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| Research on the Method of Surrounding Rock Classification in Large Cross - section Tunnel for Passenger Dedicated Railway Line |
| WANG Chun – lei |
| (TheThird Railway Survey and Design Institute Group Corporation，Tianjin 300142，China) |
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Abstract Research purposes ： It is the indispensable basic data to the surrounding rock classification after accurate judgment for the tunnel design and construction. A perfect and in accordance with the engineering practice of surrounding rock classification method is one of the major problems that must be studied in the construction of railway tunnel. Aiming at the existing problems in surrounding rock classification method of railway tunnel， based on the classification of surrounding rock verified in railway passenger dedicated line in recent years， a set of scientific and reasonable and quick and practical method of multi - factor comprehensive index of the surrounding rock classification was studied，which could provide basis for survey and design and disaster prevention of railway tunnel in passenger dedicated line. Research conclusions ：( 1) The index system of tunnel surrounding rock classification of railway passenger dedicated line was put forward in this paper. (2)The more suitable method for surrounding rock classification of railway tunnel is BQ method，but this method should be revised when the tunnel excavation with larger area. (3 ) The paper also put forward correction suggestions based on the stability of surrounding rock， and the BQ method was improved. (4) At last，the method of multi - factor comprehensive index of the surrounding rock classification was put forward，which could realize result of tunnel surrounding rock classification quickly or effectively in the railway passenger dedicated line.
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Received: 20 November 2015
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2016, Vol. 33 
