Espacio subterráneo 8; Soluciones de cimentación blanda

1.Industry Pain Points & Challenges

En la ingeniería subterránea y la construcción de pozos de cimentación profundos, la presión del agua y las condiciones geológicas son los principales peligros ocultos:

(1) Surgencia y filtración de agua subterránea: Los altos niveles de agua subterránea ejercen una enorme flotabilidad sobre los pisos de los sótanos, lo que provoca graves problemas de humedad y filtraciones.

(2) Riesgo de asentamiento desigual: La construcción sobre cimientos de suelo limoso blando puede provocar fácilmente que la estructura se incline o se agriete.

(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. Ventajas principales

(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. Estudios de caso y productos relacionados

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