Elastomer for a waterproofing sealant for construction joints

Abstract

The utility model belongs to the field of building construction technology, concretely relates to a kind of for construction joint waterproof sealing device elastomer, including a kind of for construction joint waterproof sealing device elastomer, including elastomer and positioning assembly, wherein, the positioning assembly includes anchor plate, gasket and base, U-shaped groove is formed in the base, the gasket and the anchor plate are sequentially embedded in the U-shaped groove;First fastener sequentially passes through the anchor plate, gasket and base, to be able to with this positioning assembly fixed locking to matrix;The elastomer is embedded in the U-shaped groove, and is connected to the anchor plate by second fastener. Thus, the structure and material of construction joint can be optimized and designed in early stage, thereby solving the problem of seepage water, reducing the cost of later operation plugging, and eliminating safety hazards.

Description

Technical Field

[0001] This utility model belongs to the field of building construction technology, and specifically relates to an elastic body for a waterproof sealing device for construction joints. Background Technology

[0002] Statistical analysis shows that the current methods of joint waterproofing have remained largely unchanged for decades since the introduction of foreign technology, still relying on traditional design measures. However, on-site construction is complex and presents numerous challenges; therefore, providing stable and reliable joint waterproofing designs is urgently needed.

[0003] Current status of main and auxiliary construction joints: The current waterproofing structure is a combination of water-swellable sealing strips, grouting pipes, and drainage boxes. The application of construction joints in subway projects is currently characterized by a high leakage rate at construction joints (86%). Analysis of the causes of leakage at main and auxiliary construction joints reveals the following:

[0004] 1. In some cases, waterstops could not be pre-embedded during the pouring process, resulting in a lack of proactive waterproofing measures at the joints. The water-swellable waterstops installed in advance expanded during the pouring of concrete. In addition, the unevenness of the base surface and the numerous gaps during the initial roughening of the concrete prevented good adhesion between the waterstops and the concrete, which would lead to water leakage later on.

[0005] 2. Uneven settlement and stretching: After the concrete is poured, the construction joint will experience settlement and stretching deformation due to structural settlement and temperature changes. After grouting and sealing, cracks will reappear, resulting in re-leakage.

[0006] Water leakage is a common phenomenon in underground engineering, especially in subway projects. Because waterproofing of the main structure and auxiliary structures is often impossible with pre-installed waterstops, recurring leakage remains a difficult problem to solve. Leaks not only pose a threat to structural safety and quality but also negatively impact public safety and cause significant economic losses for future operations. Therefore, research on waterproofing of key joints in subway projects is crucial.

[0007] Therefore, it is necessary to optimize and improve the current waterproofing structure. This can be achieved through optimized design of the construction joint structure and materials in the early stages, thereby solving the leakage problem, reducing the cost of subsequent leak sealing, and eliminating safety hazards. Utility Model Content

[0008] The purpose of this invention is to provide an elastomer for a waterproof sealing device for construction joints, which can solve the problem of water leakage by optimizing the structure and materials of the construction joint in the early stage, thereby reducing the cost of subsequent operation and leak sealing, and eliminating safety hazards.

[0009] To achieve the above objectives, this utility model provides an elastomer for a construction joint waterproof sealing device, which is installed on a positioning component, which is installed on a base. The elastomer includes an integrally formed pressing section and an extension section. The pressing section is embedded in the U-shaped groove of the positioning component and connected to the positioning component. The extension section protrudes from the U-shaped groove and has an included angle with respect to the pressing section.

[0010] In one possible design, the included angle α between the extension section and the pressing section is 75° to 105°.

[0011] In one possible design, the extension is formed in an L-shape, a straight line, or a T-shape.

[0012] In one possible design, the elastomer includes a pressure section embedded in a U-shaped groove, the pressure section having a buffer hole, the axis of the buffer hole being parallel to the length direction of the positioning component, and the buffer hole extending along the length direction of the positioning component and penetrating the pressure section.

[0013] In one possible design, the buffer holes are configured in multiple groups and are evenly spaced along the width direction of the positioning component.

[0014] In one possible design, the buffer hole is a circular hole.

[0015] In one possible design, the elastomer is configured as a polyurethane elastomer.

