Method for calculating hydrodynamic force of tunnel in suspension state in water
A technology of water suspension and calculation method, applied in the direction of calculation, computer-aided design, design optimization/simulation, etc., can solve the problem of lack of applicability of theoretical calculation formula design guidance, and achieve a significant effect of simplifying the calculation method of force
Active Publication Date: 2020-08-28
CHINA RAILWAY TUNNEL SURVEY & DESIGN INST +1
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Problems solved by technology
[0004] For a long time, there has been a lack of applicable theoretical calculation formulas as design guidance for the hydrodynamic calculation of immersed tunnels or floating tunnels in the suspended state of the tunnel section.
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[0017] In order to better understand the purpose, structure and function of the present invention, a method for calculating the hydrodynamic force of a tunnel suspended in water will be further described in detail below in conjunction with the accompanying drawings.
[0018] The hydrodynamic calculation method of the tunnel suspended in water according to the present invention considers that in rivers or ocean currents, the force of the tunnel pipe section suspended in water is complicated, and the tunnel is mainly subjected to downstream momentum and constant current lift. The present invention considers the size of the downstream momentum and the constant flow lift, and comprehensively involves factors such as the shape, length, section size, surface roughness, suspension depth, water flow parameters and other factors of the tunnel, and calculates a kind of tunnel in the process of sinking or sinking. The key parameters of the design in the suspension state affect the safe co...
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The invention discloses a method for calculating hydrodynamic force of a tunnel in a suspension state in water. The method comprises the steps that according to a pipe section shape coefficient, a pipe section roughness influence coefficient, a suspension depth influence coefficient, water density, the maximum water flow speed, the length of a suspension pipe section, the height of the cross section of the pipe section in the water flow direction and the included angle between the pipe section and the designed water flow direction, a pipe section water flow force front impact force standard value is calculated; and according to the vortex lift coefficient, the water density, the maximum water flow speed, the length of the suspension pipe section, the height of the cross section of the pipesection in the water flow direction, the vortex frequency and the vortex characteristic time, the pipe section transverse flow lift standard value is calculated. The invention provides a simplified stress calculation method for the suspension state of the tunnel, and the method is of great significance to tunnel stress condition analysis of overall design in the earlier stage of engineering.
Description
technical field [0001] The invention relates to the field of tunnel design, in particular to a hydrodynamic calculation method for a tunnel suspended in water. Background technique [0002] my country is a large ocean country with a coastline of 18,000 km, spanning 22 latitude zones; more than 6,500 islands with a coastline of 14,000 km; and inland rivers with a total length of 430,000 km, of which the length is more than 1,000 km There are more than 20 rivers in China. There are nearly 100 cities with a population of over one million in the country, and most of them are built and prospered by rivers. However, rivers and oceans divide cities or regions, and there is an urgent need to build passages across rivers and seas to form an overall rapid transportation system for the country. Road Network. [0003] Tunnels have the advantages of all-weather, no impact on shipping, and strong resistance to war damage. They are one of the main ways to build cross-river and sea passage...
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IPC IPC(8): G06F30/13G06F30/20G06F119/14
CPCG06F30/13G06F30/20G06F2119/14G06F30/28G06F2113/08G06F2113/14
Inventor 贺维国范国刚吕书清陈翰曹威
Owner CHINA RAILWAY TUNNEL SURVEY & DESIGN INST