黄土地区由于容易被雨水冲蚀,水土流失严重,很多深沟洪水流量并不大,但逐年受水冲刷,下切很快,因此形成很深的大沟,沟的上口很宽,公路跨越深沟时,采用什么形式的建筑物,是值得我们探讨的问题。一、跨沟建筑物的经济合理形式我们过去对跨越黄土深沟建筑物采取过坝式路堤的形式,很不理想,所谓坝式路堤,就是将原来的深沟用土坝全部堵塞,另在沟的一岸边坡上,根据洪水流量大小,设 The loess area is prone to be eroded by rainwater and its soil erosion is serious. Many of the deep-trench flood discharges are not large, but they are scoured and cut down very fast year by year. As a result, the deep gully is formed. Ditch, the use of what form of building is worth our discussion. First, the economic construction of cross-ditch buildings We used to cross the loess ditch buildings took the form of dam embankment is not ideal, the so-called dam embankment, that is, the original deep ditch earth dam all blocked, and the other in the ditch One side of the slope, according to the size of the flood flow, set