Maintenance channel arrangement structure for multiple high-pressure long tunnels

Abstract

The utility model provides an overhaul channel arrangement structure for multiple high-pressure long tunnels, which comprises a first overhaul channel reconstructed from a construction tunnel and at least two parallel diversion tunnels, an access door is arranged on the inlet side of the first overhaul channel, and the other side of the first overhaul channel is connected with an adjacent diversion tunnel. The inclined lower portions of the other diversion tunnels are connected with a second overhaul channel, the bottom of the second overhaul channel is connected with an underpass channel, a connecting channel is connected between the underpass channel and the first overhaul channel, and a manhole is formed in the side, connected with the first overhaul channel / the second overhaul channel, of each diversion tunnel. According to the diversion tunnel maintenance channel, the problem that two or more than two diversion tunnel maintenance channels arranged in parallel are difficult to arrange is solved, and the engineering investment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of water diversion and power generation, in particular to a maintenance channel arrangement structure of multiple high-pressure long tunnels. Background Art

[0002] To ensure sufficient water diversion capacity, hydropower projects typically utilize two or more parallel diversion tunnels. Due to topographical constraints, these tunnels are typically located within mountainous terrain. As they operate over time, these tunnels inevitably develop engineering defects, which in severe cases can compromise the integrity and stability of the tunnels, posing a serious threat to their safe operation. Therefore, to meet the maintenance needs of diversion tunnels during operation, necessary access routes should be established.

[0003] At present, the construction tunnel formed when excavating the water diversion tunnel is usually converted into a maintenance passage. However, for two or more water diversion tunnels arranged in parallel, it is usually difficult to arrange the maintenance passage of the subsequent water diversion tunnel due to the obstruction of the first water diversion tunnel. If a maintenance passage is set up separately for the subsequent water diversion tunnel, the cost is high. In addition, during the operation of the water diversion tunnel, water seepage or groundwater seepage in the water diversion tunnel causes water to accumulate in the maintenance passage, which is difficult to drain, causing great inconvenience to the maintenance work. Utility Model Content

[0004] The purpose of the present utility model is to overcome the deficiencies of the above-mentioned prior art and provide a maintenance channel arrangement structure for multiple high-pressure long tunnels, which can solve the problem that when two or more water diversion tunnels are arranged in parallel, it is usually difficult to arrange the maintenance channels of subsequent water diversion tunnels due to the obstruction of the first water diversion tunnel.

[0005] To this end, the utility model adopts the following technical solutions:

[0006] A maintenance channel arrangement structure for multiple high-pressure long tunnels includes a first maintenance channel converted from a construction tunnel and at least two parallel water diversion tunnels. An maintenance door is provided on the entrance side of the first maintenance channel. The other side of the first maintenance channel is connected to an adjacent water diversion tunnel. Second maintenance channels are connected obliquely below the remaining water diversion tunnels. The bottom of the second maintenance channel is connected to an underpass. A connecting channel is connected between the underpass and the first maintenance channel. A manhole is provided on the side of the water diversion tunnel connected to the first maintenance channel / the second maintenance channel.

[0007] On the basis of adopting the above technical solutions, the present invention may also adopt the following further technical solutions, or use these further technical solutions in combination:

[0008] The first maintenance passage is arranged horizontally, and the underpass parallel to the first maintenance passage is lined with steel pipes.

[0009] The first inspection channel, the second inspection channel, the underpass channel and the connecting channel are all lined with steel pipes.

[0010] Pedals are fixed on the side walls of the connecting passage and the second inspection passage.

[0011] A drainage pipe is connected below the underpass and is arranged close to the connecting channel.

[0012] A working ball valve is provided on the drain pipe.

[0013] The inclination angle of the connecting passage and the second inspection passage does not exceed 45°.

[0014] The pedals are made of angle steel, and the distance between two adjacent pedals is 30-50 cm.

[0015] The center line of the second inspection channel passes through the center line of the diversion tunnel connected thereto.

[0016] Compared with the existing technology, the present invention has the following advantages and beneficial effects: by setting up a second inspection channel, as well as an underpass and a connecting channel connecting the first inspection channel and the second inspection channel, the problem of difficulty in arranging inspection channels for two or more water diversion tunnels arranged in parallel is solved, and the project investment is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the cross-sectional structure of the present utility model. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solution of the present invention, the preferred implementation scheme of the present invention is described below in conjunction with specific embodiments. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar numbers throughout represent elements with the same or similar functions. However, it should be understood that the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. In order to better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted, and the positional relationship described in the drawings is only used for illustrative purposes and cannot be understood as limiting the present invention.

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0020] The utility model provides a maintenance channel arrangement structure for multiple high-pressure long tunnels, including a first maintenance channel 3 converted from a construction tunnel and at least two parallel water diversion tunnels 1. An maintenance door 10 is provided on the entrance side of the first maintenance channel 3, and the other side of the first maintenance channel 3 is connected to an adjacent water diversion tunnel 1. The oblique lower part of the remaining water diversion tunnels 1 is connected to a second maintenance channel 5, and the bottom of the second maintenance channel 5 is connected to an underpass 4. A connecting channel 2 is connected between the underpass 4 and the first maintenance channel 3. A manhole is provided on the side of the water diversion tunnel 1 connected to the first maintenance channel 3 / the second maintenance channel 5.

