摘要
通过试验和数值模拟分析,研究了隧道喷射活性粉末混凝土单层衬砌支护技术。并对所采用的混凝土配合比设计以及喷射混凝土单层衬砌的抗渗性和耐久性进行了分析。结果表明,采用喷射活性粉末混凝土单层衬砌取代复合式衬砌,可提高软岩地层隧道的承载和防水能力,改善隧道环境。研究结果可为进一步提高隧道施工和支护技术提供参考。
In the light of the drawbacks met in the double-layer lining in soft rock strata, permanent tunnel lining by single-layer reactive powder shotcrete is studied by using numerical simulation and test. The support mechanism of the different kinds of shotcrete lining over the surface of surrounding rock in soft rock tunnel and the influence of the advance rate on the early strength of the shotcrete material are analyzed by means of numerical modeling and the test of reactive powder concrete. Reactive powder concrete （RPC） is a new kind of concrete which has ultra-high strength, high ductility and low permeability. ＂i＇he results of numerical simulation and the test show that the method is satisfactory and the results obtained are valid and thus can be effectively used for design of tunnel lining by reactive powder shotcrete in soft rock strata. The double-layer lining of the tunnel can be substituted by single-layer reactive powder shotcrete lining.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2005年第A02期5505-5508,共4页
Chinese Journal of Rock Mechanics and Engineering
基金
河北省科技攻关计划项目(3213810)
河北大学人才引进项目(2001Y01)
河北省教育厅科研项目(2004308)
关键词
隧道工程
软岩
衬砌
活性粉末混凝土
tunneling engineering
soft rock： tunnel lining
reactive powder concrete
