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最近学习铁路隧道設計规范,发現第97条所列之双錐竖井壁座高度計算公式: 推导上多有错,以往一般文献书籍上所列之双锥壁座计算公式亦如隧规所示形式。按此公式则在垂直方向不能满足静力平衡条件,正确的应将式中csoβ項改为cso~2β而成为現推导如下: 双錐壁座受力情况如右图所示,設已知:壁座之間距为H,堅井衬砌厚度为d,衬砌材料的容重为γ。則如不計井壁与岩层之間的摩
Recently studied the design specifications of the railway tunnels and found that the 97th column of double cone vertical shaft wall height calculation formula: deduced on the more wrong, in the past the general literature books listed double cone wall seat formula is also as shown form. Press this formula in the vertical direction can not meet the static balance conditions, the correct type of csoβ should be changed to cso ~ 2β and is now derived as follows: double cone wall seat force as shown on the right, is known: The distance between wall seats is H, the thickness of well lining is d, and the bulk density of lining material is γ. If we do not consider the friction between the wall and rock formation