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    張明聚  宋二祥  陳肇元
    （清華大學(xué)土木工程系 北京 100084）

[提要]  在分析總結(jié)現(xiàn)有土釘及其與土體粘結(jié)滑移的工作性能試驗(yàn)研究基礎(chǔ)上，建立土釘及其與土體粘結(jié)滑移的有限元模型，經(jīng)推導(dǎo)給出單元?jiǎng)偠染仃囷@式，并直接用于進(jìn)一步的有限元分析。工程實(shí)例計(jì)算表明，基坑水平位移和土釘最大拉力與實(shí)測結(jié)果基本吻合。
[關(guān)鍵詞]  有限元 土釘 粘結(jié)滑移 單元?jiǎng)偠染仃?/p>

On the basis of summary and analysis on the experimental investigation associated with soil nails and
their adhesion-slip interaction with soil, the models of soil nails and their adhesion-slip interaction with
soil were erected and the element stiffness matrices were derived in direct formulations. Furthermore,
the matrices were incorporated directly in the finite element analysis of soil nailed structures, and the
analysis results of an engineering case were presented. The agreement between the measured and the predicted movements is good.
Keywords: finite element method; soil nail; adhesion-slip interaction; element stiffness matrix