A manhole structure and a tunnel drainage system

Abstract

The utility model relates to a tunnel construction technical field, especially a kind of inspection well structure and a kind of tunnel drainage system, inspection well structure includes inspection well, and the upper portion of inspection well is equipped with heat preservation cavity, and heat preservation cavity is placed with heat preservation box inside, and heat preservation box is equipped with air bag inside;Heat preservation cavity upper portion is equipped with first cover, and heat preservation cavity lower portion is equipped with second cover, and second cover is used to support heat preservation box bottom portion;The bottom portion of inspection well is connected with drainage pipe and communicates. Through first cover and second cover to seal the upper portion of inspection well, to avoid the cold air in tunnel to enter inspection well and weaken the influence of cold air on inspection well, by inflating air bag, air bag is inflated and extruded heat preservation box, so that heat preservation box and heat preservation cavity inner wall are closely fitted, effectively reduce the gap between heat preservation box and heat preservation cavity inner wall, greatly prevent external cold air from entering the inside of inspection well through these gaps, reduce the risk that water flow in drainage pipe freezes and expands to cause damage to drainage pipe.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, and in particular to a manhole structure and a tunnel drainage system. Background Technology

[0002] In cold regions, tunnels often require frost-resistant sections at their entrances and exits due to low temperatures and severe frost damage. Centrally buried drainage ditches, a common method for frost protection in cold-region tunnels, are of significant engineering importance and practical value in ensuring the normal operation of tunnel drainage systems. These ditches are located below the tunnel invert, and to facilitate future maintenance and dredging, inspection wells are typically installed at regular intervals along the ditch.

[0003] Meanwhile, to prevent the drainage pipes in the central buried ditch from being affected by the convection of cold air inside the tunnel, which could cause the water inside the drainage pipes to freeze and expand, damaging the drainage pipe structure, sealing and insulation measures are taken for the inspection wells, such as installing cover plates and insulation materials on the top of the inspection wells. However, there are unavoidable gaps between the insulation materials and the well walls, which can easily allow cold air from the outside to enter, affecting the insulation effect of the inspection wells. Utility Model Content

[0004] The purpose of this utility model is to address the problem that there are unavoidable gaps between the insulation material and the wall of the inspection well, which easily allow cold air from the outside to enter and affect the insulation effect of the inspection well, by providing an inspection well structure and a tunnel drainage system.

[0005] In a first aspect, the present invention provides a manhole structure, including a manhole, wherein a heat insulation cavity is provided at the upper part of the manhole, a heat insulation box is placed inside the heat insulation cavity, and an airbag is installed inside the heat insulation box; A first cover plate is provided above the heat preservation cavity, and a second cover plate is provided below the heat preservation cavity. The second cover plate is used to support the bottom of the heat preservation box. The bottom of the inspection well is connected to the drainage pipe.

[0006] Preferably, the bottom of the heat-insulating cavity has a second annular platform, the second cover plate is placed on the second annular platform, and the heat-insulating box is placed on the second cover plate.

[0007] Preferably, the top of the insulation cavity has a first annular platform, and the first cover plate is placed on the first annular platform.

[0008] Preferably, a rubber layer is laid on the side wall of the insulation cavity.

[0009] Preferably, the first cover plate is a reinforced concrete component.

[0010] Preferably, the second cover plate is a wooden component.

[0011] Preferably, it also includes ladders, which are vertically spaced along the inner wall of the inspection well.

[0012] Preferably, it also includes a waterstop strip, which is disposed on the side wall of the inspection well.

[0013] In a second aspect, the present invention provides a tunnel drainage system, including a deep-buried ditch located at the bottom of the tunnel, wherein a drainage pipe is provided in the deep-buried ditch; It also includes a manhole structure as described in this utility model, wherein the drainage pipe is connected to the bottom of the manhole.

