一、前言作用于刚性涵洞上的竖直土压力,因受填土的不均匀沉降等影响而大于覆土的重量。倘能降低这种土压,则可望设计出经济的涵洞。在日本北海道某高速公路上的一个区间内(线路概况见图1,略),设计了许多高填土涵洞,工程部门在系井东、札内两座涵洞工程中,于涵洞顶上敷设了“柔性材料”,进行降低竖直土压的试验。 I. INTRODUCTION The vertical soil pressure acting on rigid culverts is greater than the weight of soil cover due to the uneven settlement of fill. If we can reduce this earth pressure, it is expected to design economic culverts. In a section of a highway in Hokkaido, Japan, a lot of high-fill culverts are designed in a section of the expressway in Hokkaido, Japan. For the two culverts in the eastern part of the well and Zhane, the engineering department laid “ Flexible material ”to reduce vertical soil pressure test.