[0016] Through the above technical solution, the elastomer of this construction joint waterproofing sealing device can rely on existing structures, thereby providing excellent waterproofing performance, and is particularly suitable for rigid substrates such as concrete structures. Its core components include the elastomer and a positioning component, wherein the positioning component consists of an anchor plate, a gasket, and a base. Through material selection and optimized structural design, the device can be effectively embedded into the existing main structure, achieving a long-lasting and reliable waterproofing effect. This elastomer for construction joint waterproofing sealing is particularly suitable for use in rigid substrates such as concrete structures, such as in infrastructure construction like tunnels, bridges, and dams. Through precise design and high-quality material selection, it can effectively prevent water penetration, protect the internal structure from erosion, and thus extend the service life of the building. The entire installation process is simple and straightforward, requiring no complex tools or techniques; on-site operators can complete a high-quality installation after brief training. This device can maintain stable waterproofing performance in various harsh environments, providing lasting safety assurance for engineering projects. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a waterproof sealing device for construction joints provided by this utility model in one embodiment;

[0019] Figure 2 This is a schematic diagram of the structure of a waterproof sealing device for construction joints provided by this utility model in one embodiment, wherein the elastomer has been removed;

[0020] Figure 3 yes Figure 2 A magnified structural diagram of part A in the middle;

[0021] Figure 4 This is a schematic diagram of the construction joint waterproof sealing device provided by the present invention in another embodiment, wherein the elastomer is provided with buffer holes.

[0022] In the above figures: 1-elastic body, 10-buffer hole, 11-pressure section, 12-extension section, 2-positioning component, 21-anchor plate, 22-gasket, 23-base, 3-first fastener, 4-second fastener, 5-pressure plate, 6-base. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that while the description of these embodiments is intended to aid in understanding the present invention, it does not constitute a limitation thereof. The specific structural and functional details disclosed herein are only for describing exemplary embodiments of the present invention. However, the present invention may be embodied in many alternative forms and should not be construed as being limited to the embodiments described herein.

[0024] According to a specific embodiment of the present invention, an elastomer for a construction joint waterproof sealing device is provided, wherein a locking ring adapted to the hook is provided on the rear compartment of the vehicle. Figures 1 to 3 One specific embodiment is shown.

[0025] See Figures 1 to 3As shown, the elastomer used for waterproof sealing of construction joints includes an elastomer 1 and a positioning component 2. The positioning component 2 includes an anchor plate 21, a gasket 22, and a base 23. A U-shaped groove is formed in the base 23. The gasket 22 and the anchor plate 21 are sequentially embedded in the U-shaped groove. A first fastener 3 passes through the anchor plate 21, the gasket 22, and the base 23 in sequence to fix and lock the positioning component 2 to the base 6. The elastomer 1 is embedded in the U-shaped groove and is connected to the anchor plate 21 by a second fastener 4.

[0026] The base 23 is the supporting structure of the entire device, with a U-shaped groove inside to accommodate the anchor plate 21, the gasket 22, and the elastomer 1. As a key component connecting the base 23 and the elastomer 1, the anchor plate 21 provides a stable foundation; it is made of high-strength metal to ensure good mechanical performance even in harsh environments. The gasket 22 is located between the anchor plate 21 and the base 23, serving a cushioning and adjustment function.

[0027] Determine a suitable installation location (installation groove) on the concrete substrate 6, and perform necessary cleaning and leveling to ensure the installation surface is clean, dust-free, and relatively flat. Place the gasket 22 and anchor plate 21 sequentially into the U-shaped groove of the base 23, ensuring all components fit tightly and are correctly positioned. Use a first fastener 3 (such as an expansion bolt) to securely fix the positioning assembly 2 to the substrate 6 by sequentially passing it through the anchor plate 21, gasket 22, and base 23. Embed the pre-prepared elastomer 1 into the U-shaped groove of the base 23, completely covering the anchor plate 21 and gasket 22. Use a second fastener 4 (such as a screw) to fix the elastomer 1 to the anchor plate 21, ensuring it will not shift or fall off during subsequent operations. After installation, carefully check all connections for tightness and for any damage or wrinkles to the elastomer 1, ensuring the device is in optimal working condition.

