Abstract：Research purposes：With more and more cities taking subway as the most effective means of solving the traffic jam, more and more vertical and cross lines in subway tunnels are constructed, and it brings more risks and challenges to the tunnel construction. This paper researches the key points , the difficult points and the measures to be taken for vertical and cross construction so as to provide the reference to the subway tunnel construction.
Research conclusions：The advanced forecast, blasting control, monitoring and measurement are essential to the construction of vertical and cross tunnel, and they are supplementary to each other and not one of them can be dispensed with. To construction of vertical and cross tunnel, the blasting control is key point and the advanced forecast, monitoring and measurement are also important. Only when the real geological condition of the working face is well known through the advanced forecast and the change o f the ground subsidence is well known through them on itored and measured data can the most reasonable and effective blasting control parameters be worked out, the potential risk be eliminated and the smooth construction of vertical and cross tunnel be ensured.
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2010, Vol. 27 
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