- 摘 要
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燕 彬1,2 黃 義1
（1 西安建筑科技大學(xué) 710055； 2 濟(jì)南大學(xué) 250022）[提要] 在彈性支點法有限元正分析的基礎(chǔ)上，利用非線性規(guī)劃中的最優(yōu)化方法——單純形加速法，采用直接反分析法對深基坑被動土體參數(shù)m值作了反分析；而且利用反分析所得參數(shù)m值進(jìn)行了有限元正分析，以預(yù)測下一開挖階段可能產(chǎn)生的側(cè)向位移，均獲得較滿意結(jié)果。
[關(guān)鍵詞] 彈性支點法 單純形加速法 m值 反分析The soil parameter-m-value is studied for excavation engineering by means of the method of back-analysis, with the simplex method included mathematical optimization, which is based on FEM( finite elements method)analysis of the elastic-reaction method. The FEM analysis is conducted, based on the m-value from back-analysis, to predict the lateral displacement of foundation pits in the stage of excavation, and satisfactory results are abtained.
Keywords: elastic-reaction method; simplex method;m-value; back-analysis; foundation pits
