CN110820470B - Assembly type ECC-photovoltaic power generation pavement structure and construction method - Google Patents
Assembly type ECC-photovoltaic power generation pavement structure and construction method Download PDFInfo
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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
- E01C9/00—Special pavings; Pavings for special parts of roads or airfields
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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
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
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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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G9/00—Installations of electric cables or lines in or on the ground or water
- H02G9/06—Installations of electric cables or lines in or on the ground or water in underground tubes or conduits; Tubes or conduits therefor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S30/00—Structural details of PV modules other than those related to light conversion
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
- H02S40/34—Electrical components comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The invention discloses an assembled ECC-cement concrete photovoltaic power generation pavement structure and a construction method, which at least comprise a roadbed, a base layer, a cement concrete surface layer and a photovoltaic power generation functional layer which are arranged from top to bottom in sequence; the photovoltaic power generation functional layer comprises a plurality of prefabricated plate units, each prefabricated plate unit consists of a plurality of photovoltaic modules and an ECC (error correction code) plate, the photovoltaic modules are connected in series and in parallel and then positioned at the top of the ECC plate, and the photovoltaic modules and the ECC plate are bonded together through a bonding material to form a whole; a constructional steel bar is arranged in the ECC board, and installation grooves for installing a necessary component junction box of the photovoltaic module and a photovoltaic module circuit are reserved in the ECC board; arranging temperature gaps between adjacent photovoltaic modules for deformation of the photovoltaic modules, and filling the temperature gaps with an elastic material; the adjacent prefabricated plate units are spliced or/and lapped together, and the lapping part is arranged on the ECC plate.
Description
Technical Field
The invention belongs to the field of photovoltaic power generation, and particularly relates to an assembled ECC-photovoltaic power generation pavement structure and a construction method.
Background
The photovoltaic power generation highway is a novel, energy-saving and environment-friendly road surface structure, combines a photovoltaic power generation project and a road project, realizes the basic requirement of road surface bearing, and simultaneously carries out cross fusion with the photovoltaic power generation industry, thereby realizing the interaction of energy and traffic information between vehicles and roads.
The bearing type photovoltaic power generation road has certain successful application in the world, realizes grid-connected power generation and obtains certain economic benefit. However, the development of the photovoltaic power generation highway has some problems to be further improved.
Firstly, the construction process of the photovoltaic power generation road is limited by construction technology and machinery, and no matter in the current road construction process of newly building a photovoltaic road or reconstructing the photovoltaic road from the existing road, the photovoltaic module is mainly laid by manual single blocks one by one, so that the defects of large workload, slow construction speed, difficult control of construction quality, difficult maintenance and the like in the later period of the photovoltaic power generation road exist in the construction process.
Secondly, the photovoltaic module needs to satisfy the demand that power generation function and road carried simultaneously, so the inner structure is very complicated and the cost is comparatively expensive, and current photovoltaic power generation module production technology is based on economic nature, luminousness and generating efficiency's consideration, compares in that conventional road surface structural layer photovoltaic module thickness is less and its inside material that has adopted the rigidity great (such as toughened glass, ya keli board etc.) as the protective layer. Therefore, the photovoltaic module is required to be guaranteed to have small deflection change under the action of wheel load in the structural design of the road surface, so that the internal battery plate is protected from being damaged, and the service life of the photovoltaic module is prolonged.
At present, the published patent (CN106592374A) has proposed the combined design of the photovoltaic power generation pavement structure. However, the patent still mainly focuses on laying a photovoltaic power generation layer on the existing conventional rigid and flexible pavement structure, and the redistribution of stress generated after the photovoltaic power generation layer is laid on the conventional pavement structure is not considered enough, so that the service life of the existing pavement structure after the photovoltaic power generation layer is laid on the pavement structure may be reduced, and the photovoltaic pavement construction dominated by the patent still is a mode of laying photovoltaic modules on site, and the problems in the construction aspect still exist.
