Drainage method and adaptive multi-stage buffer type flexible connector reinforced concrete socket pipe

Abstract

The invention relates to the technical field of drainage systems, in particular to a drainage method and a multi-stage buffer type flexible connector reinforced concrete socket pipe matched with the drainage method. The rainwater drainage pipeline system and the sewage drainage pipeline system are formed by connecting a plurality of multi-stage buffer type flexible connector reinforced concrete spigot and socket pipes end to end, and the rainwater drainage pipeline system is buried underground by 1.2-1.5 m. Through the design of the radial sealing ring, the axial sealing ring and the elastic ring, geological settlement displacement can be dynamically adapted, and permanent deformation caused by excessive compression or stretching of a traditional rubber ring is avoided; and meanwhile, a linkage structure of an air chamber and a pressure cavity is combined, so that the sealing pressure is automatically adjusted when settlement occurs, and the long-term effective sealing between the bell mouths and the spigots of the two multi-stage buffer type flexible connector reinforced concrete bell and spigot pipes is ensured.

Description

Technical Field

[0001] This invention relates to the field of drainage system technology, specifically to drainage methods and compatible multi-stage buffered flexible interface reinforced concrete socket pipes. Background Technology

[0002] Wastewater and stormwater drainage systems in factory areas are typically implemented separately, meaning they have independent and unconnected piping systems. Both systems generally use reinforced concrete socket pipes for construction to achieve high structural strength, corrosion resistance, and a long service life. However, in practical applications, especially in areas with unstable geological conditions, such as soft soil foundations, backfilled areas, or seismically active zones, geological settlement often leads to pipeline system damage, severely impacting drainage function and even causing safety accidents.

[0003] Traditional reinforced concrete socket pipes rely primarily on rubber ring seals. When uneven settlement occurs in the foundation, misalignment, pull-out, or compression deformation can easily occur at the pipe joints, leading to seal failure and causing leakage or sewage overflow. This is especially true in systems with parallel rainwater and sewage pipes, where different burial depths result in more significant settlement differences, further exacerbating the risk of joint damage. Geological settlement causes pipes to bear additional bending and shear forces, while ordinary reinforced concrete pipes have limited deformation resistance. Under long-term action, circumferential cracks or longitudinal fractures can easily develop at the socket joints, affecting drainage capacity and potentially causing further foundation collapse. Existing technologies typically use rigid or simple flexible joints, lacking adaptive buffering mechanisms. Once settlement occurs, manual excavation and repair are often required, which is not only costly but also disrupts normal plant operations. Furthermore, the intersections of rainwater and sewage pipes are more prone to settlement damage due to complex stress conditions, but current technologies lack targeted reinforcement measures.

[0004] Currently, common solutions for pipeline damage caused by geological settlement include: increasing pipe wall thickness (which improves compressive strength but cannot effectively alleviate relative displacement at the joints); using fully flexible joints (allowing some displacement, but long-term repeated deformation can lead to fatigue failure of the sealing material); and concrete pile reinforcement (high cost and cannot completely avoid local settlement differences). None of these solutions fundamentally solve the problem of coordinated adaptation of dual-pipeline systems under differential settlement, especially in the case of parallel laying of rainwater and sewage pipelines. Ensuring that both types of pipelines maintain sealing and structural integrity during settlement remains a technical challenge for the industry. Summary of the Invention

[0005] The purpose of this invention is to provide a drainage method and a suitable multi-stage buffered flexible interface reinforced concrete socket pipe to solve the problem that the drainage system in the factory area is easily affected by geological subsidence, causing the reinforced concrete socket pipe system to be easily damaged.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A drainage method includes a rainwater drainage pipe system and a sewage drainage pipe system. The rainwater drainage pipe system and the sewage drainage pipe system are composed of multiple multi-stage, buffered, flexible-joint reinforced concrete socket pipes connected end-to-end. The rainwater drainage pipe system is buried 1.2–1.5m underground, and the sewage drainage pipe system is buried 2.0–2.5m underground. The minimum height difference between the sewage drainage pipe system and the rainwater drainage pipe system is ≥0.5m, and the minimum horizontal distance ranges from 0.4m to 1.0m. The method involves connecting the rainwater drainage pipe system and the sewage drainage pipe system... Spacing is set in both the horizontal and vertical directions to form a stepped layout. Compared with the vertical layout, the stepped layout reduces the vertical overlap between the rainwater and sewage drainage systems. When repairing the sewage drainage system, it is not necessary to damage the upper rainwater drainage system, which helps to save maintenance costs. Compared with the horizontal parallel layout, the stepped layout allows the sewage drainage system to meet the technical requirements of deeper burial, thereby reducing the impact of surface soil settlement on the sewage drainage system. At the same time, the shallow burial of the rainwater drainage system can save construction costs.

