过江通道大直径盾构带压进仓查/换刀技术

Cutter Inspection/Replacement in Cabin with Pressure for River Channel Construction by Large Diameter Shield

摘要:

大直径气垫式泥水平衡盾构机在不同地质条件长距离掘进中，都会对盾构机刀具产生不同程度的磨损，尤其在砂卵石为主的地层、石英含量超高岩层及上软下硬地层，盾构机刀盘、刀具更易磨损。为保证盾构机刀盘使用安全，需经常带压进仓进行刀具检查，对边滚刀、中心滚刀按不同磨耗标准进行更换。通过某过江通道带压进仓查/换刀工程实例，对大直径盾构带压进仓查/换刀施工工艺和方法进行总结。

Abstract:

In long distance tunneling with large diameter air cushion slurry balance shield machine under different geological conditions, different degrees of wear on shield machine cutter will be produced; especially in sand and gravel based formation, the formation with excessive level of quartz and soft & hard formation, the cutter head and cutter are more easy to be worn. In order to ensure the safe use of shield machine cutter head, inspection and replacement of edge cutter and center cutter often should be done according to the different wear standards in the cabin with pressure. With an engineering case of cutter inspection/replacement in cabin with pressure for river channel construction, the paper summed up the construction technology of cutter inspection/replacement in cabin with pressure for large diameter shield.