CN110820470B - An assembled ECC-photovoltaic power generation pavement structure and construction method - Google Patents

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

An assembled ECC-photovoltaic power generation pavement structure and construction method

technical field

The invention belongs to the field of photovoltaic power generation, and in particular relates to an assembled ECC-photovoltaic power generation pavement structure and a construction method.

Background technique

Photovoltaic power generation highway is a new type of road structure that is energy-saving and environmentally friendly. It combines photovoltaic power generation engineering with road engineering, and integrates with the photovoltaic power generation industry while meeting the basic needs of the road surface, so as to realize the energy between vehicles and roads. and the interaction of traffic information.

The load-bearing photovoltaic power generation road has been successfully applied to a certain extent in the world, realizing grid-connected power generation and achieving certain economic benefits. However, there are still some problems in the development of photovoltaic power generation roads, which need to be further improved.

First of all, the construction of photovoltaic power generation roads is limited by construction technology and machinery. At present, no matter whether new photovoltaic pavements or existing highways are renovated to photovoltaic pavements, photovoltaic modules are mainly paved manually block by block. In the process, there are problems such as heavy workload, slow construction rate, difficult control of construction quality, and difficulty in maintenance and repair of photovoltaic power generation pavement in the later stage.

Secondly, the photovoltaic module needs to meet the needs of power generation function and road bearing at the same time, so the internal structure is extremely complex and the cost is relatively expensive. The existing photovoltaic power generation module production technology is based on the consideration of economy, light transmittance and power generation efficiency. Compared with The thickness of the photovoltaic module in the conventional pavement structure layer is small and the material with high rigidity (such as tempered glass, acrylic plate, etc.) is used as a protective layer inside. Therefore, in the design of the pavement structure, it is necessary to ensure that the photovoltaic module undergoes a small deflection change under the action of the wheel load to protect the internal cells from damage, thereby improving the service life of the photovoltaic module.

At present, the published patent (CN106592374A) has proposed the combined design of photovoltaic power generation pavement structure. However, this patent still mainly focuses on adding a photovoltaic power generation layer to the existing conventional rigid and flexible pavement structures. The stress redistribution generated after the conventional pavement structure is covered with a photovoltaic power generation layer is insufficiently considered, resulting in the existing pavement structure adding photovoltaic power generation layers. The service life after the power generation layer may be reduced, and the photovoltaic pavement construction led by this patent is still the way of laying photovoltaic modules on site, and the above-mentioned construction problems still exist.

SUMMARY OF THE INVENTION

Based on the above research background, the present invention proposes a new type of assembly for the problems of unreasonable stress on the structural layer existing in the existing photovoltaic power generation highway, reconstruction of photovoltaic pavement on existing pavement and construction of new photovoltaic pavement, low efficiency and difficulty in the maintenance and repair process, etc. ECC-PV pavement structure. The purpose is to prefabricate the pavement plate unit of the combination of photovoltaic modules and ECC in the factory, and then use the method of on-site assembly to improve the stress distribution of the pavement structure layer of the photovoltaic power generation highway, increase the construction speed, and reduce the maintenance difficulty of the photovoltaic pavement in the later stage. Thereby improving the service life and economy of photovoltaic power generation roads.

The object of the present invention can be realized through the following technical solutions:

In the first aspect, the present invention provides a prefabricated ECC-cement concrete photovoltaic power generation pavement structure, which at least includes a roadbed, a base layer, a cement concrete surface layer and a photovoltaic power generation functional layer sequentially arranged from bottom to top;

