[1]张万志,徐帮树,曾仲毅,等.降雨入渗下膨胀性黄土隧道围岩破坏演化[J].东南大学学报(自然科学版),2018,48(4):736-744.[doi:10.3969/j.issn.1001-0505.2018.04.021]
 Zhang Wanzhi,Xu Bangshu,Zeng Zhongyi,et al.Research on failure evolution process of surrounding rock of swelling loess tunnel under rainfall infiltration[J].Journal of Southeast University (Natural Science Edition),2018,48(4):736-744.[doi:10.3969/j.issn.1001-0505.2018.04.021]
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降雨入渗下膨胀性黄土隧道围岩破坏演化()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
48
期数:
2018年第4期
页码:
736-744
栏目:
交通运输工程
出版日期:
2018-07-20

文章信息/Info

Title:
Research on failure evolution process of surrounding rock of swelling loess tunnel under rainfall infiltration
作者:
张万志1徐帮树1曾仲毅2田斌华1石伟航1
1山东大学岩土与结构工程研究中心, 济南 250061; 2贵州省交通规划勘察设计研究院股份有限公司, 贵阳 550081
Author(s):
Zhang Wanzhi1 Xu Bangshu1 Zeng Zhongyi2 Tian Binhua1 Shi Weihang1
1Geotechnical and Structural Engineering Research Center, Shandong University, Jinan 250061, China
2Guizhou Transportation Planning Survey & Design Academe Co., Ltd., Guiyang 550081, China
关键词:
膨胀性黄土 隧道围岩 降雨入渗 围岩破坏 数值模拟
Keywords:
swelling loess tunnel surrounding rock rainfall infiltration surrounding rock failure numerical simulation
分类号:
U451.2
DOI:
10.3969/j.issn.1001-0505.2018.04.021
摘要:
应用FISH语言改进FLAC3D软件的非饱和渗流计算功能,同时等效模拟渗流过程中土体强度折减和膨胀力增加的力学特性,提出降雨入渗下膨胀性黄土隧道围岩大变形破坏数值演化分析方法.依托某膨胀性黄土隧道工程实例,将隧道围岩变形及力学特性现场测试与计算结果比较,验证了该数值方法的适用性.结果表明:降雨持续作用下隧道围岩位移随含水率呈台阶形增长,分析得出了位移出现极大值时对应的含水率,在膨胀土隧道工程实践中可以此作为安全施工的一项监控指标;降雨持续作用60 h,隧道边墙正弯矩明显增大,初期支护向内挤出变形严重,围岩体剪切应变发育显著,且地表山体边坡发育出大面积塑性贯通区,数值分析有效揭示了隧道洞内塌方及地表山坡滑塌破坏机理.研究成果可对膨胀性黄土隧道围岩稳定性分析和变形控制提供一定的指导.
Abstract:
Routines for improving the capability of unsaturated seepage calculation of FLAC3D software were programmed by using FISH language. The mechanical properties of shear strength reduction and swelling force increase of surrounding rock in unsaturated seepage calculation were also considered. A numerical evolution analysis method for the large deformation and failure of the surrounding rock of the expanded loess tunnel was proposed. Based on a swelling loess tunnel project, the applicability of the numerical simulation was verified by comparing with the measurement results of tunnel surrounding rock deformation and mechanical characteristics. The results indicate that, due to the effect of continuous rainfall, the displacement of tunnel surrounding rock increases step by step with the increase of water content. The water content corresponding to the maximum value of displacement is obtained, which can be used as a monitoring index for the safe construction of the swelling loess tunnel engineering. After the rain lasts for 60 h, the positive bending moment of the tunnel side wall increases obviously, the deformation of the initial supporting is inwardly extruded, the shear strain increment develops remarkably, and a large area of plastic transfixion zone is developed along the mountain slope. The mechanism of tunnel collapse and slope slumping is revealed. The research results can provide a guide for the stability analysis and deformation control of tunnel surrounding rock in expansive soil.

参考文献/References:

