This page explains how Diaphragm Wall Grab is classified within Repair and Installation of Machinery and Equipment. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.
A specialized excavation tool used for constructing diaphragm walls in geotechnical engineering.
Technical details and manufacturing context for Diaphragm Wall Grab
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Excavation WidthRequired | 600–1500 meters | Maximum width of trench that can be excavated |
| Excavation DepthRequired | 50–120 meters | Maximum depth capability for trench excavation |
| Operating WeightRequired | 15–45 tons | Total weight of the grab assembly during operation |
| Bucket CapacityRequired | 0.8–3.5 cubic meters | Volume of material captured per grab cycle |
| Closing ForceRequired | 200–600 kN | Maximum force applied when closing the jaws |
| Operating Pressure | 25–35 MPa | Hydraulic system pressure; below 25 MPa reduces closing force. |
| Max Pull Force | 100–300 kN | Vertical pull on the grab; must match crane capacity. |
| Opening Width | 2200–4500 mm | Maximum opening of the grab jaws. |
| Cylinder Stroke | 500–1200 mm | Determines closing speed and force. |
| Operating Temperature | -20–50 °C | Outside this range, hydraulic fluid viscosity changes. |
| Material Grade | Q345B | High-strength steel for wear resistance.GB/T 1591 |
| Hydraulic Oil Flow | 150–300 L/min | Required flow for optimal closing speed. |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
Commonly used trade names and technical identifiers for Diaphragm Wall Grab.
| pressure: | Up to 350 bar (hydraulic system maximum working pressure) |
| flow rate: | 80-250 L/min (hydraulic oil flow range for optimal grab operation) |
| temperature: | -10°C to 50°C (operational range for hydraulic systems and structural steel) |
| slurry concentration: | Up to 1.35 specific gravity (maximum bentonite slurry density for effective excavation) |
Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.
Quoted from the published standard.
7 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.
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A practical evidence checklist for RFQ preparation and supplier evaluation.
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It is used to excavate deep, vertical trenches for constructing diaphragm walls, which serve as retaining walls, cut-off walls, or foundation elements in civil engineering projects.
Key parameters include excavation width, depth, operating weight, bucket capacity, closing force, operating pressure, max pull force, opening width, cylinder stroke, operating temperature, material grade, and hydraulic oil flow. These must match the project requirements and crane capacity.
The grab is lowered with jaws open, then the jaws close under hydraulic or mechanical force to capture soil or rock. The filled grab is lifted and discharged, and the cycle repeats to excavate the trench.
Signs include excessive wear on cutting teeth, hydraulic fluid leaks, reduced closing force, or unusual noises. Regular inspection and adherence to operating parameters are essential.
Editorial classification, named public sources where available, and source-reviewed manufacturer records.
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