Water stop device with shock absorption function for expansion joint

Abstract

The utility model discloses a water stop device with a shock absorption function for an expansion joint, and relates to the technical field of civil engineering structure sealing, the device comprises a central water stop main body with specific geometrical characteristics, elastic buffer connecting assemblies symmetrically distributed on the two sides of the main body and end constraint parts, and all the components form a graded energy consumption system through mechanical transmission paths. According to the water stop device, the structural design is optimized, and the shock absorption and buffering functions of the water stop device are enhanced, so that surface sinking caused by vibration and loads is avoided, a sunken area is prevented from being generated, impurity accumulation is effectively reduced, the smoothness of a road and the driving comfort are kept, the service life of the water stop device is prolonged, and the safety of the road is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to civil engineering structure sealing technical field, concretely relates to a kind of shock-absorbing type waterstop suitable for road, bridge and tunnel engineering expansion joint, especially it is related to the composite waterstop of vibration energy absorption and stress uniform distribution by hierarchical energy dissipation structure. BACKGROUND

[0002] In the construction of road, bridge and tunnel and other infrastructure, the design of expansion joint is crucial, and it is used to adapt to the structural deformation caused by temperature changes, traffic loads and other environmental factors, and to maintain the integrity of the structure. In order to prevent water, silt and other impurities from penetrating into the structure through the expansion joint, waterstop devices are widely used in expansion joints. Rubber waterstop devices are widely used in expansion joints due to their good elasticity, water resistance and sealing performance. However, the existing rubber waterstop devices mostly focus on the water sealing function in design, and lack the ability to absorb vibration and impact, which causes many problems in long-term use.

[0003] The existing rubber waterstop device cannot consider the absorption function of vibration and impact due to the simplicity of its structural design. Road, bridge and tunnel and other infrastructure are subjected to dynamic effects from traffic loads, earthquakes and environmental changes for a long time. The vibration and impact caused by these factors not only affect the road itself, but also put a great burden on the waterstop device. The existing rubber waterstop device simply relies on the elastic deformation of rubber material to cope with the opening and closing of expansion joint without optimizing some shock-absorbing structure. However, this structure cannot effectively absorb the impact force caused by road vibration or vehicle load, which easily leads to excessive compression or uneven deformation of the waterstop device, causing its surface to gradually sink and form a concave area. Therefore, the concave and silt problems on the surface of the waterstop device directly affect the flatness and driving comfort of the road, and even in the case of water accumulation, it increases the risk of road skidding and reduces driving safety.

[0004] In addition, due to the inability of the existing rubber waterstop device to effectively alleviate the impact of long-term vibration and impact, the generation of concave area makes silt and gravel a long-term problem, which not only increases the difficulty of road maintenance, but also increases the probability of road accidents. Therefore, the existing rubber waterstop device not only gradually declines in sealing performance, but also may shorten the service life of the road and cause safety hazards.

[0005] Therefore, in view of the problem of surface sinking to form a concave area after long-term use of the existing rubber waterstop device, it is particularly important to develop a rubber waterstop device with shock-absorbing and buffering functions. SUMMARY

[0006] The purpose of the present application is to at least overcome one of the deficiencies of the prior art, provide a water stop device for expansion joint with shock absorption, which enhances the shock absorption and buffering function of the water stop device through optimized structure design, thereby avoiding surface subsidence caused by vibration and load, preventing the formation of recessed areas, effectively reducing the accumulation of debris, maintaining the flatness of the road and the comfort of driving, prolonging the service life of the water stop device, and improving the safety of the road.

[0007] To achieve the above purpose, the present application discloses a water stop device for expansion joint with shock absorption, which comprises a central water stop body with specific geometric characteristics, elastic buffer connecting components symmetrically distributed on both sides of the central water stop body, and end constraint parts, and a hierarchical energy dissipation system is formed between each component through a mechanical transmission path.

[0008] The central water stop body is in a hollow funnel-like shape, with a larger width at the upper and lower edges, gradually narrowing to form a narrow section in the middle region; the cross-sectional width reaches a maximum value at the upper and lower anchoring ends, and gradually narrows to form a tapered narrow section along the axial direction to the middle region, and this morphological feature allows the body to produce a predetermined bidirectional bending deformation when subjected to axial pressure, while the gradient change of the cross-sectional moment of inertia guides the stress to be evenly distributed along the body axis.

[0009] Further, continuous corrugated reinforcing ribs are provided on the surface of the narrow section to improve longitudinal compressive stiffness while retaining transverse deformation capability, achieving dynamic balance of load transmission and energy dissipation.

[0010] The elastic buffer connecting components are arranged on both sides of the central water stop body and consist of a straight section, a first deformation section and a second deformation section to form a continuous variable cross-section structure.

[0011] The straight section extends outward from the narrow section of the central water stop body, and the first deformation section forms a right circular arc bend with the straight section, and the first deformation section ensures that low-frequency vibration energy is absorbed through elastic buckling in the initial deformation stage.

