›› 2017, Vol. 38 ›› Issue (S1): 11-26.doi: 10.16285/j.rsm.2017.S1.002

• 基础理论与实验研究 • 上一篇    下一篇

土体龟裂研究方法

孙凯强,唐朝生,刘昌黎,李昊达,王 鹏,冷 挺   

  1. 南京大学 地球科学与工程学院, 江苏 南京 210023
  • 收稿日期:2016-09-27 出版日期:2017-06-22 发布日期:2018-06-05
  • 通讯作者: 唐朝生,男,1980年生,博士,教授,主要从事工程地质和环境岩土工程方面的研究工作。E-mail: tangchaosheng@nju.edu.cn E-mail:helloskq@163.com
  • 作者简介:孙凯强,男,1991年生,硕士研究生,主要从事工程地质方面的研究。
  • 基金资助:

    优秀青年科学基金(No.41322019);国家自然学科基金(No.41572246);国家自然科学基金重点项目(No.41230636);江苏省“青蓝工程”(2014年);中央高校基本科研业务费专项资金(2015年)。

Research methods of soil desiccation cracking behavior

SUN Kai-qiang, TANG Chao-sheng, LIU Chang-li, LI Hao-da, WANG Peng, LENG Ting   

  1. School of Earth Sciences and Engineering, Nanjing University, Nanjing, Jiangsu 210023, China
  • Received:2016-09-27 Online:2017-06-22 Published:2018-06-05
  • Supported by:

    This work was supported by the National Science Foundation for Excellent Young Scholars (41322019), the National Natural Science Foundation of China (41572246), Key Project of National Natural Science Foundation of China (41230636), and Qing Lan Project of Jiangsu Province(2014)and Fundamental Research Funds for the Central Universities(2015).

摘要: 土体龟裂是一种常见的自然现象,会对土体的工程性质产生显著的负面影响,是许多工程地质和环境地质问题的直接诱因,要研究龟裂,首先需要解决研究方法问题。基于国内外近些年围绕龟裂所开展的工作,着重对研究方法进行了系统的归纳和总结,对比分析了各种方法的优缺点,得到如下认识:(1)土体龟裂研究方法总体分为试验研究和数值模拟研究两大类,试验研究又可分为室内试验和现场试验,目前该课题主要以室内试验为主;(2)室内试验常用的试样主要有泥浆样和压实样两种,且前者更受学界欢迎;(3)土体龟裂试验主要涉及两方面的关键仪器设备,一方面是用于控制试验的环境条件,代表性的为环境箱,另一方面是用于监测龟裂发育过程的相关参数,尤其是裂隙几何形态参数,代表性的有图像采集装置、激光扫描仪、CT机、ERT和分布式光纤等;(4)在试验方法方面,多采用控制变量法研究一个或几个参数对土体龟裂形成及发育规律的影响,包括试样初始状态、尺寸大小、厚度、土质成分、环境温度、相对湿度、试样/容器接触条件和干湿循环次数等;(5)采用数字图像处理技术能快速提取龟裂网络的几何形态结构参数,较其他技术更具前景;(6)现场试验可以最大限度的反映真实裂隙的形成和发育规律,但由于这类试验费时费力投入大等客观原因,报道相对较少;(7)数值模拟是研究土体龟裂的重要手段之一,但由于现阶段关于龟裂发育机制没有统一认识,相关研究还处于起步阶段。最后,针对当前的研究不足提出了今后土体龟裂课题的研究重点。

