A municipal road retaining wall deformation joint waterproof structure

Abstract

This utility model belongs to the field of municipal engineering technology, and particularly relates to a waterproof structure for expansion joints in retaining walls of municipal roads. It includes a retaining wall with expansion joints at both ends. One end of the expansion joint has a water-blocking section, and the other end has a drainage device. The drainage device includes a main frame, the outer wall of which is fitted to the expansion joint. A first baffle is located near the water-blocking section, and a second baffle is located far from it. A water pipe is installed between the two baffles, and a sealing layer is installed on the outer side of the second baffle. The main frame consists of two non-contacting frames with a serrated contact surface. The first and second baffles are each divided into two plates with a gap smaller than the diameter of the water pipe. A filter layer is installed on the side of the first baffle near the water pipe. The water pipe is hollow with water distribution holes in its wall and removable caps at both ends. An elastic structure connects the two frames within the sealing layer. The water-blocking section is fitted to the expansion joint and filled with epoxy resin adhesive, and a corrugated reinforcing frame is installed inside. This structure effectively waterproofs and drains water, extending the lifespan of the retaining wall.

Description

Technical Field

[0001] This utility model belongs to the field of municipal engineering technology, and in particular relates to a waterproof structure for expansion joints of retaining walls in municipal roads. Background Technology

[0002] In municipal road construction, retaining walls, as core concrete structures that resist slope or sloping earth collapse and ensure site and roadbed stability, have long-term service performance directly related to project safety. However, during use, retaining walls are inevitably affected by factors such as periodic changes in ambient temperature (e.g., high-temperature expansion, low-temperature contraction), fluctuations in soil lateral pressure, repeated vehicle loads, and uneven foundation settlement, leading to expansion and contraction deformation. If expansion joints are not provided to release structural stress, wall cracks can easily occur, resulting in water leakage. Leaking water not only erodes the internal steel reinforcement, accelerates concrete carbonation, and reduces structural durability, but also softens the foundation soil, weakening the foundation's bearing capacity. Even if initial cracks and leakage are minor, long-term repeated expansion and contraction deformation can still lead to structural fatigue accumulation, eventually causing the retaining wall to collapse, resulting in major safety accidents and economic losses. Therefore, the proper design of expansion joints and waterproofing treatment are key technical aspects of retaining wall engineering.

[0003] In Chinese patent announcement number CN221461291U, this utility model discloses a waterproof structure for expansion joints of retaining walls in municipal roads, including asphalt fir planks, two asphalt grooves, a water-stop copper sheet, and fixing components. The expansion joint is filled by moving the asphalt fir planks, and after inserting the water-stop copper sheet, hot melt asphalt is poured into the asphalt grooves. All components are integrated into a whole and filled into the expansion joint. The water-stop copper sheet ensures waterproofing, aiming to simplify construction and improve efficiency.

[0004] However, the existing technical solution still has obvious technical limitations: the waterproof structure relies on a single passive sealing and lacks active drainage function. It forms a sealing system with asphalt fir wood boards, hot melt asphalt and water-stop copper sheets, which can only passively prevent water from seeping into the expansion joint, but cannot drain the groundwater that has already seeped into the back wall or the expansion joint. When groundwater accumulates at the back of the expansion joint and generates water pressure, it is easy to break through the sealing system and cause leakage. Especially in long-term use, the hot melt asphalt is prone to aging and cracking, and the water-stop copper sheets are prone to deformation and damage due to the expansion and contraction of the back wall, which further aggravates the risk of leakage.

[0005] In summary, existing waterproofing technologies for retaining wall expansion joints prioritize blocking over drainage, resulting in insufficient waterproofing reliability. They fail to effectively address the durability and safety issues caused by water accumulation and leakage, as well as structural fatigue. There is an urgent need for a waterproofing structure for retaining wall expansion joints that combines active water blocking and directional drainage functions, while also being highly adaptable, durable, and easy to maintain. This would compensate for the shortcomings of existing technologies and ensure the long-term safe and stable operation of retaining wall projects. Utility Model Content

[0006] The purpose of this utility model is to address the above-mentioned technical problems by providing a waterproof structure for the expansion joint of a municipal road retaining wall, comprising: a retaining wall, wherein expansion joints are formed by clamping the two sides of the retaining wall, and one end of the expansion joint is provided with a water-blocking part, and the other end is provided with a drainage device;

[0007] The drainage device includes a main frame, the outer wall of the main frame is fitted to both ends of the expansion joint, a first baffle is provided on the side of the main frame near the water-blocking part, a second baffle is provided on the main frame away from the first baffle, a water pipe is provided between the first baffle and the second baffle, and a sealing layer is provided on the side of the second baffle away from the water pipe.

