CN220522630U - Be applied to drainage structures of non-excavation formula long interval utility tunnel - Google Patents
Be applied to drainage structures of non-excavation formula long interval utility tunnel Download PDFInfo
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- CN220522630U CN220522630U CN202322276325.XU CN202322276325U CN220522630U CN 220522630 U CN220522630 U CN 220522630U CN 202322276325 U CN202322276325 U CN 202322276325U CN 220522630 U CN220522630 U CN 220522630U
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- supply system
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- 238000009412 basement excavation Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 87
- 238000007689 inspection Methods 0.000 claims abstract description 60
- 230000004888 barrier function Effects 0.000 claims abstract description 20
- 239000000779 smoke Substances 0.000 claims abstract description 10
- 230000007480 spreading Effects 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 238000000926 separation method Methods 0.000 claims description 10
- 239000013049 sediment Substances 0.000 claims description 8
- 230000002265 prevention Effects 0.000 claims description 5
- 238000009825 accumulation Methods 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 abstract description 7
- 238000009792 diffusion process Methods 0.000 abstract 1
- 230000006872 improvement Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 230000005465 channeling Effects 0.000 description 3
- 230000008021 deposition Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Abstract
The utility model relates to a drainage structure of a comprehensive pipe rack, in particular to a drainage structure applied to a non-excavation long-interval comprehensive pipe rack, which comprises a comprehensive pipe rack body, a fireproof barrier, a plain concrete cushion layer, a drainage side ditch and a converging ditch, wherein the drainage structure comprises a main pipe rack body, a fireproof barrier, a plain concrete cushion layer and a drainage side ditch; the two sides of the fireproof barrier are provided with inspection wells, each inspection well comprises an inspection well cover and an inspection well chamber, and the drainage side ditches are arranged at two sides of the comprehensive pipe gallery body; the converging channel is arranged in the inspection well chamber, and the drainage side channel is connected with the inspection well chamber through the converging channel; a drainage blind ditch is arranged in the plain concrete cushion layer below the fireproof barrier, and inspection well chambers on two sides of the fireproof barrier are connected through the drainage blind ditch; the automatic water supply system is arranged at the converging ditch and is connected with the fire control system in the comprehensive pipe rack. Under the fire working condition, the utility model can realize the submerged sealing of the drainage blind ditch by injecting water into the inspection well, thereby effectively blocking the spreading and diffusion of high-temperature smoke and fire to adjacent fireproof subareas; under the non-fire working condition, the smooth drainage among the functional node wells can be ensured.
Description
Technical Field
The utility model relates to a drainage structure of a utility tunnel, in particular to a drainage structure applied to a non-excavation long-interval utility tunnel.
Background
The non-excavation type long-interval comprehensive pipe rack is constructed by adopting a non-excavation technology (such as a shield method, a pipe jacking method, a mine method and the like), and the interval length (the interval length refers to the continuous length of the standard section of the comprehensive pipe rack among functional node wells) is larger than 200 m.
The drainage structure of the utility tunnel causes open holes to be formed at the crossing fireproof separation parts of the drainage open ditch due to the following reasons: (1) 7.1.6 of the technical Specification of urban Utility tunnel engineering (GB 50838-2015) prescribes that a natural gas pipeline cabin and a cabin for accommodating a power cable are subjected to fireproof separation by adopting a nonflammable wall body with a fireproof limit of not less than 3.0h every 200 m; the power cable is used as a main corridor pipeline of the urban comprehensive pipe gallery, the length of a fireproof interval of the comprehensive pipe gallery is generally set to be 200m according to standard requirements, different fireproof intervals are separated by a firewall and a fireproof door, the length of the non-excavation comprehensive pipe gallery interval is greater than 200m, and a plurality of fireproof separations are generally arranged in the intervals; (2) The 7.6 th rule of the urban comprehensive pipe rack engineering technical specification (GB 50838-2015) specifies that a drainage system should be arranged in the comprehensive pipe rack; the bottom plate of the utility tunnel is preferably provided with a drain open ditch, and accumulated water in the utility tunnel is collected into a water collecting pit through the drain open ditch and discharged out of the utility tunnel through a drain pump; the drainage interval mainly comprises a drainage open ditch, a water collecting pit and a drainage pump; the non-excavation utility tunnel generally sets up sump pit and drain pump in the function node well, leads to the drainage open channel to stride across a plurality of fire prevention subregions, and interval fire prevention separation department needs to reserve drainage open channel water hole.