[0021] The inspection door 10 is used to close the first inspection passage 3 to prevent accidental entry.

[0022] The first inspection channel 3 is arranged horizontally, and the underpass 4 is parallel to the first inspection channel 3 and both are lined with steel pipes 7 .

[0023] The first inspection channel 3 , the second inspection channel 5 , the underpass 4 and the connecting channel 2 are all lined with steel pipes 7 .

[0024] Pedals 8 are fixed on the side walls of the connecting passage 2 and the second inspection passage 5 to facilitate entry and exit of maintenance personnel carrying maintenance tools.

[0025] A drainage pipe 6 is connected to the bottom of the underpass 4 and is arranged close to the connecting channel 2. The drainage pipe 6 can simultaneously meet the drainage needs of the first inspection channel 3, the second inspection channel 5, and the underpass 4. No auxiliary equipment is required for drainage, and the operation is convenient and the effect is good.

[0026] A working ball valve 11 is provided on the drain pipe 6. The working ball valve 11 is used to control the drainage working condition of the drain pipe 6, which can extend the service life of the pipeline and effectively prevent safety accidents caused by failures.

[0027] The inclination angle of the connecting channel 2 and the second inspection channel 5 does not exceed 45°.

[0028] The inclination angle of the connecting channel 2 and the second maintenance channel 5 can be set between 30° and 45°. When in a small-angle inclination state, it is convenient for maintenance personnel to go up and down.

[0029] The pedal 8 is made of angle steel, and the distance between two adjacent pedals is 30-50 cm.

[0030] The center line of the second inspection channel 5 passes through the center of the diversion tunnel 1 connected thereto. At this time, the intersection area of the two is minimal, which can improve the stress conditions, facilitate welding work, and reduce construction difficulty.

[0031] It should be noted that the terms "including" and "having" in the specification and claims of the present invention and the above-mentioned drawings, as well as any variations thereof, are intended to cover non-exclusive inclusions. The terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two mechanisms, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0032] In the description of this utility model, it should be understood that terms such as "one end," "the other end," "outer side," "inner side," "horizontal," "end," "length," "outer end," "left," and "right" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are used solely to facilitate the description of this utility model and to simplify the description. They do not indicate or imply that the mechanisms or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first" and "second" are used solely for brevity of description and do not indicate or imply relative importance.

[0033] Furthermore, in practicing the claims of the present invention, those skilled in the art may understand and effect variations to the disclosed embodiments by studying the drawings, the disclosure, and the appended claims. Furthermore, in the claims and the specification, words such as "comprising" and "including" do not exclude other elements or steps, and non-plural nouns do not exclude their plural forms.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. All equivalent changes and modifications made based on the present invention are covered by the scope of the claims of the present invention and will not be listed one by one here.

Claims

1. A maintenance channel arrangement structure for multiple high-pressure long tunnels, characterized in that: The invention comprises a first inspection channel (3) reconstructed from a construction tunnel and at least two parallel diversion tunnels (1), wherein an inspection door (10) is provided at the entrance side of the first inspection channel (3), the other side of the first inspection channel (3) is connected to an adjacent diversion tunnel (1), and the oblique lower part of the remaining diversion tunnels (1) is connected to a second inspection channel (5), the bottom of the second inspection channel (5) is connected to an underpass (4), a connecting channel (2) is connected between the underpass (4) and the first inspection channel (3), and a manhole is provided on one side of the diversion tunnel (1) connected to the first inspection channel (3) / the second inspection channel (5).

2. The arrangement structure of maintenance passages for multiple high-pressure long tunnels according to claim 1, characterized in that: The first maintenance passage (3) is arranged horizontally, and the underpass (4) is parallel to the first maintenance passage (3) and is lined with steel pipes (7).

3. The arrangement structure of maintenance passages for multiple high-pressure long tunnels according to claim 1, characterized in that: The first inspection channel (3), the second inspection channel (5), the underpass channel (4), and the connecting channel (2) are all lined with steel pipes (7).

4. The arrangement structure of maintenance passages for multiple high-pressure long tunnels according to claim 1, characterized in that: Pedals (8) are fixed on the side walls of the connecting passage (2) and the second inspection passage (5).

5. The arrangement structure of maintenance passages for multiple high-pressure long tunnels according to claim 1, characterized in that: A drainage pipe (6) is connected below the underpass channel (4), and the drainage pipe (6) is arranged close to the connecting channel (2).

6. The arrangement structure of maintenance passages for multiple high-pressure long tunnels according to claim 5, characterized in that: A working ball valve (11) is provided on the drainage pipe (6).

7. The arrangement structure of maintenance passages for multiple high-pressure long tunnels according to claim 1, characterized in that: The inclination angle of the connecting passage (2) and the second inspection passage (5) does not exceed 45°.

8. The arrangement structure of maintenance passages for multiple high-pressure long tunnels according to claim 4, characterized in that: The pedals (8) are made of angle steel, and the distance between two adjacent pedals is 30-50 cm.

9. The arrangement structure of maintenance passages for multiple high-pressure long tunnels according to claim 1, characterized in that: The center line of the second inspection channel (5) passes through the center line of the diversion tunnel (1) connected thereto.

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