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针对层状土质边坡在松散填土条件下的稳定性问题，研究双排螺旋钢桩的加固机理与设计方法。基于ABAQUS建立螺旋钢桩-边坡相互作用有限元模型，采用强度折减法确定潜在滑动面，系统分析桩间距、排距及桩顶顶板对桩群抗滑性能与变形特性的影响规律，并结合现场边坡加固工程典型断面进行数值验证与方案对比。结果表明：单排螺旋钢桩最优桩间距取4倍叶片直径（4D）时，群桩抗滑效率与桩身受力状态达到最优平衡；双排螺旋钢桩最优排距亦为4D，超过该值后抗滑力边际增益显著衰减；桩顶顶板刚性连接可降低桩顶位移13.3%，但对抗滑力提升仅约1.1%，其核心作用在于增强群桩整体抗侧刚度与变形控制能力，而非直接提高极限抗滑承载力。工程断面中双排螺旋钢桩（桩长12 m，嵌固比1.0）提供170.03 kN/m抗滑力，桩顶位移1.33 cm，安全系数1.356，满足规范要求。螺旋钢桩具有施工快捷、即刻承载、低碳经济等优势，是一种绿色高效的边坡加固技术。
Abstract：Regarding the stability issue of layered soil slopes under loose fill conditions, the reinforcement mechanism and design method of double-row helical steel piles were studied. Based on ABAQUS, a finite element model of the interaction between helical steel piles and the slope was established. The strength reduction method was used to determine the potential sliding surface. The influence laws of pile spacing, row spacing, and top plate on the antisliding performance and deformation characteristics of the pile group were systematically analyzed. Combined with typical sections of on-site slope reinforcement projects, numerical verification and scheme comparison were carried out. The results show that when the optimal pile spacing for single-row helical steel piles is set at 4 times the blade diameter(4D), the anti-sliding efficiency of the group of piles reaches the optimal balance with the pile body's stress state; for double-row helical steel piles, the optimal row spacing is also 4D. Beyond this value, the marginal increase in antisliding force significantly decreases; the rigid connection of the top slab at the pile top can reduce the pile top displacement by 13.3%, but only increases the anti-sliding force by approximately 1.1%. The core function lies in enhancing the overall lateral stiffness and deformation control ability of the group of piles rather than directly increasing the ultimate anti-sliding bearing capacity. In the engineering section, the double-row helical steel piles(pile length 12 m, embedded ratio 1.0) provide 170.03 kN/m anti-sliding force, with a pile top displacement of 1.33 cm and a safety factor of 1.356, meeting the specification requirements. The helical steel piles have the advantages of fast construction, immediate bearing capacity, and low carbon economy, and are a green and efficient slope reinforcement technology.
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基本信息:
中图分类号:U213.15
引用信息:
[1]刘阳阳,韩语,赖艺鹏,等.基于层状土质边坡的双排式螺旋钢桩加固研究[J].铁道建筑().
基金信息:
铁路基础研究联合基金(U2268213); 四川省青年科学基金(2026NSFSC1292)
2026-09-15
2026-09-15
2026-09-15