According to the building design fireproof standard (GB 50016-2015), the firewall is provided with a first-class fireproof door and a first-class fireproof door which can not be opened or can be automatically closed in case of fire when the firewall is required to be opened. High-temperature smoke and fire in the building are prevented from spreading and diffusing through openings, pores and the like on the fireproof wall, so that the fireproof safety of the fireproof partition is ensured. The design of the long-range comprehensive pipe rack requires that the water hole of the water drain open ditch at the fireproof separation part is opened at ordinary times and closed during disasters, and the fireproof door capable of being automatically closed during disasters is additionally arranged at the water hole. At present, because the water holes of the open drainage ditch at the fireproof separation part are smaller and the number is more (the fireproof separation parts are all required to be arranged), the engineering cost is increased, the non-excavation type long-interval comprehensive pipe rack engineering is less adopted, and the risk that high-temperature smoke and fire spread and spread in the adjacent fireproof separation parts under the fire working condition exists.
Disclosure of Invention
Aiming at the defect that water holes exist in the water drainage open channels at the fireproof blocking positions of the non-excavation type long-range comprehensive pipe rack, the utility model aims to solve the technical problem that under the fire disaster working condition of the comprehensive pipe rack, high-temperature smoke and fire are prevented from spreading and diffusing to adjacent fireproof subareas through the water holes in the fireproof blocking positions of the water drainage open channels, and provides a drainage structure applied to the non-excavation type long-range comprehensive pipe rack.
According to the technical scheme provided by the utility model, the drainage structure applied to the non-excavation type long-interval comprehensive pipe rack comprises a comprehensive pipe rack body, a fireproof barrier, a plain concrete cushion layer, a drainage side ditch and a converging ditch; the inspection wells comprise inspection well covers and inspection well chambers, the inspection well covers are easy to open and are arranged above the inspection well chambers, and the drainage side ditches are arranged on two sides of the comprehensive pipe gallery body and are disconnected at the fireproof blocking positions; the converging channel is arranged in the inspection well chamber, and the drainage side channel is connected with the inspection well chamber through the converging channel; a drainage blind ditch is arranged in the plain concrete cushion layer below the fireproof barrier, and inspection well chambers on two sides of the fireproof barrier are connected through the drainage blind ditch; an automatic water supply system is arranged at the converging channel at the low position of the elevation of the fireproof section; the automatic water supply system is connected with a fire control system in the comprehensive pipe rack.
As a further improvement of the utility model, the automatic water supply system comprises an automatic water supply system pipeline and an automatic water supply system control valve; the automatic water supply system pipeline is arranged in the comprehensive pipe rack, the automatic water supply system control valve is arranged at the side converging ditch of the high-position fireproof section, the automatic water supply system pipeline is connected with the automatic water supply system control valve, and the automatic water supply system control valve is controlled to be opened by the fire control system. When a fire disaster occurs in the comprehensive pipe gallery, the automatic water supply system fills water into the inspection well to realize submerged sealing of the drainage blind ditch; after the fire is extinguished, the control valve of the automatic water supply system is closed by the comprehensive pipe gallery operation and maintenance personnel.
As a further improvement of the utility model, the inspection well chamber is respectively provided with a water inlet pipe orifice and a water outlet pipe orifice, the water outlet pipe orifice is connected with a drainage blind ditch, and the water inlet pipe orifice is connected with a converging ditch.
As a further improvement of the utility model, a groove is arranged in the inspection well chamber, and a sediment chamber for sediment deposition is arranged in the groove.
