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A wind pressure monitoring and danger warning method for a partition wall in a tunnel

A wind pressure and tunnel technology, which is applied in the direction of measuring devices, measuring fluid pressure, instruments, etc., can solve the problems of large errors and failure to reflect the force of the middle partition wall, and achieve cost reduction, high reliability, and reduced errors Effect

Active Publication Date: 2022-03-08
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned problems that existing wind pressure monitoring methods for partition walls in tunnels have large errors and cannot reflect the real stress of partition walls, the present invention provides a wind pressure monitoring and danger warning method for partition walls in tunnels, which can Azimuth, high frequency, open remote monitoring and danger warning of wind pressure in different directions and positions on the partition wall of the tunnel

Method used

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  • A wind pressure monitoring and danger warning method for a partition wall in a tunnel
  • A wind pressure monitoring and danger warning method for a partition wall in a tunnel
  • A wind pressure monitoring and danger warning method for a partition wall in a tunnel

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Embodiment 1

[0041] A method for monitoring wind pressure on a partition wall in a tunnel, comprising the following steps:

[0042] Step 1, according to the size and shape of the tunnel and the characteristics of the auxiliary components on the partition wall, combined with the intersection of two-way trains, set up wind pressure monitoring points: ① Arrange i monitoring points symmetrically along both sides of the partition wall at the entrance and exit of the tunnel; ②For the corner area of ​​the curved surface in the tunnel, j monitoring points are arranged on both sides of the curved surface; ③K monitoring points are arranged symmetrically along both sides of the middle partition wall in the straight section inside the tunnel, and the monitoring points of the straight section The position should be arranged in the middle area of ​​the tunnel as much as possible; the number of measuring points P above satisfies: P=2(i+j+k) where i, j, and k respectively represent the number of one-sided ...

Embodiment 2

[0071] The wind pressure risk warning method for partition walls in tunnels, on the basis of Embodiment 1, carries out the following operation steps.

[0072] Step 6: According to the superimposed equation P in step 5 L ,P R , combined with the influence area of ​​the data collected by the wind pressure sensor, take the 1m length of the middle partition wall along the forward direction of the train as the calculation unit, and calculate the area of ​​the middle partition wall at s=1×(H u -H f ) Bending moment value M received in the range L and M R ,in The calculation result takes the maximum value M max =max(M L ,M R ), that is, the bending moment value of the partition wall under the most unfavorable state;

[0073] Step 7: According to the maximum bending moment value M obtained in step 6 max , combined with the design bending moment value M of the partition wall, take the risk factor When γ≥1, the partition wall is in a dangerous state; when γ<1, the partition wa...

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Abstract

The invention belongs to the technical field of wind pressure monitoring. Aiming at the above-mentioned problems that the existing wind pressure monitoring method for partition walls in tunnels has large errors and cannot reflect the real stress situation of partition walls, it provides a wind pressure monitoring method for partition walls in tunnels. and hazard warning methods. Step 1, selection of wind pressure monitoring section; Step 2, installation and arrangement of wind pressure monitoring system; Step 3, setting of control parameters of signal acquisition instrument and sensor base, setting of monitoring cycle; Step 4, collection of wind pressure data and Upload; step 5, data equation fitting and superposition; step 6, overall force calculation; step 7, stability check and danger warning of the middle partition wall. The invention solves the problem of high-frequency, high-precision, multi-directional wind pressure monitoring in an open environment where personnel cannot approach, and proposes a highly reliable risk early warning method for data acquired by the monitoring system.

Description

technical field [0001] The invention belongs to the technical field of wind pressure monitoring, and in particular relates to a wind pressure monitoring and danger warning method for a partition wall in a tunnel. Background technique [0002] In mountain tunnels, in order to reduce the amount of construction, it is often designed in the form of a single hole and two lines, separated by a wall in the middle, called the middle partition wall, and the height of the middle partition wall is about 6-8 meters. When the train is running at high speed in the tunnel, the distribution of wind pressure on the partition wall is very uneven. Different train lengths and different locomotive shapes have different pressures in different directions at different heights of the partition walls in the tunnel, especially at the locomotive. The central partition wall causes strong lateral pressure on the central partition wall, which affects its stability. Therefore, it is of great significance ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L19/12G01L19/08
CPCG01L19/12G01L19/086
Inventor 张拥军徐文协刘高军迟胜超刘飞张震远刘兵王观群王盛
Owner QINGDAO TECHNOLOGICAL UNIVERSITY