A tunnel drainage system based on a mechanical connection channel and its control method

Abstract

The present invention relates to the technical field of tunnel traffic, and discloses a tunnel drainage system based on a mechanical connection passage and a control method thereof. The tunnel structure includes an up-tunnel, a down-tunnel and a mechanical connection passage; the tunnel drainage system includes a sump, a negative-pressure water suction assembly and a positive-pressure water drainage assembly; the up-tunnel and the down-tunnel are connected through the mechanical connection passage, and the lowest horizontal height of the mechanical connection passage is higher than the lowest horizontal heights of the up-tunnel and the down-tunnel; the sump is arranged at the lowest points of the up-tunnel and the down-tunnel, and the lowest horizontal height of the sump is lower than the lowest horizontal heights of the up-tunnel and the down-tunnel; the negative-pressure water suction assembly includes a self-suction pipe, and the water suction port of the self-suction pipe extends into the sump and is flush with the lowest water level surface of the sump; the positive-pressure water drainage assembly includes a submersible pump, and the submersible pump is arranged in the sump. Based on the above solution, the present invention can avoid the influence of accumulated water on the roadbed and rails in the tunnel.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit, and in particular to a tunnel drainage system based on a mechanical connection channel and a control method thereof. Background Art

[0002] The principle of shield tunnel drainage in rail transit engineering is to set up a drainage pumping station at the lowest point, so that seepage water and fire fighting wastewater are collected along the longitudinal slope to the sump of the pumping station through the line drainage ditch, and then pumped out to the outside through a water pump. Taking the subway project as an example, usually a connection channel is set between two single-track tunnels. The connection channel is a channel connecting the upper and lower running tunnels on the same line. In case of disasters or accidents such as fires in the tunnel, it is used for personnel to evacuate safely from the accident tunnel to the non-accident tunnel. In view of the inevitability of the connection channel setting, traditional drainage pumping stations are generally combined with the channel. The lower space of the channel is used to set up a large sump that meets the installation and operation requirements of submersible pumps by the freezing method, and then the sump is connected to the grit chamber at the low point of the line drainage ditch in the tunnel through a pipeline, and the collected wastewater is lifted out of the tunnel by a submersible pump. In recent years, with the large-scale construction of rail transit projects, a new mechanical connection channel construction technology using the shield method or the pipe jacking method has been proposed. Compared with the traditional mining method construction technology, the mechanical connection channel construction technology has a short construction period, a stable formed structure, a safe and controllable operation environment, and a high degree of mechanization, and has become the development trend of the connection channel construction technology in rail transit projects.

[0003] After the mechanical connection channel is completed, the overall cross-section is a regular circle, and it no longer has the conditions for excavating a large wastewater pool by freezing at the bottom and building a traditional wastewater pumping station. In view of this actual environment, some rail transit projects increase the depth and width of the central drainage ditch locally at the low points of the upper and lower tunnels, and set up a sump that meets the water pump regulation volume requirement and is suitable for the installation of 8-10 submersible pumps at each place to realize the basic function of the drainage pumping station. However, the problem is that limited by the drainage performance of the submersible pump, the current submersible pump cannot drain all the shallow accumulated water at the low liquid level in the sump, and there will still be a lot of accumulated water remaining in the sump. The long-term accumulated water in the more than ten-meter-long sump invades the roadbed and rail, affecting the roadbed and rail. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a tunnel drainage system based on a mechanical connection channel and a control method thereof.

[0005] In a first aspect, the present invention provides a tunnel drainage system based on a mechanical connection channel, which is applied to a tunnel structure based on a mechanical connection channel. The tunnel structure includes an upper tunnel, a lower tunnel and a mechanical connection channel; the tunnel drainage system includes a suction pit, a negative pressure suction component and a positive pressure drainage component;

[0006] The upstream tunnel and the downstream tunnel are connected through the mechanical connection passage, and the lowest horizontal height of the mechanical connection passage is higher than the lowest horizontal heights of the upstream tunnel and the downstream tunnel;

[0007] The sump is arranged at the lowest points of the upstream tunnel and the downstream tunnel, and the lowest horizontal height of the sump is lower than the lowest horizontal heights of the upstream tunnel and the downstream tunnel;

[0008] The negative pressure water suction assembly includes a self-priming pipe, and the water suction port of the self-priming pipe extends into the sump and is flush with the lowest water level surface of the sump;

[0009] The positive pressure drainage assembly includes a submersible pump, and the submersible pump is arranged in the sump.