[0028] Through the above technical solution, the elastomer of the construction joint waterproofing sealing device can rely on the existing structure, thereby providing excellent waterproofing performance, and is particularly suitable for hard substrates such as concrete structures. Its core components include the elastomer 1 and the positioning component 2, wherein the positioning component 2 consists of an anchor plate 21, a gasket 22, and a base 23. Through material selection and optimized structural design, the device can be effectively embedded into the existing main structure, achieving a long-lasting and reliable waterproofing effect. This elastomer for construction joint waterproofing sealing is particularly suitable for use in hard substrates such as concrete structures, such as tunnels, bridges, dams, and other infrastructure construction. Furthermore, the overall structure of this construction joint waterproofing sealing device is simple, easy to install and maintain, and can effectively reduce construction costs. Through precise design and high-quality material selection, it can effectively prevent water penetration, protect the internal structure from erosion, and thus extend the service life of the building. The entire installation process is simple and straightforward, requiring no complex tools or techniques; on-site operators can complete high-quality installation after brief training. This device can maintain stable waterproofing performance in various harsh environments, providing lasting safety assurance for engineering projects.

[0029] Specifically, the gasket 22 can be made of rubber or composite material, which has a certain degree of elasticity and corrosion resistance. It can absorb the stress caused by uneven surfaces during installation, while preventing fasteners from directly contacting the base 6 and reducing wear.

[0030] The base 23 is typically made of a sturdy and durable metal material to ensure that it can withstand external pressure without deforming.

[0031] In one embodiment provided in this disclosure, the elastomer 1 includes an integrally formed pressure-bearing section 11 and an extension section 12. The pressure-bearing section 11 is embedded in the U-shaped groove and connected to the anchor plate 21. This embedded design effectively prevents the intrusion of moisture and other impurities, enhancing the overall sealing performance of the device. The pressure-bearing section 11 is securely connected to the anchor plate 21 by a second fastener 4 (such as a screw or clip), ensuring that it will not shift or fall off during long-term use. This connection method not only improves the stability of the device but also facilitates subsequent maintenance and replacement.

[0032] The extension section 12 protrudes from the U-shaped groove, forming a raised portion that increases the contact area with the surrounding structure. This design allows the elastomer 1 to more effectively cover potential seepage paths, further improving waterproofing performance. The extension section 12 has an angle relative to the pressure-bearing section 11, allowing the elastomer 1 to achieve better fit on surfaces of different angles and shapes, adapting to various complex installation environments. Simultaneously, the angled design helps to distribute pressure evenly across the entire extension section 12, enabling the elastomer 1 to fit more tightly against the surrounding structure, reducing gaps and potential leakage points.

[0033] The compression section 11 and the extension section 12 are integrally molded, which not only avoids the seam and connection problems that may occur in the traditional segmented manufacturing process, reducing the complexity and cost in the production process, but also makes the connection between the various parts of the elastomer 1 more solid, reducing the risk of seal failure caused by loosening or falling off of parts.

[0034] Specifically, the included angle α between the extension section 12 and the pressure-retaining section 11 is 75°~105°. This angle design helps to distribute pressure evenly across the entire extension section 12, allowing the elastomer 1 to fit more tightly against the surrounding structure, reducing gaps and potential leakage points. Specifically: a 75° angle is suitable for narrower or curved surfaces, providing better flexibility and adaptability, ensuring the elastomer 1 fits tightly against complex shapes. A 90° angle is the most commonly used intermediate value, suitable for most standard installation environments, providing even pressure distribution and stable sealing performance. A 105° angle is suitable for wider or flatter surfaces, increasing the effective contact area of ​​the extension section 12 and further enhancing the sealing effect. Thus, the angle design not only improves functionality but also enhances the overall aesthetics of the device, making it more visually harmonious and unified.

[0035] In one embodiment provided in this disclosure, the elastomer for the construction joint waterproof sealing device further includes a pressure plate 5, which is formed to fit the angle between the extension section and the pressure section 11. The pressure plate 5 abuts against the extension section and the pressure section 11 respectively. The second fastener 4 passes through the pressure plate 5, the pressure section 11 and the anchor plate 21 to lock it onto the base 23.

[0036] The design of the pressure plate 5 ensures a tighter connection between the various parts of the elastomer 1, reducing the risk of seal failure due to loosening or detachment of components. The additional pressure provided by the pressure plate 5 ensures that the elastomer 1 maintains good sealing performance even under stress. In addition, the fitting shape between the pressure plate 5 and the extension section and the pressure-receiving section 11 helps to distribute the pressure evenly across the entire elastomer 1, avoiding localized stress concentration and extending its service life.

[0037] Furthermore, the extended sections are formed in an L-shape, a straight line, or a T-shape.

