A bridge expansion device and installation method thereof

Abstract

A bridge expansion device and its installation method, comprising a first beam, a second beam and a expansion member, wherein a structural joint is formed between the first beam and the second beam, and characterized in that: an installation slot for installing the expansion member is opened at the beam end of the first beam and the beam end of the second beam, a support is installed in the structural joint, the support is located below the expansion member, and elastic sealing members are cast in the installation slot and between the expansion member and the support. The advantages of the present invention are that: after the installation of the bridge expansion device is completed, the elastic sealing member is cast in the installation slot of the beam and between the expansion member and the support, and the elastic sealing member has good shrinkage and deformation performance, which can meet the requirements of the mutual displacement between the bridges; at the same time, the material has good bonding performance, and can fill the gap between the expansion device and the slot to achieve seamless connection, thereby preventing water from seeping and leaking from the expansion device on the bridge surface, and achieving a sealing and waterproofing effect.

Description

Technical Field

[0001] The invention relates to the technical field of expansion joints of bridge engineering, and in particular to a bridge expansion device and an installation method thereof. Background Art

[0002] In order to meet the needs of bridge beam deformation, bridge expansion devices are generally installed between the two ends of the bridge beam, between the beam end and the abutment, or at the hinged position of the bridge. At present, the gap between the bridge expansion device body and the bridge notch is filled with concrete pouring. Drainage generally uses a waterstop structure for watertightness and drainage. During installation, the waterstop and the expansion device installation notch need to be close together, and the connection surface between the waterstop and the notch is compacted by pouring concrete. When the concrete solidifies, it may produce fine gaps when it shrinks. Since the waterstop is made of rubber material and has a certain amount of deformation, when the gap size exceeds the deformation of the waterstop itself, these gaps may not be completely compacted. In addition, when the waterstop, notch, and concrete are installed, the contact surfaces between each other should be adjusted to ensure compactness. If there are problems in any of these aspects, water seepage and leakage may occur. In summary, there is a need to improve the existing bridge expansion devices. Summary of the invention

[0003] The first technical problem to be solved by the present invention is to provide a bridge expansion device with good sealing and noise reduction effects in view of the above-mentioned existing technical status.

[0004] The second technical problem to be solved by the present invention is to provide an installation method for a bridge expansion device which is convenient to construct and can achieve good sealing and noise reduction performances in response to the above-mentioned existing technical status.

[0005] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: the bridge expansion device includes a first beam body, a second beam body and a expansion member, and a structural joint is formed between the first beam body and the second beam body, characterized in that: installation grooves for installing the expansion member are opened at the beam ends of the first beam body and the beam ends of the second beam body, and a support member is installed in the structural joint, and the support member is located below the expansion member, and elastic sealing members are cast in the installation groove and between the expansion member and the support member.

[0006] As a preferred solution of the support member, the support member includes a support plate and a support sleeve. The support plate is U-shaped and has an opening facing upward. Both sides of the support plate are fixed on the beam body on the corresponding sides. The support sleeve is installed on the support plate. There are at least two support plates and they are spaced apart along the transverse bridge direction.

[0007] In order to enable the support member to produce elastic deformation, the support plate and the support sleeve are both elastic members.

[0008] The support sleeve may have various structures. Preferably, the support sleeve is cylindrical.

[0009] In order to fix the support plate, a pre-embedded steel plate is pre-embedded in the installation notch, the pre-embedded steel plate is fixed to the beam body through shear nails, and both sides of the support plate are fixed to the pre-embedded steel plates on the corresponding sides.

[0010] In order to adjust the installation height of the telescopic member, a height adjustment component is provided in the installation slot, the height adjustment component is fixed to the embedded steel plate, and the telescopic member is installed on the height adjustment component.

