Abstract：In order to investigate the asymmetric deformation characteristics and structural damage patterns in tunnel intersections，and to propose the reasonable type and suitable support system for the intersection under the extrusion deformation，the Yulong Snow Mountain Tunnel of Lijiang—Shangri—La Railway is selected as the engineering background in this paper，and based on the field monitoring，the investigation on the structural deformation and biased-pressure characteristics of the intersections sections is performed. On this foundation，the influence range of the intersection is analyzed through numerical simulation to investigate the influence of reasonable intersection type on the tunnel support effect. According to the results of the study，the intersection support structure，under the action of extruded surrounding rock，shows significant asymmetric deformation and biased-pressure characteristics. The support damage mostly occurs at the arch shoulder and arch waist. When a parallel guide tunnel intersects the main tunnel at 45°and is subsequently further excavated，stress concentration is observed on both the acute and obtuse sides of the main tunnel?s support，with the acute side experiencing higher stress levels and less deformation，indicating a severe structural biased pressure. The direction of structural biased pressure on the acute side of the main tunnel is related to the distance from the intersection，with a reversal in biased-pressure direction occurring between distances of 0.98D and 1.26D. Compared to 45°skewed intersections，h-shaped intersections prove more effective in distributing the main tunnel?s axial stress，circumferential stress，and deformation.
胡 辉，田浩晟，杨文波，董沐野，周 扬，尤著刚. 高地应力挤压性围岩隧道交叉段变形及结构力学特性研究[J]. 岩石力学与工程学报, 2024, 43(8): 1952-1965.
HU Hui，TIAN Haosheng，YANG Wenbo，DONG Muye，ZHOU Yang，YOU Zhugang. Study on deformation and structural mechanics characteristics of intersection sections in high stress ground squeezing surrounding rock tunnels. , 2024, 43(8): 1952-1965.
[1] 李国良，李 宁. 挤压性围岩隧道若干基本问题探讨[J]. 现代隧道技术，2018，55(1)：1–6.(LI Guoliang，LI Ning. Discussion of tunnelling in squeezed surrounding rock[J]. Modern Tunnelling Technology，2018，55(1)：1–6.(in Chinese))
[2] 白雅伟，李梦瑶，邵 帅，等. 深埋公路隧道复杂断面十字交叉施工稳定性数值分析[J]. 水利与建筑工程学报，2020，18(6)：128–134.(BAI Yawei，LI Mengyao，SHAO Shuai，et al. Numerical analysis of the stability of deep-buried highway tunnels with complex cross sections[J]. Journal of Water Resources and Architectural Engineering，2020，18(6)：128–134.(in Chinese))
[3] 杜广印，武 军，夏 涵，等. 黄土十字交叉隧道开挖下支护结构变形特性研究[J]. 工程地质学报，2022，30(2)：475–483.(DU Guangyin，WU Jun，XIA Han，et al. Study on deformation characteristics of supporting structure under loess criss-cross tunnel excavation[J]. Journal of Engineering Geology，2022，30(2)：475–483.(in Chinese))
[4] TERZAGHI K. Rock defects and loads in tunnel supports[C]// Rock Tunneling With Steel Supports. Youngstown，Ohio：The Commercial Shearing and Stamping Co.，2004：17–99.
[5] BARLA G. Squeezing rocks in tunnels[J]. International Society for Rock Mechanics News Journal，1995，2(3/4)：44–49.
