论文部分内容阅读
过去,大庆油田的建设工程,一般是在3月份开始施工。首先把管线运到现场,进行焊接,然后再挖沟下管。大庆地区的输油管线,一般要求埋深-1.2～-1.4米(以自然地坪为±0.00米计);注水管线则要求埋深-2.0～-2.2米。由“大庆地区年平均最大冻深图”所示的土壤解冻曲线看,土壤化冻深度在5月20日以后才能达到-1.2米。因此,埋设输油管线的管沟,一般是在5月20日以后开挖,而埋设注水管线的管沟,是在6月20日开挖。这样,将产生以下问题:
In the past, the construction of Daqing Oilfield was started in March. First of all the pipelines to the scene, the welding, and then ditch the next pipe. Daqing oil pipeline, the general requirements of buried depth of -1.2 ~ -1.4 m (with natural floor is ± 0.00 meters); water pipelines require depth -2.0 ~ -2.2 m. According to the soil thawing curve shown in “Annual Average Maximum Deep Frozen Depth Map of Daqing Region”, soil thaw depth can not reach -1.2 meters after May 20. As a result, pipe ditches for laying oil pipelines are generally excavated after May 20, while pipe ditches for laying water pipelines are excavated on June 20. In this way, the following problems will arise: