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| 隧道爆破施工对地表框架结构的影响分析 |
| Impact Analysis of Tunnel Blasting on the Surface Frame Structure |
| 投稿时间：2017-06-21 |
| DOI：10.16018/j.cnki.cn32-1650/n.201801011 |
| 中文关键词: |
| 英文关键词: Tunnel blasting construction frame structure |
| 基金项目: |
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| 中文摘要: |
| 以重庆某隧道爆破施工为研究背景，对开挖过程中地表建筑的震动进行监测，并辅以ANSYS/LS-DYNA进行仿真分析，通过流固耦合的方法，建立隧道炸药爆破有限元模型，分析隧道埋深15 m时，8层框架结构在隧道爆破作用下的动力响应特性，以掌握结构的最大应力值以及房屋振动速度传播规律。结果表明，结构受隧道爆破影响最明显的在竖直方向，最大可以达到6.76 cm/s，后在2～3 cm/s左右波动，与实测数据均值2.38 cm/s比较接近；炸药的作用对结构产生的最大应力为2.4 MPa左右，远远低于材料屈服失效强度。 |
| 英文摘要: |
| Taking the blasting construction of a tunnel in Chongqing as the research background, the vibration of the surface building in the process of excavation is monitored. The simulation analysis is carried out with ANSYS/LS-DYNA, and the finite element model of tunnel explosive blasting is established by the method of fluid solid coupling. Based on the analysis of the dynamic response characteristics of the 8 story frame structure under the blasting action of tunnel, the maximum stress value of the structure and the propagation rule of the vibration velocity of the building are obtained when the tunnel depth is 15m. The results show that the most obvious influence of tunnel blasting is vertical direction, the maximum can reach 6. 76cm/s, and finally fluctuates from 2~3 cm/s, which is close to the average 2. 38 cm/s of measured data. The maximum stress produced by the action of explosives to the structure is about 2. 4Mpa. It is far below the yield failure strength of the material. |
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