[0008] The rainwater drainage system employs natural drainage, with its outlet connected to a natural water body. Natural drainage requires no external power and, combined with the system's pipe diameter design, is suitable for high-flow-rate rainwater discharge scenarios, effectively handling heavy rain. The wastewater discharge system employs forced drainage, with a pumping station at its inlet and its outlet connected to a wastewater treatment plant. During wastewater discharge, wastewater from the factory is introduced into the pumping station, which pressurizes the wastewater. The pressurized wastewater then flows through the sewage discharge pipeline system to the wastewater treatment plant for treatment, thus achieving wastewater collection, treatment, and reuse. Forced drainage overcomes the height difference between the pumping station and the wastewater treatment plant, and its drainage speed is faster than natural drainage, facilitating the rapid transport of factory wastewater to the treatment plant for processing and reuse.

[0009] Preferably, the upper 1 / 4 region of the multi-stage buffer flexible interface reinforced concrete socket pipe used in the rainwater drainage pipeline system has permeable holes on its outer wall. These permeable holes penetrate both the inner and outer sides of the multi-stage buffer flexible interface reinforced concrete socket pipe. A gravel layer with a thickness of 0.3–0.5 m and a width greater than the diameter of the multi-stage buffer flexible interface reinforced concrete socket pipe is provided on the upper side of the rainwater drainage pipeline system. By providing permeable holes in the upper 1 / 4 region of the multi-stage buffer flexible interface reinforced concrete socket pipe, rainwater infiltrating from the ground can directly enter the rainwater drainage pipeline system through these holes, thereby increasing the inflow rate of the rainwater drainage pipeline system and accelerating rainwater collection. Firstly, by setting a gravel layer on the stormwater drainage system, the soil above the system is prevented from directly entering the permeable pores and causing blockages, thus ensuring the system's water collection performance. Furthermore, the gravel layer's higher permeability than soil facilitates rainwater infiltration into the pores, accelerating the water collection rate. Moreover, if blockages occur or the drainage capacity is insufficient, water can be discharged through the permeable pores, preventing excessive water pressure and damage to the system. Additionally, the gravel layer's permeability also facilitates rainwater overflow.

[0010] At a distance of 10-12 meters before and after the intersection of the stormwater drainage system and the sewage drainage system, the stormwater drainage system employs a multi-stage buffered flexible interface reinforced concrete socket pipe without permeable holes, and both the stormwater drainage system and the sewage drainage system have concrete pile foundations on their undersides. By installing multi-stage buffered flexible interface reinforced concrete socket pipes without permeable holes at a distance of 10-12 meters before and after the intersection of the stormwater drainage system and the sewage drainage system, rainwater in this length area is prevented from being discharged from the stormwater drainage system, thus avoiding accelerated soil settlement in this length area. At the same time, since the stormwater drainage system and the sewage drainage system overlap vertically in this length area, the presence of concrete pile foundations on the undersides of both systems enhances the anti-settlement capacity in this length area, ensuring the structural integrity and service life of both systems.

[0011] Preferably, the present invention also provides a multi-stage buffer flexible joint reinforced concrete socket pipe adapted to the above-mentioned drainage method. The multi-stage buffer flexible joint reinforced concrete socket pipe includes a pipe body, a socket and a spigot. The socket and spigot are coaxially arranged at both ends of the pipe body. A first installation groove is provided on the outer wall of the spigot. A radial sealing ring is coaxially arranged in the first installation groove. A second installation groove is provided on the end face of the spigot. An axial sealing ring is provided in the second installation groove. When the two pipe bodies are mated, the outer wall of the radial sealing ring fits against the inner wall of the socket, and the axial sealing ring extends out of one end face of the pipe body and fits against the end face of the other pipe body. By setting a radial sealing ring, when geological settlement occurs, the axes of two adjacent multi-stage buffered flexible interface reinforced concrete socket pipes may form an angle or shift. The elastic extension performance of the radial sealing ring can absorb the radial displacement or shift, thereby ensuring the sealing between the two multi-stage buffered flexible interface reinforced concrete socket pipes. At the same time, the setting of the radial sealing ring avoids the use of rigid connection and sealing methods between the two multi-stage buffered flexible interface reinforced concrete socket pipes, enhancing the anti-settlement performance of the two adjacent multi-stage buffered flexible interface reinforced concrete socket pipes.

