草帽山隧道爆破振动监测与分析
发布时间：2018-09-01 06:54
【摘要】：隧道洞口段往往受到浅埋、偏压等复杂地形地质条件的影响,岩石较破碎,围岩不稳定,其爆破施工是隧道施工的重点、难点。新建京张高铁草帽山隧道进口洞身106 m长范围为浅埋偏压段,围岩级别为Ⅴ级。在进口段进行了17次有效的爆破振动速度现场监测,通过线性拟合得到合理的萨道夫斯基公式中的系数,计算出爆破施工时的最大单响药量为54.07 kg。对实测数据进行傅里叶变换得到爆破振动的频谱曲线,从中可知:爆破地震波主频率随着爆心距的增大而减小,随着单响最大药量的增大而减小。为了避免出现共振现象,建议爆破施工时避免多段雷管同时起爆,并严格控制最大单响药量。
[Abstract]:The tunnel entrance section is often affected by the complex topographical and geological conditions such as shallow burial, partial pressure and so on. The rock is relatively broken and the surrounding rock is unstable. The blasting construction of the tunnel is the key and difficult point of the tunnel construction. The new Caomaomaishan Tunnel of Beijing-Zhang High Speed Railway has a 106m long range of shallow burying partial pressure, and the surrounding rock grade is grade 鈪，
本文编号：2216450
[Abstract]:The tunnel entrance section is often affected by the complex topographical and geological conditions such as shallow burial, partial pressure and so on. The rock is relatively broken and the surrounding rock is unstable. The blasting construction of the tunnel is the key and difficult point of the tunnel construction. The new Caomaomaishan Tunnel of Beijing-Zhang High Speed Railway has a 106m long range of shallow burying partial pressure, and the surrounding rock grade is grade 鈪，
本文编号：2216450
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