Connecting structure of HDPE double-wall corrugated pipe and concrete pipe well

Abstract

The utility model discloses a kind of connecting structure of HDPE double-wall corrugated pipe and concrete pipe well, including the corrugated pipe in the reserved interface of concrete pipe well, rubber sealing ring, PE flexible pipe being located at the outer periphery of rubber sealing ring and being filled with mortar layer of PE flexible pipe, which is sleeved on the corrugated pipe.The connecting structure of the utility model is constructed, rubber sealing ring is sleeved on the corresponding place of corrugated pipe, and the section of corrugated pipe is inserted into the reserved interface of concrete pipe well, the sealing property of PE flexible pipe is tested by pressurization, vacuum is extracted after completion, and it is placed in the reserved interface, and cement mortar is injected through the feed inlet of PE flexible pipe to form mortar layer.The connecting structure of the utility model sets up the grouting PE flexible pipe between the reserved interface and corrugated pipe, utilizes grouting pressure to seal the gap between PE flexible pipe and reserved interface, plays waterproof effect, realizes rigid pipe well and the rigid-flexible transition between HDPE pipe, avoids pavement cracking, roadbed settlement and other diseases.

Description

Technical Field

[0001] The embodiments of this utility model belong to the field of water supply and drainage engineering technology, and more specifically, relate to a connection structure between an HDPE double-wall corrugated pipe and a concrete pipe well. Background Technology

[0002] Most existing municipal stormwater and sewage pipes are designed as HDPE pipes, and their inspection wells are mostly precast concrete pipe wells. In actual construction, due to variations in pipe size, errors in the reserved interface size of the pipe well, or the enlargement of the reserved interface during precasting for ease of construction, the reserved interface of the pipe well is often much larger than the pipe diameter. During interface construction, in order to facilitate the connection between the pipe and the precast pipe well structure, mortar bedding or even brick masonry is often used to reduce the deviation between the pipe and the reserved interface. This results in uncontrollable waterproofing quality, causing stormwater and sewage to infiltrate the roadbed, leading to road surface cracking, roadbed settlement, and other defects.

[0003] Therefore, there is an urgent need for a connection structure between HDPE double-wall corrugated pipe and concrete manhole, which can realize the transition between rigid manhole and HDPE pipe, ensure the sealing of the interface, play a good waterproof role, and avoid road surface cracking, roadbed settlement and other diseases caused by rainwater and sewage intrusion into the roadbed. Summary of the Invention

[0004] The existing connection structure between pipes and precast manholes can lead to uncontrollable waterproofing quality during construction, resulting in rainwater and sewage intrusion into the roadbed, causing road surface cracking and roadbed settlement. This utility model provides a connection structure between HDPE double-wall corrugated pipes and concrete manholes to solve these problems.

[0005] To achieve the above objectives, this utility model provides a connection structure between an HDPE double-wall corrugated pipe and a concrete manhole, including a corrugated pipe disposed within a reserved interface in the concrete manhole; a rubber sealing ring sleeved on the corrugated pipe; a PE flexible pipe disposed on the outer periphery of the rubber sealing ring; the inner ring of the PE flexible pipe abutting against the outer periphery of the rubber sealing ring, and its outer ring abutting against the inner wall surface of the reserved interface; and a mortar layer filling the PE flexible pipe.

[0006] Furthermore, the PE flexible pipe has a hollow structure with a monolithic cross-section, and its length is adapted to the wall thickness of the concrete well.

[0007] Furthermore, the PE flexible pipe is provided with a feed inlet at its end; the feed inlet is provided with a valve to control the opening and closing of the feed inlet.

[0008] Furthermore, the rubber sealing ring is fitted onto the corresponding part of the bellows, and it is made of ethylene propylene diene monomer (EPDM) rubber or nitrile rubber (NBR).

[0009] Furthermore, the surface of the rubber sealing ring is provided with tiny grooves or raised textures to increase the friction between the rubber sealing ring and the bellows and prevent it from shifting during construction.