[0012] When installing two multi-stage buffered flexible joint reinforced concrete socket pipes, a crane is typically used to lift the pipes before construction workers align the spigot and socket and then insert them. During construction, impacts between the spigot and socket are unavoidable. The axial sealing ring acts as a buffer when these impacts occur, reducing the risk of damage to the spigot or socket. Its elastic extension properties absorb axial displacement, preventing axial seal failure caused by thermal expansion and contraction or geological subsidence. Furthermore, the combination of radial and axial sealing rings forms a double leak-proof barrier, thereby reducing leakage problems in sewage discharge pipeline systems.

[0013] Preferably, the inner wall of the socket includes a guide surface and a sealing surface, both of which are conical surfaces, and the taper of the guide surface is greater than that of the sealing surface. The small end of the sealing surface is connected to the end face of the pipe body, and the small end of the guide surface is connected to the large end of the sealing surface. The outer wall of the spigot is provided with a conical surface, the taper of which is the same as that of the sealing surface. The first mounting groove is coaxially disposed on the conical surface, and the inner wall of the first mounting groove is circular. By setting a guide surface on the socket, the spigot is guided into the socket during the installation of two multi-stage buffered flexible joint reinforced concrete socket pipes, facilitating the concentric positioning of the multi-stage buffered flexible joint reinforced concrete socket pipes by construction personnel. By setting a sealing surface on the socket and a conical surface on the spigot, after the spigot is inserted into the socket, the radial sealing ring is gradually squeezed after contact with the sealing surface due to the conical sealing surface, thereby achieving circumferential sealing. Moreover, the use of a conical sealing surface ensures the connection wall thickness between the socket and the pipe body, thereby ensuring the structural strength of the socket, avoiding breakage and damage at the socket due to geological settlement, and ensuring the service life of the socket.

[0014] Preferably, the radial sealing ring has an air chamber inside, and an elastic ring is provided inside the air chamber. The elastic ring is made of spring steel and includes a connecting part, a deformable part, and a sliding part. A groove is provided in the middle of the inner wall of the air chamber of the radial sealing ring. The sliding part is slidably installed in the groove. There are two deformable parts and two connecting parts. The two deformable parts are connected to the front and rear ends of the sliding part. The sliding part and the two deformable parts form a V-shape with the opening facing outward. The two connecting parts are respectively connected to the ends of the two deformable parts away from the sliding part. Both connecting parts are fixedly connected to the radial sealing ring. By setting an air chamber within the radial sealing ring, when the conical surface mates with the sealing surface, the radial sealing ring is compressed, and the gas within the air chamber is compressed, thereby increasing the deformation of the radial sealing ring. This improves the axial sealing compensation between the two multi-stage buffered flexible interface reinforced concrete socket pipes, enhancing their resistance to settlement. To prevent the radial sealing ring from losing its elasticity after prolonged compression deformation, an elastic ring is installed within the air chamber. When the radial sealing ring deforms under pressure, the deformable portion of the elastic ring deforms, adapting to the posture of the radial sealing ring after compression deformation. Simultaneously, it provides skeletal support for the radial sealing ring, ensuring circumferential sealing between the two multi-stage buffered flexible interface reinforced concrete socket pipes.

[0015] Furthermore, when geological subsidence occurs, the two multi-stage buffered flexible interface reinforced concrete socket pipes experience axial offset or axial angle formation. The deformed part of the elastic ring rebounds or undergoes adaptive elastic deformation, providing elastic force for the radial sealing ring. This ensures the fit between the outer wall of the radial sealing ring and the sealing surface, thus guaranteeing the circumferential seal between the two multi-stage buffered flexible interface reinforced concrete socket pipes.

[0016] Furthermore, when the radial sealing ring is inserted into the No. 1 installation groove, the inner ring of the radial sealing ring contacts and deforms with the conical surface. By supporting the V-shape with the sliding part and the two deformable parts facing outward, the deformable part near the pipe body has a guiding function during the pushing process, guiding the radial sealing ring into the No. 1 installation groove, which is convenient for on-site construction. At the same time, when the radial sealing ring is squeezed, the deformable part undergoes elastic deformation. Since the sliding part is slidably installed in the groove, it avoids sliding in the air chamber, ensuring that the elastic ring does not undergo axial displacement. This ensures that the elastic ring provides stable skeleton support for the radial sealing ring, ensuring circumferential sealing between the two multi-stage buffered flexible interface reinforced concrete socket pipes.

