Roadbed blind ditch easy to assemble

Abstract

The utility model relates to the field of road drainage, in particular to a roadbed blind ditch easy to assemble. The device comprises a base, a water seepage diversion assembly and a partition plate, the base is provided with an upward placing groove and a clamping groove, and the placing groove is an arc-shaped groove; the water seepage flow guide assemblies are connected in the length direction of the base, each water seepage flow guide assembly comprises a corrugated pipe, a water permeable layer and an outer frame which are sequentially connected from inside to outside, each corrugated pipe comprises an upper pipe part and a lower pipe part which are distributed up and down and detachably or integrally connected, and each upper pipe part and each lower pipe part are each of a semi-annular structure; a plurality of water permeable holes distributed in a fan shape are formed in the upper portion and the middle of the corrugated pipe, the lower pipe part is placed in the containing groove, positioning table parts erected on the base are arranged on the two sides of the lower pipe part in the horizontal direction, connecting plate parts connected with the positioning table parts are arranged on the two sides of the upper pipe part in the horizontal direction, and a plurality of water seepage holes are distributed in the outer frame. The arrangement direction of the corrugated pipes can be positioned, effective water seepage and drainage effects can be guaranteed, and the distribution directions of the water permeable holes in the corrugated pipes are uniform.

Description

Technical Field

[0001] This utility model relates to the field of road drainage, and in particular to an easy-to-assemble roadbed blind ditch. Background Technology

[0002] In high-speed railway construction, deep-buried drainage ditches need to be laid in the subgrade base to collect and divert groundwater, lower the groundwater level, and reduce the probability of subgrade deformation or uneven settlement caused by groundwater. Currently, high-speed railway projects generally use deep-buried reinforced concrete pipes or perforated double-wall corrugated pipes, with a filter layer or filtration layer used for backfilling in the upper part, to carry out subgrade base drainage.

[0003] Currently, roadbed drainage blind ditches are being used in high-speed railway roadbeds. These ditches consist of a base, outer frame, double-walled corrugated pipes, and a permeable layer. The outer frame is detachably installed on the upper part of the base, and the double-walled corrugated pipes are mounted on the base. The permeable holes on the double-walled corrugated pipes are distributed at the junction with the permeable layer; that is, the permeable holes are mainly distributed in the upper and middle parts of the double-walled corrugated pipes, while the lower part does not require permeable holes, thus ensuring the effective drainage of the double-walled corrugated pipes to distant locations.

[0004] However, in order to ensure the water seepage and drainage effect of the double-wall corrugated pipe, the part of the double-wall corrugated pipe without water perforation holes needs to be placed downwards. At present, there is a lack of technology to locate the installation position of the double-wall corrugated pipe, and when multiple double-wall corrugated pipes are connected, the distribution position of the water perforation holes on the multiple double-wall corrugated pipes cannot be unified. Utility Model Content

[0005] The purpose of this utility model is to address the problems existing in the background technology by proposing an easy-to-assemble roadbed blind ditch that can locate the placement of corrugated pipes, ensure effective water seepage and drainage, and make the distribution of permeable holes on multiple corrugated pipes uniform.

[0006] The technical solution of this utility model is an easily assembled roadbed blind ditch, including a base, a seepage diversion component, and a partition. The base has an upward-facing placement groove and a snap-fit ​​groove, and the placement groove is an arc-shaped groove. Multiple sets of seepage diversion components are connected along the length of the base, including a corrugated pipe, a permeable layer, and an outer frame connected sequentially from the inside to the outside. The corrugated pipe includes an upper pipe section and a lower pipe section that are distributed vertically and can be detached or integrally connected. Both the upper pipe section and the lower pipe section are semi-circular structures. The upper and middle parts of the corrugated pipe have multiple permeable holes distributed in a fan shape. The lower pipe section is placed in the placement groove. The lower pipe section has positioning platforms on both sides of the horizontal direction on the base. The upper pipe section has connecting plates on both sides of the horizontal direction that connect to the positioning platforms. Multiple seepage holes are distributed on the outer frame, and the bottom end of the outer frame is snapped into the snap-fit ​​groove. The partition is set between the corrugated pipe and the outer frame, and multiple partitions are distributed in a fan shape around the corrugated pipe.