Disclosure of Invention
Based on the research background, the invention provides a novel assembly type ECC-photovoltaic power generation pavement structure aiming at the defects of unreasonable stress of a structural layer, low efficiency and high difficulty in the construction, maintenance and repair processes of reconstructing a photovoltaic pavement and newly-built photovoltaic pavement of the existing pavement and the like of the existing photovoltaic power generation highway. The method aims to prefabricate the pavement plate unit formed by combining the photovoltaic module and the ECC in advance through a factory, and then improve the stress distribution of the pavement structure layer of the photovoltaic power generation highway by adopting a field assembly method, so that the construction speed of the photovoltaic power generation highway is improved, and the maintenance difficulty of the photovoltaic pavement in the later period is reduced. Thereby improving the service life and the economical efficiency of the photovoltaic power generation road.
The purpose of the invention can be realized by the following technical scheme:
in a first aspect, the invention provides an assembled ECC-cement concrete photovoltaic power generation pavement structure, which at least comprises a roadbed, a base layer, a cement concrete surface layer and a photovoltaic power generation functional layer which are sequentially arranged from bottom to top;
the photovoltaic power generation functional layer comprises prefabricated units, each prefabricated unit consists of a plurality of photovoltaic modules and an ECC (error correction code) plate, the photovoltaic modules are connected in series and in parallel and then positioned at the top of the ECC plate, and the photovoltaic modules and the ECC plate are bonded together through bonding materials to form a whole; the ECC board is internally provided with a constructional steel bar, and an installation groove for installing a necessary component junction box of the photovoltaic module and a connecting circuit between the photovoltaic modules is reserved in the ECC board; arranging a temperature gap between adjacent photovoltaic modules for deformation of the photovoltaic modules; filling the temperature slots with a more deformable elastomeric material; adjacent prefabricated plate block units are spliced or/and lapped together, the lapping part is arranged on an ECC (error correction code) plate, and the prefabricated plate units are not suitable for adopting a neat lapping mode because the prefabricated plate units are thin, load transmission cannot be carried out by the neat lapping, corner damage is easy to occur, and simultaneously, the neat lapping also easily causes the underwater seepage of a road surface, so that the water damage of a road surface structure is caused.
As a further technical scheme, adjacent prefabricated plate units are lapped together along the longitudinal direction of a road; or adjacent prefabricated panel units overlap together in the longitudinal and transverse directions of the road.
As a further technical scheme, temperature gaps are arranged at the overlapping positions of the adjacent prefabricated plate units and are filled with elastic materials.
As a further technical solution, adjacent prefabricated panel units are spliced together along the longitudinal direction of the road, or adjacent prefabricated panel units are spliced together along the longitudinal and transverse directions of the road.
As a further technical scheme, temperature gaps are arranged at the splicing positions of the adjacent prefabricated plate units and are filled with elastic materials.
As a further technical scheme, when the soil quality is poor, the roadbed is over-wet and other adverse conditions exist, a cushion layer can be arranged between the roadbed and the base layer, and the cushion layer can be made of graded broken stones or gravel;
as a further technical scheme, a subbase layer is arranged below the base layer, the subbase layer can be made of inorganic stabilized soil, graded broken stones or asphalt mixture, and can be set to be 18-20 cm.
As a further technical scheme, the concrete surface layer and the photovoltaic power generation functional layer are bonded through a bonding agent.
In a second aspect, the invention aims at the fabricated ECC-cement concrete photovoltaic power generation pavement structure and also discloses a construction method of the fabricated ECC-cement concrete photovoltaic power generation pavement structure.
(1) The construction method of the newly-built photovoltaic power generation pavement comprises the following steps:
step 1 prefabrication of prefabricated panel units
1-1, preparing an ECC material and stirring;
1-2, pouring an ECC material in a template prepared in advance, and removing the template to obtain an ECC plate after the performance requirement is met;
1-3, mounting the photovoltaic module, and completely bonding the photovoltaic material on the ECC board by using a bonding material, wherein a temperature seam is reserved when the photovoltaic module is mounted, and the temperature seam is densely filled by adopting a waterproof material with better elasticity.
1-4, installing a photovoltaic module junction box, and connecting a plurality of photovoltaic modules according to a circuit design.
and 4, after the construction of the concrete surface layer is finished, leveling the surface of the cement concrete layer, uniformly coating a binder on the surface of the cement concrete layer, and transporting the prefabricated plate unit to the site for installation.
