CN216551390U - Composite roadbed based on heat bar insulation board and slab stone - Google Patents
Composite roadbed based on heat bar insulation board and slab stone Download PDFInfo
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- CN216551390U CN216551390U CN202123132857.3U CN202123132857U CN216551390U CN 216551390 U CN216551390 U CN 216551390U CN 202123132857 U CN202123132857 U CN 202123132857U CN 216551390 U CN216551390 U CN 216551390U
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- 239000004575 stone Substances 0.000 title claims abstract description 47
- 239000002131 composite material Substances 0.000 title claims abstract description 30
- 238000009413 insulation Methods 0.000 title claims abstract description 27
- 239000002689 soil Substances 0.000 claims abstract description 82
- 239000000945 filler Substances 0.000 claims abstract description 11
- 239000004746 geotextile Substances 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 238000009833 condensation Methods 0.000 claims description 7
- 230000005494 condensation Effects 0.000 claims description 7
- 238000001704 evaporation Methods 0.000 claims description 6
- 230000008020 evaporation Effects 0.000 claims description 6
- 238000013500 data storage Methods 0.000 claims description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 15
- 238000010276 construction Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 6
- 238000004321 preservation Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 201000010099 disease Diseases 0.000 description 4
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 239000004744 fabric Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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Abstract
The utility model belongs to the technical field of roadbed structures, and discloses a composite roadbed based on a heat-bar insulation board and a piece of stone, which comprises a roadbed main body and a plurality of heat bars arranged on two sides of the roadbed main body; the roadbed main body comprises a frozen soil foundation, and a gravel lower cushion layer, a blocky stone layer, a gravel layer, a permeable geotextile, a gravel upper cushion layer and roadbed fillers which are sequentially laid on the frozen soil foundation in a laminated manner; an XPS insulation board is laid in the roadbed filling; the heat bars are vertically buried in the frozen soil foundation, and are arranged at equal intervals along the longitudinal extension direction of the roadbed main body. When the stone slab, the XPS heat-insulation plate and the hot rod of the utility model exert the cooling function, no external power facility is needed, no pollution is caused, and the fragile ecological environment of the plateau can be effectively protected.
Description
Technical Field
The utility model relates to the technical field of roadbed structures, in particular to a composite roadbed based on a heat-bar insulation board and a piece stone.
Background
China has wide distribution of permafrost, and is mainly distributed in Qinghai-Tibet plateau, northeast China, Xiaoxingan mountain, northern of Songnen plain and western mountain. In recent years, permafrost has been degraded seriously under the influence of human engineering activities such as global warming and road construction. After the frozen soil is melted, the bearing capacity is greatly reduced, the stability of the roadbed is seriously influenced, series of diseases such as cracks, uneven settlement, wavy edges and the like are induced to the highway, the maintenance cost of the road is increased, the service life of the road is shortened, the driving safety is threatened, and the normal operation of the highway in a permafrost region is seriously influenced.
The main protection method of the frozen soil roadbed in the existing frozen soil area comprises a series of engineering measures of a thermal insulation material roadbed, a block stone roadbed, increase of roadbed height and the like. However, a single engineering measure has a limited effect in protecting frozen soil and improving road stability, for example, paving a heat insulation material on the upper part of a roadbed can reduce the heat transfer from the top of the roadbed to the lower part and reduce the heat accumulation of the soil body of the roadbed, but can not eliminate the redundant heat of the frozen soil layer; the block stone roadbed can better dissipate heat accumulated at the lower part of the roadbed, but cannot prevent the atmospheric heat from being transferred to the roadbed top and cannot reduce the ground temperature of a frozen soil layer; the heat transfer thermal resistance can be increased by increasing the height of the roadbed, but the yin-yang slope effect inside the roadbed is aggravated, and the uneven settlement deformation of the roadbed still cannot be effectively reduced. In order to better protect frozen soil, reduce the ground temperature of a frozen soil layer and improve the stability of a roadbed in a frozen soil area, on the basis of analyzing measures and advantages, a composite roadbed structure based on a hot rod heat-insulation plate and flaky stones is provided, so that a better protection effect is achieved.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects in the prior art, the utility model provides a composite roadbed based on a hot rod heat insulation plate and a piece stone.
