Construction, operation and maintenance road for desert photovoltaic power station

Abstract

The utility model discloses a construction, operation and maintenance road for a desert photovoltaic power station in the technical field of road construction, which comprises a geocell, a red clay layer and a thick mud gravel surface layer which are sequentially arranged on a sand roadbed from bottom to top, the geocell is filled with fine gravels, earth shoulders are arranged on the red clay layer along two sides of the road, and the thick mud gravel surface layer is arranged on the red clay layer along two sides of the road. A groove-shaped space formed by the earth shoulder and the red clay layer is filled with the thick mud gravel surface layer. The earthwork standard room is used as a middle roadbed body, the structural strength of the roadbed can be improved, the effect of stabilizing the bottom sand roadbed is achieved, the earthwork standard room and the thick mud gravel surface layer are connected through the red clay layer, red clay has high viscosity, the roadbed strength is improved after the red clay is combined with sandy soil, the load of the road surface layer is evenly transmitted to the roadbed, and the roadbed structure is stable. The pavement cracking condition is reduced; most materials of the whole road are obtained locally, construction and operation and maintenance requirements of desert photovoltaic power stations are met, cost is low, and ecological environmental protection is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of road construction, in particular to a construction and operation road for desert photovoltaic power stations. Background Art

[0002] Solar energy is a clean, renewable resource. With the gradual increase in installed capacity of photovoltaic power stations, desert photovoltaic power stations are being developed extensively. PV power station roads are key access points for power station construction and operation and maintenance. PV array roads connect the substation locations of each PV array area. During the construction phase, they serve as transportation channels for electrical equipment such as photovoltaic modules, PV racks, and substations. After project completion, they serve as maintenance access points. Therefore, the construction of PV array roads is crucial to the overall photovoltaic project. However, PV power station roads located in deserts are difficult to construct due to a shortage of road materials. Furthermore, perennial wind erosion severely damages the road structure, compromising subsequent power station operation and maintenance. Therefore, it is crucial to develop a road structure suitable for desert photovoltaic power station roads. Currently, highway roadbeds in desert areas are typically constructed in two layers, using general-purpose Portland cement and water glass solution to improve desert sand. While this structure is suitable for high-grade highways with heavy traffic, it is also expensive, and the use of water glass and cement can be environmentally damaging. Utility Model Content

[0003] In order to overcome the above-mentioned deficiencies of existing high-grade desert roads, the technical problem to be solved by the present invention is to provide a low-cost construction and operation road suitable for desert photovoltaic power stations.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A construction and operation road for a desert photovoltaic power station includes a geocell, a red clay layer, and a thick mud and gravel surface layer, which are arranged on a sandy roadbed from bottom to top. The geocell is filled with fine sand and gravel. Earth shoulders are provided on both sides of the road along the red clay layer. The thick mud and gravel surface layer is filled in the trough-shaped space formed by the earth shoulders and the red clay layer.

[0006] Furthermore, the geocell comprises multiple layers, the distance between two adjacent layers of geocells is 30 cm, and the topmost layer of geocells is located 30 cm below the red clay layer.

[0007] Furthermore, each layer of geocell is fixed to the sand below it by U-shaped nails.

[0008] Furthermore, the thickness of the red clay layer is 10-15 cm.

[0009] Furthermore, the thickness of the thick mud and gravel surface layer is 15-20 cm.

[0010] Furthermore, the surface of the thick mud and gravel surface layer is provided with a downward slope of 2% from the middle to both sides.

[0011] Furthermore, both sides of the road are provided with red clay edging with a slope of not less than 1:2, and the thickness of the red clay edging is 2-3cm.

[0012] Furthermore, shrubs are planted on both sides of the road.

[0013] The beneficial effects of the utility model are as follows: using the geocell as the main body of the intermediate roadbed can improve the structural strength of the roadbed, and at the same time stabilize the bottom sand roadbed to avoid roadbed settlement; red clay has high viscosity, and after combining with sand, the roadbed strength is improved, the road surface load is evenly transferred to the roadbed, and the road surface cracking is reduced; most of the materials of the entire road are locally sourced, which meets the construction and operation and maintenance requirements of the desert photovoltaic power station, has low cost, does not use materials such as water glass and cement that are more destructive to the environment, and is beneficial to ecological protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of the utility model.

[0015] Marked in the figure are: 1- sandy roadbed, 2- geocell, 3- red clay layer, 4- thick mud and gravel surface layer, 5- earth shoulder, 6- U-shaped nails, 7- red clay edging, 8- shrubs. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] It should be noted that if directional terms are used in this utility model, such as "up," "down," "left," "right," "front," and "back," these are intended to facilitate the description of the relative positions of components and are not intended to specify the absolute positions of the related components or the positional relationships between them. They are only used to explain the relative positional relationships and movement of the components in a specific posture. If the specific posture changes, the directional indication will also change accordingly. If terms related to quantity are used in this utility model, such as "multiple," "a plurality," or "several," these specifically refer to two or more.

[0018] like Figure 1As shown, the utility model provides a construction and maintenance road for a desert photovoltaic power station, comprising, from bottom to top, a geocell 2, a red clay layer 3, and a thick mud and gravel surface layer 4, arranged sequentially on a sandy roadbed 1. The geocell 2 is filled with fine sand and gravel. Earth shoulders 5 are provided on both sides of the road above the red clay layer 3. The thick mud and gravel surface layer 4 is filled in the trough-shaped space formed by the earth shoulders 5 and the red clay layer 3. Using the geocell 2 as the main body of the intermediate roadbed can improve the structural strength of the roadbed, while also stabilizing the underlying sandy roadbed 1 and preventing roadbed settlement. The red clay has high viscosity, which, when combined with the sand, increases the roadbed strength and evenly transfers the road surface load to the roadbed, reducing road cracking. Most of the materials used in the entire road are locally sourced, resulting in low manufacturing costs. Environmentally friendly materials such as water glass and cement, which are highly destructive, are not used, which is beneficial to ecological protection.

