《南水北调与水利科技》：南水北调中线总干渠（河北段）混凝土衬砌防冻胀设计技术（严增才,李振卿）（摘要）

摘要：南水北调中线总干渠（河北段）混凝土衬砌防冻胀技术研究，发现了适合于浅层季节冻土区的冻结冻胀规律，建立了以工程地点水文地质条件和邻近气象台站气温资料为计算依据的冻深、冻胀量计算经验公式及三种保温层厚度计算方法，依据不同渠道混凝土衬砌结构的防冻胀效果，提出以允许不均匀变位系数和允许法向位移量作为渠道衬砌抗冻胀稳定性的要求条件以及典型衬砌结构的允许不均匀变位系数。在汇总试验研究成果的基础上，通过对中线工程总干渠沿线气候、水文地质、走向、环境等因素的综合分析，并结合已有的两个抗冻规范，提出适合于总干渠（河北段）混凝土衬砌防冻胀设计技术。

关键词：南水北调；中线工程；总干渠；混凝土衬砌；防冻胀设计技术

中图分类号：TV68；TV31 文献标识码：B 文章编号：1672-1683（2008）01-0176-06

Design Techniques for Anti-Freezing Expansion of the Concrete Lining in the Main Canal (Heibei Section) of the South-to-North Water Diversion Project

YAN Zeng-cai,LI Zhen-qing

(The Administrative Division of the Water Affairs of the Daqing River of Hebei Province,Baoding 071051,China)

Abstract:By research on the freezing expansion proof of the concrete lining in the main canal (Heibei section) of the South-to-North Water Diversion Project,some regulations governing the freezing expansion ratio for the soil in the seasonal freezing areas have been found.A set of empirical equations to calculate freezing depths and expansion amount based on the vicinity hydrological conditions and temperature informantion are produced with three calculating methods for disigning of the thickness of the freezing-proof layers.On different effects of the various concrete lining strnctures,it has been pointed out that the uneven shifting coefficient and normal displacement tolerance can be used as required conditions for stability of freezing expansion proof of the concrete lining,and also as the uneven shifting coefficient tolerance of the typical lining structure.The design techniques were proposed for anti-freezing expansion of the concrete lining suitable for the main canal section (Hebei section).

Key words:South-to-North Water Diversion Project;middle section project;main canal;concrete lining;disign techniques anti-freezing expansion

参考文献：

[1]SL23-91，渠系工程抗冻胀设计规范[S].

[2]SL211-98，水工建筑物工抗冰冻设计规范[S].

[3]丁德文，叶拔友.基础保温层厚度的确定方法[A].第三届全国冻土学术会议论文选集[C].北京：科学出版社，1989.

作者简介：严增才（1961-）男，河北泊头人，高级工程师，主要从事水利工程管理和科研工作。

来源：《南水北调与水利科技》2008年第1期