Thermal Insulation Analytical Study On Shallow Cover Up Feedwater Piping Under Frozen Soil Environment At Qingzang Railway

It was one term momentous engineering, whereas shallow burring pipe heat preservation ensure water supply normal parameter clause against that at Qing zang railway frozen soil environment carry into execution pipe shallow cover up water supply. For guarantee piping water supply failure-free operation (namely prevent pipe internal water occur frozen) and prevent pipeline rejection of heat versus frozen soil environmental influence, piping insulation computational analysis and appraise is ordinary important one loop, above all insulating layer hull skin temperature dam pipeline heat affecting sphere command cum appraise back up of Qinghai-Tibet Plateau compare specific frozen soil environment down. This article direct these two purpose proceed know clearly piping insulation figure and analyses.Findings show that, for be in the wrong frozen soil wrought in favor of thermal disturbance, insulating layer thickness respond adopt dam insulating pipe hull skin temperature 'calculation procedure. It was feasible that at shallow cover up water supply line insulation design middle, claim do with hull skin temperature design down. Hull skin temperature too low, toward hot water (contain high temperature water) shallow buried pipe way. Freeze-thaw circle radii size have a bearing upon in commercial tubes besides medium temperature, said circle met remit frozen-heave force, thereof impact section went over large, pipeline went over security of the ought stress consider pipeline environmental oil circle problem.Feed water piping at seasonally frozen ground layer middle secure medium temperature for -4~-5°C, at the same time need for take edaphic frost heave gender, at ascertain depth of burial time ask held over attention for into consideration to.It was multifactor acting outcome that seasonally frozen ground mesne feed water piping general unease occur ice up, even at raw water temperature for 0.4 °C time, impact feed temperature metabolic factor a great many, feed water heat drop.Be on the depth of burial time, then respond mostly take pipeline and frost line ppm compartment 'relation, whereas pipeline personal property (material quality, caliber wait), at pipe network mesne action and exogenous factors wait here again ascertain pipeline and frost line relation' some kind of factor as well into...