Taking the Lishui River Basin treatment project in Foshan,Guangdong as the background,this paper solves the key problems of water supply pressure pipeline crossing expressway,studies and puts forward three crossing positions and two crossing schemes.Through the comparative analysis of technology,economy and implementation difficulty,the scheme of using the existing DN1000 reinforced concrete crossing pipeline as the casing for crossing has the advantages of technical feasibility,economic savings,small implementation difficulty,subgrade bearing capacity and settlement meeting the requirements,and will not affect the existing road.Detailed process design shall be carried out for pressure pipeline crossing at the construction stage.At present,the pressure pipeline has been implemented and operated in good condition without affecting road facilities.
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