摘要
采用一维震塌模型,运用拉应力累积损伤破坏准则,分析常规爆炸作用下坑道震塌剥落条件,针对钢纤维喷射混凝土支护,结合现行有关规范,推导出震塌剥落层速度的实用计算方法,并运用数值模拟手段对计算结果进行验证,通过钢纤维喷射混凝土支护坑道的震塌剥落层速度与其他支护类型及毛洞的震塌剥落层速度对比,量化说明钢纤维喷射混凝土支护抗爆炸震塌的能力。
According to the failure criterion of cumulating damage and one-dimensional spalling model, the condition of collapse induced by conventional explosion has been analyzed. According to correlative standards, the practical calculation method is achieved aiming at the steel fiber shotcrete support used in tunnel. The comparison between the calculated result and the numerical one shows that the calculation method is valid. In order to illuminate the.resistance performance of steel fiber shotcrete induced by the conventional explosion quantitatively, the velocities of rockfalls from the top of tunnel supported by steel fiber shotcrete are compared with that of the tunnel supported by other kinds of support and that of the tunnel without support. The practical calculation methods offered can provide some references for design of steel fiber shotcrete support in tunnel.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2006年第7期1437-1442,共6页
Chinese Journal of Rock Mechanics and Engineering
关键词
爆炸力学
震塌
钢纤维喷射混凝土
坑道支护
数值模拟
explosion mechanics
spallation
steel fiber shotcrete
tunnel support
numerical simulation
