Temporary filling device for construction of underground diaphragm wall joint easy to sink

The utility model discloses an easy-to-sink temporary filling device for underground diaphragm wall joint construction in the technical field of geotechnical engineering, which comprises a bag body, the bag body comprises an outer bag and a cavity positioned in the outer bag, the bottom of the outer bag is provided with a counterweight filling port communicated with the cavity, the counterweight filling port is provided with a counterweight filling valve, and the counterweight filling valve is connected with the cavity. And the counterweight iron sand is filled into the outer bag from the counterweight filling opening to form a counterweight iron sand layer. The counterweight iron sand is additionally arranged at the bottom of the outer bag, so that the problems that an existing filling device is difficult to sink in the using process and the sinking effect is poor are solved, and the sinking effect and the sinking perpendicularity of the filling bag in the using process are improved. 本实用新型公开了岩土工程技术领域中的一种易于沉入