岩土力学2011，Vol.32Issue(9)：2577-2583,7.
泡沫混凝土预留变形层对深埋软岩隧道长期稳定性影响研究
Study of effects of foam concrete preset deformation layer on long-term stability of deep soft rock tunnel
摘要
Abstract
Uniaxial and triaxial tests of foam concrete show that the foam concrete which has the capacity of high compressibility can be used as filling material between primary support and secondary lining in deep soft rock tunnel. And the effects of this filling material which is called preset deformations layer on long-time stability of Yi-Ba expressway is studied. The results show that the creep deformation of surrounding rock in deep tunnel still increase after the construction of secondary lining; and it is hardly to be controlled by the method of increasing the thickness of lining; besides, the secondary lining is more easily destroyed by deformation pressure. However, preset deformation layer of foam concrete is able to decrease the deformation pressure on secondary lining by absorbing the creep deformation of rock. As a result, long-term stability of deep soft rock tunnel can be guaranteed by much thinner secondary lining.关键词
深埋软岩隧道/泡沫混凝土/长期稳定性/预留变形层Key words
deep soft rock tunnel/ foam concrete/ long-term stability/ preset deformation layer分类
交通运输引用本文复制引用
陈卫忠,田洪铭,杨阜东,耿亚梅..泡沫混凝土预留变形层对深埋软岩隧道长期稳定性影响研究[J].岩土力学,2011,32(9):2577-2583,7.基金项目
国家自然科学基金(No.40772184). （No.40772184）