[0012] The second deformation section connects the end of the first deformation section and presents a tapered hook shape, with a cross-sectional thickness decreasing exponentially along the length direction, forming a stiffness decreasing gradient, so that this section triggers a multi-stage plastic hinge mechanism in sequence when subjected to impact load, achieving stepwise attenuation of high-frequency vibration energy through material extension deformation.

[0013] The end constraint part is arranged at the end of the second deformation section and has a semicircular cross-section inlay block structure, and the outer contour of the inlay block structure forms an interference fit with the pre-buried channel of the expansion joint edge beam.

[0014] The water stop device with shock absorption for expansion joint provided by the application not only has the basic water stopping function of the traditional water stop device, but also has excellent shock absorption capacity, can effectively disperse and absorb the energy of vibration and external load, improve the stability of the expansion joint, prolong the service life of the expansion joint, and has high technical value and application prospect.

[0015] The above-listed benefits are not exhaustive of all advantages. Other potential benefits and detailed technical implementations will be further disclosed in the examples or other description sections of the application. BRIEF DESCRIPTION OF DRAWINGS

[0016] Aspects of the present disclosure will become more fully understood from the detailed description and accompanying drawings, in which the structures of the respective structures shown in the drawings are sometimes shown with exaggerated positions, sizes and ranges, etc. In the drawings:

[0017] Figure 1 is a cross-sectional structural schematic diagram of an embodiment of the present application.

[0018] The respective reference numerals in the drawings are as follows:

[0019] 1 - central water stopping main body, 2 - elastic buffer connecting assembly, 2a - straight section, 2b - first deformation section, 2c - second deformation section, 3 - end constraint part. DETAILED DESCRIPTION

[0020] The present disclosure will be described below with reference to the accompanying drawings, which show several embodiments of the present disclosure. It should be understood, however, that the present disclosure can be presented in various different ways, and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure of the present disclosure more complete, and to fully inform those skilled in the art of the scope of protection of the present disclosure. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments.

[0021] It should be understood that in all the drawings, the same reference numerals represent the same elements. In the drawings, the sizes of some features can be distorted for the sake of clarity.

[0022] It should be understood that the language used in the specification is only used to describe specific embodiments, and is not intended to limit the present disclosure. Unless otherwise defined, all terms (including technical terms and scientific terms) used in the specification have meanings commonly understood by those skilled in the art. For the sake of brevity and / or clarity, techniques, methods and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the authorized specification when appropriate.

[0023] As used in the specification, the singular forms "a," "an" and "the" include plural referents unless the context clearly dictates otherwise. As used in the specification, the terms "comprises," "comprising," "includes," "including" and "contains" or variations thereof will be understood to mean that the named steps, features or components are included, but not that others are excluded. As used in the specification, the term "and / or" includes any and all combinations of one or more of the associated listed items. Embodiments

[0024] Reference to the Drawings Figure 1 The present embodiment describes a water stop device for expansion joints with shock absorption. Through innovative structural design, the device can provide excellent performance in shock absorption, energy absorption, and water stop, especially suitable for use in high-vibration environments.

[0025] Specifically, the structure of the water stop device includes a central water stop body 1, elastic buffer connection assemblies 2 arranged on both sides of the central water stop body 1, and end constraint parts 3. These components cooperate with each other to form an efficient mechanical transmission and energy absorption system.

[0026] First of all, the design of the central water stop body 1 is crucial. The overall shape is like a hollow funnel, with a larger width at the upper and lower anchoring ends in cross-section, and gradually narrowing in the middle region to form a narrow section. The core purpose of this structure is to disperse external loads, especially axial loads, through the deformation behavior under stress.

[0027] Due to the predetermined bending deformation of the hollow funnel-shaped body 1 when subjected to external pressure, especially in the narrow middle section, it can effectively guide the force to be evenly distributed along the axis through the gradient of the bending stress distribution, avoiding local stress concentration and reducing damage caused by stress concentration. In order to further improve the longitudinal compressive stiffness and maintain the transverse deformation ability, the narrow section surface is provided with continuous corrugated reinforcing ribs. This design not only improves the compressive stiffness of the body 1, but also effectively retains the transverse deformation ability, achieving dynamic load transmission and effective energy dissipation.

[0028] The narrow section of the central water stop body 1 is connected with the straight section of the elastic buffer connecting assembly 2, and constitutes the main mechanical transmission path of the water stop device. The elastic buffer connecting assembly 2 includes a straight section 2a, a first deformation section 2b and a second deformation section 2c, which form a continuous variable cross-section structure. The straight section 2a extends from the narrow section of the central water stop body 1 to the outside as the starting part of the buffer connection, which can ensure that the stress distribution of the structure is more uniform under external load, and avoid stress concentration. At the same time, the first deformation section 2b is connected with the straight section 2a and forms a circular arc-shaped bending part. The design of the bending part ensures that the first deformation section 2b can absorb low-frequency vibration energy through elastic buckling in the initial deformation stage, preventing adverse effects caused by vibration. Specifically, the design of the bending part of the first deformation section 2b can effectively reduce the transmission strength of the vibration, and absorb the initial impact of the vibration through elastic buckling, preventing the structure from being directly affected by severe vibration.

