›› 2013, Vol. 34 ›› Issue (S2): 257-264.

• 岩土工程研究 • 上一篇    下一篇

渠道抗冻胀垫层设计方法研究与数值模拟

安 鹏1,邢义川1,张爱军2,朱彭涛2   

  1. 1. 中国水利水电科学研究院,北京 100048;2. 西北农林科技大学 水利与建筑工程学院,陕西 杨凌 712100
  • 收稿日期:2013-03-13 出版日期:2013-11-11 发布日期:2013-11-19
  • 通讯作者: 邢义川,男,1956年生,博士,教授级高工,主要从事特殊土工程理论与计算方面的研究工作。E-mail:xingych@iwhr.com E-mail:anpeng110@163.com
  • 作者简介:安鹏,男,1985年生,博士研究生,主要从事特殊土工程理论与计算方面的研究工作。
  • 基金资助:

    “十二五”国家科技支撑项目(No.2011BAD25B04);国家自然科学基金项目(No.51279171)。

Study of design method and numerical simulation for anti-frost heave cushion of canal

AN Peng1,XING Yi-chuan1,ZHANG Ai-jun2,ZHU Peng-tao2   

  1. 1.China Institute of Water Resources and Hydropower Research, Beijing 100048, China; 2.College of Water Resources and Architectural Engineering, Northwest A & F University, Yangling, Shaanxi 712100, China
  • Received:2013-03-13 Online:2013-11-11 Published:2013-11-19

摘要: 基土换填是常用的抗冻胀措施。目前非冻胀性土缺乏科学标准的定义,换填厚度基本按照经验公式和工程类比确定,不尽科学合理。在对垫层抗冻胀机制的分析基础之上,根据层状土毛管水土水势理论给出了垫层材料的选择依据,结合热阻等效原理在考虑了衬砌结构允许位移的基础上给出了渠道垫层厚度的计算公式,并根据传统算法与该方法对山东打渔张北干渠弧形坡脚梯形渠道进行抗冻胀垫层设计;同时采用ANSYS有限元软件对渠道铺设垫层前后进行热力耦合数值模拟。研究表明,垫层通过改善水分场、温度场削弱了冻胀发生的因素;该垫层算法比传统算法合理、工程造价较低。数值分析表明,渠道冻胀量、冻胀力明显被削减,其中对阴坡的削减可达90%以上。

关键词: 渠道, 设计方法, 抗冻胀垫层, 数值模拟

Abstract: Non-heaving soil is widely used as cushion material for filling the canal foundation naturally made up by frost heave soil in North China. The design of the cushion is not as appropriate since non-heaving soil has not been technically defined; and thickness of the cushion relies heavily on empirical design. Frost heaving of coarse grained soil is mainly affected by the particle size, water content and groundwater level. Initial water content of frost heaving and the ability to stop capillary water from rising should be taken into consideration when choosing the right cushion material. This paper puts forward a method for choosing cushion material according to capillary water potential in layered soil based on the analysis of frost heaving resistant mechanism of cushion. The method includes two criteria, relationships between groundwater level and effective grain size and the coefficient of nonuniformity respectively. Working conditions of the design are given by assuming the most critical water content after investigation of canal working conditions in winter. After considering the allowable displacement of lining structure, the formula for thickness of canal cushion is deduced basing on thermal resistance equivalent principle. Both traditional and the proposed methods are used in the design of trapezoidal canal with curved-toe slope of Dayuzhang North main canal in Shandong province. The calculation results by the proposed approach are the same with those by the traditional calculation method which selects minimum displacement rate, but reduced 27cm of cushion compared with the traditional method which selects maximum displacement rate. Average surface temperature and frost heaving ratios of canal were measured during freezing period. Frozen soil can be considered as negative thermal expansion materials whose negative linear expansion coefficient is the ratio of frost heaving ratios and the average temperature. Elastic moduli and Poisson's ratios of frozen soil and frozen sand in different temperatures are selected which are widely used in other literatures. Meanwhile, the finite element software ANSYS was applied to simulate thermal-mechanical coupling process before and after laying cushion. The results show that the cushion can undermine frost heaving by improving temperature field and moisture field. Numerical analysis indicates that frost heaving and frost-heave force of the lining structure are apparently reduced, up to 90% at the shady slope.

