CN209799977U - Double-layer shield tunnel with upper and lower discharge flues - Google Patents
Double-layer shield tunnel with upper and lower discharge flues Download PDFInfo
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- CN209799977U CN209799977U CN201920079589.7U CN201920079589U CN209799977U CN 209799977 U CN209799977 U CN 209799977U CN 201920079589 U CN201920079589 U CN 201920079589U CN 209799977 U CN209799977 U CN 209799977U
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Abstract
The utility model discloses a double-deck shield tunnel with upper and lower layer discharge flue, including upper lane space (12) and lower floor lane space (13), the top of upper lane space (12) is equipped with top discharge flue (11), and one side in double-deck tunnel is equipped with evacuation passageway (5), the opposite side is equipped with lateral part discharge flue (14), top discharge flue (11) and the junction of upper lane space (12), the junction of lateral part discharge flue (14) and lower floor lane space (13) all is equipped with the smoke exhaust through-hole, be equipped with a plurality of contact wind channels (15) between top discharge flue (11) and lateral part discharge flue (14), contact wind channel (15) are crooked tubular structure, its one end and top discharge flue (11) intercommunication, the other end and lateral part discharge flue (14) intercommunication. The utility model discloses realize the intercommunication of two-layer discharge flue, improve smoke exhaust efficiency.
Description
Technical Field
The utility model belongs to the technical field of the discharge flue, more specifically relates to double-deck shield tunnel that has upper and lower layer discharge flue.
Background
With the development of urban underground space, large-diameter and long-distance shield tunnel is widely applied to the construction of urban expressway. For large-diameter and long-distance tunnels, traffic accidents and accidents such as fire disasters are easily caused in the tunnels due to the continuous increase of traffic volume and the increase of driving speed and density. Tunnel fires are often accompanied by the problems of high temperature, smoke suffocation, reduced visibility and the like, wherein the problem of suffocation of people caused by the fact that smoke cannot be timely separated and discharged is an important factor which causes difficulty in escape of people and difficulty in rescue implementation when external rescue enters. Because the inner space of the tunnel is relatively closed, the smoke exhaust path is limited, and how to effectively solve the smoke exhaust problem in a fire disaster becomes a key point for reducing casualties and property loss. The design rules of highway tunnel ventilation (JTG/TD70/2-02-2014) in China also clearly proposes: the expressway and the first-level highway tunnel with the length L larger than 1000m and the second, third and fourth-level highway tunnels with the length L larger than 2000m are provided with fire mechanical smoke prevention and discharge systems.
In the prior art, when a tunnel closed section is long, a key discharge flue is usually arranged above the tunnel to solve the problem of fire smoke discharge, but the discharge flue meeting the requirements is difficult to arrange due to the limitation of section arrangement of a double-layer shield tunnel. If set up the flue in the top, adopt upper and lower layer tunnel sharing top discharge flue mode, its shortcoming has: 1) the distance between the smoke outlet of the lower tunnel and the top flue is large, the section area of the smoke exhaust branch pipe is small, the width-to-height ratio is large, the wind flow resistance is large, and the airflow organization and the smoke exhaust effect are poor; 2) the smoke flowing direction of the lower lane is the same as the evacuation direction of people, people and smoke cannot be separated, and the influence on safety evacuation is large; 3) in order to meet the area requirement of the top flue, the height of the top flue is higher, so that the elevation of the upper and lower lanes needs to be moved downwards, the height of the bottom gallery is influenced, and the use of maintenance personnel in the operation period is not facilitated; 4) when tunnel length is great, the corresponding increase of wind speed in the flue, in order to guarantee tunnel exhaust effect, need divide into a plurality of sections of discharging fume with the extra long tunnel, need set up middle shaft of discharging fume, increased engineering occupation of land, the construction degree of difficulty and cost.
patent 201510640875.4 discloses a public railway sharing shield tunnel conflagration ventilation simulation experiment device that discharges fume, set up upper strata and concentrated smoke exhaust passage and lower floor's smoke exhaust passage, nevertheless upper strata is concentrated smoke exhaust passage and lower floor's smoke exhaust passage and is set up separately, and lower floor's smoke exhaust passage's cigarette can not directly communicate with the external world, need transmit from other passageway discharge behind the distance far away, consequently, lower floor's smoke exhaust passage's smoke exhaust effect is relatively poor.
