光伏支架H型钢桩现场试验承载特性分析  

Analysis of bearing characteristics of photovoltaic support H-shaped steel pile in field test

作　　者：丁晓勇 DING Xiao-yong(Shanghai Electrical Engineering Design Co.,Ltd.,Shanghai 201199,China)

机构地区：[1]上海电气工程设计有限公司,上海201199

出　　处：《地基处理》2022年第6期490-495,共6页Journal of Ground Improvement

摘　　要：光伏发电对实现清洁能源和解决能源危机具有重要意义。在沙漠地区建设发电站,光伏支架基础形式的选择尤为重要,光伏支架支撑的光伏组件较轻,竖向压力和水平推力是支架基础的主要受力形式,H型钢桩因抗弯刚度大和贯穿能力强而成为首选的基础形式。本文针对光伏支架受力特点,通过短H型钢桩现场竖向抗压抗拔试验,对比分析了不同桩长、不同截面尺寸型钢桩竖向承载力及其受力特性。分析结果表明,短H型钢桩在抗压抗拔试验中表现趋势相似;截面尺寸及桩身长度对型钢桩承载力影响显著,尺寸越大、桩身越长,则承载力越高;当桩长不同时,桩侧摩阻力的发挥是一个随深度变化的过程,且沿桩身方向从上到下依次开展;H型钢桩受压和受拉工况下其侧摩阻力峰值均发生在距桩端1/3位置处。研究成果可为实际工程提供理论参考。Photovoltaic power generation is of great significance to realize clean energy and solve energy crisis. In the construction of power stations in desert areas, the choice of foundation form of photovoltaic bracket is particularly important. The photovoltaic module supported by the photovoltaic bracket is relatively light, and the vertical pressure and horizontal thrust are the main stress forms of the support foundation. H-shaped steel piles have become the preferred foundation form due to its high bending stiffness and strong penetration capacity. In this paper, according to the stress characteristics of photovoltaic supports, the vertical bearing capacity and stress characteristics of steel piles with different pile length and sectional size are compared and analyzed through on-site vertical compressive and pull out tests of short Hshaped steel piles. The analysis results show that the behavior trend of short H-beam steel piles is similar in the compressive and pull out tests. The cross section size and the length of pile body have a significant effect on the bearing capacity of steel piles. The larger the size and the longer the pile, the higher the bearing capacity. When the pile length is different, the development of pile side friction is an asynchronous process, which is carried out from top to bottom along the direction of pile body. The peak value of lateral friction resistance of H-shaped steel piles occurs at the position 1/3 away from the pile end under compression and tension conditions. This research results can provide theoretical reference for practical engineering.

关 键 词：光伏发电 H型钢桩 抗压抗拔试验 桩基承载力 桩侧摩阻力 

分 类 号：TU476[建筑科学—结构工程]