This article introduces the construction technology of PBA undercover excavation under the existing second ring municipal tunnel and elevated bridge at Guanghuacun station of Chengdu metro line 13.The key techniques of PBA method are analyzed and summarized,with a focus on the construction steps of PBA four guide tunnel undercover excavation in sand and gravel formations,and provides reference for the construction of municipal tunnels and elevated bridges under the rich water sand and gravel strata of similar urban subways.
关键词
成都地铁/富水砂卵石地层/PBA暗挖/施工技术
Key words
Chengdu metro/rich water sand and gravel strata/PBA undercover excavation/construction technique
维普
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