Municipal Soft Soil Subgrade New Road Project
Municipal Soft Soil Subgrade New Road Project
1. Project Overview
New municipal trunk road in Jiangsu coastal city, total length 5.8km. The whole line is coastal mucky soft soil, low bearing capacity, large compression deformation; traditional deep soil replacement would generate massive waste soil and delay construction period.
2. Geotextile Application Details
Material: 500g/m² high-strength filament reinforcing geotextile
Scheme: Single layer geotextile laid on cleared subgrade surface, covered with 25cm gravel filling layer
Construction control: No excessive tension during laying, reserved shrinkage allowance; layered compaction with light roller first
3. Core Functions Played
Load dispersion: Improve overall bearing capacity of soft foundation
Accelerate consolidation: Drain pore water of soft soil to shorten foundation stabilization time
Anti-puncture: Buffer sharp gravel to avoid fabric tearing
4. Acceptance & Operation Effect
Subgrade bearing capacity increased from 55kPa to 110kPa, meeting highway design standard
Total settlement reduced by 42% compared with pure filling scheme
Construction period shortened by 22 days, reduce waste soil transportation and disposal cost
