In shield construction,gantry cranes are commonly used for vertical transportation.The foundations of the gan-try crane track beams usually apply to the diaphragm walls of the main structures.The auxiliary and main structure of the sta-tion construction project can be connected together only after the removal of diaphragm walls.When the shield and the auxilia-ry structure of the station are being constructed at the same time,how to ensure the safety of the gantry cranes while removing the diaphragm walls between the auxiliary and the main structure is a difficult task.In view of the above,based on the re-search and successful implementation of the large-span diaphragm wall chiseling in the auxiliary structure of Baoying Dadao Station in Guangzhou Metro Line 5,the key technologies of removing large-span diaphragm walls under heavy load conditions are summarized,which consists of setting floor braces,lattice column replacement,section removal of diaphragm walls,track beam settlement monitoring,floor post-casting construction etc.,providing references for the design and construc-tion of similar projects.
关键词
重载条件/地下连续墙凿除/大跨度/格构柱换撑/轨道梁
Key words
heavy load condition/the removal of diaphragm walls/large-span/lattice column replacement/track beam
维普
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