【摘要】 利用模型试验和理论研究了在平面应力波的作用下,地下洞室振动加速度分布规律。结果表明:当洞室受到拱顶正上方平面波作用时,拱顶径向振动加速度是4个测量数据中最大的,是振动最激烈的地方;当入射方向从拱顶向左侧偏移至水平方向,迎爆侧的径向加速度都比背爆侧的径向加速度大;当入射方向在拱顶时,切向振动加速度从拱顶至侧墙是先增加后减小,入射方向在拱腰处,拐角的切向振动加速度应该注意;对比洞室的径向加速度和切向振动加速度,洞室的振动加速度允许峰值是由径向加速度控制。这将对实际工程进行抗爆设计非常有意义。更多还原

【Abstract】 Based on model experiments and theory,the distribution of vibration acceleration of underground chambers was studied under the planar waves.The results show that when underground chambers are acted by planar waves from vault,the radial acceleration of roof is maximal in four monitored data;when the incident direction changing from vault to rib,the radial acceleration from face-blast side is larger than the back-blast side’s;when the incident direction from vault,the tangential accelaeration increases firstly and then decreases from roof to side wall;the tangential acceleration of the corner should be attention when the incident direction from extrado.Compared to the radial acceleration and tangential acceleration,the permitted peak acceleration of underground chamber is controlled by radial acceleration,which is very meaning for practical engineerings to explosion resistance design.更多还原