Abstract：In order to study the bearing characteristics of the deep-buried tunnel anchorage in the fractured rock mass, and in the engineering background of Luding Dadu river Bridge, according to the peak shear strength parameters of the contact surface between concrete and rock mass obtained by in-situ test, the safety factor of the anchor plug was obtained. The in-situ test results of the 1∶10 scale model anchor were introduced, and the ultimate load and strength characteristics of the model anchor were studied. Finally, the overall stability of the tunnel anchor was evaluated, and the construction proposal was put forward. The results show that the safety factor of the anchor plug is 3.48, which meets the stability requirements of the specification. The model anchor has a limit load of 7.80P （P is the design load）and the model anchor system yield load characteristic point of 5.25P.
British Standards Institute. Steel，concrete and composite bridges：part3：code of practice for design of steel bridges：BS 5400-3：1982[S]. London：[s.n.]，2000.
[3]
American Associationof State Highway and Transportation Officals. Standard specifications for highway bridges[S]. Washington D. C.：The American Association of State Highway and Transportation Officials Inc.，1996.
[4]
朱玉. 隧洞锚设计体系中的关键问题研究与实践[D]. 武汉：华中科技大学，2005.
[5]
邬爱清,彭元诚,黄正加,等. 超大跨度悬索桥隧道锚承载特性的岩石力学综合研究[J]. 岩石力学与工程学报,2010,29(3): 433-441WU Aiqing, PENG Yuancheng, HUANG Zhengjia, et al. Rock mechanics comprehensive study of rearing capacity characteristics of tunnel anchorage for super-large span suspension bridge[J]. Chinese Journal of Rock Mechanics and Engineering, 2010, 29(3): 433-441
[6]
汪海滨. 悬索桥隧道式复合锚碇系统作用机理研究[D]. 成都：西南交通大学，2005.
[7]
江南. 铁路悬索桥隧道式锚碇承载机理及计算方法研究[D]. 成都：西南交通大学，2014.
[8]
曾钱帮,王思敬. 基于虚功原理的悬索桥隧道式锚碇边坡稳定性分析[J]. 工程地质学报,2007,15(1): 22-32ZENG Qianbang, WANG Sijing. Stability analysis of a fractured rock mass slope used as the foundation for a tunnel type anchorage of suspension brige at Baling River[J]. Rock and Soil Mechanics, 2007, 15(1): 22-32
[9]
廖明进,王全才,袁从华,等. 基于楔形效应的隧洞锚抗拔承载能力研究[J]. 岩土力学,2016,37(1): 185-202LIAO Mingjin, WANG Quancai, YUAN Conghua, et al. Research on the pull-out capacity of the tunnel-type anchorage based on wedge-effect[J]. Rock and Soil Mechanics, 2016, 37(1): 185-202
[10]
陶齐宇,李佰龙,王中豪,等. 悬索桥岩基力学参数试验研究[J]. 重庆交通大学学报(自然科学版),2018,37(2): 9-14TAO Qiyu, LI Bailong, WANG Zhonghao, et a1. Experiment study on mechanical parameters of rock foundation of suspension bridge[J]. Journal of Chongqing Jiaotong University (Natural Science), 2018, 37(2): 9-14
[11]
郭喜峰,周火明,程强,等. 特大悬索桥隧洞锚岩石力学综合研究特大悬索桥隧洞锚岩石力学综合研究[J]. 中国科学:技术科学,2018,48(7): 799-809GUO Xifeng, ZHOU Huoming, CHENG Qiang, et a1. Rock mechanics comperhensive study of tunnel anchorage for super large suspension bridge[J]. Scientia Sinica Technologica, 2018, 48(7): 799-809
[12]
文丽娜,程谦恭,程强,等. 泸定大渡河特大桥隧洞锚模型变形试验研究[J]. 铁道工程学报,2017,34(1): 52-59WEN Lina, CHENG Qiangong, CHENG Qiang, et a1. Deformation experiment research on the model tunnel anchorage of dadu river bridge in luding[J]. Journal of Railway Engineering Society, 2017, 34(1): 52-59
