Method for ventilating double-hole tunnel network

Abstract

The present invention discloses a method for ventilating double-hole tunnel network, which comprises the following steps : A. installing two transverse ventilation channels for exchanging air at the appropriate positions of two channels for forming a bidirectional air exchange system; B. designing the most economic air quantity of the double line to one half of the total required air quantity of the channel; C. confirming the positions of the transverse ventilation channels according to a principle that the energy consumption of the ventilation is minimal; D. obtaining the quantity of the airexchanged by the bidirectional air exchange system according to the principle that the air exchange quantities of two transverse channels are equal and the concentrations of the pollutant at the channel outlets are equal for obtaining the air quantity exchanged by the bidirectional exchange system; E. dividing a ventilation network map according to the position of the transverse ventilation channels; F. calculating the ventilation network according to an air quantity balancing law, an air pressure balancing law and a resistance law; G. calculating the pressure of the ventilation network with amesh iteration correction air quantity method; and H. confirming the number of sets and standards of the fans according to the pressure increase and air quantity required by each ventilation segmentof the network. The method for ventilating double-hole tunnel network cancels the vertical ventilation well, greatly reduces the ventilation equipment and can greatly reduce the building cost and operation management cost.

Description

technical field [0001] The invention relates to the technical field of tunnel ventilation, and more specifically relates to a method for double-hole tunnel complementary network ventilation, which can be applied to super-long tunnel ventilation projects with a length of 3-8 km in highways or urban roads. Background technique [0002] At present, the ventilation method is a crucial factor in the construction and operation of the tunnel project, which is related to the operation effect, safety level and operation cost of the tunnel project. [0003] Traditional highway tunnel ventilation methods include natural ventilation, full horizontal ventilation, semi-horizontal ventilation, longitudinal ventilation and combined ventilation. [0004] Natural ventilation is a ventilation method that uses the natural wind flow in the tunnel to exchange the air in the tunnel with the surface atmosphere to achieve the purpose of tunnel ventilation. This method is suitable for tunnel lengths...

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Problems solved by technology

[0010] The purpose of the present invention is to solve the unbalanced ventilation load on the left and right lines of the current extra-long highway tunnel. The traditional ventilation method needs to add ventilation vertical (inclined) shafts to the tunnels with a large air volume, while the tunnels with a small air volume have relatively large The problem that the air volume is not fully utilized

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