[0038] The L-shaped extension consists of a vertical section and a horizontal section, forming a 90-degree angle structure that allows the extension to provide support and sealing in both directions. The L-shape design increases the contact area with the surrounding structure, ensuring a tighter fit and enhanced sealing, making it particularly suitable for corners or other areas requiring sealing on two different planes. It effectively prevents moisture from seeping in from corners, protecting the structure from dampness.

[0039] The straight extension section extends in a single direction, evenly distributing external pressure along the entire line, avoiding localized stress concentration and extending service life. It is ideal for straight construction joints, such as tunnel walls and bridge decks. It provides a continuous and uniform seal, ensuring no leakage. Due to its linear structure, the installation process is relatively simple, requiring no complex adjustments, saving time and costs.

[0040] The T-shaped extension consists of a main section and a transverse branch, forming a T-shaped structure that provides support and sealing in three directions, enhancing overall stability. It allows the extension to contact multiple surfaces, ensuring a wider sealing coverage and improving sealing performance. This extension is particularly suitable for complex construction joints, such as intersections or where multiple planes meet. It effectively prevents moisture from seeping into these complex areas, protecting the safety and integrity of the structure.

[0041] In one embodiment provided in this disclosure, the elastic body 1 includes a pressure section 11 embedded in a U-shaped groove, the pressure section 11 is provided with a buffer hole 10, the axial direction of the buffer hole 10 is parallel to the length direction of the base 23, and the buffer hole 10 extends along the length direction of the base 23 and penetrates the pressure section 11.

[0042] The axial direction of the buffer hole 10 is parallel to the length direction of the base 23, ensuring that it can evenly distribute pressure under stress and reduce local stress concentration. The buffer hole 10 extends along the length direction of the base 23 and passes through the pressure-resistant section 11, forming a continuous channel. This design helps to mitigate the impact of external pressure on the elastomer 1, especially under complex geological conditions, effectively absorbing vibration and impact and extending service life.

[0043] Therefore, based on the design of the buffer hole 10, the elastomer 1 can absorb energy through the flow of air or liquid within the hole when subjected to external pressure or impact, reducing the pressure transmitted to the elastomer 1 itself. This allows the external pressure to be evenly distributed on the pressure-bearing section 11, avoiding localized stress concentration and thus extending the service life of the elastomer 1. Furthermore, the buffer hole 10 also provides a certain amount of expansion and contraction space during temperature changes, ensuring that the elastomer 1 is not damaged due to thermal expansion and contraction.

[0044] The elastomer used in the construction joint waterproof sealing device is suitable for hard substrates 6 such as concrete structures, in infrastructure construction such as tunnels, bridges, and dams. In different installation environments, the buffer holes 10 can help the elastomer 1 better adapt to uneven surfaces or minor deformations. For example, on hard substrates 6 such as concrete structures, the buffer holes 10 can absorb the minor unevenness of the substrate 6 surface, ensuring that the elastomer 1 always fits tightly and improving the sealing effect.

[0045] In one embodiment provided in this disclosure, the buffer holes 10 are configured in multiple sets and are evenly spaced along the width direction of the base 23. This arrangement ensures that the entire pressure-bearing section 11 receives uniform support under stress, preventing deformation or damage caused by uneven local stress. When subjected to external pressure or impact, the elastomer 1 can absorb energy through the flow of air or liquid within the multiple holes, reducing the pressure transmitted to the elastomer 1 itself, thereby improving durability and protecting the surrounding structure from damage to some extent. The buffer holes 10, evenly spaced along the width direction of the base 23, help to evenly distribute external pressure on the pressure-bearing section 11, avoiding local stress concentration and thus extending the service life of the elastomer 1. Furthermore, the multiple sets of buffer holes 10 can provide more expansion and contraction space during temperature changes, ensuring that the elastomer 1 is not damaged by thermal expansion and contraction.

[0046] In one embodiment provided in this disclosure, the buffer hole 10 is a circular hole. The circular hole design allows each buffer hole 10 to provide a uniform pressure dispersion effect, avoiding stress concentration and improving the durability of the polyurethane elastomer. Simultaneously, because the edges of the circular hole are relatively smooth, the risk of tearing under stress is reduced, extending the service life of the polyurethane elastomer. When external pressure is applied to the polyurethane elastomer, the circular hole can disperse the pressure to a wider area through its internal space, avoiding localized stress concentration. When the elastomer 1 is subjected to vibration or impact, it absorbs energy through the flow of air or liquid within the holes, reducing the pressure transmitted to the elastomer 1 body.

