About Causes of fracture of photovoltaic support pile foundation
The foundation's load-bearing strength is inadequate, whereas the requirements for offshore photovoltaic installations demand pile foundations with substantial bearing capacity. Through the comparison of various theoretical calculation methods with on-site test results, this study seeks to offer insights for optimizing offshore photovoltaic .
The foundation's load-bearing strength is inadequate, whereas the requirements for offshore photovoltaic installations demand pile foundations with substantial bearing capacity. Through the comparison of various theoretical calculation methods with on-site test results, this study seeks to offer insights for optimizing offshore photovoltaic .
Many cases of damage are caused by insufficient resistance of pile foundations. Pile foundations are often pulled out due to strong winds. There are cases where pile foundations collapse due to snow load.
To study the frost jacking performance of photovoltaic support steel pipe screw pile foundations in seasonally frozen soil areas at high latitudes and low altitudes and prevent excessive frost jacking displacement, this study determines the best geometric parameters of screw piles through in situ tests and simulation methods.
In the test with a supporting condition A, the mounting structure started to shift into the inelastic range slightly by rail stopper loosening (1800 Pa) and pillar base connection slippage (2000 Pa). Fracture of the pillar base connection and rail stoppers occurred at 2500 Pa (Fig. 2 a).
Compared with the traditional pile photovoltaic structure, the new offshore platform structure has significantly improved the bearing capacity and disaster prevention ability. Moreover, the cross-scale damage evaluation method proposed in this paper can be used to optimise the global structure, which realises the organic unity of cost control .
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6 FAQs about [Causes of fracture of photovoltaic support pile foundation]
Can photovoltaic support steel pipe screw piles survive frost jacking?
To study the frost jacking performance of photovoltaic support steel pipe screw pile foundations in seasonally frozen soil areas at high latitudes and low altitudes and prevent excessive frost jacking displacement, this study determines the best geometric parameters of screw piles through in situ tests and simulation methods.
What are the different types of photovoltaic support foundations?
The common forms of photovoltaic support foundations include concrete independent foundations, concrete strip foundations, concrete cast-in-place piles, prestressed high-strength concrete (PHC piles), steel piles and steel pipe screw piles. The first three are cast-in situ piles, and the last three are precast piles.
What is the Frost jacking of the photovoltaic pile?
Considering the thawing settlement of the pile body, within the 25-year service period of the photovoltaic power project, the frost jacking of the pile is approximately 144.68 mm. anti-frost jacking measures are recommended to reduce the impact of frost heaving.
Can solar panels be rehabilitated during frost heaving?
Some solar PV facilities constructed earlier and facing frost heaving issues with piles had to resort to this sort of rehabilitation since many piles at these sites moved out by 75mm to over 100mm (mostly differentially) thereby exerting additional stresses on the racking, distortion on the panels and tension on the connecting wires.
Can helical piles be used for ground-mounted solar PV systems?
For ground-mounted solar PV systems, two different pile foundation types were experimentally analysed for the pull-out test in clayey, sandy, and mixed ( c – ϕ) soils. Maximum uplift load at failure of various diameter and length were compared for plain piles with helical piles.
What is a photovoltaic support foundation?
Photovoltaic support foundations are important components of photovoltaic generation systems, which bear the self-weight of support and photovoltaic modules, wind, snow, earthquakes and other loads.