[0029] The end of the first deformation section 2b is connected with the second deformation section 2c, which is designed in a tapered hook shape, and its cross-sectional thickness gradually decreases along the length direction, forming a gradient of decreasing stiffness. This design allows the second deformation section 2c to gradually trigger the plastic hinge mechanism when subjected to impact load, relying on the ductility and gradual deformation ability of the material to absorb high-frequency vibration energy in stages.

[0030] Specifically, when the device is subjected to a large amplitude of vibration impact, the second deformation section 2c first undergoes elastic deformation, and as the vibration intensity increases, it gradually reaches the plastic deformation stage, further absorbing and attenuating the vibration energy. Due to the step-by-step ductility of the material, this process not only achieves effective energy attenuation, but also avoids damage or failure of the structure caused by sudden vibration impact.

[0031] The end of the second deformation section 2c is connected with the end constraint part 3. This connection area not only provides a stable structure fixing function, but also effectively prevents the water stop device from shifting or loosening due to vibration or external load changes during use. The semicircular cross-section block structure of the end constraint part 3 forms an interference fit with the pre-buried groove of the edge beam of the expansion joint, so that the installation position of the water stop device is firm and reliable. Through this interference fit, the close combination between the block structure and the groove ensures that the water stop device is not easy to displace during use, and can maintain its stable working state for a long time.

[0032] Overall, the function of the water stop device is realized in dependence of the close cooperation of the central water stop body 1, the elastic buffer connecting assembly 2 and the end constraint part 3. The design of the central water stop body 1 enables it to guide the external pressure to other parts of the device by bending deformation when subjected to external load, avoiding local stress concentration. The buffering effect of the connecting arm 2 further disperses the influence of external vibration and load, so that the water stop device can gradually attenuate energy when facing different intensities of vibration, avoiding structural failure. The fixing effect of the end constraint part 3 ensures that the device can still maintain its original performance during long-term use, without displacement due to vibration or load.

[0033] In different working environments, especially in environments with high vibration frequency, the elastic deformation of the central water stop body 1 and the step-by-step deformation of the buffer assembly 2 can effectively absorb and disperse vibration energy, avoiding the transmission of vibration to the expansion joint or surrounding structure, playing a protective role. Moreover, the cooperative work of the central water stop body 1 and the buffer assembly 2 ensures that the device can operate stably under different vibration intensities and maintain high shock-absorbing effect for a long service life.

[0034] It should be noted that the specific material selection and its specific mechanical property parameters, such as the yield strength and elastic modulus of the material, although have important influence on the performance of the present application, but since they belong to the known technology mastered by the person skilled in the art, the present embodiment does not disclose them in detail. Therefore, the selection of specific materials and the optimization of structural design can be adjusted by the technical personnel according to the actual use environment and load condition.

[0035] In summary, the present embodiment ensures that the water stop device can effectively play its water stopping and shock-absorbing functions in the expansion joint, preventing the adverse effects of external load and vibration on the structure, prolonging the service life of the device and improving the stability and seismic capacity of the structure.

[0036] Although exemplary embodiments of the present disclosure have been described, it should be understood that those of ordinary skill in the art can make various changes and modifications to the exemplary embodiments of the present disclosure without departing from the spirit and scope of the present disclosure in essence. Therefore, all changes and modifications are included in the protection scope of the present disclosure defined by the claims. The present disclosure is defined by the appended claims, and the equivalents of these claims are also included.

Claims

1. A waterstop device for a contraction joint with shock absorption, characterized in that The application relates to a central waterstop body and a flexible buffer connecting assembly. The central waterstop body is in a hollow funnel shape as a whole, has a large width at upper and lower edges, and gradually shrinks in a middle region to form a narrow section. The flexible buffer connecting assembly is arranged on both sides of the central waterstop body, and comprises a straight section, a first deformation section and a second deformation section. The first deformation section is connected with the straight section and forms a bending part.

2. The expansion joint waterstop with shock absorption according to claim 1, characterized in that, The second deformation section is connected with the first deformation section and is in a tapered hook shape, and the thickness of the second deformation section gradually decreases along the length direction.

3. The expansion joint waterstop with shock absorption according to claim 1, characterized in that, The end constraint part is arranged at the end of the second deformation section and adopts a half-circle cross-section embedded block structure. The embedded block structure is in an interference fit with a pre-embedded groove of a contraction joint edge beam. The narrow section surface of the central waterstop body is provided with corrugated reinforcing ribs. The cross section of the second deformation section is in a hook shape, and the thickness thereof decreases along the length direction according to an exponential function.

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