[0047] The spacing of the round holes along the width of the base 23 should be adjusted according to the specific installation conditions and expected stress conditions to ensure that each round hole can play an effective role, while avoiding structural weakening due to excessive density.

[0048] Specifically, the elastomer 1 is configured as a polyurethane elastomer. Based on the properties of rubber materials, the polyurethane elastomer possesses excellent elasticity and resilience, enabling it to quickly return to its original shape after being subjected to stress, ensuring a stable sealing effect during long-term use. Simultaneously, based on the good weather resistance of rubber materials, it can maintain stable physical properties under various climatic conditions, making it suitable for outdoor or harsh environments.

[0049] Specifically, the base 23 and the anchor plate 21 are made of metal alloy, giving them high strength and excellent mechanical properties, enabling them to withstand significant external pressure and impact, and ensuring the long-term stability of the device. Both the base 23 and the anchor plate 21 are coated with an anti-corrosion layer, typically using materials such as zinc plating, chromium plating, or nickel plating. These materials have good corrosion resistance and oxidation resistance, providing effective protection against long-term exposure to humid or corrosive environments.

[0050] It should be noted that in this disclosure, the pressure plate 5 is also made of metal material and is galvanized to improve its corrosion resistance, prevent surface oxidation and corrosion, increase its surface hardness, enhance its wear resistance, and extend its service life.

[0051] According to a second aspect of this disclosure, a waterproof sealing construction method is provided.

[0052] In the embodiments provided in this disclosure, the waterproof sealing construction method employs an elastomer for a construction joint waterproof sealing device as described in the first aspect; the waterproof sealing construction method includes the following steps. First, ensure that all components (polyurethane elastomer, base 23, anchor plate 21, pressure plate 5, fasteners, etc.) and tools (drilling equipment, fastening tools, curing agent, etc.) are prepared. The concrete structure or other hard substrate 6 on which the elastomer for the construction joint waterproof sealing device needs to be installed is cleaned and leveled to ensure that the installation surface is clean, dust-free, and relatively flat.

[0053] Based on design requirements and actual needs, determine the specific dimensions of the mounting groove to ensure that all components fit tightly during subsequent installation. Create the mounting groove on the base 6 according to the set dimensions. When creating the groove, use appropriate tools (such as an electric drill or cutting machine) to precisely create the mounting groove on the base 6 according to the set dimensions. The depth and width of the mounting groove should match the base 23 and the anchor plate 21 to ensure they can be securely embedded.

[0054] The positioning component 2 is installed into the mounting groove using the first fastener 3. Specifically, the gasket 22 and the anchor plate 21 are sequentially embedded into the U-shaped groove of the base 23, and the positioning component 2 is fixed and locked into the mounting groove on the base 6 by passing the first fastener 3 (such as a bolt) through the anchor plate 21, gasket 22, and base 23 in sequence. Ensure that all components fit tightly to avoid loosening. Use the first fastener 3 to firmly install the positioning component 2 onto the base 6, ensuring its position is accurate. At this time, preliminary adjustments can be made to ensure that the positioning component 2 is completely in contact with the surface of the base 6.

[0055] Fill the gap between the positioning component 2 and the mounting groove with a binder, such as a suitable binder (e.g., epoxy resin, cement mortar), ensuring good adhesion and durability. Evenly fill the gap between the positioning component 2 and the mounting groove with the binder, ensuring every corner is fully filled. The binder further enhances the bond between the positioning component 2 and the substrate 6, preventing moisture penetration. Use a tool to smooth out any excess binder, ensuring a smooth, bubble-free surface to improve the sealing effect.

[0056] After the coagulant solidifies and forms, the elastomer 1 is assembled onto the positioning component 2 to ensure that the polyurethane elastomer is tightly embedded in the U-shaped groove of the base 23 and correctly connected to the anchor plate 21.

[0057] A pressure plate 5 is attached to the elastomer 1, and the pressure plate 5 and the elastomer 1 are fastened to the positioning assembly 2 using a second fastener 4. The pressure plate 5 is placed on the polyurethane elastomer, ensuring its shape matches the angle between the extension section and the pressing section 11, and abuts against the extension section and the pressing section 11 respectively. The second fastener 4 (such as a screw or clip) is passed through the pressure plate 5, the pressing section 11, and the anchor plate 21 to firmly fasten the pressure plate 5 and the polyurethane elastomer to the positioning assembly 2. Ensure that the fasteners apply pressure evenly, so that the entire device fits tightly without any gaps.