[0011] The telescopic member can have a variety of installation structures. Preferably, the telescopic member includes a first comb plate, a second comb plate, a first support plate and a second support plate. The first support plate is fixed to the outer side of the bottom of the first comb plate, and the second support plate is fixed to the outer side of the bottom of the second comb plate. The first support plate and the second support plate are fixed on the height adjustment components corresponding to the installation slots.

[0012] The height adjustment component can have a variety of structures. Preferably, the height adjustment component includes a height adjustment plate and ribs. The height adjustment plates are spaced apart along the length direction of the installation slots. The height adjustment plate is provided with corresponding rib holes. The ribs pass through the rib holes and are fixed to the height adjustment plate.

[0013] In order to prevent the telescopic device from being directly impacted by the vehicle, an anti-collision baffle is welded on the outer side of the height adjustment plate. The anti-collision baffle, elastic seal, telescopic member and bridge pavement are flush. The anti-collision baffle is directly welded on site, which can simplify the construction and achieve rapid installation. The anti-collision baffle can be made of steel plate and can be adjusted in height according to the actual installation size requirements.

[0014] The height adjustment plate can have a variety of structures. Preferably, the height adjustment plate is L-shaped and has a horizontal support step formed on the inner side of the middle part. The bottom of the height adjustment plate is welded and fixed to the embedded steel plate. The first support plate and the second support plate are supported on the corresponding horizontal support step and are welded and fixed to the height adjustment plate. In addition, in addition to the L-shape, the height adjustment plate can also be T-shaped or other different shapes.

[0015] As another preferred embodiment of the support member, the support member is an elastic sleeve, which is arranged along the length direction of the structural seam, and has bosses extending from the top of the elastic sleeve to both sides in the width direction of the elastic sleeve, and the bosses are supported on the installation slots on the corresponding sides.

[0016] The technical solution adopted by the present invention to solve the above second technical problem is: the installation method of the bridge expansion device comprises the following steps:

[0017] S1. Dig and clean the installation notch area as a whole, and measure the notch depth;

[0018] S2. According to the notch depth measured in step S1, the height adjustment component of the telescopic device is processed accordingly, the height adjustment component is welded to the embedded steel plate, and the welding slag and weld are cleaned to keep the notch clean;

[0019] S3. Install the support plate of the support member, weld the support plate to the embedded steel plate, or fasten the support plate to the structural seam at the bottom of the installation notch with screws;

[0020] S4. Place the support sleeve of the support member into the support plate and keep an interference margin to make the structural seam between the support sleeve and the beam body close to each other;

[0021] S5. Adjust the position of the telescopic member in the longitudinal and transverse directions of the bridge and the flatness of the bridge road surface, and then weld and fix the telescopic member on the height adjustment assembly;

[0022] S6. Weld and fix the anti-collision baffle on the outside of the height adjustment assembly, and make the upper surface of the anti-collision baffle flush with the bridge road surface;

[0023] S7. Clean the weld and welding slag to ensure the groove is clean;

[0024] S8. Pour elastic sealing members from the gaps between the comb teeth of the telescopic member and the height adjustment assembly to fill the gaps in the installation notch area and the structural seams above the support members.

[0025] Compared with the prior art, the advantages of the present invention are: after the installation of the bridge expansion device, the water stop structure is eliminated by pouring elastic seals in the installation notches of the beam body and between the expansion member and the support member. Due to the good shrinkage and deformation performance of the elastic seal, the mutual displacement requirements between bridges can be met; at the same time, the material has good bonding properties, which can fill the gap between the expansion device and the notch to achieve seamless connection, thereby preventing water from seeping and leaking from the expansion device on the bridge surface, achieving a sealing and waterproof effect. The elastic seal also has a sound-absorbing function, which is beneficial to improving the overall noise reduction effect of the expansion device. In addition, the use of a concrete-free bridge expansion device can eliminate the concrete transition section structure, saving the time required for the construction and curing of the concrete transition section during the installation of the expansion device, thereby achieving rapid installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of the first embodiment of the present invention (elastic sealing member is not cast);

[0028] Figure 3 for Figure 2 A schematic structural diagram of the telescopic device from another angle;

[0029] Figure 4 It is a structural cross-sectional view of Embodiment 1 of the present invention;

[0030] Figure 5 is another structural cross-sectional view of the first embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of the height adjustment plate according to the first embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0033] Figure 8 This is a schematic diagram of the structure of Embodiment 3 of the present invention;

[0034] Fig. 9 This is a schematic structural diagram of another height adjustment plate used in the present invention. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below with reference to the accompanying drawings.

