|本期目录/Table of Contents|

[1]张成良,张金瑞,蔡林真,等.软岩大断面隧道二次衬砌支护时机的选择研究[J].中国安全生产科学技术,2018,14(9):116-121.[doi:10.11731/j.issn.1673-193x.2018.09.019]
　ZHANG Chengliang,ZHANG Jinrui,CAI Linzhen,et al.Research on timing selection of secondary lining support for large crosssection tunnel in soft rock[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2018,14(9):116-121.[doi:10.11731/j.issn.1673-193x.2018.09.019]
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软岩大断面隧道二次衬砌支护时机的选择研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
14
期数:
2018年9期
页码:
116-121
栏目:
职业安全卫生管理与技术
出版日期:
2018-09-30

文章信息/Info

Title:
Research on timing selection of secondary lining support for large crosssection tunnel in soft rock
文章编号:
1673-193X(2018)-09-0116-06
作者:
张成良; 张金瑞; 蔡林真; 吕文乾
（昆明理工大学 国土资源工程学院，云南 昆明 650093）
Author(s):
ZHANG Chengliang;  ZHANG Jinrui;  CAI Linzhen;  LYU Wenqian
(Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming Yunnan 650093, China)
关键词:
公路隧道; 监控量测; 二次支护; 蠕变本构模型
Keywords:
highway tunnel;  monitoring measurement;  secondary support;  creep constitutive model
分类号:
X947；U455.91
DOI:
10.11731/j.issn.1673-193x.2018.09.019
文献标志码:
A
摘要:
为探明软岩大断面隧道开挖后围岩的变形与支护时机的相关关系，利用监控测量数据反演分析中获得的蠕变参数，校正ABAQUS的D-P蠕变模型；在此基础上建立数值计算模型，对具有代表性的围岩进口浅埋段、出口浅埋段和洞身段进行了相关的数值分析，研究软岩大断面隧道岩体的变形规律和支护时机之间的关系；通过埋设现场监控量测点对二衬支护时机的结果进行了验证。研究结果表明：出口和进口浅埋段的V级围岩，开挖后岩体的变形速率大、时间短，选择以最终位移量的80%为最佳支护时机，二衬的最佳支护时机为隧道开挖支护后的15 d左右；洞身段IV级围岩具有变形速率小、时间长，以最终位移量的90%为最佳支护时机，洞身段二衬的最佳支护时机为隧道开挖支护后的30 d左右。现场验证表明，选择的二次衬砌支护的时机是可行的。
Abstract:
In order to explore the relationship between the deformation and support timing of surrounding rock after the excavation of large crosssection tunnel in soft rock, the creep parameters obtained from the inversion of the monitoring measurement data were analyzed to correct the D-P creep model of ABAQUS. On this basis, a numerical calculation mode was established, and the relevant numerical analysis were carried out in the shallow buried section at the entrance, the shallow buried section at the exit and the tunnel body section of the representative surrounding rock, and the relationship between the deformation laws and support timing of rock mass for the large crosssection tunnel in soft rock was studied. The results of secondary lining support timing were verified through laying the field monitoring measurement points. The results showed that for the Vclass surrounding rock in the shallow buried section at the entrance and exit, the rock mass after the excavation had high deformation rate and short time, and the optimum support timing was selected to be 80% of the final displacement, while the optimum support timing of secondary lining was about 15 days after the tunnel excavation and support. The IVclass surrounding rock in the tunnel body section had low deformation rate and long time, and the optimum support timing was selected to be 90% of the final displacement, while the optimum support timing of secondary lining was about 30 days after the tunnel excavation and support. The field verification showed that the selected timing of secondary lining support was feasible.

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备注/Memo

备注/Memo:
收稿日期： 2018-06-13
基金项目： 国家自然科学基金项目（11862010）
作者简介： 张成良，博士，副教授，主要研究方向为岩土和爆破工程。
通信作者： 张金瑞，硕士研究生，主要研究方向为岩土工程。
更新日期/Last Update: 2018-10-09