在爆破震动作用下地下硐室震动速度分布规律  

Distribution of blasting vibration velocity of underground chamber by blasting

作　　者：周建伟[1,2] 王光勇[1] 王有凯[1] 

机构地区：[1]河南理工大学土木工程学院,河南焦作454000 [2]中铁第二十局集团第七工程有限公司,甘肃兰州730000

出　　处：《辽宁工程技术大学学报（自然科学版）》2013年第9期1172-1177,共6页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然基金资助项目(41072225);河南理工大学青年骨干教师基金资助项目(649212)

摘　　要：为保证爆破震动作用下各种地下硐室的稳定性,参考模型试验,利用波的函数展开法分析了爆炸震动入射角、频率和洞径对震动速度的影响.研究结果表明:当硐室受到拱顶正上方平面波作用时,拱顶径向震动速度是4个测量数据中最大的,当入射方向从拱顶向左侧偏移至水平方向,迎爆侧的径向速度都比背爆侧的径向速度大,当入射方向在拱顶时,切向震动速度从拱顶至侧墙是先增加后减小,入射方向在拱腰处,拐角的切向震动速度应该注意;随着频率的增加,震动径向速度和切向震动速度都相应增大;在迎爆侧,硐室洞径越大,径向震动速度和切向速度越大;在背爆侧,硐室洞径越大,径向震动速度和切向速度越小.In order to provide stability of underground chambers,based on model tests,the wave function expansion method was used to analyze the influence of the incident angle,frequency and diameter on blasting vibration velocity of underground chamber.It is obtained that when the cavern was under the plane waves of the vault,the radial vibration velocity of the vault is the largest among the four measured data.When the incidence direction offsets from the vault to the horizontal direction on the left,the radial velocity facing burst is larger than the radial velocity back of the burst.When the incident direction is on the dome,the tangential vibration velocity will increase first and then decrease from the vault to the side wall.When the incident direction is at the haunch,the tangential vibration velocity in the corner should be noticed.With increasing of the frequency,the radial vibration velocity and tangential vibration velocity increase accordingly.At the forward part of the burst,the larger the chamber diameter,the bigger the radial and tangential velocities.At the back side of the burst,the bigger the chamber diameter,the smaller the radial and tangential vibration velocities.

关 键 词：地下硐室 爆破震动 入射角 震动频率 洞径 震动速度 函数展开法 数值分析 

分 类 号：TU435[建筑科学—岩土工程]