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摘要:
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本文之主要目的在于模拟海域之钢管单桩,以静态方法来探讨置入饱和砂土中之模型基桩承受扭力荷重之反应行为。研究分为两部分进行,一为实验研究:八根模型钢管桩或以打桩机打设于饱和砂土中,或以埋入方式埋置于饱和砂土中。采用静态方法之方式分析计算海域钢管单桩的承载力。另一研究为数值模拟,将基桩分为以内弹簧连接之集中质量,而基桩与土壤互制作用,则以Winkler模型模拟。研究结果显示,海域钢管单桩,在相同长度下,长细比愈小其扭力承载力愈大。对相同长细比的单桩而言,具有开口桩趾之基桩较具有闭口桩趾之基桩有较大的承载力。一般而言,传递至砂土的扭力随着深度增加而增加,但对打击具有开口桩趾之基桩而言,则底部会相对减少,此说明传递至砂土的扭力是为土壤有效应力和基桩的函数,另基桩承受扭力荷重之反应行为,可由轴向荷重试验推得之,反之亦然。
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参考文献:
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