An Optimal Arrangement Method for Bridge Groups

A layout method and bridge technology, applied in the direction of measuring devices, machine/structural component testing, instruments, etc., can solve problems such as unreasonable optimal layout of upstream and downstream bridges, research on cumulative effects of bridge groups, etc., to reduce pressure, method Simple and easy to implement, the effect of reducing the cumulative effect

Active Publication Date: 2017-04-12
HOHAI UNIV
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  • Claims
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Problems solved by technology

At present, for the problem of pier scour, engineering practice often only considers a single pier or a single bridge, and does not study the cumulative effect of bridge groups (multiple bridges along the river direction), so that it cannot be reasonably optimized Layout of upstream and downstream bridges

Method used

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  • An Optimal Arrangement Method for Bridge Groups
  • An Optimal Arrangement Method for Bridge Groups
  • An Optimal Arrangement Method for Bridge Groups

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with the accompanying drawings.

[0039] The present invention optimizes and improves the arrangement (bridge spacing and pier column spacing) of bridge groups (multiple bridges along the river direction) in the river, and aims to determine a bridge spacing critical value so that when the bridge spacing is greater than the critical value, the bridge The scour between piers does not affect each other, that is, there is no cumulative effect, so the scour law can be considered as a conventional single bridge.

[0040] The method of the present invention obtains the critical conditions required by the optimal arrangement method through a water tank model test. As shown in Figure 2, the water tank model test is carried out in a variable-slope circulating glass water tank. Firstly, the reliability of the test system is verified through the single-pier column test, and then the double-pier column is tested ac...

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Abstract

The invention discloses an optimal arrangement method of a bridge coup. The method is characterized in that the critical conditions for the optimal arrangement can be obtained by a water tank test which is carried out through a varying-slope circulating glass water tank (1). The method comprises the steps of 1, performing single-columned pier test to verify the reliability of a test system; 2, testing with two pier columns according to different pier spaces; 3, respectively observing the local scouring features of single pier column and the upstream and downstream pier columns in step 1 and 2; 4, analyzing to obtain the critical conditions for the optimal arrangement, namely, the critical conditions that two piers do not influence each other. With the adoption of the method, the critical condition that the upstream and downstream bridge piers do not influence each other in scouring is determined, which is of general guide significance for the optimal arrangement of the bridge group; the method is simple and easy to be carried out; the construction cost and the accumulation influence on the bridge group can be reduced; therefore, the pressure from bridge pier scouring damage and urban flood control can be reduced. The formula is shown in the specification.

Description

technical field [0001] The invention belongs to the technical field of river-related engineering, and relates to a method for arranging bridges, in particular to an optimal arrangement method for a group of bridges. Background technique [0002] The construction of bridges in natural rivers will inevitably lead to changes in the water and sand conditions near the bridge piers. The emergence of water flow structures such as the downward flow in front of the pier, the horseshoe vortex on the side of the pier, and the wake vortex behind the pier will cause corresponding adjustments in the bed surface around the pier column to form scour pits, endangering the stability and safety of the building itself, and affecting the river section of the bridge Therefore, the problem of pier scour has been generally paid attention to in engineering practice. With the development of society and economy, the number of bridges on rivers continues to increase, and the urban river sections are m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M10/00
Inventor 唐洪武王浩刘全帅王瑶肖建峰
Owner HOHAI UNIV
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