[0014] Preferably, it also includes an intercepting net installed on the inner wall of the inspection well and covering the drainage pipe.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model discloses a manhole structure, which includes an insulation cavity at the top of the manhole and an insulation box installed inside the insulation cavity to insulate the upper part of the manhole. A first cover plate is installed above the insulation cavity, and a second cover plate is installed below the insulation cavity. The first and second cover plates seal the upper part of the manhole, thereby preventing cold air from the tunnel from entering the manhole and reducing the impact of cold air on the manhole. This reduces the impact of cold air from the tunnel on the insulation of the deep-buried water ditch at the bottom of the manhole. Furthermore, an airbag is installed inside the insulation box. By inflating the airbag, the airbag expands and compresses the insulation box, making the insulation box fit tightly against the inner wall of the insulation cavity. This effectively reduces the gaps between the insulation box and the inner wall of the insulation cavity, greatly preventing external cold air from entering the manhole through these gaps, enhancing the insulation effect, and also preventing the impact of cold air on the drainage pipe in the deep-buried water ditch, reducing the risk of water freezing and expanding in the drainage pipe, which could damage the drainage pipe.

[0016] 2. The tunnel drainage system of this utility model provides continuous heat preservation protection for the drainage pipe in the deep-buried ditch through the heat preservation cavity, heat preservation box, first cover plate and second cover plate, so as to prevent the drainage pipe from freezing and expanding due to the intrusion of cold air, and ensure that the tunnel drainage system continues to be unobstructed in low temperature environment, and prevent tunnel freezing damage caused by drainage failure. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the tunnel drainage system.

[0018] Figure 2 This is a schematic diagram of the manhole structure.

[0019] Figure 3 yes Figure 2 Sectional view at point I-I.

[0020] Figure 4 yes Figure 2 Sectional view at point II-II.

[0021] Figure 5 yes Figure 3 A magnified view of section B.

[0022] Figure 6 yes Figure 3 A magnified view of part A.

[0023] Marked in the image: 1-Inspection well, 11-Insulation cavity, 111-First annular stage, 11,2-Second annular stage, 2-Insulated box, 3-Airbags 4-First cover plate, 5-Second cover plate, 6-Rubber layer, 7- Climbing ladders 8-water stop strip, 9-Interception net, 10-Tunnel, 20-Deep buried ditches, 30-Drain pipe, 40-Washer, 50 - Sealing strip. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0025] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0026] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," "parallel," and "coaxial" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, parallel, or coaxial. Slight tilt or deviation is permissible, as long as it does not affect the normal function of the relevant component. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be perfectly horizontal; a slight tilt is acceptable. "Coaxial" means that two components are set as coaxially as possible, allowing them to move coaxially or approximately coaxially when their relative positions change. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," "parallel," or "coaxial" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. For example, the deviation in the "coaxial" direction is controlled within 0.2-1mm, preferably within 0.2-0.5mm. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0027] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0028] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0029] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0030] Example 1 like Figures 1-4 As shown, a manhole structure includes a manhole 1, an insulation cavity 11 is provided on the upper part of the manhole 1, an insulation box 2 is placed in the insulation cavity 11, and an airbag 3 is installed inside the insulation box 2. A first cover plate 4 is provided above the heat preservation cavity 11, and a second cover plate 5 is provided below the heat preservation cavity 11. The second cover plate 5 is used to support the bottom of the heat preservation box 2. The bottom of inspection well 1 is connected to drainage pipe 30.

[0031] This embodiment of a manhole structure includes an insulation cavity 11 at the top of the manhole 1, with an insulation box 2 installed inside the cavity 11 to insulate the upper part of the manhole 1. A first cover plate 4 is installed above the insulation cavity 11, and a second cover plate 5 is installed below it. The first and second cover plates 4 and 5 seal the upper part of the manhole 1, thereby preventing cold air from the tunnel 10 from entering the manhole 1 and reducing the impact of cold air on the manhole 1. This, in turn, reduces the impact of cold air from the tunnel 10 on the deeply buried water ditch at the bottom of the manhole 1. Furthermore, to mitigate the thermal insulation effect of the 20, an air bladder 3 is installed inside the insulation box 2. By inflating the air bladder 3, it expands and compresses the insulation box 2, thereby ensuring a tight fit between the insulation box 2 and the inner wall of the insulation cavity 11. This effectively reduces the gaps between the insulation box 2 and the inner wall of the insulation cavity 11, greatly preventing external cold air from entering the inspection well 1 through these gaps. This enhances the thermal insulation effect and also avoids the impact of cold air on the drainage pipe 30 in the deep-buried water ditch 20, reducing the risk of water freezing and expanding inside the drainage pipe 30, which could damage the pipe.