[0007] Preferably, the plurality of permeable holes include a plurality of first permeable holes distributed on the upper sides of the lower pipe section and a plurality of second permeable holes evenly distributed on the outer periphery of the upper pipe section.

[0008] Preferably, the water-permeable holes are located at the troughs of the corrugated pipe, and the water-permeable holes are round.

[0009] Preferably, the positioning platform is located at the crest of the lower tube section, and the connecting plate is located at the crest of the upper tube section.

[0010] Preferably, the top of the positioning platform gradually slopes upward from the inside to the outside and has a threaded hole, the connecting plate gradually slopes upward from the inside to the outside and has a connecting hole corresponding to the threaded hole, and a bolt passing through the connecting hole is threadedly connected to the threaded hole.

[0011] Preferably, one end of the corrugated pipe is a spigot end, and the other end is a flared end adapted to the spigot end.

[0012] Preferably, the outer frame includes an arc-shaped upper frame with downward openings and two clips vertically connected to both ends of the upper frame. The multiple seepage holes include multiple second seepage holes evenly distributed on the upper frame and multiple first seepage holes evenly distributed on the clips.

[0013] Preferably, the bottom of the snap-fit ​​bracket has a snap-fit ​​buckle that snaps into the snap-fit ​​groove.

[0014] Preferably, the upper frame has a tapered plug-in plate at one end and a locking hole at the other end. The plug-in plate has a protruding buckle that matches the locking hole on its outer periphery, and the outer end of the plug-in plate has a chamfer and multiple notches distributed along an arc.

[0015] Preferably, a geotextile layer is attached to the outer periphery of the outer frame, and a protective grid layer is attached to the outer periphery of the geotextile layer. The bottom ends of both the geotextile layer and the protective grid layer are inserted into the snap-fit ​​groove.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention can position the corrugated pipe and place the two positioning platforms of the corrugated pipe on the top of the base, respectively located on both sides of the placement groove. At this time, the permeable holes are distributed in the upper and middle parts of the corrugated pipe, and the permeable holes on multiple corrugated pipes are uniformly distributed. Multiple corrugated pipes can more evenly carry out groundwater infiltration and drainage. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of Embodiment 1 of this utility model;

[0018] Figure 2 This is a schematic diagram of the bellows structure;

[0019] Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle;

[0020] Figure 4 This is an exploded view of the bellows structure;

[0021] Figure 5 This is a front structural sectional view of the outer frame in Embodiment 2 of this utility model;

[0022] Figure 6 This is a structural cross-sectional view of the upper frame.

[0023] Reference numerals: 1. Base; 11. Placement groove; 2. Corrugated pipe; 21. Lower pipe section; 211. First permeable hole; 212. Positioning platform section; 22. Upper pipe section; 221. Second permeable hole; 222. Connecting plate section; 3. Permeable layer; 4. Outer frame; 400. Snap-fit ​​buckle section; 41. Snap-fit ​​bracket; 411. First through hole; 412. First seepage hole; 42. Upper frame; 421. Second through hole; 422. Second seepage hole; 423. Insertion plate section; 4231. Protruding buckle section; 4232. Chamfer; 424. Snap hole; 425. Notch; 5. Geotextile layer; 6. Protective grid layer; 7. Partition plate. Detailed Implementation

[0024] Example 1

[0025] like Figures 1-4 As shown in the figure, the easily assembled roadbed blind ditch proposed in this embodiment includes a base 1, a water seepage diversion component and a partition 7.

[0026] The base 1 has an upward-facing placement groove 11 and a snap-fit ​​groove. The placement groove 11 is an arc-shaped groove, and the snap-fit ​​groove is a trapezoidal groove. The width of the groove opening is smaller than the width of the groove bottom.