[1] 陈正汉, 方祥位, 朱元青, 等. 膨胀土和黄土的细观结构及其演化规律研究[J]. 岩土力学, 2009,30(1): 1-11. DOI:10.3969/j.issn.1000-7598.2009.01.001.
Chen Zhenghan, Fang Xiangwei, Zhu Yuanqing, et al. Research on meso-structures and their evolution laws of expansive soil and loess [J]. Rock and Soil Mechanics, 2009, 30(1): 1-11. DOI:10.3969/j.issn.1000-7598.2009.01.001. (in Chinese)
[2] Rao S M, Reddy B V V, Muttharam M. The impact of cyclic wetting and drying on the swelling behaviour of stabilized expansive soils[J]. Engineering Geology, 2001, 60(1): 223-233. DOI:10.1016/s0013-7952(00)00103-4.
[3] 曾仲毅. 降雨入渗下膨胀性黄土隧道围岩力学特性及稳定性分析[D].济南:山东大学土建与水利学院, 2014.
[4] 曾铃, 史振宁, 付宏渊, 等. 降雨入渗对边坡暂态饱和区分布特征的影响[J].中国公路学报, 2017,30(1): 25-34.
  Zeng Ling, Shi Zhenning, Fu Hongyuan, et al. Influence of rainfall infiltration on distribution characteristics of slope transient saturated zone [J]. China Journal of Highway and Transport, 2017, 30(1): 25-34.(in Chinese)
[5] 李树忱, 晏勤, 谢璨, 等. 膨胀性黄土隧道钢拱架–格栅联合支护力学特性研究[J]. 岩石力学与工程学报, 2017, 36(2): 446-456.DOI:10.13722/j.cnki.jrme.2016.0599.
Li Shuchen, Yan Qin, Xie Can, et al. The mechanical behavior of composite supports of steel-grid in loess tunnel [J]. Chinese Journal of Rock Mechanics and Engineering, 2017, 36(2): 446-456. DOI:10.13722/j.cnki.jrme.2016.0599. (in Chinese)
[6] 王军, 曹平, 李江腾, 等. 降雨入渗对流变介质隧道边坡稳定性的分析[J]. 岩土力学, 2009, 30(7): 2158-2162, 2167.DOI:10.3969/j.issn.1000-7598.2009.07.050.
Wang Jun, Cao Ping, Li Jiangteng, et al. Analysis of stability of tunnel-slope with rheological medium under rainfall infiltration [J]. Rock and Soil Mechanics, 2009, 30(7): 2158-2162, 2167. DOI:10.3969/j.issn.1000-7598.2009.07.050. (in Chinese)
[7] 陈伟, 阮怀宁, 张辉. 降雨入渗对浅埋偏压隧道及其支护系统的影响[J].现代隧道技术, 2008, 45(1): 30-34, 38.DOI:10.3969/j.issn.1009-6582.2008.01.006.
Chen Wei, Ruan Huaining, Zhang Hui. Influence of rainfall seepage on the behavior of an evenly-pressured shallow tunnel and its support system [J]. Modern Tunnelling Technology, 2008, 45(1): 30-34, 38. DOI:10.3969/j.issn.1009-6582.2008.01.006. (in Chinese)
[8] 冯丙阳. 膨胀性黄土隧道大变形演化特征及支护对策研究[D]. 济南:山东大学土建与水利学院, 2014.
[9] 毛昶熙. 渗流计算分析与控制[M]. 北京: 中国水利水电出版社, 2003:7-18.
[10] 廖红建, 王铁行. 岩土工程数值分析[M].北京:机械工业出版社, 2006:225-230.
[11] Fredlund D G, Xing A Q. Equations for the soil-water characteristic curve[J]. Canadian Geotechnical Journal, 1994, 31(4): 521-532. DOI:10.1139/t94-061.
[12] Nguyen H V, Durso D F. Absorption of water by fiber webs: An illustration of diffusion transport [J]. Proceed Technical Assoc of the Pulp & Paper Industry, 1983, 66(12): 76-79.
[13] 贾文聪, 李永红, 党进谦, 等. 膨胀土强度特性的试验研究[J]. 西北农林科技大学学报(自然科学版),2015(5): 217-221,228. DOI:10.13207/j.cnki.jnwafu.2015.05.016.
Jia Wencong, Li Yonghong, Dang Jinqian, et al. Strength characteristics of expansive soil [J]. Journal of Northwest A& F University(Natural Science Edition), 2015(5): 217-221, 228.DOI:10.13207/j.cnki.jnwafu.2015.05.016. (in Chinese)
[14] 丁振洲, 郑颖人, 李利晟. 膨胀力变化规律试验研究[J]. 岩土力学, 2007, 28(7): 1328-1332.DOI:10.3969/j.issn.1000-7598.2007.07.008.
Ding Zhenzhou, Zheng Yingren, Li Lisheng. Trial study on variation regularity of swelling force [J]. Rock and Soil Mechanics, 2007, 28(7): 1328-1332. DOI:10.3969/j.issn.1000-7598.2007.07.008. (in Chinese)
[15] 白福青, 刘斯宏, 袁骄. 滤纸法测定南阳中膨胀土土水特征曲线试验研究[J]. 岩土工程学报, 2011, 33(6):928-933.
  Bai Fuqing, Liu Sihong, Yuan Jiao. Measurement of SWCC of Nanyang expansive soil using the filter paper method [J]. Chinese Journal of Geotechnical Engineering, 2011, 33(6): 928-933.(in Chinese)
[16] 曾仲毅, 徐帮树, 胡世权, 等. 增湿条件下膨胀土隧道衬砌破坏数值分析[J]. 岩土力学, 2014, 35(3): 871-880.
  Zeng Zhongyi, Xu Bangshu, Hu Shiquan, et al. Numerical analysis of tunnel liner failure mechanism in expansive soil considering water-increased state [J]. Rock and Soil Mechanics, 2014,35(3): 871-880.(in Chinese)

备注/Memo

备注/Memo:
收稿日期: 2017-12-04.
作者简介: 张万志(1988—),男,博士生;徐帮树(联系人),男,博士,副教授,xubangshu@sdu.edu.cn.
基金项目: 国家自然科学基金青年科学基金资助项目(50909056)、山东省自然科学基金资助项目(ZR2014EEM014).
引用本文: 张万志,徐帮树,曾仲毅,等.降雨入渗下膨胀性黄土隧道围岩破坏演化[J].东南大学学报(自然科学版),2018,48(4):736-744. DOI:10.3969/j.issn.1001-0505.2018.04.021.
更新日期/Last Update: 2018-07-20