[0032] In this embodiment, the upper part of the insulation cavity 11 is sealed by the first cover plate 4 to prevent cold air in the tunnel 10 from directly entering the insulation cavity 11; Furthermore, the second cover plate 5 located below the insulation cavity 11 not only provides stable support for the insulation box 2, but also isolates the space between the insulation cavity 11 and the lower part of the inspection well 1, forming another layer of seal and improving the sealing and insulation effect of the inspection well 1.

[0033] In this embodiment, by inflating the airbag 3, the airbag 3 expands and squeezes the insulation box 2, thereby squeezing the insulation box 2 against the inner wall of the insulation cavity 11 and fitting it tightly. When performing maintenance, after opening the first cover plate 4, the airbag 3 is deflated, and then the insulation box 2 and the second cover plate 5 are removed before the maintenance and dredging work of the inspection well 1 is carried out. After dredging, the second cover plate 5 and the insulation box 2 are placed back in sequence. Then, the airbag 3 is inflated to fill the internal space of the insulation box 2 and compress the side wall of the insulation box 2, so that the insulation box 2 fits against the inner wall of the insulation cavity 11, thus achieving a seal between the insulation box 2 and the insulation cavity 11. Then, the first cover plate 4 is installed. Compared with traditional inspection wells, this method does not damage the insulation layer structure and allows for multiple inspections and maintenance.

[0034] In an optional embodiment, the heat preservation box 2 is a box-shaped structure with an opening at the top, and its material is butyl rubber. The airbag 3 is located inside the box-shaped structure. The top of the airbag 3 is provided with an air nozzle for inflation or deflation.

[0035] In an optional embodiment, a rubber layer 6 is laid on the side wall of the insulation cavity 11. When the insulation box 2 is pressed against the inner wall of the insulation cavity 11, the elastic deformation characteristics of the rubber layer 6 are used to further fill the tiny gap between the insulation box 2 and the inner wall of the insulation cavity 11, thereby further enhancing the sealing between the insulation box 2 and the side wall of the insulation cavity 11.

[0036] In optional implementations, such as Figure 6 As shown, the bottom of the heat preservation cavity 11 has a second annular platform 112, the second cover plate 5 is placed on the second annular platform 112, and the heat preservation box 2 is placed on the second cover plate 5.

[0037] By setting a second annular platform 112 at the bottom of the insulation cavity 11, the second cover plate 5 is provided with precise positioning and stable support, thus preventing the insulation box 2 from tilting due to the placement of the second cover plate 5.

[0038] Furthermore, a rubber gasket 40 is placed between the second cover plate 5 and the second annular platform 112 to enhance the sealing performance of the second cover plate 5.

[0039] In optional implementations, such as Figure 5 As shown, the top of the heat preservation cavity 11 has a first annular platform 111, and the first cover plate 4 is placed on the first annular platform 111.

[0040] The first annular platform 111 at the top of the insulation cavity 11 provides an installation position for the first cover plate 4, ensuring that the first cover plate 4 fits tightly against the top of the insulation cavity 11. At the same time, the outer annular platform support can prevent the first cover plate 4 from pressing directly on the insulation box 2, preventing the insulation box 2 from being damaged due to pressure and ensuring the flatness of the first cover plate 4 installation, thus improving the top sealing of the insulation cavity 11.

[0041] Furthermore, a rubber gasket 40 is placed between the first cover plate 4 and the first annular platform 111 to enhance the sealing performance of the first cover plate 4.

[0042] Furthermore, a sealing strip 50 is provided along the circumference of the first cover plate 4 to enhance the sealing effect of the first cover plate 4.

[0043] In an optional embodiment, the first cover plate 4 is a reinforced concrete component; specifically, the first cover plate 4 is cast from reinforced concrete.

[0044] The first cover plate 4 is made of reinforced concrete, which significantly improves the compressive strength and frost resistance of the first cover plate 4 compared with traditional plastic or wooden cover plates. It can withstand the construction load at the top of the tunnel or the crushing of vehicles, and can effectively resist cracking caused by low temperature freeze-thaw cycles, thus preventing cold air from entering the manhole 1 if the first cover plate 4 is damaged.

[0045] In an optional embodiment, the second cover plate 5 is a wooden component; specifically, the second cover plate 5 is made of wood.