The photovoltaic power generation functional layer includes prefabricated units, each of the prefabricated units is composed of multiple photovoltaic modules and an ECC board, and the multiple photovoltaic modules are connected in series and parallel, and are located on the top of the ECC board. And the photovoltaic module and the ECC board are bonded together by bonding materials to form a whole; structural steel bars are arranged inside the ECC board, and the necessary component wiring for installing the photovoltaic module is reserved in the ECC board. The installation slot for the connection line between the box and the photovoltaic module; a temperature gap is set between adjacent photovoltaic modules for the deformation of the photovoltaic module; the temperature gap is filled with elastic material with large deformation; adjacent The prefabricated panel units are plugged or/and overlapped together, and the overlapped part is set on the ECC board. It should be noted that the prefabricated panel unit should not be in the form of lap joint, because the prefabricated panel unit is thin, and the lap joint cannot be used. During load transfer, corner damage is likely to occur, and at the same time, lap joints are also likely to cause surface water infiltration, resulting in water damage to the pavement structure.

As a further technical solution, along the longitudinal direction of the road, adjacent prefabricated plate units are overlapped together; or along the longitudinal and lateral directions of the road, adjacent prefabricated panel units are overlapped together.

As a further technical solution, temperature seams are set at the overlapping positions of adjacent prefabricated plate units, and the temperature seams are filled with elastic materials.

As a further technical solution, along the longitudinal direction of the road, adjacent prefabricated panel units are plugged together, or along the longitudinal and lateral directions of the road, adjacent prefabricated panel units are plugged together.

As a further technical solution, temperature seams are set at the insertion positions of the adjacent prefabricated panel units, and the temperature seams are filled with elastic materials.

As a further technical solution, when the soil quality is poor, the roadbed is too wet, and other unfavorable conditions, a cushion can be set between the subgrade and the base, and the cushion can be made of graded crushed stone or sand;

As a further technical solution, a sub-base is arranged below the base, and the sub-base can be made of inorganic stabilized soil, graded crushed stone or asphalt mixture, and can be set to 18cm-20cm.

As a further technical solution, the concrete surface layer and the photovoltaic power generation functional layer are bonded by an adhesive.

In the second aspect, the present invention also discloses a construction method of the assembled ECC-cement concrete photovoltaic power generation pavement structure for the above-mentioned assembled ECC-cement concrete photovoltaic power generation pavement structure.

(1) The construction method of a new photovoltaic power generation road surface includes the following steps:

Step 1 Prefabrication of prefabricated panel units

1-1 Configure ECC material and stir;

1-2 Pour the ECC material into the template prepared in advance. After meeting the performance requirements, remove the mold to obtain the ECC board;

1-3 Install the photovoltaic module, and use the bonding material to completely bond the photovoltaic material to the ECC board. When installing the photovoltaic module, reserve a temperature seam, and the temperature seam is filled with waterproof and elastic materials.

1-4 Install the photovoltaic module junction box, and connect several photovoltaic modules according to the circuit design.

Step 2. According to the pavement structure design, lay the subgrade and base layer on the proposed road;

Step 3 According to the road design requirements, select the surface layer as a cement concrete layer and perform paving and maintenance;

Step 4 After the construction of the concrete surface layer is completed, the surface of the cement concrete layer is leveled, and then the adhesive is evenly spread on the surface, and the prefabricated plate unit is transported to the site for installation work.

Step 5 Adjacent plate units are in the form of overlapping each other, and are bonded to the cement concrete surface layer through the adhesive to form a whole to bear the load together. When the plate units are overlapped, a temperature seam is reserved to dissipate the deformation caused by the temperature, and the temperature seam is filled and dense with a waterproof and better elastic material.

As a further technical solution, two rows of prefabricated plate units are symmetrically laid in the single lane, with wide pipeline trenches left in the middle, the adjacent plate units are connected according to the circuit design, and all the lines are buried in the pipeline trenches. The high waterproof material is poured into the pipeline trench to the road elevation.

As a further technical solution, when assembling the plate unit, the height difference between the adjacent plates should be strictly controlled, and the smoothness of the road surface should meet the specification requirements. As mentioned above, the assembled ECC-cement concrete photovoltaic power generation pavement structure provided by the present invention has the following beneficial effects:

1. The strength, durability and deformation resistance of ECC materials are better than those of common road materials, thus ensuring the structural bearing capacity of the road surface, providing reliable and stable support for the photovoltaic panel layer, and being able to transition between photovoltaic modules and cement. The huge difference in modulus between the concrete surface layers prevents the photovoltaic module layer from being damaged due to stress concentration.