And 5, the adjacent plate units are in a mutually overlapped mode, and are bonded with the cement concrete surface layer into a whole through the bonding agent to bear the load together. And when the plate units are lapped, the temperature gaps are reserved for dissipating deformation generated by temperature, and the temperature gaps are tightly filled by adopting a waterproof material with good elasticity.
As a further technical scheme, two rows of prefabricated plate units are symmetrically laid in the single lane, a wide pipeline ditch is reserved in the middle, the plate units in the same lane are connected according to circuit design, all lines are buried in the pipeline ditch, and the pipeline ditch is filled with waterproof materials with high strength to reach the road surface elevation.
As a further technical scheme, when the plate units are assembled, the height difference between the two leading plates is strictly controlled, and the flatness of the road surface meets the specification requirement. As mentioned above, the assembled ECC-cement concrete photovoltaic power generation pavement structure provided by the invention has the following beneficial effects:
the ECC material is superior to common road materials in strength, durability and deformation resistance, so that the structural bearing capacity of a road surface is guaranteed, reliable and stable support is provided for a photovoltaic panel layer, huge modulus difference between a photovoltaic module and a cement concrete surface layer can be transited, and damage caused by stress concentration of the photovoltaic module layer is avoided.
2. Through prefabricated photovoltaic panel and ECC plate unit, with photovoltaic module pre-installation on the ECC board, accomplish terminal box installation and line connection, not only can improve the efficiency of construction and the construction quality of road, can also realize the mechanized construction of large tracts of land, practice thrift manpower and time, improve economic nature.
3. Through set up the pipe junction box in the ECC layer, not only faster when laying, can play better guard action to the subassembly of photovoltaic module simultaneously, make its effect of keeping away from load and water, improve the life of electricity generation subassembly.
4. The ECC module of assembled ECC photovoltaic road surface can design according to different roads, makes its extensive highway that is applicable to all forms.
5. When a certain plate unit on the road surface is damaged and needs to be maintained, the plate unit is hoisted and transported away, a new plate unit is paved again and connected with other modules in a wiring mode, and the road can be repaired quickly.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Figure 1 is a partial schematic view of a panel unit.
FIG. 2 is a top view of an ECC board;
FIG. 3 is a longitudinal section view of a photovoltaic power generation highway single lane;
FIGS. 4(1), 4(2) are the prefabricated unit lap joint type;
FIG. 5 is a photovoltaic power plant layout;
in the figure: the photovoltaic power station comprises a photovoltaic module 1, an ECC (error correction code) plate 2, a rectangular groove of a junction box 3, a semicircular wire hole 4, a structural steel bar 5, a rectangular lap joint 6, a pipeline ditch 7, a prefabricated unit 8, a cement concrete surface layer 9, a base layer 10, a cushion layer 11, a roadbed 12 and a photovoltaic power station 13.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate correspondence with up, down, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
As introduced by the background art, the photovoltaic module mainly adopts a mode of manually laying single blocks one by one in the current pavement construction process, so that the defects of large workload, slow construction speed, difficult control of construction quality, difficult maintenance and the like in the later period of the photovoltaic power generation pavement exist in the construction process. The photovoltaic module is installed in large plates in advance by adopting a mode of prefabricating plate units in a factory, lines are connected in advance, then field hoisting construction is carried out to reduce field workload, and construction speed and construction quality are improved.
In addition, the photovoltaic module needs to satisfy the demand that power generation function and road carried simultaneously, so the inner structure is very complicated and the cost is comparatively expensive, and current photovoltaic module production technology is based on economic nature, luminousness and generating efficiency's consideration, compares in that conventional road surface structural layer photovoltaic module thickness is less and its inside material that has adopted the rigidity great (such as toughened glass, ya keli board etc.) is as the protective layer. Therefore, the photovoltaic module is required to be guaranteed to have small deflection change under the action of wheel load in the structural design of the road surface, so that the internal battery plate is protected from being damaged, and the service life of the photovoltaic module is prolonged. And an ultra-high toughness cement-based composite (Engineered cement Composites-ECC) is a high performance concrete. The method can convert the macro-cracking mode of a single crack of the traditional cement-based material under the bending and pulling load into the micro-cracking mode of a plurality of fine cracks, and has good crack control capability and durability. Therefore, the ECC is suitable for being used as a road surface structure layer material, can be used as a main bearing layer of a photovoltaic power generation road surface structure, and bears the compressive stress and the bending tensile stress generated by the vehicle load of the road surface. And the elastic modulus of ECC is comparatively close with the modulus of photovoltaic module, so ECC is used for photovoltaic power generation highway back, and the road surface structure can warp in coordination, and the stress distribution of structural layer also can be more reasonable.
