季节性冻土地区渠道防渗防冻胀新材料及应用

New materials and their application for canal anti-seepage and anti-frost heave in seasonal soil frozen areas

渠道冻胀及其防治是我国季节性冻土地区灌区渠道防渗工程建设与管理运行中的一个突出问题。本文分析了我国渠道防渗防冻胀技术发展中存在的混凝土刚性衬砌防渗渠道冻胀破坏严重,渠道衬砌施工机械化程度较低,渠道衬砌防渗对当地生态效益有一定的负面影响等问题,总结了近年来几种性能优良、施工简单、满足环保要求、应用效果较好的防渗防冻胀新材料,主要从防渗性和抗冻性的角度对其进行了评价,并通过实际工程应用及相关实验结果的分析比较,总结出这些新材料的适用性及应用形式,对渠道防渗防冻胀新材料的推广应用具有一定的指导意义。

Canal frost heave and its prevention is a major problem of canal projects for both construction and management in the seasonal frozen soil areas of north China.This article analyzed several existence problems in the development of technologies in this field： the rigid canal lining is heavily damaged by frost and bloated in canals;the construction technologies are lowly mechanized;the canal anti-seepage methods have some negative effects on the local ecological environment.To solve such problems,this article introduced several newly applied materials which have nice features,can be easily used and turn out to be environmentally friendly and efficience in practice.Then it evaluated them according to the ability to protect canals from seepage,frost and bloated.In addition,it provided the applicability and application forms of the new materials after analyzing their performances in practice and the results of related researches.This article can provide guidance for the application of these new materials in canal seepage control,frost and bloated prevention.