[0008] Preferably, the main frame includes a first frame and a second frame, the first frame and the second frame are arranged opposite to each other and do not contact each other, and the contact surface between the main frame and the expansion joint and the sealing layer is set in a sawtooth shape.

[0009] Preferably, both the first baffle and the second baffle are divided into two plates, which are respectively disposed inside the first frame and the second frame, and a certain interval is maintained between the two plates.

[0010] Preferably, the first baffle has a filter layer installed on the side near the water pipe.

[0011] Preferably, the water pipe has a hollow structure, and water holes are evenly distributed on the pipe wall.

[0012] Preferably, the water pipe is provided with pipe caps at both ends, the pipe caps are detachably connected to the water pipe, and the pipe caps are provided with water holes.

[0013] Preferably, the sealing layer is provided with a plurality of elastic structures, and the two ends of the elastic structures are fixedly connected to the first frame and the second frame, respectively.

[0014] Preferably, the water-blocking part is tightly fitted to both ends of the expansion joint, and the space between the water-blocking part and the expansion joint is filled with epoxy resin adhesive.

[0015] Preferably, the water-blocking part is provided with a reinforcing frame, which has a wavy, concave-convex structure.

[0016] Preferably, the distance between the first baffle and the second baffle is less than the diameter of the water pipe.

[0017] The beneficial effects of this utility model are:

[0018] This invention features a water-blocking section and a drainage device at both ends of the retaining wall expansion joint. The water-blocking section initially prevents water from seeping into the expansion joint, reducing the total amount of water penetrating into the joint. The drainage device's main frame fits snugly against both ends of the expansion joint, providing a stable foundation for subsequent waterproofing components. The first and second baffles form a layered protective space, and the water pipe efficiently collects water flowing in from behind the expansion joint and directs its discharge, preventing water from accumulating and creating high pressure at the rear, thus reducing the risk of water breaching the subsequent sealing structure. The sealing layer provides the final seal at the front of the expansion joint, preventing water leakage from the front. The overall structure effectively adapts to the deformation of municipal road retaining walls caused by temperature changes and loads. While achieving reliable waterproofing, the drainage device reduces water pressure at the rear of the expansion joint, further ensuring the durability of the waterproofing effect and solving the problem of structural deterioration caused by water accumulation and leakage in traditional retaining wall expansion joints. Attached Figure Description

[0019] Figure 1 This is an overall structural diagram of the present invention;

[0020] Figure 2 This is a first-view schematic diagram of the drainage device of this utility model;

[0021] Figure 3 This is a second-view schematic diagram of the drainage device of this utility model;

[0022] Figure 4 This is a schematic diagram of the internal structure of the drainage structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the overall water pipe of this utility model;

[0024] Figure 6 This is a schematic diagram of the water-blocking part of this utility model.

[0025] The markings in the diagram are as follows:

[0026] 1. Retaining wall; 2. Expansion joint; 3. Water-blocking section; 4. Drainage device; 5. Main frame; 6. First frame; 7. Second frame; 8. First baffle; 9. Plate; 10. Second baffle; 11. Water pipe; 12. Filter layer; 13. Pipe cover; 14. Sealing layer; 15. Elastic structure; 16. Reinforcing frame. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0028] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0029] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0030] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" 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 application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0031] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0032] Reference Figures 1-6 A waterproof structure for expansion joints of retaining walls in municipal roads includes: a retaining wall 1, with expansion joints 2 formed by clamping the two sides of the retaining wall 1, and a water-blocking part 3 provided at one end of the expansion joint 2 and a drainage device 4 provided at the other end.

[0033] The drainage device 4 includes a main frame 5, the outer wall of the main frame 5 is fitted to both ends of the expansion joint 2, a first baffle 8 is provided on the side of the main frame 5 near the water-blocking part 3, a second baffle 10 is provided on the main frame 5 away from the first baffle 8, a water pipe 11 is provided between the first baffle 8 and the second baffle 10, and a sealing layer 14 is provided on the side of the second baffle 10 away from the water pipe 11.

