摘要
聚丙烯纤维喷混凝土作为隧道锚喷支护中的新型支护方式,具有施工便捷特点,并可以改善混凝土的性能和耐久性。文章采用非线性有限元法对东巨寺沟硬质围岩铁路隧道进行了大断面开挖-锚喷支护施工全过程分析,分析了施工过程中围岩的位移变形、应力、塑性区分布特征,验证了隧道支护后的围岩稳定性和支护效果。
The polypropylene fiber ture,has the characteristic of easy reinforced concrete,which is a construction and can improve new type of the tunnel lining structhe concrete behavior and durability. To assure the safety in the construction process of the polypropylene fiber reinforced concrete lining structure, the nonlinear finite element method is used to analyze the large section tunnel excavation and the anchor sprayed lining process within the hard rock mass of the Dongjusi railway tunnel. The numerical analysis is carried out to investigate the force and the displacement distribution of the anchor sprayed concrete layer and the plastic distribution region around the tunnel during the large section tunnel excavation and anchor sprayed lining construction process. The rock mass stability and the lining effect after the construction of the lining structure is studied.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2005年第8期897-900,共4页
Journal of Hefei University of Technology：Natural Science
关键词
聚丙烯纤维混凝土
硬岩隧道
大断面开挖
锚喷支护
非线性有限元分析
polypropylene fiber reinforced concrete
hard rock mass of a tunnel
large section excava- tion
anchor sprayed lining
nonlinear finite element analysis
