Railway roadbed drainage device, repair structure and mud overflow treatment method

Abstract

The invention discloses a railway roadbed drainage device, a repair structure and a mud-overflowing and mud-overflowing treatment method. The roadbed includes a track support layer and a base bed surface layer below the track support layer, and the track support layer is above the track. The device includes an anode tube, which is placed obliquely downward from one side of the track; a cathode tube, which is placed obliquely upward from the other side of the track; an electrode tube, which is located between the anode tube and the cathode tube and serves as the cathode of the anode tube and the anode of the cathode tube; the anode tube, the electrode tube and the cathode tube constitute an electrode group, and the electrode group is distributed at intervals along the track; the anode tube and the electrode tube constitute a first electrode pair, and the electrode tube and the cathode tube constitute a second electrode pair, and the relay and the power supply enable the first electrode pair and the second electrode pair to be alternately energized. The anode tube, the electrode tube and the cathode tube have a certain slope, which can accelerate the drainage of water. The first electrode pair and the second electrode pair are alternately energized, which can make the soil water migration and drainage more uniform.

Description

Technical Field

[0001] The invention relates to the technical field of railway roadbed drainage and regulation, and in particular to a railway roadbed drainage device, a repair structure and a mud bubbling regulation method. Background Art

[0002] Since railway subgrade is easily affected by rainfall and groundwater, once surface water or groundwater infiltrates into a specific foundation soil, the pore water pressure will change continuously under the action of load, resulting in overall softening phenomena such as mud bubbling and ballast sinking, which seriously affects the stability and safety of train operation. Mud bubbling of subgrade is the result of the combined effect of multiple factors. Soil quality, water, temperature, road surface and vehicle load are the main factors affecting mud bubbling of subgrade, and there are also reasons related to engineering measures.

[0003] Although extensive research has been conducted at home and abroad on the treatment technology of mud bubbling on the roadbed, many traditional technologies have been formed, such as the grouting method, which uses a grouting machine to inject organic materials into the empty area between the base plate and the surface of the subgrade, so that it fills between the base plate and the surface of the subgrade, compacts the soil, and improves the integrity of the roadbed. However, organic materials are very easy to age. For the rainy southeast region, the re-infiltration of rainwater will affect the service life of the grouting material, resulting in a weakening of the curing effect. The second method is the drainage method. This method is suitable for subgrade diseases caused by poor drainage. It removes groundwater or lowers the groundwater level by dredging or building drainage facilities such as drainage ditches, thereby reducing the erosion of the subgrade by surface water and groundwater. However, this method is complex in design, requires a large amount of construction, and requires closed lines during construction, which has a greater impact on driving. In addition, in general, while draining water, mud will also be drained away, causing the loss of subgrade soil particles.

[0004] Among the traditional renovation technologies, some have good effects, while others are not satisfactory. The biggest drawback is that most of the lines need to be closed during construction, which seriously affects the normal operation and safety of the lines. At the same time, due to operational needs, the railway skylight points are getting shorter and shorter, and traditional renovation technologies cannot be completed in a short time. The construction time is too short, which affects the renovation quality. Summary of the invention

[0005] The first technical problem to be solved by the present invention is to improve the remediation effect without affecting railway operations.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a railway roadbed drainage device, a repair structure and a mud bubbling and mud treatment method.

[0007] The technical solutions adopted are as follows:

[0008] A railway roadbed drainage device, wherein the roadbed comprises a track support layer and a base bed surface layer below the track support layer, and the track is located above the track support layer.

[0009] An anode tube, the anode tube is placed obliquely downward from one side of the track, the output end of the anode tube is located in the surface layer of the base bed and the output end faces the track axis;

[0010] A cathode tube, the cathode tube is placed obliquely upward from the other side of the track, the output end of the cathode tube is located in the surface layer of the base bed and the output end faces the axis of the track, and the cathode tube is connected to the drainage pipe;

[0011] An electrode tube, the electrode tube is located between the anode tube and the cathode tube and serves as both the cathode of the anode tube and the anode of the cathode tube, the output end of the electrode tube is located in the surface layer of the base bed and faces the cathode tube;

[0012] Relays and power supplies;

[0013] The anode tube, the electrode tube and the cathode tube constitute an electrode group, and the electrode group is distributed at intervals along the track;

[0014] In each electrode group, the anode tube and the electrode tube constitute a first electrode pair, and the electrode tube and the cathode tube constitute a second electrode pair. The relay and the power supply enable the first electrode pair and the second electrode pair to be energized alternately.

