Abstract
This chapter is special in that, during the various test sites, it was possible to test horizontal tie rods accessible at both extremities. The results obtained demonstrate the reliability of the method. Results are analyzed for two test sites.
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Embankments contained by two tensioned retaining walls are an opportunity to control our measurements. Tests are performed at both ends of the tie rods and the results are compared (Fig. 7.1).
The dynamic stiffness is calculated from the eight mechanical impedance tests performed on the tie rod head.
First case
The values for the forces are as follows, 8.7 tons and 8.6 tons, i.e. 0.1-ton difference.
Second case
The force values are 6.9 tons and 7.1 tons or 0.2ton difference.
The measurement uncertainty is less than 0.2 ton.
On another site, tests were performed with the following results.
The characteristic of the tie rods being formed by a central plate and two bars, 16 acquisitions were performed, 8 on the left bar, 8 on the right bar. Each of these acquisitions results in a dynamic stiffness value.
T1 | Left | 3,67E + 08 | 8,4t | Right | 3,86E + 08 | 8,7t |
---|---|---|---|---|---|---|
T2 | Left | 4,43E + 08 | 4,43t | Right | 4,40E + 08 | 4,40t |
T3 | Left | 5,04E + 08 | 10,3t | Right | 4,82E + 08 | 10,0t |
The differentials of the internal force values are: 0.3 ton—0 ton and 0.3 ton.
Five tests were performed on horizontal ties the difference between the calculated forces on both sides of the tie backfill is less than 0.5 ton (Fig. 7.4).
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Rincent, JJ.H. (2024). Horizontal Anchors. In: Ground Anchors. Springer, Singapore. https://doi.org/10.1007/978-981-97-4414-5_7
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DOI: https://doi.org/10.1007/978-981-97-4414-5_7
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