Concrete-free water-tight type telescopic device

Abstract

The utility model relates to a concrete-free water-tight type telescopic device. An existing bridge expansion device is sealed in a concrete pouring mode, complete compactness cannot be guaranteed, and the water sealing performance is poor. The device comprises a water stop piece, the water stop piece is located at the top of a structural joint between a first beam body and a second beam body, and the two longitudinal ends of the water stop piece are fixed to the end face of the first beam body and the end face of the second beam body respectively; mounting grooves are formed in the upper parts of the end surfaces of the first beam body and the second beam body; and elastic sealing pieces are filled in the mounting grooves and above the water stop pieces. Concrete pouring is replaced by elastic sealing piece pouring, the elastic sealing piece can circulate in the space between the installation groove and the water stop piece, gaps between the water stop piece and the first beam body and gaps between the water stop piece and the second beam body are filled and sealed, sealing can be better conducted, the problem that water leakage is caused due to the fact that a traditional water stop belt is not installed in place is solved, and the service life of the water stop belt is prolonged. Therefore, the water sealing performance of the telescopic device is further improved.

Description

Technical Field

[0001] This utility model relates to the technical field of bridge expansion joints, specifically to a concrete-free, watertight expansion joint. Background Technology

[0002] In bridge construction, bridge expansion joints are an important component of the bridge structure. They are designed to accommodate the deformation of the bridge beams and are typically installed between the two beam ends, between the beam end and the abutment, or at the hinged joints of the bridge.

[0003] Currently, the gap between the body of a bridge expansion joint and the bridge groove is mostly filled with poured concrete, and bridge expansion joints generally use waterstop structures for water tightness and drainage. For example, utility model patent CN202221406045.5 discloses a seamless concrete bridge expansion joint structure, in which the two ends of the waterstop are fixed to connecting steel sections in the left and right pre-reserved grooves. This waterstop structure needs to be tightly fitted to the expansion joint groove during installation. By pouring concrete, the waterstop is tightly connected to the groove, thus achieving the water tightness and drainage functions. However, once the concrete between the bridge expansion joint body and the bridge groove has solidified, shrinkage may create tiny gaps. When the gap size exceeds the deformation of the waterstop itself, these gaps may not be completely tight. Furthermore, during installation, the contact surfaces of the waterstop, groove, and concrete must be adjusted to ensure tightness; any problem in any of these areas can lead to water seepage or leakage.

[0004] Therefore, it is necessary to design new bridge expansion joints to overcome the above-mentioned defects. Summary of the Invention

[0005] The purpose of this invention is to provide a concrete-free, watertight expansion joint to solve the problem that existing bridge expansion joints cannot guarantee complete compaction and have poor watertightness by filling the gaps with concrete.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A concrete-free, watertight expansion joint includes a water-stopping component located at the top of the structural joint between a first beam and a second beam, with its longitudinal ends fixed to the end faces of the first beam and the second beam, respectively.

[0008] Both the first beam and the second beam have mounting grooves on the upper part of their end faces, and the mounting grooves and the top of the water-stopping element are filled with elastic sealing elements.

[0009] Furthermore, vertical adjusting steel plates are provided on both sides of the water-stopping component. The adjusting steel plates are arranged horizontally, and a first longitudinal guide hole is provided on the adjusting steel plate.

[0010] Furthermore, the water-stopping element is an elastomer, and the elastomer has transverse openings.

[0011] Furthermore, a vertical anti-collision baffle is provided on the outer side of the adjusting steel plate, the anti-collision baffle is arranged horizontally, and the outer side of the anti-collision baffle is a paving layer.

[0012] Furthermore, a fixing steel plate is provided on the bottom surface of the mounting groove, and vertical shear studs are provided at the bottom of the fixing steel plate. The shear studs are pre-embedded in the first beam and the second beam.

[0013] Furthermore, a plurality of vertical connecting plates are provided between the adjusting steel plate and the anti-collision baffle. The connecting plates are arranged longitudinally and have transverse second guide holes.

[0014] The bottom of the connecting plate is fixed to the fixed steel plate.

[0015] Furthermore, a template is provided on the outer side of the adjusting steel plate, the template is arranged horizontally, and concrete is poured between the template and the anti-collision baffle.

[0016] Alternatively, the water-stopping element can be a water-stopping strip.