[0027] Multiple sets of permeable drainage components are connected along the length of the base 1, with the specific number depending on the length of drainage required. The permeable drainage component includes a corrugated pipe 2, a permeable layer 3, and an outer frame 4 connected sequentially from the inside out. The permeable layer 3 is made of HDPE geomat and is embedded in the troughs of the corrugated pipe 2, providing good filtration. The permeable layer 3 meets the following technical standards: ① nominal strength not less than 15kN / m, ② unit mass not less than 200g / m³. 2 ③ The longitudinal and transverse tensile breaking strength is not less than 15kN / m; ④ The CBR puncture strength is not less than 2.3kN, and it meets the relevant requirements of "Railway Engineering Geosynthetics Part 5: Geotextiles" (Q / CR549.5-2016). The corrugated pipe 2 includes an upper pipe section 22 and a lower pipe section 21, which are distributed vertically and can be detached or integrally connected, and are made of rigid polyvinyl chloride (PVC-U). The density of the corrugated pipe is 1523kg / m³. 3 It meets the requirement of ≤1550kg / m 3The standard value negative deviation index; the corrugated pipe ring stiffness is 8.8kPa, which meets the standard value positive deviation index of ≥8kPa; the impact performance TIR of the corrugated pipe is ≤10%. Both the upper pipe section 22 and the lower pipe section 21 are semi-annular structures, which can form a circular channel on the inside after connection. The lower pipe section 21 is placed in the placement groove 11. Both sides of the lower pipe section 21 have positioning platforms 212 that are erected on the base 1 in the horizontal direction. After being erected on the base 1, the positioning platforms 212 are located outside the placement groove 11. Both sides of the upper pipe section 22 have connecting plates 222 that are connected to the positioning platforms 212 in the horizontal direction. Multiple seepage holes are distributed on the outer frame 4. The bottom end of the outer frame 4 is snapped into the snap-fit ​​groove to fasten the corrugated pipe 2 and the permeable layer 3 on the inside, which is convenient for assembly.

[0028] like Figure 2 and Figure 4 As shown, the upper and middle parts of the corrugated pipe 2 have a plurality of permeable holes distributed in a fan shape. The plurality of permeable holes include a plurality of first permeable holes 211 distributed on the upper sides of the lower pipe section 21 and a plurality of second permeable holes 221 evenly distributed on the outer periphery of the upper pipe section 22. The first permeable holes 211 and the second permeable holes 221 are used for the infiltration of groundwater. No permeable holes are provided in the lower part of the lower pipe section 21, which is used to divert the water that has infiltrated into the corrugated pipe 2 to a distant location.

[0029] like Figure 1 and Figure 2 As shown, the permeable hole is located at the trough of the corrugated pipe 2. The permeable hole is a round hole. Water that seeps in from the seepage hole of the outer frame 4 will enter the inner side of the corrugated pipe 2 through the permeable hole, resulting in good seepage effect.

[0030] The positioning platform 212 is located at the crest of the lower tube 21, and the connecting plate 222 is located at the crest of the upper tube 22, facilitating the docking of the upper tube 22 and the lower tube 21. The top of the positioning platform 212 gradually slopes upward from the inside to the outside and has a threaded hole. The connecting plate 222 also gradually slopes upward from the inside to the outside and has a connecting hole corresponding to the threaded hole. This allows the upper tube 22 to be placed on top of the lower tube 21 during the assembly of the bellows 2, preventing radial misalignment. A bolt, preferably a plastic or stainless steel bolt, is threaded through the connecting hole at the threaded hole, enabling a detachable connection between the upper tube 22 and the lower tube 21. When it is necessary to inspect or clean the bellows 2, the upper tube 22 can be removed to check the condition inside the lower tube 21 or clean any dirt that may be present inside the lower tube 21, ensuring proper drainage. A sealing gasket can be added between the end faces where the upper tube section 22 and the lower tube section 21 meet to improve the sealing performance at this point.

[0031] Another connection method for the upper pipe section 22 and the lower pipe section 21 is the integral connection, in which the entire corrugated pipe 2 is an integral structure with higher structural strength.

