基于黄土结构损伤的地裂缝局部化破裂发展机制

doi:10.7522/j.issn.1000-0240.2016.0134

冰川冻土 ›› 2016, Vol. 38 ›› Issue (4): 1150-1156.doi: 10.7522/j.issn.1000-0240.2016.0134

基于黄土结构损伤的地裂缝局部化破裂发展机制

佘芳涛^{1 2}, 马纯阳¹, 张俊岱³

1. 西安理工大学, 陕西西安 710048;
2. 陕西省黄土力学与工程重点实验室, 陕西西安 710048;
3. 中铁隧道勘测设计院有限公司, 天津 300133

收稿日期:2016-02-03 修回日期:2016-07-20 出版日期:2016-08-25 发布日期:2016-09-19
作者简介:佘芳涛(1983-),男,安徽安庆人,讲师,2012年在西安理工大学获博士学位,现从事黄土力学与工程研究.E-mail:shefangtao@xaut.edu.cn
基金资助:
陕西省科技厅基金项目（2014JQ5173）；陕西省教育厅基金项目（14JK1519）资助

Localized failure mechanism of ground fracture based on structural damage of loess

SHE Fangtao^{1 2}, MA Chunyang¹, ZHANG Jundai³

1. Xi'an University of Technology, Xi'an 710048, China;
2. Shaanxi Provincial Key Laboratory of Loess Mechanics and Engineering, Xi'an 710048, China;
3. China Railway Tunnel Survey & Design Institute Co. Ltd., Tianjin 300133, China

Received:2016-02-03 Revised:2016-07-20 Online:2016-08-25 Published:2016-09-19

摘要/Abstract

摘要： 针对西安地裂缝活动条件下黄土覆盖层裂缝的发展与形成，依据黄土的构度和应力比结构性参数变化规律，分析了黄土构度和抗拉强度之间的关系，建立了黄土结构性演变的数学模型，抗拉强度与抗剪强度随结构性参数变化强度准则，以及反映黄土结构性演变的Mohr-Coulomb屈服面弹塑性模型.通过本构模型嵌入FLAC3D软件，数值模拟西安地裂缝活动边界条件，以及结构性黄土地层结构，进行了黄土结构损伤变化和地层破裂带形成发展分析研究.表明地裂缝错动位移作用条件下，黄土地层塑形区域破裂带发展分为初始剪切破坏、初始拉伸破坏、剪切与拉伸破坏发展、破裂带贯通四个阶段；地层破裂带黄土的结构性损伤衰减变化突出，黄土应力比结构性参数等值线与地层塑性破裂带分布一致.揭示的黄土地层局部化破裂发展过程机制，对于认识地裂缝造成地面建筑物与地下工程灾害有重要的理论和实际意义.

关键词: 黄土, 结构损伤, 结构性参数, 地裂缝, 破裂带

Abstract: Stuctural damage and fracture of loess strata is caused by the activity of ground fracture. First, bsaed on structural index and stress ratio structural parameter, we establish mathematical model reflecting the initial structure of loess and evolution under coupling of stress and moisture, and analyse variation of tensile strength and compression-shear strength of loess with structure. Second, we establish M-C structure constitutive model of hyper elasto-plasticity which reflects structure evolution of loess. Third, the constitutive model is compiled by Fish language to accomplish inserting FLAC3D explicit finite-difference software. Finally, Stuctural damage and fracture of loess strata under acting ground fracture is very well simulated by the software, and we research on localized failure mechanism of ground fracture of loess strata. Research shows that the evolutionary process of ground fracture in loess zone divided into four stages: initial shear damage stage, initial tensile damage stage, tensile and shear failure development stage, failure surface through stage. Structural evolution of loess is very predominant in the process of progressive failure. The distribution of stress ratio structural parameter under acting ground fracture is consistent with the plastic zones. The results of the research have great significance both in theory sense and engineering practice to understanding the disasters of ground and underground buildings under acting ground fracture.

Key words: loess, structural damage, structural parameter, ground fracture, rupture zones

中图分类号:

P694

佘芳涛, 马纯阳, 张俊岱. 基于黄土结构损伤的地裂缝局部化破裂发展机制[J]. 冰川冻土, 2016, 38(4): 1150-1156.

SHE Fangtao, MA Chunyang, ZHANG Jundai. Localized failure mechanism of ground fracture based on structural damage of loess[J]. JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY, 2016, 38(4): 1150-1156.

参考文献

[1] Shao Shengjun, She Fangtao, Zheng Wankun. Analysis on interaction mechanism between tunnel structure and surrounding soil under action of vertical ground-fissure[J]. Journal of Shanghai Jiaotong University, 2011, 45(5): 634-638. [邵生俊, 佘芳涛, 郑万坤. 地裂缝隧道衬砌结构与围岩相互作用机理[J]. 上海交通大学学报, 2011, 45(5): 634-638.]
[2] Fang Lili, Qi Jilin, Ma Wei. Freeze-thaw induced changes in soil structure and its relationship with variations in strength[J]. Journal of Glaciology and Geocryology, 2012, 34(2): 435-440. [方丽莉, 齐吉琳, 马巍. 冻融作用对土结构性的影响及其导致的强度变化[J]. 冰川冻土, 2012, 34(2): 435-440.]
[3] Pang Guoliang. A discussion on crevasse in frozen earth[J]. Journal of Glaciology and Geocryology, 1986, 8(3): 287-290. [庞国良. 关于冻土裂缝的探讨[J]. 冰川冻土, 1986, 8(3): 287-290.]
[4] Chou Yaling, Jiang Xiangang, He Binbin, et al. Experimental study of forzen loess mechanical behaviour based on constitutive property[J]. Journal of Glaciology and Geocryology, 2014, 36(4): 913-921. [丑亚玲, 蒋先刚, 何彬彬, 等. 基于结构性的冻结黄土力学特性试验研究[J]. 冰川冻土, 2014, 36(4): 913-921.]
[5] Huang Qiangbing, Peng Jianbing. Model test study on effect of ground fissure on open-cut metro tunnel with integral lining[J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(11): 2324-2331. [黄强兵, 彭建兵. 地裂缝对地铁明挖整体式衬砌隧道影响机制的模型试验研究[J]. 岩石力学与工程学报, 2008, 27(11): 2324-2331.]
[6] Xie Dingyi, Qi Jilin. Soil structure characteristics and new approach in research on its quantitative parameter[J]. Chinese Journal of Rock Mechanics and Engineering, 1999, 21(6): 651-656. [谢定义, 齐吉琳. 土结构性及其定量化参数研究的新途径[J]. 岩土工程学报, 1999, 21(6): 651-656.]
[7] She Fangtao, Shao Shengjun, Fan Wen. Initial structure of loess and its evolution under the condition of stress and moisture[J]. Rock and Soil Mechanics, 2013, 34(10): 2796-2800. [佘芳涛, 邵生俊, 范文. 黄土初始结构性及其湿载作用下演化规律[J]. 岩土力学, 2013, 34(10): 2796-2800.]
[8] Zheng Wen. Studies on the stability analysis techniques of thestructural loess slope based on its tensile characteristic[D]. Xi'an: Xi'an University of Technology, 2012. [郑文. 考虑抗拉特性的结构性黄土边坡稳定性分析方法研究[D]. 西安: 西安理工大学, 2012.]

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基于黄土结构损伤的地裂缝局部化破裂发展机制

Localized failure mechanism of ground fracture based on structural damage of loess

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