Self-locking flexible socket joint waterproof structure and underground pipe gallery

Abstract

The application provides a flexible socket joint waterproof structure and an underground pipe gallery, and the flexible socket joint waterproof structure comprises a first concrete segment and a second concrete segment which are engaged with each other, and an elastic insert piece is fixedly connected in an elastic lock groove between the first concrete segment and the second concrete segment through structural glue, so that a continuous waterproof plate structure is formed; meanwhile, a gap between a waterproof plate and a socket port working surface is filled with a sealing waterproof material, an interface vertical limiting is formed, a second waterproof line of the waterproof structure is provided, and thus waterproof reliability is further improved. The socket joint waterproof plate structure is automatically connected and locked during socket connection, has a large redundancy of processing error, is convenient to construct, has good durability, can be applied to socket interfaces of various municipal buried pipes and linear structures such as culverts, has good deformation adaptability and waterproof reliability, is beneficial to sustainable development of social economy, and has good economic and social benefits.

Description

Technical Field

[0001] This invention relates to the field of municipal underground pipeline technology, and in particular to a self-locking, water-stopping flexible socket joint waterproof structure and an underground pipe gallery. Background Technology

[0002] Urban underground utility tunnels are a crucial infrastructure for promoting new urban development. These tunnels can comprehensively arrange vital urban infrastructure projects such as water, electricity, communications, gas, and heating, which previously lacked unified planning and design and were often disorganized. Through rational design of cross-sectional compartments and functional layouts, and proper route planning, they address the pain points of current urban lifeline projects, such as low resilience, difficult operation and maintenance, and high costs and challenges in emergency repairs. Prefabricated underground utility tunnels are a green construction technology that combines high construction efficiency with high-precision manufacturing quality. The tunnel cross-sections are highly standardized, with multiple specifications and atlases already established, and their engineering applications are widespread.

[0003] Currently, the segmental construction and waterproofing methods of precast utility tunnels are generally classified into three types of socket joints according to the national standard atlas "Precast Concrete Integrated Utility Tunnels" 18GL204: flexible socket joints, longitudinal locking socket joints, and adhesive prestressed joints. A socket joint refers to the connection between two concrete segments that are connected along the length of the utility tunnel.

[0004] Joint sealing primarily utilizes materials such as elastic rubber sealing rings and water-swellable composite sealing rings. Relying on the elasticity and cross-sectional design of the rubber material, a sealing rubber ring is formed within the joint gap through deformation or volume expansion, providing waterproof protection and thus achieving internal and external isolation of the pipe gallery. However, this rubber sealing ring waterproofing method currently faces the following problems in pipe gallery applications:

[0005] 1. Aging problem: Rubber materials are affected by oxidation, temperature, humidity and other factors, which cause them to gradually age, resulting in cracking, hardening and other phenomena, affecting their sealing performance and service life.

[0006] 2. Installation issues: Errors during manufacturing and installation may cause the rubber ring to mismatch with the size or shape of the pipe opening, thus affecting the sealing performance.

[0007] 3. Performance issues: The rubber ring has a small allowable elastic deformation to ensure sealing, which cannot meet the requirements of the flexible socket joint where there may be large relative displacement or angular deformation.

[0008] 4. Maintenance issues: The cost of inspection and maintenance of the rubber ring is high during use, and it is not easy to replace it after it fails.

[0009] Therefore, existing socket joints need to be improved to avoid the above problems. Summary of the Invention

[0010] In view of the shortcomings of the prior art described above, the present invention provides a self-locking waterproof flexible socket joint structure, the flexible socket joint waterproof structure comprising:

[0011] A first concrete segment and a second concrete segment are connected left and right along the length of the underground utility tunnel; the connecting end of the first concrete segment has a first protrusion protruding to the right, and the connecting end of the second concrete segment has a second protrusion protruding to the left, and the first protrusion and the second protrusion engage with each other.

[0012] An elastic insert is fixed to the outer surface of the first protrusion. The elastic insert is U-shaped and its opening faces to the right. An elastic locking groove is fixed to the left end face of the second protrusion near the first concrete segment. The elastic locking groove is also U-shaped and its opening faces the inside of the pipe gallery. The elastic locking groove is filled with adhesive. As the second concrete segment approaches the first concrete segment, the left end face of the second protrusion pushes the movable end of the elastic insert, causing it to deform elastically and insert into the elastic locking groove. During the insertion process, the elastic insert fully combines with the adhesive in the elastic locking groove to achieve connection and fixation. When the second concrete segment moves into place and engages with the first concrete segment, the elastic insert changes to an L-shape.

[0013] Preferably, the first protrusion is formed by the inward contraction of the outer wall of the first concrete segment, and the second protrusion is formed by the outward contraction of the inner wall of the second concrete segment. The inner surface of the first protrusion is flush with the inner wall of the first concrete segment, and the outer surface of the second protrusion is flush with the outer wall of the second concrete segment.

[0014] Preferably, the L-shaped elastic insert includes a vertical section, a horizontal section, and an arc section connecting the vertical section and the horizontal section. The vertical section is located in the elastic locking groove, the horizontal section is fixed to the outer surface of the first protrusion, and the arc section is located in the first gap between the outer surface of the first protrusion and the inner surface of the second protrusion.

[0015] Preferably, a limiting pad is fixed to the right end face of the first protrusion, and the limiting pad is located between the first protrusion and the second concrete segment to form a gap.

[0016] Preferably, there is a first gap between the outer surface of the first protrusion and the inner surface of the second protrusion, a second gap between the right end face of the first protrusion and the second concrete segment, and a third gap between the left end face of the second protrusion and the first concrete segment.

[0017] Preferably, the first protrusion has a reserved channel that runs vertically through the first protrusion for filling with waterproof sealing material. The waterproof sealing material fills the first gap and the second gap between the arc segment of the L-shaped elastic insert and the limiting pad.

[0018] Preferably, the outer end of the third gap away from the second gap is filled with caulking sealant.

[0019] Preferably, the elastic insert and elastic locking groove are continuous plate-like structures that surround the end face of the concrete segment to form a complete waterproof structure around the joint.

[0020] Preferably, the end face of the concrete segment is a closed rectangular frame, and the L-shaped elastic insert is a continuous plate-like structure surrounding the end face of the first concrete segment. The L-shaped elastic insert is a bent plate segment at the corner of the rectangular frame, and a straight plate segment at the non-corner of the rectangular frame. The bent plate segment includes a first vertical segment, a first horizontal segment, and a first arc segment. The straight plate segment includes a second vertical segment, a second horizontal segment, and a second arc segment. The first vertical segment and the second vertical segment are both parts of the vertical segment of the L-shaped elastic insert marked circumferentially. The first horizontal segment and the second horizontal segment are both parts of the horizontal segment of the L-shaped elastic insert marked circumferentially. The first arc segment and the second arc segment are both parts of the arc segment of the L-shaped elastic insert marked circumferentially.

[0021] The first vertical segment is divided into a rectangular plate and trapezoidal plates symmetrically connected to both sides of the rectangular plate along the circumference of the concrete segment. The waist of the trapezoidal plate is connected to the rectangular plate. Before the first concrete segment and the second concrete segment are engaged, the trapezoidal plate and the rectangular plate are folded at an obtuse angle of more than 90 degrees. During the engagement process, the obtuse angle fold of the trapezoidal plate and the rectangular plate gradually unfolds, and the edges of the rectangular plate and the trapezoidal plate near the elastic locking groove are gradually inserted into the segment corresponding to the elastic locking groove. After the engagement is completed, the waist of the trapezoidal plate away from the rectangular plate is overlapped and connected to the second vertical segment of the straight plate segment. The waist of the trapezoidal plate away from the rectangular plate is coated with steel structure adhesive to fix it to the second vertical segment at the overlap connection.

[0022] The present invention also provides an underground utility tunnel, including the aforementioned flexible socket joint waterproof structure.

