CN110094231B - Structure for preventing and reducing damage of detention air mass of deep regulation tunnel - Google Patents
Structure for preventing and reducing damage of detention air mass of deep regulation tunnel Download PDFInfo
- Publication number
- CN110094231B CN110094231B CN201910268280.7A CN201910268280A CN110094231B CN 110094231 B CN110094231 B CN 110094231B CN 201910268280 A CN201910268280 A CN 201910268280A CN 110094231 B CN110094231 B CN 110094231B
- Authority
- CN
- China
- Prior art keywords
- deep
- tunnel
- fence type
- baffle
- type baffle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000033228 biological regulation Effects 0.000 title claims abstract description 18
- 230000006378 damage Effects 0.000 title claims abstract description 16
- 230000000712 assembly Effects 0.000 claims abstract description 9
- 238000000429 assembly Methods 0.000 claims abstract description 9
- 230000004888 barrier function Effects 0.000 claims description 20
- 230000000717 retained effect Effects 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims 1
- 230000005641 tunneling Effects 0.000 abstract description 7
- 230000000903 blocking effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 230000014759 maintenance of location Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 230000033001 locomotion Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
Abstract
The invention discloses a structure for preventing and reducing the harm of air retention clusters in a deep regulation tunnel, which comprises a plurality of baffle assemblies arranged at intervals along the axial direction of the top wall of the deep tunnel; the baffle assemblies are arranged at the top of the deep tunnel wall, and each baffle assembly comprises a first fence type baffle and a second fence type baffle; each fence type baffle is perpendicular to the axial direction of the tunnel and comprises a plurality of parallel grid bars and flow channels positioned between the grid bars; the first grid bars and the second grid bars are arranged in a staggered mode along the deep tunneling axial direction to play a role in blocking flow of moving gas. According to the invention, the baffle plate assembly arranged at the top of the deep regulation tunnel can play a role in circulating and decelerating the moving air mass so as to reduce the impact pressure of the stagnant air mass, and can divide the air mass at the top of the deep tunnel into small air masses so as to avoid forming a harmful large-volume stagnant air mass, so that the effect of preventing and reducing the harm of the stagnant air mass of the deep regulation tunnel is finally achieved by combining the two aspects.
Description
Technical Field
The invention relates to a municipal deep tunnel engineering device, in particular to a structure for preventing and reducing the harm of air retention clusters in a deep regulation tunnel.
Background
The deep tunnel drainage system is used as an important means for coping with waterlogging, and gradually applied to urban drainage planning by virtue of the advantages of the deep tunnel drainage system, for example, the deep tunnel engineering is designed and built in Guangzhou cities, shanghai cities and the like.
The deep tunnel drainage system consists of an inflow vertical shaft, a deep tunnel, a drainage pump group and the like. In the operation process of the deep tunnel regulation project, on one hand, gas exists in the main tunnel, and on the other hand, the rain sewage carries the gas and is converged into the deep tunnel through the vertical shaft. Due to the long distance arrangement of the deep tunnels and the high and low fluctuation of the deep tunnel arrangement route, some gas is trapped in the deep tunnels to form a detention gas mass. The detention air mass occupies a certain space in the whole deep tunnel, when hydraulic transient occurs when a drainage pump is started suddenly, the phenomenon that pressurized water flow impacts the detention air mass in the deep tunnel inevitably occurs in the deep tunnel, so that the volume of the detention air mass is rapidly compressed in a very short time to generate great impact pressure, the damage to the tunnel inner wall structure caused by the deep tunnel overflow is slightly influenced, and the safety accident of the urban deep tunnel drainage system is probably caused by 'air explosion'. However, deep tunnel drainage systems are a new urban drainage system and are generally built several tens of meters underground, and the deep tunnel length between two inflow shafts is generally above 1km, making the implementation of prior art measures to provide ventilation holes or air valves at easy gas collection locations above the main tunnel too costly to be viable. The first prior art provides the baffle passageway of vertical setting on deep tunnel roof, cuts apart the atmospheric mass into little air mass with this baffle passageway and solves the violent exhaust problem of inflow shaft department, but still can form the air current passageway between the baffle passageway in this structure, can not effectively reduce the velocity of motion of air mass to can not solve the inside detention air mass harm problem of deep tunnel main part. However, the harm of the stagnant air mass in the deep regulation tunnel cannot be ignored, so measures are necessary to prevent and reduce the harm caused by the stagnant air mass in the deep regulation tunnel.
