Laboratory model test on “wedge-effect” of pullout capacity of tunnel-type anchorage

XIONG Xiao-rong; TANG Hua; LIAO Ming-jin; YIN Xiao-tao; WANG Dong-ying

doi:10.16285/j.rsm.2018.0405

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Laboratory model test on “wedge-effect” of pullout capacity of tunnel-type anchorage

更新时间：2026-06-25

- Laboratory model test on “wedge-effect” of pullout capacity of tunnel-type anchorage
- Vol. 39, Issue S1, Pages: 181-190(2018)
- 作者机构：
  
  1. 中国科学院武汉岩土力学研究所,湖北,武汉,430071
  2. 中国科学院大学,北京,100049
  3. 武汉科技大学,湖北,武汉,430065
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2018.0405
  CLC： U452
- Online First：02 September 2018，
  
  Published：2018
- 稿件说明：
移动端阅览
XIONG Xiao-rong, TANG Hua, LIAO Ming-jin, et al. Laboratory model test on “wedge-effect” of pullout capacity of tunnel-type anchorage[J]. 2018, 39(S1): 181-190.
DOI：

XIONG Xiao-rong, TANG Hua, LIAO Ming-jin, et al. Laboratory model test on “wedge-effect” of pullout capacity of tunnel-type anchorage[J]. 2018, 39(S1): 181-190. DOI： 10.16285/j.rsm.2018.0405.

摘要

隧道锚是承担悬索桥主缆荷载的关键受力部件，隧道锚–围岩联合承载力学机制较为复杂。通过研究隧道锚简化的力学模型，得到基于 “楔形效应”的隧道锚抗拔承载力计算方法。为进一步验证该方法的合理性与正确性，考虑埋深、锚碇长度、围岩类别等影响因素，设计了14组室内模型试验方案，通过模型试验获得了抗拔承载力，研究了各影响因素与抗拔承载力关系。基于室内模型试验的相关参数，采用“楔形效应”计算方法得到隧道锚抗拔承载力，与模型试验结果较为吻合。模型试验获得的影响因素规律和破坏特征也和理论计算方法一致。研究结果表明，考虑“楔形效应”的隧道锚承载力计算方法是科学和合理的，具有力学意义明确、公式形式简明的特点，可为工程实践提供参考。

Abstract

The tunnel-type anchorage is the key force component to bear the main cable load of suspension bridge

and the mechanism of tunnel anchorage and surrounding rock joint bearing is very complicated. The simplified calculation model of tunnel anchor is established; and a formula for calculating the pullout capacity of tunnel anchor is deduced by using the wedge effect method. Furthermore

in order to verify the rationality and correctness of the "wedge effect" calculation method

the 14 groups corresponding indoor model tests are designed and carried out. Through the model tests

the uplift bearing capacity is obtained; and the relationship between the influence factors and the uplift capacity is studied. With the accurate related parameters of indoor model

using the calculation method of bearing capacity of indoor tunnel anchor model

and contrasted it with the results of model test

the results show that the theoretical calculation results are consistent with the law of influence factor and destruction characteristic. Research results show that it is scientific and reasonable to calculate the bearing capacity of tunnel anchorage by the simplified formula considering the “wedge effect”. This calculation method has the characteristics of clear mechanical meaning and concise formula form

so as to provide reference for engineering practice.

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