[0023] As described above, the present invention provides a self-locking, water-stopping flexible socket joint waterproof structure and an underground pipe gallery, which has the following characteristics:

[0024] Beneficial effects:

[0025] This invention mainly solves the problem that traditional rubber sealing rings are not suitable for large deformations and installation errors during processing of flexible socket joints. At the same time, it reduces the aging problem of water-stop structure from the material level, extends service life, and reduces maintenance costs.

[0026] The elastic self-locking method has lower requirements for the processing precision of the concrete substrate at the joint of the socket than the traditional rubber sealing ring, which can improve the prefabrication yield and reduce the probability of waterproof failure caused by processing and installation errors.

[0027] The innovative waterproofing construction method uses the assembled splice as the main line of defense, and the post-grouting waterproof sealing material as the second line of defense. It has high waterproofing performance and can adapt to the large relative displacement and corner deformation of the socket, which has a wider range of application prospects and higher waterproofing reliability.

[0028] High-grade stainless steel waterstops offer better durability than traditional rubber sealing rings, significantly extending the service life of integrated utility tunnels and reducing operation and maintenance costs. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the underground utility tunnel.

[0030] Figure 2 The diagram shows the structure of the first concrete segment and the second concrete segment before they come into contact.

[0031] Figure 3 The diagram shows a schematic of the structure of the present invention, in which the elastic insert is gradually inserted into the elastic locking groove.

[0032] Figure 4 The diagram shows the structure of the first and second concrete segments of the present invention being engaged in place.

[0033] Figure 5 The diagram shows a structural schematic of the gap between the first and second concrete segments of the present invention being filled with adhesive.

[0034] Figure 6 This is a schematic diagram of the three-dimensional structure at the corner before the flexible insert is inserted.

[0035] Figure 7 This is a schematic diagram of the three-dimensional structure at the corner after the flexible insert is inserted.

[0036] Figure 8 This is a schematic diagram of the planar structure of the vertical segment of the elastic insert at the corner.

[0037] Component designation explanation

[0038] 11 First protrusion

[0039] 12 Second protrusion

[0040] 21 Flexible insert

[0041] 22 Resilient Locking Groove

[0042] 31 Limiting pad

[0043] 32 Reserved channel

[0044] 41 Waterproofing and Sealing Materials

[0045] 42 Joint sealant

[0046] 20 Bending plate segments

[0047] 30 straight-plate segments

[0048] 210 First Level Section

[0049] 310 Second Level Section

[0050] 101 First concrete segment

[0051] 102 Second concrete segment

[0052] 201 Rectangular Plate

[0053] 202 Trapezoidal Plate

[0054] 200 First vertical segment

[0055] 300 Second vertical segment Detailed Implementation

[0056] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0057] In the detailed description of embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In actual fabrication, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0058] For ease of description, spatial relation terms such as “below,” “under,” “lower than,” “below,” “above,” and “upper” may be used herein to describe the relationship between one element or feature shown in the accompanying drawings and other elements or features. It will be understood that these spatial relation terms are intended to include directions other than those depicted in the drawings for the device in use or operation. Furthermore, when a layer is referred to as being “between” two layers, it can be the only layer between the two layers, or there may be one or more layers in between. The phrase “between” as used herein includes both endpoint values.

[0059] In the context of this application, the structure described above the first feature may include embodiments in which the first and second features are formed in direct contact, or embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact.

[0060] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0061] like Figure 1 The diagram shown is a three-dimensional structural schematic of an underground utility tunnel. The tunnel is divided into multiple segments along its length, with adjacent segments connected by socket joints. The diagram of the concrete segment connections shown below can be considered as... Figure 1 Cross-sectional view along the ABCD plane.

[0062] like Figures 2 to 4 As shown, the present invention provides a self-locking waterproof flexible socket joint structure, the flexible socket joint waterproof structure comprising:

[0063] The first concrete segment 101 and the second concrete segment 102 are connected left and right along the length of the underground utility tunnel.

[0064] The connecting end of the first concrete segment 101 has a first protrusion 11 protruding to the right, and the connecting end of the second concrete segment 102 has a second protrusion 12 protruding to the left. The first protrusion 11 and the second protrusion 12 engage with each other.