The utility model discloses a composite roadbed based on a heat-bar insulation board and a piece stone, which is realized by the following technical scheme:
a composite roadbed based on a hot rod heat insulation board and a piece of stone comprises a roadbed main body and a plurality of hot rods arranged on two sides of the roadbed main body;
the roadbed main body comprises a frozen soil foundation, and a gravel lower cushion layer, a blocky stone layer, a gravel layer, a permeable geotextile, a gravel upper cushion layer and roadbed fillers which are sequentially laid on the frozen soil foundation in a laminated manner;
an XPS insulation board is flatly laid in the water in the roadbed filler;
the heat bars are vertically buried in the frozen soil foundation, and are arranged at equal intervals along the longitudinal extension direction of the roadbed main body.
The roadbed further comprises a plurality of power supply and temperature collection systems, wherein the power supply and temperature collection systems are arranged at equal intervals along the longitudinal extension direction of the roadbed main body;
each power supply and temperature collection system comprises a power supply system and a temperature collection device, and the temperature collection device is electrically connected with the power supply system; the power supply system comprises a solar panel, a support column and a power supply box;
the solar panel is connected with the power supply box through the support;
the temperature acquisition device includes:
the automatic temperature recorder is electrically connected with the power supply box through a conducting wire, so that the continuity and the accuracy of data recording are ensured;
the data storage is electrically connected with the automatic temperature recorder;
and the temperature sensors are respectively buried in the frozen soil foundation and are respectively electrically connected with the automatic temperature recorder through data acquisition lines.
Further, the model of the automatic temperature recorder is LU-C3000.
Further, the data storage is a USB flash disk.
Further, the temperature acquisition device comprises a temperature sensor A, a temperature sensor B, a temperature sensor C, a temperature sensor A1, a temperature sensor B1 and a temperature sensor C1;
the temperature sensor A, the temperature sensor B and the temperature sensor C are buried along the same vertical direction; the temperature sensor A is buried on the center line of the cross section of the roadbed main body and is used for collecting the temperature of a roadbed soil body, and the sensor B, C is used for collecting the temperature of a frozen soil foundation below the center of the roadbed;
the temperature sensor A1 is buried in the frozen soil foundation and is positioned at the same horizontal height with the temperature sensor A;
the temperature sensor B1 is buried in the frozen soil foundation and is positioned at the same horizontal height with the temperature sensor B;
the temperature sensor C1 is buried in the frozen soil foundation and is located at the same level as the temperature sensor C.
Further, the temperature sensor A is buried on the center line of the cross section of the roadbed filling;
the temperature sensor a1 is buried in the frozen earth ground.
Further, the hot rod comprises a steel pipe, the steel pipe is a closed vacuum-pumping steel pipe, and liquid ammonia is filled in the steel pipe.
Furthermore, the rod body structure of the hot rod sequentially comprises a lower evaporation section, a middle heat insulation section and an upper condensation section along the length direction of the hot rod;
the lower evaporation section of the hot rod is embedded in the frozen soil layer;
and the upper condensation section of the hot rod is provided with a radiating fin and is placed in the atmosphere.
Further, the thickness of the bottom layer of the gravel is 25-35 cm.
Further, the thickness of the tablet stone layer is 0.8-1.5 m; and the block stone layer is formed by block stones with the grain sizes of 15-35 cm and the void ratio of 25% -40%, and the grain sizes and the void ratio are used for ensuring a good ventilation effect of the block stone layer.
Further, the thickness of the crushed stone layer is 20-30 cm; and the rubble layer that the rubble layer is 5 ~ 10cm by the particle diameter constitutes for prevent that the bed course from permeating the piece stone layer influence ventilation effect on the gravel.
Furthermore, the thickness of the XPS insulation board is 50-75 mm.
Further, the XPS heated board is formed by a plurality of heat preservation plate concatenations, and adjacent two pass through U type needle seamless connection between the heat preservation plate.
Further, the power of the solar panel is more than 150W.
Further, the power box provides 24V direct current power.
Further, the data memory is a U disk.
Further, the memory of the U disk is more than 1G.
