Receiving Technology of Shield Shelling Disintegration in Underground Excavation Station
Shield method has fast construction speed and high safety,which has become the main means of urban subway construction.However,the complex ground environment in urban areas generally can not provide receiving conditions for shield tunnel.Therefore,shield disintegrating and receiving in stations or caves are often adopted,and the space inside dug stations is closed and the construction is limited.The receiving technology of shield hulling and disintegrating in dug station is studied.It is proposed that when determining the disintegrating receiving shield,the sinking section and middle plate hoisting holes should be planned in station construction stage,and grouting reinforcement should be done in advance at the station middle plate structure above the tunnel door to prevent the grouting dead angle.The length of the sinking section should be set as 0.5～1 times of the shield length.The cavern disintegration scheme is better than the station disintegration scheme.Through the scheme comparison,it is proposed that part of the shield tail in the hole is better than all of the shield tail out or all of the retention.
subway stationsshieldsdismantlingdisintegration in stationunderground
NETL
NSTL
万方数据
维普
