[1]陈 兴,王怀正,宋战平,等.山岭浅埋隧道进洞方案优化与洞口段稳定性分析[J].西安建筑科技大学学报(自然科学版),2023,55(03):359-367.[doi:10.15986/j.1006-7930.2023.03.006 ]
　CHEN Xing,WANG Huaizheng,SONG Zhanping,et al.Optimization of tunnel entry scheme and stability analysis of tunnel entrance section in mountain shallow-buried tunnel[J].J. Xi'an Univ. of Arch. & Tech.(Natural Science Edition),2023,55(03):359-367.[doi:10.15986/j.1006-7930.2023.03.006 ]
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山岭浅埋隧道进洞方案优化与洞口段稳定性分析()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
55
期数:
2023年03期
页码:
359-367
栏目:
出版日期:
2023-06-28

文章信息/Info

Title:
Optimization of tunnel entry scheme and stability analysis of tunnel entrance section in mountain shallow-buried tunnel
文章编号:
1006-7930(2023)03-0359-09
作者:
陈 兴1; 王怀正2; 3; 宋战平2; 3; 曾 涛3; 4; 田小旭2; 3
(1.中交第二公路工程局有限公司,陕西 西安 710119; 2.西安建筑科技大学 隧道与地下结构工程研究所,陕西 西安 710055; 3.西安建筑科技大学 土木工程学院,陕西 西安 710055; 4.陕西省岩土与地下空间工程重点实验室,陕西 西安 710055)
Author(s):
CHEN Xing1;  WANG Huaizheng2; 3;  SONG Zhanping2; 3;  SHI Wenyang3; 4;  TIAN Xiaoxu2; 3
(1.China Communications Second Highway Engineering Bureau Co. Ltd, Xi'an 710119, China; 2.Institute of Tanhel and Undergrourd Structure Engineering of Xi'an Univ. of Arch. & Tech., Xi'an 710055, China; 3.School of Civil Engineering, Xi'an Univ. of Arch.& Tech., Xi'an 710055, China; 4.Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering, Xi'an 710055, China)
关键词:
隧道洞口;  对比分析;  数值模拟;  稳定性
Keywords:
tunnel entrance;  comparative analysis;  numerical simulation;  stability
分类号:
TU 457
DOI:
10.15986/j.1006-7930.2023.03.006
文献标志码:
A
摘要:
若隧道洞口开挖时未采取合理的边坡加固措施,易导致边坡产生开裂、滑坡甚至崩塌等危害.以格鲁吉亚F3标5号公路隧道为背景,探讨了隧道洞口在微型桩墙支护和锚网喷支护两种加固方案下,隧道开挖引起的围岩位移场及应力场变化特征.利用有限元分析软件MIDAS-GTS建立三维模型,模拟隧道施工过程,并结合实际工程监测数据,对比研究了两种支护方案优劣性.结果表明:锚网喷支护方案围岩最大横纵向位移分别为3.55 mm和8.73 mm,最大拉应力为1.91 MPa; 衬砌沿隧道开挖方向的最大弯矩为33.71 kN·m,最大横向位移为3.55 mm.锚网喷支护方案较微型桩墙支护方案更为有效,显著提高了洞口边坡稳定性.因此,锚网喷支护方案在该地形中更具合理性.其结论对山岭地区公路隧道的建设提供一定的指导作用.
Abstract:
Unreasonable slope reinforcement measures during excavation of tunnel portals can easily lead to the damage of slope cracking, landslide or even collapse. In this paper, taking the No.5 highway tunnel in the F3 bid of Georgia as an example, the displacement and stress field changes of surrounding rock caused by tunnel excavation are discussed under the two reinforcement measures of micro pile-wall support and bolt-mesh-spurting supporting. The finite element analysis software MIDAS-GTS is used to establish a three-dimensional model to simulate the tunnel construction process, and combined with the actual project monitoring data, the advantages and disadvantages of the two support schemes are compared. The results show that the maximum transverse and longitudinal displacements of the surrounding rock are 3.55 mm and 8.73 mm respectively, and the maximum tensile stress is 1.91 MPa. The maximum bending moment of lining along the tunnel excavation direction is 33.71 kN·m, and the maximum transverse displacement is 3.55 mm. The anchor net spray support scheme is more effective than the micro pile wall support scheme, which significantly improves the stability of the portal slope. Therefore, the anchor net spray support scheme is more reasonable in this terrain. The conclusion can provide some guidance for the construction of highway tunnels in mountainous areas.

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备注/Memo

备注/Memo:
收稿日期:2021-08-24修回日期:2023-01-18
基金项目:陕西省创新能力支撑计划-创新团队基金资助(2020TD-005); 陕西省自然科学基金资助(2021JM-373)
第一作者:陈 兴(1974—),男,高级工程师,主要从事土木工程施工技术管理工作.E-mail:437086155@qq.com
通信作者:王怀正(1997—),男,硕士研究生,主要研究隧道施工技术.E-mail:wanghzzy@163.com
更新日期/Last Update: 2023-06-28