Construction Technology of Honeycomb Geocell for Subgrade Reinforcement

Construction Technology of Honeycomb Geocell for Subgrade Reinforcement

1. Level and Compact Original Subgrade

Clean up sundries, soft mud and loose soil on the foundation surface, level the ground and roll it to reach the design compaction standard. Lay a layer of non-woven geotextile as isolation layer to prevent mutual mixing of subgrade soil and aggregate.

2. Unfold and Fix Honeycomb Geocell

Spread the folded geocell fully to form a complete honeycomb mesh. Fix the edge and middle parts with U-shaped steel ground nails to keep the cells stretched tightly without shrinkage or distortion. Adjacent geocell panels should be overlapped and anchored firmly.

3. Layered Filling and Compaction

Fill graded crushed stone or sand aggregate into each cell cavity by layers. Each filling layer shall not exceed the height of the geocell. After each filling, use road rollers for full compaction until meeting compaction requirements. Avoid excessive impact rolling that may damage welding joints.

4. Pave Upper Structural Layers

After the geocell reinforced cushion is formed stably, pave the cement stabilized base course, then lay asphalt or concrete surface course according to road design standards.

5. Inspection and Acceptance

Check the flatness, thickness, compaction degree of the reinforced layer and the integrity of geocell sheets; record all data for project acceptance.