2. Through prefabricated photovoltaic panels and ECC plate units, the photovoltaic modules are pre-installed on the ECC plate, and the junction box installation and line connection are completed, which can not only improve the construction efficiency and construction quality of the road, but also realize large-scale mechanized construction and save money. Manpower and time, improve economy.

3. By setting the pipe junction box in the ECC layer, it is not only faster when laying, but also can better protect the components of the photovoltaic module, keep it away from the effect of load and water, and improve the use of power generation components life.

4. The ECC module of the assembled ECC photovoltaic pavement can be designed according to different roads, making it widely applicable to all types of roads.

5. When a certain plate unit on the road needs to be repaired, it is only necessary to hoist the plate unit away, re-pave a new plate unit and connect it with other modules, so that the road can be quickly repaired.

Description of drawings

The accompanying drawings that form a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute improper limitations on the present application.

Figure 1 is a partial schematic diagram of the plate unit.

Figure 2 is a top view of the ECC board;

Figure 3 is a longitudinal section of a single lane of a photovoltaic power generation highway;

Figure 4 (1), Figure 4 (2) are the prefabricated unit overlapping form;

Figure 5 is a layout diagram of a photovoltaic power station;

In the picture: 1 photovoltaic module, 2 ECC board, 3 rectangular groove for installation of junction box, 4 semi-circular wire hole, 5 structural steel bar, 6 rectangular overlap, 7 pipeline trench, 8 prefabricated unit, 9 cement concrete surface layer , 10 base layers, 11 cushion layers, 12 roadbeds, 13 photovoltaic power stations.

Detailed ways

It should be noted that the following detailed description is exemplary and intended to provide further explanation of the application. Unless otherwise defined, 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 should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and/or "including" are used in this specification, it indicates that the presence of features, steps, operations, devices, components and/or combinations thereof;

For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, it only means that the directions of up, down, left and right are consistent with the drawings themselves, and do not limit the structure. It is for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

As described in the background art, in the current pavement construction process, the photovoltaic modules are mainly laid manually, block by block, resulting in a large workload, slow construction speed, difficult control of construction quality, and photovoltaic power generation during the construction process. The maintenance of the road in the later stage is difficult and other deficiencies. To solve this problem, we can install multiple photovoltaic modules in large plates in advance by using factory prefabricated plate units, connect the lines in advance, and then carry out on-site hoisting construction to reduce on-site workload and improve construction speed and construction. quality.

In addition, photovoltaic modules need to meet the needs of power generation and road bearing at the same time, so the internal structure is extremely complex and the cost is relatively expensive. The existing photovoltaic module production technology is based on the consideration of economy, light transmittance and power generation efficiency. Compared with Conventional pavement structural layer photovoltaic modules have a small thickness and use materials with greater rigidity (such as tempered glass, acrylic panels, etc.) inside as a protective layer. Therefore, in the design of the pavement structure, it is necessary to ensure that the photovoltaic module undergoes a small deflection change under the action of the wheel load to protect the internal cells from damage, thereby improving the service life of the photovoltaic module. The ultra-high toughness cementitious composites (Engineered Cementitious Composites-ECC) is a high-performance concrete. It can transform the macroscopic cracking mode of a single crack of traditional cement-based materials into a microscopic cracking mode of multiple fine cracks under flexural and tensile loads, with good crack control ability and durability. Therefore, ECC is suitable as a pavement structural layer material, and can be used as the main bearing layer of the photovoltaic power generation pavement structure to bear the compressive stress and bending tensile stress generated by the vehicle load on the pavement. And the elastic modulus of ECC is relatively close to that of photovoltaic modules, so after ECC is used in photovoltaic power generation roads, the pavement structure can be deformed cooperatively, and the stress distribution of the structural layer will be more reasonable.

