松散堆积体隧道围岩变形破坏细观特征研究

doi:10.16285/j.rsm.2019.0514

岩土力学 ›› 2019, Vol. 40 ›› Issue (12): 4925-4934.doi: 10.16285/j.rsm.2019.0514

松散堆积体隧道围岩变形破坏细观特征研究

谢亦朋¹，杨秀竹¹，阳军生¹，张聪²，戴勇¹，梁雄¹，龚方浩¹

1. 中南大学土木工程学院，湖南长沙 410075；2. 中南林业科技大学土木工程学院，湖南长沙 410004

收稿日期:2018-10-08 出版日期:2019-12-11 发布日期:2020-01-04
通讯作者: 阳军生，男，1969年生，博士，教授，主要从事隧道及地下工程方面的研究。E-mail：jsyang@csu.edu.cn E-mail:xyp66201@126.com
作者简介:谢亦朋，男，1994年生，硕士研究生，主要从事隧道相关方面的研究。
基金资助:
国家自然科学基金（No.51608539）；湖南省自然科学基金（No.2017JJ2316）；中南大学中央高校基本科研业务费专项资金（No. 2019zzts632）。

Mesoscopic characteristics of deformation and failure on surrounding rocks of tunnel through loose deposits

XIE Yi-peng¹, YANG Xiu-zhu¹, YANG Jun-sheng¹, ZHANG Cong², DAI Yong¹, LIANG Xiong¹, GONG Fang-hao¹

1. School of Civil Engineering, Central South University, Changsha, Hunan 410075, China; 2. School of Civil Engineering, Central South University of Forestry and Technology, Changsha, Hunan 410004, China

Received:2018-10-08 Online:2019-12-11 Published:2020-01-04
Supported by:
This work was supported by the National Natural Science Foundation of China(51608539), the Natural Science Foundation of Hunan Province (2017JJ2316) and the Fundamental Research Funds for the Central Universities of Central South University(2019zzts632).

摘要/Abstract

摘要： 隧道穿越复杂松散堆积体地层时，如何确保隧道施工过程的安全是工程人员普遍关心的课题。依托云南省罗打拉隧道，基于Monte Carlo随机原理，结合数字图像处理技术，建立了考虑接触面单元及抗拉强度的堆积体地层隧道开挖细观结构模型，并探讨了隧道开挖引起的堆积体围岩变形、破坏过程以及失稳机制，并在现场进行应用验证。研究结果表明，构建的堆积体地层隧道开挖细观结构模型可有效反映隧道开挖过程中围岩的破坏过程，围岩位移等值线呈波动性与非对称性分布；围岩破坏以剪切破坏为主，局部存在拉裂?剪切复合破坏，且破坏区由边缘块石尖端向深层逐步扩展，形成包裹块石的剪切楔形区及拉剪松动圈，在施工扰动下易发生局部失稳。针对堆积体地层破坏特征，提出了围岩注浆加固措施，地层加固后土石颗粒间胶结良好，开挖轮廓周边形成有效的注浆加固圈，开挖支护过程围岩变形可控，支护结构稳定，效果良好，可为后续类似松散堆积体地层隧道的设计、施工提供新思路。

关键词: 松散堆积体, 隧道, 数字图像技术, 随机模拟, 细观结构, 注浆加固

Abstract: Safety of tunnel construction is a hot topic for the tunnel passing through complex loose deposits. Based on Monte Carlo stochastic principle and digital image processing technology, a mesostructure model for the excavation of Luodala tunnel is established with considering contact surface element and tensile strength. The deformation, failure process and instability mechanism of loose deposits surrounding rock during excavation are discussed and verified by application of the model in practical engineering. The results show that the model can reflect the failure process of surrounding rock during tunnel excavation, and the displacement contour of surrounding rock presents obvious fluctuation and asymmetry. The failure mode of surrounding rock is mainly shear failure, and tension-shear composite failure is also observed in some part. The failure zone extends from tip of the margin rocks to the deep layers, forming wedge-shaped shear zone and tension-shear loose zone, which are prone to cause local instability under construction disturbance. According to the failure characteristics of loose deposits, the grouting reinforcement measures of surrounding rock are proposed. After the reinforcement, the grouting reinforcement ring has been formed around the tunnel with good soil-rock bond and the deformation of surrounding rock can be controlled and the support structure is stable during the excavation and support process. The resutls can provide new ideas for the design and construction of tunnels in similar loose deposits.

