Study on High Stress of Cuihuashan Super Long Tunnel in Qinling Mountain Area

DU Shi － hui

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Journal of Railway Engineering Society ›› 2012, Vol. 29 ›› Issue (2) : 55-58,63.

Study on High Stress of Cuihuashan Super Long Tunnel in Qinling Mountain Area

DU Shi － hui

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Abstract

Research purposes: About of the high stress of the deep － buried long tunnel，there are many theories and criterions，and the different criterions are used for the different industries and projects． How to predict the geologicaldisaster of rock outburst to direct the safe construction is a question． Through the survey prediction and construction verification of the Cuihuashan Super Long Tunnel in Qinling Mountain area，this paper studies the issues of the high stress of tunnel and how to predict the geological disaster of rock outburst．

Research conclusions: As the included angle between the maximum horizontal principal stress direction and tunnel axis direction of the Cuihuashan Super Long Tunnel is over large，the rock outburst is inevitable． The conclusion that there is possible to happen thge rock outburst obtained by calculating stress parameters and rock parameters has a certain one － sidedness． The construction practice of the Cuihuashan Tunnel proves that the rock outburest should be assessed by using various criterions to make the prediction closer to the actual situation．

Key words

tunnel / crustal stress / rock outburst / criterion

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DU Shi － hui. Study on High Stress of Cuihuashan Super Long Tunnel in Qinling Mountain Area[J]. Journal of Railway Engineering Society, 2012, 29(2): 55-58,63

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