[0010] Furthermore, the outer end of the PE flexible pipe is provided with a layer of steel wire mesh, the wire diameter of which is 1-2mm and the mesh spacing is 10-20mm.

[0011] Furthermore, the wire mesh and PE flexible pipe located at the outer end of the reserved interface are coated with an anti-corrosion coating, which is formed by coating with epoxy resin coating or polyurethane coating.

[0012] Furthermore, a protective layer is provided on the outside of the anti-corrosion coating, which is formed by bonding fiberglass cloth with cement and then applying mortar.

[0013] In summary, compared with the prior art, the above-described technical solution conceived by this utility model can achieve the following beneficial effects:

[0014] (1) The connection structure of this utility model is to set up a PE flexible pipe that can be grouted between the reserved interface and the corrugated pipe. The grouting pressure is used to seal the PE flexible pipe and the reserved interface, which achieves the waterproof effect. At the same time, it realizes the transition between rigid pipe well and HDPE pipe, making the construction waterproof quality controllable and avoiding the damage caused by rainwater and sewage intrusion into the roadbed, such as road surface cracking and roadbed settlement.

[0015] (2) The connection structure of this utility model, by placing the rubber sealing ring on the corresponding part of the corrugated pipe, plays a preliminary sealing role, prevents debris from entering the interface part during construction, and provides a foundation for subsequent grouting and sealing. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of a connection structure between an HDPE double-wall corrugated pipe and a concrete manhole in an embodiment of this utility model.

[0017] Figure 2 This is a front view of the connection structure in an embodiment of this utility model.

[0018] In all the accompanying drawings, the same reference numerals indicate the same technical features, specifically: 1-concrete manhole, 2-reserved interface, 3-PE flexible pipe, 4-mortar layer, 5-rubber sealing ring, 6-corrugated pipe. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0020] like Figure 1-2 As shown, this utility model provides a connection structure between an HDPE double-wall corrugated pipe and a concrete pipe well, including a corrugated pipe 6 installed in a reserved interface 2 of the concrete pipe well 1, a rubber sealing ring 5 sleeved on the corrugated pipe 6, a PE flexible pipe 3 located around the rubber sealing ring 5, and a mortar layer 4 filling the PE flexible pipe 3; the inner ring of the PE flexible pipe 3 abuts against the outer ring of the rubber sealing ring 5, and its outer ring abuts against the inner wall of the reserved interface 2. During construction, a rubber sealing ring 5 is sleeved on the corrugated pipe 6 at a corresponding location, and the corrugated pipe 6 is inserted into the reserved interface 2 of the concrete pipe well 1. The PE flexible pipe 3 is pressure tested for sealing performance. After completion, a vacuum is drawn, and the PE flexible pipe 3 is placed in the reserved interface 2, located around the rubber sealing ring 5. Cement mortar is injected through the inlet of the PE flexible pipe 3. After reaching the specified pressure, the feeding is stopped, and the mortar layer 4 is formed after the cement mortar solidifies. The connection structure of this utility model sets up a groutable PE flexible pipe 3 between the reserved interface 2 and the corrugated pipe 6. The grouting pressure is used to seal the gap between the PE flexible pipe 3 and the reserved interface 2, which achieves a waterproof effect. At the same time, it realizes the transition between rigid pipe well and HDPE pipe, making the construction waterproof quality controllable and avoiding damage such as road surface cracking and roadbed settlement caused by rainwater and sewage intrusion into the roadbed.

[0021] In this embodiment of the utility model, the concrete manhole 1 is a precast concrete manhole, which has high strength and stability, can withstand large loads, and provides a reliable support and connection foundation for the pipeline system.

[0022] The reserved interface 2 is provided through the well wall of the concrete pipe well 1, and is used to install the corrugated pipe 6 so that rainwater and sewage can be introduced into the inspection well through the corrugated pipe 6.

[0023] The corrugated pipe 6 is an HDPE double-wall corrugated pipe. As the main pipeline component, it has good flexibility, corrosion resistance and high ring stiffness, which can adapt to different geological conditions and construction requirements, while ensuring the long-term stable operation of the pipeline.

