What are the grouting methods commonly used for grouting pumps

Grouting pump grouting generally uses successive grouting method, intermittent grouting method, string hole grouting method, and joint grouting method.

1. Successive grouting is continuously grouting from beginning to end until it reaches the purpose of grouting. This grouting method is suitable for grouting when the grouting layer or the fracture gap is small, the water absorption capacity of the drill hole is small, and the slurry consumption is not large.

2. Intermittent grouting method, when the grouting channel is large, and the drilling unit consumes large amount of slurry, intermittent grouting method may be adopted. The length of the grouting period depends on the time required for the slurry to reach the initial setting, and the number of intermittent times is the orifice pressure. The rate of increase depends on the speed.

3. String hole grouting method, string hole grouting method is grouting in series with the two holes, this grouting method is suitable for the grouting process in the adjacent hole smash situation, grouting according to the hole water level bump, can be Inject water into the downstream grouting hole and then grouting in the upstream grouting hole.