[0034] This application incorporates a water-blocking section 3 and a drainage device 4 at both ends of the expansion joint 2 of the retaining wall 1. The water-blocking section 3 initially blocks water at the front end of the expansion joint 2, reducing the total amount of water seeping into the expansion joint 2. The main frame 5 of the drainage device 4 fits snugly against both ends of the expansion joint 2, providing a stable installation base for subsequent waterproof components. The first baffle 8 and the second baffle 10 form a layered protective space. The water pipe 11 efficiently collects water flowing in from the rear of the expansion joint 2 and directs its discharge, preventing water from accumulating at the rear of the expansion joint 2 and generating high pressure, thereby reducing the risk of water breaching the subsequent sealing structure. The sealing layer 14 provides the final seal to the front of the expansion joint 2, preventing water leakage from the front. The overall structure effectively adapts to the deformation of the municipal road retaining wall 1 caused by temperature changes and loads. While achieving reliable waterproofing, the drainage device 4 reduces the water pressure at the rear of the expansion joint 2, further ensuring the durability of the waterproofing effect and solving the problem of structural deterioration of the retaining wall 1 due to water accumulation and leakage at the expansion joint 2 in traditional retaining walls.

[0035] In the example of this application, the main frame 5 includes a first frame 6 and a second frame 7, which are arranged opposite to each other and do not contact each other, and the contact surfaces of the main frame 5 with the expansion joint 2 and the sealing layer 14 are set in a sawtooth shape.

[0036] As a preferred example of this utility model, the main frame 5 is divided into a first frame 6 and a second frame 7 that are positioned opposite each other and do not contact each other. This allows for flexible adaptation to the width changes of the expansion joint 2 of the retaining wall 1 caused by the expansion and contraction of the retaining wall 1, preventing the overall frame from deforming under stress and causing the waterproof structure to fail. At the same time, the contact surfaces between the main frame 5 and the expansion joint 2 and the sealing layer 14 are set in a sawtooth shape, which greatly increases the contact area between the frame and the retaining wall 1 and the sealing layer 14, and improves the tightness of the fit. When in contact with the expansion joint 2, the sawtooth structure can enhance the connection stability between the frame and the retaining wall 1 and reduce the possibility of water seeping through the gap between the frame and the retaining wall 1. When in contact with the sealing layer 14, the sawtooth structure can make the sealing layer 14 more firmly embedded in the frame surface, forming a concave-convex interlocking sealing structure, further blocking the water seepage path on the contact surface, improving the sealing reliability of the overall waterproof structure, and solving the problem of leakage gaps caused by poor fit in traditional planar contact.

[0037] In the example of this application, the first baffle 8 and the second baffle 10 are each divided into two plates 9, which are respectively disposed inside the first frame 6 and the second frame 7, and a certain interval is maintained between the two plates 9.

[0038] As a preferred example of this utility model, the first baffle 8 and the second baffle 10 are divided into two plates 9 corresponding to the first frame 6 and the second frame 7, with a gap between them. The plates 9 with the gap can move synchronously with the frame to adapt to the deformation of the retaining wall 1, avoid the baffle from breaking due to deformation, and ensure long-term protection. At the same time, the gap space can buffer the water flow speed, improve drainage efficiency in conjunction with the water pipe 11, reduce the impact of water on the sealing layer 14, and facilitate maintenance and inspection, thus solving the problems of traditional integral baffles being unable to adapt to deformation and inconvenient to maintain.

[0039] In the example of this application, the first baffle 8 has a filter layer 12 installed on the side near the water pipe 11, which uses a stainless steel filter screen.

[0040] As a preferred example of this utility model, the filter layer 12 can intercept impurities such as mud, sand, and gravel in the front, preventing them from entering the water pipe 11 and clogging the pipe wall holes, ensuring that the water pipe 11 can drain smoothly for a long time and avoiding water accumulation and pressure rise behind the expansion joint 2; at the same time, it reduces the wear of impurities on the water pipe 11, extends its service life, and reduces maintenance costs.

[0041] In the example of this application, the water pipe 11 has a hollow structure, and water holes are evenly arranged on the wall of the water pipe 11.

