The Geometric Parameters Of The Spur Dikes On The Influence Of The River Course That Inflow Of Tributaries To Main Steams

Natural river tributaries are straight in the transfer period, trunk channel shape isnot the shape of a single straight segment, but more are bent. In the actual rivers likethe tributaries and trunk channels are more and more, that is a common flowphenomenon. See more at the Yangtze River areas, gan river and the upstream ofHeilongjiang river which in the northeast of china. At the intersection of Main streamand the tributaries, in the intersection zone the water complex, turbulence, and theturbulence flow mixing effect is very severe. For the larger tributaries of the waterwill cause a scour to Channel concave bank, the damage is very serious. After thetributaries entering the bending trunk channel river, the water interactions, thecomplex structure, within a certain range of caused great threat to the stability of thedownstream river. Therefore, it is necessary to decorate a river bank revetmentengineering at main section downstream in the inflow of the corners.In the revetment engineering, Spur dike is one of the most common way ofrevetment. The flow in the vicinity of the spur dike is complicated.So far, the study offlow patterns around the spur dike and does not have a specific and completetheoretical basis. In practical engineering, the river boundary and changeful, the flowstructure is complex, affects the inflow of curved river downstream flow are verymore.The test on the basis of research achievements which in the past to spur dike andriver flow hydraulic characteristics, this experiment in theory study, indoor physicalmodel test and theoretical analysis on the basis of the spur dike is studied in group ofgeometric parameters on the effect of oblique type bending river river flow, this paperanalyzes the dam length and spacing on the influence of this flow. The main work andresearch results are as follows:First of all, the test through a lot of theoretical research and literature datacompilation, analysis the inflow of bend channel flow hydraulic characteristics,through theoretical analysis, decorate in the downstream side of concave bank USESthe dikes along for revetment engineering.Second, through physical model experiment, using a Flow Tracker measurementpoint for data collection, sorting data, through the data processing is analyzed emphatically dam length and spacing of the influence of the inflow of bend channelFlow.Finally, through scheme comparison, analyzes the dikes along the geometricparameters on the downstream flow hydraulic characteristics of rivers into the sink,the influence of the oblique bending for dikes along the tributaries of trunk channelrevetment engineering provides an important reference basis.