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Ventilation method of all-weather bridge passage

A ventilation method, all-weather technology, applied in the direction of bridges, bridge construction, bridge parts, etc., to achieve the effect of reducing project cost, uniform and stable distribution of wind flow, and saving construction period

Active Publication Date: 2020-10-02
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current domestic research on cross-sea all-weather bridge passages is still mainly focused on the selection of bridge types and spans, and the research on the ventilation of cross-sea all-weather bridge passages is still blank at home and abroad

Method used

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  • Ventilation method of all-weather bridge passage
  • Ventilation method of all-weather bridge passage
  • Ventilation method of all-weather bridge passage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] The cross-sea all-weather bridge channel length is 127km, of which the main span is a suspension bridge with a span of 3500m, and the other parts are other bridge types. The bridge is a two-way ten-lane bridge. There are two rooms in the bridge box girder for one-way traffic. The traffic volume is 2096 vehicles. / h, in order to ensure good ventilation and smoke exhaust effects under normal operation and fire conditions, the full transverse ventilation method in mechanical ventilation is selected for ventilation.

[0095] When the all-weather cross-sea bridge channel adopts the full transverse ventilation method, the air supply holes and exhaust holes are arranged at the lower and upper positions of the all-weather bridge channel, and the air blower is directly installed at the air supply hole, and the air blower is directly installed at the exhaust hole to realize the inside of the channel. The polluted air and dust are exchanged with the fresh air outside. Mainly consider...

Embodiment 2

[0118] The cross-sea all-weather bridge channel length is 3km, the bridge is two-way ten-lane, there are two rooms in the bridge box girder for one-way traffic, the traffic volume is 2090veh / h, to ensure the ventilation and smoke exhaust effect under normal operation and fire conditions Good, choose the semi-transverse ventilation method in mechanical ventilation for ventilation.

[0119] When the all-weather cross-sea bridge channel adopts the air supply and semi-transverse ventilation method, because the cross-sea all-weather bridge channel is longer, only 100m bridge channel is intercepted as the calculation length in the calculation, and a three-dimensional geometric model is established for calculation. Air supply holes are arranged in the lower part, and a blower is directly installed at the position of the air supply holes to realize the exchange of polluted air and dust in the channel with fresh air from the outside. Mainly study the influence of the position of the air s...

Embodiment 3

[0140] When the all-weather cross-sea bridge channel adopts the air supply semi-transverse + exhaust shaft ventilation method, the air supply hole is arranged under the all-weather bridge channel, and the air blower is directly installed at the air supply hole to send fresh air from the outside into the bridge channel. The layout parameters of the air supply holes are the same as those in Example 2. When the longitudinal wind speed in the channel is required to be greater than 10m / s, an exhaust shaft or exhaust hole is set. The exhaust shaft and exhaust hole are set according to the bridge type. as follows

[0141] When the all-weather cross-sea bridge channel is a suspension bridge and a cable-stayed bridge, consider setting up a fan room and exhaust shaft inside the bridge tower to discharge polluted air and dust in the channel to the outside of the all-weather cross-sea bridge channel.

[0142] When the all-weather cross-sea bridge channel is a suspension bridge and a cable-stay...

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Abstract

The invention discloses a ventilation method for an all-weather bridge passage. Mechanical ventilation is adopted when the product of the passage length L of a sea-crossing all-weather bridge passagefor bidirectional traffic and a designed hour traffic volume N is larger than 6 * 10<5>; when the product of the passage length L of the sea-crossing all-weather bridge passage for two-way traffic andthe designed hour traffic volume N is smaller than 6 * 10<5>, natural ventilation is adopted; when the product of the passage length L of the one-way traffic sea-crossing all-weather bridge passage and the designed hour traffic volume N is larger than 2 * 10 < 6 >, mechanical ventilation is adopted; when the product of the passage length L of the one-way traffic sea-crossing all-weather bridge passage and the designed hour traffic volume N is smaller than 2 * 10 < 6 >, natural ventilation is adopted; by the adoption of the above ventilation mode, ventilation systems such as an air supply duct, an air exhaust duct and a large fan room do not need to be arranged, the construction cost can be saved, the later maintenance cost and time can be saved, and the influence of severe weather conditions such as offshore typhoon and rainstorm on bridge passage driving passage can be reduced.

Description

Technical field [0001] The invention belongs to the technical field of bridge equipment, and specifically relates to a ventilation method for all-weather bridge passages. Background technique [0002] With the strengthening of my country's comprehensive national strength and the continuous improvement of engineering construction technology, my country's transportation infrastructure construction has achieved rapid development, and the construction of channels such as the Taiwan Strait Passage, Qiongzhou Strait Passage, and Bohai Strait Passage that cross the strait has important economic and social significance. Increasingly. In particular, the construction of the Taiwan Strait Passage will not only help strengthen the ties between various parts of our country, drive the economic development along the route, and promote the development of the national economy. The cross-sea all-weather bridge channel plan is to ensure that vehicles can pass safely and smoothly under severe weathe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/00E01D2/04
CPCE01D19/00E01D2/04
Inventor 夏永旭韩兴博张卜
Owner CHANGAN UNIV
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