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 (4850-2) stresses in shotcrete tunnel linings.

Datasheet

Brand	Geokon
Standard Ranges¹	4850-1, 7.5, 20, 35 MPa 4850-2, 2, 3, 5 MPa
Resolution	0.025% F.S.
Accuracy²	±0.1% F.S.
Temperature Range¹	−20°C to +80°C

Brand

Geokon

Standard Ranges¹

4850-1, 7.5, 20, 35 MPa
4850-2, 2, 3, 5 MPa

Resolution

0.025% F.S.

Accuracy²

±0.1% F.S.

Temperature Range¹

−20°C to +80°C

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.

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