[0024] The rubber sealing ring 5 is fitted onto the corresponding part of the bellows 6, providing a preliminary sealing effect to prevent debris from entering the interface during construction and to provide a foundation for subsequent grouting sealing. The rubber sealing ring is made of a material with high elasticity, corrosion resistance, and aging resistance, including ethylene propylene diene monomer (EPDM) rubber or nitrile rubber (NBR), to adapt to different environmental conditions and working media; its surface is provided with tiny grooves or raised textures to increase the friction between the rubber sealing ring 5 and the bellows 6, preventing it from shifting during construction.

[0025] like Figure 1 As shown in the embodiment of this utility model, the PE flexible pipe 3 is a hollow structure with a monolithic cross-section. Its length is adapted to the wall thickness of the concrete pipe well 1 (i.e., the length of the PE flexible pipe 3 is the same as the length of the reserved interface). It can not only increase the load-bearing capacity at the reserved interface 2, but also provide a channel for grouting, so that cement mortar can be evenly filled in the gap between the corrugated pipe 6 and the reserved interface, thereby achieving a reliable sealing effect.

[0026] Furthermore, the wall thickness of the PE flexible pipe 3 is designed according to actual engineering requirements, generally 2-5mm, to ensure that it has sufficient load-bearing capacity and deformation resistance.

[0027] Furthermore, the PE flexible pipe 3 is provided with an inlet at one end for connecting to the grouting equipment, and should have good sealing performance to prevent grout leakage during the grouting process. Furthermore, a valve is provided on the inlet to control the opening and closing of the inlet.

[0028] By installing a groutable PE flexible pipe 3 between the reserved interface 2 and the corrugated pipe 6, the grouting pressure seals the gap between the reserved interface 2 and the corrugated pipe 6, achieving a good waterproof effect. This connection structure can effectively prevent rainwater or sewage from seeping into the roadbed from the interface, causing road surface cracking, roadbed settlement and other defects, thereby improving the service life of the road and driving safety. The hollow design of the PE flexible pipe 3 not only increases the load-bearing capacity at the interface, but also effectively disperses the stress between the pipe and the manhole, avoiding damage to the pipe or manhole due to local stress concentration. At the same time, the grout layer 4 after grouting can further enhance the structural strength at the interface and improve the load-bearing capacity of the entire connection structure.

[0029] Preferably, a layer of wire mesh is provided at the outer end of the PE flexible pipe 3 to increase the compressive strength and deformation resistance of the outer end of the reserved interface 2. The specifications of the wire mesh should be selected according to the actual engineering requirements, generally using wire mesh with a wire diameter of 1-2mm and a mesh spacing of 10-20mm. Further, an anti-corrosion coating is applied to the wire mesh and PE flexible pipe 3 at the outer end of the reserved interface 2. This coating is formed by applying epoxy resin or polyurethane coating to prevent corrosion of the wire mesh and hollow PE pipe during long-term use. The anti-corrosion coating should be applied evenly and completely, with a thickness of generally 1-2mm. Further, a protective layer is provided outside the anti-corrosion coating. This protective layer is formed by bonding fiberglass cloth with cement and then applying mortar to further protect the structure and materials of the interface. The thickness of the protective layer should be selected according to the actual engineering requirements, generally 2-5mm.

[0030] In this embodiment of the invention, the construction of the connection structure between the HDPE double-wall corrugated pipe and the concrete well includes the following steps:

[0031] S100: A rubber sealing ring 5 is fitted on the corresponding part of the corrugated pipe 6, and the corrugated pipe 6 is inserted into the reserved interface 2 of the concrete pipe well 1.

[0032] S200: Ensure that the center line of the 6-pipe is aligned with the center line of the reserved interface 2 to avoid uneven stress at the interface caused by pipe misalignment;

[0033] S300: Perform a pressure test on the PE flexible pipe 3 to ensure its airtightness;

[0034] S400: After completing the airtightness test, the PE flexible pipe 3 is evacuated and sealed with a valve;

[0035] S500: Insert the PE flexible pipe 3 into the reserved interface 2;

[0036] S600: Prepare cement mortar, connect the valve to the grouting machine, press in the cement mortar, and close the valve after it is full.

