A mechanical shield-separated island subway station drainage system

Abstract

The present invention provides a mechanical shield-bored separated island-type subway station drainage system, which includes a left-line shield tunnel body, a right-line shield tunnel body, a platform shield tunnel body, a left-line local water collection well, a right-line local water collection well, a wastewater pump room and a wastewater tank; the present invention fully utilizes the existing space of the shield according to the space limitations of the shield form, rationally plans and collects station drainage such as structural seepage, firefighting wastewater, and flushing water, does not need to add a separate wastewater pump room while meeting the use requirements, utilizes existing conditions and innovates thinking, has a reasonable wastewater outlet, and the wastewater pipeline laying method is convenient for construction, installation and daily maintenance and repair, and has good social and economic benefits.

Description

Technical Field

[0001] The present invention belongs to the technical field of shield station drainage, and in particular relates to a mechanical shield separation island-type subway station drainage system. Background Art

[0002] With the continuous development of urbanization, urban rail transit construction is increasing to develop infrastructure and alleviate urban traffic pressure, and station construction types are becoming increasingly diverse. Due to the generation of structural seepage, flushing wastewater, and firefighting wastewater in underground stations, wastewater drainage at the lowest point within the station, particularly in shield-bored tunnel construction, has attracted considerable attention. Current engineering practice and publicly available technical documents show that wastewater drainage technologies for stations constructed using open-cut, underground, and mining methods are prevalent, while those for shield-bored tunnel construction, particularly shield-bored island-type stations, are relatively limited. Drawing on existing wastewater drainage technologies for common station types, common drainage technologies for both open-cut and underground stations include: installing a wastewater pumphouse at the lowest point of the single slope in island-type stations; and installing separate wastewater pumphouses on either side of the platform in side-type stations. Due to their distinct design, shield-bored island-type stations cannot replicate the drainage concepts of conventional stations in terms of wastewater pumphouse placement and drainage methods. Therefore, research and innovation are needed to explore new drainage strategies for this type of station. Summary of the Invention

[0003] To address the deficiencies of the above-mentioned prior art, the present invention provides a mechanical shield-separated island-type subway station drainage system. The purpose is to provide an innovative design based on existing engineering applications and publicly available technical documents. Combining existing subway station drainage technology with practical engineering applications, the present invention proposes a wastewater pump room layout and drainage system that can reduce the number of shield-separated island-type wastewater pump rooms, reduce the number of drainage equipment and pipelines required, and solve the problem of smooth drainage in shield-separated island-type subway stations. The specific technical solution is as follows:

[0004] A mechanical shield-bored separated island subway station drainage system comprises a platform shield tunnel body, a left-line shield tunnel body, and a right-line shield tunnel body. The left-line shield tunnel body and the right-line shield tunnel body are symmetrically arranged relative to the platform shield tunnel body; a wastewater pump room is provided in the equipment area within the platform shield tunnel body, a wastewater tank is provided below the wastewater pump room, a main drainage pump is provided in the wastewater tank, the main drainage pump is connected to an external drainage network through a first pressure wastewater pipe, and the wastewater pump room in the platform shield tunnel body is provided with a wastewater pump room. Floor drains are provided on both sides, the floor drains are connected to the drainage riser, and the drainage riser is connected to the wastewater tank through the second drainage ditch; a left-line local water collection well is provided in the left-line shield tunnel body, and first drainage ditches are provided on both sides of the track area in the left-line shield tunnel body to collect structural seepage in the left-line shield body; a cross ditch is provided at the lowest point in the left-line shield tunnel body, and the cross ditch is connected to the first drainage ditch and connected to the left-line local water collection well; the right-line shield tunnel body has the same structural layout as the left-line shield tunnel body.

[0005] Furthermore, the left-line local water collection well is located at the lowest point of the slope in the main body of the left-line shield tunnel, close to the platform side.

[0006] Furthermore, a local drainage pump is provided in the left-line local water collection well, and the local drainage pump is connected to the wastewater tank through a second pressure wastewater pipe.

[0007] Furthermore, the cross ditch and the second drainage ditch are both set to a slope of 5‰.

[0008] Furthermore, the wastewater pool is formed by backfilling the inner cavity of the space below the platform shield tunnel body with plain concrete.

[0009] Furthermore, the first pressure wastewater pipe enters the exhaust duct through the equipment area walkway, is laid along the exhaust duct to the outside of the station, and is then connected to the external drainage network.

[0010] Furthermore, the wastewater pump room and wastewater pool are arranged at the lowest point of the main equipment area of ​​the platform shield tunnel.

[0011] Furthermore, a waterproof sleeve is installed on the side wall of the exhaust duct structure into which the first pressure wastewater pipe enters.

[0012] Furthermore, there are two main drainage pumps and local drainage pumps, one for use and one for backup.

[0013] Furthermore, the second drainage ditch is arranged under the platform plate of the platform shield tunnel main body.