[0017] Preferably, the rotational cross sections of the second mounting groove and the axial sealing ring are both right-angled trapezoids. The rotational diameter of the right-angled side of the second mounting groove is the largest, and the bottom edge is flush with the end face of the socket. The axial sealing ring extends 10-20mm beyond the second mounting groove. A pressure chamber is provided inside the axial sealing ring, and the rotational cross section of the pressure chamber is equidistant from the rotational cross section of the axial sealing ring. By setting the No. 2 mounting groove and the axial sealing ring as a right-angled trapezoidal cross section, and simultaneously setting a pressure chamber within the axial sealing ring, when the two multi-stage buffered flexible interface reinforced concrete socket pipes are inserted and installed together, the axial sealing ring is compressed, the pressure chamber is compressed, and the gas pressure within the pressure chamber rises, thereby enhancing the axial compensation capability of the axial sealing ring and improving the anti-settlement performance between the two multi-stage buffered flexible interface reinforced concrete socket pipes. Simultaneously, when the axial sealing ring is subjected to pressure, it moves towards the bottom of the No. 2 mounting groove, improving the fit between the axial sealing ring and the No. 2 mounting groove, thus ensuring the axial sealing between the two multi-stage buffered flexible interface reinforced concrete socket pipes.

[0018] Furthermore, the sewage discharge pipeline system adopts a forced discharge method. The sewage pressure within the sewage discharge pipeline system acts on the inner wall of the axial sealing ring. The axial component of the sewage pressure on the axial sealing ring is directed towards another multi-stage buffered flexible interface reinforced concrete socket pipe, while the radial component is directed towards the outside of the socket. Under the action of the axial component, the axial sealing ring is pushed towards the other multi-stage buffered flexible interface reinforced concrete socket pipe, thereby ensuring the axial seal between the two multi-stage buffered flexible interface reinforced concrete socket pipes. Under the action of the radial component, the axial sealing ring is pushed towards the outer wall of the second mounting groove, thereby ensuring the circumferential sealing performance between the axial sealing ring and the second mounting groove.

[0019] Preferably, the end face of the axial sealing ring extending outside the second mounting groove is provided with multiple annular protrusions. All annular protrusions are coaxially arranged with the axial sealing ring and are equidistant from each other. The horizontal projections of all annular protrusions are located within the horizontal projection of the pressure chamber. By providing annular protrusions on the axial sealing ring, when two multi-stage buffered flexible interface reinforced concrete socket pipes are interlocked, the annular protrusions first contact and are compressed with the pipe body. The annular protrusions increase the deformation of the pressure chamber within the axial sealing ring, thereby improving the deformation resistance of the axial sealing ring and enhancing the settlement resistance of the multi-stage buffered flexible interface reinforced concrete socket pipes. Simultaneously, the multiple annular protrusions form a labyrinth seal, improving the axial sealing performance between the two multi-stage buffered flexible interface reinforced concrete socket pipes.

[0020] Preferably, a connecting pipe is provided between the radial sealing ring and the axial sealing ring. The two ends of the connecting pipe are respectively connected to the air chamber and the pressure chamber. A connecting hole is provided on the sidewall of each of the two deformable parts, and the connecting hole penetrates the deformable part. By connecting the air chamber and the pressure chamber through the connecting pipe, when the two multi-stage buffered flexible interface reinforced concrete socket pipes are inserted into each other, the axial sealing ring is compressed, and the gas in the pressure chamber reaches the air chamber through the connecting pipe. The gas pressure in the air chamber increases, and the radial sealing ring deforms under the gas pressure, ensuring the fit between the radial sealing ring and the sealing surface, thereby improving the circumferential sealing performance between the two multi-stage buffered flexible interface reinforced concrete socket pipes.

[0021] Preferably, the outer wall of the radial sealing ring is provided with multiple sealing protrusions, which are arranged in a horizontal array and have a semi-circular cross-section. By providing multiple sealing protrusions on the radial sealing ring, the frictional resistance during the installation of two multi-stage buffered flexible interface reinforced concrete socket pipes is reduced, facilitating construction; at the same time, the multiple sealing protrusions form a labyrinth seal, which can effectively ensure the circumferential seal between the two multi-stage buffered flexible interface reinforced concrete socket pipes.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] 1. This invention, through the design of radial sealing ring, axial sealing ring and elastic ring, can dynamically adapt to geological settlement displacement and avoid permanent deformation caused by excessive compression or stretching of traditional rubber rings; at the same time, combined with the linkage structure of air chamber and pressure chamber, it automatically adjusts the sealing pressure when settlement occurs, ensuring that the socket and spigot of the two multi-stage buffer flexible interface reinforced concrete socket pipes maintain effective sealing for a long time.

[0024] 2. This invention avoids the impact of surface runoff on the rainwater drainage pipeline system by setting a gravel layer on the system. At the same time, special reinforcement at the intersection ensures the stability of the two pipelines in the settlement-sensitive area. Furthermore, the use of concrete pile foundations for reinforcement at the intersection, combined with the design of impermeable pipe sections, effectively disperses settlement stress and reduces the risk of pipeline cracking.

