西安理工大学学报2024，Vol.40Issue(1)：132-142,11.DOI:10.19322/j.cnki.issn.1006-4710.2024.01.013
拉压复合型锚杆锚固机理的数值及模型试验应用研究
Numerical and model experimental application study on the anchoring mechanism of tensile and compression composite anchor rods
摘要
Abstract
In view of the limitation of the supporting effect of the full-length grouting anchor in the deep tunnel,in order to effectively control the deformation of the surrounding rock of the tunnel and enhance the bearing capacity of the anchor,this paper uses the finite element numeri-cal simulation method to study the interface failure characteristics and mechanical transmission mechanism of the tension-compression composite anchor support structure under the pull-out load the reinforcement of the rock tunnel,and applies the anchor to the overload model test to explore the supporting performance of the anchor.The results show that the mechanical evolution of the contact interface between anchorage body and surrounding rock has experienced the progressive failure process of elastic stage,plastic softening stage and slip stage.The transfer of shear force at the interface also appears at the bearing plate from the small drawing load,and transfers to both sides of the anchorage section with the increase of the drawing load,showing a bimodal trend.According to the shear stress distribution law of the bolt interface,the shear stress distri-bution model of composite bolt at low load and high load drawing is put forward.This model is u-niversal.The indoor overloading model test shows that the supporting effect of composite bolt is better than that of ordinary bolt.This study can value for the application of composite bolt in un-derground engineering such as deep tunnel.关键词
拉压复合型锚杆/渐进失效/界面力学演化/数值模拟/模型试验Key words
tension-compression composite anchor/progressive failure/interface mechanical evo-lution/numerical simulation/model test分类
矿业与冶金引用本文复制引用
杨林,朱训国,夏洪春,杨帅..拉压复合型锚杆锚固机理的数值及模型试验应用研究[J].西安理工大学学报,2024,40(1):132-142,11.基金项目
国家自然科学基金资助项目(51374045) （51374045）
辽宁振兴人才计划资助项目(XLYC1807219) （XLYC1807219）
大连大学省重点实验室平台基金资助项目(202101ZD02) （202101ZD02）
大连大学科研创新创业团队资助项目(XQN202002) （XQN202002）
