In-situ Experimental Study on Bearing Characteristics of Deep-Buried Tunnel Anchorage in Fractured Rock Mass

被引：0
|
作者：
Guo X. [1 ]
Wang Z. [1 ]
Wu X. [1 ]
机构：
[1] Chongqing Branch Changjiang River Scientific Research Institute, Chongqing
来源：
Xinan Jiaotong Daxue Xuebao/Journal of Southwest Jiaotong University | 2020年 / 55卷 / 06期
关键词：
Bearing characteristic; Safety factor; Scaled model experiment; Tunnel anchorage;
D O I：
10.3969/j.issn.0258-2724.20191077
中图分类号：
学科分类号：
摘要：
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. Copyright ©2020 JOURNAL OF SOUTHWEST JIAOTONG UNIVERSITY. All rights reserved.
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页码：1240 / 1246
页数：6
相关论文
共 12 条
  • [1] (2015)
  • [2] Steel, concrete and composite bridges: part3: code of practice for design of steel bridges: BS 5400-3: 1982, (2000)
  • [3] Standard specifications for highway bridges, (1996)
  • [4] (2005)
  • [5] WU Aiqing, PENG Yuancheng, HUANG Zhengjia, Et al., Rock mechanics comprehensive study of rearing capacity characteristics of tunnel anchorage for super-large span suspension bridge, Chinese Journal of Rock Mechanics and Engineering, 29, 3, pp. 433-441, (2010)
  • [6] (2005)
  • [7] (2014)
  • [8] ZENG 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, Rock and Soil Mechanics, 15, 1, pp. 22-32, (2007)
  • [9] LIAO Mingjin, WANG Quancai, YUAN Conghua, Et al., Research on the pull-out capacity of the tunnel-type anchorage based on wedge-effect, Rock and Soil Mechanics, 37, 1, pp. 185-202, (2016)
  • [10] TAO Qiyu, LI Bailong, WANG Zhonghao, Experiment study on mechanical parameters of rock foundation of suspension bridge, Journal of Chongqing Jiaotong University (Natural Science), 37, 2, pp. 9-14, (2018)
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