[6] 王成虎，沙 鹏，胡元芳，等. 隧道围岩挤压变形问题探究[J]. 岩土力学，2011，32(增2)：143–147.(WANG Chenghu，SHA Peng，HU Yuanfang，et al. Study of squeezing deformation problems during tunneling[J]. Rock and Soil Mechanics，2011，32(Supp.2)：143–147.(in Chinese))
[7] 李 磊，谭忠盛. 挤压性破碎软岩隧道大变形特征及机制研究[J]. 岩石力学与工程学报，2018，37(增1)：3 593–3 603.(LI Lei，TAN Zhongsheng. Characteristic and mechanism research for large deformation problem in squeezing-shattered soft rock tunnel[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(Supp.1)：3 593–3 603.(in Chinese))
[8] 何满潮，袁 越，王晓雷，等. 新疆中生代复合型软岩大变形控制技术及其应用[J]. 岩石力学与工程学报，2013，32(3)：433–441. (HE Manchao，YUAN Yue，WANG Xiaolei，et al. Control technology for large deformation of mesozoic compound soft rock in Xinjiang and its application[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(3)：433–441.(in Chinese))
[9] 李术才，徐 飞，李利平，等. 隧道工程大变形研究现状、问题与对策及新型支护体系应用介绍[J]. 岩石力学与工程学报，2016，35(7)：1 366–1 376.(LI Shucai，XU Fei，LI Liping，et al. State of the art：challenge and methods on large deformation in tunnel engineering and introduction of a new type supporting system[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(7)：1 366–1 376.(in Chinese))
[10] 胡春停，刘艳仓. 三联隧道软弱围岩条件下横洞与正洞交岔段施工技术[J]. 隧道建设，2012，32(2)：218–222.(HU Chunting，LIU Yancang. Construction technology for junction section between horizontal adit and main tunnel in soft ground：Case study on Sanlian tunnel[J]. Tunnel Construction，2012，32(2)：218–222.(in Chinese))
[11] 宋金贵. 横洞进正洞交叉口设计优化方案研究[J]. 隧道建设，2017，37(增1)：168–173.(SONG Jingui. Study of optimization scheme of design of connection section between horizontal gallery and main tunnel[J]. Tunnel Construction，2017，37(Supp.1)：168–173.(in Chinese))
[12] 钱玉佳，乔海洋，江志鹏，等. 隧道横洞进双线正洞交叉口导洞法施工研究[J]. 建筑结构，2021，51(增1)：2 340–2 345.(QIAN Yujia，QIAO Haiyang，JIANG Zhipeng，et al. Research on the construction of roof raising at cross tunnel into double main tunnel intersection[J]. Building Structure，2021，51(Supp.1)：2 340–2 345.(in Chinese))
[13] 彭 波. 大跨隧道交叉口开挖方法及力学行为研究[硕士学位论文][D]. 重庆：重庆交通大学，2013.(PENG Bo. Research on excavation method and mechanical behavior of large span tunnel intersection[M. S. Thesis][D]. Chongqing：Chongqing Jiaotong University，2013.(in Chinese))
[14] 王 玥，史继尧. 大断面黄土隧道三岔口区域前期变形分析及开挖优化[J]. 隧道建设，2015，35(1)：83–88.(WANG Yue，SHI Jiyao. Early deformation analysis and excavation optimization of junction sections of large cross-section loess tunnels[J]. Tunnel Construction，2015，35(1)：83–88.(in Chinese))
[15] 游步上，陈尧中. 隧道交叉段变形机制之探讨[J]. 隧道建设，2007，27(增2)：109–113.(YOU Bushang，CHEN Yaozhong. The deformation mechanism of tunnel intersection[J]. Tunnel Construction，2007，27(Supp.2)：109–113.(in Chinese))
[16] HSIAO F Y，WANG C，CHERN J. Numerical simulation of rock deformation for support design in tunnel intersection area[J]. Tunnelling and Underground Space Technology，2009，24(1)：14–21.
