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Equal-section stepped tunnel buffer structure and design optimization method thereof

A buffer structure and ladder structure technology, applied in design optimization/simulation, tunnel, multi-objective optimization, etc., can solve the problems of difficult construction, labor-intensive, and inconvenient production.

Active Publication Date: 2021-02-23
HEBEI UNIV OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the trumpet-shaped buffer structure is poured, the formwork needs to be unfolded according to a certain curve or angle. The construction is difficult, the quality is difficult to control, and it is labor-intensive and inconvenient to manufacture. structure

Method used

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  • Equal-section stepped tunnel buffer structure and design optimization method thereof
  • Equal-section stepped tunnel buffer structure and design optimization method thereof
  • Equal-section stepped tunnel buffer structure and design optimization method thereof

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Embodiment Construction

[0085] Such as figure 1 with figure 2 As shown, a buffer structure of equal-step ladder type tunnel 1 designed by the present invention is a ladder structure arranged at the entrance of tunnel 1. Arranged in a shape, the lengths of the plurality of steps 2 are equal, and the radii decrease sequentially along the traveling direction of the train in the tunnel 1.

[0086] A design optimization method for a buffer structure of a stepped tunnel 1, characterized in that it comprises the following steps:

[0087] S1. Determine the order of the ladder buffer structure and the total length of the ladder buffer structure:

[0088] Let the order be n and the total length be l h , then the position coordinates of the junction of adjacent steps 2 is x i =-(i / n)l h , then the length of each buffer structure is l hi =x i -x i-1 = l h / n;

[0089] S2, optimize the cross-sectional area of ​​the stepped platform 2:

[0090] Let the cross-sectional area function of step platform 2 b...

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Abstract

The invention provides an equal-section stepped tunnel buffer structure and a design optimization method thereof. The buffer structure is of an equal-section stepped structure, and the design optimization method comprises the following steps of S1, determining the order and the total length of the buffer structure; S2, optimizing the cross-sectional area of each step of the buffer structure; S3, optimizing a buffer structure inlet; and S3, optimizing the number of steps. The method is high in practicability, an equal-section step structure which is convenient to construct and good in compression wave buffering effect can be designed and optimized, the compression wave at the tunnel portal is in an approximately linear regular growth state, the sharp increase phenomenon of the compression wave is avoided, and the method has a very high pneumatic buffering protection function and can be applied and popularized at the entrance of the high-speed railway tunnel.

Description

technical field [0001] The invention belongs to the technical field of tunnel design and construction, and in particular relates to an equal-segment stepped tunnel buffer structure and a design optimization method thereof. Background technique [0002] Usually, when a high-speed train enters a tunnel, the front of the train compresses the air in the tunnel to form a compression wave. This compression wave propagates along the tunnel at the speed of sound, and is emitted outward through the tunnel exit in the form of micro-pressure waves. Since micro-pressure waves cause impulsive noise and low-frequency vibrations to surrounding private houses, it is very important to reduce aerodynamic effects when designing high-speed railway tunnel entrances. [0003] Aiming at the aerodynamic effect of high-speed railway tunnels, a buffer structure is usually set at the tunnel entrance, and the horn-shaped buffer structure has the best buffer effect. However, when the trumpet-shaped bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/13G06F30/28E21D9/14G06F111/06G06F113/08G06F119/14
CPCG06F30/13G06F30/28E21D9/14G06F2111/06G06F2113/08G06F2119/14
Inventor 闫亚光赵亚军李军张童童张立功赵志超周海波张晓明
Owner HEBEI UNIV OF ENG
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