[0032] like Figure 2As shown, one end of the corrugated pipe 2 is a spigot end, and the other end is a flared end adapted to the spigot end. The two corrugated pipes 2 are connected by a socket joint. A rubber ring is added to the outer circumference of the spigot end of one corrugated pipe 2 and inserted into the inner side of the flared end of the other corrugated pipe 2 to achieve a sealed connection and prevent leakage at the joint.

[0033] like Figure 1 As shown, baffles 7 are installed between the corrugated pipe 2 and the outer frame 4, with multiple baffles arranged in a fan shape around the corrugated pipe 2. The baffles 7 are made of plastic and are connected to the inner wall of the outer frame 4 by hot-melt bonding. The width of the baffles 7 is less than the distance between the outer frame 4 and the crest of the upper pipe section 22, ensuring that it does not block the permeable holes at the troughs. The width is distributed radially along the corrugated pipe 2, and the length is parallel to the axial direction of the corrugated pipe 2. The baffles 7 divide the space between the corrugated pipe 2 and the outer frame 4 into multiple compartments, each of which is equipped with a permeable layer 3. By installing the baffles 7, the pressure resistance of the entire blind drain can be effectively improved.

[0034] This embodiment can position the corrugated pipe 2. When the corrugated pipe 2 is placed in the placement groove 11 of the base 1, the two positioning platforms 212 are placed on the top of the base 1, respectively, on both sides of the placement groove 11. At this time, the permeable holes are distributed in the upper and middle parts of the corrugated pipe 2, which can ensure effective water seepage. No permeable holes are provided in the lower part of the corrugated pipe 2 to ensure the drainage effect. This makes the permeable holes on multiple corrugated pipes 2 uniformly distributed, and multiple corrugated pipes 2 can more evenly seep and drain groundwater.

[0035] Example 2

[0036] This embodiment proposes an easily assembled roadbed blind drain. The differences between this embodiment and Embodiment 1 are as follows: Figure 5 and Figure 6 As shown, the outer frame 4 includes an arc-shaped upper frame 42 with downward-facing openings and two clamping brackets 41 vertically connected to both ends of the upper frame 42. The upper frame 42 has a semi-circular structure. Specifically, both the top of the clamping brackets 41 and the bottom of the upper frame 42 have outward-extending extension plates. First through holes 411 and second through holes 421 are respectively provided on the extension plates at both locations. Bolts and nuts are used to detachably connect the two through holes 411 and 421. When it is necessary to disassemble the blind drain to inspect or clean the corrugated pipe 2, the upper frame 42 can be removed directly without removing the entire outer frame 4. Multiple seepage holes include multiple second seepage holes 422 evenly distributed on the upper frame 42 and multiple first seepage holes 412 evenly distributed on the clamping brackets 41. Water seeps into the corrugated pipe 2 through the first seepage holes 412 and the second seepage holes 422, specifically through the lower pipe section 21 for drainage.

[0037] The bottom of the snap-fit ​​bracket 41 has a snap-fit ​​buckle 400 that snaps into the snap-fit ​​groove, and the snap-fit ​​buckle 400 has a trapezoidal cross-section. The entire outer frame 4 is made of PP material, and the snap-fit ​​buckle 400 can snap into the snap-fit ​​groove of the base 1.

[0038] One end of the upper frame 42 has a tapered plug-in plate portion 423, and the other end has a locking hole 424. The outer periphery of the plug-in plate portion 423 has a protruding buckle portion 4231 that matches the locking hole 424. When connecting two upper frames 42, the protruding buckle portion 4231 of one upper frame 42 is inserted into the inner side of the locking hole 424 of the other upper frame 42 to achieve a snap-fit ​​connection. The outer end of the plug-in plate portion 423 has a chamfer 4232 and multiple notches 425 distributed along an arc. The chamfer 4232 facilitates insertion guidance when connecting two upper frames 42. When the two upper frames 42 are snap-fit ​​connected, the plug-in plate portion 423 will more easily undergo elastic deformation due to the design of the notches 425. After the protruding buckle portion 4231 is locked in the locking hole 424, the plug-in plate portion 423 is then tensioned in the opposite direction.