Example 1

In a typical embodiment of the present application, as shown in FIG. 1 , FIG. 2 , and FIG. 3 , a prefabricated ECC-cement concrete photovoltaic power generation pavement structure at least includes: roadbed 12 , base layer 10 , which are arranged in order from bottom to top. , surface layer 9 and photovoltaic power generation functional layer 8 .

The subgrade 12 can be an earth subgrade that meets the requirements of my country's "Highway Subgrade Design" (JDGD30). Technical Specifications for Subgrade Construction (JTJF10).

The base layer 10 may be cement stabilized granules, roller compacted concrete or lean concrete base layer, and should have sufficient anti-scour ability and certain rigidity. Its design thickness should conform to the "Code for Design of Cement Concrete Pavement" (JDGD40). Depending on the road grade or traffic volume, one or two layers can be set up. When the base layer is thicker, the construction is divided into two layers; the selection of the base material And its technical indicators should comply with the relevant regulations of our country.

The surface layer is a cement concrete surface layer 9, which is the main bearing layer of the pavement structure, bears the vehicle load and provides stable support for the pavement plate unit combined with the prefabricated photovoltaic module and ECC. To have sufficient strength and durability, the surface is flat. The design thickness of cement concrete should comply with my country's "Code for Design of Highway Cement Concrete Pavement" (JDGD40). and Cement Concrete Test Regulations" (JTJE30), and its technical indicators should comply with my country's "Technical Specifications for Highway Cement Concrete Pavement Construction" (JTJF30).

The photovoltaic power generation functional layer includes a plurality of prefabricated plate units 8 and pipeline trenches 7 ; as shown in FIG. 1 , the prefabricated unit is composed of two parts, a photovoltaic module 1 and an ECC board 2 .

The photovoltaic module 1 is composed of light-transmitting and wear-resistant materials, solar cell panels, and insulating protective layers. The light-transmitting and wear-resistant material has good light-transmitting properties to ensure the normal power generation of the solar panels wrapped inside the photovoltaic module. At the same time, the material must have anti-slip and wear-resistant properties, and the surface has a rough texture to ensure the normal driving needs of the vehicle. Texture depth and anti-skid safety all meet the requirements of my country's "Regulations for Field Test of Highway Subgrade Pavement" (JTJ 059).

As shown in Figure 2, structural steel bars 5 are arranged inside the ECC board 2 to protect the plate unit from damage during assembly and construction. In Figure 2, the structural steel bars 5 are divided into horizontal and vertical settings, two horizontal and vertical. Two; in the actual project, the setting form and quantity of the structural steel bars 5 are set according to the strength requirements of the pavement structure. less. At the same time, a rectangular groove 3 and a semi-circular wire groove 4 are reserved in the ECC board for the installation of the junction box of the necessary components of the photovoltaic module and the series-parallel line connection between the photovoltaic modules; the specific rectangular groove 3 is used for In order to install the necessary component junction box, the semi-circular wire slot 4 is used to install the lines connected between the photovoltaic modules.

Each prefabricated plate unit is composed of one ECC plate and several photovoltaic modules. In this embodiment, the thickness of the ECC plate is 3-7 cm, which is the same width as the photovoltaic module. The photovoltaic module and the ECC board are bonded together by a bonding material. The tensile strength of the bonding material is generally required to be greater than 1Mpa. The bonding material can be epoxy resin, polyurethane composite adhesive, etc. A temperature gap is set between the photovoltaic modules, and the width of the temperature gap can be designed to be 1-10mm, which is used for the deformation of the photovoltaic module, and the temperature gap is filled with elastic materials with large deformation. The necessary junction boxes of the photovoltaic modules are installed in the rectangular grooves of the ECC board, and the lines between the photovoltaic modules are laid in the rectangular grooves and connected to each other. And as shown in Figure 1, the bottom part of the right side of the ECC board is missing a part, which is used for the overlap between adjacent prefabricated plate units.