Key words: loose deposits, tunnel, digital imaging technology, random simulation, mesostructure, grouting reinforcement

中图分类号:

TU 452

谢亦朋, 杨秀竹, 阳军生, 张聪, 戴勇, 梁雄, 龚方浩, . 松散堆积体隧道围岩变形破坏细观特征研究[J]. 岩土力学, 2019, 40(12): 4925-4934.

XIE Yi-peng, YANG Xiu-zhu, YANG Jun-sheng, ZHANG Cong, DAI Yong, LIANG Xiong, GONG Fang-hao, . Mesoscopic characteristics of deformation and failure on surrounding rocks of tunnel through loose deposits[J]. Rock and Soil Mechanics, 2019, 40(12): 4925-4934.

参考文献

相关文章 15

[1]	徐日庆, 程康, 应宏伟, 林存刚, 梁荣柱, 冯苏阳, . 考虑埋深与剪切效应的基坑卸荷下卧隧道的形变响应[J]. 岩土力学, 2020, 41(S1): 195-207.
[2]	郑刚, 栗晴瀚, 程雪松, 哈达, 赵悦镔. 承压层快速减压与回灌应用于隧道抢险的理论与设计[J]. 岩土力学, 2020, 41(S1): 208-216.
[3]	姚宏波, 李冰河, 童磊, 刘兴旺, 陈卫林. 考虑空间效应的软土隧道上方卸荷变形分析[J]. 岩土力学, 2020, 41(7): 2453-2460.
[4]	房昱纬, 吴振君, 盛谦, 汤华, 梁栋才, . 基于超前钻探测试的隧道地层智能识别方法[J]. 岩土力学, 2020, 41(7): 2494-2503.
[5]	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.
[6]	郑立夫, 高永涛, 周喻, 田书广, . 浅埋隧道冻结法施工地表冻胀融沉规律及冻结壁厚度优化研究[J]. 岩土力学, 2020, 41(6): 2110-2121.
[7]	任洋, 李天斌, 赖林. 强震区隧道洞口段边坡动力响应特征离心振动台试验[J]. 岩土力学, 2020, 41(5): 1605-1612.
[8]	吴鑫林, 张晓平, 刘泉声, 李伟伟, 黄继敏. TBM岩体可掘性预测及其分级研究[J]. 岩土力学, 2020, 41(5): 1721-1729.
[9]	杨峰, 何诗华, 吴遥杰, 计丽艳, 罗静静, 阳军生. 非均质黏土地层隧道开挖面稳定运动单元上限有限元分析[J]. 岩土力学, 2020, 41(4): 1412-1419.
[10]	米博, 项彦勇, . 砂土地层浅埋盾构隧道开挖渗流稳定性的模型试验和计算研究[J]. 岩土力学, 2020, 41(3): 837-848.
[11]	江南, 黄林, 冯君, 张圣亮, 王铎, . 铁路悬索桥隧道式锚碇设计计算方法研究[J]. 岩土力学, 2020, 41(3): 999-1009.
[12]	郑立夫, 高永涛, 周喻, 田书广. 基于流固耦合理论水下隧道冻结壁厚度优化研究[J]. 岩土力学, 2020, 41(3): 1029-1038.
[13]	雷升祥, 赵伟. 软岩隧道大变形环向让压支护机制研究[J]. 岩土力学, 2020, 41(3): 1039-1047.
[14]	杨振兴, 陈健, 孙振川, 游永锋, 周建军, 吕乾乾, . 泥水平衡盾构用海水泥浆的改性试验研究[J]. 岩土力学, 2020, 41(2): 501-508.
[15]	魏纲, 张鑫海, 林心蓓, 华鑫欣, . 基坑开挖引起的旁侧盾构隧道横向受力变化研究[J]. 岩土力学, 2020, 41(2): 635-644.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed

松散堆积体隧道围岩变形破坏细观特征研究

Mesoscopic characteristics of deformation and failure on surrounding rocks of tunnel through loose deposits

PDF (Chinese)

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

Metrics

本文评价

推荐阅读 0