overcome, and the defects of discontinuous heating and poor heat balance effect of a heat dissipation product are overcome, so that the reliability of the heating performance is improved.
(5) The control device can realize accurate control according to the temperature change condition detected by the temperature sensor so as to automatically operate and save electric energy to the maximum extent.
In practical application, for example, a single tunnel in an inner Mongolia grassland has the total length of 5470 meters, and is long and cold in winter and has more wind and snow weather. According to the design meteorological data, the annual average temperature is about 2 ℃, the winter average temperature is-20 ℃, the lowest temperature is-36 ℃, the extreme lowest temperature is-39.4 ℃, the maximum freezing depth of the soil is 1.83m, the extreme lowest temperature is-48.1 ℃, and the maximum freezing depth of the soil on site is actually 3.3-3.5 m.
In 2013, in 3 months, large-area ice accumulation is found in the range of about 200m on the ground (without track laying) of the tunnel portal section, and the maximum thickness of an ice layer reaches about 1 m; when the tunnel is started in early 3 months in 2014, a large area of ballast surface and track within about 220m of a tunnel portal is frozen, and the ice surface height of part of sections exceeds the rail top elevation.
In 3 months of 2015, large-area icing is found on a ballast surface and a track within the range of 230 meters from a hole DK380+130 to a hole DK380+360, lines are completely iced, the height of the ice surface exceeds about 20-50 cm of the top surface of a cable trough cover plate of a ditch, icing phenomena also occur on a channel bed of a cutting outside the hole and a cutting ditch platform, the thickness of the ice and the ice is about 0.8-1.0 m, and no ice or water exists in the ditch near the front of the DK380+ 500.
In 2015 for 10 months, the heat tracing plate 4 is additionally arranged to prevent freezing till now, the tunnel drainage side ditch 1 has no freezing phenomenon, and drainage is smooth.
Based on the embodiment, the invention also provides an anti-freezing method for the tunnel drainage side ditch.
As shown in fig. 4, the anti-freezing method for the tunnel drainage side ditch comprises the following steps:
s100, acquiring temperature values longitudinally arranged in drainage side ditches on two sides of a tunnel;
and S200, controlling the heat tracing plate to heat according to the temperature value, wherein the heat tracing plate is arranged on the inner wall of the side of the drainage side channel close to the side wall of the track bed.
The drainage side ditch 1 is longitudinally arranged at two sides of the tunnel, the drainage holes 2 longitudinally extend from the drainage side ditch 1 to the roadbed side wall A at intervals, the plugging plate 3 is connected to the roadbed side wall A and plugs the drainage holes 2, and the heat tracing plate 4 is connected to the inner wall of the drainage side ditch 1 at the side close to the roadbed side wall A. That is, before step S10, the drain hole 2 needs to be blocked by the blocking plate 3.
Further, the present embodiment obtains the temperature values in the drainage side ditches longitudinally arranged at both sides of the tunnel by the temperature sensors. Wherein, temperature sensor locates in drainage lateral ditch 1, just temperature sensor with controlling means electric connection. The temperature sensor is used for detecting the temperature in the drainage lateral ditch 1 and transmitting the temperature value in the drainage lateral ditch 1 to the control device, and the control device controls the heat tracing plate 4 to generate heat according to the temperature value.
That is, in the present embodiment, the control device controls the heat tracing plate 4 connected to the inner wall of the drain side trench 1 on the side closer to the side wall a of the ballast bed to heat the water so as to raise the temperature in the drain side trench 1, thereby preventing the water in the drain side trench 1 from being frozen.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the specification and the drawings, or any other related technical fields directly or indirectly applied thereto under the conception of the present invention are included in the scope of the present invention.
Claims (10)
1. The utility model provides a freeze-proof structure of tunnel drainage lateral ditch which characterized in that, freeze-proof structure of tunnel drainage lateral ditch includes:
the drainage side ditches are longitudinally arranged on two sides of the tunnel;
the drainage side ditch is provided with drainage holes, and the drainage holes longitudinally extend to the side wall body of the ballast bed at intervals;
the plugging plate is connected to the side wall body of the road bed and plugs the drainage hole;
and the heat tracing plate is connected to the inner wall of the drainage side ditch close to one side of the ballast bed side wall body.
2. The antifreeze structure of tunnel drainage gutters according to claim 1, wherein said antifreeze structure of tunnel drainage gutters further comprises:
a power supply assembly electrically connected with the heat trace board to provide power to the heat trace board.
3. The antifreeze structure of the tunnel drainage lateral ditch of claim 2, wherein the power supply unit is a newly added box transformer or an existing box transformer.
4. The antifreeze structure of tunnel gutter according to claim 3, further comprising:
a control device;
and the temperature sensor is arranged in the drainage side ditch and is electrically connected with the control device.