[0015] First, the anode tube, the electrode tube and the cathode tube have a certain slope, which can accelerate the drainage of water. Secondly, by alternately energizing the first electrode pair and the second electrode pair, the soil water migration and drainage can be more uniform. Furthermore, by setting the first electrode pair and the second electrode pair, the electrode spacing can be shortened, the drainage can be accelerated, and the cost and processing time can be reduced. The drainage principle is: when direct current is passed to the first electrode pair or the second electrode pair, the positively charged pore water is concentrated in the direction of the cathode tube and finally discharged from the drainage pipe.

[0016] Furthermore, the angle between the anode tube and the horizontal plane is 10° to 20°; the drainage slope of the cathode tube is 2% to 4%; the angle between the electrode tube and the horizontal plane is 40° to 50°; the spacing between adjacent electrode groups is 0.4 to 0.8m; and the output ends of the anode tube, electrode tube and cathode tube are located at a depth of 35 cm to 45 cm in the surface layer of the base bed. Thus, the best comprehensive drainage effect can be achieved.

[0017] Furthermore, at least one of the anode tube and the electrode tube is provided with a through hole on the tube body facing the cathode tube, thereby making it possible to distribute the cementing material introduced through the through hole more evenly in the surface layer of the base bed. The cathode tube body is provided with circumferentially distributed through holes, thereby facilitating the discharge of water. A filter layer is provided outside the cathode tube, thereby preventing the cathode tube from being blocked and affecting drainage.

[0018] Railway roadbed repair structures, including

[0019] A first grouting hole, wherein the first grouting hole is formed after the anode tube is pulled out;

[0020] A drainage channel, the drainage channel is composed of the cathode tube and the drainage pipe;

[0021] A second grouting hole, wherein the second grouting hole is formed after the electrode tube is pulled out;

[0022] A bonding layer, wherein the bonding layer is formed by bonding the second slurry injected through at least the anode tube of the anode tube and the electrode tube with the surface soil of the base bed;

[0023] The first grouting hole and the second grouting hole are filled with the first slurry.

[0024] Therefore, the railway roadbed repair structure utilizes the anode tube and the electrode tube of the above-mentioned railway roadbed drainage device to inject the second slurry to cement the surface soil of the base surface, which can achieve better reinforcement effect in the main stress-bearing area directly below the rail; injecting the first slurry into the first grouting hole and the second grouting hole can prevent rainwater from seeping in.

[0025] Furthermore, it also includes a grouting pipe, a sealing layer formed by curing the first slurry injected through the grouting pipe and located between the track support layer and the subgrade surface layer, and the first slurry filled in the grouting pipe. Thus, the sealing layer can prevent rainwater from penetrating into the subgrade surface layer and muddy water in the subgrade surface layer from overflowing upward to form mud overflowing disease.

[0026] The method for treating the mud bubbling of railway roadbed comprises the following steps:

[0027] (1) Install the above-mentioned railway subgrade drainage device at the railway subgrade mud and mud disease points;

[0028] (2) alternately energizing the first electrode pair and the second electrode pair until the drainage rate of the drainage pipe and / or the moisture content of the surface layer of the subgrade reaches a preset value; during which a second slurry capable of bonding with the surface soil of the subgrade to form a bonding layer is injected through the anode tube;

[0029] (3) After the anode tube and the electrode tube are pulled out, a first grouting hole and a second grouting hole are formed respectively, and then the first slurry is used to fill the first grouting hole and the second grouting hole.

[0030] It can be seen that this railway roadbed mud and slurry treatment method does not need to close the line when the power is turned on for drainage and reinforcement, and the train can run normally. The construction quality can be guaranteed within a shorter window time, avoiding the impact of closed construction on train operation and the phenomenon of poor construction quality caused by short window time.

