Drainage pipeline anti-seepage and anti-settlement connecting structure
By using a displacement compensation structure of bentonite mortar and waterproof blanket at the connection of drainage pipes, the leakage problem caused by uneven settlement was solved, achieving a highly efficient anti-seepage and anti-settlement effect.
Patent Information
- Application Number
- CN202521841253.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-27
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-08-27
AI Technical Summary
Existing drainage pipe connections are prone to cracking and leakage under uneven settlement conditions, and flexible connections rely on material deformation, which reduces sealing durability.
Bentonite mortar is used to fill the gaps between the joints, combined with a waterproof blanket and displacement compensation structure, and secured with lubricant and stainless steel cable ties to form a composite waterproof barrier that self-repairs when micro-cracks appear.
It improves the deformation compensation capability of pipe connections, enhances sealing durability, prevents leakage, and extends service life.
Smart Images
Figure CN224680319U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a connection structure for preventing seepage and settlement in drainage pipes. Background Technology
[0002] Drainage pipeline engineering is an important component of municipal engineering and a crucial basic infrastructure in cities. With the further development of urbanization in my country, drainage pipelines in urban municipal engineering face uneven settlement under complex foundation load conditions. Uneven settlement can cause the anti-seepage sealing measures at pipe joints to crack and fail, leading to leakage of the water contents. Prolonged uneven settlement can seriously affect the bearing capacity of the drainage pipeline foundation and the surrounding soil environment.
[0003] Existing drainage pipe connection methods can be divided into two modes: rigid connection and flexible connection. Among them, flexible connection has better deformation adaptability than rigid connection. However, existing flexible connection methods rely entirely on the deformation of flexible materials to compensate for the deformation at the pipe connection position. Therefore, the degree of deformation is affected by the mechanical properties of the material. At the same time, the flexible material connection seal operates under tension, which affects its sealing durability under minor damage. Therefore, to address the above problems, a seepage-proof and settlement-resistant connection structure for drainage pipes is proposed. Utility Model Content
[0004] This invention provides a connection structure for drainage pipes that prevents seepage and settlement, which can effectively solve the above problems.
[0005] This utility model is implemented as follows:
[0006] A connection structure for preventing seepage and settlement in drainage pipes, comprising:
[0007] A first drainage pipe and a second drainage pipe connected to the first drainage pipe, one end of the second drainage pipe is provided with a socket, the first drainage pipe is inserted into the socket, there is an insertion gap between the first drainage pipe and the socket, the insertion gap is filled with bentonite mortar, the outer wall of the first drainage pipe is covered with a first waterproof blanket, the outer wall of the second drainage pipe is covered with a second waterproof blanket, and a displacement compensation structure is provided at the overlap of the first waterproof blanket and the second waterproof blanket.
[0008] The displacement compensation structure includes an overlap where the end of the first waterproof blanket overlaps the end of the second waterproof blanket, and a lubricant disposed in the middle of the overlap.
[0009] As a further improvement, both the first and second waterproof blankets include, in order from the outside to the inside, a geomembrane, a bentonite layer, and an uncoated geotextile.
[0010] As a further improvement, the overlap includes a geomembrane of a first waterproof blanket and a geomembrane of a second waterproof blanket, with a lubricant disposed between the geomembrane of the first waterproof blanket and the geomembrane of the second waterproof blanket.
[0011] As a further improvement, the ends of the first and second waterproof blankets furthest from the overlap are secured with stainless steel cable ties.
[0012] As a further improvement, bentonite mortar is provided between the stainless steel cable tie binding point of the first waterproof blanket and the first drainage pipe, and bentonite mortar is provided between the stainless steel cable tie binding point of the second waterproof blanket and the second drainage pipe.
[0013] As a further improvement, a sealing ring is provided in the insertion gap.
