Tank foundation subsidence is a common but serious issue in industries such as oil refineries, petrochemical plants, chemical storage facilities, and energy terminals. If not properly addressed, uneven settlement can lead to tank deformation, leakage risks, operational downtime, and even safety hazards.
This guide provides a clear, step-by-step overview of tank foundation subsidence improvement and ground reinforcement, while highlighting how engineered solutions from Hengxiang Hongye are applied in oil refinery and large-scale industrial tank projects.
Understanding Tank Foundation Subsidence
Tank foundation subsidence occurs when the soil beneath a storage tank loses bearing capacity or consolidates unevenly over time. Common causes include:
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Weak or compressible soil layers
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Inadequate foundation design
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Long-term static loading from large tanks
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Groundwater level changes
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Poor drainage or erosion
In oil refineries and similar facilities, where tanks store heavy liquids over long periods, foundation stability is critical for structural integrity and operational safety.
Step 1: Site Investigation and Subsidence Assessment
The first and most critical step is a comprehensive site investigation. This typically includes:
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Geotechnical soil testing
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Settlement monitoring and level surveys
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Evaluation of existing foundation structures
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Load analysis of the tank (empty and full conditions)
Accurate assessment helps determine the extent of subsidence, its causes, and whether immediate reinforcement is required.
Step 2: Selecting the Appropriate Ground Reinforcement Method
Once subsidence conditions are identified, engineers select reinforcement methods based on soil type, tank size, and operational constraints. Common improvement techniques include:
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Soil replacement or compaction
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Grouting (cement or chemical grouting)
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Pile or micropile reinforcement
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Geosynthetic-based ground reinforcement
For large oil storage tanks and refinery applications, geosynthetic solutions are widely used due to their efficiency, durability, and minimal disruption to operations.
Step 3: Ground Preparation and Load Redistribution
Before reinforcement installation, the ground must be properly prepared:
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Removal of weak or loose soil layers if necessary
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Surface leveling and compaction
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Installation of drainage systems to control moisture