[0031] Furthermore, in step (2), the power is turned on intermittently, and the intermittent power is preferably turned off for 5 to 15 minutes after every 2 to 4 hours of power on; thereby, the electric energy consumed to heat the soil can be reduced. And / or, in step (2), the ratio of the duration of alternating power on of the first electrode pair and the second electrode pair is 1:(1.5 to 2.5); the second electrode pair needs to drain the water migrated from the first electrode pair, so setting a longer power on duration can accelerate drainage.

[0032] Furthermore, the second slurry includes a first binder injected within 6-8 days of power-on and a second binder injected 8-10 days after power-on, and the first binder and the second binder bind the soil on the surface of the subgrade through chemical reaction; preferably, the first binder is a calcium chloride solution, and the second binder is a sodium silicate solution. Consolidating and chemically bonding the soft structural soil on the surface of the subgrade through chemical reaction can significantly improve the bearing capacity of the soil on the surface of the subgrade and reduce the possibility of mud bubbling.

[0033] Furthermore, the anode tube and the electrode tube are installed by drilling, and the cathode tube is installed by trenching and backfilling, thereby facilitating the rapid installation of the drainage device.

[0034] Since the drainage time usually takes at least 10 days, and no personnel supervision is required most of the time except for grouting, the second technical problem to be solved by the present invention is to make the above-mentioned railway roadbed drainage device, repair structure and mud and mud remediation method more convenient to use, save manpower and further improve the remediation effect.

[0035] In order to achieve the above-mentioned purpose, the present invention provides a railway roadbed drainage and monitoring device. The technical solution adopted is as follows:

[0036] Railway roadbed drainage and monitoring equipment, the roadbed includes a track support layer and a base bed surface layer below the track support layer, and the track is above the track support layer. The device includes

[0037] A drainage device, wherein the drainage device is an electroosmotic drainage device;

[0038] A detection device, the detection device comprising a soil moisture content sensor disposed in the surface layer of the base bed;

[0039] The control device comprises a controller, wherein the controller receives the detection data of the detection device and outputs the result to a display.

[0040] Therefore, through the railway roadbed drainage and monitoring equipment, even if the staff is not at the remediation site, they can understand the drainage progress and drainage effect in real time. When a drainage failure occurs, they can remotely shut down the drainage device and rush to the site in time.

[0041] Furthermore, the detection device comprises at least one row of soil moisture content sensors, and the at least one row of soil moisture content sensors are distributed at intervals along the track, thereby effectively detecting the entire muddy and bubbling road section.

[0042] Furthermore, the at least one row of soil moisture sensors is arranged on one side of the track where the cathode tube of the drainage device is located. Therefore, when the test result of the soil moisture sensor arranged at the above position reaches a preset value, it can be effectively indicated that the drainage is completed.

[0043] Furthermore, the soil moisture content sensor is connected to the output end of the cathode tube, so that the soil moisture content sensor can be installed by trenching and backfilling at the same time as the cathode tube, simplifying the installation process.

[0044] Furthermore, the display includes a fixed display and / or a mobile display, thereby facilitating real-time acquisition of detection data of the detection device.

[0045] Furthermore, the drainage device comprises

[0046] An anode tube, the anode tube is placed obliquely downward from one side of the track, the output end of the anode tube is located in the surface layer of the base bed and the output end faces the track axis;

[0047] A cathode tube, the cathode tube is placed obliquely upward from the other side of the track, the output end of the cathode tube is located in the surface layer of the base bed and the output end faces the axis of the track, and the cathode tube is connected to the drainage pipe;

[0048] An electrode tube, the electrode tube is located between the anode tube and the cathode tube and serves as both the cathode of the anode tube and the anode of the cathode tube, the output end of the electrode tube is located in the surface layer of the base bed and faces the cathode tube;

[0049] Relays and power supplies;

[0050] The anode tube, the electrode tube and the cathode tube constitute an electrode group, and the electrode group is distributed at intervals along the track;

[0051] In each electrode group, the anode tube and the electrode tube constitute a first electrode pair, and the electrode tube and the cathode tube constitute a second electrode pair. The relay and the power supply enable the first electrode pair and the second electrode pair to be energized alternately.