[0014] The beneficial effects of this utility model are as follows: This technical solution solves the problem that existing flexible pipeline connection construction schemes rely on the deformation of the material itself to compensate for displacement, resulting in small allowable displacement and reduced durability after connection deformation. Because of the existence of the displacement compensation structure, this type of connection can still achieve connection deformation compensation under normal constraints (soil, self-weight pressure of concrete pipe, concrete or cement mortar encapsulation, etc.), and after deformation compensation, its bentonite waterproof blanket can still remain in a non-stretched state, so that the upper limit of pipeline connection deformation is not limited by the mechanical properties of the material, and significantly improves the durability of the connection seal. There is a densely filled bentonite mortar at the pipeline connection. When small leakage cracks appear on the inner side of the pipeline connection due to deformation, the bentonite mortar will absorb water, expand, and solidify, sealing the leakage cracks on the inner side of the pipe connection, forming a new sealing structure for the connection, and avoiding the overall reduction in durability of the connection structure due to long-term leakage and soaking. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0016] Figure 1 This is a cross-sectional schematic diagram of the connection structure for the drainage pipe anti-seepage and anti-settlement of this utility model.
[0017] Figure 2 yes Figure 1 A magnified structural diagram of point A in the middle.
[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the first and second waterproof blankets.
[0019] Figure 4 This is a schematic diagram of the structure of the drainage pipe of this utility model installed on a concrete base.
[0020] The attached diagram is labeled as follows:
[0021] 10. First drainage pipe;
[0022] 20. Second drainage pipe; 21. Socket part; 22. Insertion gap;
[0023] 30. Bentonite mortar;
[0024] 40. First waterproof blanket; 41. Geomembrane; 42. Bentonite layer; 43. Uncovered geotextile;
[0025] 50. Second waterproof blanket;
[0026] 60. Displacement compensation structure; 61. Overlap joint; 62. Lubricant;
[0027] 70. Stainless steel cable ties;
[0028] 80. Sealing ring. Detailed Implementation
[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.
[0030] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0031] Reference Figures 1-2 As shown, a connection structure for preventing seepage and settlement in drainage pipes includes:
[0032] A first drainage pipe 10 and a second drainage pipe 20 connected to the first drainage pipe 10. One end of the second drainage pipe 20 is provided with a socket 21. The first drainage pipe 10 is inserted into the socket 21. There is an insertion gap 22 between the first drainage pipe 10 and the socket 21. The insertion gap 22 is filled with bentonite mortar 30. The outer wall of the first drainage pipe 10 is covered with a first waterproof blanket 40. The outer wall of the second drainage pipe 20 is covered with a second waterproof blanket 50. A displacement compensation structure 60 is provided at the overlap of the first waterproof blanket 40 and the second waterproof blanket 50.
[0033] The displacement compensation structure 60 includes an overlap portion 61 where the end of the first waterproof blanket 40 overlaps the end of the second waterproof blanket 50, and a lubricant 62 disposed in the middle of the overlap portion 61. The lubricant 62 in the middle of the overlap portion allows the two waterproof blankets to slide relative to each other when subjected to force, thereby reducing stress concentration and material fatigue caused by displacement and extending service life.
[0034] Reference Figure 3 As shown, both the first waterproof blanket 40 and the second waterproof blanket 50 include, from the outside to the inside, a geomembrane 41, a bentonite layer 42, and an uncoated geotextile 43, forming a composite waterproof barrier. The bentonite expands upon contact with water to form a gel-like sealing layer, further enhancing the seepage prevention effect and enabling it to self-repair even when tiny cracks appear.
[0035] The overlapping portion 61 includes the geomembrane 41 of the first waterproof blanket 40 and the geomembrane 41 of the second waterproof blanket 50, and a lubricant 62 is provided between the geomembrane 41 of the first waterproof blanket 40 and the geomembrane 41 of the second waterproof blanket 50.
[0036] The first waterproof blanket 40 and the second waterproof blanket 50 are secured together at their ends away from the overlap 61 using stainless steel cable ties 70. Bentonite putty 80 is applied between the first waterproof blanket 40 at the point where it is secured with the stainless steel cable ties 70 and the first drainage pipe 10. Bentonite putty 80 is also applied between the second waterproof blanket 50 at the point where it is secured with the stainless steel cable ties 70 and the second drainage pipe 20. The use of stainless steel cable ties 70 for securing the blankets, combined with the filling with bentonite putty 30, ensures a tight bond between the waterproof blankets and the pipes, preventing loosening or displacement, and enhancing the overall mechanical stability of the structure.
[0037] A sealing ring 80 is provided in the insertion gap 22. The addition of the sealing ring in the insertion gap further improves the sealing performance at the interface and is suitable for higher requirements of seepage prevention.
