泡沫混凝土回填层减震性能影响因素分析  

Influence Factors of Impact Reduction Performance of Foamed Concrete Backfill Layer

作　　者：李利莎[1] 谢清粮[1] 唐黎军 杜建国[1] 张洪海[1] 

机构地区：[1]总参工程兵科研三所,洛阳471023 [2]空军天津航空装备训练基地,天津300134

出　　处：《爆破》2015年第3期166-171,共6页Blasting

摘　　要：为研究泡沫混凝土回填层对地下坑道结构减震性能的影响,通过一个工程算例,建立直接地冲击作用下岩体中坑道结构内部震动响应的计算模型。运用LS-DYNA显式动力分析软件,分别计算了不同回填层影响因素下坑道结构的震动响应。计算结果表明:回填层厚度、泡沫混凝土屈服强度和地冲击荷载强度对隔震效果有着重要影响,这些因素在工程设计回填层时都应予以考虑。The foam concrete backfill layers in the outer layer of tunnel structure could effectively reduce the vi- bration load on tunnel from weapons explosion. To study the influence of shock reduction performance on underground tunnels, based on an engineering example, a calculation model of shock response of the tunnels was established under the direct ground shock. By using LS-DYNA explicit dynamic analysis software ,the shock response of the tunnel with different affecting factors of backfill layers was calculated. Results show that the thickness of backfill layer and yield strength of foam concrete and load intensity of ground shock made important influence on shock isolation effect, all those factors should be considered in the engineering design.

关 键 词：泡沫混凝土 回填层 坑道结构 减震性能 影响因素 

分 类 号：TU352.1[建筑科学—结构工程]