东北大学学报（自然科学版）

东北大学学报（自然科学版） ›› 2022, Vol. 43 ›› Issue (12): 1792-1799.DOI: 10.12068/j.issn.1005-3026.2022.12.017

• 资源与土木工程 • 上一篇    下一篇

型钢框架-锚索-岩土体耦合蠕变行为

高幸1， 王维玉2， 贾金青1   

  1. (1. 大连理工大学 海岸与近海工程国家重点实验室， 辽宁 大连116024； 2. 河北省建筑科学研究院， 河北 石家庄050021)
  • 发布日期:2022-12-26
  • 通讯作者: 高幸
  • 作者简介:高幸(1992-)，男，河北秦皇岛人，大连理工大学博士研究生； 贾金青(1962-)，男，河北沧州人，大连理工大学教授，博士生导师.
  • 基金资助:
    国家重点研发计划项目(2018YFC1505302)； 国家自然科学基金资助项目(51678112).

Coupled Creep Behavior in Steel Frame-Anchor Cables-Rock and Soil Mass

GAO Xing1， WANG Wei-yu2， JIA Jin-qing1   

  1. 1. The State Key Laboratory of Coastal and Offshore Engineering， Dalian University of Technology， Dalian 116024， China; 2. Research Institute of Architecture Science of Hebei， Shijiazhuang 050021， China.
  • Published:2022-12-26
  • Contact: WANG Wei-yu
  • About author:-
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摘要： 通过现场试验，揭示了型钢框架-锚索-岩土体的耦合蠕变行为，建立了支护体系耦合效应下锚索蠕变模型和锚固力损失计算模型.基于蠕变损伤理论构建了锚固力损失过程中等效蠕变刚度损伤计算模型.研究结果表明，粉土地层中，拉力型锚索在有效锚固长度范围内增加锚固段长度可提高其抵抗蠕变能力，压力型锚索受锚固体挤胀作用影响，可有效减小锚固力损失.型钢框架-锚索-岩土体耦合蠕变模型及锚固力损失计算模型皆展现出较好的计算效果，等效蠕变刚度损伤模型可有效预测等效蠕变刚度的损失状态，并准确描述锚固力的衰减规律.

关键词: 锚索；耦合蠕变；锚固力损失；计算模型；等效蠕变刚度

Abstract: Through field tests， the coupled creep behavior of the steel frame-anchor cable-rock and soil mass is revealed， and the creep model and the anchoring force loss calculation model of anchor cable under the coupling effect of the support system are established. In addition， a calculation model of equivalent creep stiffness damage in the process of anchoring force loss is constructed based on the creep damage theory. The research results demonstrate that increasing the length of the anchorage section within the effective anchorage length range of the tensile anchor cable can improve its creep resistance in silty soil. Meanwhile， the compression anchor cable can effectively reduce anchoring force loss due to the expanding effect of the anchorage section. Both the steel frame-anchor cable-rock and soil mass coupled creep model and the anchoring force loss calculation model show excellent calculation results. The equivalent creep stiffness loss model can effectively predict the loss state of equivalent creep stiffness and accurately describe the attenuation law of anchoring force.

Key words: anchor cables; coupled creep; anchoring force loss; calculation model; equivalent creep stiffness

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