Backfilling for hollow and narrow spaces

Lightweight soil is pumped using high-pressure hoses, free from the spatial constraints of the pouring point, offering high fluidity during pouring. After pouring, it can solidify without the need for mechanical compaction or vibration, advantages that allow for easy backfilling of special voids. This achieves a simple construction process with dense backfilling, providing a new technical approach to solving the challenge of void backfilling.

Low modulus of elasticity in light soil, excellent energy absorption properties, applicable to the reserved deformation layer of tunnels, can counteract the creep deformation force of underground engineering, offering excellent cushioning characteristics to the structure, preventing seismic damage to the structure.

Applicable projects include backfilling for abandoned pipelines, new pipeline tunnels, and tunnel ceiling lining spaces.

In construction projects, most involve backfilling of excavation pits due to the presence of basements. Common materials for backfilling include construction debris or soil. With the popularity of energy-saving and environmental protection, as well as the promotion of new technologies, many are gradually adopting foam concrete for backfilling.