[0052] Furthermore, it also includes a cabinet, on which a heat dissipation component and wiring holes are provided.

[0053] Furthermore, the cabinet body is provided with rollers and / or pull rings; and the cabinet body is provided with an insulating coating.

[0054] Furthermore, the heat dissipation component includes a heat dissipation fan and a heat dissipation port; the opening of the heat dissipation port faces downward; a rainproof sheet is provided outside the heat dissipation fan; and a rainproof canopy is provided on the cabinet.

[0055] Furthermore, the detection device further comprises a water flow sensor arranged on the drainage pipe of the drainage device. Thus, the soil moisture content sensor and the water flow sensor work together to ensure the drainage effect.

[0056] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. Additional aspects and advantages of the present invention will be partially given in the following description, partially become apparent from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] The drawings constituting a part of the present invention are used to assist in understanding the present invention. The contents provided in the drawings and their related descriptions in the present invention can be used to explain the present invention, but do not constitute improper limitations on the present invention. In the drawings:

[0058] Figure 1 This is a schematic diagram of the railway subgrade drainage and monitoring equipment in Example 1 of the present invention.

[0059] Figure 2 It is a cross-sectional view of the drainage device of the railway roadbed drainage and monitoring equipment and the railway roadbed repair structure in Example 1 of the present invention.

[0060] Figure 3 It is a top view of the drainage device of the railway roadbed drainage and monitoring equipment in Example 1 of the present invention.

[0061] Figure 4 It is a cross-sectional view of the drainage device of the railway roadbed drainage and monitoring equipment and the railway roadbed repair structure in Example 3 of the present invention.

[0062] Figure 5 It is a top view of the drainage device of the railway roadbed drainage and monitoring equipment in Example 3 of the present invention.

[0063] The relevant marks in the above drawings are:

[0064] 100-track support layer, 110-base surface layer, 120-rail, 130-sleeper, 210-anode tube, 220-cathode tube, 230-electrode tube, 240-drainage pipe, 300-electrode group, 310-first electrode pair, 320-second electrode pair, 410-first grouting hole, 420-drainage channel, 430-second grouting hole, 440-bonding layer, 510-grouting pipe, 520-sealing layer, 600-cabinet, 610-relay, 620-power supply, 630-fixed display, 640-rainproof shed, 650-rainproof sheet, 660-inspection door, 670-heat dissipation vent, 680-soil moisture content sensor; DETAILED DESCRIPTION

[0065] The present invention is described clearly and completely below in conjunction with the accompanying drawings. A person skilled in the art will be able to implement the present invention based on these descriptions. Before describing the present invention in conjunction with the accompanying drawings, it should be particularly noted that:

[0066] The technical solutions and technical features provided in each part of the present invention, including the following description, may be combined with each other if there is no conflict.

[0067] In addition, the embodiments of the present invention involved in the following description are generally only a part of the embodiments of the present invention, rather than all the embodiments. Therefore, based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0068] About the terms and units in the present invention: The terms "include", "have" and any variations thereof in the description and claims of the present invention and related parts are intended to cover non-exclusive inclusions.

[0069] The railway subgrade described in the following embodiments includes a track support layer 100 and a bed surface layer 110 below the track support layer 100. The track is located above the track support layer 100. The thickness of the bed surface layer 110 is 60 cm. The track includes a rail 120 and a sleeper 130. The spacing between adjacent sleepers 130 is 0.6 m.

[0070] The track can be either a ballastless track or a ballasted track. When the track is a ballastless track, the track support layer 100 can be called a base plate. When the track is a ballasted track, the track support layer 100 can be called a ballast layer.

[0071] Example 1

[0072] like Figure 1 The railway roadbed drainage and monitoring equipment shown includes a drainage device, a detection device, a control device and a cabinet 600.

[0073] The detection device includes soil moisture content sensors 680 arranged in the base bed surface layer 110; the soil moisture content sensors 680 are arranged in a row and distributed along the track at a spacing of 1.2 m.

