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依据力学原理,对卵形(蛋拱状)断面隧道拱圈支承力的传递方式进行了系统分析,总结出了卵形(蛋拱状)断面隧道拱圈支承力衰减的基本规律,即△N_j=N_o[β-sinβ_jsinε_j]。式中N_o为拱底支承力,△N_j为拱圈上任一点j的支承力度减量,β_j为A_j线(过j点拱圈的切线)与A_(oj)线(过拱底及j点的直线)的夹角,为A。线(过拱底O的拱圈切线与A_(oj)线的夹角)。公式的适用范围为拱底到拱顶的半个拱圈。
According to the mechanics principle, the transmission of supporting force of the arch ring of the oval (egg arch) cross section tunnel was systematically analyzed, and the basic law of the decay of bearing capacity of the arch ring in the oval (egg arch) section was summarized, that is, △ N_j = N_o [β-sin β_j sinε_j]. Where N_o is the supporting force at the bottom of the arch, ΔN_j is the supporting force decrement at any point j on the arch ring, β_j is the difference between the A_j line (the tangent of the arch circle over the point j) and the line A_ (oj) Straight line) of the angle, Line (over the arch O arch tangent and A_ (oj) line angle). The range of application of the formula is from the arch to the arch half a circle.