Disclosure of Invention
The invention aims to: in order to overcome the problems and the defects in the background art, the invention provides a structure for preventing and reducing the harm of air pockets retained in a deep regulation tunnel.
The technical scheme is as follows: the invention provides a structure for preventing and reducing the harm of air pockets in a deep regulation tunnel, which comprises a plurality of baffle assemblies arranged at intervals along the axial direction of the deep tunnel; each baffle assembly is arranged at the top of the deep tunnel wall and at least comprises a first fence type baffle; the first fence type baffle is perpendicular to the axial direction of the tunnel and comprises a plurality of first grid bars which are arranged in parallel and first flow channels which are arranged among the first grid bars.
The baffle assembly at least comprises a second fence type baffle which is perpendicular to the axial direction of the deep tunnel and comprises a plurality of second grid bars which are arranged in parallel and second flow channels which are arranged among the second grid bars, and the first grid bars and the second grid bars are arranged in a staggered mode; the width of each first grid bar and/or the width of each second grid bar are the same or different, the width of each first runner and/or the width of each second runner are the same or different, the width of the opposite first runner is smaller than the width of the second grid bar, and the width of the opposite second runner is smaller than the width of the first grid bar.
The bottom ends of a plurality of first bars of the first fence type baffle are flush, and the bottom ends of a plurality of second bars of the second fence type baffle are flush.
The width of the first grid bars and/or the second grid bars is 1/10-1/8 of the diameter of the deep tunnel.
The first fence type baffle and/or the second fence type baffle are/is of an arch structure as a whole, and the height of the first fence type baffle and/or the second fence type baffle is 1/5-1/4 of the diameter of the deep tunnel pipe.
The width of the first flow channel and/or the second flow channel is 1/20-1/16 of the deep tunneling pipe diameter.
The axial distance between the first fence type baffle and the second fence type baffle is 1/4-1/2 of the deep tunnel pipe diameter.
The arc radian of the first fence type baffle and/or the second fence type baffle is matched with the radian of the deep tunnel pipe wall.
The second grating type baffle plate and the first grating type baffle plate are the same in height, and the width of second grating strips of the second grating type baffle plate and the width of second flow channels are matched with the first grating type baffle plate.
The beneficial effects are that: (1) When the water body impacts the detention air mass, the movement speed of the air mass can be reduced due to the bypass flow decelerating effect of the fence type baffle assembly, and the impact pressure formed by the detention air mass can be slowed down, so that the influence of the detention air mass on the deep tunneling structure is relieved; (2) According to the invention, under the condition that the normal overflow capacity of the water body in the deep tunnel is not affected, the air mass at the top of the deep tunnel can be divided into small air masses, so that the small air masses are more easily taken away by water flow at a higher speed and are discharged from a downstream inflow vertical shaft under the action of buoyancy, and thus, the formation of harmful large-volume retention air masses is avoided.
Drawings
FIG. 1 is a schematic three-dimensional view of a deep tunneling structure according to the present invention;
FIG. 2 is a schematic cross-sectional view of a first barrier structure in deep tunneling according to the present invention;
FIG. 3 is a schematic cross-sectional view of a second barrier structure in deep tunnels according to the present invention;
FIG. 4 is a schematic vertical section of a deep tunnel inner structure according to the present invention;
fig. 5 is a bottom view of the deep tunneling structure of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention. The axial direction in the present invention is the direction of the Z-axis in fig. 1, the height direction in the present invention is the direction along the Y-axis in fig. 1, and the width direction in the present invention is the direction along the X-axis in fig. 1.
As shown in fig. 1, the structure for preventing and reducing the damage of the detention air mass of the deep regulation tunnel disclosed by the invention is composed of a plurality of baffle assemblies 1 vertically arranged at the top of the pipe wall of the deep tunnel 2, and the baffle assemblies 1 are arranged at the top of the deep tunnel 2 for the bypass flow speed reduction of the movement air mass and crushing the air mass at the top of the deep tunnel due to the fact that the density of the gas is small compared with the density of a water body.
