| The neighborhood tunnel has become a research hotspot in recent years. However, near tunnels impact each other greatly when being excavated because of its specialty of this tunnel structure. Dozens of key questions are to be solved in the design and construction process, so it is highly necessary to typically study the neighborhood tunnel.Based on Hanfushan tunnels, this paper has done delicately research on its reasonable spacing of the three-hole neighborhood tunnel with the method of theoretical analysis, numerical simulation and theatre test at the scene.In this thesis, the main contents are followed:Firstly, research value and research status on three-hole parallel neighborhood tunnels have been elaborated in detail. Meanwhile, using FLAC3D, we've analyzed and compared the factors impacting the reasonable spacing of three-hole neighborhood tunnels, determined a reasonable spacing of the three-hole parallel neighborhood tunnel, so as to provide a reference for the similar project concerned.Secondly, according to the actual monitoring of blasting vibration of Hanfushan tunnels, the dynamic responses of different points and different parts in adjacent chambers have been analyzed and compared. The influence of blasting stress wave on adjacent chambers has been researched as well.Thirdly, Based on Hanfushan three-hole neighborhood tunnels, applying MIDAS/GTS, we've analyzed the influence on adjacent chambers with different spacing by blasting loads. Useful conclusions have been attained, offering certain reference value to the design and construction of neighborhood tunnels. |
PDF Full Text Request