[0025] 3. This invention achieves natural infiltration drainage through a combination of permeable holes and gravel layers, effectively replenishing groundwater and reducing the impact of surface runoff on the surrounding ecology. Radial and axial sealing rings completely block industrial wastewater leakage, preventing soil pollution. The cross-section anti-backflow structure ensures that sewage does not flow back into the rainwater system during heavy rain, meeting the latest environmental protection regulations. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the emission method of the present invention;

[0027] Figure 2 This is a schematic diagram of the multi-stage buffered flexible interface reinforced concrete socket pipe of the present invention;

[0028] Figure 3 This is a schematic diagram of the multi-stage buffered flexible interface reinforced concrete socket pipe with permeable holes according to the present invention.

[0029] Figure 4 for Figure 3 Full sectional view of AA;

[0030] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0031] Figure 6 for Figure 4 Enlarged view of point C in the middle;

[0032] Figure 7 This is a schematic diagram of the installation of the two multi-stage buffered flexible interface reinforced concrete socket pipes of the present invention.

[0033] Figure 8 This is a cross-sectional view of the axial sealing ring and elastic ring of the present invention.

[0034] In the diagram: 1. Rainwater drainage system; 2. Sewage drainage system; 3. Gravel layer; 4. Multi-stage buffered flexible joint reinforced concrete socket pipe; 401. Pipe body; 402. Socket; 4021. Guide surface; 4022. Sealing surface; 403. Spigot; 4031. Conical surface; 4032. Mounting groove 1; 4033. Mounting groove 2; 404. Water-permeable hole; 5. Radial sealing ring; 501. Air chamber; 502. Slide groove; 503. Sealing protrusion; 6. Axial sealing ring; 601. Pressure chamber; 602. Annular protrusion; 7. Elastic ring; 701. Connecting part; 702. Deformation part; 703. Sliding part; 704. Connecting hole; 8. Connecting pipe; 9. Hardened layer. Detailed Implementation

[0035] Please see Figures 1 to 8 This invention provides a drainage method and a multi-stage buffered flexible interface reinforced concrete socket pipe adapted to the drainage method. The technical solution is as follows:

[0036] A drainage method, see Figure 1 The system includes a rainwater drainage pipeline system 1 and a sewage drainage pipeline system 2. Both systems are composed of multiple multi-stage buffered flexible interface reinforced concrete socket pipes 4 connected end to end. The rainwater drainage pipeline system 1 is buried 1.5m underground, and the sewage drainage pipeline system 2 is buried 2.4m underground. The minimum horizontal distance between the rainwater drainage pipeline system 1 and the sewage drainage pipeline system 2 is 0.5m. The rainwater drainage pipeline system 1 uses natural drainage and its outlet is connected to a natural water body. The sewage drainage pipeline system 2 uses forced drainage and its inlet is equipped with a pumping station, while its outlet is connected to a sewage treatment plant.

[0037] See Figures 2 to 8The aforementioned multi-stage buffered flexible joint reinforced concrete socket pipe 4 includes a pipe body 401, a socket 402, and a spigot 403. The socket 402 and spigot 403 are coaxially disposed at both ends of the pipe body 401. The inner wall of the socket 402 includes a guide surface 4021 and a sealing surface 4022. Both the guide surface 4021 and the sealing surface 4022 are conical surfaces, and the taper of the guide surface 4021 is greater than the taper of the sealing surface 4022. The small end of the sealing surface 4022 is flush with the end face of the pipe body 401. The guide surface 4021 is connected to the large end of the sealing surface 4022. A tapered surface 4031 is provided on the outer wall of the socket 403, with the same taper as the sealing surface 4022. A first mounting groove 4032 is provided on the outer wall of the socket 403, coaxially mounted on the tapered surface 4031, and the inner wall of the first mounting groove 4032 is circular. A radial sealing ring 5 is coaxially mounted within the first mounting groove 4032. An air chamber 501 is provided inside the radial sealing ring 5. An elastic ring 7, made of spring steel, is installed inside the air chamber 501. The elastic ring 7 includes a connecting part 701, a deformable part 702, and a sliding part 703. A groove 502 is provided in the middle of the inner wall of the air chamber 501. The sliding part 703 is slidably installed in the groove 502. There are two deformable parts 702 and two connecting parts 701. The two deformable parts 702 are connected to the front and rear ends of the sliding part 703. The sliding part 703 and the two deformable parts... The two deformable parts 702 form a V-shape with the opening facing outward. Each sidewall of the two deformable parts 702 has a connecting hole 704 that passes through the deformable part 702. The two connecting parts 701 are respectively connected to the ends of the two deformable parts 702 away from the sliding part 703. Both connecting parts 701 are fixedly connected to the radial sealing ring 5. The outer sidewall of the radial sealing ring 5 has multiple sealing protrusions 503. The multiple sealing protrusions 503 are arranged in a horizontal array, and the cross-section of the multiple sealing protrusions 503 is semi-circular.