Adjacent prefabricated unit panels adopt the two connection forms shown in Figure 4(1) and Figure 4(2). Specifically, the connection form disclosed in Figure 4(1) is overlapped up and down, and there are some repetitions. 4 (2) is to be plugged together, specifically, a protrusion is provided on the side of a prefabricated plate unit board, a groove is provided on the side of another prefabricated board unit, and the groove is inserted with the protrusion. together. The adjacent prefabricated plate units are overlapped or plugged together, which can ensure the transmission of the load, make the adjacent plates bear the force together, and reduce the stress of the plate unit. At the same time, the lap joint form is conducive to reducing the entry of road surface water into the concrete surface or base layer, avoiding water damage to the pavement structure as much as possible, and improving the durability of the pavement structure. However, it should be noted that both the overlapping part and the plug-in part are realized by setting the side shape of the ECC board, and the shape of the photovoltaic module still adopts the existing rectangle.

Further, since the prefabricated unit has a rectangular structure, its plug-in or overlapped part may be arranged only along the longitudinal direction of the road, or may be arranged along both the longitudinal and transverse directions of the road, depending on the strength of the road surface. Setup is required. And the plug connection or lap connection method can be used in combination; a lap part is set on one surface of a prefabricated panel unit, and a plug part is set on the other surface; or the lap connection between adjacent prefabricated panel units of a certain section of The connection between adjacent prefabricated board units of a certain section of road, etc., is specifically set according to actual needs.

Further, when the prefabricated unit panels are overlapped, a temperature seam should also be reserved. The width of the temperature seam can be designed to be 1-10mm, which is used for the deformation of the plate unit. The deformation size of the material is selected according to the actual needs.

Further, in FIG. 5 , along the longitudinal direction of the road (corresponding to the driving direction of the vehicle in the figure), four rows of prefabricated units are arranged on the road, and between the first row and the second row along the direction of the vehicle running Set up pipeline ditch, and set pipeline ditch between the third row and the fourth row along the direction of vehicle running; meanwhile, set up pipeline ditch in the direction perpendicular to the running direction of the vehicle body, and use the material with high strength and good waterproof performance in the pipeline ditch Fill to the elevation of the road sign to ensure the compound requirements of the smoothness of the road surface.

In order to ensure that the current generated by the photovoltaic power generation road can be powered on the grid normally, it is necessary to set up a photovoltaic power station 13 at intervals, and the specific distance can be designed as 1000m-1500m according to the needs; the photovoltaic power station consists of transformers, switch stations, combiner boxes, inverters etc. composition. As shown in Figure 5, the photovoltaic power station is built on the outside of the road, and the longitudinal pipeline trench is used to collect the electricity generated by the photovoltaic modules along the line, and then collect the current generated within a certain range through a horizontal pipeline, and pass the photovoltaic rectangle and other photovoltaic modules inside it. After the components are converted, they are connected to the grid for use.

Example 2

This embodiment discloses a construction method based on the fabricated ECC-cement concrete photovoltaic power generation pavement structure disclosed in Embodiment 1, as follows:

1 The specific steps for the prefabrication of the prefabricated plate unit are as follows:

(1) Various materials are weighed according to the following table 1 ECC mixing ratio, and then added to the concrete mixer and mixed evenly. The mixing sequence is: add cement, fly ash, quartz sand, and thickener to the mixer for dry mixing for 3 minutes, then add the water mixed with the water reducing agent in advance and stir again for 5 minutes, until the water reducing agent is fully effective and the slurry When the flow performance is good, the PVA fiber is gradually added, and the process is completed within 6 minutes.