Each baffle assembly 1 consists of a plurality of fence type baffles, the baffle assemblies 1 are distributed at intervals along the axial direction of the deep tunnel 2, the baffle assemblies 1 consist of a plurality of fence type baffles, and in the embodiment, the baffle assemblies 1 consist of a first fence type baffle 11 and a second fence type baffle 12 which are matched; as shown in fig. 1, a first barrier type baffle 11 and a second barrier type baffle 12 are vertically disposed at the top of the deep tunnel pipe; as shown in fig. 2, the first barrier 11 is composed of a plurality of first bars 111 arranged in parallel and first flow channels 112 between the first bars; as shown in fig. 3, the second barrier type baffle 12 is composed of a plurality of second bars 121 arranged in parallel and second flow channels 122 between the second bars; the first fence type baffle 11 and the second fence type baffle 12 are of arch structures, the arch radian of the fence type baffle is matched with the radian of the wall of the deep tunnel, the heights of the grids forming the fence type baffle are gradually reduced from the middle to the two sides, the bottoms of the grids are flush, the distance from the top end to the bottom end of the first fence type baffle 11 to the bottom end of the second fence type baffle 12 is 1/5-1/4 of the deep tunnel diameter, the flow velocity of gas passing through the vicinity of the baffles can be reduced, and meanwhile, the normal flow capacity of a water body in the deep tunnel is not influenced.
The dimensions of the first barrier baffle 11 and the second barrier baffle 12 may be the same or different, and the widths of the first barrier strips 111 and the second barrier strips 121 in this embodiment are 1/10-1/8 of the deep tunnel pipe diameter, so that the barrier strips have a certain flow blocking effect on the moving air mass, and the widths of the first flow channel 112 and the second flow channel 122 along the X-axis direction in fig. 1 are 1/20-1/16 of the deep tunnel pipe diameter, so that the moving air can pass around the flow for deceleration when passing through the barrier strips.
The axial distance between the first fence type baffle and the second fence type baffle is 1/4-1/2 of the diameter of a deep tunnel, the first fence type baffle and the second fence type baffle are arranged in a staggered mode, namely, the first fence type baffle 11 is provided with first grids 111 at the middle part, the second fence type baffle 12 is provided with second flow channels 122 at the middle part, and the second grids are sequentially arranged at two sides of the second flow channels, so that the first grids of the adjacent first fence type baffles are opposite to the second flow channels, the first flow channels are opposite to the second grid, the width of the first flow channels opposite to the second grid is smaller than the width of the second grid, and the width of the opposite second flow channels is smaller than the width of the first grid; in general, the number of the grid bars of the second grid type baffle plate is different from that of the first grid type baffle plate, so that gas is not easy to form an unobstructed gas channel at the top of a deep tunnel, and when water body impacts a stagnant air mass, the flow blocking effect of the grid type baffle plate structure on gas movement is enhanced.
The thickness dimension of the fence type baffle plate adopted in the invention is smaller than the height dimension and the width dimension of the fence type strips, and the thickness dimension can be properly reduced to reduce the economic cost on the basis of meeting the structural stability.
The invention reduces the movement speed of the gas by the flow-around deceleration principle of the barrier so as to reduce the impact pressure of the air mass. Firstly, the motion speed of the air mass can be reduced by using the flow blocking effect of the fence type baffle plate, the impact pressure formed by the retained air mass is reduced, secondly, on the premise of not influencing the speed of water flow, the air mass is divided into small air masses, compared with the air masses, the viscous resistance suffered by air bubbles and the small air masses is much smaller than the buoyancy, the viscous resistance can be taken away by the water flow at a higher speed and discharged from a downstream inflow vertical shaft under the action of the buoyancy, thereby avoiding the formation of a harmful large-volume retained air mass, reducing the adverse effect of the retained air mass on a deep tunneling structure, and achieving the effect of preventing and reducing the harm of the retained air mass of a deep regulation tunnel.