[0039] In this embodiment, the outer frame 4 is designed as a split unit. When inspecting the corrugated pipe 2, only the upper frame 42 needs to be removed, without the entire pipe needing to be removed. Adjacent outer frames 4 are connected by snap-fit ​​through the upper frame 42, which facilitates disassembly and assembly.

[0040] In addition, the connection between the snap-fit ​​bracket 41 and the upper frame 42 in the outer frame 4 can also be achieved by using hot melt adhesive. This connection can result in an integrated outer frame 4, which can be assembled and disassembled as a whole at the snap-fit ​​slot of the base 1.

[0041] Example 3

[0042] This embodiment proposes an easily assembled roadbed blind drain. Compared to Embodiment 2, in this embodiment, as follows: Figure 1 and Figure 5 As shown, a geotextile layer 5 is attached to the outer periphery of the outer frame 4. The puncture strength (kN) of the geotextile CBR is 2.3kN, which meets the positive deviation index of the standard value ≥1.9kN, and the longitudinal and transverse tensile strength (kN / m) of the geotextile is 14kN / m, which meets the positive deviation index of the standard value ≥10kN / m. A protective grid layer 6 is attached to the outer periphery of the geotextile layer 5, and the bottom ends of both the geotextile layer 5 and the protective grid layer 6 are inserted into the snap-fit ​​groove. By adding the geotextile layer 5 and the protective grid layer 6, the protective effect can be improved while ensuring the water filtration function. After the snap-fit ​​part 400 is inserted into the snap-fit ​​groove of the base 1, the bottom ends of the geotextile layer 5 and the protective grid layer 6 are then snapped in sequence, improving the reliability and load-bearing capacity of the entire blind drain structure.

[0043] The vertical compressive strength of the blind drain is 125 kPa, and the water per unit length of soil cover is 120 L / h, which meet the positive deviation index of the standard value ≥120 kPa and the positive deviation index of the standard value ≥100 L / h, respectively. The vertical compressive strength and water per unit length of soil cover of the blind drain were tested according to GB / T18477.1-2007 "Rigid Polyvinyl Chloride (PVC-U) Structural Wall Piping Systems for Buried Drainage - Part 1: Double-Wall Corrugated Pipes", GB / T17639-2008 "Geosynthetics - Filament Spunbond Needle-Punched Nonwoven Geotextiles", Q / CR549.6-2017 "Geosynthetics for Railway Engineering - Part 6", and TB10106-2010 "Technical Specification for Foundation Treatment of Railway Engineering".

[0044] Three complete 2m-long roadbed blind drains, made using the same materials and processes, were used for vertical compressive strength testing. The testing employed a hydraulic static load test method. The principle was as follows: under constant-speed uniform loading, the measured force value and the deformation value of the drainage pipe's inner diameter determine the vertical compressive strength of the blind drain. The blind drain was placed horizontally in a test loading chamber, and a granular medium was passed through the chamber to uniformly load the upper part of the blind drain. When the drainage pipe deformed, a reaction force was generated. The vertical compressive strength was calculated using the force value at a 3% deformation in the inner diameter direction of the drainage pipe.

[0045] Three complete 1.2m long roadbed blind drains were fabricated using the same materials and processes for soil cover water flow testing. The soil cover water flow method was used for testing. The testing principle is as follows: a certain thickness of soil is covered on the surface of the blind drain specimen, and the water flow rate passing through the blind drain specimen per unit time is measured under a constant water head.

[0046] The installation process and requirements for the blind drains on this roadbed are as follows:

[0047] 1.1 Construction Process

[0048] Linear piping — trench excavation — mortar bedding layer slope finding — manhole construction (leaving gaps for blind drain access) — blind drain segment placement — blind drain connection — blind drain joint cement sealing — protective layer medium and coarse sand backfilling — frog rammer compaction — roadbed backfilling — backfill compaction.