[0036] Embodiment 1:

[0037] like Figures 1 to 4 As shown, the bridge expansion device of this embodiment includes the main components such as the first beam body 1, the second beam body 2, the expansion member 4, the support, the height adjustment component 8, the anti-collision baffle 9 and the elastic seal 11. A structural seam 10 is formed between the first beam body 1 and the second beam body 2. The beam ends of the first beam body 1 and the second beam body 2 are both provided with installation slots 3. The bottom of the installation slots 3 is pre-embedded with an embedded steel plate 6, and the embedded steel plate 6 is fixed to the corresponding beam body through shear nails 7. The embedded steel plate 6 is arranged along the width of the bridge deck, which is convenient for the installation and positioning of the expansion device on site, more conducive to the guarantee of welding strength, and reduces the installation construction time. The structural dimensions of the embedded steel plate 6 can be specially designed according to the design load requirements of the bridge vehicle, such as the design load-bearing capacity is higher, the thickened embedded steel plate 6 and the reinforced connecting shear nails 7 are used for heavy-load vehicles. In this embodiment, each beam body is provided with two rows of shear nails 7, and the arrangement spacing of the shear nails 7 in the length direction of the installation slot 3 is set in combination with the arrangement spacing of the beam body steel bars.

[0038] The support member is installed in the structural joint 10 and is located below the telescopic member 4. Figure 3 and Figure 4As shown, the support member includes a support plate 51 and a support sleeve 52. Both the support plate 51 and the support sleeve 52 are elastic members with good elastic deformation. The support plate 51 is U-shaped with the opening facing upward, and the support sleeve 52 is cylindrical. During installation, first fix both sides of the support plate 51 on the embedded steel plate 6 on the corresponding side, and then install the support sleeve 52 on the support plate 51. When the support sleeve 52 is installed, there is a certain degree of compression between the first beam body 1 and the second beam body 2. In this embodiment, there are two support plates 51 on one side and they are spaced apart along the transverse bridge direction.

[0039] like Figure 1 , Figure 4 and Figure 5 As shown, an elastic seal 11 is cast in the installation slot 3 and between the telescopic member 4 and the support. During casting, the elastic seal 11 can flow in the installation slot area and the area between the telescopic member 4 and the support. The elastic seal 11 is usually made of a flexible polymer material with good elasticity and bonding properties, and a rubber sealing material can also be used. The rubber sealing material can fill and seal the gap between the support and the beam body, eliminating the water stop structure, which is beneficial to reducing the probability of water seepage and leakage of the telescopic device. The elastic sealing material has good bonding performance with the installation slot 3 and high sealing performance, which prevents water on the bridge deck from seeping and leaking at the telescopic device. The rubber sealing material has good deformation function, which can meet the requirements of mutual displacement between bridges, and also has good sound absorption effect, which is beneficial to improving the overall noise reduction effect of the telescopic device.

[0040] Each mounting slot 3 is equipped with a height adjustment component 8. The height adjustment component 8 includes a height adjustment plate 81 and a through rib 82. The height adjustment plates 81 are spaced along the length direction of the mounting slot 3. The height adjustment plates 81 are provided with corresponding through rib holes 811. The through rib 82 passes through the through rib holes 811 and is fixed to the height adjustment plate 81. The bottom of the height adjustment plate 81 is welded and fixed to the embedded steel plate 6. During casting, the elastic seal 11 circulates between the mounting slot 3 area and the area below the comb plate through the gap between the height adjustment plates 81, so that the overall sealing performance of the telescopic device is better.