[0074] The control device includes a controller, which receives the detection data of the detection device and outputs the result to a display, and the display includes a fixed display 630 and a mobile display.

[0075] The cabinet 600 is provided with heat dissipation components, wiring holes, rollers, a rainproof canopy 640, and an insulating coating. The wiring hole is provided at the lower right side of the cabinet 600. The fixed display 630 is provided at the front side of the cabinet 600. The heat dissipation components include heat dissipation fans provided at the upper left and right sides of the cabinet 600 and a heat dissipation port 670 provided at the lower left side. The opening of the heat dissipation port 670 faces downward, and a rainproof sheet 650 is provided outside the heat dissipation fan. The rear side of the cabinet 600 is an inspection door 660.

[0076] like Figure 2-3 As shown, the drainage device is an electroosmotic drainage device, including an anode tube 210, a cathode tube 220, an electrode tube 230, a relay 610 and a power supply 620, wherein a controller controls the operation of the relay 610 and the power supply 620, and the relay 610 and the power supply 620 are arranged on the front side of the cabinet 600.

[0077] The anode tube 210 is placed obliquely downward from one side of the track, and the output end of the anode tube 210 is located in the base bed surface layer 110 and the output end faces the track axis; the angle between the anode tube 210 and the horizontal plane is 15°. At least the anode tube 210 facing the cathode tube 220 of the anode tube 210 and the electrode tube 230 is provided with a through hole.

[0078] The cathode tube 220 is placed obliquely upward from the other side of the track, the output end of the cathode tube 220 is located in the base bed surface layer 110 and the output end faces the track axis, and the cathode tube 220 is connected to the drainage pipe 240; the drainage slope of the cathode tube 220 is 3%. The cathode tube 220 is provided with circumferentially distributed through holes and a filter layer is provided on the outside.

[0079] The electrode tube 230 is located between the anode tube 210 and the cathode tube 220 and serves as both the cathode of the anode tube 210 and the anode of the cathode tube 220. The output end of the electrode tube 230 is located in the bed surface layer 110 and faces the cathode tube 220. The angle between the electrode tube 230 and the horizontal plane is 45°.

[0080] The anode tube 210 , the electrode tube 230 , and the cathode tube 220 constitute an electrode group 300 , and the electrode group 300 is distributed along the track at intervals of 0.6 m.

[0081] In each electrode group 300 , the anode tube 210 and the electrode tube 230 constitute a first electrode pair 310 , and the electrode tube 230 and the cathode tube 220 constitute a second electrode pair 320 . The relay 610 and the power supply 620 enable the first electrode pair 310 and the second electrode pair 320 to be energized alternately.

[0082] The distance between the input end of the anode tube 210 and the input end of the electrode tube 230 is 1.82 m; the distance between the input end of the electrode tube 230 and the output end of the cathode tube 220 is 1.85 m.

[0083] The soil moisture sensor 680 is disposed on one side of the track where the cathode tube 220 is located and is connected to the output end of the cathode tube 220. The output ends of the anode tube 210, the electrode tube 230 and the cathode tube 220 and the soil moisture sensor 680 are located at a depth of 40 cm in the bed surface layer 110.

[0084] The method for treating the mud bubbling of railway roadbed comprises the following steps:

[0085] (1) Installing the above-mentioned drainage device at the muddy and bubbling point of the railway roadbed, wherein the anode tube 210 and the electrode tube 230 are installed by drilling, and the cathode tube 220 and the soil moisture content sensor 680 are installed by trenching and backfilling;

[0086] (2) alternately energizing the first electrode pair 310 and the second electrode pair 320 until the drainage rate of the drainage pipe 240 and / or the moisture content of the subgrade surface layer 110 reaches a preset value; during this period, a second slurry capable of bonding with the soil of the subgrade surface layer 110 to form a bonding layer 440 is injected through the anode tube 210;

[0087] (3) After the anode tube 210 and the electrode tube 230 are pulled out, a first grouting hole 410 and a second grouting hole 430 are formed respectively, and then the first slurry is used to fill the first grouting hole 410 and the second grouting hole 430.

