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The permeable spur a new kind of river buildings as the waterway project , its main function is fixed regulation line , adjust the channel width to control water flow and increase the flow rate of the line slot , to produce the right amount of erosion of the riverbed , to achieve the increase in the depth the purpose of the fairway . When used as bank protection works , groins can play to the the revetment advantage of the intermittent , slow inshore flow rate , prompting siltation , to achieve the purpose of protecting the embankment . Not only that, the road bridge project , the groin can be used for protection embankment to guide the mainstream through the bridge opening . In land reclamation projects , the construction of groins can promote siltation, protect the seawall . Estuaries, coastal areas , groins , slow down and prevent wave action also play an important role . Therefore , a correct understanding of the construction of groins riverbed sedimentation characteristics of the river to play an important role in scientific management and the design of groins . This thesis with more comprehensive summary overview of the the permeable spur technology application , prototype survey indoor model test and theoretical analysis on the basis of permeable spur trajectory angle analysis of the riverbed sedimentation characteristics , the main work and research done : First, through a conceptual model for the main analysis the different the pick angle permeable groins around flow characteristics , pick angle Groin water surface morphology , vertical velocity distribution , transverse velocity distribution as well as the length and width of the dam flow rate decreases District drawn permeable spur behind the dam contour map of erosion and deposition , and departure from the mechanism of local scour around permeable spur groyne near the erosion and deposition morphology study and explore . Second , analysis of the impact of the various parameters of the maximum scour depth , and has been made in the experimental data , dimensional analysis principle and multiple linear regression analysis , the permeable spur maximum scour depth formula . Clear concept of the formula , type the formula to calculate the permeable spur scour depth can be given satisfactory results to estimate the maximum scour depth , practical projects . Permeable spur entity groins Apart from in Batou near scour downstream also have scoured Batou not only pay attention to , so their protection , but also protection of the entire dam , this should be worth attention.
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