지하 공간 - 연약 지반 솔루션

1.Industry Pain Points & Challenges

지하 공학 및 심층 기초 굴착 공사에서 수압과 지질 조건은 주요한 숨겨진 위험 요소입니다.

(1) 지하수 용출 및 누수: 높은 지하수위는 지하실 바닥에 엄청난 부력을 가하여 심각한 습기 및 누수 문제를 야기합니다.

(2) 불균등 침하 위험: 연약한 실트질 토양 기초 위에 건설하면 구조물이 쉽게 기울어지거나 균열이 생길 수 있습니다.

(3) Traditional drainage systems are prone to clogging: Traditional blind drains have poor filtration performance; once silt enters, they quickly become ineffective, resulting in poor drainage.

-Difficulty in protecting the structural waterproofing layer: Crushed stones in the backfill soil can easily tear the waterproofing layer during mechanical construction.

2.System Solution Changfeng’s comprehensive solution, “Deep Constraint + Multi-dimensional Drainage,” includes:

(1) Deep Foundation Reinforcement: Geocells are used to form a “raft” foundation in weak soil, transforming dispersed soil into a stable rigid platform through lateral constraint.

(2) Building Exterior Wall/Floor Drainage: Capillary drainage plates or water-storage boards are laid to rapidly dissipate groundwater pressure through physical gaps.

(3) High-efficiency underground space drainage matrix: A permanent, rapid water-drainage network is constructed in the underground space using plastic blind drains and rigid permeable pipes.

(4) Foundation Waterproofing Protection: Sodium bentonite waterproofing blankets (GCL) are used to provide a water-swellable, “self-healing” waterproof layer, serving as the core barrier of the structure.

3. 핵심 장점

(1) 40% Increase in Foundation Bearing Capacity: Geocells significantly increase the effective modulus of weak soil layers, reducing building cracking caused by settlement.

(2) Zero Water Accumulation and Drainage Efficiency: The capillary drainage structure combined with plastic blind drains achieves drainage speeds 3 times faster than traditional gravel blind drains, without scaling or clogging.

(3) Easy Installation: Compared to concrete support, the geosynthetic solution improves construction efficiency by over 50%, greatly shortening the exposure time of deep foundation pits.

4. 사례 연구 및 관련 제품

Typical Case: Jakarta Metro Foundation Pit Reinforcement and Underground Utility Tunnel Drainage Project, Indonesia.