关键词: 龟裂, 研究方法, 室内试验, 现场试验, 数值模拟, 图像处理

Abstract: Soil desiccation cracking is a common natural phenomenon, which has significant negative impacts on engineering properties of soil, and is the direct cause of many engineering geology and environmental geology problems. It is a key to choose appropriate methods for studying soil desiccation cracking behavior. Based on the research work conducted on soil desiccation cracking behavior in recent years, the applied research methods are reviewed and summarized systematically. Meanwhile, the advantages and disadvantages of each method are compared and analyzed; and then the following understandings are obtained: (1) There are generally two categories of research methods for soil desiccation cracking: experimental study and numerical simulation. The experimental study contains two aspects: laboratory test and field test. At present, the former one is more popular. (2) There are commonly two types of specimens are used for laboratory test: slurry specimen and compacted specimen, and the former one is also more popular. (3) There are two types of equipment are usually applied in soil desiccation cracking test: one is used to control the environmental conditions like environmental chamber; and another is used to monitor the development of desiccation cracking and the geometrical characteristics of crack network, including crack image capture device, laser scanner, CT machine, ERT, distributed optical fiber and so on. (4) During the test, factors (i.e. specimen initial condition, size, thickness, mineral composition, environment temperature, specimen-container contact condition and wetting-drying cycles) affecting crack initiation and propagation are well studied by control variate method. (5) Digital image processing technique is efficient to quantify the geometrical and morphological characteristics, showing more promising as compared with other techniques. (6) The field test can reflect the real law of the formation and development of cracking; however, very few information can be found in literature because such field test is usually time and cost consuming. (7) Numerical simulation is one of the important methods to study soil desiccation cracking behavior. Because at this stage there is no uniform understanding of the mechanism on cracking, the related research on this topic is still in its infancy. Based on the current research, this paper puts forward the research focus of this topic in the future.

Key words: desiccation cracking, research method, laboratory test, field test, numerical modeling, image processing

中图分类号: 

  • TU 433

[1] 张晓磊, 冯世进, 李义成, 王雷, . 路基高架过渡段高铁运行引起的地表 振动现场试验研究[J]. 岩土力学, 2020, 41(S1): 187-194.
[2] 李任融, 孔纲强, 杨庆, 孙广超. 流速对桩−筏基础中能量桩换热效率 与热力耦合特性影响研究[J]. 岩土力学, 2020, 41(S1): 264-270.
[3] 毛浩宇, 徐奴文, 李彪, 樊义林, 吴家耀, 孟国涛, . 基于离散元模拟和微震监测的白鹤滩水电站左岸地下厂房稳定性分析[J]. 岩土力学, 2020, 41(7): 2470-2484.
[4] 史林肯, 周辉, 宋明, 卢景景, 张传庆, 路新景, . 深部复合地层TBM开挖扰动模型试验研究[J]. 岩土力学, 2020, 41(6): 1933-1943.
[5] 张振, 张朝, 叶观宝, 王萌, 肖彦, 程义, . 劲芯水泥土桩承载路堤渐进式失稳破坏机制[J]. 岩土力学, 2020, 41(6): 2122-2131.
[6] 苏杰, 周正华, 李小军, 董青, 李玉萍, 陈柳. 基于偏振特性的下孔法剪切波到时判别问题探讨[J]. 岩土力学, 2020, 41(4): 1420-1428.
[7] 杨高升, 白冰, 姚晓亮, . 高含冰量冻土路基融化固结规律研究[J]. 岩土力学, 2020, 41(3): 1010-1018.
[8] 马秋峰, 秦跃平, 周天白, 杨小彬. 岩石剪切断裂面接触算法的开发与应用[J]. 岩土力学, 2020, 41(3): 1074-1085.
[9] 李康, 王威, 杨典森, 陈卫忠, 亓宪寅, 谭彩. 周期振荡法在低渗透测量中的应用研究[J]. 岩土力学, 2020, 41(3): 1086-1094.
[10] 王培涛, 黄正均, 任奋华, 章亮, 蔡美峰, . 基于3D打印的含复杂节理岩石直剪特性 及破坏机制研究[J]. 岩土力学, 2020, 41(1): 46-56.
[11] 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.
[12] 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.
[13] 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.
[14] 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.
[15] 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.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
No Suggested Reading articles found!