List of Articles Laboratory model

• Open Access Article
  • Abstract Page
  • Full-Text
  
  1 - مطالعه آب‎شستگی در اثر تنگ‎شدگی موضعی آب‎راهه در مجاورت تکیه‎گاه پل
  سینا شیر محمدی ابراهیم نوحانی
  تکیه‎گاه یک پل در بستر یک آب‎راهه موجب کاهش سطح مقطع و انقباض جریان می‎شود. در چنین شرایطی علاوه بر آب‎شستگی موضعی تکیه‎گاه سازه، زمینه لازم برای وقوع پدیده آب‎شستگی انقباضی نیز فراهم می‎شود. پژوهش حاضر با هدف بررسی تأثیر تنگ‎شدگی بر آب&l More

  تکیه‎گاه یک پل در بستر یک آب‎راهه موجب کاهش سطح مقطع و انقباض جریان می‎شود. در چنین شرایطی علاوه بر آب‎شستگی موضعی تکیه‎گاه سازه، زمینه لازم برای وقوع پدیده آب‎شستگی انقباضی نیز فراهم می‎شود. پژوهش حاضر با هدف بررسی تأثیر تنگ‎شدگی بر آب‎شستگی تکیه‎گاه پل در اثر تنگ‎شدگی‎هایی با زوایای مختلف انجام شد. برای این منظور، سه زاویه تنگ‎شدگی با زوایای 30، 60 و 90 درجه در نظر گرفته شد و تکیه‎گاه‎ها در سه موقعیت ابتدا وسط و انتها مورد بررسی قرار گرفتند. نتایج این مطالعه نشان داد که با کاهش زاویه برخورد تنگ‎شدگی عمق آب‎شستگی کاهش می‎یابد و کاربرد شکاف موجب کاهش آب‎شستگی تکیه‎گاه به میزان درصد نسبت به حالت تکیه‎گاه بدون شکاف می‎گردد. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  2 - Investigation of Scouring Pattern Around the Axillary Screw Bridge in the Form of Pollen and Triangular Fish with their Observation and Comparison
  mahmmod valipour morghmaleki mohsen solimani babarsad
  There are currently several methods to prevent scouring the bridge base. These methods can be divided into two general categories. The first group is to increase the strength of the substrate materials against erosion, such as the use of a gobion, a rap ramp around the More

  There are currently several methods to prevent scouring the bridge base. These methods can be divided into two general categories. The first group is to increase the strength of the substrate materials against erosion, such as the use of a gobion, a rap ramp around the bridges, and the second one, by changing the pattern of the flow around the bases, reduces the strength of the erosion factors, which are the collars, And bridge bridges are examples of these methods. In this research, the experimental study of the impact of the bridge nose bridge on the scour depth reduction was considered. For this purpose, 22 experiments were carried out in the vicinity of the pollen and triangular nests at four angles (0.70,75,80.90) 215/0, 232/0, 261/0). According to the results of the experiment, the reduction of scour depth in the triangular nose support for different floats in all angles had the best performance in reducing the scour depth during the experiments. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  3 - Laboratory study of reducing the scour depth downstream of Calvert with a square cross section adjacent to the floor
  Mustafa Mansuri
  Protection of the downstream of culvert outlets against scour process, as a water conveyance structure, is a highly significant issue in design of culverts. In this study, the effect of bed litter length on downstream scour depth is investigated. For this purpose, exper More

  Protection of the downstream of culvert outlets against scour process, as a water conveyance structure, is a highly significant issue in design of culverts. In this study, the effect of bed litter length on downstream scour depth is investigated. For this purpose, experiments were carried out on the laminate with different lengths. According to the results, the particle landing at 22%, 33% and 66%, respectively, and the landing at particle landing of 2.5%, respectively. 15%, 20%, and 40% decreased particle depth by 20%, 25%, and 31%, respectively, indicating that bedding has a positive effect on decreasing downstream scour depth. The scour for the flooring considering the length of the layer showed that the scour depth decreases with the increase of the layer length due to the constant landing number. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  4 - Laboratory Study of Reducing The Scour Depth Downstream of CUlvert with a Square Cross Section Adjacent toThe Floor (Square-Shape Culvert)
  Mostafa Mansuri
  Protection of the downstream of culvert outlets against scour process, as a water conveyance structure, is a highly significant issue in design of culverts. In this study, the effect of bed litter length on downstream scour depth is investigated. For this purpose, exper More

  Protection of the downstream of culvert outlets against scour process, as a water conveyance structure, is a highly significant issue in design of culverts. In this study, the effect of bed litter length on downstream scour depth is investigated. For this purpose, experiments were carried out on the laminate with different lengths. According to the results, the particle landing at 22%, 33% and 66%, respectively, and the landing at particle landing of 2.5%, respectively. 15%, 20%, and 40% decreased particle depth by 20%, 25%, and 31%, respectively, indicating that bedding has a positive effect on decreasing downstream scour depth. The scour for the flooring considering the length of the layer showed that the scour depth decreases with the increase of the layer length due to the constant landing number. Manuscript profile