Research on the application of mechanized drilling technology for connecting passage in urban region railway
Due to the long tunnels and large spacing between railways tracks in Shanghai urban region railway lines,there are many connecting passages with long lengths and deep burial depths.Traditional freezing methods have high construction risks and long construction periods due to many of them are located in confined water system.The connecting passage construction technology based on mechanized drilling is a rapidly developing new construction technology of connecting passages in recent years.It has been widely promoted in metro shield tunnels,but has not yet been applied in urban region railways.By studying the technical characteristics and engineering application of mechanized drilling technology,this paper analyzes the possibility of using mechanized drilling in urban region railways from the perspectives of geological adaptability and construction clearance.The critical technical issues faced in using mechanized drilling for connecting passage construction in urban region railways are proposed,and a synchronized construction plan for the main tunnel and connecting passage is proposed based on the characteristics of shield tunnels in urban region railways,in order to provide reference for the application of this technology in urban region railways.
urban region railwaymechanized drillingconnecting passagestructural designsynchronized construction
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