[0014] Beneficial effects of the present invention:

[0015] (1) In combination with the existing conventional design, according to the space limitations of the shield form, the existing space of the shield is fully utilized, and station drainage such as structural seepage, firefighting wastewater, and flushing water are rationally planned and collected. No separate wastewater pump room is added under the premise of meeting the use requirements.

[0016] (2) There is no need to construct a wastewater pool on the shield bottom plate, which avoids the structural risks and reduces the civil engineering risks, construction costs and construction risks.

[0017] (3) By setting up local water collection wells, the wastewater from the two lines can be collected uniformly. A wastewater pump room can be set up in the platform equipment area to carry out relay drainage. There is no need to set up a separate wastewater pump room in each shield line.

[0018] (4) Reduce the number of water pumps and the installation workload of accessories such as pipelines, and reduce the cost and difficulty of mechanical, electrical and civil engineering.

[0019] (5) The wastewater pipeline is laid to the tunnel exit in a reasonable manner and connected to the municipal drainage system, and the wastewater outlet is reasonable.

[0020] (6) The wastewater pipeline laying method is convenient for construction and installation as well as future pipeline repair and maintenance, and has good social and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] In the figure: 1. Main body of left-line shield tunnel; 2. Main body of right-line shield tunnel; 3. Main body of platform shield tunnel; 4. Local water collection well of left line; 5. Local water collection well of right line; 6. Wastewater pump room; 7. Wastewater tank; 8(8'), first drainage ditch; 9(9'), cross ditch; 10(10'), second pressure wastewater pipe; 11(11'), floor drain; 12(12'), drainage riser; 13(13'), second drainage ditch; 14, first pressure wastewater pipe; 15, plain concrete; 16, drainage main pump; 17, local drainage pump. DETAILED DESCRIPTION

[0023] The following will be combined with the present invention Figure 1 ,in Figure 1 The following is a schematic diagram of the structure of the present invention; it clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0024] like Figure 1As shown, a mechanical shield-bored separated island subway station drainage system includes a platform shield tunnel body 3, a left-line shield tunnel body 1, and a right-line shield tunnel body 2. A wastewater pump room 6 is provided in the platform shield tunnel body 3, and a wastewater tank 7 is provided in the wastewater pump room 6. The wastewater pump room 6 and the wastewater tank 7 are arranged at the lowest point of the equipment area of ​​the platform shield tunnel body 3. A drainage main pump 16 is provided in the wastewater tank 7. The drainage main pump 16 is a one-in-one standby arrangement. The drainage main pump 16 is driven by a first pressure The wastewater pipe 14 is connected to the external drainage network. The first pressure wastewater pipe 14 enters the exhaust duct through the equipment area walkway, is laid along the exhaust duct to the outside of the station, and then connected to the external drainage network. Since the station wastewater pump room 6 is located at the lowest point of the station, the burial depth here is deep. If the pressure wastewater pipe directly passes through the station from the place where the wastewater tank 7 is arranged, it will face problems such as no outlet for wastewater or deep burial depth, and difficult pipeline maintenance. The pressure wastewater pipe is laid through the station equipment area to the exhaust duct outlet, the wastewater outlet is reasonable, and it is convenient for construction and simple to maintain.

[0025] A waterproof sleeve is installed on the exhaust duct structure wall where the first pressure wastewater pipe 14 enters, and a floor drain 11 (11') is provided in the platform shield tunnel body 3. The floor drain 11 (11') is connected to the drainage riser 12 (12'), which optimizes the effective volume of the left-line local water collection well 4 and the right-line local water collection well 5, and avoids the risk and cost of sinking to increase the water collection well volume due to insufficient space under the left and right-line shield track areas. The drainage riser 12 (12') is connected to the wastewater tank 7 through the second drainage ditch 13 (13'). The second drainage ditch A ditch 13 (13') is set under the platform plate of the platform shield tunnel main body 3 to discharge various types of wastewater within the platform shield tunnel main body 3 into the wastewater pool 7. The slope of the second drainage ditch 13 (13') is set to 5‰, which is convenient for better draining the wastewater in the second drainage ditch 13 (13') into the wastewater pool 7. The wastewater pool 7 is formed by backfilling the inner cavity of the space below the platform shield tunnel main body 3 with plain concrete 15, making full use of the inner cavity of the space below the shield and avoiding the structural risks caused by sinking excavation of the shield structure.