Key words: canal, design method, anti-frost heave cushion, numerical simulation

中图分类号: 

  • TU 411
[1] 李翻翻, 陈卫忠, 雷江, 于洪丹, 马永尚, . 基于塑性损伤的黏土岩力学特性研究[J]. 岩土力学, 2020, 41(1): 132-140.
[2] 夏 坤, 董林, 蒲小武, 李璐, . 黄土塬地震动响应特征分析[J]. 岩土力学, 2020, 41(1): 295-304.
[3] 郭院成, 李明宇, 张艳伟, . 预应力锚杆复合土钉墙支护体系增量解析方法[J]. 岩土力学, 2019, 40(S1): 253-258.
[4] 闫国强, 殷跃平, 黄波林, 张枝华, 代贞伟, . 三峡库区巫山金鸡岭滑坡成因机制与变形特征[J]. 岩土力学, 2019, 40(S1): 329-340.
[5] 刘红岩. 宏细观缺陷对岩体力学特性及边坡稳定影响研究[J]. 岩土力学, 2019, 40(S1): 431-439.
[6] 金爱兵, 刘佳伟, 赵怡晴, 王本鑫, 孙浩, 魏余栋, . 卸荷条件下花岗岩力学特性分析[J]. 岩土力学, 2019, 40(S1): 459-467.
[7] 韩征, 粟滨, 李艳鸽, 王伟, 王卫东, 黄健陵, 陈光齐, . 基于HBP本构模型的泥石流动力过程SPH数值模拟[J]. 岩土力学, 2019, 40(S1): 477-485.
[8] 吴锦亮, 何吉, . 岩质边坡动态开挖模拟的复合单元模型[J]. 岩土力学, 2019, 40(S1): 535-540.
[9] 吴凤元, 樊赟赟, 陈剑平, 李军, . 基于不同侵蚀模型的高速崩滑碎屑 流动力过程模拟分析[J]. 岩土力学, 2019, 40(8): 3236-3246.
[10] 孙峰, 薛世峰, 逄铭玉, 唐梅荣, 张翔, 李川, . 基于连续损伤的水平井射孔-近井筒三维破裂模拟[J]. 岩土力学, 2019, 40(8): 3255-3261.
[11] 穆锐, 浦少云, 黄质宏, 李永辉, 郑培鑫, 刘 旸, 刘 泽, 郑红超, . 土岩组合岩体中抗拔桩极限承载力的确定[J]. 岩土力学, 2019, 40(7): 2825-2837.
[12] 金俊超, 佘成学, 尚朋阳. 基于应变软化指标的岩石非线性蠕变模型[J]. 岩土力学, 2019, 40(6): 2239-2246.
[13] 张 聪, 梁经纬, 阳军生, 曹 磊, 谢亦朋, 张贵金, . 堤坝脉动注浆浆液扩散机制及应用研究[J]. 岩土力学, 2019, 40(4): 1507-1514.
[14] 严 健, 何 川, 汪 波, 蒙 伟, . 高地温对隧道岩爆发生的影响性研究[J]. 岩土力学, 2019, 40(4): 1543-1550.
[15] 李世俊, 马昌慧, 刘应明, 韩玉珍, 张 彬, 张 嘎, . 离心模型试验与数值模拟相结合研究 采空边坡渐进破坏特性[J]. 岩土力学, 2019, 40(4): 1577-1583.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] 楚锡华,徐远杰. 基于形状改变比能对M-C准则与 D-P系列准则匹配关系的研究[J]. , 2009, 30(10): 2985 -2990 .
[2] 刘豆豆,陈卫忠,杨建平,谭贤君,周喜德. 脆性岩石卸围压强度特性试验研究[J]. , 2009, 30(9): 2588 -2594 .
[3] 王桂尧,李 斌,罗 军,付宏渊. 粉土基质吸力的新型量测装置与土-水特征研究[J]. , 2010, 31(11): 3678 -3682 .
[4] 卢应发,陈朱蕾,谢文良,吕志中. 垃圾卫生填埋中的一些岩土工程技术[J]. , 2009, 30(1): 91 -98 .
[5] 王志萍,胡敏云,夏玲涛. 垃圾填土压缩特性的室内试验研究[J]. , 2009, 30(6): 1681 -1686 .
[6] 贾 强,应惠清,张 鑫. 锚杆静压桩技术在既有建筑物增设地下空间中的应用[J]. , 2009, 30(7): 2053 -2057 .
[7] 路军富,王明年,贾媛媛,喻 渝,谭忠盛. 高速铁路大断面黄土隧道二次衬砌施作时机研究[J]. , 2011, 32(3): 843 -848 .
[8] 王成华,安建国. 含扩径桩的群桩基础竖向承载性状数值分析[J]. , 2011, 32(S2): 580 -585 .
[9] 方 焘 ,刘新荣 ,耿大新 ,罗 照 ,纪孝团 ,郑明新 . 大直径变径桩竖向承载特性模型试验研究(I)[J]. , 2012, 33(10): 2947 -2952 .
[10] 胡万雨 ,陈向浩 ,林 江 ,况磊强 . 瀑布沟水电站砾石土心墙初次蓄水期原位钻孔渗流试验研究[J]. , 2013, 34(5): 1259 -1263 .