Patent 200910062074.7 discloses a double-layer shield tunnel, in the space that forms between tunnel lining respectively through left partition wall and right partition wall in the tunnel both sides, one of them sets up the sparse stair that links upper and lower layer of traffic lane space, and another sets up the special wind channel of discharging fume that communicates with upper and lower layer of traffic lane space respectively. This patent adopts upper and lower layer tunnel sharing discharge flue mode, and upper tunnel exhaust port position is on the low side, and when the conflagration breaing out, smog is because of the high ascending of temperature, is unfavorable for harmful flue gas to discharge and personnel to evacuate.
SUMMERY OF THE UTILITY MODEL
To the above defect of prior art or improve the demand, the utility model provides a double-deck shield tunnel with lower floor's discharge flue adopts lateral part and the top in double-deck shield tunnel to set up lateral part discharge flue and top discharge flue respectively, is arranged in discharging the cigarette in lower floor's driving space and the upper strata driving space respectively, and the two through contact wind channel intercommunication, the intercommunication and the high efficiency of top discharge flue and lateral part discharge flue are realized in the contact wind channel that the interval set up are discharged fume.
In order to achieve the purpose, the utility model provides a double-layer shield tunnel with upper and lower discharge flue, which comprises an upper layer traffic lane space and a lower layer traffic lane space, wherein the top of the upper layer traffic lane space is provided with a top discharge flue, one side of the double-layer tunnel is provided with an evacuation stair and an evacuation channel, and the other side of the double-layer tunnel is provided with a side discharge flue;
The top exhaust flue and the upper-layer traffic lane space, the side exhaust flue and the lower-layer traffic lane space are respectively provided with an exhaust port so as to exhaust smoke in the upper-layer traffic lane space and the lower-layer traffic lane space;
A plurality of connecting air channels are arranged between the top discharge flue and the side discharge flue, the connecting air channels are of bent tubular structures and are arranged on the outer wall of the tunnel, one end of each connecting air channel is communicated with the top discharge flue, the other end of each connecting air channel is communicated with the side discharge flue, the top discharge flue and the side discharge flue are communicated, and therefore the smoke exhaust efficiency is improved.
Further, the air channel area of the single connecting air channel is larger than or equal to the area of the top discharge channel or the side discharge channel.
furthermore, the distance between the plurality of communication air channels is 1.0 km-1.5 km.
Preferably, the length of the connecting air duct is 25-50 m, and the actual length is determined according to the positions of the upper and lower smoke outlets and the smoke exhaust effect.
Further, the connection position of the communication air duct and the upper layer traffic lane space and the lower layer traffic lane space is positioned on different tunnel cross sections.
Furthermore, a smoke exhaust valve is arranged at the smoke exhaust port.
Generally, through the utility model discloses above technical scheme who conceives compares with prior art, can gain following beneficial effect:
(1) the utility model discloses double-deck shield tunnel with upper and lower layer discharge flue, the adoption sets up lateral part discharge flue and top discharge flue respectively at double-deck shield tunnel's lateral part and top, be arranged in discharging the cigarette in lower floor's driving space and the upper strata driving space respectively, contact wind channel setting through will communicateing top discharge flue and lateral part discharge flue is outside at the tunnel section, compare in the section with the setting, need not increase shield tunnel section and need not move down upper and lower lane elevation, it discharges fume jointly to have realized shield tunnel sectional economy and high efficiency through upper and lower layer discharge flue and discharge fume.