[17] 梁桥欣. 特长公路隧道空间交叉结构及地下洞群施工力学特征研究[硕士学位论文][D]. 成都：西南交通大学，2013.(LIANG Qiaoxin. Study on the construction mechanics characteristics of space cross structure and underground tunnel group of long highway tunnels[M. S. Thesis][D]. Chengdu：Southwest Jiaotong University，2013.(in Chinese))
[18] 张宪鑫. 深埋交叉隧道开挖变形行为及衬砌应力研究[硕士学位论文][D]. 重庆：重庆大学，2007.(ZHANG Xianxin. Study on deformation behavior and lining stress of deep buried cross tunnel excavation[M. S. Thesis][D]. Chongqing：Chongqing University，2007.(in Chinese))
[19] 靳晓光，李晓红. 深埋交叉隧道动态施工力学行为研究[J]. 重庆建筑大学学报，2008，30(2)：32–36.(JIN Xiaoguang，LI Xiaohong. Dynamic construction mechanical behavior of a deeply-buried intersection tunnel[J]. Journal of Chongqing Jianzhu University，2008，30(2)：32–36.(in Chinese))
[20] 赵 文，王 鑫，柏 谦. 原位扩建既有隧道竖井与主洞交叉段施工力学[J]. 东北大学学报：自然科学版，2021，42(5)：713–719. (ZHAO Wen，WANG Xin，BAI Qian. Construction mechanics of in-situ expansion of the intersection of existing tunnel shaft and main tunnel[J]. Journal of Northeastern University：Natural Science，2021，42(5)：713–719.(in Chinese))
[21] 尉洪利，吴立辉，邵宏杰. 狮子坪隧道交叉断面结构安全研究[J]. 公路，2020，65(10)：355–360.(WEI Hongli，WU Lihui，SHAO Hongjie. Study on the safety of Shiziping tunnel cross section structure[J]. Highway，2020，65(10)：355–360.(in Chinese))
[22] 汪勤民，何国辉，汪 飞. 隧道复杂结构受力变形特征及加固效果研究[J]. 公路，2023，68(8)：406–410.(WANG Qinmin，HE Guohui，WANG Fei. Study on mechanical deformation characteristics and reinforcement effect of complex tunnel structures[J]. Highway，2023，68(8)：406–410.(in Chinese))
[23] LI Y，JIN X，LV Z，et al. Deformation and mechanical characteristics of tunnel lining in tunnel inter-section between subway station tunnel and construction tunnel[J]. Tunnelling Underground Space Technology Incorporating Trenchless Technology Research，2016，56(Jun.)：22–33.
[24] 张志强，许 江，万晓燕. 公路长隧道与横通道空间斜交结构施工力学研究[J]. 岩土力学，2007，28(2)：247–252.(ZHANG Zhiqiang，XU Jiang，WAN Xiaoyan. Study on tunnel construction mechanics at intersection of horizontal adit and major tunnel in highway[J]. Rock and Soil Mechanics，2007，28(2)：247–252.(in Chinese))
[25] 张志强，苏江川，姜元俊. 马王槽主隧道与横通道交叉部施工受力特征数值模拟分析[J]. 公路交通科技，2007，24(1)：109–113. (ZHANG Zhiqiang，SU Jiangchuan，JIANG Yuanjun. Three-dimensional fem simulation analysis of construction of intersection of transverse gallery and main tunnel[J]. Journal of Highway and Transportation Research and Development，2007，24(1)：109–113.(in Chinese))
[26] 石继训. 长大山岭隧道斜井与正洞交叉段数值模拟及分析[硕士学位论文][D]. 重庆：重庆交通大学，2014.(SHI Jixun. Numerical simulation and analysis of cross section between inclined shaft and normal tunnel in Long Mountain tunnel[M. S. Thesis][D]. Chongqing：Chongqing Jiaotong University，2014.(in Chinese))
[27] 罗彦斌，陈建勋，王梦恕. 隧道斜交横通道施工对主隧道衬砌结构的影响研究[J]. 岩石力学与工程学报，2010，29(增2)：3 792– 3 798.(LUO Yanbin，CHEN Jianxun，WANG Mengshu. Study of influence of skew horizontal adit tunnel construction on main tunnel lining structure[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(Supp.2)：3 792–3 798.(in Chinese))
[28] 中华人民共和国行业标准编写组. TB 10003—2016 铁路隧道设计规范[S]. 北京：中国铁道出版社，2017.(The Professional Standards Compilation Group of the People?s Republic of China. TB 10003—2016 Code for design of railway tunnel[S]. Beijing：China Railway Press，2017.(in Chinese))
[29] 杨林霖，杨文波，田浩晟，等. 考虑围岩短期蠕变效应的隧道双层初期支护变形控制研究[J]. 岩石力学与工程学报，2023，42(7)： 1 731–1 742.(YANG Linlin，YANG Wenbo，TIAN haosheng，et al. Study on deformation control of double-layered initial support in tunnels considering short-term creep effects of surrounding rock[J]. Chinese Journal of Rock Mechanics and Engineering，2023，42(7)：1 731–1 742.(in Chinese))
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