[0010] Optionally, the tunnel drainage system further includes a main drainage pipe; the negative pressure water suction assembly further includes a self-priming pump; the positive pressure drainage assembly further includes a discharge pipe;

[0011] The self-priming pump is connected between the self-priming pipe and the main drainage pipe;

[0012] The discharge pipe is connected between the submersible pump and the main drainage pipe.

[0013] Optionally, the tunnel drainage system further includes a main control assembly;

[0014] The main control assembly is electrically connected to the negative pressure water suction assembly and the positive pressure drainage assembly;

[0015] The main control assembly is fixed on the side wall of the mechanical connection passage;

[0016] The main control assembly is used to control the drainage of the negative pressure water suction assembly and / or the positive pressure drainage assembly.

[0017] Optionally, the tunnel drainage system further includes a liquid level gauge;

[0018] The liquid level gauge is arranged in the sump;

[0019] The liquid level gauge is electrically connected to the main control assembly;

[0020] The main control assembly is further used to control the drainage of the negative pressure water suction assembly and / or the positive pressure drainage assembly based on the accumulated water level measured by the liquid level gauge.

[0021] In a second aspect, the present invention further provides a control method for a tunnel drainage system based on a mechanical connection passage, which is applied to a tunnel drainage system based on a mechanical connection passage according to any one of the first aspect, and the control method includes:

[0022] Control the negative pressure water suction assembly and / or the positive pressure water drainage assembly to drain the accumulated water in the sump.

[0023] Optionally, controlling the negative pressure water suction assembly to drain the accumulated water in the sump includes:

[0024] Determine the accumulated water level in the sump based on a level gauge;

[0025] When it is determined that the accumulated water level reaches a first level, control the negative pressure water suction assembly to drain the accumulated water in the sump.

[0026] Optionally, at least two submersible pumps are arranged in each sump; after determining that the accumulated water level reaches the first level and controlling the negative pressure water suction assembly to drain the accumulated water in the sump, it further includes:

[0027] Based on the accumulated water level reaching a second level and the negative pressure water suction assembly being in an operating state, control the negative pressure water suction assembly to stop operating and control one of the submersible pumps to drain the accumulated water in the sump;

[0028] Wherein, the second level is higher than the first level.

[0029] Optionally, after controlling the negative pressure water suction assembly to stop operating and controlling one of the submersible pumps to drain the accumulated water in the sump, it further includes:

[0030] Based on the accumulated water level reaching a third level and one of the submersible pumps being in an operating state, control at least two of the submersible pumps to drain the accumulated water in the sump;

[0031] Wherein, the third level is higher than the second level.

[0032] Optionally, after controlling at least two of the submersible pumps to drain the accumulated water in the sump, it further includes:

[0033] Based on the accumulated water level reaching a fourth level and all the submersible pumps being in an operating state, control all the submersible pumps and the negative pressure water suction assembly to drain the accumulated water in the sump;

[0034] Wherein, the fourth level is higher than the third level.

