When planning a plant shutdown, the focus is usually on the mechanical aspects. However, there’s a crucial preliminary question for project managers and civil inspectors: Is the ground prepared to support heavy-duty cranes?
An error in ground preparation can lead to catastrophic failures due to settlement or overturning. Here are the essential civil works to safeguard your operation.
Access Routes or Mud Traps? Ensuring Heavy Traffic
The challenge begins at the plant entrance. High-capacity cranes and their counterweights require temporary, high-strength access roads:
Road Stabilization: Replacement of soft soil with compacted granular material (base and sub-base).
Road Geometry: Widening of curves and smoothing of slopes to prevent convoys from getting stuck.
Temporary Drainage: Water diversion channels to prevent rainwater from saturating and weakening the roads.
Stable Platform or Risk of Overturning? The Physics of Soil
When lifting a critical load, the crane transfers enormous pressures through its outriggers. If the ground settles by even millimeters, the center of gravity shifts completely:
Compaction to the Limit: Leveled and compacted platforms to densities exceeding 95% of the Modified Proctor density.
Actual Load Capacity: On-site tests (such as plate load tests) to determine the exact kg/cm² the soil can support.
Transition Slabs: Construction of temporary concrete bases to distribute the weight and protect underground pipes or utilities.
Inspection Criteria: In critical lifts, the safety of the mechanical maneuver is directly proportional to the rigidity of the supporting civil works.
The Civil and Mechanical Ally at the Work Site
Don’t leave the stability of your project to chance. At A&J Special Maintenance Services, we combine industrial maintenance with civil engineering support and earthmoving. From platform preparation to field testing, we ensure your heavy-duty projects get off to a 100% solid and safe start.