[0019] The thickness of each structural layer of the road can be designed according to the load-bearing conditions of the photovoltaic power station during construction and operation and maintenance. The construction can be carried out according to the following steps and indicators:

[0020] First, compact the sandy roadbed 1. Based on the best moisture content and maximum dry density of the sand obtained through field experiments, water the bottom roadbed and compact it to a compaction degree of not less than 94%. The site can be leveled by using methods such as tamping hammers or impact rolling.

[0021] Then the construction of the middle roadbed is carried out. The middle roadbed is a structure of geocell 2 filled with sand and gravel. Its overall height is designed according to the distance from the sandy roadbed 1 to the red clay layer 3. Therefore, the geocell 2 generally needs to be paved in multiple layers. The distance between two adjacent layers of geocell 2 can be controlled at about 30 cm. The top layer of geocell 2 is located about 30 cm below the red clay layer 3. Each layer of geocell 2 is fixed in the sand below it by U-shaped nails 6. The peeling force of the open end of the U-shaped nail 6 should be ≥300N to ensure the stability of the geocell 2. After paving the geocell 2, it is strictly forbidden to expose it to the sun. The filling material should be filled within 48 hours according to the principle of first the two sides and then the middle. The particle size of the fine sand and gravel filled in the geocell 2 should not be greater than 5 cm to ensure that the subsequent compaction degree meets the requirements;

[0022] Finally, the red clay layer 3 and the thick mud and gravel surface layer 4 are laid in sequence. The red clay layer 3 is 10-15 cm thick. The red clay layer 3 has high viscosity, which can provide a stable connection and buffering effect between the geocell 2 and the thick mud and gravel surface layer 4, thereby evenly transferring the load. Before laying the thick mud and gravel surface layer 4, earth shoulders 5 can be built along both sides of the road to ensure that the earth shoulders 5 are stably connected to the red clay layer 3. After that, the thick mud and gravel surface layer 4 is filled in the trough-shaped space in the middle. The thick mud and gravel surface layer 4 is 15-20 cm thick and is made of a mixture of clay and gravel. The particle size of the gravel should not be greater than 5 cm, and the compaction degree should not be less than 94%. Because the vehicles used for the construction and operation of desert photovoltaic power stations do not have high load-bearing capacity, the use of a thick mud and gravel surface layer 4 can meet the load-bearing strength requirements.

[0023] Furthermore, to prevent rainwater and sand from accumulating in the middle of the road, the thick mud and gravel surface layer 4 has a 2% downward slope from the center to the sides. To prevent wind and sand from damaging the roadbed, red clay edging 7 with a slope of no less than 1:2 and a thickness of 2-3 cm is installed on both sides of the road. To reduce wind and sand erosion, shrubs 8 adapted to the local environment, such as Haloxylon ammodendron, can be planted on both sides of the road.

[0024] The above-mentioned road structure uses the geocell 2 as the middle roadbed body, which can improve the strength of the roadbed structure and at the same time stabilize the bottom sand roadbed 1 to prevent roadbed settlement. The red clay layer 3 is used to connect the geocell 2 and the thick mud and gravel surface layer 4, which can improve the connection strength between the two and evenly transfer the load of the thick mud and gravel surface layer 4 to the geocell 2, reducing the cracking of the road surface. In addition, most of the materials of the entire road are locally sourced, which meets the construction and operation and maintenance requirements of desert photovoltaic power stations. The manufacturing cost is low, and materials such as water glass and cement that are more destructive to the environment are not used. It is beneficial to ecological protection and has good practicality and application prospects.

Claims

1. Construction and operation road for desert photovoltaic power stations, characterized by: The invention comprises a geocell (2), a red clay layer (3) and a thick mud and gravel surface layer (4) which are sequentially arranged on a sandy roadbed (1) from bottom to top, wherein the geocell (2) is filled with fine sand and gravel, earth shoulders (5) are arranged on both sides of the road on the red clay layer (3), and the thick mud and gravel surface layer (4) is filled in a trough-shaped space formed by the earth shoulders (5) and the red clay layer (3).

2. The construction and operation road for a desert photovoltaic power station according to claim 1, characterized in that: The geocell (2) comprises multiple layers, the distance between two adjacent layers of geocells (2) is 30 cm, and the topmost layer of geocells (2) is located 30 cm below the red clay layer (3).

3. The construction and operation road for a desert photovoltaic power station according to claim 2, characterized in that: Each layer of geocell (2) is fixed in the sand below it by U-shaped nails (6).

4. The construction and operation road for a desert photovoltaic power station according to claim 1, characterized in that: The thickness of the red clay layer (3) is 10-15 cm.

5. The construction and operation road for a desert photovoltaic power station according to claim 1, characterized in that: The thickness of the thick mud and gravel surface layer (4) is 15-20 cm.

6. The construction and operation road for a desert photovoltaic power station according to claim 5, characterized in that: The surface of the thick mud and gravel surface layer (4) is provided with a downward slope of 2% from the middle to both sides.

7. The construction and operation road for a desert photovoltaic power station according to claim 1, characterized in that: Both sides of the road are provided with red clay edging (7) with a slope of not less than 1:2, and the thickness of the red clay edging (7) is 2-3 cm.

8. The construction and operation road for a desert photovoltaic power station according to claim 1, characterized in that: Shrubs (8) are planted on both sides of the road.

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