Anti-blocking device for drain hole of soil nailing wall

A soil nailing wall drain hole anti-blocking device comprises a soil nailing wall drain pipe arranged on a soil nailing wall base, a mounting column is inserted into the outer end of the soil nailing wall drain pipe, the mounting column is sleeved with a layer of plastic film, an inner threaded hole is formed in the mounting column, and an inner wedge block is slidably mounted on the portion, located on the soil nailing wall drain pipe, of the mounting column. An elastic body is installed outside the inner wedge block, an outer extrusion plate is installed outside the elastic body, a threaded rod is inserted into the inner threaded hole in an engaged mode, and a pull ring is installed at the outer end of the threaded rod. According to the device, concrete can be prevented from being poured into the drain hole of the soil nailing wall, and when the device is used next time, the mounting column is sleeved with a layer of plastic film, so that the economical efficiency of the device is improved, and the device i