As a further improvement of the utility model, the drainage blind ditch is provided with a longitudinal slope, so that water flow can be ensured to flow from the high-level fireproof section to the low-level fireproof section.
As a further improvement of the present utility model; the cross section area of the drainage blind ditch is not smaller than the sum of the cross section areas of the confluence ditches in the same inspection well chamber; the height of the top of the drainage blind ditch is lower than the lowest height of the confluence ditch in the same inspection well chamber; the elevation of the ditch bottom of the end part of the drainage blind ditch is higher than the elevation of the bottom of the inspection well correspondingly connected.
As a further improvement of the utility model, the drainage side ditch is provided with a longitudinal slope, so that water flow from high to bottom can be ensured, and a water accumulation area is not formed in the section of the comprehensive pipe gallery.
As a further improvement of the utility model, the converging channel is provided with a longitudinal slope, so that water flow can be ensured to flow into the inspection well chamber from the drainage side channel; the sectional area of the converging channel is larger than that of the drainage side channel correspondingly connected.
As a further improvement of the utility model, the fire-proof barrier is provided with water holes, which can block high-temperature smoke and fire from spreading and diffusing to adjacent fire-proof partitions.
Compared with the prior art, the utility model has the following advantages:
according to the utility model, the drainage blind ditches, the inspection wells and the confluence ditches are arranged to connect drainage side ditches in different fireproof intervals, so that the smooth drainage among the functional node wells is ensured; meanwhile, an automatic water supply system is arranged at the converging port, under the fire working condition, the drainage blind ditch is submerged and sealed through the water body, and high-temperature smoke and fire are prevented from spreading and diffusing to the adjacent fireproof subareas; the inspection shaft is arranged to help the drainage side ditch to accumulate water and collect flow and clear the drainage blind ditch to accumulate sediment, so that the drainage of the interval is smooth. The fire-proof device can effectively solve the problem that the fire-proof device is less in fire-proof equipment compared with the design concept of 'normally open and closed during disaster', and meanwhile, the fire-proof device can ensure smooth drainage during disaster, and the risk of smoke channeling and fire channeling during fire prevention and blocking of water passing holes in long-interval non-excavation comprehensive pipe racks is effectively solved.
Drawings
Fig. 1 is a cross-sectional view of a drainage system of the present utility model.
Fig. 2 is a plan view of the drainage system of the present utility model.
FIG. 3 is a cross-sectional view A-A of FIGS. 1 and 2 in accordance with the present utility model.
FIG. 4 is a cross-sectional view B-B of FIGS. 1 and 2 in accordance with the present utility model.
FIG. 5 is a cross-sectional view of the utility model taken along line C-C in FIGS. 1 and 2.
Description of the drawings: in the figure: 1-utility tunnel body, 2-fire prevention separation, 3-plain concrete bed course, 4-drainage side ditch, 5-conflux ditch, 6-manhole cover, 7-manhole room, 8-drainage blind ditch, 9-automatic water supply system pipeline, 10-automatic water supply system control valve.
Detailed Description
The utility model is further described below with reference to the drawings and examples.
As shown in fig. 1 to 5, the present embodiment is a non-excavation type long-section utility tunnel drainage structure, the section of the utility tunnel is a circular single-cabin section, and the non-excavation method adopts a shield or pipe jacking process.
Referring to fig. 1 to 5, a drainage structure for a non-excavation long-range utility tunnel comprises a utility tunnel body 1, a fireproof barrier 2, a plain concrete cushion layer 3, a drainage side ditch 4 and a confluence ditch 5. In order to avoid the water passing holes formed when the drainage ditches 4 pass through the fireproof barrier 2, the drainage ditches can become a risk source of smoke and fire channeling when a fire disaster occurs, and inspection wells are arranged on two sides of the fireproof barrier 2; the inspection well comprises an inspection well cover 6 and an inspection well chamber 7, wherein the inspection well cover 6 is easy to open and is arranged above the inspection well chamber 7, and the drainage side ditch 4 is connected with the inspection well chamber 7 through the converging ditch 5; the drainage side ditches 4 are arranged on two sides of the utility tunnel body 1 and are disconnected at the fireproof blocking positions; the converging channel 5 is arranged in the inspection well chamber 7; a drainage blind ditch 8 is arranged in the plain concrete cushion layer 3 below the fireproof barrier 2, and inspection well chambers 7 on two sides of the fireproof barrier 2 are connected through the drainage blind ditch 8.
