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《铁路工程技术规范·第二篇桥涵》(以下简称《桥规》)附录七计算竖向活载对涵洞的水平土压力强度 P 的公式是P=ζg(吨/平方米)(1)式中ζ——系数,填土采用0.25或0.35;q_h——在轨底以下深度 h(米)处,载的竖向压力强度(吨/平方米),按下式计算,q_h=(16.5)/(2.5+h)(2)(一)计算盖版涵边墙截面以往惯用的方法是按(1)、(2)式计算出墙顶和计算截面 m-m 的水平土压力强度:
“Technical Specifications for Railway Engineering, Part 2 Bridge and Bridge” (hereinafter referred to as “bridge gauge”) Appendix VII Formula for calculating horizontal earth pressure intensity P of vertical live load on culvert is P = ζg (t / m2) (1) Q_h - Vertical pressure intensity (t / m 2) at depth h (meters) below the foot of the rail, calculated as follows: q_h = (16.5) / (2.5 + h) (2) (1) The conventional method used to calculate the cross-section of the cover-type culvert wall is to calculate the horizontal earth pressure strength of the wall top and the calculated section mm according to (1) and (2)