近几年发展起来的保温垫层法防止衬砌渠道冻胀破坏措施，已在山东、山西、北京、辽宁、河南、河北、新疆、甘肃等十几个北方省、市、自治区推广应用。已由试验、推广阶段发展到跨地区、跨流域的大型输水干渠和国家重点项目南水北调输水工程。实践证明，利用聚苯乙烯泡沫板... In recent years, the developed insulation cushion method to prevent the destruction of lining channel frost heaving has been in Shandong, Shanxi, Beijing, Liaoning, Henan, Hebei, Xinjiang, Gansu more than a dozen of the northern provinces, municipalities and autonomous regions to promote the application. It has been developed from tests and promotion phases to large-scale water conveyance ditches across regions and across river basins and the water transfer project of South-to-North Water Diversion Project, a national key project. Practice has proved that the use of polystyrene foam board ...