A rail transit section drainage pump station

Abstract

The present invention relates to the field of rail transit technology, and discloses a rail transit interval drainage pump station, comprising: a first pressure drainage main pipe, arranged in a left-line interval tunnel; a second pressure drainage main pipe, arranged in a right-line interval tunnel; a roadbed water collection ditch, arranged inside the roadbed, wherein at least two submersible pump groups are arranged in the roadbed water collection ditch; a part of the at least two submersible pump groups is connected in parallel to one of the first pressure drainage main pipe and the second pressure drainage main pipe, and another part of the at least two submersible pump groups is connected in parallel and crosses the communication channel between the left-line interval tunnel and the right-line interval tunnel, and is connected to the other of the first pressure drainage main pipe and the second pressure drainage main pipe. The present invention can effectively reduce the flow rate of each submersible pump in the submersible pump group, reduce the effective volume of the required water collection ditch, reduce the impact on the roadbed structure, improve the overall roadbed lateral stability, and enhance drainage safety and reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit, and in particular to a rail transit section drainage pump station. Background Art

[0002] According to the requirements of safe evacuation, a communication channel is set up between the two single-line section tunnels of rail transit. The longitudinal section of the conventional section tunnel adopts a "V"-shaped slope, and a drainage pump station needs to be set up at the lowest point of the section. The traditional drainage pump station is built together with the communication channel of the section, and the pump station is excavated under the communication channel. For sections with complex engineering conditions and high risks of excavating pump stations, other technical solutions need to be adopted.

[0003] At present, each single-track section is generally equipped with a built-in sump in the ballast, and a group (two) of submersible pumps are installed in the sump. The two submersible pumps are connected in parallel to the adjacent station and discharged to the outside. However, with this type of pump station layout, the sump needs to be at least 5m 3 The built-in sump of the roadbed can only use the space between the roadbed and the tunnel structure, resulting in a limited depth of the sump. At the same time, the submersible pump equipment itself has a minimum pump stop water level, which further reduces the effective depth of the sump. In order to meet the effective volume required by the submersible pump and the height requirements for the water pump installation itself, at present, special steel pipe segments are generally set at the installation position of the submersible pump to increase the height and effective volume of the sump; or by increasing the length of the sump to more than 20m to meet the effective volume requirements. However, the installation of special steel pipe segments requires that the concrete pipe segments at the water pump installation position be replaced with steel pipe segments, and the steel pipe segments have long-term water accumulation and a high risk of corrosion; increasing the length of the sump will affect the lateral stability of the overall roadbed. Summary of the invention

[0004] The present invention provides a rail transit section drainage pump station to solve the problem that the effective volume of a sump is increased by setting special steel pipe segments or increasing the length of the sump, which causes the steel pipe segments at the water pump installation position to be easily corroded and affects the lateral stability of the entire roadbed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The rail transit section drainage pump station of the present invention comprises:

[0007] A first pressure drainage pipe, which is arranged in the left-line section tunnel;

[0008] A second pressure drainage main pipe, which is arranged in the right-line section tunnel;

[0009] The ballast water collecting ditch is arranged inside the ballast, and at least two submersible pump groups are arranged in the ballast water collecting ditch; at least a part of the two submersible pump groups are connected in parallel to one of the first pressure drainage main pipe and the second pressure drainage main pipe, and at least another part of the two submersible pump groups are connected in parallel and cross the communication channel between the left-line section tunnel and the right-line section tunnel, and are connected to the other of the first pressure drainage main pipe and the second pressure drainage main pipe.

[0010] Preferably, each of the submersible pump groups includes at least two submersible pumps, and the submersible pumps in the same submersible pump group are arranged in parallel.

[0011] Preferably, two submersible pump groups are arranged in the ballast water collection ditch, each of the submersible pump groups comprises two submersible pumps, and the flow rate of the submersible pump is 10m 3 / h.

[0012] Preferably, the ballast bed drainage ditch is arranged at the center of the ballast bed.

[0013] Preferably, a water pump pit is provided in the ballast water collecting ditch, and the bottom elevation of the water pump pit is lower than the bottom elevation of the ballast water collecting ditch.

[0014] Preferably, the bottom surface of the water pump pit is flush with the surface of the shield segment of the left-line section tunnel or the right-line section tunnel.

[0015] Preferably, the roadbed drainage ditch is arranged at the lowest point section of the left-line section tunnel or the right-line section tunnel.

[0016] Preferably, both ends of the ballast water collecting ditch are connected to a cross-sectional ditch respectively.

