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NATM Style Shotcrete Stress VW Model 4850

NATM Style Shotcrete Stress VW Model 4850

The Model 4850 NATM Style Shotcrete Stress Cells*are designed for the measurement of tangential (4850-1) and radial (4

Description

The Model 4850 NATM Style Shotcrete Stress Cells*are designed for the measurement of tangential (4850-1) and radial (4850-2) stresses in shotcrete tunnel linings. The cells consist of two rectangular steel plates welded together around the periphery with a de-aired fluid occupying the space between the plates. A short tube connects the cell to a vibrating wire pressure transducer. A prestressing tube is provided for expanding the cell after the concrete has cured. Cells of this type are also used for measurements of stress in mass concrete.

Spesification

Standard Ranges¹ 4850-1 | 7.5, 20, 35 MPa
4850-2 | 2, 3, 5 MPa
Over Range
150% F.S.
Resolution
0.025% F.S.
Accuracy²
±0.1% F.S.
Temperature Range¹
−20°C to +80°C
L × W × H¹
4850-1 | 200 × 100 × 6 mm
4850-2 | 250 × 150 × 6 mm