عنوان مقاله [English]
In most constructional structures, especially underground structures, excavations at high depths are required. In areas of city and special places due to work space constraints, it is not possible to carry out an authorized slope. Therefore, for the execution of such structures, there is a need for vertical excavations. For this purpose, flexible walls are used which are the criterion of the present research. In the present research, after testing the laboratory, it is necessary to perform validation tests in order to ensure that the tests are carried out and after the adaptation of the results to the experiments are carried out. In this study, 12 experiments are based on static studies in situations where the walls have different thicknesses of 1, 1.5 and 3 mm, as well as different grips of 40 and 120 mm, and the number of rows of different lateral restraints. The results of this research show that with increasing wall thickness from 1 mm to 3 mm, which has a three-fold increase in thickness, in the discussion of the lateral displacement of the wall, something about 2.4% decrease in the lateral displacement of the thickness 1 mm to 3 mm. By comparing the walls with different grips, the best performance is related to the wall, which has more grip and number of bars, and more wall thickness. The greater the wall thickness, the rigidity and hardness of the wall, and the lateral wall change is reduced.