Model test study on dredging under high pile wharf

Abstract

In this paper, based on the dredging project of the soil under the high pile wharf, the study of the point suction desilting process under the wharf is carried out through the laboratory model test. The law of the change of mud equivalent concentration with time at different desilting depths is obtained, and the relationship and prediction curve of the change of desilting aging with the desilting depth are given. The test results show that in the horizontal direction, the diameter to depth ratio of the return pit is basically between 1.8-2.6, which is about 70% larger than the previous research results. In the vertical direction, The depth of the return pit is close to the dredging depth. The _v-t curve at different dredging depths presents an "L" shape change, which is divided into descending section, transitional section and stable section. The prediction curve of desilting aging can provide reference for the selection of desilting efficiency maximization scheme. Based on the prediction results, the dredging efficiency can be increased by about 10.3% during dredging.