A field study on the behavior of micropiles in clay under compression or tension
A field study on the behavior of micropiles in clay under compression or tension
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DOI：
10.1139/t05-089
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发表时间：
2006
影响因子：
3.6
通讯作者：
Jie Han;S. Ye
中科院分区：
文献类型：
--
作者：
Jie Han;S. Ye
微型桩已被用于支撑建立在有问题的土壤上的现有基础，受到地下活动（如隧道）的干扰，或受到额外的负载（如增加到现有建筑物的楼层）。通过现场试验研究了微型桩在软土中的抗拉和抗压特性。对4根微型单桩进行了2次抗压和2次抗拉试验。所有微型桩都装有钢筋应变计，并在加载过程中进行监测。为了建立配套文件中提出的托换荷载试验的基线，在天然土壤上进行了全尺寸荷载试验。本文介绍并分析了所有这些足尺加载试验的结果。本文讨论了微型桩的荷载-位移反应、弹性模量、轴力、桩端阻力和桩侧摩阻力以及微型桩与软土的相互作用。轴承箱的理论解
Micropiles have been used for underpinning existing foundations founded on problematic soil, disturbed by the intrusion of underground activities (such as tunneling), or subjected to additional loads (such as stories added to existing buildings). This paper presents a field study on the behavior of single micropiles in soft clay subjected to compression or tension. Two compression and two tension loading tests were conducted on four single micropiles. All the micropiles were instrumented with rebar strain gauges, and they were monitored during the progress of loading. To set up a baseline for underpinned loading tests presented in a companion paper, a full-scale loading test was performed on natural soil. The results from all these full-scale loading tests are presented and analyzed in this paper. The paper discusses loaddisplacement responses, elastic moduli, axial forces, tip resistance, and skin friction relating to micropiles and their interactions with soft clay. Theoretical solutions for bearing ca...