摘要
在调查研究的基础上介绍了北京地区水利工程建筑物的冰压力和冰推力冻害、水工混凝土冻融冻害和冻土冻害的状况与特征,分析了产生各种冻害的外部环境和工程条件。对近30年来各种渠道衬砌工程的运用情况和抗冻性能进行了系统分析与评价,探讨了各种冻害的治理方法和研究途径。通过对北京地区预制混凝土板衬砌渠道冻胀规律的分析,提出了衬砌渠道设计换填深度的计算方法。
On the basis of investigations,the characteristics of frostbite caused by ice pres- sure,ice thrust,concrete freezing and thawing,and earth freezing in the engineering struc- tures for water conservancy in Beijing area are described.The environmental and engineer- ing factors which result in different frostbites are analyzed.A systematic approach is con- ducted to analyze and evaluate the performance and frost resistance of channel lining in re- cent 30 years as well as the various control methods against the frostbites.A computation method for soil-sand exchange depth is presented based on analysis of frost heave of prefab- ricated concrete channel lining in Beijing area.
关键词
冻害
冻土
冻融
水利工程
建筑物
water conservancy structure
frostbite
Beijing area
freezing earth
freezing thawing
frost heave
channel lining