[0038] See Figure 4 , Figure 6 and Figure 7The end face of the socket 403 is provided with a second mounting groove 4033, and an axial sealing ring 6 is provided in the second mounting groove 4033. The rotational sections of both the second mounting groove 4033 and the axial sealing ring 6 are right-angled trapezoids. The rotational diameter of the right-angled side of the second mounting groove 4033 is the largest, and the bottom edge is flush with the end face of the socket 403. The axial sealing ring 6 extends 15mm beyond the second mounting groove 4033. A pressure chamber 601 is provided in the axial sealing ring 6. The rotational section of the pressure chamber 601 is the same as that of the axial sealing ring 6. The rotating cross sections are equidistant. A connecting pipe 8 is provided between the radial sealing ring 5 and the axial sealing ring 6. The two ends of the connecting pipe 8 are connected to the air chamber 501 and the pressure chamber 601, respectively. Multiple annular protrusions 602 are provided on the end face of the axial sealing ring 6 extending outside the second mounting groove 4033. The multiple annular protrusions 602 are all coaxially arranged with the axial sealing ring 6 and are equidistant. The horizontal projection of the multiple annular protrusions 602 is located within the horizontal projection of the pressure chamber 601.

[0039] See Figure 1 , Figure 3 and Figure 4 The upper 1 / 4 area of ​​the outer wall of the multi-stage buffer flexible joint reinforced concrete socket pipe 4 used in the rainwater drainage pipe system 1 is provided with water-permeable holes 404. The water-permeable holes 404 penetrate the inner and outer sides of the multi-stage buffer flexible joint reinforced concrete socket pipe 4. A gravel layer 3 is provided on the upper side of the rainwater drainage pipe system 1. The thickness of the gravel layer 3 is 0.5m, and the width of the gravel layer 3 is the same as the diameter of the multi-stage buffer flexible joint reinforced concrete socket pipe 4. At the intersection of the rainwater drainage pipe system 1 and the sewage drainage pipe system 2, within 10m before and after the intersection, the rainwater drainage pipe system 1 uses a multi-stage buffer flexible joint reinforced concrete socket pipe 4 without water-permeable holes 404, and both the rainwater drainage pipe system 1 and the sewage drainage pipe system 2 are provided with concrete pile foundations on their lower sides.

[0040] When laying stormwater drainage system 1 and sewage drainage system 2: See Figures 1 to 8A stepped drainage trench was dug on the ground. The sewage discharge pipeline system 2 was laid on the deeper side of the trench. During the laying of the sewage discharge pipeline system 2, a crane was used to lift the multi-stage buffered flexible joint reinforced concrete socket pipe 4 and place it into the trench. When connecting two multi-stage buffered flexible joint reinforced concrete socket pipes 4, two construction workers aligned the spigot 403 and socket 402 of the two multi-stage buffered flexible joint reinforced concrete socket pipes 4. Then, the spigot 403 of the movable multi-stage buffered flexible joint reinforced concrete socket pipe 4 was inserted into the socket 402 of the placed multi-stage buffered flexible joint reinforced concrete socket pipe 4 along the S1 direction. The movable multi-stage buffered flexible joint reinforced concrete... When the socket 4 of the multi-stage buffered flexible interface reinforced concrete socket 4 is inserted into the socket 402 of the placed multi-stage buffered flexible interface reinforced concrete socket 4, the annular protrusion 602 first contacts the end face of the tube body 401 of the placed multi-stage buffered flexible interface reinforced concrete socket 4. Then the annular protrusion 602 is squeezed, the axial sealing ring 6 is squeezed and deformed, the gas in the pressure chamber 601 is compressed, and the gas in the pressure chamber 601 enters the gas chamber 501 through the connecting pipe 8. The gas pressure in the gas chamber 501 increases, and the axial sealing ring 6 undergoes elastic deformation and expands. As the socket 403 of the moving multi-stage buffered flexible interface reinforced concrete socket 4 continues to be pushed in, the sealing protrusion 503 contacts the sealing surface 4022. Then the sealing protrusion 503 is squeezed, radially... The sealing ring 5 is compressed and deformed, the gas in the air chamber 501 is compressed, and the gas in both the air chamber 501 and the pressure chamber 601 rises. When the radial sealing ring 5 is compressed, the deformation part 702 undergoes elastic deformation, adapting to the positional change of the radial sealing ring 5. The length of the spigot 403 inserted into the socket 402 is measured with a tape measure or steel ruler. After the length of the spigot 403 inserted into the socket 402 reaches the set value, the spigot installation of the two multi-stage buffered flexible interface reinforced concrete socket pipes 4 is completed. Multiple concrete pile foundations are set within 10m before and after the intersection of the rainwater discharge pipeline system 1 and the sewage discharge pipeline system 2, and the multi-stage buffered flexible interface reinforced concrete socket pipes 4 are installed on the pile foundations to complete the laying of the sewage discharge pipeline system 2. Afterwards, earthwork is laid and compacted above the sewage discharge pipeline system 2. The earthwork is laid to the same height as the drainage trench of the rainwater discharge pipeline system 1. After compacting the earthwork, the rainwater discharge pipeline system 1 is laid. The laying process is the same as that of the sewage discharge pipeline system 2, and will not be repeated here. It is important to note that when laying the multi-stage buffer flexible interface reinforced concrete socket pipe 4 with permeable holes 404, the permeable holes 404 should be placed on the upper side. After completing the laying of the rainwater discharge pipeline system 1, earthwork is first laid to 2 / 3 of the height of the rainwater discharge pipeline system 1 from bottom to top. Then, a gravel layer 3 is laid directly above the rainwater discharge pipeline system 1. The width of the gravel layer 3 is greater than the width of the multi-stage buffer flexible interface reinforced concrete socket pipe 4. (Refer to...) Figure 1After the gravel layer 3 is laid, earth is laid until it is level with the original ground soil and compacted. A hardened layer 9 is then laid on top, and information such as the type and direction of the pipeline system is drawn on the hardened layer 9. This completes the laying of the rainwater drainage pipeline system 1 and the sewage drainage pipeline system 2.

