海底地铁隧道光面爆破技术研究

发布时间：2018-06-25 15:23

本文选题：海底地铁隧道 + 数值模拟　；参考：《山东科技大学》2017年硕士论文

【摘要】：青岛地铁1号线瓦贵区间海底隧道是我国第一条跨海的地铁隧道。目前,世界上的海隧道的工程相对较少,类似的工程经验并不太多。应用钻爆法施工的海底隧道工程并未形成一套完整的体系。本文作者参与了青岛地铁一号线瓦贵区间海底地铁隧道施工关键技术的研究。为使得隧道安全、高效、快速施工,研究了光面爆破参数对围岩力学响应特性的数值模拟,将光面爆破技术应用于海底地铁隧道,提出了控制光面爆破有害效应的措施,对爆破振动衰减系数K、α值进行了回归分析。取得了如下的成果:(1)通过应用ANSYS/LS-DYNA软件,建立数值模型,有针对性的布置测点,研究了炮孔间距、抵抗线、单孔装药量对光面爆破周边眼之间岩石力学特征的影响。(2)根据岩石光面爆破理论及数值模拟结合,结合现场实际情况将光面爆破技术应用到了海底地铁隧道,形成了合理的光面爆破参数。(3)结合青岛地铁1号线瓦贵区间海底隧道的爆破施工,对爆破产生的噪声、飞石、有害气体进行了简单的分析,并提出了具体的控制措施。(4)基于最小二乘法对海底隧道爆破时质点的振动速度进行回归分析,得到了青岛海底隧道花岗岩,海底埋深30～40m条件下的K、α值。K=76.2, α=1.46。
[Abstract]:Qingdao Subway Line 1 is the first cross-sea subway tunnel in China. At present, there are relatively few sea tunnels in the world, and there is not much experience in similar projects. The subsea tunnel project constructed by drilling and blasting method has not formed a complete system. The author of this paper has participated in the research on the key technology of the construction of the subsea subway tunnel in the Waigui section of Qingdao Metro Line 1. In order to make the tunnel safe, efficient and fast construction, the numerical simulation of the mechanical response of smooth blasting parameters to surrounding rock is studied. The smooth blasting technology is applied to the submarine subway tunnel, and the measures to control the harmful effect of smooth blasting are put forward. The attenuation coefficient K, 伪 of blasting vibration is regressed. The results are as follows: (1) by using ANSYS / LS-DYNA software, the numerical model is established, and the hole spacing and resistance line are studied. The effect of single hole charge on rock mechanics characteristics between peripheral holes of smooth blasting. (2) according to the combination of rock smooth blasting theory and numerical simulation, combined with the actual situation of the site, the smooth blasting technology is applied to the submarine subway tunnel. The reasonable smooth blasting parameters have been formed. (3) combined with the blasting construction of the subsea tunnel in Wagugui section of Qingdao Metro Line 1, the noise, flying stone and harmful gas produced by the blasting are simply analyzed. The specific control measures are put forward. (4) based on the least square method, the vibration velocity of the particle during blasting is regressed, and the K, 伪 value, K = 76.2, 伪 ~ (1.46) of the granite in Qingdao Subsea Tunnel are obtained under the condition of 30 ~ 40 m undersea depth.
【学位授予单位】：山东科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U455.6

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