(2) The utility model discloses double-deck shield tunnel with lower floor's discharge flue, the area in single contact wind channel is more than or equal to the area of top discharge flue or lateral part discharge flue to it is unobstructed to discharge fume between top discharge flue and the lateral part discharge flue, and the discharge flue is discharged fume and is avoided the cigarette gathering in lower floor's lane space or upper strata lane space, causes the personnel to in time flee and leads to the casualties.
Drawings
FIG. 1 is a schematic cross-sectional view of a double-layer shield tunnel with upper and lower discharge ducts according to an embodiment of the present invention;
Fig. 2 is a schematic structural view of a communication air duct between two layers of discharge ducts in an embodiment of the present invention.
In all the figures, the same reference numerals denote the same features, in particular: 1-tunnel lining; 2-a left partition wall; 3-right partition wall; 4-a lane plate; 5-evacuation channels; 6-evacuation of stairs; 7-a pipeline corridor; 8-tunnel construction limits; 9-a smoke exhaust valve; 10-flue baffles; 11-top discharge flue; 12-upper level roadway space; 13-lower level traffic lane space; 14-side discharge flue; 15-connecting air duct.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
Fig. 1 is a schematic cross-sectional view of a double-layer shield tunnel with upper and lower discharge flues according to an embodiment of the present invention. As shown in figure 1, the double-layer shield tunnel of the utility model comprises a tunnel lining 1, a left partition wall 2, a right partition wall 3, a lane plate 4, an evacuation passage 5, evacuation stairs 6, a pipeline gallery 7 and a flue baffle 10, wherein the tunnel comprises two layers of lanes, namely an upper lane space 12 and a lower lane space 13, the lane plate 4 is arranged between the upper lane space 12 and the lower lane space 13, the tunnel is divided into an upper space and a lower space for driving through the lane plate 4, a top discharge flue 11 is arranged at the top of the upper lane space 12, the pipeline gallery 7 is arranged at the bottom of the lower lane space 13, the pipeline gallery 7 is used for laying the pipeline in the tunnel, the top discharge flue 11 is used as a special discharge flue of the upper lane space 12, a smoke discharge hole is arranged between the upper lane space 12 and the top discharge flue 11, and a smoke discharge fan is arranged at the smoke discharge hole, the smoke in the upper level roadway space 12 is drawn into the discharge flue 11 and discharged through the discharge flue.
Preferably, a smoke exhaust through hole 9 is arranged at the position of the smoke exhaust through hole between the upper-layer traffic lane space 12 and the top smoke exhaust channel 11, and the opening and the closing of the smoke exhaust through hole are controlled through the smoke exhaust valve 9. And a smoke exhaust fan is arranged at the top of the upper-layer traffic lane space 12 close to the smoke exhaust through hole so as to exhaust smoke in the upper-layer traffic lane space 12 into the top smoke exhaust channel 11.
preferably, a smoke evacuation through hole is provided between the lower roadway space 12 and the side exhaust flue 14, and a smoke evacuation valve is also provided at the smoke evacuation through hole to evacuate smoke in the lower roadway space 13 into the side exhaust flue 14.
the left partition wall 2 and the right partition wall 3 are arranged perpendicular to the flue partition plate and the lane plates 4 and are arranged on two sides of the tunnel to separate the tunnel into independent spaces on two sides, the side discharge flue 14, the evacuation stairs 6 and the evacuation channel 5 are respectively arranged in the independent spaces on two sides, the evacuation stairs 6 are arranged between the lower-layer lane space 13 and the upper-layer lane space 12, the bottom of the evacuation stairs 6 is communicated with the lower-layer lane space 13, and personnel in the lower-layer lane space 13 enter the upper-layer lane space from the evacuation stairs 6; an evacuation passageway 5 is provided at the top of the evacuation stairway 6, through the evacuation passageway 5 to the safe area.
The side discharge flue 14 is arranged at the opposite side of the evacuation stairs 6 and the evacuation channel 5 to avoid the same flow direction of the flue gas as the evacuation direction of people, and ensure the evacuation safety of people.
