岩土工程学报2017，Vol.39Issue(2)：311-318,8.DOI:10.11779/CJGE201702015
玄武岩纤维混凝土隧道衬砌承载特性模型试验研究
Model tests on bearing characteristics of basalt fiber-reinforced concrete tunnel linings
摘要
Abstract
Basalt fiber is a kind of inorganic material, which is effective and environmentally friendly. Basalt fiber concrete has important mechanical advantages to control the deformation of soft rock tunnels because it has functions such as strengthening, toughening, crack resistance and so on. Through the indoor model tests on mechanical behaviors of reinforced concrete and basalt fiber-reinforced concrete, the bearing characteristics of lingings of basalt fiber concrete linings are investigated. The test results show that compared with that of the reinforced concrete lining, the initial crack load of the basalt fiber concrete lining increases by 20 percent. The lining structure gets tougher after it is mixed with basalt fiber, moreover, after occurrence of the initial crack, the linings can also bear larger bending moment and deformation. The bearing characteristic curves of linings of the reinforced concrete and basalt fiber concrete exhibit linear change before the initial crack. After the initial crack, the curve of the reinforced concrete rises slowly before rapid convergence. The curve of the basalt fiber concrete increases to two times the value of the initial crack load and there is no convergence trend. Therefore, the basalt fiber concrete can satisfy both the requirements that the rock surface of the soft wall rock tunnel should be closed as soon as possible and the linings can provide supporting force with a certain deformation ability as soon as possible. The research results are extremely important to the control of large deformation of soft rock.关键词
隧道工程/玄武岩纤维混凝土/承载特性/模型试验Key words
tunnel engineering/basalt fiber-reinforced concrete/bearing characteristic/model test分类
建筑与水利引用本文复制引用
崔光耀,王道远,倪嵩陟,朱长安,袁金秀,周济民..玄武岩纤维混凝土隧道衬砌承载特性模型试验研究[J].岩土工程学报,2017,39(2):311-318,8.基金项目
国家自然科学基金项目(51408008、51478277) （51408008、51478277）
国家十二五科技支撑项目(2012BAK09B06) （2012BAK09B06）
国家重点基础研究发展计划(" 973"计划)项目(2010CB732105) （" 973"计划）
河北省自然科学基金项目(E201619002) （E201619002）
四川省应用基础研究计划项目(2014JY0090 、2015JY0166) （2014JY0090 、2015JY0166）
四川省交通科技项目(2013A1-5) （2013A1-5）
河北省高等学校科学技术研究青年基金项目(QN2014161,QN2016240) （QN2014161,QN2016240）
北方工业大学青年拔尖人才培育计划项目(XN070017) （XN070017）
