The aim of this study was to enhance the accuracy of predicting the temperature field of frozen soil and to reduce the workload of thermal parameter testing. To achieve this, we employed a three-phase model comprising soil, water, and ice. The unfrozen water content in frozen soil at varying temperatures was determined using nuclear magnetic resonance spectroscopy (NMR), while the thermal conductivity was measured by a thermal characteristic analyzer. A matlab software-based random model of the frozen soil was then established and imported into COMSOL simulation software. The repeatability and reproducibility of the established model were verified by varying the proportions of pore water and frozen ice to determine the degree of simulation accuracy.The results demonstrated that the unfrozen water content maintained a dynamic equilibrium relationship with temperature, which influenced the thermal conductivity of frozen soil. The simulation results were consistent with those obtained from instrument measurements of trends with respect to temperature. The average PBIAS value between the calculated and measured values was 0.0139, indicating theoretical feasibility. Comparison with experimental data confirmed the effectiveness of our approach, providing a novel concept and a simple method for predicting the temperature field of frozen soil engineering in areas that experience seasonal freezing.

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 photovoltaic bracket pile foundations require improvements to adapt to the unique challenges of these environments. This paper introduces a new type of photovoltaic bracket pile foundation named the “serpentine pile foundation” based on the principle of biomimicry. Utilizing experimental data, numerical simulation technology was employed to comprehensively investigate the pullout resistance, compressive resistance, and horizontal bearing performance of the serpentine pile foundation. Comparative analysis with traditional square and circular pile foundations revealed the serpentine pile foundation’s significant advantages in all performance indexes. The serpentine pile exhibits a significantly higher ultimate uplift bearing capacity of 70.25 kN, which is 8.56 times that of the square pile and 10.94 times that of the circular pile. This study not only offers valuable technical support for the construction of photovoltaic power plants in desert gravel areas but also holds great significance in advancing the sustainable development of the global photovoltaic industry.

With the continuous development and use of renewable energy, photovoltaic projects have become essential in the clean energy landscape. The bearing capacity and stability of their bracket foundations are crucial for the sustainable development of energy. Therefore, this paper aims to investigate the application of bionics principles to propose a novel type of photovoltaic bracket pile foundation designed to meet diverse bearing capacity requirements, specifically suited for desert gravel areas: the photovoltaic bracket serpentine pile foundation. This study aims to examine the factors influencing the bearing characteristics of the serpentine piles. Using a controlled variable method, we systematically analyze the effects of the serpentine pile embedment depth, width, spacing, and other factors on various aspects of the serpentine piles' performance, including ultimate bearing capacity, unit-volume concrete bearing capacity, pile displacement, and pile body stresses. The results indicate that these parameters significantly impact the bearing performance of the serpentine piles, with burial depth and width of the snakeskin body emerging as key factors. Finally, by employing multiple linear regression analysis, we propose recommendations for optimizing the serpentine pile parameters to achieve the best balance between load-bearing performance and economic viability. These recommendations, based on experimental data and analytical results, not only provide a theoretical basis for the design and application of serpentine piles but also serve as a valuable reference for the research and development of similar foundation treatment technologies.