Tunnel evacuation air supply method, personnel evacuation method and evacuation air supply structure

Abstract

The invention relates to a tunnel evacuation air supply method, a personnel evacuation method and an evacuation air supply structure. The tunnel evacuation air supply method comprises the following steps that an evacuation channel in the prior art is divided into an evacuation channel body and a rescue lane, and air is supplied to the evacuation channel body through an air supply device via an airsupply pipe, so that the evacuation channel body is in a positive pressure state. According to the tunnel evacuation air supply method, the personnel evacuation method and the evacuation air supply structure, under the condition that an existing evacuation structure is not changed, the evacuation channel body with the large size in the prior art is divided into the evacuation channel body with the small size and the rescue lane, the section of the evacuation channel body is small, and the size of the evacuation channel body is small, so that the calculated value of the pressurized air supplyamount is smaller than that in the prior art, the requirement for the power performance of a pressurized air feeder is low, and the problems that the installation space of ventilation equipment is insufficient, and fan type selection is difficult are solved; due to the fact that the air supply pipe is inserted into one side of the evacuation channel body, the sealing performance between the side wall of the evacuation channel body and the air supply pipe is good, and the leakage condition is avoided; and the number of air leakage points of the evacuation channel body is small, the two ends ofthe evacuation channel body are closed and not ventilated, the evacuation channel body can maintain positive pressure easily as a whole, and personnel evacuation is safe and reliable.

Description

technical field [0001] The invention relates to the technical field of tunnel safety evacuation and building smoke prevention, in particular to an evacuation air supply method under a tunnel driveway slab, a personnel evacuation method and an evacuation structure. Background technique [0002] At present, my country has become the country with the largest number of tunnel projects, the most complex and the fastest development in the world. According to the "Statistical Bulletin on the Development of the Transportation Industry in 2018" released by the Ministry of Communications, as of the end of 2018, there were 17,738 highway tunnels across the country with a total length of 17,236,100 meters, including 1,058 extra-long tunnels with a length of 4,706,600 meters and 4,315 long tunnels with a length of 7,421,800 meters. While the construction of highway tunnels brings convenience to economic development and people's production and life, it also puts forward higher requirement...

AI Technical Summary

Problems solved by technology

[0004] There are three major problems when the above-mentioned evacuation channel 205 setting method is applied to long tunnels and extra-long tunnel projects: ①The pressurized air supply effect is poor, and the two ends of the evacuation channel 205 are not closed, and a large amount of pressurized air supply airflow is used for rescue vehicles entering and exiting the tunnel entrance. The pressure is released to the outside through both ends; ②The evacuation channel 205 has a large cross-section and a large volume, resulting in a large calculated value of the pressurized air supply volume, which requires high power performance of the pressurized blower fan 210, resulting in insufficient installation space for ventilation equipment and fan type selection Difficult problems; ③ There are many air leakage points in the evacuation passage 205, and it is difficult to maintain positive pressure in the evacuation passage 205 as a whole, which poses certain safety hazards for personnel evacuation

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