Compared with the prior art, the utility model has the following beneficial effects:
the composite roadbed comprises the roadbed main body and the plurality of hot rods, the hot rods are arranged on two sides of the slope toe of the roadbed main body, the bottom end of each hot rod is buried in the frozen soil foundation, heat in the frozen soil foundation is dissipated through the hot rods, the influence of temperature on the frozen soil foundation is reduced, and therefore stability of the roadbed structure is improved. The roadbed main body of the embodiment comprises a frozen soil foundation, and a gravel lower cushion layer, a blocky stone layer, a gravel layer, permeable geotextile, a gravel upper cushion layer and roadbed fillers which are sequentially paved on the frozen soil foundation in a laminated manner; wherein the coefficient of heat conductivity of piecemeal stone layer 5 can change along with ambient temperature's change thereupon, and in the cold season, the coefficient of heat conductivity of piecemeal stone layer is great, and in the warm season, the coefficient of heat conductivity is less, can play the regulation and control effect all the year round to realized the temperature heat preservation effect to this embodiment road bed main part, reduced the road bed main part because of the possibility that the impaired condition of temperature variation takes place. And the XPS heated board has been laid in the road bed filler of this embodiment, XPS heated board and road bed filler top surface parallel arrangement, the XPS heated board of this embodiment has big thermal resistance, can effectively reduce the heat and to road bed base top and frozen soil foundation transmission, reduce the artificial upper limit degree of depth of frozen soil under the road bed to the stability of the compound road bed's of this embodiment structure has been improved, showing and having reduced the emergence of multiple frozen soil diseases such as the vertical crack of road bed, uneven settlement, melt and sink, improved the protection to frozen soil foundation 5.
The composite roadbed plays a role in protecting the frozen soil in multiple dimensions in the aspects of reducing heat transfer to a roadbed base top soil body, dissipating heat accumulated in the roadbed, reducing the ground temperature of a frozen soil layer and the like through the synergistic effect of the block stones, the heat insulation boards and the heat bars, and furthest ensures the frozen state of the frozen soil and the stability of the roadbed from the overall and system angles.
The utility model has simple structure, the main materials are roadbed filling, block stone, gravel, broken stone, permeable geotextile, XPS insulation board and hot rod, the material source is wide, and the construction is convenient. After being purchased, the materials such as the stone blocks, the gravel, the broken stone, the geotextile and the like can be directly transported to a construction site for construction, and the XPS heat-insulating plate and the hot rod can be preset to a manufacturer in advance and transported to the construction site to be buried to the design depth as required. The construction process can not generate large manual disturbance to the frozen soil, and meets the special requirement of engineering stability in frozen soil areas.
The roadbed temperature automatic acquisition system can fully utilize abundant solar energy in a plateau area to generate power, automatically acquire and store the temperature of roadbed soil bodies and frozen soil at different depths of the foundation, can be used for roadbed structure application effect analysis, frozen soil settlement monitoring and related scientific research work, and has great use value and significance.
When the stone slab, the XPS heat-insulation plate and the hot rod of the utility model exert the cooling function, no external power facility is needed, no pollution is caused, and the fragile ecological environment of the plateau can be effectively protected.
The roadbed structure disclosed by the utility model is reasonable in design, easy to construct and maintain, good in cooling effect and engineering stability, huge in market application space and better in application and popularization prospects.
Drawings
Fig. 1 is a schematic structural diagram of the composite roadbed of the utility model.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1, the present embodiment provides a composite roadbed based on a heat-bar insulation board and a slab stone, including a roadbed main body 15 and a plurality of heat bars 7, the present embodiment is implemented by disposing the heat bars 7 on both sides of a toe of the roadbed main body 15, and burying the bottom end of each heat bar 7 in a frozen soil foundation 8, so as to dissipate heat in the frozen soil foundation through the heat bars, thereby reducing the influence of temperature on the frozen soil foundation, and improving the stability of the roadbed structure of the present invention.