Table 1 ECC mix ratio

(2) After the materials are evenly mixed, pour the ECC into the template prepared in advance. In order to ensure that the size of the prefabricated ECC board and the quality of the reserved rectangular grooves and semicircular holes are qualified, steel trial molds should be used. At the same time, during the pouring process, the ECC in the trial mold should be tamped several times to ensure that the ECC board is uniform and dense. After the pouring is completed, the upper surface of the test piece is carefully smoothed, and a steel plate is placed on the top of the test mold to further process the top surface of the test mold to ensure that the top surface of the test piece has a very good flatness so that the follow-up work can be carried out smoothly.

(3) Remove the steel mold after placing the test piece with the mold for 24 hours, and continue to maintain it for 28 days under suitable temperature conditions. During the period, the surface of the test piece should be covered with geotextile and regularly sprayed with water for treatment. The properties of ECC materials are shown in Table 2.

Table 2 ECC material properties

(4) Install the photovoltaic module after the maintenance of the ECC board, and use the bonding material to completely bond the photovoltaic material to the ECC board to ensure that the lower part of the photovoltaic module does not have a void that affects its stress. A 1-10mm temperature seam is reserved when the photovoltaic module is installed, and the temperature seam is filled with waterproof and elastic materials.

(5) Install the photovoltaic module junction box, and connect several photovoltaic modules according to the circuit design.

2. According to the pavement structure design, lay the subgrade and base layer on the proposed road.

Subgrade 12 can be a soil subgrade that meets the requirements of my country's "Highway Subgrade Design" (JDGD30). The subgrade should be stable, dense and homogeneous, and can provide uniform support for the pavement structure; its technical indicators should conform to my country's "Highway Subgrade Construction Technology" Specifications (JTJF10).

The base layer 10 may be cement stabilized granules, roller compacted concrete or lean concrete base layer, and should have sufficient anti-scour ability and certain rigidity. Its design thickness should conform to the "Code for Design of Cement Concrete Pavement" (JDGD40). Depending on the road grade or traffic volume, one or two layers can be set up. When the base layer is thicker, the construction is divided into two layers; the selection of the base material And its technical indicators should comply with the relevant regulations of our country.

3. According to the road design requirements, the surface layer is selected as a cement concrete layer and paved and maintained.

The surface layer is cement concrete 9, which is the main bearing layer of the pavement structure, bears the vehicle load and provides stable support for the pavement plate unit combined with the prefabricated photovoltaic modules and ECC. To have sufficient strength and durability, the surface is flat. The design thickness of cement concrete should comply with my country's "Code for Design of Highway Cement Concrete Pavement" (JDGD40). and Cement Concrete Test Regulations" (JTJE30), and its technical indicators should comply with my country's "Technical Specifications for Highway Cement Concrete Pavement Construction" (JTJF30).

4. After the construction of the concrete surface layer is completed, level the surface of the cement concrete layer, and then evenly apply a binder on the surface. The binder can be epoxy resin, polyurethane composite glue, etc., and use a crane or other construction machinery to Prefabricated panel units are shipped to site for installation work.

5. The adjacent plate units are in the form of mutual insertion and overlap, and are bonded to the cement concrete surface layer through the adhesive to form a whole to bear the load together. When the plate units are overlapped, a 1-10mm temperature seam is reserved to dissipate the deformation caused by the temperature. The size of the temperature seam depends on the local temperature gradient and the length of the prefabricated unit plate. Use waterproof and elastic material to fill the temperature seam tightly.

7. Lay two rows of prefabricated plate units symmetrically in a single lane, with a 15cm wide pipeline trench in the middle. Connect the adjacent plate units according to the circuit design. All lines are buried in the pipeline trench, and high-strength waterproof materials are used for the pipelines. The ditch is poured to the road elevation.

When assembling the plate unit, the height difference between the adjacent plates should be strictly controlled, and the smoothness of the road surface should meet the specification requirements.

The prefabricated ECC-cement concrete photovoltaic power generation pavement structure provided by the invention can realize the rapid construction of the pavement structure layer, and the pavement structure layer bears more combined force, and at the same time, the protection of the pipeline trench and the junction box is strengthened, so that the long-term use performance of the photovoltaic pavement is improved. It is more excellent and can improve the service life of photovoltaic pavement.