[0035] The present invention has the following technical effects:

[0036] The present invention specifically provides a water absorption pit for water accumulation at the lowest points of the upstream tunnel and the downstream tunnel, concentrates the accumulated water in the upstream tunnel and the downstream tunnel into their respective water absorption pits, and then sucks out the accumulated water in the water absorption pits through a dedicated negative pressure water absorption component. Since the negative pressure water absorption component sucks out the accumulated water in the water absorption pit through a dedicated self - suction pipe, and the water suction port of the self - suction pipe is flush with the lowest water level surface of the water absorption pit, the effect of completely discharging the accumulated water in the water absorption pit can be achieved. In addition, the present invention also additionally provides a positive pressure drainage component to discharge the accumulated water in the water absorption pit through a drainage pump. Based on the respective characteristics of the negative pressure water absorption component and the positive pressure drainage component, the negative pressure water absorption component can empty the accumulated water in the water absorption pit to a greater extent, while the positive pressure drainage component can discharge the accumulated water with higher efficiency. Based on the above - mentioned scheme, the present invention can quickly and thoroughly discharge the accumulated water through the effective combination of the negative pressure water absorption component and the positive pressure drainage component.

[0037] In summary, since the accumulated water in the upstream tunnel and the downstream tunnel is completely emptied, it can no longer affect the roadbed and steel rails in the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following - described drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0039] Figure 1 It is a schematic cross - sectional view of a tunnel structure based on a mechanical connection channel along a direction perpendicular to the extension direction of the tunnel structure provided by an embodiment of the present invention;

[0040] Figure 2 It is a top - view of the structure of a tunnel drainage system based on a mechanical connection channel provided by an embodiment of the present invention;

[0041] Figure 3 It is a cross - sectional view of the structure of a tunnel drainage system based on a mechanical connection channel along a direction perpendicular to the extension direction of the tunnel structure provided by an embodiment of the present invention.

[0042] REFERENCE NUMERALS

[0043] 2. Negative pressure water absorption component; 3. Positive pressure drainage component; 4. Drainage main pipe; 5. Water absorption pit; 6. Mechanical connection channel; 701. Upstream tunnel; 702. Downstream tunnel; 101. Liquid level gauge; 102. Signal cable; 103. Control cable; 104. Main control component; 201. Self - priming pump; 202. Self - suction pipe; 203. Electric control valve; 204. Self - priming pump outlet pipe; 301. Submersible pump; 302. Outlet pipe. Detailed implementation manners

[0044] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope protected by the present invention.

[0045] Figure 1 It is a schematic diagram of a tunnel structure provided for an embodiment of the present invention based on a mechanical connection channel. As Figure 1 shown, Figure 1 It is a schematic cross-sectional view of the tunnel structure along a direction perpendicular to the extension direction of the tunnel structure. In this structure, the horizontal height of the mechanical connection channel 6 is higher than the horizontal heights of the upstream tunnel 701 and the downstream tunnel 702. In this structure, the sump for water collection of the tunnel drainage system cannot be arranged in the mechanical connection channel 6 any more. Therefore, in the prior art solutions, sumps and submersible pumps are generally arranged in the upstream tunnel 701 and the downstream tunnel 702 to achieve the purpose of drainage. However, through practical research, it is found that based on the characteristics of the submersible pump, its drainage liquid level is relatively high. Therefore, when the liquid level in the sump reaches a certain height, the submersible pump can no longer continue to drain water. However, the accumulated water remaining in the sump can still contact the roadbed and the rails, which may affect the roadbed and the rails, such as causing corrosion to the rails, etc.

[0046] To solve the above technical problems, an embodiment of the present invention provides a tunnel drainage system based on a mechanical connection channel. Figure 2 It is a schematic diagram of the structure of a tunnel drainage system provided for an embodiment of the present invention based on a mechanical connection channel, Figure 3 It is a schematic diagram of the structure of a tunnel drainage system provided for an embodiment of the present invention based on a mechanical connection channel. Specifically, Figure 2 It is a top view, Figure 3 It is a cross-sectional view along a direction perpendicular to the extension direction of the tunnel structure. This tunnel drainage system is applied to a tunnel structure based on the mechanical connection channel 6, and the tunnel structure includes an upstream tunnel 701, a downstream tunnel 702 and a mechanical connection channel 6. The tunnel drainage system includes a suction pit 5, a negative pressure suction assembly 2 and a positive pressure drainage assembly 3.