Further, an automatic water supply system is arranged in the comprehensive pipe rack 1, and the automatic water supply system comprises an automatic water supply system pipeline 9 and an automatic water supply system control valve 10. The automatic water supply system control valve 10 is positioned at the converging channel 5 at the side of the high-level fireproof section and is controlled by the fire control system to be responsible for opening; the automatic water supply system pipeline 9 is connected with an automatic water supply system control valve 10. When the comprehensive pipe gallery is in fire, the automatic water supply system fills water into the inspection well to realize submerged sealing of the drainage blind drain 8; after the fire is extinguished, the automatic water supply control valve 10 is closed by service personnel of the utility tunnel.
Further, water inlet and outlet nozzles are respectively arranged in the inspection well chamber 7, the water outlet nozzle is connected with the drainage blind ditch 8, and the water inlet nozzle is connected with the converging ditch 5.
Further, a groove is arranged in the inspection well chamber 7, and a sediment chamber for sediment deposition is arranged in the groove.
Further, the drain side ditch 4 is provided with a longitudinal slope, so that water flow is ensured to flow from a high place to a bottom place, and a water accumulation area is not formed in the section of the utility tunnel.
Further, the drainage blind ditch 8 is provided with a longitudinal slope, so that water flow is ensured to flow from the high-level fireproof section to the low-level fireproof section.
Further, the method comprises the steps of; the cross-sectional area of the drainage blind drain 8 should not be smaller than the sum of the cross-sectional areas of the confluence trenches 5 in the same inspection well chamber 7; the height of the top of the drain blind ditch 8 is lower than the lowest height of the converging ditch 5, and the bottom height Cheng Yinggao of the end of the drain blind ditch 8 is lower than the bottom height of the corresponding connected inspection well.
Further, the converging channel 5 is provided with a longitudinal slope, so that water flow is ensured to flow into the inspection well chamber 7 from the drainage side channel 4; the cross-sectional area of the confluence groove 5 should be larger than that of the drainage side groove 4 correspondingly connected.
The utility model has the working principle under the fire working condition that:
when a fire disaster occurs in the comprehensive pipe rack, the fire control system immediately opens the automatic water supply system control valve 10 to inject water into the inspection well, so that the water level of the inspection well chamber 7 rapidly exceeds the top of the drainage blind ditch 8, and the water holes at the fireproof barrier 2 are submerged by water, thereby blocking high-temperature smoke and fire from spreading and diffusing to adjacent fireproof subareas.
The utility model has the working principle under the non-fire working condition:
the accumulated water in the utility tunnel is collected to the water collecting pit in the functional node well along the drainage side ditch 4 through the converging ditch 5, the inspection well chamber 7 and the drainage hidden ditch 8 in each fireproof section, and is drained to the municipal rainwater well through the drainage pump in the water collecting pit. During normal operation of the comprehensive pipe gallery, the inspection well cover 6 is opened at regular time, deposited sediment in the inspection well chamber 7 and the drainage blind drain 8 is cleaned, and the overall smoothness of the drainage structure is ensured.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art should be able to apply the present utility model to the present utility model, and all the modifications, equivalents and variations according to the technical scheme and the inventive concept thereof are included in the scope of the present utility model.
