龙门山超长公路隧道横断面布置方案

doi:10.3973/j.issn.2096-4498.2025.10.012

隧道建设（中英文） ›› 2025, Vol. 45 ›› Issue (10): 1935-1946.DOI: 10.3973/j.issn.2096-4498.2025.10.012

龙门山超长公路隧道横断面布置方案

唐协^{1, 2}，林国进^{1, 2}，李玉文¹，何佳^1，*，张航¹

（1. 四川省公路规划勘察设计研究院有限公司，四川成都 610041； 2. 西南交通大学土木工程学院，四川成都 610031）

出版日期:2025-10-20 发布日期:2025-10-20
作者简介:唐协（1982—），男，湖南永州人，2007年毕业于西南交通大学，桥梁与隧道工程专业，博士，正高级工程师，现从事公路勘察设计研究工作。E-mail： 22282206@qq.com。 *通信作者：何佳， E-mail： 267020195@qq.com。

Cross-Sectional Layout Schemes for Longmenshan Ultra-Long Highway Tunnel

TANG Xie^{1, 2}, LIN Guojin^{1, 2}, LI Yuwen¹, HE Jia^{1, *}, ZHANG Hang¹

(1. Sichuan Highway Planning, Survey, Design and Research Institute Ltd., Chengdu 610041, Sichuan, China; 2. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China)

Online:2025-10-20 Published:2025-10-20

摘要/Abstract

摘要： 为确保长约24 km和埋深近2 500 m的龙门山隧道安全、高效运行，基于隧道运营安全功能需求和隧道建造能力，提出两钻爆法主洞+中间TBM平导三洞布置方案和钻爆法主洞+TBM主洞两洞布置方案。在此基础上，对超长隧道内运营限制速度、设计速度、建筑限界、内轮廓尺寸等进行理论计算分析。主要结论如下： 1)基于洞内外亮度差异和驾驶行为特征，洞内进行分段运营限速，隧道洞口至第1处停车带段按80 km/h运营限速，洞身段按100 km/h运营限速；在造价增加有限的情况下，全隧道采用100 km/h设计速度。2)隧道洞身段采用左侧由75 cm加宽至150 cm供消防摩托车通行的建筑限界，洞口段采用100 km/h设计速度不加宽的建筑限界，结合洞口段最大超高±4%、抗震设防措施等级为四级等加大内轮廓的需求，全隧道采用1个内轮廓，仅在自洞口第1处停车带后水平偏移27 cm即可。3)中间平导TBM方案，在平导顶部设置专用排烟道，中下部作为人员和车辆专用疏散通道，护盾式TBM直径为9.2 m；单主洞TBM方案，在TBM洞顶部设置专用排烟道，下部设置人员和小型车辆专用疏散通道，护盾式TBM直径为13.3 m。经综合比较，推荐疏散救援更优、岩爆卡机脱困更易处理的中间平导TBM方案。

关键词: 龙门山超长公路隧道, 横断面布置, TBM, 建筑限界, 侧向加宽

Abstract: To ensure the safe and efficient operation of the Longmenshan tunnel with a length of approximately 24 km and a buried depth of nearly 2 500 m, two cross-sectional layout schemes, two drill-and-blast main tunnels + middle TBM parallel guide tunnel, and drill-and-blast main tunnel + TBM main tunnel are proposed considering the requirements of tunnel operation safety and tunnel construction capabilities. Subsequently, theoretical calculations and analysis are conducted on the operating speed limit, design speed, building clearance, and inner contour dimensions in ultra-long tunnels. The following conclusions are drawn. (1) Based on the difference in brightness inside and outside the tunnel and driving behavior characteristics, the tunnel is divided into sections with different speed limits. The section from tunnel entrance to the first parking zone has a speed limit of 80 km/h, and the tunnel section—100 km/h. With a limited cost increase, the entire tunnel can be operated at a speed limit of 100 km/h. (2) The tunnel body section adopts a building limit widened from 75 to 150 cm on the left side for the passage of firefighting motorcycles, whereas the entrance section adopts a building limit without widening, with a designed speed of 100 km/h. Considering the need to increase the inner contour of the entrance section by ±4% of the maximum height and seismic fortification level 4, one inner contour is adopted for the entire tunnel, which can be horizontally offset by only 27 cm from the first parking strip at the entrance. (3) The TBM middle parallel guide tunnel is equipped with a dedicated smoke exhaust duct at the top, and its middle and lower parts are used as evacuation passages for personnel and vehicles, with a shielded TBM diameter of 9.2 m. The TBM main tunnel is equipped with a dedicated smoke exhaust duct at the top and a dedicated evacuation passage for personnel and small vehicles at the bottom, with a shielded TBM diameter of 13.3 m. The middle parallel guide scheme of TBM tunnels is recommended for better evacuation and rescue, as well as easier handling of the release of rockburst-induced TBM jamming.

Key words: Longmenshan ultra-long highway tunnel, cross-section layout, TBM, construction clearance, lateral widening

唐协, 林国进, 李玉文, 何佳, 张航. 龙门山超长公路隧道横断面布置方案[J]. 隧道建设, 2025, 45(10): 1935-1946.

TANG Xie, LIN Guojin, LI Yuwen, HE Jia, ZHANG Hang. Cross-Sectional Layout Schemes for Longmenshan Ultra-Long Highway Tunnel[J]. Tunnel Construction, 2025, 45(10): 1935-1946.

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龙门山超长公路隧道横断面布置方案

Cross-Sectional Layout Schemes for Longmenshan Ultra-Long Highway Tunnel

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