[0047] The upstream tunnel 701 and the downstream tunnel 702 are connected through the mechanical connection channel 6, and the lowest horizontal height of the mechanical connection channel 6 is higher than the lowest horizontal heights of the upstream tunnel 701 and the downstream tunnel 702.

[0048] The sump 5 is arranged at the lowest point of the upstream tunnel 701 and the downstream tunnel 702, and the lowest horizontal height of the sump 5 is lower than the lowest horizontal height of the upstream tunnel 701 and the downstream tunnel 702.

[0049] The negative pressure water suction assembly 2 includes a self - suction pipe 202, and the water suction port of the self - suction pipe 202 extends into the sump 5 and is flush with the lowest water level surface of the sump 5.

[0050] The positive pressure water drainage assembly 3 includes a submersible pump 301, and the submersible pump 301 is arranged in the sump 5.

[0051] For the convenience of description of the present invention, on the premise that there is no special description requirement, the embodiments of the present invention are described by taking the upstream tunnel 701 as an example only. The structure and implementation principle in the downstream tunnel 702 and the upstream tunnel 701 (regarding the tunnel drainage system) can be the same or similar.

[0052] As Figure 2 and Figure 3 shown, the negative pressure water suction assembly 2 represents a functional assembly that can suck out the accumulated water in the sump 5 through the self - suction pipe 202 based on the action of negative pressure. Because the lowest horizontal height of the sump 5 is lower than the lowest horizontal height of the upstream tunnel 701, the accumulated water in the upstream tunnel 701 can be concentrated into the sump 5 uniformly. Further, the accumulated water in the sump 5 can be completely drained through the self - suction pipe 202, or drained to a liquid level where the roadbed and rails cannot be contacted. Therefore, the embodiments of the present invention can avoid the influence of the accumulated water in the tunnel structure on the roadbed and rails through the above - mentioned technical solutions.

[0053] In addition, since the extension length of the tunnel structure may be relatively long, for this, the embodiments of the present invention can divide the tunnel structure into multiple sections based on a certain distance benchmark, and each section is provided with a tunnel drainage system, a sump 5 and a mechanical connection channel 6.

[0054] In addition to the negative pressure water suction system, the embodiments of the present invention can also set a positive pressure water drainage system to act together with the negative pressure drainage system. In the embodiments of the present invention, the negative pressure water suction system can completely drain the accumulated water in the sump 5, but its working principle is to extend the relatively long self - suction pipe 202 into the sump 5. Therefore, generally speaking, the drainage capacity of the negative pressure water suction system is weaker than that of the positive pressure water drainage assembly 3 composed of the submersible pump 301. The drainage capacity of the submersible pump 301 is strong, and the drainage volume of a single submersible pump 301 can be 20 - 25m 3Between / h, it can quickly drain the accumulated water in the sump 5 when the liquid level in the sump 5 is high or the liquid level in the sump 5 rises rapidly, reducing the liquid level in the sump 5. Additionally, the submersible pump 301 can be used for water suction when the water level is high, causing the submersible pump 301 to be immersed in the accumulated water, thereby obtaining a better water-cooling effect for the pump body and increasing the equipment lifespan.

[0055] By combining the positive-pressure drainage component 3 and the negative-pressure water suction component 2, it is possible to achieve both the effect of quickly draining the accumulated water in certain situations and completely draining the accumulated water in the sump 5.

[0056] Continue to refer to Figure 2 and Figure 3 , in some embodiments, the tunnel drainage system further includes a main drainage pipe 4. The negative-pressure water suction component 2 further includes a self-priming pump 201. The positive-pressure drainage component 3 further includes a water outlet pipe 302.

[0057] The self-priming pump 201 is connected between the self-priming pipe 202 and the main drainage pipe 4.

[0058] The water outlet pipe 302 is connected between the submersible pump 301 and the main drainage pipe 4.