[0058] After the operation is completed, check that all connections are secure to ensure there are no loose or missing parts. Perform a seal test on the completed elastomer used for the construction joint waterproofing sealant to confirm that it does not leak under pressure. Clean up the construction site, removing excess materials and tools to ensure the site is clean and orderly.

[0059] Through the above technical solution, by setting dimensions and precise slotting, it is ensured that the positioning component 2 and the elastomer 1 can fit tightly against the substrate 6, providing a reliable sealing effect. The dual fixing method using the first fastener 3 and a coagulant enhances the bonding force between the positioning component 2 and the substrate 6, ensuring long-term stability. The pressure plate 5 and the second fastener 4 are used to firmly fix the elastomer 1, ensuring that the entire device will not shift or fall off under stress, improving sealing reliability. This waterproof sealing construction method uses the elastomer for construction joint waterproof sealing devices as described in the first aspect, and ensures efficient and reliable installation through a series of detailed steps. This not only simplifies the construction process but also significantly improves the overall performance of the elastomer used in construction joint waterproof sealing devices, especially excelling in applications on hard substrates 6 such as concrete structures. Through the carefully designed multi-group circular hole buffer structure, high-performance rubber materials, and the selection of the metal alloy base 23 and anchor plate 21, the device can better adapt to complex and changing installation environments, providing a more reliable sealing effect.

[0060] In one embodiment, the operator first uses a level to align the line, and then cuts a groove in the part of the elastic body for the construction joint waterproof sealing device to be installed. The groove size is (4×8) cm, and this groove is the installation groove.

[0061] The U-shaped channel gasket 22 and base 23 are installed into the pre-cut installation channel using an anchoring construction process, then leveled and fixed with expansion bolts. High-strength quick-setting mortar is then used to fill and compact the gap between the installation channel and the U-shaped channel, while waiting for the quick-setting mortar to be applied.

[0062] After the quick-setting ash reaches its strength, place the polyurethane high elastic body into the groove, and then drill holes according to the pre-reserved tapping holes of the base 23. Position the L-shaped pressure plate 5 and then drill holes. After drilling, screws (second fastener 4) are installed. Do not tighten the first anchoring. After the entire closed loop is anchored, anchor and tighten it from one end of the elastic body 1. This anchoring presses the material to the same level as the mold to ensure that the material is pressed tightly. Then check the entire closed loop for any loose parts.

[0063] After completing one loop, cut off the excess material, use professional polyurethane adhesive to bond the cut new surfaces, wrap the bonded areas with butyl tape, and finally apply butyl tape to both the top and bottom of the entire loop of material and press it firmly.

[0064] Finally, it should be noted that this utility model is not limited to the above-described optional embodiments, and anyone can derive other various forms of products under the guidance of this utility model. The above specific embodiments should not be construed as limiting the scope of protection of this utility model, which should be determined by the claims, and the description can be used to interpret the claims.

Claims

1. An elastomer for a construction joint waterproof sealing device, for mounting on a positioning assembly, the positioning assembly being mounted on a substrate, characterized in that, The elastomer includes an integrally formed pressing section and an extension section. The pressing section is embedded in the U-shaped groove of the positioning component and connected to the positioning component. The extension section protrudes from the U-shaped groove and has an included angle with respect to the pressing section.

2. The elastic body for a waterproof sealing device for construction joints according to claim 1, characterized in that, The included angle α between the extension section and the pressing section is 75°~105°.

3. The elastomer for a waterproof sealing device for construction joints according to claim 1, characterized in that, The extension segment is formed in an L-shape, a straight line, or a T-shape.

4. The elastomer for a waterproof sealing device for construction joints according to claim 1, characterized in that, The elastomer includes a pressure section embedded in a U-shaped groove, and the pressure section is provided with a buffer hole. The axial direction of the buffer hole is parallel to the length direction of the positioning component, and the buffer hole extends along the length direction of the positioning component and passes through the pressure section.

5. An elastomer for a waterproof sealing device for construction joints according to claim 4, characterized in that, The buffer holes are configured in multiple groups and are evenly spaced along the width direction of the positioning component.

6. An elastomer for a waterproof sealing device for construction joints according to claim 4, characterized in that, The buffer hole is a circular hole.

7. An elastomer for a construction joint waterproof sealing device according to any one of claims 1 to 6, characterized in that, The elastomer is configured as a polyurethane elastomer.

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