Key Technologies of Removing Large-span Diaphragm Walls Under Heavy Load Conditions
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.
heavy load conditionthe removal of diaphragm wallslarge-spanlattice column replacementtrack beam
万方数据
维普