[0017] Compared with the prior art, the rail transit section drainage pump station according to the embodiment of the present invention has the following beneficial effects:

[0018] In the rail transit section drainage pump station of the embodiment of the present invention, at least two submersible pump groups are arranged in each ballast ditch, a part of the submersible pump groups are connected in parallel to one of the first pressure drainage main pipe and the second pressure drainage main pipe, and the other part of the submersible pump groups are connected in parallel and connected to the other of the first pressure drainage main pipe and the second pressure drainage main pipe across the communication channel. On the one hand, the flow rate of each submersible pump in the submersible pump group can be effectively reduced, thereby reducing the effective volume of the required ditch. Since the flow rate of the submersible pump is reduced, the size of the equipment itself is reduced, which is conducive to installation in a narrow ballast ditch, and special steel pipe segments may not be provided. The reduction in the effective volume of the ditch reduces the setting length of the ditch, reduces the impact on the ballast structure, and improves the overall lateral stability of the ballast. On the other hand, the submersible pump groups in the single-track section tunnel are respectively connected to the first pressure drainage main pipe and the second pressure drainage main pipe, which can enhance the safety and reliability of drainage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic plan view of a rail transit section drainage pump station according to an embodiment of the present invention;

[0020] Figure 2 is a cross-sectional schematic diagram of a rail transit section drainage pump station according to an embodiment of the present invention;

[0021] In the figure, 10, left-line section tunnel; 20, right-line section tunnel; 30, ballast; 40, shield segment; 50, communication channel;

[0022] 1. The first pressure drainage main; 2. The second pressure drainage main; 3. The ballast water collecting ditch; 31. The pump pit; 4. The first submersible pump group; 41. The first submersible pump; 42. The second submersible pump; 5. The second submersible pump group; 51. The third submersible pump; 52. The fourth submersible pump; 6. The third submersible pump group; 61. The fifth submersible pump; 62. The sixth submersible pump; 7. The fourth submersible pump group; 71. The seventh submersible pump; 72. The eighth submersible pump; 8. The cross-ditch. DETAILED DESCRIPTION

[0023] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc., are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] like Figure 1 and Figure 2 As shown, a rail transit section drainage pump station according to an embodiment of the present invention comprises a first pressure drainage main pipe 1, a second pressure drainage main pipe 2 and a roadbed drainage ditch 3, wherein the first pressure drainage main pipe 1 is arranged in a left-line section tunnel 10; the second pressure drainage main pipe 2 is arranged in a right-line section tunnel 20 adjacent to the left-line section tunnel 10, and a communication channel 50 is arranged between the left-line section tunnel 10 and the right-line section tunnel 20; a roadbed drainage ditch 3 is respectively arranged in the left-line section tunnel 10 and the right-line section tunnel 20, the roadbed drainage ditch 3 is arranged inside the roadbed 30, and at least two submersible pump groups are arranged in the roadbed drainage ditch 3; at least a part of the submersible pump groups of the at least two submersible pump groups are connected in parallel to one of the first pressure drainage main pipe 1 and the second pressure drainage main pipe 2, and the other part of the at least two submersible pump groups of the at least two submersible pump groups are connected in parallel and cross the communication channel 50 between the left-line section tunnel 10 and the right-line section tunnel 20, and are connected to the other of the first pressure drainage main pipe 1 and the second pressure drainage main pipe 2. The accumulated water in the left-line section tunnel 10 can be discharged through the first pressure drainage pipe 1 and the second pressure drainage pipe 2 respectively; the accumulated water in the right-line section tunnel 20 can be discharged through the first pressure drainage pipe 1 and the second pressure drainage pipe 2 respectively. The first pressure drainage pipe 1 and the second pressure drainage pipe 2 are both connected to the main wastewater pool outside the rail transit section.

[0027] The present invention sets at least two submersible pump groups in a ballast ditch 3, and cross-arranges the submersible pump group in the same ballast ditch 3 with the first pressure drainage pipe 1 and the second pressure drainage pipe 2. On the one hand, the flow rate of each submersible pump in the submersible pump group can be effectively reduced, thereby reducing the effective volume of the required ditch. Since the flow rate of the submersible pump is reduced, the size of the equipment itself is reduced, which is conducive to installation in a narrow ballast ditch, and no special steel pipe segments are required. The reduction in the effective volume of the ditch reduces the setting length of the ditch, reduces the impact on the ballast structure, and improves the overall lateral stability of the ballast. On the other hand, the submersible pump group in the single-track section tunnel is respectively connected to the first pressure drainage pipe and the second pressure drainage pipe, which can enhance the safety and reliability of drainage.

[0028] Preferably, each of the submersible pump groups includes at least two submersible pumps, and the submersible pumps in the same submersible pump group are arranged in parallel. When one or more of the submersible pumps in the same submersible pump group are in the startup state, the other submersible pumps in the same submersible pump group are in the standby state. It should be noted that the submersible pumps in the same submersible pump group can also be in the startup state at the same time.

[0029] In this embodiment, the ballast water collection ditch 3 is arranged at the center of the ballast 30, at the lowest point of the shield segment 40, so as to collect water. Furthermore, a pump pit 31 for installing a submersible pump is arranged in the ballast water collection ditch 3, and a plurality of pump pits 31 are arranged at intervals, and the bottom elevation of the pump pit 31 is lower than the bottom elevation of the ballast water collection ditch 3.

[0030] In this embodiment, the bottom surface of the water pump pit 31 is flush with the surface of the shield segment 40 of the left-line section tunnel 10 or the right-line section tunnel 20. Furthermore, the bottom surface of the roadbed water collection ditch 3 is about 150 mm higher than the bottom surface of the water pump pit 31.

