管道浅埋问题,对土壤冻结的最大深度大于为防止压坏的最小埋深的所有地区都存在。仅就排水管道而言,应按排水的不同来采取不同对待方式。单纯雨水,可不考虑冰冻问题;生产废水,应视水质水温的差异而有所区别。至于生活污水,则由于它的特点,其浅埋问题早已为人们所注意;早在五十年代,苏联就曾提供过排水管网中有关的浅埋数据。生活污水冰点低于0℃。不易冻;排出时温度常在7℃以上,流经的沟管又是不良传热体[例如水泥管、陶土管、石棉水泥管的传热系数分别为0.7～1.1、0.52、0.17～0.21kcal/(m~2·h·℃)——0.81～1.3、0.60,0.20～0.24 W/(m~2·K)]。所 The problem of shallow burial of pipelines exists for all regions where the maximum depth of soil freezing is greater than the minimum depth of burial to prevent crumple. As far as drainage pipes are concerned, different treatment methods should be adopted according to different drainage. Pure rain, regardless of the freezing problem; production wastewater, should be based on the difference between water temperature and temperature. As for the domestic sewage, due to its characteristics, its shallow burial problem has long been noticed by people; as early as the 1950s, the Soviet Union had provided relevant shallow burial data in the drainage network. The freezing point of domestic sewage is below 0°C. Difficult to freeze; discharge temperature is often above 7 °C, the flow through the pipe is a bad heat transfer body [such as cement pipe, clay pipe, asbestos cement pipe heat transfer coefficient were 0.7 ~ 1.1, 0.52, 0.17 ~ 0.21kcal / (m ~ 2 · h · °C) - 0.81 ~ 1.3, 0.60, 0.20 ~ 0.24 W / (m ~ 2 · K)]. By