一种新型分级让压锚杆作用原理及其力学特性实验研究  

Experimental Study on the Working Principle and Mechanical Properties of a New Type of Graded Yield Bolt

作　　者：杨琦 郑致 YANG Qi;ZHENG Zhi(School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074)

机构地区：[1]重庆交通大学土木工程学院,重庆400074

出　　处：《广州建筑》2025年第3期1-7,共7页GUANGZHOU ARCHITECTURE

基　　金：重庆交通大学研究生科研创新项目资助(2024S0011)。

摘　　要：本研究提出了一种创新的让压装置设计方法,重点介绍了一种新型分级让压锚杆及其在大变形隧道支护中的关键结构特征和应用优势。通过系统性的让压特性试验,深入研究了该新型让压装置的变形机理、破坏形式以及让压荷载和让压距离对其性能的影响。进一步采用拉拔试验对该分级让压锚杆的变形特性进行了详细分析,绘制了其应力-应变关系曲线,并与传统普通锚杆进行了全面对比。研究结果表明,新型分级让压锚杆结构设计紧凑高效,能够更好地适应围岩大变形,为隧道支护工程提供了更为可靠的技术解决方案和实践路径。该研究对提升工程安全性和可持续性具有重要意义,并为隧道支护领域的技术发展提供了新的思路和创新动力。This study proposes an innovative design method for yielding devices,with a focus on introducing a new type of graded yielding anchor rod and its key structural features and application advantages in large deformation tunnel support.Through systematic yielding characteristic tests,the deformation mechanism,failure mode,and the influence of yielding load and yielding distance on the performance of the new yielding device were deeply studied.Further detailed analysis was conducted on the deformation characteristics of the graded compression anchor rod using pull-out tests,and its stress-strain relationship curve was plotted,which was comprehensively compared with traditional ordinary anchor rods.The research results indicate that the new graded anchor rod structure design is compact and efficient,and can better adapt to large deformation of surrounding rock,providing a more reliable technical solution and practical path for tunnel support engineering.This study is of great significance for improving engineering safety and sustainability,and provides new ideas and innovative impetus for the technological development of tunnel support.

关 键 词：分级让压锚杆 让压距离 让压荷载 

分 类 号：U455.71[建筑科学—桥梁与隧道工程]