渠道工程中保温板防冻胀设计  

Anti-frost heave design in channel engineering by insulation board

作　　者：刘志斌[1] 刘建军[1] 

机构地区：[1]石河子大学水利建筑工程学院,新疆石河子832000

出　　处：《人民长江》2012年第20期29-31,共3页Yangtze River

摘　　要：我国北方大部分地区都属于季节性冻土地区,输水渠道经常会由于地基的冻胀而遭到不同程度的破坏。目前虽有不少地区的输水渠道采用了聚苯乙烯保温板防冻胀措施,而且取得了一定的效果,但聚苯乙烯保温板防冻胀设计还处在初级阶段。提出渠道工程中保温板防冻胀的设计方法,首先介绍了聚苯乙烯保温板的物理、力学以及冻融循环特性;然后论述了干燥和湿润状态下如何选取保温板厚度;最后结合工程实例说明了设计过程。对同类工程的设计有参考借鉴意义。Most areas of northern China belong to the seasonal frozen soil zone,the water conveyance channels in this area are often damaged by frost heave of channel foundation.At present,although polystyrene insulation board is used to prevent the frost heave in many areas and certain result is obtained,its design is still in initial stage.The design method of anti-frost heave for channel by polystyrene insulation board is put forward.The characteristics of physics,mechanics and freezing and thawing cycle are introduced,and the method of selecting the polystyrene insulation board thickness is expounded under dry and wet states.The design process is demonstrated by a practical case,which has reference to the design of similar projects.

关 键 词：冻胀 保温板 设计 渠道 

分 类 号：P642[天文地球—工程地质学]