Our goal is to evaluate common practice and promote the exchange of ideas. In particular, young engineers are encouraged to develop and refine their engineering judgment.
The following task is based on an anchor test. As part of the construction of a run-of-river hydropower plant, an excavation support system is planned, consisting of a bored pile wall with tieback anchors. The grouted bodies of the anchors are embedded in a limestone layer.
To determine the external load-bearing resistance of the anchors, a preliminary testing campaign was carried out with three vertically installed test anchors. In accordance with the recommendation of standard SIA 267, the lowest test value among the three was used to determine the characteristic load-bearing capacity.
The objective of the task is to determine the characteristic external load-bearing resistance of the anchors, Ra,k. Data on the soil and rock properties, anchor dimensions, and execution conditions can be used to estimate this resistance. The participants’ answers will be compared with the test results, and the responses closest to the measured values will be recognized. Information regarding the anchor installation and hydrogeological conditions is provided on the following page.
The three participants with the best answers will receive a 3-year free membership in our GS Society. In addition, an iPad will be raffled among all participants.
Deadline for submitting answers to the Design Challenge: February 20, 2026.
We recommend that participants provide their contact details in the form so that we can get in touch with the winners.
