English：

Taking a subway project in Xiamen as the engineering background, aiming at the problems oflarge vibration disturbance, poor stratum stability, high permeability coefficient, and seriousenvironmental pollution in the construction of shield connecting passage under the composite stratum ofcoastal reclamation area and hard rock, a key technology of green construction based on the wire sawmethod is proposed. Through theoretical analysis and engineering practice, the techniques of full⁃sectionhard rock static cutting and environment⁃friendly process integration, etc. , are systematically studied. Byoptimizing the cutting parameters of the diamond wire saw and combining with the static crushing agent⁃assisted block removal process, the low⁃disturbance wire saw cutting technology was formed. Comparedwith the traditional processes such as the blasting method and water drilling method, the constructionperiod has been shortened by 20% to 30%, the comprehensive cost has been reduced by 18%, and thesurface settlement has been controlled within 3mm. This research provides an efficient, low⁃carbon, andsafe new scheme for the construction of complex stratum connection channels in coastal reclamation areas.