CN110055855B - Gravity type heat pipe anti-compression-torsion protection supporting frame, system and construction method - Google Patents
Gravity type heat pipe anti-compression-torsion protection supporting frame, system and construction method Download PDFInfo
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- CN110055855B CN110055855B CN201810051226.2A CN201810051226A CN110055855B CN 110055855 B CN110055855 B CN 110055855B CN 201810051226 A CN201810051226 A CN 201810051226A CN 110055855 B CN110055855 B CN 110055855B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/24—Methods or arrangements for preventing slipperiness or protecting against influences of the weather
- E01C11/26—Permanently installed heating or blowing devices ; Mounting thereof
- E01C11/265—Embedded electrical heating elements ; Mounting thereof
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Abstract
The invention discloses a gravity type heat pipe anti-compression-torsion protection support frame for highway snow melting, a gravity type heat pipe anti-compression-torsion protection support highway snow melting system and a construction method thereof. The gravity type heat pipe comprises a unidirectional heat conduction rubber sleeve for wrapping a gravity type heat pipe heat dissipation section and a protection steel plate, wherein the protection steel plate is connected with the unidirectional heat conduction rubber sleeve through a spring, heat conduction rubber is filled in the protection steel plate and the unidirectional heat conduction rubber sleeve, and one end of the protection steel plate is hinged with a fixing piece. The invention provides a high-efficiency protection device for protecting a road snow-melting and ice-melting heat pipe of a special road section of a highway; the protection steel plate can effectively protect the heat pipe from compression deformation, and can relieve the bending and torsion damage of the heat pipe; the heat conduction rubber and the spring can conduct heat to the protection steel plate, and meanwhile, the pressure energy is converted into potential energy of the spring; the unidirectional heat conduction heat pipe sleeve can collect heat of the heat pipe to the road surface layer, and improves the energy utilization efficiency of the heat pipe.
Description
Technical Field
The invention relates to a gravity type heat pipe anti-compression-torsion protection support frame, in particular to a gravity type heat pipe anti-compression-torsion protection support frame for highway snow melting, a gravity type heat pipe anti-compression-torsion protection support highway snow melting system and a construction method thereof.
Background
Ice and snow weather is an important factor for causing traffic accidents on highways, particularly large-scale rainy and snowy weather, which can cause large-scale traffic paralysis of expressway networks and cause huge economic loss. The ice and snow layer is very easy to form on the surface of the expressway in rainy and snowy weather, the friction coefficient of the automobile on the road surface is rapidly reduced, the maneuverability and braking effect of the automobile are poor, and finally the automobile is caused to slip and run away during running, so that serious traffic accidents are caused. In order to improve the current situation of snow melting and ice melting of the expressway, reduce secondary corrosion to the expressway and prolong the service life of the established expressway, a new heat pipe technology method for melting snow and ice needs to be adopted, and the heat pipe is generally buried in a shallow layer of the road surface and is obviously extruded, deformed and damaged on the road surface such as asphalt and the like under the action of vehicle load.
Disclosure of Invention
Aiming at the problems of various damages, including damages such as extrusion, bending and the like of the expressway when the heat pipe system for snow melting on the slope road section of the expressway is used in the use process, the invention aims to provide a gravity type heat pipe anti-compression-torsion protection support frame for snow melting on the expressway, a gravity type heat pipe anti-compression-torsion protection support highway snow melting system and a construction method thereof.
In order to achieve the above purpose, the present design adopts the following scheme:
the invention provides a gravity type heat pipe anti-torsion protection support frame, which comprises a unidirectional heat conduction rubber sleeve for wrapping a gravity type heat pipe heat dissipation section and a protection steel plate arranged in parallel with the unidirectional heat conduction rubber sleeve, wherein the protection steel plate is connected with the unidirectional heat conduction rubber sleeve through a spring, heat conduction rubber is filled in the protection steel plate and the unidirectional heat conduction rubber sleeve, and one end of the protection steel plate is hinged with a fixing piece for fixing.
Preferably, the gravity type heat pipe is buried under the road surface, and the heat dissipation section of the gravity type heat pipe is transversely arranged or obliquely arranged upwards.