[0037] Before grouting, the PE flexible pipe 3 is vacuumed to create a negative pressure state inside, and then grouting is performed. This vacuum-assisted grouting method can effectively improve the efficiency and quality of grouting, allowing the cement mortar to fill the joint more evenly, reducing the generation of air bubbles, and improving the density and strength of the sealing layer.

[0038] During grouting operations, the grouting pressure should be adjusted appropriately based on the size of the well opening, the wall thickness of the hollow PE pipe, and the fluidity of the cement mortar. Generally, the grouting pressure should be controlled between 0.3 and 0.5 MPa. During the grouting process, a pressure sensor should be used to monitor the grouting pressure in real time to ensure its stability and uniformity. After grouting is completed, ultrasonic testing or core sampling should be used to test the density and strength of the grout layer to ensure that its quality meets design requirements. Ultrasonic testing should cover the entire grout layer, and the number of core samples should be determined based on the actual project scale, generally no less than three points.

[0039] During construction, the appearance of the joint area should be inspected regularly. This inspection should include checking the flatness of the joint, the installation of the sealing ring, and the surface quality of the grout layer. If unevenness, misalignment of the sealing ring, air bubbles, or cracks are found at the joint, these issues should be addressed promptly to ensure the joint area meets quality requirements.

[0040] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A connection structure of an HDPE double-walled corrugated pipe and a concrete pipe well, characterized by, The utility model relates to a kind of concrete pipe well interface structure, including: Corrugated pipe (6) is arranged in the reserved interface (2) of concrete pipe well (1); Rubber sealing ring (5) is sleeved on the corrugated pipe (6); PE flexible pipe (3) is arranged in the outer periphery of the rubber sealing ring (5);The inner circle of the PE flexible pipe (3) is in contact with the outer periphery of rubber sealing ring (5), and the outer circle is in contact with the inner wall of reserved interface (2); And mortar layer (4) filled in PE flexible pipe (3).

2. The connecting structure of the HDPE double-wall corrugated pipe and the concrete pipe well according to claim 1, characterized in that, The PE flexible pipe (3) is hollow structure, and its cross section is unit circle, and its length is adapted to the wall thickness of concrete pipe well (1).

3. The connection structure of the HDPE double-wall corrugated pipe and the concrete pipe well according to claim 1, characterized in that, The end of the PE flexible pipe (3) is provided with a feeding port, and a valve is arranged on the feeding port to control the opening and closing of the feeding port.

4. A connection structure of an HDPE double-wall corrugated pipe and a concrete pipe well according to any one of claims 1 to 3, characterized in that, The rubber sealing ring (5) is sleeved on the corresponding position of the corrugated pipe (6), and is made of EPDM or NBR.

5. The connection structure of the HDPE double-wall corrugated pipe and the concrete pipe well according to claim 4, characterized in that, The surface of the rubber sealing ring (5) is provided with a small groove or convex texture to improve the friction between the rubber sealing ring (5) and the corrugated pipe (6) and prevent displacement during construction.

6. A connection structure of a HDPE double-wall corrugated pipe and a concrete pipe well according to any one of claims 1 to 3, characterized in that, The outer end of the PE flexible pipe (3) is provided with a layer of steel wire mesh, and the wire diameter of the steel wire mesh is 1-2mm, and the grid spacing is 10-20mm.

7. The connection structure of the HDPE double-wall corrugated pipe and the concrete pipe well according to claim 6, characterized in that, The steel wire mesh and the PE flexible pipe (3) at the outer end of the reserved interface (2) are coated with a corrosion-resistant coating, which is coated with epoxy resin paint or polyurethane paint.

8. The connection structure of the HDPE double-wall corrugated pipe and the concrete pipe well according to claim 7, characterized in that, The outer side of the corrosion-resistant coating is provided with a protective layer, which is formed by pasting glass fiber cloth with cement and then applying mortar.

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