[0065] Furthermore, the first protrusion 11 is formed by the inward contraction of the outer wall of the first concrete segment 101, and the second protrusion 12 is formed by the outward contraction of the inner wall of the second concrete segment 102. The inner surface of the first protrusion 11 is flush with the inner wall of the first concrete segment 101, and the outer surface of the second protrusion 12 is flush with the outer wall of the second concrete segment 102.

[0066] Furthermore, an elastic insert 21 is fixed to the outer surface of the first protrusion 11. The elastic insert 21 is U-shaped and its opening faces to the right. An elastic locking groove 22 is fixed to the left end face of the second protrusion 12 near the first concrete segment 101. The elastic locking groove 22 is also U-shaped and its opening faces the inside of the pipe gallery. The elastic locking groove 22 is filled with adhesive. As the second concrete segment 102 approaches the first concrete segment 101, the left end face of the second protrusion 12 pushes the movable end of the elastic insert 21, causing it to elastically deform and insert into the elastic locking groove 22. During the insertion process, the elastic insert 21 fully combines with the adhesive in the elastic locking groove 22 to achieve connection and fixation. When the second concrete segment 102 moves into place and engages with the first concrete segment 101, the elastic insert changes to an L-shape. The adhesive is a steel structure adhesive, specifically epoxy resin adhesive. The elastic insert and the elastic locking groove are made of finished stainless steel plates, which have better durability. The elastic locking groove 22 has a flared opening, which ensures that the movable end of the elastic insert 21 can be conveniently and automatically inserted into the elastic locking groove 22 during movement without manual intervention, while also allowing for larger processing errors and convenient construction.

[0067] It should be noted that the elastic inserts and elastic locking grooves in the cross-sectional diagram are linear structures. In reality, the elastic inserts and elastic locking grooves are continuous plate-like structures that surround the end face of the concrete segment to form a complete waterproof structure around the joint.

[0068] Furthermore, the L-shaped elastic insert includes a vertical section, a horizontal section, and an arc section connecting the vertical section and the horizontal section. The vertical section is located within the elastic locking groove 22, the horizontal section is fixed to the outer surface of the first protrusion 11, and the arc section is located within the first gap between the outer surface of the first protrusion 11 and the inner surface of the second protrusion 12.

[0069] Furthermore, a limiting pad 31 is fixed to the right end face of the first protrusion 11. The limiting pad 31 is located between the first protrusion 11 and the second concrete segment 102 to form a gap. The limiting pad 31 is a butyl rubber embedded part.

[0070] Furthermore, there is a first gap between the outer surface of the first protrusion 11 and the inner surface of the second protrusion 12, a second gap between the right end face of the first protrusion 11 and the second concrete segment 102, and a third gap between the left end face of the second protrusion 12 and the first concrete segment 101.

[0071] Furthermore, such as Figure 5As shown, the first protrusion 11 is provided with a reserved channel 32 that runs vertically through the first protrusion 11 for injecting waterproof sealing material 41. The waterproof sealing material 41 fills the first gap and the second gap between the arc segment of the L-shaped elastic insert and the limiting pad 31. The waterproof sealing material 41 is polymer waterproof mortar.

[0072] Furthermore, the outer port of the third gap, which is far from the second gap, is filled with caulking sealant 42, which is butyl rubber sealant.

[0073] Specifically, the splice of the first and second concrete segments forms the first line of defense, preventing moisture from the outside from entering the pipe gallery. The subsequently injected sealant and waterproofing material form the second line of defense, further improving waterproofing reliability. Simultaneously, the arc segment of the L-shaped elastic insert creates a barrier between gaps, also contributing to waterproofing. Compared to traditional rubber sealing methods, the socket joint of this application exhibits superior durability, and the elastic insert and elastic locking groove form a fixed connection, enhancing stability.