Example 1
In a typical embodiment of the present application, as shown in fig. 1, fig. 2, and fig. 3, an assembled ECC-cement concrete photovoltaic power generation pavement structure at least includes, from bottom to top, sequentially: roadbed 12, base layer 10, surface layer 9 and photovoltaic power generation functional layer 8.
The roadbed 12 can be a soil roadbed which meets the regulations of 'highway roadbed design' (JDGD30) in China, and the roadbed is stable, compact and homogeneous and can provide uniform support for a road surface structure; all technical indexes of the construction method meet the regulations of the technical Specification for highway subgrade construction (JTJF10) in China.
The substrate 10 may be a cement stabilized aggregate, roller compacted concrete or lean concrete substrate having sufficient wash-out resistance and a certain stiffness. The design thickness of the concrete pavement structure is in accordance with the regulations of cement concrete pavement design specifications (JDGD40), and one layer or two layers can be arranged according to the requirements of road grade or traffic volume, and when the base layer is thicker, construction is carried out in two layers; the selection of the base material and the technical indexes thereof are in accordance with relevant specifications of China.
The surface layer is a cement concrete surface layer 9, is a main bearing layer of the pavement structure, bears vehicle load and provides stable support for the prefabricated photovoltaic module and the pavement plate unit combined by the ECC. To have sufficient strength and durability, the surface is flat. The design thickness of the cement concrete is in accordance with the design specification of road cement concrete pavement (JDGD40) in China, the thickness is generally between 15cm and 40cm, and the thickness is determined according to the road grade and the traffic volume; the material design can be according to the test specification of highway engineering cement and cement concrete (JTJE30), and each technical index of the material should accord with the specification of the highway cement concrete pavement construction technical specification (JTJF 30).
The photovoltaic power generation functional layer comprises a plurality of prefabricated plate units 8 and a pipeline ditch 7; as shown in fig. 1, the prefabricated unit is composed of a photovoltaic module 1 and an ECC panel 2.
The photovoltaic module 1 is made of a light-transmitting wear-resistant material, a solar panel, an insulating protective layer and the like. The light-transmitting wear-resistant material has good light-transmitting characteristic, ensures normal power generation of the solar cell panel wrapped inside the photovoltaic module, has anti-sliding wear-resistant characteristic, and has rough texture on the surface to ensure the normal running requirement of a vehicle. The texture depth and the skid resistance safety both meet the regulations of 'road bed and pavement on-site test regulations' (JTJ 059) in China.
As shown in fig. 2, the inside of the ECC board 2 is provided with two constructional steel bars 5 for protecting the board units from being damaged during assembly construction, and in fig. 2, the constructional steel bars 5 are divided into two transverse arrangements and two longitudinal arrangements; in actual engineering, the arrangement form and the number of the construction steel bars 5 are arranged according to the strength requirement of the pavement structure, and the higher the strength requirement is, the more the arrangement number of the construction steel bars 5 is, the lower the strength requirement is, and the less the arrangement number of the construction steel bars 5 is. Meanwhile, a rectangular groove 3 and a semicircular wire groove 4 are reserved in the ECC board and used for installing necessary component junction boxes of the photovoltaic modules and connecting series-parallel circuits among the photovoltaic modules; the specific rectangular groove 3 is used for installing a necessary component junction box, and the semicircular wire grooves 4 are used for installing lines connected between the photovoltaic modules.