The roadbed main body 15 of the embodiment comprises a frozen soil foundation 8, and a gravel lower cushion layer 6, a blocky stone layer 5, a gravel layer 4, permeable geotextile, a gravel upper cushion layer 3 and roadbed fillers 2 which are sequentially laid on the frozen soil foundation 8 in a laminated manner; wherein the coefficient of heat conductivity of piecemeal stone layer 5 can change along with ambient temperature's change thereupon, and in the cold season, the coefficient of heat conductivity of piecemeal stone layer is great, and in the warm season, the coefficient of heat conductivity is less, can play the regulation and control effect all the year round to realized the temperature heat preservation effect to this embodiment road bed main part, reduced the road bed main part because of the possibility that the impaired condition of temperature variation takes place. And the XPS heated board 1 has been laid in the road bed filler 2 of this embodiment, XPS heated board 1 and 2 top surfaces parallel arrangement of road bed filler, the XPS heated board of this embodiment has big thermal resistance, can effectively reduce the heat and to road bed base top and frozen soil foundation transmission, reduce the artificial upper limit degree of depth of frozen soil under the road bed, thereby improved the stability of the structure of the compound road bed of this embodiment, showing and having reduced the emergence of multiple frozen soil diseases such as the longitudinal crack of road bed, uneven settlement, melt and sink, improved the protection to frozen soil foundation 5.
The composite roadbed of this embodiment is through piece stone, heated board and hot rod synergism for roadbed stability obtains improving by a wide margin, is showing the emergence that has reduced multiple frozen soil diseases such as the vertical crack of roadbed, uneven settlement, melt and sink.
The road bed simple structure of this embodiment, the essential material is road bed filler, piece stone, gravel, rubble, the geotechnological cloth that permeates water, XPS heated board and heat bar, and the material source is extensive, the construction of being convenient for. After being purchased, the materials such as the stone blocks, the gravel, the broken stone, the geotextile and the like can be directly transported to a construction site for construction, and the XPS heat-insulating plate and the hot rod can be preset to a manufacturer in advance and transported to the construction site to be buried to the design depth as required. The construction process can not generate large manual disturbance to the frozen soil, and meets the special requirement of engineering stability in frozen soil areas.
The heat bars 7 can effectively dissipate heat in the frozen soil foundation 8, and in another preferred embodiment of the utility model, the horizontal distance between each heat bar 7 and the slope toe of the roadbed main body 15 on the same side of the heat bar is 1-3 m; and a plurality of hot rod 7 of road bed main part 15's toe both sides all sets up with the equidistant interval of 3.0 ~ 4.0m along the longitudinal extension direction of road bed main part 15 to make the scope of action of hot rod 7 can effectively cover in the frozen soil region, and then guarantee to carry out effective dissipation through the heat of hot rod 7 in with frozen soil ground 8.
When the temperature of the composite roadbed is abnormal, in order to facilitate workers to find and process the temperature in time, in another preferable embodiment of the utility model, the composite roadbed further comprises a plurality of power supply temperature collection systems, the power supply temperature collection systems are arranged at equal intervals along the longitudinal extension direction of the roadbed main body, and the interval between two adjacent power supply temperature collection systems is 5-10 km, so that the density of data collection is met, and the economical efficiency of the temperature collection systems in the construction cost is considered, the temperature of the soil body of the composite roadbed of the embodiment is monitored through the power supply temperature collection systems, the workers can find and process the temperature in time when the temperature is abnormal, the problem treatment is effectively prevented from causing serious damage to the frozen soil foundation 8 in time, and the protection of the frozen soil foundation 8 is effectively improved.
Each power supply and temperature collection system of the embodiment comprises a power supply system and a temperature collection device, wherein the temperature collection device is electrically connected with the power supply system; the power supply system comprises a solar panel 13, a support column 12 and a power supply box 11; solar panel 13 passes through pillar 12 and is connected with power box 11, turns into the electric energy with solar energy through solar panel 13, and the electric energy transmits through pillar 12 and stores in power box 11, and power box 11 is used for the electric energy of storing wherein to supply power for temperature acquisition device to guarantee temperature acquisition device's normal work.
In order to realize monitoring the temperature of the soil body in the composite roadbed, the temperature acquisition device of the embodiment comprises:
the automatic temperature recorder 9 is electrically connected with the power supply box 11 through a conducting wire 14, and the data recording interval is 1 s-10 min, so that the continuity and the accuracy of data recording are ensured; the data storage 10 is electrically connected with the automatic temperature recorder 9; the temperature sensors are respectively embedded in the frozen soil foundation 8 and are respectively electrically connected with the automatic temperature recorder 9 through data acquisition lines 16; thereby realize monitoring the temperature of the compound road bed of this embodiment to make when the temperature is unusual, the staff can in time discover and handle, thereby effectively avoid the problem to handle untimely and cause serious damage to frozen soil foundation 8, thereby effectively improved the protection to frozen soil foundation 8.