[0059] As Figure 2 and Figure 3 shown, the self-priming pump 201 is used to form a negative pressure, and then drain the accumulated water in the sump 5 through the self-priming pipe 202. After the accumulated water is drained by the self-priming pump 201 and / or the submersible pump 301, it can be further transferred into the main drainage pipe 4. The main drainage pipe 4 can be arranged in the upward tunnel 701 and finally extend outside the tunnel along the extension direction of the upward tunnel 701, thereby realizing draining the accumulated water outside the tunnel. Among them, the self-priming pump 201 is connected to the main drainage pipe 4 through the self-priming pump outlet pipe 204.

[0060] Among them, the self-priming pump 201 can be fixed on the side wall of the mechanical connection passage 6. The size of this mechanical connection passage may be small, and this mechanical connection passage 6 is also used for personnel evacuation during accidents. Therefore, it is not appropriate to set the size of the devices arranged in the mechanical connection passage 6 to be too large. The number of self-priming pumps 201 can be two. The two self-priming pumps 201 can operate independently or jointly. The drainage flow rate of a single self-priming pump 201 can be less than 5m 3 / h, so as to ensure that the self-priming pump 201 has a small external dimension and can suck the accumulated water in the sump 5 to a very low liquid level, ensuring a good environment at the low point of the tunnel, and avoiding the ballast surface being immersed in water for a long time and the rail being corroded.

[0061] Continue to refer to Figure 2 , in some embodiments, the tunnel drainage system further includes a main control component 104.

[0062] The main control component 104 is electrically connected to the negative pressure water suction component 2 and the positive pressure water drainage component 3.

[0063] The main control component 104 is fixed on the side wall of the mechanical connection passage 6.

[0064] The main control component 104 is used to control the negative pressure water suction component 2 and / or the positive pressure water drainage component 3 to drain water.

[0065] Specifically, the main control component 104 represents a functional component for controlling the negative pressure water suction component 2 and the positive pressure water drainage component 3. In addition, Figure 2 the control cable 103 is also shown in the figure. The control cable 103 is used to electrically connect the submersible pump 301 to the main control component 104, and to electrically connect the negative pressure water suction component 2 to the main control component 104. For example, Figure 2 the negative pressure water suction component 2 is shown in the figure and may include an electric control valve 203 and a self-priming pump 201. The electric control valve 203 and the self-priming pump 201 can be electrically connected to the main control component 104 through the control cable 103. Among them, the electric control valve 203 is arranged on the self-suction pipe 202. When the electric control valve 203 is opened, the accumulated water can be discharged through the self-suction pipe 202. When the electric control valve 203 is closed, the accumulated water cannot pass through the self-suction pipe 202.

[0066] Based on the description of the above embodiments, the embodiment of the present invention can achieve the purpose of emptying the accumulated water in the water suction pit 5 by setting the negative pressure water suction component 2. However, there may be a problem of low drainage efficiency. Although the positive pressure water drainage component 3 has a high drainage efficiency, there is a problem that it cannot completely empty the accumulated water in the water suction pit 5. The embodiment of the present invention can control the negative pressure water suction component 2 and / or the positive pressure water drainage component 3 to drain water based on certain conditions by the main control component 104 under specific circumstances, so that the negative pressure water suction component 2 and the positive pressure water drainage component 3 each reach the best applicable working conditions.

[0067] Continue to refer to Figure 2 , in some embodiments, the tunnel drainage system further includes a liquid level gauge 101.

[0068] The liquid level gauge 101 is arranged in the water suction pit 5.

[0069] The liquid level gauge 101 is electrically connected to the main control component 104.

[0070] The main control component 104 is further used to control the negative pressure water suction component 2 and / or the positive pressure water drainage component 3 to drain water based on the accumulated water level measured by the liquid level gauge 101.

[0071] As Figure 2 shown, Figure 2 the signal cable 102 is also shown in the figure. The signal cable 102 can be used to electrically connect the liquid level gauge 101 to the main control component 104.

[0072] During the application of the tunnel structure, a certain degree of water seepage may occur inside the tunnel structure, and in some cases, water accumulation may also occur inside the tunnel structure based on fire protection requirements. The liquid level gauge 101 can accurately measure the water level in the sump 5. After that, the negative pressure water suction assembly 2 and / or the positive pressure drainage assembly 3 can be controlled to drain water based on the water level situation.

