黄土地区螺旋锚基础承载力试验研究

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中图分类号：TU473.1 文献标志码：A 文章编号：1000-4939（2025）04-0828-11

Abstract：In order to study the bearing characteristics of helical anchors under vertical loads in loess areas，in situ tests were first conducted under tension/compresson loads to obtain the ultimate bearing capacity of a single helical anchor.Then a finite element model of the helical anchor-soil system was established to analyze the variation of axial force and the influencing factors on bearing capacity.Finally，a calculation method for the ultimate vertical pulout bearing capacity of deep-buried helical anchors in loess was established.The results show that soil properties have a significant impact on the bearing capacity of helical anchors，and the bearing capacity of helical anchors decreases significantly with the increase of soil moisture content.Under the uplift condition，the proportion of load shared by the anchor plate accounts for over 90% of the load on the helical anchor foundation，while under the compression condition，the proportion of load shared by the anchor plate accounts for over 75% of the load on the helical anchor foundation，and the tip resistance accounts for 15%-17% . The results of the calculation method for the single anchor pullout bearing capacity are in good agreement with the experimental results of this article and other scholars. Key Words： pile foundation；screw anchor; field in situ test；ultimate bearing capacity； load-bearing characteristic

螺旋锚是将螺旋叶片焊接在锚杆上的一种微型桩，通过旋钮的方式钻入土中，同时可以承受抗压/抗拔。（剩余11770字）