An arched drain blind pipe

Abstract

An arch-shaped blind drain pipe relates to the technical field of underground drainage engineering, which comprises a fixed plate, characterized in that an arch-shaped plate is installed on the fixed plate, a partition plate is arranged between the fixed plate and the arch-shaped plate, the partition plate separates the arch-shaped plate into an upper arch-shaped subplate and a lower arch-shaped subplate, and a plurality of water-permeable holes are arranged on the upper arch-shaped subplate and the partition plate. The utility model discloses a combined structure design of the arch-shaped plate and the partition plate, which can realize the shunt drainage of the upper and lower chambers, disperse external pressure by utilizing the arch-shaped structure, avoid damage caused by stress concentration, and has the advantages of relieving stress concentration, improving drainage efficiency and compression resistance.

Description

Technical Field

[0001] This utility model relates to the field of underground drainage engineering technology, and more specifically, to an arched drainage blind pipe. Background Technology

[0002] In various infrastructure construction projects, the reliability of drainage systems directly affects project safety. From roadbed drainage in transportation engineering, underground pipe networks in municipal engineering, seepage prevention and drainage of airport runways, waterproofing of building basements, to surface drainage in landscaping, comprehensive drainage facilities are essential. Underground projects, such as retaining walls and tunnels, which are subjected to long-term water and soil pressure, require even higher standards for the stability and efficiency of their drainage structures.

[0003] Chinese patent CN216339928U discloses a novel permeable pipe with a trapezoidal structure.

[0004] While existing trapezoidal permeable pipes improve compressive strength through diaphragm design, their angular structure is prone to stress concentration under external forces such as soil displacement or earthquakes, leading to structural damage. Furthermore, the uneven flow resistance caused by the varying trapezoidal cross-section affects drainage efficiency, potentially causing drainage problems during heavy rains or sudden rises in groundwater levels. Therefore, existing technologies urgently need improvement to address these issues. Utility Model Content

[0005] The purpose of this utility model is to solve the problems mentioned in the background art, and then to propose an arched drainage blind pipe.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] An arched drainage blind pipe includes a fixed plate, on which an arched plate is mounted. A partition plate is provided between the fixed plate and the arched plate, dividing the arched plate into an upper arched sub-plate and a lower arched sub-plate. The upper arched sub-plate and the partition plate are provided with a plurality of water-permeable holes.

[0008] Furthermore, the fixed plate and the arched plate form a drainage channel, and the middle partition plate divides the drainage channel into an upper water inlet chamber and a lower drainage chamber.

[0009] Furthermore, the fixed plate is provided with a first plug-in seat on the side near the arched plate, and the arched plate is provided with a second plug-in seat on the side near the fixed plate, with a partition plate installed between the first plug-in seat and the second plug-in seat.

[0010] Furthermore, the fit between the partition plate and the first and second connectors is an interference fit.

[0011] Furthermore, mounting strips are formed at both ends of the fixing plate.

[0012] Furthermore, the mounting strip has through holes, and steel nails are installed in the through holes.

[0013] Furthermore, the middle partition divides the fixing plate into an upper fixing sub-plate and a lower fixing sub-plate, and the upper fixing sub-plate is provided with a plurality of water-permeable holes.

[0014] Furthermore, a double-layer self-adhesive waterproof membrane is applied to the outer side of the arched panel, and several through holes are formed on the double-layer self-adhesive waterproof membrane, which are matched with the water-permeable holes on the upper arched sub-panel.

[0015] Furthermore, the upper water inlet chamber is connected to a circumferential blind pipe, and the circumferential blind pipe is wrapped with non-woven fabric; the lower drainage chamber is connected to a transverse drainage pipe.

[0016] Furthermore, a drainage sleeve is provided inside the lower drainage cavity, and the drainage sleeve can be connected to the transverse drainage pipe.

[0017] Compared with the prior art, the beneficial effects of this utility model are: through the combined structural design of the arched plate and the partition plate, this utility model can achieve drainage in the upper and lower chambers while using the arched structure to disperse external pressure and avoid damage caused by stress concentration. It has the advantages of relieving stress concentration, improving drainage efficiency and pressure resistance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is the right view of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of this utility model when steel nails are installed;

[0021] Figure 4 This is a schematic diagram of the structure of the second embodiment of the present utility model. Detailed Implementation

[0022] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] In existing technologies, transportation engineering, municipal engineering, and underground construction have long faced the challenges of easily damaged drainage structures and uneven water flow resistance. Traditional trapezoidal permeable pipes are prone to structural damage under soil movement or earthquakes due to stress concentration at their corners, and abrupt changes in cross-section lead to abnormal distribution of water flow resistance. Although existing technologies, represented by CN216339928U, enhance pressure resistance through diaphragms, the stress concentration at the junction of the long and short sides of the trapezoid remains unresolved, and the internal hydrodynamic characteristics need further optimization.