[0073] For example, the hydraulic water suction assembly can be controlled to drain water after the water level in the sump reaches the first water level, empty the accumulated water or drain the water level below a specific water level, so that the accumulated water cannot erode the roadbed and the railway tracks. If the water level in the sump still rises and reaches a higher second water level when the negative pressure water suction assembly 2 is already in operation, it means that the accumulation rate of the accumulated water is relatively fast, and the accumulated water cannot be emptied solely by the negative pressure water suction assembly 2. Then, the negative pressure water suction assembly 2 can be stopped from draining water, and the positive pressure drainage assembly 3 can be used to drain water to quickly empty the accumulated water.

[0074] In summary, based on the above solutions, the embodiments of the present invention can select the negative pressure water suction assembly 2 and / or the positive pressure drainage assembly 3 to drain water based on the liquid level situation of the sump 5, so as to achieve the purpose of quickly draining water or emptying the accumulated water.

[0075] The embodiments of the present invention also provide a control method for a tunnel drainage system based on a mechanical connection channel, which is applied to any tunnel drainage system based on a mechanical connection channel in the embodiments of the above-mentioned tunnel drainage system based on a mechanical connection channel. The control method includes:

[0076] Control the negative pressure water suction assembly and / or the positive pressure drainage assembly to drain the accumulated water in the sump.

[0077] The control method provided by the embodiments of the present invention is applied to the above-mentioned tunnel drainage system, and has the same technical features as the above-mentioned tunnel drainage system. Therefore, the same technical problems can be solved and the same technical effects can be achieved, which will not be elaborated here.

[0078] In some embodiments, controlling the negative pressure water suction assembly to drain the accumulated water in the sump includes:

[0079] Determine the water level of the accumulated water in the sump based on the liquid level gauge.

[0080] Determine that the water level of the accumulated water reaches the first water level, and control the negative pressure water suction assembly to drain the accumulated water in the sump.

[0081] Specifically, after it is determined through the liquid level gauge that the water level of the accumulated water reaches the first water level, it can represent that the current water level of the accumulated water is relatively high. If the water continues to accumulate, it may cause the accumulated water to erode the roadbed and the railway tracks. At this time, the negative pressure coefficient assembly can be controlled to operate for drainage.

[0082] In addition, a fifth liquid level can be set, which is lower than the first liquid level. When the accumulated water level does not reach the fifth liquid level, the negative pressure water suction assembly and the positive pressure water drainage assembly are both controlled to be in the standby state. When the accumulated water level reaches the fifth liquid level, the liquid level growth rate can be obtained based on the measured accumulated water level, and the management personnel can be alerted according to the set nodes and frequencies, and the negative pressure water suction assembly can be controlled to enter the quasi-operation state. When the accumulated water level reaches the first liquid level, the negative pressure water suction assembly is controlled to operate. Figure 2 For reference, the electric control valve 203 can be controlled to open, and the two self-priming pumps 201 can be controlled to operate together. The accumulated water enters the self-priming pipe 202, passes through the electric control valve 203 and the self-priming pumps 201, and then flows into the main drainage pipe 4 through the outlet pipe 302 of the self-priming pumps 201 until the accumulated water level drops below the first liquid level.

[0083] Based on the above solution, the embodiment of the present invention can accurately control the accumulated water level through the negative pressure water suction assembly, and prevent the accumulated water level from being too high to erode the roadbed and the railway track.

[0084] In some embodiments, at least two submersible pumps are arranged in each sump. After determining that the accumulated water level reaches the first liquid level and controlling the negative pressure water suction assembly to drain the accumulated water in the sump, it further includes:

[0085] Based on the accumulated water level reaching the second liquid level and the negative pressure water suction assembly being in the operating state, the negative pressure water suction assembly is controlled to stop operating, and a submersible pump is controlled to drain the accumulated water in the sump.