[0017] Furthermore, a baffle is provided on the outer side of the adjusting steel plate, and the outer side of the baffle is a paving layer.

[0018] Furthermore, the outer side of the baffle is connected to the pre-embedded steel bars by anchor bars, the upper part of the pre-embedded steel bars is located in the pavement layer, and the lower part of the pre-embedded steel bars is located in the first beam and the second beam.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] This utility model provides a concrete-free, watertight expansion joint. The first guide hole of the adjusting steel plate not only allows the flow of the elastic seal to proceed, but also increases the contact area between the elastic seal and the adjusting steel plate, thus improving the sealing performance of the elastic seal and enhancing the watertightness of the expansion joint.

[0021] Meanwhile, the expansion joint is more efficient to install on site, and the elastic seal replaces the traditional installed waterstop, thereby further improving the water tightness of the expansion joint. Attached Figure Description

[0022] 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 embodiments can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a structural cross-sectional view of Embodiment 1 of the present invention (the mounting groove is not equipped with the adjusting steel plate, connecting plate, welding steel plate and anti-collision baffle).

[0024] Figure 2 This is a structural cross-sectional view of Embodiment 1 of the present invention (without the cast elastic seal);

[0025] Figure 3 This is a structural cross-sectional view of Embodiment 1 of the present invention (the elastic sealing element has been cast).

[0026] Figure 4 This is a structural cross-sectional view of Embodiment 2 of the present invention (without the cast elastic seal);

[0027] Figure 5 This is a structural cross-sectional view of Embodiment 2 of the present invention (the elastic sealing element has been cast).

[0028] Figure 6 This is a structural cross-sectional view of Embodiment 3 of the present invention (without the cast elastic seal);

[0029] Figure 7 This is a structural cross-sectional view of Embodiment 3 of this utility model (the elastic seal has been cast).

[0030] The diagram is labeled as follows:

[0031] 1-First beam, 2-Second beam, 3-Installation groove, 31-Adjusting steel plate, 311-First guide hole, 32-Connecting plate, 321-Second guide hole, 33-Fixing steel plate, 331-Shear nail, 34-Anti-collision baffle, 35-Formwork, 36-Baffle, 4-Waterstop, 41-Opening, 5-Elastic sealant, 6-Pavement layer, 7-Concrete, 8-Embedded steel bar, 9-Anchor bar, 10-Construction joint. Detailed Implementation

[0032] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0033] In the description of this utility model, it should be understood that the terms "upper", "lower", "vertical", "top", "bottom", "inner", "outer", "longitudinal", "lateral", etc., 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 utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection," "setting," etc., should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] Furthermore, in the description of this utility model, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Of course, such terms can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in a sequence other than those illustrated or described herein.

[0036] In a specific implementation, the direction of the line is defined as longitudinal, that is... Figure 1 From left to right, the direction of structural joint 10 is defined as transverse, the direction closer to structural joint 10 is defined as inner side, and the direction farther from structural joint 10 is defined as outer side.

[0037] This invention provides a concrete-free, watertight expansion joint. The joint includes a waterstop 4 located at the top of the structural joint 10 between the first beam 1 and the second beam 2. The longitudinal ends of the waterstop 4 are fixed to the end faces of the first beam 1 and the second beam 2, respectively. An installation groove 3 is provided on the upper part of the end faces of both the first beam 1 and the second beam 2. An elastic sealing element 5 is filled in the installation groove 3 and above the waterstop 4. The elastic sealing element 5 is made of a flexible polymer material with good elasticity and adhesion; rubber sealing materials can also be used. During casting, the elastic sealing element 5 can circulate within the space between the installation groove 3 and the waterstop 4, filling and sealing the gap between the waterstop 4 and the first beam 1 and the second beam 2. This replaces the traditional installed waterstop, providing better sealing and solving the problem of leakage caused by improper installation of the traditional waterstop, thereby further improving the watertightness of the expansion joint.

[0038] The waterstop component 4 of this utility model can adopt two structural forms: one is an elastomer, and the other is a waterstop strip.

