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Real-time prediction numerical method for general scour of river-crossing bridge

A numerical method and cross-river technology, which is applied in the computer field, can solve the problems of inability to obtain timely access, excessive time and manual input, and difficulty in making real-time forecasts for flood control of bridges, so as to avoid multiple empirical effects.

Inactive Publication Date: 2011-04-06
BEIJING JIAOTONG UNIV
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Problems solved by technology

[0003] At present, the general scouring calculation of cross-river bridges is mainly based on semi-empirical and semi-theoretical formulas stipulated in railway or highway codes. During the use and calculation process, some empirical coefficients or variable empirical values ​​still need to be looked up in tables and calculated by hand, which takes a lot of time and effort. Manual input, calculation results are also related to personal experience, and the scouring results of tracking flood changes cannot be obtained in time, making it difficult to make real-time forecasts for bridge flood control

Method used

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  • Real-time prediction numerical method for general scour of river-crossing bridge
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  • Real-time prediction numerical method for general scour of river-crossing bridge

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Embodiment 1

[0023] Obviously, many modifications and changes made by those skilled in the art based on the gist of the present invention belong to the protection scope of the present invention.

[0024] The numerical method for real-time forecasting of general scour of cross-river bridges includes the following steps;

[0025] Step 1; adopt the following mathematical partial differential equations;

[0026] That is, the water flow continuity equation and motion equation:

[0027] ∂ A ∂ t + ∂ Q ∂ x = 0 - - - ( 1 )

[0028] ∂ ∂ t ( Q A ) + 1 2 ∂ ...

Embodiment 2

[0049] Embodiment 2: The present invention relates to a numerical method for real-time forecasting of general erosion of a bridge across a river, comprising the following steps;

[0050] Step 1: Follow the basic theory of water and sand movement, establish a mathematical partial differential equation, discard many empirical formulas and coefficients in the previous formulas, and make the evolution of riverbed scour more realistic;

[0051] Step 2: Interpolation is used for the irregular cross-section within the calculation range, so that the calculated cross-sectional area is very close to the actual cross-section, which overcomes the large error caused by simplifying the cross-section into a rectangle in the past;

[0052]Step 3: Using the equation of erosion changing with time and introducing time sub-steps, the real-time data output of the erosion process is realized, which can provide real-time forecast of the erosion situation for engineering management;

[0053] Step 4: ...

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Abstract

The invention relates to a real-time prediction numerical method for general scour of a river-crossing bridge, belonging to the technical field of computers. The invention especially aims at a dynamic relation between river bed scour and a flood process, adopts a real-time scour evolution simulation equation of the river bed of a bridge crossing river reach in a flood discharge process, considersthe characteristics of a compressed river reach, and realizes numerical simulation and real-time prediction of the state of scour at bridge opening through a computer. The invention can be used in the flood control safety management of highway bridges and railway bridges, realizes real-time mastery of the state of river bed scour during the flood process, and avoids disaster caused by the scour of a large bridge.

Description

technical field [0001] The invention relates to a numerical method for real-time forecasting of general scouring of bridges across rivers, and belongs to the technical field of computers. The invention is especially aimed at the dynamic relationship between riverbed scour and flood process, adopts the real-time scour evolution simulation equation of riverbed in the process of flood flow, considers the characteristics of compressed river section, and realizes numerical simulation and real-time forecast by computer. The invention can be used in the flood control safety management of highway bridges and railway bridges, realizes real-time grasp of river bed scour conditions along with flood process, and avoids disasters caused by bridges being scoured. Background technique [0002] Most of the bridges crossing the river have a compressed flow section, which may cause the river bed of the bridge section to be generally scoured during the flood, and cause the hidden danger of los...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCY02A10/40
Inventor 齐梅兰郭辉马先华甘森
Owner BEIJING JIAOTONG UNIV
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