摘要
软岩隧道围岩自稳能力差、变形扩容效应显著,软岩大变形灾害是隧道施工过程中亟须解决的关键问题之一。针对传统锚杆在软岩隧道中锚固效果不佳的问题,研发了一种新型单/双泡让压自适应锚索,对比分析了新型锚索的力学性能,并探讨了其在某软岩隧道中的锚固效果。结果表明:研发的单泡让压自适应锚索不仅保证了锚索强度,而且显著提高了弹性和塑性让压变形能力,较无让压锚索其塑性让压距离达30 mm;某软岩隧道采用该让压自适应锚索后,通过监测锚索受力和围岩变形量,发现该让压自适应锚索对该隧道围岩变形及其稳定性控制是有效的。研究结果对提高软岩隧道施工质量和安全性,以及指导类似工程的设计与施工具有重要意义。
The surrounding rock of soft rock tunnel has poor self-stability and obvious deformation and expansion effect,and the large deformation disaster of soft rock is one of the key problems to be solved in tunnel construction.In this paper,a new type of single/double bubble pressure adaptive anchor cable is developed to solve the problem of poor anchoring effect in a soft rock tunnel.The mechanical properties of the new cable are compared and analyzed,and its anchoring effect in a soft rock tunnel is discussed.The results show that the single-bubble pressure-yielding adaptive anchor cable not only guarantees the strength of the anchor cable,but also significantly improves the elastic and plastic pressure-yielding deformation ability,and the plastic pressure-yielding distance of the anchor cable is 30mm compared with the non-pressure-yielding cable.By monitoring the stress of the anchor cable and the deformation of surrounding rock,it is found that the adaptive anchor cable is effective in controlling the deformation and stability of surrounding rock in a soft rock tunnel.The research results are of great significance to improve the construction quality and safety of soft rock tunnel and to guide the design and construction of similar projects.
作者
李海波
郭鸿雁
储亮
龙茜
Li Haibo;Guo Hongyan;Chu Liang;Long Qian(Guangxi Xinfazhan Communication Group Co.,LTD,Nanning 530026,Guangxi,China;China Merchants Chongqing Traffic Research and Design Institute Co.,LTD,Chongqing 400074,China;Chongqing City Investment Infrastructure Construction Co.,LTD,Chongqing 400074,China)
出处
《绿色科技》
2024年第20期227-232,共6页
Journal of Green Science and Technology
基金
广西科技计划项目(编号:桂科AB20238036)。
关键词
自适应锚索
拉拔试验
承载性能
变形控制
工程应用
adaptive anchor cable
drawing test
load-carrying performance
deformation control
engineering application
作者简介
第一作者:李海波(1977-),男,副高级工程师,主要从事高速公路建设、运营及安全管理方面研究。