Each prefabricated plate unit is composed of an ECC plate and a plurality of photovoltaic modules, and in the embodiment, the thickness of the ECC plate is 3-7cm and is as wide as the photovoltaic modules. The photovoltaic module and the ECC plate are bonded into a whole through a bonding material, the tensile strength of the bonding material is generally required to be more than 1Mpa, and the bonding material can be epoxy resin, polyurethane composite adhesive and the like. Temperature gaps are arranged among the photovoltaic modules, the width of each temperature gap can be designed to be 1-10mm, the temperature gaps are used for deformation of the photovoltaic modules, and the temperature gaps are filled with elastic materials with large deformation. Necessary junction boxes of the photovoltaic modules are installed in the rectangular grooves of the ECC board, and lines among the photovoltaic modules are laid in the rectangular grooves and connected with each other. And as shown in fig. 1, the bottom of the right side of the ECC sheet lacks a portion for overlapping between adjacent precast panel units.
The adjacent prefabricated plate unit plates adopt two connection forms shown in fig. 4(1) and 4(2), in particular, the connection form disclosed in fig. 4(1) is overlapped up and down, and is partially repeated; in fig. 4(2), the prefabricated plate units are spliced together, specifically, the side surface of one prefabricated plate unit is provided with a protrusion, the side surface of the other prefabricated plate unit is provided with a groove, and the groove and the protrusion are spliced together. The adjacent prefabricated plate units are mutually overlapped or spliced together, so that the load transmission can be ensured, the adjacent plates are stressed together, and the stress of the plate units is reduced. Meanwhile, the lap joint mode is favorable for reducing the road surface water entering into a concrete surface layer or a base layer, the water damage of the road surface structure is avoided as far as possible, and the durability of the road surface structure is improved. It should be noted that, no matter the lap joint part or the plug-in part, the side shape of the ECC plate is set, and the existing rectangle is still adopted in the shape of the photovoltaic module.
Furthermore, because the prefabricated units are of rectangular structures, the splicing or overlapping parts can be arranged only along the longitudinal direction of the road, or can be arranged along both the longitudinal direction and the transverse direction of the road, and are specifically arranged according to the strength requirement of the road surface. And the splicing or lapping modes can be used in a mixed way; a lap joint part is arranged on one surface of one prefabricated plate unit, and plug-in parts are arranged on the other surfaces; or the adjacent precast slab units of a certain section of road are overlapped, the adjacent precast slab units of a certain section of road are spliced, and the like, and the concrete setting is carried out according to the actual requirement.
Furthermore, when the prefabricated unit plates are lapped, a temperature gap is reserved, the width of the temperature gap can be designed to be 1-10mm, the temperature gap is used for deformation of the plate units, the temperature gap is filled with an elastic material with large deformation, and the deformation of the elastic material is selected according to actual needs.
Further, in fig. 5, four rows of prefabricated units are provided on the road along the longitudinal direction of the road (corresponding to the vehicle traveling direction in the drawing), pipe lines are provided between the first row and the second row along the vehicle traveling direction, and pipe lines are provided between the third row and the fourth row along the vehicle traveling direction; meanwhile, a pipeline ditch is arranged in the direction vertical to the running direction of the vehicle body, and materials with high strength and good waterproof performance are filled in the pipeline ditch to the height of the road sign, so that the composite requirement of the flatness of the road surface is met.
In order to ensure that the current generated by the photovoltaic power generation road surface can be normally supplied with power by surfing the internet, a photovoltaic power station 13 is required to be arranged at intervals, and the specific distance can be designed to be 1000-1500 m according to the requirement; the photovoltaic power station comprises a transformer, a switching station, a combiner box, an inverter and the like. As shown in fig. 5, the photovoltaic power station is built on the outer side of a road, the longitudinal pipeline ditches are used for collecting electric power generated by photovoltaic modules along the road, then the electric current generated in a certain range is collected through a transverse pipeline, and the electric current is converted through photovoltaic modules such as photovoltaic rectangles in the transverse pipeline and then is connected to the grid for use.