Preferably, the protection steel plate is provided with a plurality of radiating fins.
Preferably, the fixing piece comprises a fixing steel bar, and a wedge-shaped fixing end is arranged at the lower end of the fixing steel bar.
Preferably, the fixing member is connected with the protection steel plate through a rotation shaft.
Preferably, the upper section of the unidirectional heat-conducting rubber wrapping sleeve is made of heat-conducting rubber, and the lower half section of the unidirectional heat-conducting rubber wrapping sleeve is made of heat-insulating rubber.
Another aspect of the present invention provides a gravity assisted heat pipe anti-compression and anti-torsion protection support highway snow melting system, comprising:
the highway comprises a road surface layer, a roadbed layer and a soil layer from top to bottom in sequence;
the gravity type heat pipe comprises an evaporation section, a heat insulation section and a heat dissipation section, wherein the evaporation section vertically penetrates into the soil layer, and the heat dissipation section transversely extends into the pavement layer;
above-mentioned gravity type heat pipe prevents pressing and turns round protection braced frame, one-way heat conduction rubber sleeve cover is located the radiating section, the protection steel sheet is located the upper end of one-way heat conduction rubber sleeve just is located the below on pavement layer surface, the mounting is fixed in the highway.
Preferably the fasteners extend downwardly through the substrate and into the soil layer.
As a further improvement, an electric heating net is adhered to the evaporation section of the gravity type heat pipe, the electric heating net is connected with a temperature sensor control node in series through a lead, and a connection power storage battery pack is formed when the temperature is below zero, so that the electrifying heating is realized.
The invention also provides a construction method of the gravity type heat pipe anti-compression torsion protection support highway snow melting system, which comprises the following steps:
(1) Calculating the effective snow melting working area of the gravity type heat pipes through the effective heat dissipation area of the gravity type heat pipes, and determining the distance between two adjacent rows of gravity type heat pipes;
(2) Drilling holes on the highway at the vertical section of the designated gravity type heat pipe, wherein the depths of the holes reach the geothermal constant temperature layer;
(3) Sleeving a unidirectional heat-conducting rubber sleeve on the horizontal section of the gravity type heat pipe, then placing the vertical section of the gravity type heat pipe in the drilled hole, and backfilling concrete to fix the gravity type heat pipe;
(4) The horizontal section of the gravity type heat pipe is placed on a steel bar bracket, so that breakage and damage are prevented;
(5) Backfilling the road base layer and the road surface layer, and ensuring the stability of the horizontal section of the heat pipe;
(6) And (3) debugging, namely determining that the functions are perfect, and keeping the temperature of the road surface to realize snow melting of the road surface.
The beneficial effects of the invention adopting the technical scheme are as follows:
1. the invention provides a high-efficiency protection device for protecting a road snow-melting and ice-melting heat pipe of a special road section of a highway;
2. the protection steel plate can effectively protect the heat pipe from compression deformation, and the bending and torsion damage of the heat pipe can be relieved by rotating around the shaft;
3. the heat conducting rubber and the placed spring can conduct heat to the protection steel plate and convert pressure energy into spring potential energy;
4. the unidirectional heat conduction heat pipe sleeve can collect heat of the heat pipe to the road surface layer, so that more heat of a heat dissipation section of the heat pipe is conducted to the road surface layer, and the energy utilization efficiency of the heat pipe is improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a cross-sectional view of a pavement surface according to the present invention;
FIG. 2 is a partial view of the protective frame of the present invention;
fig. 3 is a cross-sectional view of the protective frame of the present invention.
Wherein 1 is a wedge-shaped fixed end; 2 is a fixed steel bar; 3 is a rotation shaft; 4 is a radiating fin; 5 is a protective steel plate; 6 is heat conducting rubber; 7 is a spring; 8 is a unidirectional heat-conducting rubber sleeve; 9 is a gravity type heat pipe; 10 is a pavement layer; 11 is a roadbed layer; 12 is soil layer.
