The place where bulkhead manufacture of the rivers and the like is installed and the fixed weir and its bulkhead structure in order to prevent the erosion and the like which is generated at the place where bulkhead manufacture is not installed

摘要

Topic The place where bulkhead manufacture of the rivers and the like is installed and the bulkhead structure which prevents the erosion and the like which is generated with boundary of the place where bulkhead manufacture is not installed is offered.SolutionsIn the place where it is far from the concrete block 3 which is most Kawasita in the string of bulkhead manufacture position on central side of the river, Kawahata side being rectilinear, central site of the river installs the fixed weir 8 of curved line form. Between bulkhead manufacture and fixed weir 8 the velocity of flow which flows the fixed weir width of outflow section 10 of Kawasita side between 8 which produces the velocity of flow difference of the velocity of flow which flows from curved line form and bulkhead manufacture and width and bulkhead manufacture and the fixed weir of the inflow section of the Kawakami side which is between the fixed weirs is adjusted and velocity of flow is changed by the fact that it locks. Because of this, digging the curved line side of the fixed weir, it becomes quicker and than the velocity of flow which flows the place where bulkhead manufacture is installed and it prevents the erosion and the like which is generated between the place where bulkhead manufacture is not installed. Choice figure Drawing 2