[0088] In step (2), the power is supplied intermittently, and the intermittent power supply is preferably powered off for 10 minutes after every 3 hours of power supply;

[0089] In step (2), the ratio of the duration of alternating power-on of the first electrode pair 310 and the second electrode pair 320 is 1:2. Specifically, when the intermittent power-on time of the first electrode pair 310 reaches 24 hours, the power-on is stopped, and then the second electrode pair 320 is intermittently powered for 48 hours, and the power-on is alternately performed with this power-on duration ratio.

[0090] In step (2), the second slurry includes a first binder injected on the third day after power-on and a second binder injected on the tenth day after power-on, and the first binder and the second binder bind the soil of the base surface layer 110 through chemical reaction; the first binder is a calcium chloride solution with a mass fraction of 26%, and the second binder is a sodium silicate solution with a mass fraction of 20%.

[0091] The railway roadbed repair structure formed by the above method and equipment includes a first grouting hole 410, a drainage channel 420, a second grouting hole 430 and a bonding layer 440. The first grouting hole 410 is formed after the anode tube 210 is pulled out, and the drainage channel 420 is composed of the cathode tube 220 and the drainage pipe 240. The second grouting hole 430 is formed after the electrode tube 230 is pulled out, and the bonding layer 440 is formed by bonding the second slurry injected through the anode tube 210 and at least the anode tube 210 of the electrode tube 230 with the soil of the base bed surface layer 110; the first grouting hole 410 and the second grouting hole 430 are filled with the first slurry.

[0092] Example 2

[0093] Compared with the first embodiment, the railway roadbed drainage and monitoring equipment of the present embodiment is different in that it also includes a water flow sensor arranged on the drainage pipe 240 .

[0094] Example 3

[0095] Compared with Example 1, the railway roadbed mud bubbling treatment method and railway roadbed repair structure of this embodiment are different in that they also include step (4): installing a grouting pipe 510, the output end of which is located between the track support layer 100 and the subgrade surface layer 110, and then injecting the first slurry through the grouting pipe 510. Figure 4-5 As shown, the railway roadbed repair structure thus obtained also includes a grouting pipe 510, a closed layer 520 formed by curing the first slurry injected through the grouting pipe 510 and located between the track support layer 100 and the subgrade surface layer 110, and the first slurry filled in the grouting pipe 510. The thickness of the closed layer 520 is 10 cm.

[0096] The grouting pipes 510 are arranged in two rows and are respectively located outside the two rails 120 , and each row of grouting pipes 510 is arranged at intervals of 1.2 m.

[0097] The first slurry in the above embodiment is an ultra-fine cement-based grouting material with a water-cement ratio of 0.4 and is mixed with 8‰ basalt fibers with a fiber length of 6 mm.

[0098] In the above embodiment, the anode tube 210, the cathode tube 220, and the electrode tube 230 are all made of galvanized steel tubes.

[0099] The above is a description of the relevant contents of the present invention. A person skilled in the art will be able to implement the present invention based on these descriptions. Based on the above contents of the present invention, all other embodiments obtained by a person skilled in the art without creative work shall fall within the scope of protection of the present invention.

Claims

1. A railway roadbed drainage device, wherein the roadbed comprises a track support layer (100) and a base bed surface layer (110) below the track support layer (100), and a track is located above the track support layer (100), characterized in that: The device includes an anode tube (210), the anode tube (210) being placed obliquely downward from one side of the track, the output end of the anode tube (210) being located in the surface layer (110) of the base bed and the output end facing the track axis; a cathode tube (220), the cathode tube (220) being placed obliquely upward from the other side of the track, the output end of the cathode tube (220) being located in the surface layer (110) of the base bed and facing the axis of the track, and the cathode tube (220) being connected to a drainage pipe (240); an electrode tube (230), the electrode tube (230) being located between the anode tube (210) and the cathode tube (220) and serving as both the cathode of the anode tube (210) and the anode of the cathode tube (220), the output end of the electrode tube (230) being located within the surface layer (110) of the base bed and facing the cathode tube (220); Relay (610) and power supply (620); The anode tube (210), the electrode tube (230) and the cathode tube (220) form an electrode group (300), and the electrode group (300) is distributed at intervals along the track; In each electrode group (300), the anode tube (210) and the electrode tube (230) constitute a first electrode pair (310), and the electrode tube (230) and the cathode tube (220) constitute a second electrode pair (320), and the relay (610) and the power supply (620) enable the first electrode pair (310) and the second electrode pair (320) to be energized alternately; The spacing between adjacent electrode groups (300) is 0.4-0.8 m; and at least one of the anode tube (210) and the electrode tube (230) is provided with a through hole on the tube body facing the cathode tube (220).