[0024] To address these issues, researchers observed the mechanical advantages of arched structures in bridges and buildings, and began exploring the application of continuous curved surface morphology to drainage pipe design. By analyzing failure cases of trapezoidal structures, they discovered that cracks at the corners were mostly caused by stress concentration, leading to the proposal of an arched alternative with smooth transitions. Regarding water flow resistance, the research team drew inspiration from multi-stage filtration principles, attempting to incorporate a layered structure within the drainage channel.

[0025] First Embodiment

[0026] like Figures 1-3 As shown, an arched drainage blind pipe includes a fixed plate 1, on which an arched plate 11 is installed. A partition plate 2 is provided between the fixed plate and the arched plate, and the partition plate divides the arched plate into an upper arched sub-plate 111 and a lower arched sub-plate 112. The upper arched sub-plate and the partition plate are provided with a plurality of water-permeable holes 113.

[0027] The fixed plate refers to the basic support component that bears the main structure, and its planar extension provides a stable installation foundation for the arched structure. The arched plate refers to a flow-guiding component with a continuous arc surface, which can be manufactured through cold bending forming; its curved shape effectively disperses external loads. The partition plate refers to a vertically installed isolation component, which can be injection molded from polymer composite materials, dividing the drainage space into independent cavities. The permeable holes refer to an array of through holes penetrating the plate, which can be formed through laser cutting or die stamping; the gradient distribution of pore size achieves graded filtration.

[0028] Specifically, the fixed plate and the arched plate form an arched closed structure. When external loads are applied to the arched plate, the continuous curved surface converts the pressure into circumferential stress, which is then uniformly transmitted to the fixed plate. Water flows into the upper cavity through the permeable holes of the upper arched sub-plate, and after secondary filtration by the middle partition, it enters the lower cavity for discharge. The cornerless design of the arched structure eliminates the stress concentration points of the traditional trapezoidal shape.

[0029] Compared to existing technologies, the arched structure replaces the trapezoidal structure, eliminating the risk of stress concentration at the corners, and the continuous curved surface makes the load transfer path more rational. The central diaphragm not only achieves functional zoning, but its synergistic effect with the arched plate further enhances the overall structural rigidity.

[0030] Through the above technical solution, this application effectively improves the mechanical properties of drainage blind pipes and reduces the risk of structural damage. The staged drainage of water in the layered channel reduces resistance fluctuations, and the unique load transfer characteristics of the arched structure enable the blind pipe to maintain a stable working state under complex geological conditions.

[0031] Furthermore, the fixed plate and the arched plate form a drainage channel, and the middle partition plate divides the drainage channel into an upper water inlet chamber S1 and a lower drainage chamber S2.

[0032] The drainage channel refers to a continuous water-guiding space enclosed by a fixed plate and an arched plate. Specifically, the fixed plate and the arched plate can be connected by welding or snap-fit ​​to form a closed cavity, creating a stable water flow path. The upper inlet cavity is the area within the drainage channel located above the middle partition, used to receive and temporarily store seepage water. The lower drainage cavity is the area within the drainage channel located below the middle partition, used to direct the collected water flow. The middle partition is a horizontally installed dividing component within the drainage channel, which can be made of polymer sheet or stamped metal sheet, used to divide the water flow path into upper and lower independent cavities.

[0033] Specifically, after the water undergoes preliminary filtration in the upper inlet chamber, it enters the lower outlet chamber through the guide channel at the edge of the middle partition, achieving stratified drainage and avoiding turbulence caused by interference between water flows of different velocities.

[0034] Compared to existing technologies, the current trapezoidal permeable pipes suffer from differences in water flow resistance due to abrupt changes in cross-section, and stress concentration easily occurs at the junction of the long and short sides. This solution uses an arched cross-section to replace the trapezoidal structure, eliminating stress concentration points at the corners through a continuous arc surface.

[0035] Furthermore, a first insertion seat 12 is provided on the side of the fixed plate near the arched plate, and a second insertion seat 13 is provided on the side of the arched plate near the fixed plate. A partition plate is installed between the first insertion seat and the second insertion seat.

[0036] The first insertion seat refers to the groove structure set on the fixed plate, and the second insertion seat refers to the groove structure set on the arched plate. The first and second insertion seats can be processed by stamping, and their inner wall contours complement the middle partition. The two sides of the middle partition are constrained within the limiting space formed by the first and second insertion seats.

