STUDY ON SUPERLONG DISTANCE OVERLAPPING OF INTEGRATED PIPE CORRIDORS THROUGH EXISTING TUNNELS IN COMPLEX STRATA
With the continuous development of urban rail transit engineering,more and more underground tunnels are facing the problem of crossing existing tunnels during the construction process.This study relies on the successful case of Shenzhen urban rail transit line 16 project's co construction of a pipe gallery comprehensive well,a receiving well,and a shield tunnel section crossing the existing tunnel of metro line 16 for an ultra long distance under complex geological conditions,from the setting of excavation parameters in different strata,the use of thick slurry.This study comprehensively elaborates on the key control points of shield tunneling through existing tunnels in terms of pressurized opening,selection of cutting tools for different strata,and other technical auxiliary measures,which has important reference and reference significance for similar shield tunneling projects.
ultra long distanceshield tunnelingexisting tunnels
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