台后活载侧压力α、ε系数值的计算是桥台设计中不可缺少的部分。《铁路工程技术规范·桥涵篇》(以下简称《桥规》)附录七列出了单线桥台侧压力计算公式: E=qαHλB (吨) (1) 侧压力E的着力点距计算截面距离 C=εH (米) (2) 当H、B、λ都确定以后,公式计算的繁简就取决于系数α、ε的计算。《林区窄轨铁路设计技术规程》(以下简称《林规》)附录二亦列出了类似的公式。若H_1=0,台背为竖直坡或斜坡角≤30°时:枕木长L=2.5米,α、ε可直接查用《桥规》附录七表1;枕木长L=1.5米,α、ε可 The calculation of the α, ε coefficient values ​​of the live load side pressure is an indispensable part of abutment design. Appendix 7 of “Technical Specifications of Railway Engineering, Bridge Culvert” (Appendix VII) lists the calculation formula of lateral pressure of single-line abutment: E = qαHλB (ton) (1) Focal point distance of lateral pressure E Calculated section distance C = εH (m) (2) When H, B, λ are determined, the formula to calculate the complexity depends on the coefficient α, ε calculation. A similar formula is set out in Appendix II of “Technical Regulations for Design of Narrow-gauge Railway in Forest Zone” (hereinafter referred to as “Lin Gou”). If H_1 = 0, the back of the table is vertical or the slope angle is less than or equal to 30 °: the length of the sleeper L = 2.5m, α, ε can be directly checked the “bridge gauge” Appendix VII Table 1; , Ε can be