Detailed Description
Embodiments of the present invention are described in detail below, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
Example 1
A gravity type heat pipe anti-press-torsion protection support frame according to an embodiment of the present invention will be described with reference to fig. 1 to 3. The heat conducting rubber sleeve comprises a unidirectional heat conducting rubber sleeve 8, a protection steel plate 5, a spring 7, heat conducting rubber 6 and a fixing piece.
The unidirectional heat-conducting rubber sleeve 8 is tightly sleeved with the heat-conducting section of the gravity type heat pipe 9, the upper section of the wrapping sleeve is made of heat-conducting rubber, the lower half section of the wrapping sleeve is made of heat-insulating rubber, and heat of the heat-conducting section of the heat pipe is conducted to the heat-conducting rubber 6 in a concentrated mode along the upper section. The unidirectional heat-conducting rubber sleeve 8 is used for placing half of the heat-conducting rubber close to the pavement layer 10, so that heat of the heat pipe is gathered and conducted to the pavement layer 10. Meanwhile, the unidirectional heat-conducting rubber sleeve 8 wraps the heat-conducting section of the heat pipe tightly, so that heat of the heat-conducting section of the heat pipe is transferred to the road surface more, and heat is conducted to the protection steel plate 5 and the heat-radiating fin 4 plate through the heat-conducting rubber 6 to realize heat dissipation and snow melting.
The protection steel plate 5 is arranged in parallel or nearly in parallel with the length direction of the unidirectional heat conduction rubber sleeve 8. The two ends of the protection steel plate 5 are connected with the upper section of the unidirectional heat conduction rubber sleeve 8 through springs 7. The protection steel plate 5 and the unidirectional heat-conducting rubber sleeve 8 are filled with heat-conducting rubber. The unidirectional heat conduction wrap (unidirectional heat conduction rubber sleeve 8) is a protective sleeve of the heat pipe and conducts heat to the layer of the heat conduction rubber 6. The heat conducting rubber 6 is a heat conducting medium for protecting the steel plate 5 and the gravity type heat pipe 9. The heat conducting rubber 6 has compressibility, and can compress the volume under the guiding action of the spring 7, so that the rotation of the protection steel plate 5 is realized. The spring 7 is a protection buffer device for protecting the steel plate 5 when being rolled. The upper surface of the protection steel plate 5 is provided with a plurality of radiating fins 4 for increasing the heat exchange area and improving the heat utilization rate. The structure finally realizes the protection of the heat pipe from damage during operation, and increases the heat utilization rate.
The fixing piece comprises a rotating shaft 3, a fixing reinforcing steel bar 2 and a wedge-shaped fixing end 1. The rotating shaft 3 is connected with the protective steel plate 5 and can automatically rotate when the pavement is stressed by the compressive torsion force. The fixed steel bar 2 is connected with one end of the protection steel plate 5 through the rotating shaft 3, and the lower end of the fixed steel bar 2 is provided with a wedge-shaped fixed end 1. The rotating shaft 3 can enable the protection steel plate 5 to rotate under the action of moment, the steel plate is buffered by the spring 7 during rotation, the pressure on the gravity type heat pipe 9 is reduced, and the gravity type heat pipe 9 can be kept unchanged at an original position.
The gravity type heat pipe anti-torsion protection support frame is suitable for the snow melting of the expressway, and the unidirectional heat conduction rubber sleeve 8 tightly wraps the heat dissipation section of the gravity type heat pipe 9 buried below the road surface when the gravity type heat pipe anti-torsion protection support frame is used. In order to enlarge the heat dissipation area of the heat dissipation section to the pavement layer 10, the heat dissipation section is disposed transversely or obliquely upward.
The gravity type heat pipe anti-compression-torsion protection support frame mainly comprises an anti-compression-torsion independent control system and a unidirectional heat transfer system, realizes automatic rotation and pressure relief when the heat pipe is extruded by a vehicle on a shallow pavement and efficient utilization of heat of the heat pipe, prolongs the normal working service life of the heat pipe, improves the conversion rate of the heat pipe on heat energy utilization, and obviously enhances the snow melting effect of the heat pipe.
