地下结构头部在精确打击下的毁伤试验研究  

The Damage Test Investigation of Underground Structure Heads Subjected to Precision Strikes

作　　者：田强[1] 郑云木[1] 王起帆[1] 冯国祥[2] 

机构地区：[1]后勤工程学院军事建筑工程系,重庆401331 [2]成都军区工程科研设计院,昆明650222

出　　处：《地下空间与工程学报》2010年第6期1125-1129,1151,共6页Chinese Journal of Underground Space and Engineering

基　　金：总后科研基金资助项目(080706)

摘　　要：为研究精确打击条件下地下结构头部段的毁伤特点,根据爆炸相似律进行了圆柱形装药在头部围岩中三种爆炸位置的模型爆炸试验。试验结果显示,直墙段是结构最易受损部位,装药在直墙侧方爆炸时,结构毁伤程度最严重;地下结构头部动荷载段计算假定装药位置在拱顶正上方爆炸为最不利情况偏于危险,可通过在现行动荷载计算公式中引入装药爆炸位置影响系数,完善计算公式未能考虑爆炸位置因素影响的缺陷;分析直墙拱结构的受力特点,并建议采用曲拱结构形式应对精确打击的防护需求。In order to investigate the damage of underground structure heads subjected to precision strikes,model blasting tests of cylindrical charge were carried out in the rock of head according to explosion similarity at three different explosion locations.It was shown that the damageable part of structure was straight wall and the most serious damage situation of structure was explosion beside the straight wall;the hypothesis of explosion location above the vault was at stake in present dynamical blasting loads calculation of underground structure heads,the influence coefficient of charge explosion location was suggested to introduce in dynamical blasting loads calculation to perfect the formula which ignoring the influence of explosion location;at last,the arch structure was more suitable for the protective requirement in precision strikes after mechanic analysis of straight-wall-arch structure.

关 键 词：地下结构 头部 精确打击 毁伤试验 

分 类 号：O383[理学—流体力学]