ABSTRACT
For the three models that use aluminum rods, the tests were carried out at 1 g. Numerical modelling was also carried out to compare with the results of the 1 g tests.
The sand model at 1 g was prepared by compaction of the sand using a plate vibrator. The compaction could have created locked-in compaction stresses on the model braced wall and the adjacent tunnel thus influencing the model test results. This was not discussed in the paper.