Example 2
The embodiment discloses a construction method based on the fabricated ECC-cement concrete photovoltaic power generation pavement structure disclosed in the embodiment 1, and the construction method specifically comprises the following steps:
the prefabrication of the prefabricated plate unit comprises the following specific steps:
(1) the materials were weighed according to the ECC mixing ratio shown in Table 1 below, and then added to a concrete mixer in sequence to be mixed uniformly. The stirring sequence is as follows: adding cement, fly ash, quartz sand and a thickening agent into a stirrer, dry-stirring for 3min, then adding water mixed with a water reducing agent in advance, stirring for 5min again, gradually adding PVA (polyvinyl acetate) fibers when the water reducing agent fully exerts the effect and the flowing property of slurry is good, and finishing the process within 6 min.
TABLE 1ECC mix ratio
(2) After the materials are uniformly stirred, the ECC is poured into a template which is prepared in advance, and in order to ensure that the size of the prefabricated ECC plate and the quality of the reserved rectangular groove and the reserved semicircular line hole are qualified, a steel test mold is used. Meanwhile, the ECC in the test mold is inserted and tamped for multiple times in the pouring process so as to ensure that the ECC plate is uniform and compact. After pouring is completed, fine trowelling is performed on the upper surface of the test piece, and a steel plate is placed at the top of the test mold to further process the top surface of the test mold, so that the top surface of the test piece is guaranteed to have very good flatness, and subsequent work can be smoothly performed.
(3) And (3) placing the test piece with the mold for 24h, then removing the steel mold, and continuously maintaining for 28 days under the appropriate temperature condition, wherein the surface of the test piece is covered with geotextile and water is sprayed periodically. The ECC material properties are shown in table 2.
TABLE 2ECC Material Properties
(4) And after the maintenance of the ECC board is finished, the photovoltaic module is installed, and the photovoltaic material is completely bonded on the ECC board by using the bonding material, so that the lower part of the photovoltaic module is not subjected to a void phenomenon, and the stress of the photovoltaic module is influenced. A temperature seam of 1-10mm is reserved during installation of the photovoltaic module, and the temperature seam is tightly filled with a waterproof material with good elasticity.
(5) And installing a photovoltaic module junction box, and connecting a plurality of photovoltaic modules according to the circuit design.
2. According to the structural design of the road surface, a roadbed and a base layer are paved on the proposed road.
The roadbed 12 can be a soil roadbed which meets the regulations of 'highway roadbed design' (JDGD30) in China, and the roadbed is stable, compact and homogeneous and can provide uniform support for a road surface structure; all technical indexes of the construction method meet the regulations of the technical Specification for highway subgrade construction (JTJF10) in China.
The substrate 10 may be a cement stabilized aggregate, roller compacted concrete or lean concrete substrate having sufficient wash-out resistance and a certain stiffness. The design thickness of the concrete pavement structure is in accordance with the regulations of cement concrete pavement design specifications (JDGD40), and one layer or two layers can be arranged according to the requirements of road grade or traffic volume, and when the base layer is thicker, construction is carried out in two layers; the selection of the base material and the technical indexes thereof are in accordance with relevant specifications of China.
3. And selecting the surface layer as a cement concrete layer according to the design requirements of the road, and paving and maintaining the cement concrete layer.
The surface course is cement concrete 9, is the main bearing layer of road surface structure, bears the vehicle load and provides stable support for the road surface plate unit of prefabricated photovoltaic module and ECC combination. To have sufficient strength and durability, the surface is flat. The design thickness of the cement concrete is in accordance with the design specification of road cement concrete pavement (JDGD40) in China, the thickness is generally between 15cm and 40cm, and the thickness is determined according to the road grade and the traffic volume; the material design can be according to the test specification of highway engineering cement and cement concrete (JTJE30), and each technical index of the material should accord with the specification of the highway cement concrete pavement construction technical specification (JTJF 30).
4. After the construction of the concrete surface layer is finished, the surface of the cement concrete layer is leveled, then a binder is uniformly coated on the surface of the cement concrete layer, the binder can be epoxy resin, polyurethane composite glue and the like, and the prefabricated plate units are transported to the site by a crane or other construction machinery for installation.
5. The adjacent plate units are spliced and overlapped with each other, and are bonded with the cement concrete surface layer into a whole through a bonding agent to bear the load together. When the plate units are lapped, a temperature gap of 1-10mm is reserved for dissipating deformation generated by temperature, and the size of the temperature gap depends on local temperature gradient and the length of the prefabricated unit plate. And the temperature gap is tightly filled by adopting a waterproof material with better elasticity.