[0049] 1.2 Process Requirements

[0050] 1.2.1 Linear Piping Calculation: Based on the design requirements of the roadbed blind drain and the site topography, the construction unit needs to lay out the lines, propose a linear piping table, determine the length, number of sections, bend angle and quantity, and slope of each blind drain section, and provide feedback to the prefabricated blind drain manufacturer to determine the supply list.

[0051] 1.2.2 Foundation Trench Excavation: Excavate the foundation trench according to the design dimensions and install the blind drain. For soft-bed foundation trenches, soil replacement is required to ensure the bearing capacity of the foundation soil, which should be no less than 2t / m².2 For areas with well-developed groundwater, drainage treatment of the foundation trench is required to ensure that the foundation trench is dry.

[0052] 1.2.3 Mortar cushion layer slope finding: The mortar grade of the cushion layer shall not be less than M25, the thickness shall not be less than 100mm, the width shall not be less than 600mm, the longitudinal slope shall not be less than 2%, and the slope finding shall be in accordance with the design requirements.

[0053] 1.2.4 Foundation Acceptance: After the foundation mortar construction is completed, the supervisor needs to be notified to conduct foundation acceptance. Acceptance items include: foundation bearing capacity, foundation trench cross-sectional dimensions, slope, and curvature.

[0054] 1.2.5 Blind drains should be installed in sections.

[0055] 1) When the depth of the foundation trench is less than 1.5 meters, each section of the prefabricated blind ditch should be placed on the foundation trench cushion layer by 2-4 people lifting and placing it. Hemp rope should be used for binding during lifting and placing, and steel wire rope should not be used for binding.

[0056] 2) When the depth of the foundation trench is greater than 1.5 meters, the prefabricated blind ditch is placed on the foundation trench bedding layer using a sliding method supported by planks (or scaffolding pipes). During sliding, hemp ropes are required to be tied to both ends of the blind ditch. Personnel should gradually loosen the ropes during the sliding process and the ditch should not be allowed to slide freely.

[0057] 3) The direction of the smaller end of the drain pipe is the direction of the water flow in the blind ditch.

[0058] 1.2.6 Blind Drain Connection: Insert the smaller diameter end of the drain pipe of one blind drain into the larger diameter end of the drain pipe of the adjacent blind drain.

[0059] 1.2.7 Curvature Bending: At the natural curvature bend of the railway subgrade, the prefabricated drainage blind ditch uses a socket gap or flexible rubber sleeve to bend instead of bending. The bending angle is 3°. After the bend, steel bars are wedged into the subgrade concrete for temporary fixation.

[0060] 1.2.8 Cement sealing of blind drain joints: After the joint connection is completed, use cement of the same grade as the bedding layer. When sealing, the mortar must not contaminate the outer protective grid layer of the blind drain. The sealing height is the same as the outer diameter of the blind drain.

[0061] 1.2.9 Connection with manhole: During the construction of the manhole, a hole with a diameter 20mm or more larger than the outer diameter of the blind drain pipe is reserved at the bottom of the manhole. During installation, the protruding part of the blind drain pipe is inserted into the hole.

[0062] 1.2.10 Lateral backfilling and positioning of blind drain: After the blind drain is connected, the gap on both sides of the blind drain shall be backfilled with cement mortar or crushed stone with a particle size not greater than 20mm as specified in the drawings. The backfilling height shall not be greater than the height of the blind drain base. After backfilling, it shall be compacted.

[0063] 1.2.11 Concealed Inspection: After the blind drain installation joints are sealed, a concealed inspection shall be conducted before backfilling. The inspection items include: blind drain curvature, joint connection, joint sealing, and connection between the blind drain and the inspection well. Backfilling and compaction of the protective layer are prohibited without a concealed inspection.

[0064] 1.2.12 Backfilling of blind drain protective layer: The blind drain protective layer shall be backfilled with medium-coarse sand with a thickness of not less than 300mm. Crushed stone shall not be used for backfilling. After backfilling, a vibratory rammer with an impact energy of not more than 900N·m shall be used for compaction.

