天然建筑材料——砂砾石的普查与勘探工作,在水利建设工程地质勘测中占相当重要的地位,因为水工混凝土建筑物的造价,在某种程度上,就取决于建筑材料的质量、储量以及开采运输条件,也取决于建筑材料产地距离施工场地的远近;同时,其他附属建筑物如:铁路、公路、混凝土拌合楼等的位置与交通路线的铺设也决定于砂石材料的产地。 Natural building materials - gravel survey and exploration work in water conservancy construction engineering geological survey occupies a very important position, because the cost of hydraulic concrete buildings, to some extent, depends on the quality of construction materials, reserves As well as mining and transportation conditions, but also depends on the distance of construction materials from the construction site; at the same time, the location of other ancillary buildings such as railways, highways and concrete mixing buildings and the laying of traffic routes also depend on the origin of gravel materials.