Geometric relationship-based skew bridge navigation effective navigation clear width determination method

Abstract

The invention discloses a geometric relationship-based skew bridge navigation effective navigation net width determination method, and the method is calculated by adopting the following formula: l = B-C or E, and the two values are taken as large values, wherein l is the effective navigation net width, B is the actual navigation net width, C is the anti-collision facility occupation width, E is the pier turbulence width, and C / E is the large value. When the skew bridge is a forward bridge, the actual navigation net width is calculated by adopting the following formula: B = (L-b-a * tan(alpha))* cos(alpha); when the skew bridge is a skew bridge, the actual navigation net width is calculated by adopting the following formula: B = (L-b) * cos(alpha), wherein L represents the span, b represents the width of a pier or a bridge column, a represents the length of the pier or the bridge column, and alpha represents the included angle between the water flow direction and the normal direction of the bridge axis. Plane arrangement of the bridge is combined with water flow navigation and river channel conditions of the bridge area, a basis is provided for planning and designing of the skew bridge, the effective navigation clear width can be obtained in the bridge design stage, and therefore, the bridge navigation design scheme is optimized, and ship navigation safety of the water area ofthe bridge area is guaranteed.

Description

technical field

[0001] The invention relates to the field of water transportation, in particular to a method for determining the effective navigation clear width of inclined bridges based on geometric relationships. Background technique

[0002] The foundation of water transportation is the waterway, which is an important public welfare transportation infrastructure of the country and is a limited non-renewable resource. As of the end of 2018, the navigable mileage of inland waterways nationwide was 127,100 kilometers, ranking first in the world, with 66,400 kilometers of inland waterway grades, of which 13,500 kilometers were third-grade and above waterways, basically formed with the Yangtze River trunk line, Xijiang shipping trunk line, Beijing-Hangzhou Canal, The waterway network of the Heilongjiang River System, the Yangtze River Delta and the Pearl River Delta is a waterway network with direct branches and rivers and seas as the backbone. With the development of waterw...

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