[0046] The second cover plate 5 is made of wood. By utilizing the low thermal conductivity of wood, the cold air in the lower part of the inspection well 1 is reduced from being transferred to the insulation cavity 11, thus helping to improve the insulation effect. At the same time, the wood material is lightweight, making it easy to disassemble and move during maintenance, reducing the operating intensity of maintenance personnel and making it convenient to move.

[0047] Specifically, the second cover plate 5 is an oil-impregnated wood cover plate.

[0048] In optional implementations, such as Figure 3 , Figure 4 As shown, it also includes ladders 7, which are vertically spaced along the inner wall of the inspection well 1. These ladders provide a safe passage for maintenance personnel to enter the bottom of the inspection well 1 for inspection and cleaning, solving the operational difficulties caused by the lack of climbing facilities in traditional inspection wells and shortening maintenance time. In optional implementations, such as Figure 3 , Figure 4 As shown, it also includes a waterstop strip 8, which is installed on the side wall of the inspection well 1. The waterstop strip prevents groundwater or snowmelt water around the tunnel 10 from seeping into the interior of the inspection well 1, and prevents the seeping water from freezing upon contact with cold air, thus preventing the inner wall of the inspection well 1 from freezing and breaking.

[0049] Example 2 like Figure 1 As shown, based on implementation 1, this embodiment discloses a tunnel drainage system, including a deep-buried ditch 20 set at the bottom of the tunnel 10, and a drainage pipe 30 is provided in the deep-buried ditch 20. It also includes a manhole structure as described in Example 1, wherein the drain pipe 30 is connected to the bottom of the manhole 1.

[0050] The insulation cavity 11, insulation box 2, first cover plate 4 and second cover plate 5 provide continuous insulation protection for the drainage pipe 30 in the deep-buried water ditch 20, preventing the drainage pipe 30 from freezing and expanding due to cold air intrusion, ensuring that the drainage system of tunnel 10 remains unobstructed in low-temperature environments, and preventing tunnel freezing damage caused by drainage failure.

[0051] In optional implementations, such as Figure 3 , Figure 4 As shown, it also includes a netting 9, which is installed on the inner wall of the inspection well 1 and covers the drain pipe 30.

[0052] The drainage pipe 30 intercepts stones, mud, and other debris, trapping them at the connection between the drainage pipe 30 and the inspection well 1. This also facilitates the later cleaning of the debris accumulated in the drainage pipe 30 through the inspection well 1.

[0053] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A manhole structure, characterized in that, Includes a manhole (1), the upper part of which is provided with a heat insulation cavity (11), and a heat insulation box (2) is placed inside the heat insulation cavity (11), and an airbag (3) is installed inside the heat insulation box (2). A first cover plate (4) is provided above the heat preservation cavity (11), and a second cover plate (5) is provided below the heat preservation cavity (11). The second cover plate (5) is used to support the bottom of the heat preservation box (2). The bottom of the inspection well (1) is connected to the drainage pipe (30).

2. The inspection well structure according to claim 1, characterized in that, The bottom of the heat preservation cavity (11) has a second annular platform (112), the second cover plate (5) is placed on the second annular platform (112), and the heat preservation box (2) is placed on the second cover plate (5).

3. The inspection well structure according to claim 1, characterized in that, The top of the heat-insulating cavity (11) has a first annular platform (111), and the first cover plate (4) is placed on the first annular platform (111).

4. The inspection well structure according to claim 1, characterized in that, A rubber layer (6) is laid on the side wall of the insulation cavity (11).

5. The inspection well structure according to claim 1, characterized in that, The first cover plate (4) is a reinforced concrete component.

6. The inspection well structure according to claim 1, characterized in that, The second cover plate (5) is a wooden component.

7. The inspection well structure according to claim 1, characterized in that, It also includes ladders (7), which are vertically spaced along the inspection well (1).

8. The inspection well structure according to claim 1, characterized in that, It also includes a waterstop strip (8), which is disposed on the side wall of the inspection well (1).

9. A tunnel drainage system, characterized in that, Includes a deep-buried water ditch (20) located at the bottom of the tunnel (10), and a drainage pipe (30) is provided in the deep-buried water ditch (20); It also includes a manhole structure as described in any one of claims 1-8, wherein the drain pipe (30) is connected to the bottom of the manhole (1).

10. A tunnel drainage system according to claim 9, characterized in that, It also includes a net (9) installed on the inner wall of the inspection well (1) and covering the drain pipe (30).

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