1. Change the geology. In the construction, geological loose is formed due to various reasons, and the engineering cannot be carried out.

2. Fast trapping. While mines, coal mines, simultaneous groundwater will appear.
3. Stick the plug. In the bridge construction, there will be empty layers in the pile grout. This is piloted at this time.
4. Patch cracks. Dam, traffic highway roadbed foundation, cracking, calendering, need to repair cracks to improve reinforcement. The cement slurry machine with relative parameters and flow is selected based on the construction requirements.

5. Back to the empty layer. Due to natural and human problems, large empty hollow holes will appear under the subtenter. Causes safety hazards. Select the traffic and high pressure. Large grouting machine. Such as three cylinders, double cylinder mortar pumps. Fast and high pressure backfillet surface.