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| CONSTRUCTION TECHNIQUE IN UNSTABLE TUNNEL ACCUMULATED WITH POROUS SURROUNDING ROCK |
| DONG Xin-ping, DING Rui |
| China Railway Tunnel Engineering Bureau |
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Abstract The Zengjiaping Tunnel, Jinzhulin Tunnel, etc. are the typical tunnels with accumulation of porous surrounding rock. The statistics and analyses arc put forward for their design parameters, construction measures, engineering effects and the supervision data. Simulation has been put forward by using ANSYS program for constructing shallow section of Zengjiaping Tunnel. Taking the situations of constructing tunnels accumulated with porous surrounding rock in home and abroad as reference, the support parameters, the anti-collapse measures, as well as the strengthening, antiskid measures and their corresponding construction technologies for unstable tunnels accumulated with porous surrounding rock, are proposed also in this paper.
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Received: 21 January 2001
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2001, Vol. 18 