[0026] The left-line shield tunnel body 1 and the right-line shield tunnel body 2 are symmetrically arranged relative to the platform shield tunnel body 3. A left-line local water collection well 4 is provided in the left-line shield tunnel body 1. The left-line local water collection well 4 is arranged in the left-line shield tunnel body 1 near the platform side. A first drainage ditch 8 (8') is provided on both sides of the track area in the left-line shield tunnel body 1 to collect structural seepage in the left-line shield tunnel body. A cross ditch 9 (9') is provided at the lowest point in the left-line shield tunnel body 1. The slope of the cross ditch 9 (9') is set to 5‰. The drainage ditch is connected to the left-line local water collection well 4 through the cross ditch 9 (9'). The cross ditch 9 (9') is provided with a slope. The degree and the wastewater in the first drainage ditch 8 (8') are intercepted, and the cross ditch 9 (9') discharges the structural wastewater in the first drainage ditch 8 (8') into the left-line local water collection well 4. The left-line local water collection well 4 is provided with a local drainage pump 17, and the local drainage pump 17 has two units, one for use and one for standby. The local drainage pump 17 is connected to the wastewater pump room 6 through the second pressure wastewater pipe 10 (10'), and discharges the structural seepage water in the left-line local water collection well 4 into the wastewater pool 7; the left-line shield tunnel body 1 and the right-line shield tunnel body 2 are identical in structural setting, and the drainage method of the right-line shield tunnel body 2 is symmetrical and consistent with the drainage method of the left-line shield tunnel body 1.

[0027] Working principle of the present invention:

[0028] First, the first drainage ditch 8 (8') collects the structural seepage water in the left-line shield tunnel body 1, and flows it into the left-line local water collection well 4 through the cross ditch 9 (9'). The left-line local water collection well 4 is provided with a local drainage pump 17. The local drainage pump 17 transports the seepage wastewater to the wastewater tank 7 in the wastewater pump room 6 through the second pressure wastewater pipe 10 (10'). The working principle of the right-line shield tunnel body 2 is symmetrical with that of the left-line shield tunnel body 1; secondly, the floor drain 11 (11') in the platform shield tunnel body 3 flows the firefighting wastewater, structural seepage water and flushing wastewater in the platform shield tunnel body 3 into the second drainage ditch 13 (13') through the drainage riser 12 (12'), and finally flows into the wastewater tank 7; finally, the drainage main pump 16 in the wastewater tank 7 transports various types of wastewater through the first pressure wastewater pipe 14, through the exhaust duct and finally into the external drainage network.

[0029] The above is only a preferred embodiment of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that several improvements and modifications can be made without departing from the concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. A mechanical shield-separated island subway station drainage system, characterized in that: It includes a platform shield tunnel body, a left-line shield tunnel body, and a right-line shield tunnel body. The left-line shield tunnel body and the right-line shield tunnel body are symmetrically arranged relative to the platform shield tunnel body; a wastewater pump room is provided in the equipment area of ​​the platform shield tunnel body, and a wastewater tank is provided below the wastewater pump room. The wastewater tank is formed by backfilling the inner cavity of the space below the platform shield tunnel body with plain concrete; a drainage main pump is provided in the wastewater tank, and the drainage main pump is connected to the external drainage network through a first pressure wastewater pipe. Floor drains are provided on both sides of the wastewater pump room in the platform shield tunnel body, and the wastewater pump room and the wastewater tank are arranged in the platform shield tunnel body. At the lowest point of the equipment area, the floor drain is connected to the drainage riser, and the drainage riser is connected to the wastewater tank through the second drainage ditch; a left-line local water collection well is provided in the left-line shield tunnel body, and a local drainage pump is provided in the left-line local water collection well, and the local drainage pump is connected to the wastewater tank through the second pressure wastewater pipe; first drainage ditches are provided on both sides of the track area in the left-line shield tunnel body to collect structural seepage in the left-line shield body, and a cross ditch is provided at the lowest point in the left-line shield tunnel body, and the cross ditch is connected to the first drainage ditch and connected to the left-line local water collection well; the right-line shield tunnel body has the same structural layout as the left-line shield tunnel body.

2. The mechanical shield-bored island-type subway station drainage system according to claim 1 is characterized by: The left-line local water collection well is located at the lowest point of the slope in the main body of the left-line shield tunnel, close to the platform side.

3. The mechanical shield-bored island-type subway station drainage system according to claim 1 is characterized by: The cross ditch and the second drainage ditch are both set to a slope of 5‰.

4. The mechanical shield-bored island-type subway station drainage system according to claim 1 is characterized by: The first pressure wastewater pipe enters the exhaust duct through the equipment area walkway, is laid along the exhaust duct to the outside of the station, and is then connected to the external drainage network.

5. The mechanical shield-bored island-type subway station drainage system according to claim 4 is characterized by: A waterproof sleeve is installed on the side wall of the exhaust duct structure into which the first pressure wastewater pipe enters.

6. The mechanical shield-bored island-type subway station drainage system according to claim 1 is characterized by: The main drainage pump and the local drainage pump are provided in two sets, one for use and one for backup.

7. The mechanical shield-bored island-type subway station drainage system according to claim 1 is characterized by: The second drainage ditch is arranged under the platform plate of the platform shield tunnel main body.

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