[0086] Wherein, the second liquid level is higher than the first liquid level.

[0087] Continue to refer to Figure 2 , in some cases, the water production rate in the tunnel structure may be too high, and the negative pressure water suction assembly 2 cannot drain all the generated accumulated water. Even if the negative pressure water suction assembly 2 is in the operating state and the accumulated water level continues to rise and reaches the second liquid level, it indicates that there may be abnormal large-flow water gathering in the tunnel. A submersible pump 301 can be controlled to operate for drainage, and the negative pressure water suction assembly 2 can be controlled to stop operating to quickly reduce the liquid level.

[0088] In some embodiments, after controlling the negative pressure water suction assembly to stop operating and controlling a submersible pump to drain the accumulated water in the sump, it further includes:

[0089] Based on the accumulated water level reaching the third liquid level and a submersible pump being in the operating state, at least two submersible pumps are controlled to drain the accumulated water in the sump.

[0090] Wherein, the third liquid level is higher than the second liquid level.

[0091] Continue to refer to Figure 2, in some cases, there is still a certain possibility that a single submersible pump 301 still cannot drain the accumulated water, and the water level of the accumulated water still rises. At this time, the number of submersible pumps 301 started can be increased. Figure 2 In Figure 2 , only two submersible pumps 301 are provided in a single sump 5 as an example, then the two submersible pumps 301 can be all started. Thereby, the drainage rate can be increased to avoid excessive accumulation of the accumulated water.

[0092] For a similar principle, if more submersible pumps can be provided in the sump, the number of submersible pumps started can be gradually increased on a similar principle until the water level of the accumulated water in the sump is in a decreasing state.

[0093] In some embodiments, after controlling at least two submersible pumps to drain the accumulated water in the sump, it further includes:

[0094] Based on the water level of the accumulated water reaching the fourth water level and all submersible pumps being in an operating state, controlling all submersible pumps and the negative pressure water suction assembly to drain the accumulated water in the sump;

[0095] Wherein, the fourth water level is higher than the third water level.

[0096] Continue to refer to Figure 2 , in some cases, the rate of generating the accumulated water may be too fast, resulting in the water level of the accumulated water still rising even if all submersible pumps 301 are started. At this time, all submersible pumps 301 and all self-priming pumps 201 in the negative pressure water suction assembly 2 can be started simultaneously, so as to achieve the maximum drainage rate, quickly drain the accumulated water as much as possible, and delay the rising rate of the water level of the accumulated water.

[0097] Further, taking the example that the water level of the accumulated water gradually decreases after starting two submersible pumps 301, when the water level of the accumulated water drops to the second water level, all submersible pumps 301 can be controlled to stop running, and instead, the self-priming pumps 201 in the negative pressure water suction assembly 2 can be controlled to run for drainage. When the water level of the accumulated water further drops to the first water level, the negative pressure water suction assembly 2 can be controlled to stop running.

[0098] For the calibration of the first water level, the second water level, the third water level, and the fourth water level, it can be carried out based on the conceptual logic of the embodiments of the present invention. Specifically, the first water level can be less than the horizontal height of the roadbed and the railway tracks, that is, when the accumulated water does not reach the first water level, the roadbed and the railway tracks cannot be eroded. The second water level can be flush with the highest water surface of the submersible pump body, thereby ensuring that when the submersible pump is started, the submersible pump can be fully immersed in the accumulated water.

[0099] Additionally, in order to prevent waterlogging and avoid erosion of the roadbed and track caused by the water level remaining between the first water level and the second water level, the minimum drainage water level height of the submersible pump can be made lower than the first water level. The setting idea is as follows: there is a specific situation where the accumulation rate of waterlogging is greater than the drainage rate of the negative pressure water absorption component but less than the drainage rate of the submersible pump. At this time, if the minimum drainage water level height of the submersible pump is higher than the first water level but lower than the second water level, the waterlogging level will always remain between the minimum drainage water level height of the submersible pump and the first water level, and the roadbed and railway tracks can still be eroded. However, this problem will not exist after adopting the above solution.

