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.
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Misaligned piles can lead to structural imbalances, which in turn cause inefficiencies in the solar farm''s performance. Additionally, depth control is vital to the stability of the foundation. Accurate control of the pile driving depth
Request PDF | On Apr 1, 2023, Gongliang Liu and others published Frost jacking characteristics of steel pipe screw piles for photovoltaic support foundations in high-latitude and low-altitude
Figure 2. Scheme of load transfer by piles to soil and foundations (a) Friction pile (b) End-bearing-pile (Mangushev, 2016). 2 General theory on design The design of a pile foundation requires a
photovoltaic systems in cold areas is influenced by the interaction of the shallower layer of soil with the atmosphere. In particular, the frost heaving induced by freezing of the ground can
where Q s is the total pile side ultimate negative frictional resistance; Q p is the pile end ultimate bearing capacity; q si is the unit ultimate negative frictional resistance of layer
The foundation''s load-bearing strength is inadequate, whereas the requirements for offshore photovoltaic installations demand pile foundations with substantial bearing capacity. Through
terms of providing foundation options that are cost-effective, quick to install, and environmentally friendly. This paper highlights some of these challenges and addresses the opportunities for
Following the previous section that explained the general background and universal equations for the estimation of a single pile''s load-bearing capacity, we will continue with three specific
DOI: 10.1016/j.sandf.2023.101277 Corpus ID: 256352338; Frost jacking characteristics of steel pipe screw piles for photovoltaic support foundations in high-latitude and low-altitude regions
Pile Foundations Design. Why When Piles Need to Support the Structure. If the pile socketed in the rock (cast in situ bored piles) end bearing in the rock is used to calculate the pile capacity. The above five parameters are provided by
This study has comprehensively investigated the bearing characteristics of three types of photovoltaic support piles, serpentine piles, square piles, and circular piles, in desert gravel areas. Through numerical
It is required to found this building on a pile foundation. Using the pile catalogue, carry out sufficient calculation to establish the pile layout and quantity of reinforcing steels required in
In practical engineering, the pile foundation that only bear the single direction load is rare. Pile foundation usually bears the lateral load as well as the vertical load generated by
1. Introduction. With superior force transmission performance, pile foundations have good applicability in improving the bearing capacity of foundations and controlling the
In recent years, the advancement of photovoltaic power generation technology has led to a surge in the construction of photovoltaic power stations in desert gravel areas. However, traditional equal cross-section
Keywords: photovoltaic plant, load test, foundation, metallic pile, traction, compression, lateral load, pull out test, jacking. Summary: Foundations projected for photovoltaic plants resists
For an offshore photovoltaic helical pile foundation, significant horizontal cyclic loading is imposed by wind and waves. Helical piles are widely used in onshore PV support
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.
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.
A comprehensive design program is proposed based on field tests and numerical simulations, considering deformation and bearing capacity. The study confirms the reliability of the PHC pile foundation as a support structure for heliostats, aiming to offer valuable insights for practical applications.
However, due to the fact that the foundation part of PHC piles was buried in the soil, it was challenging to obtain the deformation and stress state through monitoring means. There was no direct test method available for measuring the deformation of short pile foundations beneath the ground.
The pretension and diameter of the cables are the most important factors of the ultimate bearing capacity of the new cable-supported PV system, while the tilt angle and row spacing have little effect on the mechanical characteristics of the new type of cable-supported photovoltaic modules.
Long span, light weight, strong load capacity, and adaptability to complex terrains. The nonlinear stiffness of the new cable-supported photovoltaic system is revealed. The failure mode of the new structure is discussed in detail. Dynamic characteristics and bearing capacity of the new structure are investigated.
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