5. The antifreeze structure of tunnel gutter according to claim 4, further comprising:
the fixing piece is connected to the inner wall of the drainage side ditch at one end, and the first cover plate is connected with one end of the fixing piece so as to enable the first cover plate to be covered on the drainage side ditch;
the temperature sensor comprises a temperature sensing part and a connecting part, wherein the temperature sensing part is arranged in the through hole in a penetrating way, and the connecting part is arranged on the first cover plate.
6. The antifreeze structure of tunnel gutter according to claim 5, further comprising:
the second cover plate is covered on the drainage lateral ditch and is arranged at intervals with the first cover plate;
the heat preservation piece is arranged between the first cover plate and the second cover plate.
7. The antifreeze structure of the tunnel drainage lateral ditch of claim 6, wherein the heat insulating member is made of a thick polyurethane heat insulating material, and the thickness of the heat insulating member is 30 cm.
8. The antifreeze structure of a tunnel drainage lateral ditch according to any one of claims 1 to 7, wherein the heat tracing plate comprises:
a first protective layer;
a first insulating layer disposed on the first protective layer;
the heating layer is arranged on one side, away from the first protective layer, of the first insulating layer;
the second insulating layer is arranged on one side, away from the first insulating layer, of the heating layer;
and the second protective layer is arranged on one side of the second insulating layer, which deviates from the heating layer.
9. A method for preventing the freezing of the drainage side ditch of the tunnel is applied to the anti-freezing structure of the drainage side ditch of the tunnel according to any one of claims 1 to 8, and is characterized by comprising the following steps:
acquiring temperature values in drainage side ditches longitudinally arranged at two sides of a tunnel;
and controlling the heat tracing plate to generate heat according to the temperature value, wherein the heat tracing plate is arranged on the inner wall of the side ditch of the drainage side close to one side of the side wall body of the track bed.
10. The method for preventing freezing of a tunnel gutter according to claim 9, wherein said step of obtaining a temperature value in said gutter is preceded by the step of:
and blocking the drainage holes by adopting a blocking plate, wherein the drainage holes longitudinally extend from the drainage side ditch to the side wall body of the ballast bed at intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011644079.3A CN112709601A (en) | 2020-12-31 | 2020-12-31 | Anti-freezing structure and method for tunnel drainage side ditch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011644079.3A CN112709601A (en) | 2020-12-31 | 2020-12-31 | Anti-freezing structure and method for tunnel drainage side ditch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112709601A true CN112709601A (en) | 2021-04-27 |
Family
ID=75548066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011644079.3A Pending CN112709601A (en) | 2020-12-31 | 2020-12-31 | Anti-freezing structure and method for tunnel drainage side ditch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112709601A (en) |
-
2020
- 2020-12-31 CN CN202011644079.3A patent/CN112709601A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Lai et al. | Freeze-proof method and test verification of a cold region tunnel employing electric heat tracing | |
| CN102996178B (en) | A kind of drainage system of tunnel in cold regions | |
| CN205259061U (en) | Ice -melt snow bridge deck pavement structural layer | |
| CN109209449B (en) | Intelligent heat preservation system for railway tunnel in cold region and control method thereof | |
| CN108316081A (en) | A kind of temperature and humidity control system for frozen ground regions road structure | |
| CN203113219U (en) | Highway bridge capable of preventing freeze and accumulated snow through solar energy | |
| CN102322276A (en) | Tunneling engineering freeze-proofing structure in seasonally frozen ground region | |
| CN206429272U (en) | A kind of tunnel in cold area Intelligent anti-freezing drainage system | |
| KR20150009795A (en) | Snow melting apparatus on paved road and installing mehod thereof | |
| CN106702850A (en) | Anti-freezing road capable of preventing road surface from being frozen and construction method of anti-freezing road | |
| CN202124819U (en) | Highway bridge preventing icing and snow accumulating | |
| CN206429255U (en) | A kind of tunnel in cold area Portal Section heat-preserving anti-freezing system | |
| CN202131554U (en) | Active heat-insulation antiskid facility for road surfaces | |
| CN208534539U (en) | One kind can maintenance type drainage heating system for seasonal Layers In Cold-area Tunnels | |
| CN214787536U (en) | Anti-freezing structure of tunnel drainage side ditch | |
| CN102322011B (en) | Active pavement thermal insulation anti-skid facility and construction method thereof | |
| CN112709601A (en) | Anti-freezing structure and method for tunnel drainage side ditch | |
| CN210368992U (en) | Anti-frost-heaving thermal insulation structure layer and drainage system for high-slope rock mass in severe cold region | |
| CN205223790U (en) | Heating of outdoor road surface or heat sink | |
| CN202250107U (en) | Tunneling anti-freezing structure in seasonally frozen ground district | |
| CN108103887B (en) | A kind of electric heating ice-melt snow pavement structure and its construction method | |
| KR20140110310A (en) | electric heating plate for antifreeze | |
| CN205686379U (en) | A kind of carwash pool structure for cold district job site | |
| CN208219327U (en) | A kind of temperature and humidity control system for frozen ground regions road structure | |
| CN104179513B (en) | A kind of construction method of tunnel in cold area hole external thermal insulation outlet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |