Abstract
Calculating the diameter of the element under test is one of the elements to check before redoing a tie-rod dimensioning calculation. Two examples are given.
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See Fig. 6.1.
First example of calculations from in situ tests (Fig. 6.2).
The formula of the NF standard P94 160–4.
6.1 V/F = 1 / ρb V B a
Concrete volume mass ρb in kg/m3.
Circular cross section (m2).
Mobility 1,5 10–6 m/sN.
Concrete bulk mass—hypothetical 2500 kg/m3.
Wave velocity inside the tie, hypothesis 4500m/s.
Right section of the reinforcement A.
A = 0,06m2
D = 0,27m.
See Fig. 6.3.
Second example (Fig. 6.4).
Mobility 4,46 10–5 m/sN.
Volumetric mass of concrete and bar 2500 kg/m3.
Wave celerity inside the tie rod 4500m/s.
A = 2 E-3 m2
This result is normal, because these bars are sealed in the rock.
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Rincent, JJ.H. (2024). Diameter of the Tie-Rod with Its Cement Grout. In: Ground Anchors. Springer, Singapore. https://doi.org/10.1007/978-981-97-4414-5_6
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DOI: https://doi.org/10.1007/978-981-97-4414-5_6
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