Fig. 2 is a schematic structural view of a communication air duct between two layers of discharge ducts in an embodiment of the present invention. As shown in fig. 2, a plurality of communicating air ducts 15 are arranged between the top exhaust duct 11 and the side exhaust duct 14, so that during a fire, the double flue is used for simultaneously discharging smoke from the fire tunnel, and the top exhaust duct 11 and the side exhaust duct 14 are communicated through the communicating air ducts 15, so that the connection of the exhaust ducts between the lower-layer traffic lane space 13 and the upper-layer traffic lane space 12 is realized, the smoke in the lower layer can be smoothly discharged, the smoke discharging efficiency is improved, and particularly the smoke discharging efficiency of the lower-layer traffic lane space 13 is improved. The sum of the air duct areas of the plurality of connecting air ducts 15 is larger than or equal to the area of the top discharge duct 11 or the area of the side discharge duct 14, so that the circulation between the top discharge duct 11 and the side discharge duct 14 is smooth, and the situation that smoke in the side discharge duct 14 cannot be timely discharged into the top discharge duct 11 or smoke in the top discharge duct 11 cannot be timely discharged into the side discharge duct due to the restriction of the air duct areas of the connecting air ducts 15 is avoided, so that the smoke is gathered in the lower-layer traffic lane space 13 or the upper-layer traffic lane space 12, and personnel cannot timely escape to cause casualties is avoided.
One end of the connecting air duct 15 is communicated with the top discharge duct 11, the other end is communicated with the side discharge duct 14, the connecting air duct 15 is of a bent tubular structure and is arranged outside the tunnel, and the two ends of the connecting air duct are connected with tunnel pipe pieces. Preferably, the connection between the connection air duct 15 and the upper lane space 12 and the connection between the connection air duct and the lower lane space 13 are located on different cross sections of the tunnel, and the connection air duct 15 is long, so that the side discharge flue 14 and the top discharge flue are conveniently communicated, and the smoke discharge effect is improved.
Preferably, in the outside country rock in tunnel is located to contact wind channel 15, avoid occupying the inside region in tunnel, reduce the cross section and arrange the restriction to its area to further improve smoke extraction efficiency.
The number and the spacing of the connecting air ducts 15 are determined according to the length of the smoke exhaust section and the area of the upper and lower smoke exhaust ducts. Preferably, the distance between the connecting air ducts 15 is 1.0km to 1.5km, and if the distance is too long, smoke in a long range of the side smoke exhaust channel 14 is gathered at one position, which is not beneficial to be exhausted into the top smoke exhaust channel 11, and the difficulty of exhausting the smoke in the side smoke exhaust channel 14 into the top smoke exhaust channel 11 through the connecting air ducts 15 is increased, so that the efficiency is low; the distance is too short, the engineering construction amount is large, and 1.0 km-1.5 km ensures high-efficiency smoke discharge between the top smoke discharge channel 11 and the side smoke discharge channel 14 on the basis of proper construction amount.
The length of the connecting air duct 15 is preferably 25 m-50 m, and if the length of the connecting air duct 15 is too long, the smoke exhaust air speed needs to be increased, and the power of smoke exhaust equipment is too large; if the length of the connecting duct 15 is too short, the effective length of the smoke discharge is reduced and the effect of the smoke discharge at a distance is poor
the total area of the top discharge flue 11 and the side discharge flue 14 is the total area of the discharge flue, and is determined according to the discharge capacity standard under the fire condition, and the areas of the top discharge flue 11 and the side discharge flue 14 are both 60% -70% of the total area of the discharge flue, so that the possible air leakage problem of the discharge flue and the wind resistance problem of a communication flue are solved, the smoke in the space of an upper lane and a lower lane in a tunnel can be discharged in time by the two layers of discharge flues, and the smoke can be discharged from the fire tunnel by the double flues at the side and the top under the fire condition on the premise of not increasing the section of the shield tunnel and not moving the elevation of the upper lane and the lower lane, so that the smoke discharge efficiency is improved; and because the double flues simultaneously discharge smoke, the smoke discharge air speed can be reduced, the length of the smoke discharge segment is enlarged, and the number of smoke discharge vertical shafts is reduced.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the scope of the present invention.
