RU2013110767A - METHOD AND SYSTEM OF UNIVERSAL PROTECTION OF OPEN OPENINGS OF TWO-WAY TUNNELS OF METRO - Google Patents

Abstract

1. The method of universal protection of open two-tunnel underground openings, including the formation of a forced air curtain with several degrees of protection, characterized in that the protection is carried out by four degrees of protection using the additional effect of their combined action and their combination, the first degree of protection is formed at the exit of the tunnel, perform with a lateral bilateral supply of a flat jet of cold air with an intensity of W1 m / s, at an angle, the second degree of protection is formed at a distance Lp, m from cold jet, perform with a three-way supply of a flat jet of warm air, intensity W2 m / s, at an angle, the third degree of protection is formed at a distance Ln, m from the flat cold jet, perform the supply of warm air with a flat warm jet with an intensity of W3 m / s, at an angle β °, the fourth degree of protection is formed at a distance Lk, m from a flat cold jet, by natural air bypass of intensity W4 = f (Vcp) with a jet turning angle γ °, through openings in the wall dividing the double-track tunnel into a “warm tunnel” ”And“ cold tunnel ”, where Vcp is the average speed of a moving train. 2. The method according to claim 1, characterized in that the first degree of protection is forcibly formed directly in front of itself at the exit of the tunnel, with local air intake, with an intensity of W1 = (6-18) m / s, at an angle α = (20-40) °; the second degree of protection is formed forcefully from the sides and from the top of the tunnel at a distance Lp = (5-15) m, intensity W2 = (6-18) m / s, at an angle α = (20-40) °; the third degree of protection is forcibly formed at a distance Ln = (10-30) m, performed by applying a warming jet along the walls of the “cold”

Claims (4)

1. The method of universal protection of open two-tunnel subway openings, including the formation of a forced air curtain with several degrees of protection, characterized in that protection is carried out by four degrees of protection using the additional effect of their combined action and their combination, the first degree of protection is formed at the exit of the tunnel, performed with a lateral two-sided supply of a flat stream of cold air with intensity W1 m / s, at an angle $${\alpha }_0^{\circ }$$

, the second degree of protection is formed at a distance Lp, m from a flat cold jet, performed with a three-way supply of a flat jet of warm air, intensity W2 m / s, at an angle $${\alpha }_p^{\circ }$$

, the third degree of protection is formed at a distance Ln, m from the flat cold stream, is supplied by warm air with a warming jet of intensity W3 m / s, at an angle β °, the fourth degree of protection is formed at a distance Lk, m from the flat cold stream, by air by intensity W4 = f (Vcp) with a jet turning angle γ °, through the openings in the wall dividing the double-track tunnel into a “warm tunnel” and a “cold tunnel”, where Vcp is the average speed of a moving train. 2. The method according to claim 1, characterized in that the first degree of protection is forcibly formed directly in front of itself at the exit of the tunnel, with local air intake, with intensity W1 = (6-18) m / s, at an angle α ₀ = (20 -40) °; the second degree of protection is formed forcefully from the sides and from the top of the tunnel at a distance Lp = (5-15) m, intensity W2 = (6-18) m / s, at an angle α _p = (20-40) °; the third degree of protection is formed forcefully at a distance of Ln = (10-30) m, performed by applying a warming jet along the walls of the “cold” tunnel with an intensity of W3 = (6-18) m / s, at an angle β = (0-10) ° ; the fourth degree of protection is formed by natural air bypass at a distance Lk = (20-40) m, intensity W4 = (2-24) m / s, with a jet turning angle γ = (90-135) °, through holes in the wall separating the double-track the tunnel to the “warm tunnel” and “cold tunnel” at a distance l = (150-200) m. 3. A system of universal protection devices for open two-tunnel underground openings, including a system of devices for forming curtains with a main fan, characterized in that the system includes: slotted elements of ducts for forming flat air jets, a radial fan in the housing integrated into the curtain structure and taking away air for the formation of a forced jet of the first degree of protection directly in front of the tunnel, placed above the tunnel by a ventilation chamber and a prechamber, connected by section air ducts with slotted elements of the second and third degrees of protection, ventilation ducts for the formation of forced flows of warm air, special through holes in the partition between the “warm” and “cold” tunnels to bypass air from one tunnel to another when a piston technological effect occurs and mixing warm with part of the cold air when moving trains near the opening. 4. The device system according to claim 3, characterized in that slotted elements are made in height h_i, m equal to the height of the open opening and width b_i= 0.2 m; the prechamber is connected by separate duct channels with slotted elements, ducts of circular cross section with a diameter from Dn = 920 mm to Dn = 1420 mm, which are subsequently poured with concrete; radial fan built into the curtain structure, taking air to form a forced jet, directly in front of itself from the tunnel, with a capacity of L₂= 210,000 m³/ h, motor power N_one= 11 kW, through holes made of rectangular cross-section in the amount of 8 pcs., Each with a width of b₃= 0.4 m and height h₃equal to the height of the tunnel, with a rotation angle γ = (90-135) °, in the partition dividing the double-track tunnel into a "warm tunnel" and a "cold tunnel" at a distance l = 150 m.