[0042] As a preferred example of this utility model, the hollow structure provides a directional channel for water flow, ensuring orderly water discharge; the uniform through holes in the pipe wall can expand the water collection range, efficiently collect seepage water behind the expansion joint 2, improve drainage efficiency, avoid local water accumulation, and at the same time, the uniform water flow can reduce the turbulence in the pipe, ensure smooth drainage, and help reduce the water pressure behind the expansion joint 2, thus solving the problems of small water collection range and low efficiency of traditional drainage components.

[0043] In the example of this application, the water pipe 11 is provided with pipe caps 13 at both ends, and the pipe caps 13 are detachably connected to the water pipe 11 by threads, and one of the pipe caps 13 is provided with a water hole.

[0044] As a preferred example of this utility model, the pipe cover 13 with water holes can guide drainage in a directional manner to ensure that the water flow is connected to the external system; the detachable pipe cover 13 is easy to open to clean the pipe blockage and inspect the inside without disassembling the water pipe 11 as a whole, reducing the difficulty and cost of maintenance; at the same time, the pipe cover 13 can protect both ends of the pipe, reduce the entry of impurities, ensure the smooth flow of the water pipe 11, and solve the problem that the maintenance of the traditional water pipe 11 requires the whole disassembly.

[0045] The bottom end of the water pipe 11 is connected to the external drainage system.

[0046] In the example of this application, the sealing layer 14 is provided with a plurality of elastic structures 15, and the two ends of the elastic structures 15 are fixedly connected to the first frame 6 and the second frame 7 respectively.

[0047] As a preferred example of this utility model, the elastic structure 15 can deform synchronously with the deformation of the retaining wall 1, providing continuous support for the sealing layer 14, ensuring that the sealing layer 14 always fits the frame, avoiding gaps caused by deformation, and maintaining the sealing effect; at the same time, it buffers the stress of deformation on the sealing layer 14, reduces the aging and cracking of the sealing layer 14, extends its service life, enhances the integrity of the sealing layer 14 and the frame, and solves the problem that the traditional sealing layer 14 is prone to failure due to deformation.

[0048] In the example of this application, the water-blocking part 3 is tightly fitted to both ends of the expansion joint 2, and the space between the water-blocking part 3 and the expansion joint 2 is filled with epoxy resin adhesive.

[0049] As a preferred example of this utility model, by ensuring a tight fit between the water-retaining part 3 and both ends of the expansion joint 2, the water inlet channel of the expansion joint 2 can be initially sealed at the physical structural level, preventing external water from directly entering the interior of the expansion joint 2. The filling with epoxy resin adhesive utilizes its excellent adhesion, sealing properties, and water resistance. On the one hand, it further fills the tiny gaps between the water-retaining part 3 and the expansion joint 2, eliminating potential paths for water seepage. On the other hand, after curing, the epoxy resin adhesive forms a stable and durable sealing layer 14, which can resist water erosion for a long time, improving the overall waterproofing capability of the expansion joint 2. This effectively reduces the risk of structural damage to the retaining wall 1 caused by water seepage from the expansion joint 2, affecting the stability and durability of road facilities, and ensuring the structural reliability of the municipal road retaining wall 1 in complex water environments.

[0050] Epoxy resin adhesives are existing technology and will not be discussed further here.

[0051] In the example of this application, the water-blocking part 3 is provided with a reinforcing frame 16, which has a wavy concave-convex structure.

[0052] As a preferred example of this utility model, a corrugated reinforcing frame 16 with a wavy, concave-convex structure is provided in the water-retaining section 3. The wavy, concave-convex shape increases the contact area between the reinforcing frame 16 and the water-retaining section 3, improving the bonding strength between the two. This allows the reinforcing frame 16 to more efficiently disperse and transmit external forces, enhancing the overall structural strength and rigidity of the water-retaining section 3. When the retaining wall 1 deforms due to temperature changes, foundation settlement, etc., the water-retaining section 3 will also experience stress due to the influence of the expansion joint 2. The reinforcing frame 16 can effectively resist and buffer these stresses through its own structural deformation and mechanical properties, preventing cracking and damage to the water-retaining section 3, maintaining the integrity and waterproof function of the water-retaining section 3, and thus ensuring the long-term stable operation of the waterproof structure of the expansion joint 2. This improves the deformation resistance and service life of the waterproof system of the expansion joint 2 of the municipal road retaining wall 1.