[0041] The telescopic member 4 of this embodiment includes a first comb plate 41, a second comb plate 42, a first support plate 43 and a second support plate 44, wherein the first support plate 43 is fixed to the outer side of the bottom of the first comb plate 41, and the second support plate 44 is fixed to the outer side of the bottom of the second comb plate 42.

[0042] The support plate and the comb plate are preferably integrally rolled to improve the overall strength and rigidity of the product, and avoid the errors and defects caused by processing and manufacturing when the two parts are connected, and the safety hazards caused by rusting of the welding parts during the later use. In addition, the support plate and the comb plate can also be fixed by welding.

[0043] like Figure 4 and Figure 6 As shown, the height adjusting plate 81 is L-shaped and has a horizontal supporting step 812 formed on the inner side of the middle portion. The first supporting plate 43 and the second supporting plate 44 are supported on the horizontal supporting step 812 of the corresponding height adjusting component 8 and are welded and fixed to the height adjusting plate 81. In this way, the telescopic member 4 is fixed on the height adjusting component 8.

[0044] like Fig. 9 As shown, the height adjustment plate 81 is T-shaped, and has rib holes 811 on the height adjustment plate 81. The height adjustment plate 81 is not limited to L-shaped and T-shaped, and other different shapes can also be used.

[0045] As can be seen from the above installation structure, the telescopic member 4 of this embodiment is directly welded and fixed on the embedded steel plate 6 through the height adjustment component 8, which reduces the intermediate connection links and reduces the time consumption. In addition, the height adjustment component 8 can be timely manufactured, adjusted, and positioned according to the actual depth requirements of the installation notch 3 at the construction site, and the arrangement spacing can also be adjusted arbitrarily. A fully automatic manipulator can be used for operation, realizing automated and intelligent welding, improving the on-site welding accuracy, improving the construction quality of the telescopic device, reducing the installation time of the telescopic device, and ensuring the impact resistance and durability of the product.

[0046] In this embodiment, the anti-collision baffle 9 is arranged on the outside of the height adjustment component 8 and is welded and fixed to the outer side of the height adjustment plate 81, and the anti-collision baffle 9 is flush with the elastic seal 11, the bridge pavement 12, the first comb plate 41 and the second comb plate 42. The anti-collision baffle 9 is directly welded on site, which reduces the time required for the construction and curing of the concrete transition section, shortens the time for on-site installation or later maintenance and replacement of the telescopic device, simplifies the construction, and realizes rapid installation. After the anti-collision baffle 9 is set, on the one hand, the telescopic member 4 can be prevented from being damaged by external forces, and on the other hand, the installation structure of the height adjustment component 8 is made more solid, thereby improving the structural firmness of the telescopic device. In addition, the anti-collision baffle 9 can also be directly welded and fixed on the embedded steel plate 6.

[0047] The length of the telescopic member 4 of the telescopic device of this embodiment can be manufactured and installed in sections according to the lane width or other arbitrary widths, which is convenient for subsequent section maintenance or replacement.

[0048] The installation method of the bridge expansion device comprises the following steps:

[0049] S1. Dig and clean the entire installation slot 3 area, and measure the slot depth;

[0050] S2. According to the notch depth measured in step S1, the telescopic device height adjustment component 8 is processed accordingly, the height adjustment component 8 is welded to the embedded steel plate 6, and the welding slag and weld are cleaned to keep the notch clean;

[0051] S3, installing the support plate 51 of the support member, the support plate 51 is welded to the embedded steel plate 6, or the support plate 51 is fastened to the structural seam 10 at the lower part of the installation notch 3 by screws;

[0052] S4, placing the support sleeve 52 of the support member into the support plate 51, and maintaining an interference margin so that the structural seam 10 between the support sleeve 52 and the beam body is firmly attached;

