ﻣﻄﺎﻟﻌﻪ آزﻣﺎﯾﺸﮕﺎﻫﯽ رﻓﺘﺎر ﻣﯿﻞ ﻣﻬﺎرﻫﺎ در دﯾﻮارﻫﺎي ﺣﺎﯾﻞ اﻧﻌﻄﺎف ﭘﺬﯾﺮ

Experimental study of the behavior of pleasing inhibitors in flexible retaining walls

در اﺟﺮاي اﮐﺜﺮ ﺳﺎزهﻫﺎي ﻋﻤﺮاﻧﯽ ﺑﺨﺼﻮص زﯾﺮزﻣﯿﻨﯽ، ﺧﺎﮐﺒﺮداريﻫﺎﯾﯽ ﺑﺎ ﻋﻤﻖ زﯾﺎد ﻣﻮرد ﻧﯿﺎز اﺳﺖ. ﺑﻨﺎﺑﺮاﯾﻦ ﺑﺮاي اﺟﺮاي ﭼﻨﯿﻦ ﺳﺎزهﻫﺎﯾﯽ ﻧﯿﺎز ﺑﻪ ﮔﻮدﺑﺮداريﻫﺎﯾﯽ ﺑﺎ ﺷﯿﺐ ﻗﺎﺋﻢ ﻣﯽﺑﺎﺷﺪ. اﺳﺘﻔﺎده از دﯾﻮارﻫﺎي ﺣﺎﯾﻞ اﻧﻌﻄﺎف ﭘﺬﯾﺮ ﺑﻪ ﻋﻨﻮان ﯾﮑﯽ از راﻫﻬﺎي ﭘﺎﯾﺪار ﺳﺎزي ﮔﻮدﻫﺎي ﻗﺎﺋﻢ ﻣﯽﺑﺎﺷﺪ. در اﯾﻦ ﻣﻘﺎﻟﻪ ﺗﺎﺛﯿﺮ ﻣﯿﺰان اﻧﻌﻄﺎف ﭘﺬﯾﺮي و ﻋﻤﻖ ﮔﯿﺮداري دﯾﻮار و ﺗﻌﺪاد ﻣﯿﻞ ﻣﻬﺎر در دﯾﻮار ﺣﺎﯾﻞ ﺑﺮ ﻣﯿﺰان ﺟﺎﺑﺠﺎﯾﯽ اﻓﻘﯽ دﯾﻮار ﺑﺮرﺳﯽ ﺷﺪه اﺳﺖ. در اﯾﻦ راﺳﺘﺎ 12 آزﻣﺎﯾﺶ در ﺣﺎﻟﺖ اﺳﺘﺎﺗﯿﮑﯽ ﺑﺮاي دﯾﻮار ﻫﺎﯾﯽ ﺑﺎ ﺳﻪ ﻧﺴﺒﺖ ﺑﺪون ﺑﻌﺪ ﺿﺨﺎﻣﺖ ﺑﻪ ارﺗﻔﺎع دﯾﻮار ، ﻋﻤﻖ ﻣﺨﺘﻠﻒ ﮔﯿﺮداري دﯾﻮار )0,05 H و 0,15 H ( و ﺗﻌﺪاد ﻣﺨﺘﻠﻒ ﻣﯿﻞ ﻣﻬﺎري ﺟﺎﻧﺒﯽ اﻓﻘﯽ )1 و 2 ﻋﺪد( اﻧﺠﺎم ﺷﺪه اﺳﺖ. ﺟﻨﺲ ﻣﯿﻞ ﻣﻬﺎر ﻫﺎ از ورق ﻓﻮﻻدي ﺑﺎ ﭘﻮﺷﺶ ﮔﺎﻟﻮاﻧﯿﺰه ﺑﺎ ﻃﻮل و ﭘﻬﻨﺎي ﺑﻪ ﺗﺮﺗﯿﺐ 0,56 و 0.007 ﻣﺘﺮ ﻣﯽﺑﺎﺷﺪ ﮐﻪ ﺗﻮﺳﻂ ورﻗﯽ ﺑﻪ اﺑﻌﺎد 0,15 × 0,15 ﻣﺘﺮ ﺑﻪ دﯾﻮار ﺣﺎﯾﻞ ﻣﺘﺼﻞ ﺷﺪه اﺳﺖ. ﺧﺎك ﻣﻮرد اﺳﺘﻔﺎده رس و ﻣﯿﺰان ﺳﺮﺑﺎر ﮐﻨﺎري وارد ﺑﺮ دﯾﻮار kN/m 10 اﺳﺖ. ﻧﺘﺎﯾﺞ اﯾﻦ ﻣﻄﺎﻟﻌﻪ ﻧﺸﺎن از آن دارد ﮐﻪ ﺗﻐﯿﯿﺮات ﭘﺎراﻣﺘﺮﻫﺎﯾﯽ ﻧﻈﯿﺮ ﺗﻌﺪاد ﻣﯿﻞ ﻣﻬﺎر ، ﻣﯿﺰان ﻋﻤﻖ ﮔﯿﺮداري و ﻧﺴﺒﺖ ﺿﺨﺎﻣﺖ ﺑﻪ ارﺗﻔﺎع دﯾﻮار )ﻣﯿﺰان اﻧﻌﻄﺎف ﭘﺬﯾﺮي( ﺗﺎﺛﯿﺮ ﺑﺴﺰاﯾﯽ در ﻣﻘﺪار ﺟﺎﺑﺠﺎﯾﯽ اﻓﻘﯽ دﯾﻮار ﮔﺬاﺷﺘﻪ اﺳﺖ. از ﺑﯿﻦ اﯾﻦ ﭘﺎراﻣﺘﺮﻫﺎ ﻧﺴﺒﺖ ﺿﺨﺎﻣﺖ ﺑﻪ ارﺗﻔﺎع دﯾﻮار ﺑﻪ ﻋﻨﻮان ﻣﻬﻤﺘﺮﯾﻦ ﭘﺎراﻣﺘﺮ ﺷﻨﺎﺧﺘﻪ ﺷﺪ.

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