长江科学院院报2017，Vol.34Issue(6)：97-102,6.DOI:10.11988/ckyyb.20160221
各向异性片岩隧道支护结构承载力学特性研究
Bearing Mechanics Behavior of Supporting Structures in Anisotropic Schist Tunnel
摘要
Abstract
In the aim of better understanding the distribution of forces on the supporting structures in anisotropic schist tunnel,the bearing behavior of preliminary bracing and secondary lining of surrounding rocks with different schistosity plane angles in Wudang group schist tunnel area are monitored and measured.Analysis of the measured data reveals that the load shared by secondary lining is much greater than that by preliminary bracing when the surrounding rock is stable.Rock load shared by most secondary linings accounts for up to 80％-90％,which suggest that the beating ratios of some sections exceed the standard in specifications,posing large impact on the stability of secondary lining in the subsequent operation.Supporting structure of schist tunnel shows obvious anisotropy.When the schistosity plane angles are less than 45°-55°,the lateral force when supporting structure is stable shows an increasing trend with the increase of schistosity plane angles,and a steep decrease when the schistosity plane angle is larger than 45°-55°.Forces of different parts of support structure are apparently different and obviously asymmetrical,and forces of surrounding rock of schist tunnel and supporting structure has consequent bias characteristics.关键词
片岩隧道/各向异性/监控量测/支护结构/承载特性Key words
schist tunnel/anisotropy/monitoring and measurement/supporting structure/bearing behavior分类
交通工程引用本文复制引用
孔凡水,左昌群,李涛,侯东波..各向异性片岩隧道支护结构承载力学特性研究[J].长江科学院院报,2017,34(6):97-102,6.基金项目
国家自然科学基金项目(41202201,41102196,51379194) （41202201,41102196,51379194）
中央高校基本科研业务费专项资金项目(CUGL110215) （CUGL110215）
国土资源部公益性行业科研专项经费项目(201211039) （201211039）