[0053] S5, adjusting the position of the telescopic member 4 in the longitudinal and transverse directions of the bridge and the flatness of the bridge road surface, and then welding and fixing the telescopic member 4 on the height adjustment component 8;

[0054] S6. Weld and fix the anti-collision baffle 9 on the outer side of the height adjustment component 8, and make the upper surface of the anti-collision baffle 9 flush with the bridge road surface 12;

[0055] S7. Clean the weld and welding slag to ensure the groove is clean;

[0056] S8, pouring elastic sealing members from the gaps between the comb teeth of the telescopic member 4 and the height adjustment assembly 8 to fill the gaps in the installation notch 3 area and the structural seam 10 above the support member.

[0057] Embodiment 2:

[0058] like Figure 7 As shown, the support member of this embodiment is an elastic sleeve 53, which is arranged along the length direction of the structural joint 10. The elastic sleeve 53 is hollow inside, and the top of the elastic sleeve 53 extends to both sides of the elastic sleeve in the width direction. The boss 531 is supported on the installation slot 3 on the corresponding side, specifically, on the embedded steel plate 6 on the corresponding side. In this way, the elastic sleeve 53 is hung between the first beam body 1 and the second beam body 2, and the cast elastic seal 11 presses the elastic sleeve 53 to fix the elastic sleeve 53 on the structural joint 10. The rest of the structure of this embodiment is the same as that of the first embodiment, and will not be described in detail here.

[0059] Embodiment three:

[0060] like Figure 8As shown, on the basis of the second embodiment, the bridge expansion device of this embodiment is provided with a noise reduction component 13 between the expansion member 4 and the elastic seal 11. The noise reduction component 13 is composed of a foam component 131 and a stainless steel plate 132. Among them, the bottom of the noise reduction component 13 is supported on the elastic seal 11, and the top of the noise reduction component 13 is provided with a stainless steel plate 132, and the stainless steel plate 132 is arranged below the first comb plate 41 and the second comb plate 42, and the two sides of the noise reduction component 13 are respectively against the first support plate 43 and the second support plate 44. On the one hand, the noise reduction component 13 can effectively absorb the tire noise of the vehicle, and on the other hand, when the elastic seal 11 expands and contracts with the bridge, the noise reduction component 13 can provide a certain buffer space.

[0061] In addition, the expansion joint device of this embodiment has triangular ribs 14 welded between the first expansion plate 41 and the first supporting rib 43 , and triangular ribs 14 are also welded between the second expansion plate 42 and the first supporting rib 44 , thereby improving the overall structural strength of the expansion member 4 .

[0062] The remaining structures of this embodiment are the same as those of the second embodiment and will not be described in detail here.

[0063] The above description is only a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this field, various modifications or improvements can be made to the present invention without departing from the principle of the present invention. For example, a concrete transition section can be cast on the outside of the telescopic member. For example, in order to increase the structural strength of the telescopic device, reinforcing ribs can be welded between the comb plate and the support plate of the telescopic member. For example, the structure of the support member is not limited to the structure in the above embodiment. These are all considered to be within the scope of protection of the present invention.

Claims

1. A bridge expansion device, comprising a first beam (1), a second beam (2) and a expansion member (4), wherein a structural joint (10) is formed between the first beam (1) and the second beam (2), and characterized in that: An installation slot (3) for installing a telescopic member (4) is provided at the beam end of the first beam body (1) and the beam end of the second beam body (2); a support member is installed in the structural joint (10); the support member is located below the telescopic member (4); an elastic sealing member (11) is cast in the installation slot (3) and between the telescopic member (4) and the support member; a height adjustment component (8) is provided in the installation slot (3); the telescopic member (4) comprises a first comb plate (41), a second comb plate (42), a first support plate (43) and a second support plate (44); the first support plate (43) is fixed The second support plate (44) is fixed to the outer side of the bottom of the second comb tooth plate (42) on the outer side of the bottom of the first comb tooth plate (41); the first support plate (43) and the second support plate (44) are fixed to the height adjustment component (8) corresponding to the mounting slot (3); the height adjustment plate (81) is L-shaped or T-shaped and has a horizontal support step (812) formed on the inner side of the middle; the first support plate (43) and the second support plate (44) are supported on the horizontal support step (812) of the corresponding height adjustment component (8) and are welded and fixed to the height adjustment plate (81); and an anti-collision baffle (9) is welded to the outer side of the height adjustment plate (81).