Claims (6)
1. The utility model provides a structure that prevention and reduction deep regulation tunnel detained air mass harm, its characterized in that: a plurality of baffle assemblies (1) are axially arranged along the top wall of the deep tunnel at intervals, each baffle assembly (1) is arranged at the top of the wall of the deep tunnel, and each baffle assembly at least comprises a first fence type baffle (11); the first fence type baffle (11) is perpendicular to the axial direction of the tunnel and comprises a plurality of first grid bars (111) which are arranged in parallel and first flow channels (112) which are positioned between the first grid bars;
the baffle assembly (1) further comprises at least one second fence type baffle (12), the second fence type baffle (12) is perpendicular to the axial direction of the deep tunnel and comprises a plurality of second grid bars (121) which are arranged in parallel and second flow channels (122) which are arranged among the second grid bars, and the first grid bars and the second grid bars are arranged in a staggered mode; the width of each first grid bar and/or the width of each second grid bar are the same or different, the width of each first runner and/or the width of each second runner are the same or different, the width of the opposite first runner is smaller than the width of the second grid bar, and the width of the opposite second runner is smaller than the width of the first grid bar;
the first fence type baffle and/or the second fence type baffle are/is of an arch structure as a whole, and the height of the first fence type baffle and/or the second fence type baffle is 1/5-1/4 of the diameter of a deep tunnel; the arc radian of the first fence type baffle and/or the second fence type baffle is matched with the radian of the deep tunnel pipe wall.
2. The structure for preventing and reducing the risk of air pockets in deep regulation tunnels according to claim 1, wherein the bottom ends of the first bars (111) of the first barrier type (11) are flush, and the bottom ends of the second bars (121) of the second barrier type (12) are flush.
3. The structure for preventing and reducing the damage of the reserved air mass of the deep regulation tunnel according to claim 2, wherein the width of the first grid bars and/or the second grid bars is 1/10-1/8 of the diameter of the deep tunnel.
4. The structure for preventing and reducing the risk of air pockets retained in a deep storage tunnel according to claim 1, wherein the width of the first runner (112) and/or the second runner (122) is 1/20-1/16 of the diameter of the deep tunnel.
5. The structure for preventing and reducing the damage of the reserved air mass of the deep regulation tunnel according to claim 1, wherein the axial distance between the first fence type baffle (11) and the second fence type baffle (12) is 1/4-1/2 of the diameter of the deep tunnel.
6. The structure for preventing and reducing the risk of air pockets in deep regulation tunnels according to claim 1, wherein the second barrier is the same height as the first barrier, and the second barrier has a second barrier width and a second flow channel width matched with the first barrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910268280.7A CN110094231B (en) | 2019-04-03 | 2019-04-03 | Structure for preventing and reducing damage of detention air mass of deep regulation tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910268280.7A CN110094231B (en) | 2019-04-03 | 2019-04-03 | Structure for preventing and reducing damage of detention air mass of deep regulation tunnel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110094231A CN110094231A (en) | 2019-08-06 |
| CN110094231B true CN110094231B (en) | 2024-02-23 |
Family
ID=67444329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910268280.7A Active CN110094231B (en) | 2019-04-03 | 2019-04-03 | Structure for preventing and reducing damage of detention air mass of deep regulation tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110094231B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111926898B (en) * | 2020-08-25 | 2021-09-03 | 河海大学 | Add regulation tunnel system well tunnel linking structure of flow distribution plate device |
| CN114837142B (en) * | 2022-05-19 | 2023-08-15 | 浙江省水利河口研究院(浙江省海洋规划设计研究院) | Structure for reducing air explosion damage of cave depot |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2456063A1 (en) * | 1974-11-27 | 1975-06-26 | ||
| DE2930464A1 (en) * | 1979-07-27 | 1981-02-05 | Bayer Ag | Automatic odour or noxious vapour lock - comprises foldable flexible tube joined to pipe walling by gas-tight seam |
| JPH0780334A (en) * | 1993-09-16 | 1995-03-28 | N K K Plant Kensetsu Kk | Device for preventing explosion of big refuge crusher |