Claims (9)
1. Be applied to drainage structures of non-excavation formula long interval utility tunnel, including utility tunnel body (1), fire prevention separation (2) and plain concrete bed course (3), its characterized in that: the utility model also comprises a drainage side ditch (4) and a converging ditch (5); the two sides of the fireproof barrier (2) are provided with inspection wells, each inspection well comprises an inspection well cover (6) and an inspection well chamber (7), the inspection well covers (6) are easy to open and are arranged above the inspection well chambers (7); the drainage side ditches (4) are arranged on two sides of the utility tunnel body (1) and are disconnected at the fireproof barrier (2); the converging channel (5) is arranged in the inspection well chamber (7), and the drainage side channel (4) is connected with the inspection well chamber (7) through the converging channel (5); a drainage blind ditch (8) is arranged in the plain concrete cushion layer (3) below the fireproof barrier (2), and inspection well chambers (7) at two sides of the fireproof barrier (2) are connected through the drainage blind ditch (8); an automatic water supply system is arranged at the converging channel (5), and the automatic water supply system is connected with a fire control system in the comprehensive pipe rack.
2. The drainage structure for trenchless long reach utility tunnel of claim 1, wherein: the automatic water supply system comprises an automatic water supply system pipeline (9) and an automatic water supply system control valve (10); the automatic water supply system pipeline (9) is arranged in the comprehensive pipe rack body (1), and the automatic water supply system control valve (10) is arranged at the confluence ditch (5) at the side of the high-position fireproof section; the automatic water supply system pipeline (9) is connected with the automatic water supply system control valve (10), and when a utility tunnel fire disaster occurs, the automatic water supply system injects water into the inspection well to realize submerged sealing of the drainage blind drain (8).
3. The drainage structure for trenchless long reach utility tunnel of claim 1, wherein: and water inlet and outlet nozzles are respectively arranged in the inspection well chamber (7), the water outlet nozzles are connected with the drainage blind ditches (8), and the water inlet nozzles are connected with the converging ditches (5).
4. The drainage structure for trenchless long reach utility tunnel of claim 1, wherein: a groove is formed in the inspection well chamber (7), and a sediment chamber for sediment precipitation is arranged in the groove.
5. The drainage structure for trenchless long reach utility tunnel of claim 1, wherein: the drainage blind ditch (8) is provided with a longitudinal slope, so that water flow can flow from a high-level fireproof section to a low-level fireproof section.
6. The drainage structure for trenchless long reach utility tunnel of claim 1, wherein: the cross section area of the drainage blind ditch (8) is not smaller than the sum of the cross section areas of the confluence ditches (5) in the same inspection well chamber (7); the elevation of the ditch top of the drainage blind ditch (8) is lower than the lowest elevation of the confluence ditch (5); the ditch bottom height Cheng Yinggao at the end of the drainage blind ditch (8) is corresponding to the bottom elevation of the connected inspection well.
7. The drainage structure for trenchless long reach utility tunnel of claim 1, wherein: the drainage side ditch (4) is provided with a longitudinal slope, so that water flow can be ensured to flow from a high place to a bottom place, and a water accumulation area is not formed in the section of the comprehensive pipe rack.
8. The drainage structure for trenchless long reach utility tunnel of claim 1, wherein: the converging channel (5) is provided with a longitudinal slope, so that water flow can be ensured to flow into the inspection well chamber (7) from the drainage side channel (4); the cross section area of the converging channel (5) is larger than that of the drainage side channel (4) correspondingly connected.
9. The drainage structure for trenchless long reach utility tunnel of claim 1, wherein: the fire-proof barrier (2) is provided with water holes, so that high-temperature smoke and fire can be prevented from spreading and diffusing to adjacent fire-proof partitions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322276325.XU CN220522630U (en) | 2023-08-24 | 2023-08-24 | Be applied to drainage structures of non-excavation formula long interval utility tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322276325.XU CN220522630U (en) | 2023-08-24 | 2023-08-24 | Be applied to drainage structures of non-excavation formula long interval utility tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220522630U true CN220522630U (en) | 2024-02-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322276325.XU Active CN220522630U (en) | 2023-08-24 | 2023-08-24 | Be applied to drainage structures of non-excavation formula long interval utility tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220522630U (en) |
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2023
- 2023-08-24 CN CN202322276325.XU patent/CN220522630U/en active Active
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