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| Analysis of Comprehensive Treatment and Monitoring of Landslide at Tunnel Face |
| WANG Ya - qiong1, WANG Kai - yun1 ,LAI Jin - xing1, LI Feng - ning2, NIU Fang - yuan1 |
| (1. Shaanxi Provincial Major Laboratory for Highway Bridge & Tunnel, Chang’ an University, Xi’ an，Shaanxi 710064， China; 2. Shaanxi Railway Investment Corporation, Xi’an，Shaanxi 710054，China) |
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Abstract Research purposes ： Because of engineering geologic condition, hydrogeological condition and some human activities, it is easy to result in landslide and construction difficulty at tunnel face. Taking into account the geological condition and the landslide feature of a tunnel in the eastern part of Qinghai - Tibet Plateau, the mechanism of landslide is analyzed in four aspects such as geological effect, construction impact, stress function and artificial factor and the stability of landslide is evaluated. Furthermore, a relevant comprehensive treatment design is put forward and the feedback monitoring data are dynamically analyzed and contrasted.
Research conclusions :(1) The stability of bad geological body in tunnel portal excavation has changed significantly, and the stability coefficient is reduced in different degree; (2 ) The monitoring results show that the comprehensive control measures such as anti slide pile, anchor cable anti slide pile and reinforced support in the bad geological body, the slope and the tunnel are all in a safe state, and the effect of treatments is good; ( 3 ) The research results can be applied to the similar engineering of tunnel crossing landslide, with strong reference and guiding significance.
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Received: 26 June 2015
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2015, Vol. 32 
