Temporary supporting device for grooving groove section of underground diaphragm wall

The invention relates to an underground diaphragm wall grooving groove section temporary supporting device which comprises supporting standard blocks of various specifications and rulers and middle supporting rod pieces, the supporting standard blocks are connected through standard block connecting steel plates to form whole supporting steel plates, and every two whole supporting steel plates are connected and assembled through the multiple middle supporting rod pieces to form the supporting device. Hoisting connectors are mounted at the upper ends of the supporting devices. The method can solve the problem that in the construction process of the underground diaphragm wall, construction needs to be stopped for a long time due to emergencies after grooving is finished, and the groove wall collapses possibly. The groove section is supported by the method, collapse of the groove section caused by long-time exposure is avoided, and loss caused by backfilling of the groove section and re-grooving can be avoided. 本