ZOOMLION
ZDG550C Diaphragm Wall Grab

ZDG550C Diaphragm Wall Grab

ZOOMLION ZDG550C hydraulic diaphragm wall grab handles deep trench excavation in complex soil conditions, underground engineering projects, and other applications involving the construction of underground diaphragm walls. The piling machinery has a maximum trench depth of 80 m and a trench width of up to 1.2 m. Built for demanding underground foundation engineering, this heavy-duty foundation machine cuts into soil layers, grips excavated material and removes it from the trench to support diaphragm wall construction. It addresses this with a 12-push-plate alignment correction system that adjusts the grab's position during trenching. A bucket capacity of 1–2 m³ provides strong soil-cutting and excavation capabilities, and the modular counterweights allow the working mechanism's weight to be adjusted for different ground conditions. Suitable for deep excavations, underground structures and other diaphragm wall projects, ZDG550C offers the stability, excavation capacity and operational control required of heavy construction machinery working in challenging subsurface environments.

  • Max. Line Pull: 600 kN
  • Max. Groove Width: 1.2 m
  • Max. Groove Depth: 80 m
  • Max. Operation Radius: 5,350 mm
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Advantages
  • Precise Trench Alignment: A 12 push plate alignment correction system allows for the grab to be corrected in position and attitude at the time of the cut, which improves the accuracy of the excavation at greater depths.
  • Strong Soil-Cutting Performance: A closing force of 1,700 kN and a large-capacity grab bucket improve soil penetration during excavation and increase the volume of material removed.
  • Adaptability to Different Ground Conditions: Modular counterweights enable the weight of the grab to be varied according to the strata, giving greater flexibility when digging through different types of ground.
  • Stable Hoisting Operation: A bottom-mounted single rope dual winch improves the stability of grab hoisting and also reduces wire rope wear during the repeated excavation cycles.
  • Heavy-Duty Structural Stability: A high rigidity mast and heavy duty slewing bearing provide the machine with the required stability for deep trench excavation and high load operations.
  • Operational Reliability and Hydraulic Safety: Depth adaptive drum tracking and hydraulic leakage monitoring enables reliable operation at greater excavation depths and provides additional protection for the hydraulic system.
Technical Specifications
Operating
Max. hoisting force kN 600
Max. hoisting / lowering speed m/min 40/70
Max. trench width m 1.2
Trench depth m 80
Max. working radius mm 5350
Main Winch
Line pull kN 2 × 300
Max. line speed m/min 80
Wire rope diameter mm 32
Grab
Grab width (customizable) m 0.6/0.8/1/1.2
Trench length m 2.8
Max. attachment weight t 31.5
Grab capacity m3 1–2
Attachment length m 9.8
Main cylinder thrust force kN 1473(30Mpa)
Grab opening / closing time s 6–7
Attachment rotation, ±180° ° Optional
Frame thickness mm 560
Engine
Engine model - QSM11-C400
Rated engine power / speed kW/rpm 298/1800
Engine displacement L 11
Engine emission standard - China III
Undercarriage
Crawler ground contact length mm 5159
Track shoe width mm 800
Undercarriage extended / retracted width mm 4780/3430
Tractive force kN 720
Machine
Dimensions (L × W × H) mm 9900 × 6164 × 17786 (working position)
mm 14957 × 3430 × 3394 (transport position)
Mast structure - Box-section mast
Tail swing radius mm 4550
Operating weight t 120
Grab Specifications
Base grab body Standard counterweight blocks and total weight
Square grab head
Width (mm) Weight (t) Trench width (mm) Number of counterweight blocks Total weight (t)
600 26.1 600 4 25.2
800 4 28
1000 4 30.2
1200 4 31.5
400 (optional) 16.1 400 0 17.5
450 0 18.9
500 0 19.1

Note: Each counterweight block weighs 475 kg. The 600 mm base grab body can be equipped with up to 8 counterweight blocks (4 blocks as standard); the 400 mm base grab body cannot be equipped with any counterweight blocks.

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