[0053] In the example of this application, the distance between the plates 9 of the first baffle 8 and the second baffle 10 is less than the diameter of the water pipe 11.

[0054] As a preferred example of this utility model, the interval design can provide lateral restraint for the water pipe 11. When the retaining wall 1 of the municipal road deforms due to temperature changes, the plates 9 of the first baffle 8 and the second baffle 10 can limit the lateral movement range of the water pipe 11 through a small interval, so as to prevent the water pipe 11 from shifting, tilting or even falling off under the impact of water flow or structural expansion and contraction, and ensure that the water pipe 11 is always in the preset drainage position, continuously and stably collecting and discharging the groundwater behind the deformation joint 2.

[0055] It can effectively prevent gravel, large pieces of mud and sand, and other impurities from entering the space between the water pipe 11 and the baffle, avoiding impurities from directly covering the through holes of the water pipe 11 or entering the pipe and causing blockage. At the same time, the smaller gap can also reduce the accumulation of impurities in the gap between the baffle and the water pipe 11, reduce the probability of the through holes of the water pipe 11 being blocked, ensure that the water pipe 11 maintains a smooth drainage channel for a long time, and ensure that the drainage function works stably.

[0056] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A waterproof structure for expansion joints of retaining walls in municipal roads, characterized in that... ,include: A retaining wall (1) is formed by clamping two sides of the retaining wall (1) to form a deformation joint (2). One end of the deformation joint (2) is provided with a water-blocking part (3) and the other end is provided with a drainage device (4). The drainage device (4) includes a main frame (5), the outer wall of the main frame (5) is fitted to both ends of the expansion joint (2), the main frame (5) is provided with a first baffle (8) on the side near the water-blocking part (3), the main frame (5) is provided with a second baffle (10) at a position away from the first baffle (8), a water pipe (11) is provided between the first baffle (8) and the second baffle (10), and a sealing layer (14) is provided on the side of the second baffle (10) away from the water pipe (11).

2. The waterproof structure for expansion joints of retaining walls in municipal roads according to claim 1, characterized in that, The main frame (5) includes a first frame (6) and a second frame (7). The first frame (6) and the second frame (7) are arranged opposite to each other and do not contact each other. The contact surface between the main frame (5) and the expansion joint (2) and the sealing layer (14) is set in a sawtooth shape.

3. A waterproof structure for expansion joints of retaining walls in municipal roads according to claim 1, characterized in that, The first baffle (8) and the second baffle (10) are each divided into two plates (9), which are respectively disposed inside the first frame (6) and the second frame (7), and are spaced apart from each other.

4. A waterproof structure for expansion joints of retaining walls in municipal roads according to claim 1, characterized in that, The first baffle (8) has a filter layer (12) installed on the side near the water pipe (11).

5. A waterproof structure for expansion joints of retaining walls in municipal roads according to claim 1, characterized in that, The water pipe (11) has a hollow structure, and water holes are evenly arranged on the wall of the water pipe (11).

6. A waterproof structure for expansion joints of retaining walls in municipal roads according to claim 1, characterized in that, The water pipe (11) is provided with pipe caps (13) at both ends. The pipe caps (13) are detachably connected to the water pipe (11). Water holes are provided on the pipe caps (13).

7. A waterproof structure for expansion joints of retaining walls in municipal roads according to claim 1, characterized in that, The sealing layer (14) is provided with several elastic structures (15), and the two ends of the elastic structures (15) are fixedly connected to the first frame (6) and the second frame (7) respectively.

8. A waterproof structure for expansion joints of retaining walls in municipal roads according to claim 1, characterized in that, The water-blocking part (3) is tightly fitted to both ends of the expansion joint (2), and the space between the water-blocking part (3) and the expansion joint (2) is filled with epoxy resin adhesive.

9. A waterproof structure for expansion joints of retaining walls in municipal roads according to claim 1, characterized in that, The water-blocking part (3) is provided with a reinforcing frame (16), which has a wave-shaped concave-convex structure.

10. A waterproof structure for expansion joints of retaining walls in municipal roads according to claim 1, characterized in that, The distance between the plates (9) of the first baffle (8) and the second baffle (10) is smaller than the diameter of the water pipe (11).

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