[0039] When an elastomer is used, a transverse opening 41 is provided within the elastomer to provide deformation. The structure of the other parts is as follows:

[0040] Vertical adjusting steel plates 31 are provided on both sides of the waterstop 4. The adjusting steel plates 31 are arranged horizontally and have longitudinal first guide holes 311. Vertical anti-collision baffles 34 are provided on the outer side of the adjusting steel plates 31. The anti-collision baffles 34 are arranged horizontally and the outer side of the anti-collision baffles 34 is the pavement layer 6. Multiple vertical connecting plates 32 are provided between the adjusting steel plates 31 and the anti-collision baffles 34. The connecting plates 32 are arranged longitudinally and have transverse second guide holes 321. The bottom of the connecting plates 32 is fixed to the fixed steel plate 33, which is located on the bottom surface of the mounting groove 3. Vertical shear nails 331 are provided at the bottom of the fixed steel plate 33. The shear nails 331 are pre-embedded in the first beam 1 and the second beam 2. The elastic sealing element 5 flows through the first guide holes 311 and the second guide holes 321, filling the entire space between the two anti-collision baffles 34.

[0041] The elastic seal 5 can also be partially filled between the two anti-collision baffles 34. A template 35 is set on the outer side of the adjusting steel plate 31. The template 35 is arranged horizontally and blocks the first guide hole 311 from the outside. After the elastic seal 5 is poured, the template 35 can be removed and concrete 7 is poured between the template 35 and the anti-collision baffle 34.

[0042] When a waterstop is used, the structure of the other parts is as follows:

[0043] Vertical adjusting steel plates 31 are provided on both sides of the waterstop 4. The adjusting steel plates 31 are arranged horizontally and have longitudinal first guide holes 311. A baffle 36 is provided on the outer side of the adjusting steel plate 31, which blocks the first guide holes 311 from the outside. The outer side of the baffle 36 is the pavement layer 6. The outer side of the baffle 36 is connected to the pre-embedded steel bar 8 through anchor bars 9. The upper part of the pre-embedded steel bar 8 is located in the pavement layer 6, and the lower part of the pre-embedded steel bar 8 is located in the first beam 1 and the second beam 2.

[0044] Different structural forms result in the following embodiments:

[0045] Example 1:

[0046] like Figures 1 to 3As shown, the concrete-free, watertight expansion joint of this embodiment includes main components such as a first beam 1, a second beam 2, a waterstop 4, an elastic seal 5, and a pavement layer 6. A structural joint 10 is formed between the first beam 1 and the second beam 2. A waterstop 4, which seals the structural joint 10, is provided within the joint. The waterstop 4 is an elastic body, and its interior has an opening 41 that allows for deformation. In this embodiment, the opening 41 is a through hole. During installation, the waterstop 4 has a certain degree of compression with the first beam 1 and the second beam 2. Installation grooves 3 are provided at the ends of the first beam 1 and the second beam 2. An elastic seal 5 is cast in the space between the installation groove 3 and the waterstop 4. In this embodiment, the elastic seal 5 is made of polyurethane, and the waterstop 4 provides support for the elastic seal 5. During casting, the elastic seal 5 can circulate within the space between the installation groove 3 and the waterstop 4. The elastic seal 5 is typically made of a flexible polymer material with good elasticity and adhesion properties, or it can be made of rubber sealing material. The rubber sealing material can fill and seal the gap between the waterstop 4 and the first beam 1 and the second beam 2, replacing the traditional installed waterstop. This provides a better seal and solves the problem of leakage caused by improper installation of the traditional waterstop, thus further improving the water tightness of the expansion joint. Furthermore, the rubber sealing material has good sound absorption properties, which helps improve the overall noise reduction effect of the expansion joint. When the elastic seal 5 cracks, it can be repaired on-site by casting a new elastic seal 5 at the crack. The repaired elastic seal 5 has a good bond, therefore, the elastic seal 5 can be quickly maintained and is cost-effective.

