Research and Application of Full-Face Pipe Jacking Method in Saturated Soft Soil Layers for the Jing'an Temple Station Subway Project
The Jing'an Temple Station of Shanghai Metro Line 14 is a project where the main structure of the sub-way station is constructed using the large-section rectangular pipe jacking method.To address the conflicts between underground construction,geological environment,and surrounding buildings in the main structure works of Jing'an Temple Station,this paper proposes a method suitable for the construction of subway stations in saturated soft soil layers in central urban areas using full-face pipe jacking method.Innovatively,the method introduces deep overbur-den tunnel portal water-stop technology,deep-buried pipe segment selfcompensating anti-retreat technology,soil improvement pipe segment friction reduction-slurry solidification technology,steelconcrete composite pipe jacking segment structure,composite segment steel shell assembly and hoisting technology,and composite segment inner lining casting technology.These innovations overcome engineering challenges such as deep overburden close-spacing pipe jacking advancement and construction of ultra-large section pipe jacking segments in subway station construc-tion,achieving good implementation results and providing references for subway construction in similar strata.
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