Cast-in-place foam concrete is a new type of engineering field material developed in recent years; it has the characteristics of light weight, good fluidity, strong durability, low cost and simple construction.

The purpose or aims of grouting includes: 1. Seepage control; 2. Water plugging, 3. The consolidation; 4. To prevent landslide; 5. To reduce surface subsidence; 6. Improve the foundation bearing capacity; 7. Backfill; 8. Reinforcement.