[0065] 1.2.13 Subgrade backfilling: Backfill and compact in large quantities according to the subgrade design to meet the subgrade design requirements.

[0066] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. An easy-to-assemble roadbed blind drain, characterized in that, include: The base (1) has an upward-facing placement groove (11) and a snap-fit ​​groove, wherein the placement groove (11) is an arc-shaped groove; The permeable drainage component is connected in multiple sets along the length of the base (1), including a corrugated pipe (2), a permeable layer (3) and an outer frame (4) connected from the inside to the outside. The corrugated pipe (2) includes an upper pipe (22) and a lower pipe (21) that are distributed vertically and can be detached or integrally connected. Both the upper pipe (22) and the lower pipe (21) are semi-circular structures. The upper and middle parts of the corrugated pipe (2) have multiple permeable holes distributed in a fan shape. The lower pipe (21) is placed in the placement groove (11). The lower pipe (21) has a positioning platform (212) on both sides of the horizontal direction on the base (1). The upper pipe (22) has a connecting plate (222) on both sides of the horizontal direction that is connected to the positioning platform (212). The outer frame (4) has multiple permeable holes distributed on it. The bottom end of the outer frame (4) is snapped into the snap-fit ​​groove. A partition (7) is set between the corrugated pipe (2) and the outer frame (4), and multiple partitions are distributed in a fan shape around the corrugated pipe (2).

2. The easily assembled roadbed blind drain according to claim 1, characterized in that, The multiple water-permeable holes include multiple first water-permeable holes (211) distributed on the upper sides of the lower pipe section (21) and multiple second water-permeable holes (221) evenly distributed on the outer periphery of the upper pipe section (22).

3. The easily assembled roadbed blind drain according to claim 1, characterized in that, The permeable hole is located at the trough of the corrugated pipe (2), and the permeable hole is a round hole.

4. The easily assembled roadbed blind drain according to claim 1, characterized in that, The positioning platform (212) is located at the crest of the lower tube (21), and the connecting plate (222) is located at the crest of the upper tube (22).

5. The easily assembled roadbed blind drain according to claim 1, characterized in that, The top of the positioning platform (212) gradually slopes upward from the inside to the outside and has a threaded hole. The connecting plate (222) gradually slopes upward from the inside to the outside and has a connecting hole corresponding to the threaded hole. A bolt passing through the connecting hole is threadedly connected to the threaded hole.

6. The easily assembled roadbed blind drain according to claim 1, characterized in that, One end of the corrugated pipe (2) is a socket end, and the other end is a flared end that is adapted to the socket end.

7. The easily assembled roadbed blind drain according to claim 1, characterized in that, The outer frame (4) includes an upper frame (42) with an arc-shaped distribution and an opening facing downwards, and two clips (41) vertically connected to both ends of the upper frame (42). The multiple seepage holes include multiple second seepage holes (422) evenly distributed on the upper frame (42) and multiple first seepage holes (412) evenly distributed on the clips (41).

8. The easily assembled roadbed blind drain according to claim 7, characterized in that, The bottom of the snap-fit ​​bracket (41) has a snap-fit ​​buckle (400) that snaps into the snap-fit ​​groove.

9. The easily assembled roadbed blind drain according to claim 8, characterized in that, The upper frame (42) has a tapered plug plate portion (423) at one end and a locking hole (424) at the other end. The plug plate portion (423) has a protruding buckle portion (4231) that matches the locking hole (424) on its outer periphery. The plug plate portion (423) has a chamfer (4232) and multiple notches (425) distributed along the arc direction at its outer end.

10. The easily assembled roadbed blind drain according to claim 9, characterized in that, A geotextile layer (5) is attached to the outer periphery of the outer frame (4), and a protective grid layer (6) is attached to the outer periphery of the geotextile layer (5). The bottom ends of the geotextile layer (5) and the protective grid layer (6) are both inserted into the snap-fit ​​groove.

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