Primary Research On The Control Of Directional Move Of The Sediment On The Silt Coast

With the development of the ecnomy, the requests of the protection to coast and building ground via enclosing beach are proposed in the area of beach with silt. The research on the move of silt on the coast is significant to the development of the ecnomy, accelerating of the harbor building. It is the important issue in the projects of stable channel of river, barrier building, coast and harbor building, especially in the respect of coast erosion. The dissertation relies on the project of 863, and raises a set of control technology of the silt move to protect the silt coast. In the paper, all kinds of in-situ tests and simulate laboratory experiments are carried out and the effect factors are studied on the basis of summary of previous achievements. These include:(1) Through the testing of samples from the research area, the distribution, mechanic properties and move characteristics of silt are studied.(2) The investigation to the engineering environment of research area shows that there is the nonregular tide with different climax and minimum. And the reciprocate current with the parallel direction to the coast line.(3) The research of the sand content in waver of research area shows that it is lower in summer, which is less than lg/1.(4) The characteristics of the silt move on silt coasts are concluded based on the previous achievement.(5) Through the research of control experiment of silt move due to the influence of wave and current, the silt launching set with auto-adjustment to tide is built up, which is based on the investigation of effect factors on the research area, such as the current field, and the topographic.(6) The accelerating-filling test of sea engineers proves the effect of the man-made disturbing is obvious through setting dam around the experiment dam. The research offers the sand-move control system technique, making the best of nature force and realizing the timing launching, moving, filling and fixing. It is different from the normal ways of coast protection and has self-knowledge property right.