7. Two rows of prefabricated plate units are symmetrically laid in a single lane, a pipeline ditch with the width of 15cm is reserved in the middle, the plate units in the same lane are connected according to circuit design, all circuits are buried in the pipeline ditch, and the pipeline ditch is filled with waterproof materials with high strength to reach the road surface elevation.
When the plate units are assembled, the height difference between the leading plates is strictly controlled, and the flatness of the road surface meets the standard requirement.
The assembled ECC-cement concrete photovoltaic power generation pavement structure provided by the invention can realize rapid construction of a pavement structure layer, the pavement structure layer is more stressed, and meanwhile, the protection of a pipeline trench and a junction box is enhanced, so that the photovoltaic pavement has better long-term service performance, and the service life of the photovoltaic pavement can be prolonged.
Example 3
According to embodiment 2, when the photovoltaic pavement is laid, and the pavement is damaged and needs to be repaired, the method comprises the following steps:
if the plate unit is damaged, the damaged plate can be taken down and replaced by a new plate unit when the road function or the power generation function is lost and the plate unit needs to be replaced, and the circuit connection at the position is recovered. The method comprises the following specific steps:
1. the plate unit prefabricating process is the same as that of example 1
2. The damaged plate units in the road are removed, taking care not to damage the connected circuits in the pipe trenches. The lower cement concrete layer can be leveled again by adopting materials such as mortar and the like.
3. And (3) conveying the plate units prefabricated in advance in a factory to a repair site, and bonding the plate units and the adjacent plate units into a whole by adopting a mutual lap joint mode and a cement concrete surface layer through a bonding agent. And (3) reserving a temperature gap of 5-10mm when the plate units are lapped, and tightly filling the temperature gap by adopting a waterproof material with good elasticity.
4. Restoring the connection between the plate unit pipeline and the adjacent plate pipeline.
5. Repairing damage to the pipe trench around the block unit.
6. And recovering the removed damaged board for inspection and carrying out subsequent repair for standby.
7. And opening traffic and normally communicating.
Example 4
The construction method for reconstructing the photovoltaic power generation pavement aiming at the existing cement concrete pavement comprises the following steps:
step 1 prefabrication of prefabricated panel units
1-1, preparing an ECC material and stirring;
1-2, pouring the ECC material in a template prepared in advance, and removing the template after the performance requirement is met to obtain the ECC material
An ECC board;
1-3, mounting the photovoltaic panel photovoltaic module, completely bonding the photovoltaic material on the ECC board by using a bonding material, reserving a temperature gap when mounting the photovoltaic panel photovoltaic module, and densely filling the temperature gap by using a waterproof material with better elasticity.
1-4 installing a photovoltaic panel photovoltaic module junction box, and connecting a plurality of photovoltaic panel photovoltaic modules according to a circuit design.
and 6, the adjacent plate units are overlapped with each other, and are bonded with the cement concrete surface layer into a whole through the bonding agent to bear the load together. And when the plate units are lapped, the temperature gaps are reserved for dissipating deformation generated by temperature, and the temperature gaps are tightly filled by adopting a waterproof material with good elasticity.
As a further technical scheme, two rows of prefabricated plate units are symmetrically laid in the single lane, a wide pipeline ditch is reserved in the middle, the plate units in the same lane are connected according to circuit design, all lines are buried in the pipeline ditch, and the pipeline ditch is filled with waterproof materials with high strength to reach the road surface elevation.
As a further technical scheme, when the plate units are assembled, the height difference between the two leading plates is strictly controlled, and the flatness of the road surface meets the specification requirement.