Example 3

The photovoltaic pavement is laid according to the process of Example 2. When the pavement is damaged and needs to be repaired, the implementation steps are as follows:

If the panel unit is damaged, loses the road function or needs to be replaced with the power generation function, you can remove the damaged panel and replace it with a new panel unit, and restore the circuit connection there. Specific steps are as follows:

1. The prefabrication process of the plate unit is the same as that of Example 1

2. Remove the damaged plate unit in the road, be careful not to damage the connected circuit in the pipeline trench. The lower cement concrete layer can be re-leveled with materials such as mortar.

3. Transport the prefabricated slab units in the factory to the repair site, overlap with the adjacent slab units, and bond with the cement concrete surface layer to form a whole. 5-10mm temperature seam is reserved when the plate units are overlapped, and the temperature seam is filled and dense with waterproof and elastic materials.

4. Restore the connection between the pipeline of the plate unit and the pipeline of the adjacent plate.

5. Repair the damage to the pipeline trench around the plate unit.

6. Recycle the dismantled damaged boards for inspection, and make subsequent repairs for later use.

7. Open to traffic and open to traffic normally.

Example 4

The construction method for the reconstruction of photovoltaic power generation pavement for the existing cement concrete pavement includes the following steps:

Step 1 Prefabrication of prefabricated panel units

1-1 Configure ECC material and stir;

1-2 Pour the ECC material into the template prepared in advance, and after meeting the performance requirements, remove the mold to obtain

ECC board;

1-3 Install the photovoltaic module of the photovoltaic panel, and use the adhesive material to completely bond the photovoltaic material to the ECC board. When installing the photovoltaic panel of the photovoltaic panel, reserve a temperature seam, and the temperature seam is filled with waterproof and elastic materials. .

1-4 Install the photovoltaic panel photovoltaic module junction box, and connect several photovoltaic panel photovoltaic modules according to the circuit design.

Step 2. Investigate, analyze and evaluate the existing cement concrete pavement. When the structural strength of the pavement does not meet the requirements, the pavement is repaired by means of covering, milling, and mortar repair, and then the surface of the cement concrete layer is leveled;

Step 3. Roughen the existing cement concrete pavement;

Step 4. Use a high-pressure water gun to clean the road surface, and fully clean the loose particles or other dirt on the road surface to improve the bonding effect between the prefabricated panel unit and the cement concrete road surface;

Step 5. After the existing pavement is dried or dried naturally, the adhesive is evenly spread on its surface, and the prefabricated plate unit is transported to the site for installation;

Step 6 Adjacent plate units are in the form of overlapping each other, and are bonded with the cement concrete surface layer through the adhesive to form a whole to bear the load together. When the plate units are overlapped, a temperature seam is reserved to dissipate the deformation caused by the temperature, and the temperature seam is filled and dense with a waterproof and better elastic material.

As a further technical solution, two rows of prefabricated plate units are symmetrically laid in the single lane, with wide pipeline trenches left in the middle, the adjacent plate units are connected according to the circuit design, and all the lines are buried in the pipeline trenches. The high waterproof material is poured into the pipeline trench to the road elevation.

As a further technical solution, when assembling the plate unit, the height difference between the adjacent plates should be strictly controlled, and the smoothness of the road surface should meet the specification requirements.