[0074] Furthermore, the end face of the concrete segment is a closed rectangular frame, and the L-shaped elastic insert 21 is a continuous plate-like structure surrounding the end face of the first concrete segment, such as... Figure 6 , Figure 7 As shown, the elastic insert 21 is a bent plate segment 20 at the corner of the rectangular frame, and a straight plate segment 30 at the non-corner of the rectangular frame. The bent plate segment 20 includes a first vertical segment 200, a first horizontal segment 210, and a first arc segment. The straight plate segment 30 includes a second vertical segment 300, a second horizontal segment 310, and a second arc segment. The first vertical segment 200 and the second vertical segment 300 are both parts of the vertical segment of the L-shaped elastic insert along the circumferential direction. The first horizontal segment 210 and the second horizontal segment 310 are both parts of the horizontal segment of the L-shaped elastic insert along the circumferential direction. The first arc segment and the second arc segment are both parts of the arc segment of the L-shaped elastic insert along the circumferential direction.

[0075] like Figure 8As shown, the first vertical segment 200 is divided into a rectangular plate 201 and trapezoidal plates 202 symmetrically connected to both sides of the rectangular plate along the circumference of the concrete segment. The waist of the trapezoidal plate 202 is connected to the rectangular plate 201. Before the first concrete segment 101 and the second concrete segment 102 are engaged, the trapezoidal plate 202 and the rectangular plate 201 are folded at an obtuse angle of more than 90 degrees (the specific angle can be 130-150 degrees, such as 135 degrees or 140 degrees). During the engagement process, the... The obtuse angle fold of the trapezoidal plate 202 and the rectangular plate 201 gradually unfolds, and the edges of the rectangular plate 201 and the trapezoidal plate 202 near the elastic locking groove are gradually inserted into the corresponding segments of the elastic locking groove. After the socket engagement is completed, the waist of the trapezoidal plate 202 away from the rectangular plate 201 is overlapped and connected with the second vertical segment 300 of the straight plate segment. The waist of the trapezoidal plate 202 away from the rectangular plate 201 is coated with steel structure adhesive to achieve connection and fixation with the second vertical segment 300.

[0076] Because the corners of the concrete segments are bent structures, the corresponding first vertical segments need to be designed in sections to approximate an arc shape, making it similar to the bent shape at the corners. This results in a more natural transition at the corners and reduces deformation, tearing, and other damage during splicing. Simultaneously, the trapezoidal plate and the second vertical segment of the straight plate segment are fixedly connected with structural adhesive with a certain overlap to ensure continuous sealing.

[0077] The present invention also provides an underground utility tunnel, which includes the flexible socket joint waterproof structure described above.

[0078] In summary, this invention provides a self-locking, flexible socket joint waterproof structure and an underground utility tunnel. The flexible socket joint waterproof structure includes a first concrete segment and a second concrete segment that interlock with each other. Structural adhesive between the first and second concrete segments fixes an elastic insert into an elastic locking groove, forming a continuous waterproof plate structure. Simultaneously, the gap between the first and second concrete segments is filled with a sealing and waterproofing material, forming a vertical limit on the interface and providing a second line of defense for the waterproof structure, thereby further improving the reliability of waterproofing.

[0079] The socket joint of the present invention is a self-locking water-stopping structure. The waterproof structure is automatically connected and locked during the socketing process. It has a large redundancy in processing error, is easy to construct, can adapt to the needs of large deformation conditions of the interface, has good durability, and can be applied to the socket joints of various linear structures such as municipal buried pipes and culverts. It has good deformation adaptability and waterproof reliability, which is conducive to the sustainable development of society and economy and has good economic and social benefits.

[0080] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A self-locking, water-stopping flexible socket joint waterproof structure, characterized in that, The waterproof structure of the flexible socket joint includes: A first concrete segment and a second concrete segment are connected left and right along the length of the underground utility tunnel; the connecting end of the first concrete segment has a first protrusion protruding to the right, and the connecting end of the second concrete segment has a second protrusion protruding to the left, and the first protrusion and the second protrusion engage with each other. An elastic insert is fixed to the outer surface of the first protrusion. The elastic insert is U-shaped and its opening faces to the right. An elastic locking groove is fixed to the left end face of the second protrusion near the first concrete segment. The elastic locking groove is also U-shaped and its opening faces the inside of the pipe gallery. The elastic locking groove is filled with adhesive. As the second concrete segment approaches the first concrete segment, the left end face of the second protrusion pushes the movable end of the elastic insert, causing it to deform elastically and insert into the elastic locking groove. During the insertion process, the elastic insert fully combines with the adhesive in the elastic locking groove to achieve connection and fixation. When the second concrete segment moves into place and engages with the first concrete segment, the elastic insert changes to an L-shape.