2. The railway roadbed drainage device according to claim 1, characterized in that: The angle between the anode tube (210) and the horizontal plane is 10° to 20°; the drainage slope of the cathode tube (220) is 2% to 4%; the angle between the electrode tube (230) and the horizontal plane is 40° to 50°; and the output ends of the anode tube (210), the electrode tube (230) and the cathode tube (220) are located at a depth of 35 cm to 45 cm in the surface layer (110) of the base bed.

3. The railway roadbed drainage device according to claim 1, characterized in that: The cathode tube (220) is provided with circumferentially distributed through holes on its body; and a filter layer is provided outside the cathode tube (220).

4. Railway roadbed repair structure, characterized by: include A first grouting hole (410), wherein the first grouting hole (410) is formed by pulling out the anode tube (210) of the railway roadbed drainage device according to any one of claims 1 to 3; A drainage channel (420), wherein the drainage channel (420) is composed of the cathode tube (220) and the drainage pipe (240) of the railway roadbed drainage device according to any one of claims 1 to 3; A second grouting hole (430), wherein the second grouting hole (430) is formed by pulling out the electrode pipe (230) of the railway roadbed drainage device according to any one of claims 1 to 3; A bonding layer (440), wherein the bonding layer (440) is formed by bonding a second slurry injected through at least the anode tube (210) of the anode tube (210) and the electrode tube (230) with soil of a surface layer (110) of a base bed; The first grouting hole (410) and the second grouting hole (430) are filled with a first slurry.

5. The railway roadbed repair structure according to claim 4, characterized in that: It also includes a grouting pipe (510), a closed layer (520) formed by solidifying the first slurry injected through the grouting pipe (510) and located between the track support layer (100) and the base bed surface layer (110), and the first slurry filled in the grouting pipe (510).

6. The method for treating mud bubbling on railway roadbed includes the following steps: (1) Installing the railway subgrade drainage device according to any one of claims 1 to 3 at the railway subgrade mud and mud disease point; (2) alternately energizing the first electrode pair (310) and the second electrode pair (320) until the drainage rate of the drainage pipe (240) and / or the moisture content of the subgrade surface layer (110) reaches a preset value; during this period, a second slurry capable of bonding with the soil of the subgrade surface layer (110) to form a bonding layer (440) is injected through the anode tube (210); (3) After the anode tube (210) and the electrode tube (230) are pulled out, a first grouting hole (410) and a second grouting hole (430) are formed respectively, and then the first slurry is used to fill the first grouting hole (410) and the second grouting hole (430).

7. The method for treating mud bubbling on railway roadbed according to claim 6, characterized in that: In step (2), intermittent power-on is adopted; and / or, in step (2), the ratio of the duration of alternating power-on of the first electrode pair (310) and the second electrode pair (320) is 1:(1.5-2.5).

8. The method for treating mud bubbling on railway subgrade according to claim 7, characterized in that: The intermittent power supply is to cut off the power for 5 to 15 minutes after each 2 to 4 hours of power supply.

9. The method for treating mud bubbling on railway subgrade according to claim 6, characterized in that: The second slurry includes a first binder injected within 6-8 days after power-on and a second binder injected 8-10 days after power-on, and the first binder and the second binder bind the soil of the surface layer (110) of the base bed through chemical reaction.

10. The method for treating mud bubbling on railway roadbed according to claim 9, characterized in that: The first binder is a calcium chloride solution, and the second binder is a sodium silicate solution.

11. The method for treating mud bubbling on railway roadbed according to claim 6, characterized in that: The anode tube (210) and the electrode tube (230) are installed by drilling; and the cathode tube (220) is installed by trenching and backfilling.

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