【摘要】：太沙基土拱理論已廣泛應(yīng)用在隧道結(jié)構(gòu)的受力計(jì)算中,但太沙基公式中涉及的計(jì)算寬度、側(cè)壓力系數(shù)和摩擦系數(shù)以及土拱模式尚未得到充分的理論解釋和實(shí)驗(yàn)驗(yàn)證,工程技術(shù)人員對(duì)模型參數(shù)的物理意義認(rèn)識(shí)不夠清楚,參數(shù)選擇不夠準(zhǔn)確。文章詳細(xì)分析了計(jì)算寬度、側(cè)壓力系數(shù)和摩擦系數(shù)以及土拱模式的物理意義,對(duì)比了這些參數(shù)之間的異同,給出了選擇不同的參數(shù)對(duì)土壓力計(jì)算結(jié)果的影響。分析計(jì)算表明:計(jì)算寬度和土拱模式的選擇對(duì)土壓力具有較大的影響,應(yīng)該根據(jù)實(shí)測結(jié)果選擇計(jì)算寬度和土拱模式或者在施工擾動(dòng)范圍較大時(shí)選擇更大的計(jì)算寬度和更保守的土拱模式;選取主動(dòng)土壓力系數(shù)是偏于安全的;摩擦角的選取對(duì)土壓力也有較大影響,建議選擇臨界摩擦角或者臨界摩擦角的一半進(jìn)行計(jì)算。
[Abstract]:The soil arch theory of Taishaji has been widely used in the stress calculation of tunnel structure, but the calculation width, the coefficient of lateral pressure, the coefficient of friction and the model of soil arch have not been fully explained and verified by experiments. The physical meaning of the model parameters is not clear enough, and the selection of the parameters is not accurate enough. In this paper, the physical meaning of calculating width, coefficient of lateral pressure, coefficient of friction and model of soil arch are analyzed in detail, the similarities and differences between these parameters are compared, and the influence of choosing different parameters on the calculation results of earth pressure is given. The analysis and calculation show that the calculation width and the selection of soil arch mode have great influence on the earth pressure. The calculated width and the soil arch mode should be selected according to the measured results, or the wider calculation width and the more conservative soil arch mode should be selected when the construction disturbance range is large, and the active earth pressure coefficient should be selected for safety. The selection of friction angle also has great influence on the earth pressure. It is suggested that the critical friction angle or half of the critical friction angle be chosen for calculation.
【作者單位】： 中國地質(zhì)大學(xué)(武漢)工程學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(51074144)
【分類號(hào)】：U451

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1 強(qiáng)小俊;趙有明;張長生;;樁承地基土拱高度計(jì)算方法的研究及分析[J];鐵道建筑;2012年05期

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本文編號(hào)：2165113