2. The flexible socket joint waterproof structure according to claim 1, characterized in that: The first protrusion is formed by the inward contraction of the outer wall of the first concrete segment, and the second protrusion is formed by the outward contraction of the inner wall of the second concrete segment. The inner surface of the first protrusion is flush with the inner wall of the first concrete segment, and the outer surface of the second protrusion is flush with the outer wall of the second concrete segment.

3. The flexible socket joint waterproof structure according to claim 1, characterized in that: The L-shaped elastic insert includes a vertical section, a horizontal section, and an arc section connecting the vertical section and the horizontal section. The vertical section is located in the elastic locking groove, the horizontal section is fixed to the outer surface of the first protrusion, and the arc section is located in the first gap between the outer surface of the first protrusion and the inner surface of the second protrusion.

4. The flexible socket joint waterproof structure according to claim 3, characterized in that: A limiting pad is fixed to the right end face of the first protrusion, and the limiting pad is located between the first protrusion and the second concrete segment to form a gap.

5. The flexible socket joint waterproof structure according to claim 4, characterized in that: There is a first gap between the outer surface of the first protrusion and the inner surface of the second protrusion, a second gap between the right end face of the first protrusion and the second concrete segment, and a third gap between the left end face of the second protrusion and the first concrete segment.

6. The flexible socket joint waterproof structure according to claim 5, characterized in that: The first protrusion has a reserved channel that runs vertically through the first protrusion for filling with waterproof sealing material. The waterproof sealing material fills the first gap and the second gap between the arc segment of the L-shaped elastic insert and the limiting pad.

7. The flexible socket joint waterproof structure according to claim 6, characterized in that: The outer port of the third gap, away from the second gap, is filled with caulking sealant.

8. The flexible socket joint waterproof structure according to claim 3, characterized in that: The elastic insert and elastic locking groove are continuous plate-like structures that surround the end face of the concrete segment to form a complete waterproof structure around the joint.

9. The flexible socket joint waterproof structure according to claim 3, characterized in that: The end face of the concrete segment is a closed rectangular frame. The L-shaped elastic insert is a continuous plate-like structure that surrounds the end face of the first concrete segment. The L-shaped elastic insert is a bent plate segment at the corner of the rectangular frame, and a straight plate segment at the non-corner of the rectangular frame. The bent plate segment includes a first vertical segment, a first horizontal segment, and a first arc segment. The straight plate segment includes a second vertical segment, a second horizontal segment, and a second arc segment. The first vertical segment and the second vertical segment are both parts of the vertical segment of the L-shaped elastic insert marked circumferentially. The first vertical segment is divided into a rectangular plate and trapezoidal plates symmetrically connected to both sides of the rectangular plate along the circumference of the concrete segment. The waist of the trapezoidal plate is connected to the rectangular plate. Before the first concrete segment and the second concrete segment are engaged, the trapezoidal plate and the rectangular plate are folded at an obtuse angle of more than 90 degrees. During the engagement process, the obtuse angle fold of the trapezoidal plate and the rectangular plate gradually unfolds, and the edges of the rectangular plate and the trapezoidal plate near the elastic locking groove are gradually inserted into the segment corresponding to the elastic locking groove. After the engagement is completed, the waist of the trapezoidal plate away from the rectangular plate is overlapped and connected to the second vertical segment of the straight plate segment. The waist of the trapezoidal plate away from the rectangular plate is coated with steel structure adhesive to fix it to the second vertical segment at the overlap connection.

10. An underground utility tunnel, characterized in that: Including the flexible socket joint waterproof structure as described in any one of claims 1-9.

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