| CN1942653A (en) * | 2003-11-07 | 2007-04-04 | 国际壳牌研究有限公司 | Bubble breaker assembly |
| CN202520352U (en) * | 2012-03-06 | 2012-11-07 | 中铁二十二局集团第五工程有限公司 | Large-cross section gas outburst tunnel ventilating system |
| CN204327113U (en) * | 2014-12-15 | 2015-05-13 | 中铁第四勘察设计院集团有限公司 | Railway tunnel Internal baffle type buffer structure |
| CN105909204A (en) * | 2016-05-30 | 2016-08-31 | 邓海波 | Paraffin-prevention and viscosity-reduction rectifier of oil field flowing well |
| CN108252390A (en) * | 2018-01-10 | 2018-07-06 | 河海大学 | A kind of reduction city deep layer drainage system gas explosion intensity enters flow through shaft |
| CN108316940A (en) * | 2018-01-10 | 2018-07-24 | 河海大学 | For alleviating the pipeline and enter flow through shaft connected structure that deep tunnel trapped air mass is discharged |
-
2019
- 2019-04-03 CN CN201910268280.7A patent/CN110094231B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2456063A1 (en) * | 1974-11-27 | 1975-06-26 | ||
| DE2930464A1 (en) * | 1979-07-27 | 1981-02-05 | Bayer Ag | Automatic odour or noxious vapour lock - comprises foldable flexible tube joined to pipe walling by gas-tight seam |
| JPH0780334A (en) * | 1993-09-16 | 1995-03-28 | N K K Plant Kensetsu Kk | Device for preventing explosion of big refuge crusher |
| CN1942653A (en) * | 2003-11-07 | 2007-04-04 | 国际壳牌研究有限公司 | Bubble breaker assembly |
| CN202520352U (en) * | 2012-03-06 | 2012-11-07 | 中铁二十二局集团第五工程有限公司 | Large-cross section gas outburst tunnel ventilating system |
| CN204327113U (en) * | 2014-12-15 | 2015-05-13 | 中铁第四勘察设计院集团有限公司 | Railway tunnel Internal baffle type buffer structure |
| CN105909204A (en) * | 2016-05-30 | 2016-08-31 | 邓海波 | Paraffin-prevention and viscosity-reduction rectifier of oil field flowing well |
| CN108252390A (en) * | 2018-01-10 | 2018-07-06 | 河海大学 | A kind of reduction city deep layer drainage system gas explosion intensity enters flow through shaft |
| CN108316940A (en) * | 2018-01-10 | 2018-07-24 | 河海大学 | For alleviating the pipeline and enter flow through shaft connected structure that deep tunnel trapped air mass is discharged |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110094231A (en) | 2019-08-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10202731B2 (en) | Method for planning and designing debris flow drainage channels and applications thereof | |
| CN110094231B (en) | Structure for preventing and reducing damage of detention air mass of deep regulation tunnel | |
| CN101886374B (en) | Groove bottom-reinforced fully lined debris flow drainage groove and construction method thereof | |
| CN103088791B (en) | Energy dissipation type debris flow check dam combined draining and guiding and blocking | |
| CN108330871B (en) | Design method of debris flow channel bridge pier protection device | |
| CN101476305A (en) | Mud-stone flow discharge guiding groove based on step anti-flushing notched sill group and use thereof | |
| CN203188185U (en) | United energy dissipation structure under ultralow Froude number | |
| JP4137832B2 (en) | Derating structure and discharge path used for it | |
| CN104863098A (en) | Danger-elimination refitting method for stilling pool downstream energy dissipater | |
| CN106012710A (en) | Fence structure, wind-brown sand treatment facility and roadbed system | |
| Zhang et al. | Optimization on energy saving ventilation of gallery-type combined construction shaft exhaust in extra long tunnel | |
| CN108104074B (en) | Method and device for reducing damage of landslide surge to dam | |
| CN203247553U (en) | Flap-door lock chamber structure | |
| CN205934877U (en) | Diversion tunnel's collection stone hole structure | |
| CN110080182B (en) | Diversion tunnel plug energy dissipation structure and arrangement method thereof | |
| CN109594533B (en) | Vortex chamber stilling pool | |
| CN113047905A (en) | Novel drainage and smoke exhaust system suitable for extra-long tunnel of water-rich stratum | |
| CN207193875U (en) | A kind of debris flow drainage groove for increasing resistance based on section | |
| CN108533314B (en) | Mine goaf sealing method and application system thereof | |
| CN218969933U (en) | Multi-stage bypass type horizontal pressurizing device for emptying plane gate | |
| CN111350376A (en) | Steel construction anti-collapse canopy frame of people's air defense access & exit motor way | |
| CN211646049U (en) | Outlet structure for high retaining wall culvert | |
| CN211622759U (en) | Steel construction anti-collapse canopy frame of people's air defense access & exit motor way | |
| CN215976913U (en) | EASC system is with high vertical board sand barrier | |
| CN218667829U (en) | Drainage well group and flood drainage system for tailing pond |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |