A socket type precast concrete pipe joint construction treatment structure

Abstract

The utility model relates to a kind of bell and spigot type precast concrete pipe joint construction processing structures, belong to concrete pipe construction structure technical field, including multi-section bell and spigot type precast concrete pipe, the end of each bell and spigot type precast concrete pipe is equipped with sleeve pipe, sleeve pipe is equipped with tapered sealing surface, the outside of the other end of each bell and spigot type precast concrete pipe is equipped with tapered sealing portion, rubber sealing sleeve is sleeved on tapered sealing portion, the junction of adjacent bell and spigot type precast concrete pipe is equipped with sealing mortar layer, the bottom of the both ends of each bell and spigot type precast concrete pipe is equipped with support block.The support block of the utility model can support bell and spigot type precast concrete pipe to lift, facilitate evenly smearing sealing mortar layer outside sleeve pipe, prevent sealing mortar layer to disconnect, by tapered sealing surface, tapered sealing portion, rubber sealing sleeve, sealing mortar layer multilayer sealing, effectively fill gap, substantially reduce leakage risk, guarantee pipeline system water delivery, drainage function stability.

Description

Technical Field

[0001] This utility model relates to a construction treatment structure for joints of socket-type precast concrete pipes, belonging to the technical field of concrete pipe construction structure. Background Technology

[0002] Precast concrete pipes with socket joints are widely used in municipal drainage and water supply pipeline projects. However, improper treatment of pipe joints can easily lead to leakage problems, affecting the normal operation of the pipeline system and potentially causing adverse consequences such as soil settlement and environmental pollution. Current construction methods for precast concrete pipes with socket joints involve sealing the joints with sealing rings and then using sealing mortar for further sealing. However, the bottom of the current precast concrete pipe is placed directly at the bottom of the foundation trench. When applying the sealing mortar, the bottom is restricted and cannot be properly sealed, affecting the sealing ring's positioning and sealing effectiveness. Utility Model Content

[0003] This utility model provides a construction treatment structure for precast concrete pipe joints with socket type, which solves the problems existing in the background art.

[0004] This utility model relates to a construction treatment structure for joints of socket-type precast concrete pipes, including multiple segments of socket-type precast concrete pipes set in a foundation trench. Each segment of the socket-type precast concrete pipe has a sleeve at one end, with a conical sealing surface inside the sleeve. The other end of each segment of the socket-type precast concrete pipe has a conical sealing part on the outside, with a rubber sealing sleeve fitted on the conical sealing part. A sealing mortar layer is provided at the connection between adjacent socket-type precast concrete pipes. Support blocks are provided at the bottom of both ends of each segment of the socket-type precast concrete pipe. A backfill sand and gravel cushion layer is provided at the bottom of the foundation trench. A concrete protective block is provided on the outside of the socket-type precast concrete pipes. A water-stabilized layer and an asphalt pavement layer are located above the concrete protective block.

[0005] As a preferred embodiment, the top of the support block is provided with an arc-shaped support groove that matches the outer wall of the socket-type precast concrete pipe, conforming to the curvature of the pipe, stabilizing the pipe, and preventing the pipe from shifting or settling during installation.

[0006] As a preferred option, the bottom center of the support block is provided with a marking groove, which can be used to align with the drawing line and quickly locate the position of the support block.

[0007] As a preferred option, the backfill sand and gravel cushion layer consists of a lower layer of crushed stone and an upper layer of medium-coarse sand. The crushed stone layer enhances the foundation bearing capacity, while the medium-coarse sand cushion layer levels and buffers, providing a stable base for the pipeline.

[0008] As a preferred embodiment, a geogrid is installed at the bottom of the backfilled sand and gravel cushion layer, and a geogrid is installed between the water-stabilized layer and the concrete protective block, with both ends of the geogrid extending to the top outer side of the foundation trench. The geogrid enhances the integrity and bearing capacity of the soil, disperses stress, prevents deformation and settlement of the foundation trench soil, and protects pipelines and road structures.

[0009] As a preferred option, one side of the concrete protective block is provided with a backfill layer of sand and gravel. This provides auxiliary filling and support, and improves structural stability.

[0010] As a preferred embodiment, the inner side of the sealing surface is provided with a vertical support platform, the outer side of the sealing surface is provided with a vertical sealing platform, the outer side of the conical sealing part is provided with a sealing plane that mates with the sealing platform, and the outer end of the rubber sealing sleeve is provided with a sealing platform supported on the sealing plane. This results in a tighter seal, multi-layer collaboration, and improved sealing reliability.

[0011] As a preferred embodiment, the outer side of the sealing platform is provided with a closed conical surface, the outer wall of the sealing platform is in contact with the sealing conical surface, the sealing mortar layer is filled into the closed conical surface and in contact with the rubber sealing sleeve, and the socket-type precast concrete pipe on the outer side of the sealing mortar layer is provided with a limiting protrusion. The setting of the limiting protrusion can facilitate the application of the sealing mortar layer.

[0012] This utility model has the following beneficial effects:

[0013] Each end of the socket-type precast concrete pipe is equipped with support blocks at its bottom, which can support and lift the pipe, facilitating the even application of a sealing mortar layer to the outside of the pipe. This prevents the sealing mortar layer from breaking. Through a multi-layered seal consisting of a conical sealing surface, a conical sealing part, a rubber sealing sleeve, and a sealing mortar layer, compared to traditional single-layer seals, it effectively fills gaps, adapts to pipe deformation caused by soil compression and water pressure, significantly reduces the risk of leakage, and ensures the stability of the pipeline system's water supply and drainage functions. The backfilled sand and gravel cushion provides a stable and uniform base, further preventing settlement. The concrete protective blocks, water-stabilized layer, and asphalt pavement layer are adapted to the road, protecting the pipeline while ensuring road load-bearing capacity and traffic flow, reducing the impact of road loads on the pipeline, and extending the service life of both the pipeline and the road. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the side connection structure of a precast concrete pipe.

[0016] Figure 3 for Figure 1 Enlarged structural diagram at point A;

[0017] Figure 4 This is a structural schematic diagram of the utility model with geogrid 1 and geogrid 2;

[0018] In the diagram: 1. Asphalt pavement layer; 2. Water-stabilized layer; 3. Concrete protective block; 4. Connecting pipe; 5. Socket-type precast concrete pipe; 6. Sealing mortar layer; 7. Support block; 8. Marking groove; 9. Support groove; 10. Backfill sand and gravel cushion layer; 11. Backfill sand and gravel layer; 12. Geogrid 1; 13. Geogrid 2; 14. Rubber sealing sleeve; 15. Conical sealing part; 16. Support platform; 17. Sealing surface; 18. Sealing platform; 19. Closed conical surface; 20. Limiting protrusion. Detailed Implementation

[0019] The present invention will be further described below with reference to the embodiments.

[0020] Example 1, as Figures 1 to 4 As shown, this utility model is a construction treatment structure for joints of socket-type precast concrete pipes, including multiple socket-type precast concrete pipes 5 set in a foundation trench. Each socket-type precast concrete pipe 5 has a sleeve 4 at one end, and a conical sealing surface 17 inside the sleeve 4. Each socket-type precast concrete pipe 5 has a conical sealing part 15 on the outer side of the other end, and a rubber sealing sleeve 14 on the conical sealing part 15. A sealing mortar layer 6 is provided at the connection of adjacent socket-type precast concrete pipes 5. Support blocks 7 are provided at the bottom of both ends of each socket-type precast concrete pipe 5. A backfill sand and gravel cushion layer 10 is provided at the bottom of the foundation trench. A concrete protective block 3 is provided on the outside of the socket-type precast concrete pipes 5. A water-stabilized layer 2 and an asphalt pavement layer 1 are above the concrete protective block 3.

[0021] During construction, surveying and setting out are conducted. Based on the design drawings, the centerline of the pipeline is measured and established. The boundary lines are determined according to the diameter of the pipeline and the specified trench width. Before excavation, white powder is used to mark the lines for control. Then, the trench is excavated. After manual leveling and compaction of the trench base, a backfill layer of sand and gravel (10) is added to the bottom of the trench. This layer is leveled manually and compacted with small machinery. A line is then drawn above the backfill layer (10) to mark the center position of the pipeline. Support blocks (7) are then placed along the marked line and at the designated position. Finally, the precast concrete pipe (5) is hoisted, ensuring its bottom is supported by the support blocks (7). The adjacent precast concrete pipes 5 are then connected by insertion, and a rubber sealing sleeve 14 is fitted onto the conical sealing part 15 at the insertion point. Then, a sealing mortar layer 6 is evenly applied to the outside of the sleeve pipe 4. Since the bottom of the precast concrete pipe 5 is supported by the support block 7, the bottom of the sleeve pipe 4 can also be coated with a sealing mortar layer 6 to ensure the sealing effect. Then, a formwork is supported on one side of the precast concrete pipe 5, and the concrete protective block 3 is poured. During the pouring, one side wall of the foundation trench serves as the side formwork for the concrete protective block 3. After the concrete protective block 3 dries, the formwork is removed, and the water-stabilized layer 2 and the asphalt pavement layer 1 are constructed.

[0022] In Example 2, based on Example 1, the top of the support block 7 is provided with an arc-shaped support groove 9 that mates with the outer wall of the socket-type precast concrete pipe 5. During installation of the socket-type precast concrete pipe 5, the bottom of the socket-type precast concrete pipe 5 is placed in the support groove 9.

[0023] The bottom center of the support block 7 is provided with a marking groove 8. When the support block 7 is placed, the marking groove 8 is aligned with the white powder line above the backfill sand and gravel cushion layer 10.

[0024] Before hoisting the socket-type precast concrete pipe 5, an inspection is required. The inner and outer surfaces of the socket-type precast concrete pipe 5 should be smooth and flat, without scratches, delamination, pinholes, impurities, breakage, etc.; the pipe end face should be flat and free of burrs and other defects.

[0025] The rubber sealing sleeve 14 is made of EPDM rubber, which is resistant to oil, acid and alkali.

[0026] The backfill sand and gravel cushion layer 10 consists of a lower layer of crushed stone and an upper layer of medium-coarse sand. During construction, a 150mm thick layer of crushed stone or gravel is first laid, with the crushed stone having a particle size of 5mm to 40mm. This is followed by a 150mm thick layer of medium-coarse sand. The bearing capacity of the foundation soil for the backfill sand and gravel cushion layer 10 should be ≥100KPa.

[0027] A geogrid 12, made of biaxially oriented plastic geogrid with a tensile strength ≥50kN / m, is installed at the bottom of the backfilled sand and gravel cushion layer 10. A geogrid 23, made of glass fiber geogrid with a tensile strength ≥30kN / m, is installed between the water-stabilized layer 2 and the concrete protective block 3. The two ends of the geogrid 23 extend to the outer top of the foundation trench.

[0028] The sealing mortar layer 6 can be a special mortar with good impermeability and internal polypropylene fiber, with a water-cement ratio ≤0.4.

[0029] A backfill sand and gravel layer 11 is provided on one side of the concrete protective block 3. After the concrete protective block 3 dries, sand and gravel are backfilled between the concrete protective block 3 and the sidewall of the foundation trench to form the backfill sand and gravel layer 11. The support blocks of the concrete protective block 3 are precast using C30-C40 concrete. The backfill sand and gravel layer 11 uses graded sand and gravel with a particle size ≤20mm, and its thickness is flush with that of the concrete protective block 3.

[0030] A vertical support platform 16 is provided on the inner side of the sealing surface 17, and a vertical sealing platform 18 is provided on the outer side of the sealing surface 17. A sealing plane that mates with the sealing platform 18 is provided on the outer side of the conical sealing part 15. A sealing platform supported on the sealing plane is provided at the outer end of the rubber sealing sleeve 14. When the rubber sealing sleeve 14 is inserted, the sealing platform is supported on the sealing plane. Before connecting the socket-type precast concrete pipe 5, the sealing surface 17, support platform 16, sealing platform 18, conical sealing part 15, sealing plane, and rubber sealing sleeve 14 need to be cleaned. After inserting the rubber sealing sleeve 14 into the conical sealing part 15...

[0031] The outer side of the sealing platform 18 is provided with a closed cone surface 19. The outer wall of the sealing platform is in contact with the sealing cone surface. The sealing mortar layer 6 fills into the closed cone surface 19 and is in contact with the rubber sealing sleeve 14. The socket-type precast concrete pipe 5 on the outer side of the sealing mortar layer 6 is provided with a limiting protrusion 20. When the sealing mortar layer 6 is applied, the inner side of the sealing mortar layer 6 is in contact with the rubber sealing sleeve 14, and the outer side of the rubber sealing sleeve 14 is in contact with the limiting protrusion 20.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0033] In the description of this utility model, the terms "inner", "outer", "longitudinal", "transverse", "upper", "lower", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not require that this utility model must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

Claims

1. A construction treatment structure for joints of precast concrete pipes with sockets, comprising multiple segments of precast concrete pipes with sockets (5) arranged in a foundation trench, wherein one end of each segment of precast concrete pipe (5) is provided with a sleeve (4), characterized in that: The sleeve (4) is provided with a conical sealing surface (17), and the other end of each socket-type precast concrete pipe (5) is provided with a conical sealing part (15). A rubber sealing sleeve (14) is fitted on the conical sealing part (15). A sealing mortar layer (6) is provided at the connection of adjacent socket-type precast concrete pipes (5). Support blocks (7) are provided at the bottom of both ends of each socket-type precast concrete pipe (5). A backfill sand and gravel cushion layer (10) is provided at the bottom of the foundation trench. A concrete protective block (3) is provided on the outside of the socket-type precast concrete pipe (5). A water-stabilized layer (2) and an asphalt pavement layer (1) are above the concrete protective block (3).

2. The construction treatment structure for socket-type precast concrete pipe joints according to claim 1, characterized in that: The top of the support block (7) is provided with an arc-shaped support groove (9) that matches the outer wall of the socket-type precast concrete pipe (5).

3. The construction treatment structure for socket-type precast concrete pipe joints according to claim 2, characterized in that: The bottom center of the support block (7) is provided with a marking groove (8).

4. The construction treatment structure for socket-type precast concrete pipe joints according to claim 1, characterized in that: The backfill sand and gravel cushion layer (10) includes a lower layer of crushed stone and an upper layer of medium and coarse sand cushion layer.

5. The construction treatment structure for socket-type precast concrete pipe joints according to claim 1, characterized in that: A geogrid 1 (12) is provided at the bottom of the backfill sand and gravel cushion layer (10), and a geogrid 2 (13) is provided between the water-stabilized layer (2) and the concrete protective block (3). The two ends of the geogrid 2 (13) extend to the top outside of the foundation trench.

6. The construction treatment structure for socket-type precast concrete pipe joints according to claim 1, characterized in that: A backfill sand and gravel layer (11) is provided on one side of the concrete protective block (3).

7. The construction treatment structure for socket-type precast concrete pipe joints according to claim 1, characterized in that: A vertical support platform (16) is provided on the inner side of the sealing surface (17), a vertical sealing platform (18) is provided on the outer side of the sealing surface (17), a sealing plane that mates with the sealing platform (18) is provided on the outer side of the conical sealing part (15), and a sealing platform supported on the sealing plane is provided on the outer end of the rubber sealing sleeve (14).

8. The construction treatment structure for socket-type precast concrete pipe joints according to claim 7, characterized in that: The sealing platform (18) has a closed cone surface (19) on its outer side. The outer wall of the sealing platform is in contact with the sealing cone surface. The sealing mortar layer (6) is filled into the closed cone surface (19) and is in contact with the rubber sealing sleeve (14). The socket-type precast concrete pipe (5) on the outer side of the sealing mortar layer (6) has a limiting protrusion (20).

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