[0038] The installation method for this structure is as follows:
[0039] Mark the predetermined pipe connection area on the first waterproof blanket 40 and the second waterproof blanket 50, and mark the range of the inward displacement compensation structure 60 at the other end. Then remove the uncoated geotextile 43 and bentonite layer 42 within the range, leaving only the geotextile layer with a membrane 41. Then fold the remaining geotextile 41 onto the bentonite waterproof blanket near the pipe connection area. In other embodiments, the overlap 61 can be S-shaped. After folding, apply lubricant to the folded surface of the displacement compensation structure 60. Finally, apply bentonite putty 30 to the area where the first waterproof blanket 40 and the second waterproof blanket 50 are expected to be bound and fastened, and where they contact the connection area of the first drainage pipe 10 and the second drainage pipe 20, as well as to the overlap 61 of the waterproof blanket.
[0040] After the installation of the pipe rubber sealing ring 80 and the pipe connection is completed, the first drainage pipe 10 and the socket 21 have an insertion gap 22. Bentonite putty 30 is used to fill the gap, and large pieces of bentonite putty 30 are used to build a slope or mound structure at the pipe connection point to form a sealing structure.
[0041] Bentonite mortar 30 is filled at the outer seams and overlaps of the first waterproof blanket 40 and the second waterproof blanket 50. When filling the seams with bentonite waterproof mortar, the seams to be filled should be filled tightly and fully to avoid voids and cracks.
[0042] Reference Figure 4 As shown, the concrete base 90 of the pipe is poured outside the pipe connection. During the pouring, the interface between the connection and the concrete base needs to be vibrated to prevent the concrete aggregate from getting too close to the pipe connection and damaging the bentonite waterproofing blanket on the outside of the connection when the connection deforms.
[0043] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A connection structure for preventing seepage and settlement in drainage pipes, characterized in that, include: A first drainage pipe (10) and a second drainage pipe (20) connected to the first drainage pipe (10). One end of the second drainage pipe (20) is provided with a socket (21). The first drainage pipe (10) is inserted into the socket (21). There is an insertion gap (22) between the first drainage pipe (10) and the socket (21). The insertion gap (22) is filled with bentonite mortar (30). The outer wall of the first drainage pipe (10) is covered with a first waterproof blanket (40). The outer wall of the second drainage pipe (20) is covered with a second waterproof blanket (50). A displacement compensation structure (60) is provided at the overlap of the first waterproof blanket (40) and the second waterproof blanket (50). The displacement compensation structure (60) includes an overlap (61) where the end of the first waterproof blanket (40) overlaps the end of the second waterproof blanket (50), and a lubricant (62) disposed in the middle of the overlap (61).
2. The connection structure for preventing seepage and settlement in drainage pipelines according to claim 1, characterized in that, The first waterproof blanket (40) and the second waterproof blanket (50) both include a seepage-proof membrane (41), a bentonite layer (42), and an uncoated geotextile (43) arranged sequentially from the outside to the inside.
3. The connection structure for seepage prevention and settlement resistance of drainage pipelines according to claim 1, characterized in that, The overlapping portion (61) includes the geomembrane (41) of the first waterproof blanket (40) and the geomembrane (41) of the second waterproof blanket (50), and a lubricant (62) is provided between the geomembrane (41) of the first waterproof blanket (40) and the geomembrane (41) of the second waterproof blanket (50).
4. The connection structure for seepage prevention and settlement resistance of drainage pipelines according to claim 1, characterized in that, The first waterproof blanket (40) and the second waterproof blanket (50) are tied and secured at the ends away from the overlap (61) by stainless steel cable ties (70).
5. The connection structure for seepage prevention and settlement resistance of drainage pipelines according to claim 4, characterized in that, The first waterproof blanket (40) is provided with bentonite mortar (30) between the binding point of the stainless steel cable tie (70) and the first drainage pipe (10), and the second waterproof blanket (50) is provided with bentonite mortar (30) between the binding point of the stainless steel cable tie (70) and the second drainage pipe (20).
6. The connection structure for seepage prevention and settlement resistance of drainage pipelines according to claim 1, characterized in that, A sealing ring (80) is provided in the insertion gap (22).