[0047] like Figure 2As shown, the mounting groove 3 is equipped with an adjusting steel plate 31, a connecting plate 32, a fixing steel plate 33, and a crash barrier 34. The adjusting steel plate 31 has a first guide hole 311 for the elastic seal 5 to flow through. The adjusting steel plate 31 is installed in the mounting groove 3 via the connecting plate 32, which is spaced along the width of the bridge. The connecting plate 32 has a second guide hole 321 for the elastic seal 5 to flow through. The first guide hole 311 and the second guide hole 321 not only allow the elastic seal 5 to flow through, but also increase the contact area between the elastic seal 5 and the adjusting steel plate 31 and the connecting plate 32, thus improving the sealing performance of the elastic seal 5 and enhancing the water tightness of the expansion joint. The fixed steel plate 33 is installed at the bottom of the mounting groove 3 and fixed to the corresponding beam by shear studs 331. The connecting plate 32 is installed on the fixed steel plate 33, and the two sides of the waterstop 4 are fixed to the fixed steel plate 33. The fixed steel plate 33 is arranged along the entire width of the bridge deck, which facilitates the on-site installation and positioning of the expansion joint, is more conducive to ensuring welding strength, and reduces installation time. The structural dimensions of the fixed steel plate 33 can be specially designed according to the design load requirements of the bridge vehicles. For example, for heavy-duty vehicles, a fixed steel plate 33 with higher load-bearing capacity and thicker material and reinforced connecting shear studs 331 can be designed. In addition, a crash barrier 34 is installed on the outside of the connecting plate 32, and a pavement layer 6 is poured on the outside of the crash barrier 34. The crash barrier 34 can be made of steel plate and can be adjusted according to the actual installation size requirements.

[0048] In summary, the installation method of Example 1 includes the following steps:

[0049] S1. Excavate and clean the entire area of ​​the installation slot 3, and fix the steel plate 33 onto the corresponding beam using shear nails 331;

[0050] S2. Install the water-stop 4 in the structural joint 10. The two sides of the water-stop 4 are fixed on the fixed steel plate 33. Then press the water-stop 4 into the structural joint 10 so that the water-stop 4 fits tightly with the structural joint 10 between the first beam 1 and the second beam 2.

[0051] S3. Weld multiple connecting plates 32 onto the fixed steel plate 33, adjust the steel plate 31 and the anti-collision baffle 34 onto the connecting plates 32, and clean the welding slag and weld seams to keep the installation groove 3 clean.

[0052] S4. Cast an elastic sealing element 5 into the space between the mounting groove 3 and the water-stopping element 4 to fill the space between the mounting groove 3 and the water-stopping element 4.

[0053] Example 2:

[0054] like Figure 4 and Figure 5As shown, the difference between Embodiment 2 and Embodiment 1 is that: a template 35 is provided on one side of the adjusting steel plate 31, and a casting groove is formed between the template 35, the connecting plate 32, and the water-stopping component 4. The elastic sealing component 5 is cast in the casting groove, and concrete 7 is cast in the remaining space of the installation groove 3. This filling method can save production costs, and the casting groove can make the elastic sealing component 5 form a boss, which provides tensile force during the stretching process of the elastic sealing component 5, preventing the elastic sealing material 5 from cracking due to stretching and causing water leakage in the expansion joint.

[0055] In summary, the installation method of Example 2 includes the following steps:

[0056] S1. Excavate and clean the entire area of ​​the installation slot 3, and fix the steel plate 33 on the corresponding beam body by shear nails 331;

[0057] S2. Install the water-stop 4 in the structural joint 10. The two sides of the water-stop 4 are fixed on the fixed steel plate 33. Then press the water-stop 4 into the structural joint 10 so that the water-stop 4 fits tightly with the structural joint 10 between the first beam 1 and the second beam 2.

[0058] S3. Weld multiple connecting plates 32 onto the fixed steel plate 33, weld the adjusting steel plate 31 and the anti-collision baffle 34 onto the connecting plate 32, install the template 35 on one side of the adjusting steel plate 31, and clean the welding slag and weld seam to keep the installation groove 3 clean.

[0059] S4. Pour the elastic sealing element 5 into the pouring groove formed between the template 35, the connecting plate 32 and the waterstop 4, so that it fills the pouring groove. After the elastic sealing element 5 is poured, remove the template 35.

[0060] S5. Pour concrete 7 into the remaining space of the installation slot 3 to fill it completely.

[0061] Example 3:

[0062] like Figure 6 and Figure 7As shown, Embodiment 3 is an expansion joint suitable for railway bridges. This concrete-free, watertight expansion joint includes main components such as a first beam 1, a second beam 2, a waterstop 4, an elastic seal 5, a pavement layer 6, embedded reinforcing bars 8, and anchor bars 9. A structural joint 10 is formed between the first beam 1 and the second beam 2. A waterstop 4 is provided within the structural joint 10 to seal it. The waterstop 4 is a waterstop strip, with both ends fixed to the first beam 1 and the second beam 2, respectively. Installation grooves 3 are provided at the ends of the first beam 1 and the second beam 2. An elastic seal 5 is cast in the space between the installation groove 3 and the waterstop 4. In this embodiment, the elastic seal 5 is made of polyurethane. An adjusting steel plate 31 is provided within the installation groove 3. The adjusting steel plate 31 has a first guide hole 311 for the elastic seal 5 to flow through. Embedded reinforcing bars 8 are provided on both the first beam 1 and the second beam 2. The adjusting steel plate 31 is fixedly connected to the embedded reinforcing bars 8 via anchor bars 9. In addition, a baffle 36 is installed on the outside of the adjusting steel plate 31 to block the first guide hole 311. A paving layer 6 is poured on the outside of the baffle 36, and an elastic sealing element 5 is poured in the space between the baffle 36 and the water-stopping element 4.

[0063] In summary, the installation method of Example 3 includes the following steps:

[0064] S1. Excavate and clean the entire area of ​​installation slot 3;

[0065] S2. Install a waterstop in the structural joint 10, with both ends of the waterstop fixed to the first beam 1 and the second beam 2 respectively.

[0066] S3. The adjusting steel plate 31 is fixedly connected to the pre-embedded steel bars 8 of the first beam 1 and the second beam 2 through the anchor bar 9. A baffle 36 is welded on the outside of the first guide hole 311 of the adjusting steel plate 31, and the welding slag and weld are cleaned to keep the installation groove 3 clean.

[0067] S4. Cast an elastic sealant 5 into the gap between the mounting groove 3 and the waterstop, so that it fills the area between the mounting groove 3 and the waterstop.

[0068] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A concrete-free, watertight expansion joint, characterized in that: The device includes a water-stopping component (4), which is located at the top of the structural joint (10) between the first beam (1) and the second beam (2). The longitudinal ends of the water-stopping component (4) are respectively fixed to the end faces of the first beam (1) and the second beam (2). The upper part of the end face of the first beam (1) and the second beam (2) are provided with mounting grooves (3), and the mounting grooves (3) and the top of the water-stopping component (4) are filled with elastic sealing components (5).

2. The concrete-free, watertight expansion joint according to claim 1, characterized in that: The water-stopping component (4) is provided with vertical adjustment steel plates (31) on both sides. The adjustment steel plates (31) are arranged horizontally and have a longitudinal first guide hole (311) on them.

3. The concrete-free, watertight expansion joint according to claim 2, characterized in that: The water-stopping component (4) is an elastic body, and a transverse opening (41) is provided in the elastic body.

4. A concrete-free, watertight expansion joint according to claim 3, characterized in that: A vertical anti-collision baffle (34) is provided on the outside of the adjusting steel plate (31). The anti-collision baffle (34) is arranged horizontally, and the outside of the anti-collision baffle (34) is a pavement layer (6).

5. A concrete-free, watertight expansion joint according to claim 4, characterized in that: The bottom surface of the mounting groove (3) is provided with a fixing steel plate (33), and the bottom of the fixing steel plate (33) is provided with a vertical shear nail (331), which is embedded in the first beam (1) and the second beam (2).

6. A concrete-free, watertight expansion joint according to claim 5, characterized in that: A plurality of vertical connecting plates (32) are provided between the adjusting steel plate (31) and the anti-collision baffle (34). The connecting plates (32) are arranged longitudinally, and a second transverse guide hole (321) is provided on the connecting plate (32). The bottom of the connecting plate (32) is fixed to the fixing steel plate (33).

7. A concrete-free, watertight expansion joint according to claim 6, characterized in that: The outer side of the adjusting steel plate (31) is provided with a template (35), the template (35) is arranged horizontally, and concrete (7) is poured between the template (35) and the anti-collision baffle (34).

8. A concrete-free, watertight expansion joint according to claim 2, characterized in that: The water-stopping component (4) is a water-stopping strip.

9. A concrete-free, watertight expansion joint according to claim 8, characterized in that: The outer side of the adjusting steel plate (31) is provided with a baffle (36), and the outer side of the baffle (36) is a paving layer (6).

10. A concrete-free, watertight expansion joint according to claim 9, characterized in that: The outer side of the baffle (36) is connected to the pre-embedded steel bar (8) by the anchor bar (9). The upper part of the pre-embedded steel bar (8) is located in the pavement layer (6), and the lower part of the pre-embedded steel bar (8) is located in the first beam (1) and the second beam (2).

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