Several common solar mounting rack bases

2018-07-11 08:32
The importance of solar mounting rack is the most important in the entire PV power plant system. The design and installation of the entire matrix is directly related to the power generation and stability of the PV power plant. Therefore, the selection of the solar mounting rack base is particularly important. However, for many owners who want to install photovoltaic power plants, they often feel confused about the environment in which they want to install photovoltaics and how to choose the right base type. As a world-leading manufacturer of solar photovoltaic modules, CHIKO Solar has, for many years of practical experience, summed up the following types of bases and their characteristics.
Ground solar mounting rack Base Types and Features:
NO.1 Drilling and Grouting Pile Base: It is more convenient to form holes, adjust the elevation of the top surface of the foundation according to the terrain, the top elevation is easy to control, 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 in the field, which are suitable for general filling, cohesive soil, silt, sand and the like.
NO.2 steel ground screw base:
Hole formation is convenient. The elevation of the top surface can be adjusted according to the topography without being affected by groundwater. The construction is performed as usual in winter weather conditions. The construction is fast, the elevation adjustment is flexible, and the damage to the natural environment is very small. There is no filling and excavation work, and the original vegetation is destroyed. Small, no field level. Applicable to deserts, grasslands, tidal flats, next door, frozen soil, etc. However, the use of large steel makes it costly and does not apply to strongly corroded foundations and rock bases.

 NO.3 independent base:
Strongest resistance to water loads, flood resistance and wind resistance. The largest amount of reinforced concrete is required, many are artificial, the amount of earth excavation and backfilling is large, the construction period is long, and the environment is destructive. Solar mounting rack projects have rarely been used.
NO.4 reinforced concrete bar base:
This kind of pedestal form is mostly used for poor bearing capacity of foundations, and it is suitable for flat uniaxial tracking supports with relatively flat fields, low groundwater levels, and high 
requirements for uneven settlement.
NO.5 prefabricated pile base:
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 to the front and rear columns of the upper photovoltaic rack. The depth is generally less than 3 meters, and construction is relatively simple. 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 soils, and the pebbles or crushed stones are harder. Stones may have problems with not forming holes.
NO.7 steel spiral pile base:
t is screwed into the soil using special machinery. The construction speed is quick, there is no need for site formation, no concrete for the earthwork, and maximum protection of the vegetation in the field. The height of the support can be adjusted with the terrain, and the spiral pile can be used twice.
Flat roof solar mounting rack base type and characteristics:

 NO.8 Cement counterweight method:
Placing concrete piers on the cement roof, this is a common installation method, with a solid advantage, without damaging the roof waterproofing
 NO.9 Precast cement counterweight: Compared to making cement piers, it saves time and saves cement embedded parts.
Reasonable solar mounting rack system layout can improve the system's wind and snow load capacity, and rational use of its load-bearing characteristics can contribute to the further reduction of cost of photovoltaic systems.
The loads acting on the base of the solar mounting rack include: the weight of the solar mounting rack and the PV module (constant load), wind load, snow load, temperature load and seismic load. Among them, the wind load is the main control function. Therefore, the foundation of the foundation design should ensure the stability of the foundation under the action of wind load. Under the action of wind load, the foundation may be damaged due to lifting, fracture, etc. The base design should be It can guarantee no damage under this force. CHIKO solar mounting rack is based on the principle of highest quality. Aluminum profiles use AL6005 grades, processing T5, anodizing 12-15MIC on the surface; all stainless steel materials are 304 grades; steel grade Q235, surface treatment hot-dip galvanizing average 80MIC, ts service life can reach 30 years; the wind load of the CHIKO solar mounting rack products can reach more than 42M/s, and the snow load capacity is above 1.4KN/m2, which can withstand the test of user time!

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