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Method for determining safe operation condition of gate opening of ship lock in tidal river reach

A technology for safe operation and determination of methods, applied in design optimization/simulation, climate change adaptation, instrumentation, etc., and can solve problems such as long research time, multi-manpower and material resources

Active Publication Date: 2020-01-24
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method not only requires actual measurement data, but also needs to carry out a physical model test every time the safety condition of the gate is determined, which requires a lot of manpower and material resources and a long research time

Method used

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  • Method for determining safe operation condition of gate opening of ship lock in tidal river reach
  • Method for determining safe operation condition of gate opening of ship lock in tidal river reach
  • Method for determining safe operation condition of gate opening of ship lock in tidal river reach

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Experimental program
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Embodiment

[0071] The present invention selects a ship lock as the research object to carry out case analysis.

[0072] (1) Measure the elevation of the bottom of the lower gate to be -4.46m, and the gate width to be 11.5m;

[0073] (2) Obtained from the design parameters of the ship lock, the highest navigable water level is 3.71m, the lowest navigable water level is 0.96m, and the normal water level is 1.64m, and the rated maximum force condition of the gate hoist is 300KN;

[0074] (3) When the upstream water level is 1.64m, the difference between the upstream and downstream water levels is -1.0m, -0.8m, -0.6m, -0.4m, -0.3m, -0.2m, -0.1m, 0m, 0.1m, 0.2m, 0.3m, 0.4m, 0.6m, 0.8m, 1.0m.

[0075] The inequality between water level difference and flow velocity is:

[0076]

[0077] (4) According to the conditions in (3), establish the relationship between the hoist force and the water level difference:

[0078] F=96.21ΔZ 2 -79.56ΔZ+211.82

[0079] (5) According to the fitting formu...

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Abstract

The invention discloses a method for determining safe operation conditions of gate opening of a ship lock in a tidal river reach, and belongs to the technical field of water transportation. The methodcomprises: in a gate opening process, upstream and downstream having water level differences, setting different upstream and downstream water level differences, and establishing a relational expression between the water level differences and the gate front surface flow velocity; establishing a flow calculation formula in the gate chamber when the gate is opened, determining the average flow velocity in front of the gate through the formula, and establishing a relational expression between the water level difference and the gate hoist stress through stress analysis; according to the flow ratelimiting condition in the lock chamber and the maximum rated stress condition of the hoist, comprehensively obtaining a switch-on critical condition meeting the flow rate condition and the hoist stress condition. According to the method, the safe operation condition of opening the gate can be quickly obtained, so that the tide is utilized to open the gate to the greatest extent, and meanwhile, theblindness of experience operation is avoided.

Description

technical field [0001] The invention belongs to the technical field of water transport, and in particular relates to a method for determining safe operation conditions for ship locks in tidal river sections. Background technique [0002] The water level of the approach channel upstream and downstream of the ship lock in the tidal river section is affected by the ebb and flow of the tide, and the water level difference changes dynamically. In a certain period of time, there may be zero water level difference between the upstream and downstream of the ship lock. Open at the same time, the ship can pass directly, which can greatly improve the passing capacity. This operation mode is the operation of opening the gate. [0003] Gate opening management is an all-round, whole-process, and three-dimensional management activity. Its management content involves meteorological and hydrological conditions, tide level fluctuations, ship types and seaworthiness, approach channel condition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F119/14
CPCY02A10/30
Inventor 吴腾吴玲莉秦杰冯兴国王瑞彩夏莉敏
Owner HOHAI UNIV
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