The invention provides a method for cleaning a framing concave joint of an underground diaphragm wall, which belongs to the technical field of underground diaphragm wall cleaning and comprises the following steps: construction preparation: preparing materials and manufacturing a groove cleaner
pile hammer; the
punching type
pile driver is in place, specifically, a
winch punching type
pile driver is installed, and the
pile driver and a cleaning pile hammer are kept perpendicular;
slurry is prepared, the height and concentration of wall protection
slurry of original groove grabbing construction in the construction groove section are kept, the
slurry concentration needs to be checked in the construction process, meanwhile, the slurry height is checked, and adjustment is conducted in time if changes exist;
punching a groove by a pile hammer of a punching
pile driver, wherein the pile hammer of the
winch punching type
pile driver is used for impacting and removing large soil, sand bags and concrete slurry leakage blocks in the groove of the wall body joint; a pile hammer of the punching pile
machine is replaced with the pile hammer of the groove cleaner for joint cleaning; and groove cleaning is conducted, specifically, after joint cleaning and brushing work is completed, final groove cleaning is conducted on the underground diaphragm wall formed groove. According to the method, the punching pile
machine pile hammer is firstly adopted for
impact cleaning, then the groove cleaning device pile hammer is utilized for
impact cleaning, through repeated cross operation, the purpose of cleaning up the joint groove is achieved, and the wall
framing construction connection quality is guaranteed.