[0041] During drainage, the rainwater drainage pipe system 1 adopts natural drainage. The outlet of the rainwater drainage pipe system 1 is connected to a natural water body. During heavy rain, rainwater that seeps from the ground into the ground can directly enter the rainwater drainage pipe system 1 through the permeable holes 404, thereby increasing the water intake of the rainwater drainage pipe system 1 and accelerating rainwater collection. When the rainwater drainage pipe system 1 is blocked or the discharge volume cannot meet the requirements, the water in the rainwater drainage pipe system 1 can be discharged out of the rainwater drainage pipe system 1 through the permeable holes 404. The overflowing rainwater seeps into the soil through the gravel layer 3. During sewage discharge, the sewage generated by the factory is introduced into the pumping station. The pumping station pressurizes the sewage. The pressurized sewage reaches the sewage treatment plant through the sewage discharge pipe system 2, and then the sewage treatment plant treats the sewage, thereby realizing the collection, treatment and reuse of sewage.

[0042] The specific embodiment of the present invention has been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the embodiments described above. For those skilled in the art, various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and ideas of the present invention should still fall within the protection scope of the present invention.

Claims

1. A drainage method using multi-stage buffered flexible joint reinforced concrete socket pipes, characterized in that, It includes a rainwater drainage pipeline system (1) and a sewage drainage pipeline system (2). The rainwater drainage pipeline system (1) and the sewage drainage pipeline system (2) are composed of multiple multi-level buffer flexible interface reinforced concrete socket pipes (4) connected end to end. The rainwater drainage pipeline system (1) is buried 1.2 to 1.5m underground, and the sewage drainage pipeline system (2) is buried 2.0 to 2.5m underground. The minimum height difference between the sewage drainage pipeline system (2) and the rainwater drainage pipeline system (1) is ≥0.5m, and the minimum horizontal distance ranges from 0.4m to 1.0m. The rainwater drainage pipeline system (1) uses natural drainage, and the outlet of the rainwater drainage pipeline system (1) is connected to a natural water body; the sewage drainage pipeline system (2) uses forced drainage, and the inlet of the sewage drainage pipeline system (2) is equipped with a pumping station, and the outlet is connected to a sewage treatment station.

2. The drainage method according to claim 1, characterized in that, The rainwater drainage pipeline system (1) uses a multi-stage buffered flexible interface reinforced concrete socket pipe (4). A water-permeable hole (304) is provided on the outer wall of the upper 1 / 4 area of ​​the multi-stage buffered flexible interface reinforced concrete socket pipe (4). The water-permeable hole (304) penetrates the inner and outer sides of the multi-stage buffered flexible interface reinforced concrete socket pipe (4). A gravel layer (3) is provided on the upper side of the rainwater drainage pipeline system (1). The thickness of the gravel layer (3) is 0.3 to 0.5 m. The width of the gravel layer (3) is the same as the diameter of the multi-stage buffered flexible interface reinforced concrete socket pipe (4). At the intersection of the rainwater drainage pipeline system (1) and the sewage drainage pipeline system (2), 10 to 12 meters before and after the intersection, the rainwater drainage pipeline system (1) adopts a multi-stage buffer flexible interface reinforced concrete socket pipe (4) with impermeable holes (304), and both the rainwater drainage pipeline system (1) and the sewage drainage pipeline system (2) are provided with concrete pile foundations on their lower sides.

