ISSN 1000-3665 CN 11-2202/P
    丁晓勇,许能权,邢皓枫. 砂土场地型钢桩现场载荷试验及其承载特性分析[J]. 水文地质工程地质,2024,51(0): 1-11. DOI: 10.16030/j.cnki.issn.1000-3665.202303037
    引用本文: 丁晓勇,许能权,邢皓枫. 砂土场地型钢桩现场载荷试验及其承载特性分析[J]. 水文地质工程地质,2024,51(0): 1-11. DOI: 10.16030/j.cnki.issn.1000-3665.202303037
    DING Xiaoyong, XU Nengquan, XING Haofeng. Field load test and bearing characteristics analysis of shaped steel piles in sandy soils[J]. Hydrogeology & Engineering Geology, 2024, 51(0): 1-11. DOI: 10.16030/j.cnki.issn.1000-3665.202303037
    Citation: DING Xiaoyong, XU Nengquan, XING Haofeng. Field load test and bearing characteristics analysis of shaped steel piles in sandy soils[J]. Hydrogeology & Engineering Geology, 2024, 51(0): 1-11. DOI: 10.16030/j.cnki.issn.1000-3665.202303037

    砂土场地型钢桩现场载荷试验及其承载特性分析

    Field load test and bearing characteristics analysis of shaped steel piles in sandy soils

    • 摘要: 型钢短桩因承载机理不清而制约其在实际工程中的应用,但其又因耗材低、强度高、挤土量少、施工容易且运输便捷等优势被广泛应用于沙漠地区光伏发电工程。为了准确揭示沙漠地区型钢桩水平和竖向承载性能,选取某砂土场地,开展不同型号型钢桩(包括截面形状、截面面积、入土深度)的抗水平载荷试验以及竖向抗压、抗拔载荷试验,分析截面形状、截面尺寸以及桩长等参数对型钢桩承载性能的影响规律。研究结果表明:(1)管桩和H型钢桩的水平承载性能显著优于C型钢桩和槽型钢桩,管桩和H型钢桩相较于C型钢桩和槽型钢桩呈现出高抗风荷载的优势,且H型钢桩的水平承载性能与截面尺寸以及桩长密切相关;(2)管桩和H型钢桩的竖向承载性能同样显著优于C型钢桩与槽型钢桩,且H型钢桩的抗压、抗拔承载性能与截面尺寸和桩长呈正相关关系。当桩长相同时,H型钢桩竖向承载性能与管桩相近;(3)在砂土场地中H型钢桩的承载性能相较于其他桩型(C型钢桩、槽型和管桩)更为突出,且与传统的管桩相比,用材更少,能创造更大的经济价值,是沙漠光伏支架基础的优良桩型选择。该研究成果对实际工程具有借鉴作用。

       

      Abstract: The application of steel short piles in practical engineering is restricted due to its unclear bearing mechanism. However, due to advantages such as low cost, high strength, minimal soil displacement, easy construction, and convenient transportation, these piles are widely used in photovoltaic power projects in desert areas. In order to accurately reveal the horizontal and vertical bearing properties of section-steel piles in desert areas. In order to accurately reveal the horizontal and vertical bearing performance of steel piles in desert regions, horizontal load tests for different types of steel piles (including cross-sectional shape, cross-sectional area, and burial depth) and vertical compression and uplift load tests were conducted in a specific sandy site. The study analyzed the influence of parameters such as cross-sectional shape, cross-sectional size, and pile length on the bearing performance of steel piles. Research findings indicate: (1) The horizontal bearing performance of pipe piles and H-shaped steel piles is signifi-cantly better than that of C-shaped steel piles and trough-shaped steel piles. Compared with C-shaped steel piles and trough-shaped steel piles, pipe piles and H-shaped steel piles exhibit advantages in resisting wind loads, with the horizontal bearing performance of H-shaped steel piles closely related to the cross-sectional size and pile length. (2) The vertical bearing capacity of pipe piles and H-shaped steel piles is also significantly better than that of C-shaped steel piles and trough-shaped steel piles. Moreover, the compressive and tensile bearing performance of H-shaped steel piles is positively correlated with cross-sectional size and pile length. When the length of pile is the same, the vertical bearing capacity of H-shaped steel piles is similar to that of pipe piles. (3) The bearing performance of H-shaped steel piles is more prominent compared to other pile types (C-shaped steel piles, trough-shaped, and pipe piles) in sandy soil area. Furthermore, when compared with traditional pipe piles, H-shaped steel piles requires less materials and can create greater economic value, making them an excellent choice for the foundation of desert photovoltaic bracket foundations. The research results in this paper have reference for engineering applications.

       

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