The assembled ECC-cement concrete photovoltaic power generation pavement structure provided by the invention can realize rapid repair after the pavement is damaged, so that the problem of inconvenient traffic caused by pavement maintenance can be reduced, other plates are slightly affected in the replacement process, and the construction difficulty is low, convenient and rapid.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. An assembled ECC-cement concrete photovoltaic power generation pavement structure is characterized by at least comprising a roadbed, a base layer, a cement concrete surface layer and a photovoltaic power generation functional layer which are sequentially arranged from bottom to top;
the photovoltaic power generation functional layer comprises a plurality of prefabricated plate units, each prefabricated plate unit consists of a plurality of photovoltaic modules and an ECC (error correction code) plate, the photovoltaic modules are connected in series and in parallel and then positioned at the top of the ECC plate, and the photovoltaic modules and the ECC plate are bonded together through a bonding material to form a whole; the ECC board is internally provided with a constructional steel bar, and an installation groove for installing a necessary component junction box and a photovoltaic module circuit of the photovoltaic module is reserved in the ECC board; temperature gaps are arranged between adjacent photovoltaic modules and between adjacent prefabricated plate units, and the temperature gaps are filled with elastic materials; the adjacent prefabricated plate units are spliced or/and lapped together, and the lapping part is arranged on the ECC plate.
2. The fabricated ECC-cement concrete photovoltaic generation pavement structure of claim 1, wherein adjacent prefabricated panel units are overlapped together along a longitudinal direction of a road; or adjacent prefabricated panel units overlap together in the longitudinal and transverse directions of the road.
3. The fabricated ECC-cement concrete photovoltaic pavement structure of claim 2, wherein the temperature gaps are formed at the overlapping positions of the adjacent prefabricated panel units, and the temperature gaps are filled with an elastic material.
4. The fabricated ECC-cement concrete photovoltaic pavement structure of claim 1, wherein adjacent prefabricated panel units are spliced together in a longitudinal direction of the roadway or spliced together in longitudinal and transverse directions of the roadway.
5. The fabricated ECC-cement concrete photovoltaic pavement structure of claim 4, wherein the adjacent prefabricated panel units are provided with temperature gaps at the splicing positions, and the temperature gaps are filled with elastic materials.
6. The fabricated ECC-cement concrete photovoltaic pavement structure of claim 1, wherein a portion of adjacent prefabricated panel units reserve a pipe chase for burying all pipes.
7. The fabricated ECC-cement concrete photovoltaic generation pavement structure of claim 1, wherein a cushion layer is disposed between the roadbed and the base layer when the fabricated ECC-cement concrete photovoltaic generation pavement structure is in unfavorable conditions of poor soil quality and over-wet roadbed, and the cushion layer can be made of graded broken stones or gravels.
8. The fabricated ECC-cement concrete photovoltaic generation pavement structure of claim 1, wherein a sub-base layer is disposed below the base layer.
9. The fabricated ECC-cement concrete photovoltaic pavement structure of claim 1, wherein the concrete surface layer is bonded to the photovoltaic functional layer by an adhesive.
10. The construction method of the fabricated ECC-cement concrete photovoltaic power generation pavement structure according to any one of claims 1 to 9, characterized by comprising the following steps:
step 1 prefabrication of prefabricated panel units
1-1, preparing an ECC material and stirring;
1-2, pouring an ECC material in a template prepared in advance, and removing the template to obtain an ECC plate after the performance requirement is met;
1-3, installing a photovoltaic module, wherein a bonding material is used for completely bonding a photovoltaic material on the ECC board, and when the photovoltaic module is installed, a temperature seam is reserved and is densely filled with a waterproof material with good elasticity;
1-4, installing a photovoltaic module junction box, and connecting a plurality of photovoltaic modules according to a circuit design;
step 2, paving a roadbed and a base layer on the road to be built according to the structural design of the road surface;
step 3, selecting a surface layer as a cement concrete layer according to the design requirements of the road, and paving and maintaining the cement concrete layer;
step 4, after the construction of the concrete surface layer is finished, leveling the surface of the cement concrete layer, uniformly coating a binder on the surface of the cement concrete layer, and transporting the prefabricated plate units to the site for installation;
and 5, the adjacent plate units are in a mutually overlapped mode, the adjacent plate units and the cement concrete surface layer are bonded into a whole through a bonding agent to bear load together, the temperature gaps are reserved for dissipating deformation generated by temperature when the plate units are overlapped, and the temperature gaps are densely filled by adopting a waterproof material with good elasticity.
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