In order to monitor the temperature of soil bodies in different areas of the composite roadbed and quickly find abnormal areas for timely processing, in another preferred embodiment of the utility model, the temperature acquisition device comprises a temperature sensor A, a temperature sensor B, a temperature sensor C, a temperature sensor A1, a temperature sensor B1 and a temperature sensor C1; the temperature sensor is used for acquiring the temperature of the roadbed and the foundation, comparing and analyzing the soil body of the composite roadbed and the ground temperature of the frozen soil layer inside and outside the structure influence range, and further analyzing the effect of the composite roadbed in frozen soil protection;
the temperature sensor A, the temperature sensor B and the temperature sensor C are buried along the same vertical direction; the temperature sensor A is buried on the center line of the cross section of the roadbed main body and is 0.3-0.8 m away from the bottom of the gravel underlayer, so that the temperature of a roadbed soil body is collected, and the temperature sensor A and the temperature sensor B are spaced by 2-3 m; the interval between the temperature sensor B and the temperature sensor C is 3-5 m, and the temperature sensor B and the temperature sensor C are used for acquiring the temperature of the frozen soil foundation below the center of the roadbed;
the temperature sensor A1 is buried in the frozen soil foundation 8 and is horizontally spaced from the right toe of the roadbed main body by 1-2 m; and is positioned at the same horizontal height with the temperature sensor A;
the temperature sensor B1 is buried in the frozen soil foundation 8 and is located at the same level as the temperature sensor B;
the temperature sensor C1 is buried in the frozen earth base 8 and is located at the same level as the temperature sensor C.
In order to ensure that the structure of the hot rod 7 can effectively dissipate the temperature in the frozen soil foundation 8, in another preferred embodiment of the utility model, the hot rod 7 comprises a steel pipe, the steel pipe is a closed vacuumized steel pipe, and the steel pipe is filled with liquid ammonia; the outer diameter of the tube shell of the hot rod 7 is 85-105 mm, and the thickness of the shell wall of the hot rod 7 is 15-20 mm.
In order to improve the structure of the hot rod 7 to dissipate the temperature in the frozen soil foundation 8, in another preferred embodiment of the utility model, the rod body structure of the hot rod 7 sequentially comprises a lower evaporation section, a middle heat insulation section and an upper condensation section of the hot rod 7 along the length direction of the rod body structure;
the length of the evaporation section at the lower part of the hot rod 7 is 6-8 m, and the hot rod is embedded in a frozen soil layer;
the length of the upper condensation section of the hot rod 7 is 3-5 m, and the upper condensation section is provided with radiating fins and is placed in the atmosphere.
In another preferred embodiment of the present invention, the gravel under-layer 6 has a thickness of 25cm to 35cm and is well graded.
In another preferred embodiment of the present invention, the thickness of the stone layer 5 is 0.8m to 1.5m and the gradation is good; and the blocky stone layer 5 is composed of blocky stones with the grain diameter of 15 cm-35 cm and the porosity of 25% -40% so as to ensure good ventilation effect of the blocky stone layer.
In another preferred embodiment of the present invention, the crushed stone layer 4 has a thickness of 20cm to 30cm and a good gradation, and the crushed stone layer 4 is made of crushed stones having a particle size of 5cm to 10cm for preventing the upper cushion of gravel from infiltrating into the stone layer and affecting the ventilation effect.
In another preferred embodiment of the utility model, the thickness of the gravel upper cushion layer 3 is 25cm to 35 cm.
In another preferred embodiment of the utility model, the plate thickness of the XPS heat-insulation plate is 50-75 mm, and the distance between the upper surface of the XPS heat-insulation plate and the top surface of the roadbed filling is 0.5-0.9 m; and the XPS heated board is formed by a plurality of heat preservation plates concatenation, and passes through U type needle seamless connection between two adjacent heat preservation plates.
It is to be understood that the above-described embodiments are only a few embodiments of the present invention, and not all 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.