Example 2
A gravity assisted heat pipe anti-pinch protection support highway snow melt system according to an embodiment of the present invention, including a highway, a gravity assisted heat pipe 9, a gravity assisted heat pipe anti-pinch protection support frame of embodiment 1, is described below with reference to fig. 1-3.
The highway comprises a pavement layer 10, a pavement layer 11 and a soil layer 12 from top to bottom.
The gravity type heat pipe 9 (or ground temperature heat pipe) comprises an evaporation section, a heat insulation section and a heat dissipation section, wherein the evaporation section vertically penetrates into the soil layer 12, and the heat dissipation section transversely extends into the pavement layer 10. The heat pipe is internally vacuum sealed with liquid ammonia, freon and other low boiling point liquids, the evaporation section heats and evaporates the working medium into gas by absorbing heat, the gas rises to the heat dissipation section along the pipe, and the heat insulation section is used for preventing the evaporated gas in the heat pipe from exchanging heat with the pipe wall in the rising process.
The unidirectional heat-conducting rubber sleeve 8 of the gravity type heat pipe anti-compression-torsion protection support frame is tightly sleeved on the heat dissipation section, and half of the unidirectional heat-conducting rubber sleeve 8 is arranged close to the pavement layer 10, so that heat of the heat pipe is gathered and conducted to the pavement layer 10. The heat conducting rubber 6 is arranged between the wrapping sleeve and the protection steel plate 5, can convert the pressure under the action of the vehicle load into compression potential energy of the heat conducting rubber, and reduces the pressure action on the heat pipe. The spring 7 can realize the rotation control of the protection steel plate 5 on the plane of the rotation shaft 3. The protection steel plate 5 is located the upper end of one-way heat conduction rubber sleeve 8 and is located the below on road surface layer 10 surface, and the mounting is fixed in the highway.
Further, the fixing steel bars 2 in the fixing parts penetrate downwards through the road base layer 11, and the wedge-shaped fixing ends 1 are positioned in the soil layer 12.
When the heat dissipation section of the gravity type heat pipe 9 is arranged obliquely upwards, the protection steel plate 5 is also arranged obliquely upwards, and the rotating shaft 3 is connected with one end of the bottom of the protection steel plate 5, so that the high end of the protection steel plate 5 is subjected to larger pressure, and the protection steel plate 5 rotates around the rotating shaft 3. The protection steel plate 5 at one end of the fixing piece is prevented from being subjected to larger pressure, and the fixing state of the fixing piece and the highway is protected.
Further, an electric heating net (not shown) is attached to the evaporation section of the gravity type heat pipe 9, and is connected in series with the temperature sensor control node through a wire, and when the temperature is below zero, a connection power storage battery pack is formed, so that the electric heating is realized.
The embodiment provides an efficient protection device for protecting the road snow-melting and ice-melting heat pipe of a special road section of the expressway. The protection steel plate 5 can effectively protect the heat pipe from compression deformation, and the bending and torsion damage of the heat pipe can be relieved by rotating around the shaft; the heat conducting rubber 6 and the placed spring 7 can conduct heat to the protection steel plate 5, and meanwhile, the pressure energy is converted into potential energy of the spring 7; the unidirectional heat conduction heat pipe sleeve can collect heat of the heat pipe to the pavement layer 10, so that more heat of a heat dissipation section of the heat pipe is conducted to the pavement layer 10, and the energy utilization efficiency of the heat pipe is improved.
