挤塑聚苯板在混凝土衬砌渠道冻胀防治中的应用  

The Application of Extruded Polystyrene Boards in Frost Heaving Prevention of Concrete Lining Channel

作　　者：鹿翔宇 刘仰玉 卞汉兵[1,3] 孙兆辉 王宸宇[1] 邱秀梅 LU Xiang-yu;LIU Yang-yu;BIAN Han-bing;SUN Zhao-hui;WANG Chen-yu;QIU Xiu-mei(College of Water Conservancy and Civil Engineering, Shandong Agricultural University, Taian, Shandong 271000, China;Linyi Hengtai Safety Technology Co. Ltd., Linyi 276000, China;Polytech-Lille Institute, University of Lille, France)

机构地区：[1]山东农业大学水利土木工程学院,山东泰安271000 [2]临沂市恒泰安全科技有限公司,山东临沂276000 [3]法国里尔大学综合理工工程师学院,法国

出　　处：《山东农业大学学报（自然科学版）》2019年第3期460-467,共8页Journal of Shandong Agricultural University：Natural Science Edition

基　　金：山东省重点研发计划项目:渠道衬砌冻融破坏机理与工程防治措施研究(2017GSF16104)

摘　　要：针对季节性冻土区山东省聊城市位山灌区混凝土衬砌渠道的冻融破坏问题,利用 ANSYS 有限元软件建立铺设不同厚度挤塑聚苯板的混凝土衬砌渠道模型,计算其瞬态温度场分布和位移场分布,并结合相关实测数据进行分析。结果表明,经一年持续观测,在日最低气温随时间变化的外界环境条件下,不论是否铺设挤塑聚苯板,最大冻结深度出现的时间相对于年最低气温出现的时间来说均具有滞后性。通过对铺设不同厚度挤塑聚苯板渠道产生的冻胀量和渠基土的冻结深度进行比对分析,得出挤塑聚苯板的保温作用原理,推测选用 5 cm 挤塑聚苯板对该灌渠进行冻胀防治已满足工程要求。本研究加入了瞬态温度场计算,这一方案具有一定的先进性,可为今后混凝土衬砌渠道冻胀防治研究提供参考。In view of freeze-thaw damage on concrete-lined channel in Weishan Irrigation District, Liaocheng, Shandong located in the seasonal permafrost region, ANSYS finite element software was utilized to establish a concrete-lined channel model laid with extruded polystyrene (XPS) board of varying thicknesses in order to figure out the transient temperature field distribution and displacement field distribution. Corresponding measured data were also combined to facilitate the analysis. The results indicate after one-year persistent observation and measurement, the appearance of maximum frozen depth lagged somewhat behind the annual lowest temperature arrival no matter whether XPS board was laid when the daily lowest temperature changed over the time. A comparative analysis of frozen volume from channel laid with varying-thickness XPS board as well as frozen depth of soil at the bottom of the channel revealed the insulating mechanism of XPS board. It was assumed that selection of 5cm-thick XPS board to deal with local frost heaving problem could meet the engineering requirements. In this study, transient temperature field calculation was added. This plan is of certain strengths and it can shed some light on future research about frost heaving prevention and control in concrete-lined channels.

关 键 词：混凝土衬砌渠道 冻胀防治 数值模拟 挤塑聚苯板(XPS) 

分 类 号：TU757.4[建筑科学—建筑技术科学]