@article { author = {Heidarpour, M. and Ghorbani, B. and Keykhai, M. and Pirmohamadi, R.}, title = {Effect of Slot on Stability of Riprap around Bridge Piers}, journal = {Journal of Hydraulics}, volume = {3}, number = {3}, pages = {15-28}, year = {2008}, publisher = {Iranian Hydraulic Association}, issn = {2345-4237}, eissn = {2645-8063}, doi = {10.30482/jhyd.2008.85471}, abstract = {An accepted engineering method to deal with local scouring at bridge piers is to place riprap materialaround the pier foundation. Field experience has shown that riprap stones often disappear with time,with most severe failure occurring during floods; and refilling is frequently needed to replenish thelost stones. Therefore, notice to riprap stability is necessary and has been the aim of this paper. In thisresearch, four sizes of riprap located above, the same level and below the surface of the streambed andtwo slot sizes continued to the streambed were used. Effect of presence and size of slot on riprapstability and minimum necessary dimensions for finished riprap covering have been studied. Theresults obtained in the experiments range; show that riprap is more stable when using slot and thisstability is more evident with bigger slot. The performance of the two slot sizes decreases when usingthe bigger stones. Decrease in performance of the big slot using the bigger stones is more than that ofthe small slot. Furthermore, results show that the slot decreases the finished riprap covering andconsequently the riprap volume will decrease effectively. It has been found that the riprap placedabove and below the streambed have the most and the lowest stability, respectively.}, keywords = {}, title_fa = {تاثیر شکاف پایه بر پایداری سنگ چین در اطراف پایه های استوانه ای پل ها}, abstract_fa = {}, keywords_fa = {}, url = {https://jhyd.iha.ir/article_85471.html}, eprint = {https://jhyd.iha.ir/article_85471_1f0b373fa964784bf9d8b8a379832b7b.pdf} }