Grouting device for road and bridge construction and grouting method thereof

The invention discloses a grouting device for road and bridge construction and a grouting method thereof, and relates to the technical field of grouting device.The grouting device comprises a shell and a hole and further comprises a grout spraying assembly used for spraying grout to the hole, a second opening allowing a rotating part of a first motor to penetrate through is formed in the surface of a transmission shell, and the rotating part of the first motor is fixedly connected with a threaded rod; the surface of the threaded rod is in threaded connection with a sleeve block, the surface of the rotating shaft is in fixed-axis rotating connection with the inner wall of the shell, the rotating shaft is connected with the guniting assembly through a connecting part, and a moving part capable of driving the guniting assembly to vertically move is arranged on the surface of the mounting frame. According to the device, free switching can be conducted in fixed jet grouting, swing jet grouting and rotary jet grout