[0037] Specifically, during assembly, the geometry of the first and second connectors forms a spatial positioning reference, and the partition plate is guided into the guide channel formed by them through a plug-in connection. When subjected to longitudinal loads, the first and second connectors decompose the load into vertical components, which are then transmitted to the main structure of the fixed plate and arched plate through the contact surfaces. Lateral displacement is constrained by the contact friction between the sidewalls of the connectors and the edge of the partition plate, preventing the partition plate from slipping under dynamic loads. During assembly, the operator only needs to push the partition plate along the track formed by the connectors to complete the positioning, without the need for additional adjustments to the alignment accuracy.

[0038] In a more detailed design, the partition plate is fitted with the first and second connectors using an interference fit.

[0039] An interference fit refers to a situation where two connecting parts have dimensional interference during assembly, requiring external force to press them together for a tight connection. Specifically, this can be achieved by designing the diameter of the connector hole to be slightly smaller than the thickness of the partition plate, generating radial clamping force through the elastic deformation of the material. This fit method forms a gapless, rigid connection after assembly, using the friction between the contact surfaces to resist external shear forces.

[0040] Specifically, when the partition plate is inserted into the first and second connectors, its thickness forces the connector hole walls to expand elastically, creating continuous compressive stress at the contact surface. This compressive stress is converted into friction, preventing relative displacement between the partition plate and the connectors. Under lateral loads caused by external vibrations or soil movement, the friction directly counteracts the shear force, preventing loosening of the connection. Since no bolts or adhesives are required, this structure will not fail due to corrosion or aging during long-term use.

[0041] Compared to existing technologies, traditional drainage structures often use clearance fits or threaded connections for the baffles. Clearance fits are prone to micro-displacement accumulation under dynamic loads, leading to misalignment of the permeable holes; threaded connections require additional fasteners and are subject to corrosion risks. Interference fits achieve self-locking through physical interference, eliminating assembly clearances and avoiding the use of easily damaged parts.

[0042] Through the above technical solution, this application effectively prevents the separation of the partition plate and the connector under external force, ensuring the long-term structural stability of the drainage channel. The permeable holes are precisely aligned, avoiding water flow path disruption caused by loose connections. This fitting method simplifies the assembly process and reduces maintenance costs.

[0043] Furthermore, mounting strips 14 are formed at both ends of the fixing plate. These mounting strips are existing technology and will not be explained in detail.

[0044] In at least one embodiment, the mounting strip has a through hole, and a steel nail is installed in the through hole, which can be inserted into the arch wall 6.

[0045] The mounting strip refers to the strip-shaped structure extending from both ends of the fixing plate, which can be made by stamping metal sheets. Its function is to physically connect the drainage blind pipe to the foundation. The through hole refers to a circular hole penetrating the thickness of the mounting strip, which can be made by drilling or punching. Its function is to provide a vertical penetration path for the steel nail and restrict its displacement. The steel nail refers to a columnar fastener with a nail head, which can be made of carbon steel with a galvanized surface.

[0046] In at least one embodiment, the partition plate divides the fixing plate into an upper fixing sub-plate 101 and a lower fixing sub-plate 102, and the upper fixing sub-plate is provided with a plurality of water-permeable holes.

[0047] The upper fixed sub-plate refers to the plate-like structure located above the central partition plate. It can be made of stamped metal sheet, and the diameter of the permeable holes on its surface can be 2-4 mm to allow water flow while maintaining structural integrity. The lower fixed sub-plate refers to the plate-like structure located below the central partition plate. Its thickness can be 1.2-1.5 times that of the upper fixed sub-plate, and it is used to bear the main load transfer function.

[0048] Second Embodiment

[0049] The difference from the first embodiment is that a double-layer self-adhesive waterproof membrane 4 is applied to the outer side of the arched plate, and a plurality of through holes are formed on the double-layer self-adhesive waterproof membrane, which are matched with the water-permeable holes on the upper arched sub-plate.

[0050] Double-layer self-adhesive waterproof membrane refers to a composite structure formed by two layers of self-adhesive material, specifically achieved using a polymer laminate. The double-layer design enhances compressive strength and environmental adaptability, dispersing the shear force of external loads on the waterproof layer. The matching of through-holes and permeable holes means that the through-holes on the membrane are axially aligned with the permeable holes of the arched sub-slab. This can be achieved through a pre-punching process, ensuring that external seepage is directed into the drainage channel, preventing drainage blind spots after the waterproof layer is applied. Specifically, the double-layer self-adhesive waterproof membrane adheres tightly to the outside of the arched slab through its self-adhesive properties, forming a seamless waterproof barrier. The correspondence between the through-holes and permeable holes allows external seepage to directly enter the permeable holes of the upper arched sub-slab, maintaining the continuity of the drainage path.