The prefabricated ECC-cement concrete photovoltaic power generation pavement structure provided by the present invention can realize quick repair after the pavement is damaged, thus reducing the problem of inconvenience of traffic caused by pavement maintenance, and has little impact on other plates during the replacement process. The construction difficulty is low and convenient.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims (10)

1. an assembled ECC-cement concrete photovoltaic power generation pavement structure, is characterized in that, comprises at least the roadbed, base layer, cement concrete surface layer and photovoltaic power generation functional layer that are set sequentially from bottom to top; The photovoltaic power generation functional layer includes a plurality of prefabricated plate units, and each of the prefabricated plate units is composed of a plurality of photovoltaic modules and an ECC board. After the plurality of photovoltaic modules are connected in series and parallel, they are located in the ECC. The top of the board and the photovoltaic module and the ECC board are bonded together by bonding materials to form a whole; structural steel bars are arranged inside the ECC board, and the necessary elements for installing the photovoltaic module are reserved in the ECC board. Device junction boxes and installation slots for photovoltaic module circuits; temperature seams are set between adjacent photovoltaic modules and adjacent prefabricated plate units, and the temperature seams are filled with elastic materials; adjacent prefabricated plate units are plugged Or/and lapped together, and the lapped part is provided on the ECC board. 2. The prefabricated ECC-cement concrete photovoltaic power generation pavement structure according to claim 1, characterized in that, along the longitudinal direction of the road, adjacent prefabricated plate units are overlapped together; or along the longitudinal and transverse directions of the road, Adjacent prefabricated panel units are lapped together. 3 . The assembled ECC-cement concrete photovoltaic power generation pavement structure according to claim 2 , wherein temperature joints are set at the overlapping positions of adjacent prefabricated plate units, and the temperature joints are filled with elastic materials. 4 . 4. The prefabricated ECC-cement concrete photovoltaic power generation pavement structure according to claim 1, characterized in that, along the longitudinal direction of the road, adjacent prefabricated plate units are plugged together, or along the longitudinal and transverse directions of the road , the adjacent prefabricated plate units are plugged together. The prefabricated ECC-cement concrete photovoltaic power generation pavement structure according to claim 4, characterized in that, temperature joints are set at the insertion positions of the adjacent prefabricated plate units, and the temperature joints are filled with elastic materials. 6. The prefabricated ECC-cement concrete photovoltaic power generation pavement structure according to claim 1, wherein some adjacent prefabricated plate units reserve pipeline trenches for burying all pipelines. 7. The prefabricated ECC-cement concrete photovoltaic power generation pavement structure according to claim 1, characterized in that, when the soil is poor and the roadbed is too wet, a cushion can be set between the roadbed and the base, and the cushion can be Made of graded crushed stone or gravel. 8 . The fabricated ECC-cement concrete photovoltaic power generation pavement structure according to claim 1 , wherein a sub-base is arranged under the base. 9 . 9 . The assembled ECC-cement concrete photovoltaic power generation pavement structure according to claim 1 , wherein the concrete surface layer and the photovoltaic power generation functional layer are bonded by an adhesive. 10 . 10. The construction method of the fabricated ECC-cement concrete photovoltaic power generation pavement structure as described in any one of claims 1-9, characterized in that, comprising the following steps: Step 1 Prefabrication of prefabricated panel units 1-1 Configure ECC material and stir; 1-2 Pour the ECC material into the template prepared in advance, and after meeting the performance requirements, remove the mold to obtain the ECC board; 1-3 Install the photovoltaic module, and use the adhesive material to completely bond the photovoltaic material to the ECC board. When installing the photovoltaic module, reserve a temperature seam, and the temperature seam is filled with waterproof and elastic materials; 1-4 Install the photovoltaic module junction box, and connect several photovoltaic modules according to the circuit design; Step 2. According to the pavement structure design, lay the subgrade and base layer on the proposed road; Step 3: According to the road design requirements, select the surface layer as a cement concrete layer and perform paving and maintenance; Step 4 After the construction of the concrete surface layer is completed, the surface of the cement concrete layer is leveled, and then the adhesive is evenly applied to the surface, and the prefabricated plate unit is transported to the site for installation work; Step 5 Adjacent plate units are in the form of overlapping each other, and are bonded with the cement concrete surface layer through the adhesive to form a whole to bear the load. When the plate units are overlapped, a temperature joint is reserved to dissipate the deformation caused by the temperature. The waterproof and elastic material fills the temperature seam tightly.

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