Claims (6)
1. The double-layer shield tunnel with the upper-layer discharge flue and the lower-layer discharge flue comprises an upper-layer traffic lane space (12) and a lower-layer traffic lane space (13), wherein a top discharge flue (11) is arranged at the top of the upper-layer traffic lane space (12), and one side of the double-layer tunnel is provided with an evacuation stair (6) and an evacuation channel (5), and is characterized in that a side discharge flue (14) is arranged at the other side of the double-layer tunnel;
Smoke exhaust through holes are formed in the joint of the top exhaust flue (11) and the upper-layer traffic lane space (12) and the joint of the side exhaust flue (14) and the lower-layer traffic lane space (13) respectively, so that smoke in the upper-layer traffic lane space (12) and smoke in the lower-layer traffic lane space (13) are exhausted;
A plurality of connecting air channels (15) are arranged between the top discharge channel (11) and the side discharge channel (14), the connecting air channels (15) are arranged on the outer wall of the tunnel and are of a bent tubular structure, one end of each connecting air channel is communicated with the top discharge channel (11), the other end of each connecting air channel is communicated with the side discharge channel (14), the top discharge channel (11) and the side discharge channel (14) are communicated, and smoke exhaust efficiency is improved.
2. The double-deck shield tunnel with upper and lower exit flue of claim 1, characterized in that the sum of the flue areas of several communicating flues (15) is greater than or equal to the area of the top exit flue (11) or the side exit flue (14).
3. The double-layer shield tunnel with upper and lower discharge flues of claim 2, wherein the distance between the plurality of connecting flues (15) is 1.0 km-1.5 km.
4. The double-layer shield tunnel with upper and lower discharge flues according to any of claims 1 to 3, wherein the length of the connecting flue (15) is 25m to 50 m.
5. The double shield tunnel with upper and lower exit flues according to claim 1, characterised in that the connection of the connecting flue (15) to the upper (12) and lower (13) roadway spaces is located on different tunnel cross sections.
6. The double-deck shield tunnel with upper and lower smoke ducts of claim 1, wherein a smoke evacuation valve is provided at said smoke evacuation through-hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920079589.7U CN209799977U (en) | 2019-01-17 | 2019-01-17 | Double-layer shield tunnel with upper and lower discharge flues |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920079589.7U CN209799977U (en) | 2019-01-17 | 2019-01-17 | Double-layer shield tunnel with upper and lower discharge flues |
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| CN209799977U true CN209799977U (en) | 2019-12-17 |
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| CN201920079589.7U Active CN209799977U (en) | 2019-01-17 | 2019-01-17 | Double-layer shield tunnel with upper and lower discharge flues |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109707395A (en) * | 2019-01-17 | 2019-05-03 | 中铁第四勘察设计院集团有限公司 | Double-layer shield tunnel and smokejack setting method with upper and lower level smokejack |
| CN113279771A (en) * | 2021-06-22 | 2021-08-20 | 中建交通建设集团有限公司 | Prevent prefabricated assembled structure of shield tunnel section of jurisdiction come-up under water |
-
2019
- 2019-01-17 CN CN201920079589.7U patent/CN209799977U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109707395A (en) * | 2019-01-17 | 2019-05-03 | 中铁第四勘察设计院集团有限公司 | Double-layer shield tunnel and smokejack setting method with upper and lower level smokejack |
| CN109707395B (en) * | 2019-01-17 | 2024-01-16 | 中铁第四勘察设计院集团有限公司 | Double-layer shield tunnel with upper and lower layer discharge flues and discharge flue setting method |
| CN113279771A (en) * | 2021-06-22 | 2021-08-20 | 中建交通建设集团有限公司 | Prevent prefabricated assembled structure of shield tunnel section of jurisdiction come-up under water |
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