3. A multi-stage buffered flexible joint reinforced concrete socket pipe adapted to claims 1 to 2, characterized in that, The multi-stage buffered flexible interface reinforced concrete socket pipe (4) includes a pipe body (301), a socket (302) and a spigot (303). The socket (302) and the spigot (303) are coaxially arranged at both ends of the pipe body (301). A first installation groove (3032) is provided on the outer side wall of the spigot (303). A radial sealing ring (5) is coaxially arranged in the first installation groove (3032). A second installation groove (3033) is provided on the end face of the spigot (303). An axial sealing ring (6) is provided in the second installation groove (3033). When the two pipe bodies (301) are engaged, the outer side wall of the radial sealing ring (5) fits against the inner side wall of the socket (302). The axial sealing ring (6) extends out of one end face of the pipe body (301) and fits against the end face of the other pipe body (301).

4. The multi-stage buffered flexible joint reinforced concrete socket pipe according to claim 3, characterized in that, The inner wall of the socket (302) includes a guide surface (3021) and a sealing surface (3022). Both the guide surface (3021) and the sealing surface (3022) are conical surfaces, and the taper of the guide surface (3021) is greater than that of the sealing surface (3022). The small end of the sealing surface (3022) is connected to the end face of the pipe body (301), and the small end of the guide surface (3021) is connected to the large end of the sealing surface (3022). The outer wall of the spigot (303) is provided with a conical surface (3031), and the taper of the conical surface (3031) is the same as that of the sealing surface (3022). The first mounting groove (3032) is coaxially arranged on the conical surface (3031), and the inner wall of the first mounting groove (3032) is circular.

5. The multi-stage buffered flexible joint reinforced concrete socket pipe according to claim 4, characterized in that, An air chamber (501) is provided inside the radial sealing ring (5), and an elastic ring (7) is provided inside the air chamber (501). The elastic ring (7) is made of spring steel and includes a connecting part (701), a deformation part (702), and a sliding part (703). A groove (502) is provided in the middle of the inner wall of the air chamber (501) of the radial sealing ring (5), and the sliding part (703) is slidably installed in the groove (502). The number of deformable parts (702) and connecting parts (701) is two. The two deformable parts (702) are connected to the front and rear ends of the sliding part (703). The sliding part (703) and the two deformable parts (702) form a V-shape with the opening facing outward. The two connecting parts (701) are respectively connected to the ends of the two deformable parts (702) away from the sliding part (703). Both connecting parts (701) are fixedly connected to the radial sealing ring (5).

6. The multi-stage buffered flexible joint reinforced concrete socket pipe according to claim 5, characterized in that, The rotational sections of the second mounting groove (3033) and the axial sealing ring (6) are both right-angled trapezoids. The rotational diameter of the right-angled side of the second mounting groove (3033) is the largest, and the bottom edge is flush with the end face of the socket (303). The axial sealing ring (6) extends 10-20mm beyond the second mounting groove (3033). A pressure chamber (601) is provided inside the axial sealing ring (6). The rotational section of the pressure chamber (601) is equidistant from the rotational section of the axial sealing ring (6).

7. The multi-stage buffered flexible joint reinforced concrete socket pipe according to claim 6, characterized in that, The axial sealing ring (6) has multiple annular protrusions (602) on one end face extending outside the second mounting groove (3033). All the annular protrusions (602) are coaxially arranged with the axial sealing ring (6) and are equidistant from each other. The horizontal projections of the annular protrusions (602) are all located within the horizontal projection of the pressure chamber (601).

8. The multi-stage buffered flexible joint reinforced concrete socket pipe according to claim 6, characterized in that, A connecting pipe (8) is provided between the radial sealing ring (5) and the axial sealing ring (6). The two ends of the connecting pipe (8) are connected to the air chamber (501) and the pressure chamber (601) respectively. A connecting hole (704) is provided on the side wall of each of the two deformable parts (702), and the connecting hole (704) penetrates the deformable part (702).

9. The multi-stage buffered flexible joint reinforced concrete socket pipe according to claim 3, characterized in that, The radial sealing ring (5) has multiple sealing protrusions (503) on its outer side wall. The multiple sealing protrusions (503) are arranged in a horizontal array, and the cross-section of the multiple sealing protrusions (503) is semi-circular.

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