According to the actual situation of Tanshuwan tunnel,the excavation sequence and support scheme of shallow-buried offset tunnel are studied,mainly introducing the construction technologies of tunnel entrance inverted arch,long pipe roof,advance ductule,and steel arch frame.In addition,the cover arch construction measure is also the key,which supports the tunnel structure by forming an integral arch frame with multiple steel rings,thereby improving the stability and durability of the tunnel.Engineering practice has proved that the tunnel entering construction technology has achieved good results.
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