[0051] Furthermore, the upper water inlet chamber S1 is connected to a circumferential blind pipe 7, and the circumferential blind pipe is wrapped with non-woven fabric; the lower drainage chamber S2 is connected to a transverse drainage pipe 5.

[0052] Among them, the circumferential blind pipe refers to a water guiding pipe arranged circumferentially along the engineering structure, which can be implemented using high-density polyethylene corrugated pipes. Its circumferential arrangement can evenly distribute the water flow in multiple directions. The non-woven fabric refers to a filter layer formed by a hot-pressing process of synthetic fibers, which can be implemented using polypropylene spunbond non-woven fabric. Its fiber gaps can prevent soil particles from entering the pipe. The transverse drainage pipe refers to a water guiding pipe extending longitudinally along the engineering structure, which can be implemented using perforated PVC pipes. Its straight extension characteristic can maintain a stable water flow velocity.

[0053] In some specific implementations, the circumferential blind pipe can adopt a segmented connection structure, for example, each pipe section with a length of 1.5 meters can be connected through a socket joint. The non-woven fabric can be of a specification of 200g / ㎡ in terms of unit area mass, with a 10% overlap allowance when wrapping. The transverse drainage pipe can be set with a drainage slope of 0.5%, and the pipe wall opening ratio can be controlled within the range of 15%-20%.

[0054] Furthermore, a drainage sleeve 8 is provided inside the lower drainage cavity. The drainage sleeve can be connected to the transverse drainage pipe.

[0055] Among them, the drainage sleeve refers to the pipe connection structure set inside the lower drainage cavity. Specifically, it can be made of high-density polyethylene material into a tubular component. The drainage sleeve uses a material with an elastic modulus higher than that of the horizontal drainage pipe. Specifically, it can be made of polypropylene composite material reinforced with glass fiber, and its bending strength can reach more than 40MPa.

[0056] Compared to existing technologies, the drainage channels of conventional trapezoidal permeable pipes are directly connected to external pipes, making the connection seals prone to failure due to water flow impact. This solution, however, utilizes a multi-stage buffer structure formed by the sleeve in the drainage system to gradually dissipate water flow energy before it enters the transverse drainage pipe, achieving graded reduction of water flow impact and preventing leakage at the connection points due to sudden pressure changes.

[0057] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An arched drainage blind pipe, comprising a fixing plate, characterized in that, An arched plate is installed on the fixed plate, and a partition plate is provided between the fixed plate and the arched plate. The partition plate divides the arched plate into an upper arched sub-plate and a lower arched sub-plate. The upper arched sub-plate and the partition plate are provided with a number of water-permeable holes.

2. The arched drainage blind pipe according to claim 1, characterized in that, The fixed plate and the arched plate form a drainage channel, and the middle partition plate divides the drainage channel into an upper water inlet chamber and a lower drainage chamber.

3. The arched drainage blind pipe according to claim 1, characterized in that, The fixed plate has a first plug-in seat on the side near the arched plate, and the arched plate has a second plug-in seat on the side near the fixed plate. A partition plate is installed between the first plug-in seat and the second plug-in seat.

4. The arched drainage blind pipe according to claim 3, characterized in that, The partition plate is fitted with the first and second connectors by an interference fit.

5. The arched drainage blind pipe according to claim 1, characterized in that, The fixing plate has mounting strips at both ends, and through holes are provided on the mounting strips. Steel nails are installed in the through holes.

6. The arched drainage blind pipe according to claim 1, characterized in that, The partition plate divides the fixing plate into an upper fixing sub-plate and a lower fixing sub-plate, and the upper fixing sub-plate is provided with a number of water-permeable holes.

7. The arched drainage blind pipe according to claim 1, characterized in that, The outer side of the arched panel is covered with a double-layer self-adhesive waterproof membrane, and the double-layer self-adhesive waterproof membrane has several through holes, which are matched with the water-permeable holes on the upper arched sub-panel.

8. The arched drainage blind pipe according to claim 2, characterized in that, The upper water inlet chamber is connected to a circumferential blind pipe, which is wrapped with non-woven fabric; the lower drainage chamber is connected to a transverse drainage pipe.

9. The arched drainage blind pipe according to claim 2, characterized in that, The lower drainage chamber is equipped with a drainage sleeve, which can be connected to the horizontal drainage pipe.

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