2. The bridge expansion device according to claim 1, characterized in that: The support member comprises a support plate (51) and a support sleeve (52); the support plate (51) is U-shaped and has an opening facing upward; two sides of the support plate (51) are fixed to the beam body on the corresponding side; the support sleeve (52) is installed on the support plate (51); there are at least two support plates (51) which are spaced apart along the transverse bridge direction.

3. The bridge expansion device according to claim 2, characterized in that: An embedded steel plate (6) is embedded in the installation notch (3), and the embedded steel plate (6) is fixed to the beam body via shear nails (7). Both sides of the support plate (51) are fixed to the embedded steel plates (6) on the corresponding sides.

4. The bridge expansion device according to claim 3, characterized in that: The height-adjusting assembly (8) is fixed to the embedded steel plate (6), and the telescopic member (4) is mounted on the height-adjusting assembly (8).

5. The bridge expansion device according to claim 4, characterized in that: The height adjustment component (8) comprises a height adjustment plate (81) and a through rib (82); the height adjustment plates (81) are spaced apart along the length direction of the mounting notch (3); corresponding through rib holes (811) are formed on the height adjustment plate (81); the through rib (82) passes through the through rib hole (811) and is fixed to the height adjustment plate (81).

6. The bridge expansion device according to claim 5, characterized in that: The anti-collision baffle (9), the elastic sealing member (11), the telescopic member (4) and the bridge pavement (12) are flush with each other.

7. The bridge expansion device according to claim 1, characterized in that: The support member is an elastic sleeve (53), the elastic sleeve (53) is arranged along the length direction of the structural seam (10), a boss (531) is extended from the top of the elastic sleeve (53) to both sides in the width direction of the elastic sleeve, and the boss (531) is supported on the installation slot (3) on the corresponding side.

8. A method for installing a bridge expansion device, characterized in that The bridge expansion device adopts the bridge expansion device according to any one of claims 4 to 7, and the installation method of the bridge expansion device comprises the following steps: S1, dig and clean the entire installation slot (3) area, and measure the slot depth; S2. According to the notch depth measured in step S1, the telescopic device height adjustment component (8) is processed accordingly, the height adjustment component (8) is welded to the embedded steel plate (6), and the welding slag and weld are cleaned to keep the notch clean; S3, installing the support plate (51) of the support member, the support plate (51) is welded to the embedded steel plate (6), or the support plate (51) is fastened to the structural seam (10) at the lower part of the installation notch (3) by screws; S4, placing the support sleeve (52) of the support member into the support plate (51) and maintaining an interference margin so that the structural seam (10) between the support sleeve (52) and the beam body is tightly fitted; S5, adjusting the position of the telescopic member (4) in the longitudinal and transverse directions of the bridge and the flatness with respect to the bridge pavement (12), and then welding and fixing the telescopic member (4) on the height adjustment assembly (8); S6. Welding and fixing the anti-collision baffle (9) on the outer side of the height adjustment component (8), and making the upper surface of the anti-collision baffle (9) flush with the bridge pavement (12); S7. Clean the weld and welding slag to ensure the groove is clean; S8, pouring the elastic sealing member (11) from the gaps between the comb teeth of the telescopic member (4) and the height adjustment assembly (8) to fill the gaps in the installation notch (3) area and the structural seam (10) above the support member.

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