Claims (10)
1. A composite roadbed based on a hot rod heat insulation board and a piece of stone is characterized by comprising a roadbed main body (15) and a plurality of hot rods (7) arranged on two sides of the roadbed main body (15);
the roadbed main body (15) comprises a frozen soil foundation (8), and a gravel lower cushion layer (6), a blocky stone layer (5), a gravel layer (4), a permeable geotextile, a gravel upper cushion layer (3) and a roadbed filler (2) which are sequentially laid on the frozen soil foundation (8) in a laminated manner;
an XPS heat insulation plate (1) is laid in the roadbed filling (2);
the roadbed main body (15) is characterized in that the heat bars (7) on two sides of the roadbed main body (15) are vertically buried in the frozen soil foundation (8), and the heat bars (7) are arranged at equal intervals along the longitudinal extension direction of the roadbed main body (15).
2. The composite roadbed according to claim 1, further comprising a plurality of power supply and temperature collection systems, wherein the plurality of power supply and temperature collection systems are arranged at equal intervals along the longitudinal extension direction of the roadbed main body (15);
each power supply and temperature collection system comprises a power supply system and a temperature collection device, and the temperature collection device is electrically connected with the power supply system; the power supply system comprises a solar panel (13), a support column (12) and a power supply box (11);
the solar panel (13) is connected with the power supply box (11) through the support column (12);
the temperature acquisition device includes:
the automatic temperature recorder (9) is electrically connected with the power supply box (11) through a conducting wire (14);
the data storage (10) is electrically connected with the automatic temperature recorder (9);
the temperature sensors are respectively buried in the frozen soil foundation (8) and are respectively electrically connected with the automatic temperature recorder (9) through data acquisition lines (16).
3. The composite roadbed of claim 2, wherein the temperature acquisition device comprises a temperature sensor A, a temperature sensor B, a temperature sensor C, a temperature sensor A1, a temperature sensor B1 and a temperature sensor C1;
the temperature sensor A, the temperature sensor B and the temperature sensor C are buried along the same vertical direction; the temperature sensor A is buried on the center line of the cross section of the roadbed main body (15);
the temperature sensor A1 is buried in a frozen soil foundation (8); and is positioned at the same horizontal height with the temperature sensor A;
the temperature sensor B1 is buried in a frozen soil foundation (8) and is positioned at the same horizontal height with the temperature sensor B;
the temperature sensor C1 is buried in the frozen soil foundation (8) and is positioned at the same level as the temperature sensor C.
4. The composite roadbed according to claim 1, wherein the hot bar (7) comprises a steel pipe, the steel pipe is a closed vacuum-pumping steel pipe, and the steel pipe is filled with liquid ammonia.
5. The composite roadbed according to claim 1, wherein the rod body structure of the hot rod (7) comprises a lower evaporation section, a middle heat insulation section and an upper condensation section in sequence along the length direction;
the lower evaporation section of the hot rod (7) is embedded in the frozen soil layer;
and the upper condensation section of the hot rod (7) is provided with a radiating fin and is placed in the atmosphere.
6. The composite subgrade according to claim 1, characterized in that the gravel underlayment (6) has a thickness of 25-35 cm;
the thickness of bed course (3) on the gravel is 25 ~ 35 cm.
7. The composite roadbed according to claim 1, wherein the thickness of the stone layer (5) is 0.8 to 1.5 m.
8. The composite roadbed according to claim 1, wherein the thickness of the gravel layer (4) is 20-30 cm.
9. The composite roadbed of claim 1, wherein the XPS insulation board has a board thickness of 50-75 mm.
10. The composite roadbed of claim 1, wherein the XPS insulation board is formed by splicing a plurality of insulation boards, and two adjacent insulation boards are connected seamlessly through U-shaped needles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123132857.3U CN216551390U (en) | 2021-12-14 | 2021-12-14 | Composite roadbed based on heat bar insulation board and slab stone |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123132857.3U CN216551390U (en) | 2021-12-14 | 2021-12-14 | Composite roadbed based on heat bar insulation board and slab stone |
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| CN216551390U true CN216551390U (en) | 2022-05-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115058932A (en) * | 2022-08-04 | 2022-09-16 | 北京市政路桥股份有限公司 | Roadbed for frozen earth road section and construction method thereof |
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- 2021-12-14 CN CN202123132857.3U patent/CN216551390U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115058932A (en) * | 2022-08-04 | 2022-09-16 | 北京市政路桥股份有限公司 | Roadbed for frozen earth road section and construction method thereof |
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