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Determination method of maximal transverse flow of entrance channel of encircling-type breakwater

A technique of determining the maximum cross flow and determining the method, applied in hydraulic models, etc., can solve problems such as insufficient representativeness, difficulty in guiding actual work, unknown size of cross flow, etc., and achieve reasonable and credible calculation results

Inactive Publication Date: 2015-07-01
HOHAI UNIV
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  • Claims
  • Application Information

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Problems solved by technology

There are two main problems in this method of calculating crossflow: first, the result is equivalent to a random value, which is difficult to reflect the long-term or intra-year distribution characteristics of crossflow, and is not representative enough; secondly, the size of crossflow in general cases is unknown, Difficulty directing actual work

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  • Determination method of maximal transverse flow of entrance channel of encircling-type breakwater
  • Determination method of maximal transverse flow of entrance channel of encircling-type breakwater
  • Determination method of maximal transverse flow of entrance channel of encircling-type breakwater

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Embodiment approach

[0037] (1) Overview of the project plan

[0038] When carrying out the research on the cross flow calculation of the entrance channel of the encircling breakwater in Lianyungang Port, it is considered that the approach channels of Lianyungang Port Area and Xuwei Port Area are both dredged to 300,000 tons level. Among them, the approach of the approach channel in Lianyungang Port is 63°-243°, the elevation of the channel bottom is -22.5m (below the theoretical base level, the same below), the bottom width of the channel is 350m, and the slope is 1:7; the approach channel of Xuwei Port Area is 16 °-196°, the elevation of the channel bottom is -22.5m, the channel bottom width is 360m, and the side slope is 1:7; the Guanhe Estuary renovation project has been completed, the double guide dikes extend to the -2m isobath, and the elevation of the dike crest is 3m. The specific layout is as figure 1 .

[0039] (2) Establish a mathematical model of power flow

[0040] Established wat...

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Abstract

The invention relates to a determination method of maximal transverse flow of an entrance channel of an encircling-type breakwater. A relation between the transverse flow and tidal range of the channel is discussed by stimulating and calculating the maximal transverse flow of the entrance channel of the encircling-type breakwater under different tidal types through adopting a two-dimensional tide mathematical model, and an empirical calculation formula of the transverse flow of the entrance channel is put forward. The maximal transverse flows of the entrance channel under corresponding cumulative frequencies can be obtained by substituting forecasted tidal ranges under different cumulative frequencies into the formula to be calculated by virtue of the empirical formula according to one-to-one linear relation between the transverse flows and the forecasted tidal ranges of the entrance channel, and the distribution of the cumulative frequencies of the transverse flow can be further obtained; and the maximal forecasted tidal range in a concerned period is obtained according to a tidal table, and the maximal transverse flow of the entrance channel in the period can be obtained by estimating so as to guide design of channel scale and daily management of entering and leaving of ships in a harbor district.

Description

Technical field: [0001] The invention relates to a method for simulating and forecasting an offshore tidal current field, in particular to a method for determining a channel cross flow at an encircling breakwater entrance. Background technique: [0002] In recent years, with the rapid improvement of my country's economic strength, the total volume of foreign trade has increased significantly, and the construction and development of port waterways are facing huge demands and opportunities. At present, the coastlines with good natural conditions have been fully developed, and the construction focus of port channel engineering has gradually shifted to muddy coasts and silty coasts. In the open sea area with gentle slope and shallow water, the action of waves is obvious, and the movement of water and sand is complicated. In order to achieve the purpose of "shallow water and deep use", it is generally necessary to arrange encircling breakwaters, so as to prevent waves and sand, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B1/02
Inventor 张玮张婧钱伟李泽王国超庞亮金新汪魁
Owner HOHAI UNIV
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