[0100] Regarding the third water level and the fourth water level, the embodiments of the present invention have not made special regulations for the time being. It is only necessary to make the third water level higher than the second water level and the fourth water level higher than the third water level.

[0101] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of the present invention.

Claims

1. A control method for a tunnel drainage system based on a mechanical communication channel, characterized in that: The invention is applied to a tunnel drainage system based on a mechanical communication channel, wherein the system is applied to a tunnel structure based on a mechanical communication channel, wherein the tunnel structure comprises an up tunnel, a down tunnel and a mechanical communication channel; The tunnel drainage system includes a water absorption pit, a negative pressure water absorption component and a positive pressure drainage component; The up tunnel and the down tunnel are connected via the mechanical communication channel, and the lowest level of the mechanical communication channel is higher than the lowest level of the up tunnel and the down tunnel; The water absorption pit is arranged at the lowest point of the upward tunnel and the downward tunnel, and the lowest level of the water absorption pit is lower than the lowest level of the upward tunnel and the downward tunnel; The negative pressure water absorption component comprises a self-suction pipe, the water absorption port of the self-suction pipe extends into the water absorption pit and is flush with the lowest horizontal surface of the water absorption pit; The positive pressure drainage assembly includes a submersible pump, and the submersible pump is arranged in the water suction pit; The tunnel drainage system also includes a main control component; The main control component is electrically connected to the negative pressure water absorption component and the positive pressure water drainage component; The main control assembly is fixed on the side wall of the mechanical communication channel; The main control component is used to control the drainage of the negative pressure water absorption component and / or the positive pressure drainage component; The tunnel drainage system also includes a liquid level meter; The liquid level meter is arranged in the water absorption pit; The liquid level meter is electrically connected to the main control component; The main control component is also used to control the drainage of the negative pressure water absorption component and / or the positive pressure drainage component based on the accumulated water level measured by the liquid level meter; The control method comprises: Control the negative pressure water absorption component and / or the positive pressure drainage component to discharge the accumulated water in the water absorption pit; Controlling the negative pressure water absorption component and / or the positive pressure drainage component to discharge the accumulated water in the water absorption pit comprises: Determining the accumulated water level of the water absorption pit based on a liquid level meter; Determining that the accumulated water level reaches a first liquid level, and controlling the negative pressure water absorption component to discharge the accumulated water in the water absorption pit; At least two submersible pumps are arranged in each water absorption pit; after determining that the accumulated water level reaches a first liquid level, the negative pressure water absorption assembly is controlled to discharge the accumulated water in the water absorption pit, the method further includes: Based on the accumulated water level reaching a second liquid level and the negative pressure water absorption component being in operation, controlling the negative pressure water absorption component to stop operating and controlling one of the submersible pumps to discharge the accumulated water in the water absorption pit; wherein the second liquid level is higher than the first liquid level; After controlling the negative pressure water absorption component to stop running and controlling one of the submersible pumps to discharge the accumulated water in the water absorption pit, the method further includes: Based on the accumulated water level reaching a third level and one of the submersible pumps being in operation, controlling at least two of the submersible pumps to discharge the accumulated water in the suction pit; Wherein, the third liquid level is higher than the second liquid level; After controlling at least two submersible pumps to discharge the accumulated water in the water suction pit, the method further comprises: Based on the accumulated water level reaching a fourth level and all the submersible pumps being in operation, controlling all the submersible pumps and the negative pressure water suction components to discharge the accumulated water in the water suction pit; Wherein, the fourth liquid level is higher than the third liquid level.

2. The tunnel drainage system according to claim 1, characterized in that: The tunnel drainage system also includes a drainage main pipe; the negative pressure water absorption component also includes a self-priming pump; the positive pressure drainage component also includes a water outlet pipe; The self-priming pump is connected between the self-priming pipe and the drainage main pipe; The water outlet pipe is connected between the submersible pump and the drainage main pipe.

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