Example 3
The embodiment also discloses a construction method of the gravity assisted heat pipe anti-compression-torsion protection support highway snow melting system of the embodiment 2, wherein the gravity assisted heat pipe 9 comprises a vertical section and a horizontal section, the evaporation section is positioned below the vertical section, the heat dissipation section is positioned above the vertical section and the horizontal section, and the construction steps are as follows:
(1) Calculating the working area of effective snow melting of the gravity type heat pipes 9 (calculated by means of field test data) through the heat dissipation effective area of the heating heat pipes (the gravity type heat pipes 9), and determining the distance between two adjacent rows of gravity type heat pipes 9;
(2) Drilling holes on the highway at the vertical section of the designated gravity type heat pipe 9, wherein the holes are deep to the geothermal constant temperature layer;
(3) The unidirectional heat conduction rubber sleeve 8 is sleeved on the horizontal section of the gravity type heat pipe 9, then the vertical section of the gravity type heat pipe 9 is placed in the drilled hole, and the gravity type heat pipe 9 is fixed by backfilling concrete;
(4) The horizontal section of the gravity type heat pipe 9 is placed on a steel bar bracket (needing to be additionally added and not shown) to prevent the horizontal section from being broken and damaged;
(5) Backfilling the road base layer and the road surface layer, and ensuring the stability of the horizontal section of the heat pipe;
(6) The temperature sensor control node is embedded and connected in series with the electric heating network of the evaporation section of the gravity type heat pipe 9;
(7) Solar power generation panels and livestock power battery packs are arranged on the roadsides, so that battery storage of solar energy is realized;
(8) And the installation and assembly are completed, the solar and gravity type heat pipe 9 (geothermal heat pipe) is subjected to work debugging, the function is well determined, and the pavement temperature is kept to realize pavement snow melting.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (6)
1. The construction method of the gravity type heat pipe anti-compression torsion protection support highway snow melting system comprises the following steps:
the highway comprises a road surface layer, a roadbed layer and a soil layer from top to bottom in sequence;
the gravity type heat pipe comprises an evaporation section, a heat insulation section and a heat dissipation section, wherein the evaporation section vertically penetrates into the soil layer, and the heat dissipation section transversely extends into the pavement layer;
the gravity type heat pipe anti-compression torsion protection support frame comprises a unidirectional heat conduction rubber sleeve for wrapping a gravity type heat pipe heat dissipation section and a protection steel plate arranged in parallel with the unidirectional heat conduction rubber sleeve, wherein the protection steel plate is connected with the unidirectional heat conduction rubber sleeve through a spring, heat conduction rubber is filled in the protection steel plate and the unidirectional heat conduction rubber sleeve, and a fixing piece for fixing is hinged at one end of the protection steel plate;
the unidirectional heat-conducting rubber sleeve is sleeved on the heat dissipation section, the protection steel plate is positioned at the upper end of the unidirectional heat-conducting rubber sleeve and below the surface of the pavement layer, and the fixing piece is fixed in the highway; the method is characterized by comprising the following steps of:
(1) Calculating the effective snow melting working area of the gravity type heat pipes through the effective heat dissipation area of the gravity type heat pipes, and determining the distance between two adjacent rows of gravity type heat pipes;
(2) Drilling holes on the highway at the vertical section of the designated gravity type heat pipe, wherein the depths of the holes reach the geothermal constant temperature layer;
(3) Sleeving a unidirectional heat-conducting rubber sleeve on the horizontal section of the gravity type heat pipe, then placing the vertical section of the gravity type heat pipe in the drilled hole, and backfilling concrete to fix the gravity type heat pipe;
(4) The horizontal section of the gravity type heat pipe is placed on a steel bar bracket, so that breakage and damage are prevented;
(5) Backfilling the road base layer and the road surface layer, and ensuring the stability of the horizontal section of the heat pipe;
(6) And (3) debugging, namely determining that the functions are perfect, and keeping the temperature of the road surface to realize snow melting of the road surface.
2. The construction method of the gravity assisted heat pipe anti-torsion protection support highway snow melting system according to claim 1, wherein the gravity assisted heat pipe is buried under a highway pavement, and a heat dissipation section of the gravity assisted heat pipe is transversely or obliquely arranged.
3. The construction method of the gravity assisted heat pipe anti-torsion protection support highway snow melting system according to claim 1, wherein the protection steel plate is provided with a plurality of radiating fins.
4. The construction method of the gravity assisted heat pipe anti-torsion protection support highway snow melting system according to claim 1, wherein the fixing member is connected with the protection steel plate through a rotation shaft.
5. The construction method of the gravity assisted heat pipe anti-torsion protection support highway snow melting system according to claim 1, wherein the upper section of the unidirectional heat conducting rubber wrapping sleeve is made of heat conducting rubber, and the lower section of the unidirectional heat conducting rubber wrapping sleeve is made of heat insulating rubber.
