Rope suspended hydraulic grab technology is a widely established solution for diaphragm wall construction, particularly suited for deep excavation works in soft to medium-hard soils. The grab is suspended by ropes from a diaphragm wall rig or duty-cycle crane and operates hydraulically to excavate soil by opening and closing its jaws.
The excavation process is performed under the support of stabilising slurry, typically bentonite or polymer, which maintains trench stability and prevents collapse of the excavation walls. The rope suspended configuration allows reliable excavation performance with flexible operation and efficient panel excavation cycles.
This technology is commonly used for civil engineering and infrastructure projects requiring diaphragm walls for structural support, groundwater cut-off, or underground construction activities.
- Typical applications include:
- Basement and underground structures
- Metro and underground transport systems
- Retaining walls for deep excavations
- Cut-off walls for groundwater control
- Urban infrastructure and foundation projects