[0031] In this embodiment, the roadbed water collecting ditch 3 is arranged at the lowest point section of the left-line section tunnel 10 or the right-line section tunnel 20. Furthermore, two ends of the roadbed water collecting ditch 3 are respectively connected to a cross-sectional ditch 8.

[0032] In this embodiment, two submersible pump groups are arranged in the ballast water collecting ditch 3, each of which includes two submersible pumps, and the flow rate of the submersible pump is 10m 3 / h. Compared with the conventional submersible pump flow rate of 20m 3 / h, the flow rate of the submersible pump of the present invention can be reduced by 50%, the effective volume of the sump can be reduced by 50%, and the effective volume of the sump can be reduced from 5m 3 Reduced to 2.5m 3 , reducing the impact of the ditch on the overall structure of the roadbed.

[0033] Specifically, the two submersible pump groups in the roadbed ditch 3 in the left-line section tunnel 10 are represented by the first submersible pump group 4 and the second submersible pump group 5, respectively, and the two submersible pump groups in the roadbed ditch 3 in the right-line section tunnel 20 are represented by the third submersible pump group 6 and the fourth submersible pump group 7, respectively. The first submersible pump group 4 is arranged in parallel with the first submersible pump 41 and the second submersible pump 42, the second submersible pump group 5 is arranged in parallel with the third submersible pump 51 and the fourth submersible pump 52, the third submersible pump group 6 is arranged in parallel with the fifth submersible pump 61 and the sixth submersible pump 62, and the fourth submersible pump group 7 is arranged in parallel with the seventh submersible pump 71 and the eighth submersible pump 72. Among them, the first submersible pump 41, the second submersible pump 42, the seventh submersible pump 71, and the eighth submersible pump 72 are connected in parallel to the first pressure drainage main pipe 1, and the third submersible pump 51, the fourth submersible pump 52, the fifth submersible pump 61, and the sixth submersible pump 62 are connected in parallel to the second pressure drainage main pipe 2.

[0034] When in use, the two submersible pump groups in the same ballast ditch 3 are started in sequence, and the two submersible pumps in the same submersible pump group are used as a backup and the other as a standby, and are started simultaneously when necessary. Under normal circumstances, the two submersible pump groups in the same ballast ditch 3 are not started at the same time. For example, according to the required water flow, any submersible pump in the first submersible pump group 4 and any submersible pump in the third submersible pump group 6 can be started; or two submersible pumps in the first submersible pump group 4 and two submersible pumps in the third submersible pump group 6 can be started. In the case of fire water, the first submersible pump group, four submersible pumps in the second submersible pump group, and any submersible pump in the third submersible pump group or the fourth submersible pump group can be started. Or the four submersible pumps in the third submersible pump group and the fourth submersible pump group, and any submersible pump in the first submersible pump group can be started.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A rail transit section drainage pump station, characterized in that: include: A first pressure drainage main pipe, which is arranged in the left-line section tunnel; A second pressure drainage main pipe, which is arranged in the right-line section tunnel; The ballast drainage ditch is arranged inside the ballast, and at least two submersible pump groups are arranged in the ballast drainage ditch; at least one part of the two submersible pump groups is connected in parallel to one of the first pressure drainage main pipe and the second pressure drainage main pipe, and at least another part of the two submersible pump groups is connected in parallel and crosses the communication channel between the left-line section tunnel and the right-line section tunnel, and is connected to the other of the first pressure drainage main pipe and the second pressure drainage main pipe; the submersible pump group in the same ballast drainage ditch is cross-arranged with the first pressure drainage main pipe and the second pressure drainage main pipe.

2. The rail transit section drainage pump station according to claim 1, characterized in that: Each of the submersible pump groups includes at least two submersible pumps, and the submersible pumps in the same submersible pump group are arranged in parallel.

3. The rail transit section drainage pump station according to claim 2, characterized in that: Two submersible pump groups are arranged in the ballast water collection ditch, each of which includes two submersible pumps, and the flow rate of the submersible pump is 10m 3 / h.

4. The rail transit section drainage pump station according to claim 1, characterized in that: The ballast bed water collecting ditch is arranged at the center position of the ballast bed.

5. The rail transit section drainage pump station according to claim 4, characterized in that: A water pump pit is arranged in the ballast water collecting ditch, and the bottom elevation of the water pump pit is lower than the bottom elevation of the ballast water collecting ditch.

6. The rail transit section drainage pump station according to claim 5, characterized in that: The bottom surface of the water pump pit is flush with the surface of the shield segment of the left-line section tunnel or the right-line section tunnel.

7. The rail transit section drainage pump station according to claim 1, characterized in that: The roadbed drainage ditch is arranged at the lowest point section of the left-line section tunnel or the right-line section tunnel.

8. The rail transit section drainage pump station according to claim 7, characterized in that: Two ends of the ballast water collecting ditch are respectively connected with a cross-cutting ditch.

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