6. The method of claim 1, wherein the fastener extends downwardly through the substrate and into the soil layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810051226.2A CN110055855B (en) | 2018-01-19 | 2018-01-19 | Gravity type heat pipe anti-compression-torsion protection supporting frame, system and construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810051226.2A CN110055855B (en) | 2018-01-19 | 2018-01-19 | Gravity type heat pipe anti-compression-torsion protection supporting frame, system and construction method |
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| CN110055855A CN110055855A (en) | 2019-07-26 |
| CN110055855B true CN110055855B (en) | 2023-05-09 |
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| CN114525709B (en) * | 2022-02-24 | 2024-05-17 | 湖南工程学院 | Device for road surface solar heat collection and energy storage and geothermal energy snow melting |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101260641A (en) * | 2008-04-17 | 2008-09-10 | 李克华 | Ground heating tube ice-melting method |
| CN104652266A (en) * | 2014-10-21 | 2015-05-27 | 陈黛丽 | Bridge deck anti-icing device |
| CN104711906A (en) * | 2013-12-17 | 2015-06-17 | 中铁工程设计咨询集团有限公司 | Rail beam ice and snow melting assembly, PC rail beam and laying method of PC rail beam |
| CN105040549A (en) * | 2015-08-24 | 2015-11-11 | 四川泉欣科技有限公司 | Method for preventing road from freezing |
| CN207846140U (en) * | 2018-01-19 | 2018-09-11 | 山东省交通规划设计院 | A kind of gravity type heat pipe torsion protection braced frame against pressure, system |
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2018
- 2018-01-19 CN CN201810051226.2A patent/CN110055855B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101260641A (en) * | 2008-04-17 | 2008-09-10 | 李克华 | Ground heating tube ice-melting method |
| CN104711906A (en) * | 2013-12-17 | 2015-06-17 | 中铁工程设计咨询集团有限公司 | Rail beam ice and snow melting assembly, PC rail beam and laying method of PC rail beam |
| CN104652266A (en) * | 2014-10-21 | 2015-05-27 | 陈黛丽 | Bridge deck anti-icing device |
| CN105040549A (en) * | 2015-08-24 | 2015-11-11 | 四川泉欣科技有限公司 | Method for preventing road from freezing |
| CN207846140U (en) * | 2018-01-19 | 2018-09-11 | 山东省交通规划设计院 | A kind of gravity type heat pipe torsion protection braced frame against pressure, system |
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Address after: 250031 No. 576 Wushanxi Road, Tianqiao District, Jinan City, Shandong Province Applicant after: Shandong transportation planning and Design Institute Co.,Ltd. Address before: No.576 WuYingShan Road, Tianqiao District, Jinan City, Shandong Province, 250031 Applicant before: SHANDONG PROVINCIAL COMMUNICATIONS PLANNING AND DESIGN INSTITUTE |
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Address after: 250031 No. 576 Wushanxi Road, Tianqiao District, Jinan City, Shandong Province Applicant after: Shandong transportation planning and Design Institute Group Co.,Ltd. Address before: 250031 No. 576 Wushanxi Road, Tianqiao District, Jinan City, Shandong Province Applicant before: Shandong transportation planning and Design Institute Co.,Ltd. Address after: 250031 No. 576 Wushanxi Road, Tianqiao District, Jinan City, Shandong Province Applicant after: Shandong transportation planning and Design Institute Co.,Ltd. Address before: 250031 No. 576 Wushanxi Road, Tianqiao District, Jinan City, Shandong Province Applicant before: SHANDONG PROVINCIAL COMMUNICATIONS PLANNING AND DESIGN INSTITUTE |
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Correction item: Applicant|Address Correct: SHANDONG PROVINCIAL COMMUNICATIONS PLANNING AND DESIGN INSTITUTE|250031 No. 576, Wuyingshan West Road, Tianqiao District, Jinan City, Shandong Province False: Shandong transportation planning and Design Institute Co.,Ltd.|250031 No. 576, Wuyingshan West Road, Tianqiao District, Jinan City, Shandong Province Number: 20-02 Volume: 37 |
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