A reasonable form of photovoltaic bracket can improve the system's ability to resist wind and snow load, and reasonably use the characteristics of the photovoltaic support system in terms of bearing capacity. It can further optimize its size parameters, save materials, and contribute to the further reduction of the cost of the photovoltaic system.
The loads acting on the basis of the PV module bracket mainly include: the weight of the bracket and the photovoltaic module (constant load), wind load, snow load, temperature load and seismic load. Among them, the wind load is the main control function. Therefore, the basic design should ensure the stability of the foundation under the action of wind load. Under the action of wind load, the foundation may have the phenomenon of pull-up, fracture, etc. The basic design should be able to guarantee the force No damage occurs.
Below we have to understand what are the basic types of ground-based photovoltaic stents and planar roof photovoltaic stents and what are their characteristics.
Ground PV Bracket Foundation
NO.1 bored pile foundation:
Hole formation is more convenient. The top surface elevation can be adjusted according to the topography, the top elevation can be easily controlled, the amount of concrete reinforcement is small, the amount of excavation is small, the construction is fast, and the damage to the original vegetation is small. However, there are concrete holes and pouring at the site, which are suitable for general filling, cohesive soil, silt, and sand.
NO.2 steel spiral foundation:
Hole formation is convenient, and the elevation of the top surface can be adjusted according to the terrain without being influenced by groundwater. The construction is performed as usual in winter weather conditions, the construction is quick, the elevation adjustment is flexible, and the damage to the natural environment is very small, there is no fill and excavation work, and the original vegetation is destroyed. Small, no field level. Applicable to deserts, grasslands, beaches, next door, frozen soil. However, the use of steel is large and it is not suitable for strong corrosive foundations and rock foundations.
NO.3 independent basis:
Strongest resistance to water loads, flood resistance and wind resistance. The largest amount of reinforced concrete is required, many are artificial, the excavation and backfilling of earthwork is large, the construction period is long, and the environmental destruction is great. Photovoltaic projects have rarely been used.
NO.4 reinforced concrete strip foundation:
This type of basic form is mostly used in poor foundation bearing capacity and is suitable for flat single-axis tracking photovoltaic supports with relatively flat sites, low groundwater levels, and high requirements for uneven settlement.
NO.5 Precast pile foundation:
Pre-stressed concrete pipe piles with a diameter of about 300 mm or square piles with a section size of approximately 200*200 are driven into the soil. The top reserved steel plate or bolts are connected with the front and rear columns of the upper support. The depth is generally less than 3 meters. The construction is simple and fast. .
NO.6 bored pile foundation:
The construction cost is lower, but the requirements for the soil layer are higher. It is applicable to silty soils with a certain degree of compaction or plastic clays and hard plastic silty clays. It is not suitable for loose sandy soil layers, and the pebbles or crushed stones are harder. Stones may have problems with not forming holes.
NO.7 steel spiral pile foundation:
It is screwed into the soil with special machinery. The construction speed is quick, there is no need for site formation, no concrete for the earth, and maximum protection of vegetation in the field. The height of the support can be adjusted with the terrain, and the spiral pile can be used twice.
NO.8 Planar Roof PV Bracket Foundation:
Cement counterweight method: Cement concrete piers are poured on the cement roof. This is a common installation method. The advantages are firm and do not damage the roof waterproof.
Prefabricated cement counterweight: It is more time-saving to make cement piers and save cement embedded parts.
Anti-cursor belt, also known as pre-shaped road anti-cursor belt, is a new type of reflective material made of a combination of high-molecular flexible polymers, pigments and glass beads.
Anti-cursor bands are mainly used for highway pavement indications: such as zebra crossing, center double solid line, lane dividing line, text, arrows, etc. Suitable for asphalt, cement, concrete, marble and other pavements and walls.
The main feature of the anti-cursor belt is that it is pre-formed, and the product substrate and surface have glass beads, which have good reflective and non-slip properties. The colors are bright and never fade.
The types of anti-cursor tapes can be divided into: engineering anti-cursor tapes, engineering anti-smudge tapes, temporary anti-cursor tapes, and temporary anti-smudge tapes.
Uses: Directional signs; prohibition signs, warning signs and indication signs, and signs used on ground advertising.
Life: According to road conditions, traffic flow and installation, the service life can be at least 2 years.
Engineering Grade Cursor Belt
Both the substrate and the surface of this tape have glass microbeads, which have the effect of reflecting light and sliding. Generally, there are two types: ordinary type and self-adhesive type. It is suitable for the production of various markings, arrows, text, patterns, colored ground signs, colored three-dimensional signs, pipeline signs, self-adhesive parking plates, and ground advertising.
Construction requirements: construction is simple and fast. The construction road must be clean, dry and level. Use in an environment where the air temperature is not lower than 5 Â° C and the ground temperature is not lower than 10 Â° C.
Engineering anti-fouling tape
The surface of this tape has been treated with a special process. The surface does not have glass beads and is smooth and flat. It has a good self-cleaning effect. Generally there are two types: ordinary type and adhesive type.
Especially in supermarkets, factories, squares and other places with high requirements for cleanliness.
Temporary anti-cursor band
Both the substrate and the surface of this tape have glass microbeads, which have the effect of reflecting light and sliding. The back of the product is provided with a primer, which can be directly adhered to the ground or wall. It is suitable for making various markings, arrows, text, and patterns.
Use: It is a short-acting product when it is used for temporary diversion. According to different road conditions and traffic volume, it is directly stuck to the ground, and its service life is usually 1-3 months.
-It is a long-acting product used on various floors and walls without rolling vehicles indoors and outdoors. Its service life is usually more than 2 years.
Temporary antifouling tape
The surface of this tape has been treated with a special process. The surface does not have glass beads and is smooth and flat. It has a good self-cleaning effect. The back of the product is provided with a primer, which can be directly adhered to the ground or wall. It is suitable for making various markings, arrows, text, and patterns.
It is used on various floors and walls without rolling vehicles indoors and outdoors. It is a long-term product, and its service life is usually more than 2 years.
Applicable roads: Suitable for various pavements and walls such as asphalt, cement, concrete, and marble. Especially in supermarkets, factories, airports, exhibition halls and other places that require high cleanliness.
Can be directly pasted for indoor or vehicle rolling.
Reflective Traffic Safety Sign,Reflective Road Safety Sign,Reflective Road Sign,Traffic Road Street Sign
Jieyang Xinxin Industry and Trade Co., Ltd. , https://www.gdxxgm.com