Middle joint type expansion device and bridge expansion joint structure
The design of the center-seam expansion joint device solves the problems of poor waterproof performance and low structural strength of bridge expansion joint devices, achieving high strength, stability and waterproof effect of bridges, extending service life and reducing maintenance costs.
Patent Information
- Application Number
- CN202520512506.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-21
AI Technical Summary
Existing bridge expansion joint devices have poor waterproofing performance and low structural strength, resulting in shortened bridge service life, high maintenance costs, and increased safety hazards.
The system employs a center-gap expansion joint, comprising anchors, expansion panels, a center pad, and a waterstop, forming a symmetrical structure. The anchors are fixedly connected to the bridge body, the expansion displacement holes provide clearance, the waterstop guides drainage, and the center pad reinforces support, forming a grid-like structure to accommodate the expansion and contraction deformation of the bridge.
It improves the structural strength and stability of the bridge, prevents deformation and damage to the expansion joint panels, reduces maintenance frequency, extends service life, enhances waterproof performance, and reduces safety hazards.
Smart Images
Figure CN223951607U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to bridge technical field especially is related to a middle joint type expansion joint and bridge expansion joint structure. BACKGROUND
[0002] In bridge construction, due to temperature change, concrete shrinkage, vehicle load impact and other factors, the bridge structure will produce expansion and contraction deformation.
[0003] The expansion joint device in the prior art includes a tooth-shaped structure located in the bridge expansion joint.
[0004] The applicant finds that the prior art at least has the following technical problems: the conventional expansion joint device has low stability in long-term use, and rainwater erodes the bridge structure through the tooth-shaped structure, so the waterproof performance is poor. The expansion amount is insufficient, which limits the bridge expansion and causes structural damage; the strength of the expansion joint device is low, and the expansion joint device is easily deformed and damaged when the vehicle load passes. These not only affect the normal use performance of the bridge, shorten the service life of the bridge, but also increase the maintenance cost and safety hazards. UTILITY MODEL CONTENT
[0005] The utility model discloses a middle joint type expansion joint and bridge expansion joint structure to solve the technical problems of poor waterproof performance and low structural strength of the bridge expansion joint device in the prior art. The preferred technical solutions in the many technical solutions provided by the utility model can produce many technical effects, which are described below.
[0006] To achieve the above object, the utility model provides the following technical scheme:
[0007] The middle joint type expansion joint provided by the utility model comprises an anchoring piece, an expansion panel, a middle pad and a water stop belt, wherein:
[0008] The anchoring piece is fixed on the opposite sides of the expansion panel and is used for fixed connection with the bridge body on both sides of the expansion joint; the expansion panel is provided with expansion displacement holes, and all the expansion displacement holes are located at the middle position of the expansion panel;
[0009] The middle pad and the water stop belt are supported on the anchoring piece, the middle pad is clamped between the water stop belt and the expansion panel and is located at the bottom of the expansion displacement hole, and the water stop belt is used for flow guiding and water drainage; the anchoring piece, the expansion panel, the middle pad and the water stop belt all have a symmetrical structure about the center of the expansion joint.
[0010] Preferably, the number of expansion displacement holes is multiple, and the expansion displacement holes are arranged at intervals along the length direction and / or the width direction of the expansion panel.
[0011] Preferably, the anchor includes an anchor plate, the anchor plate is provided with a through-hole and a mounting groove, the mounting groove is open towards the inner side and the upper side of the expansion joint, the side of the middle plate and the side of the water stop are all inserted into the mounting groove and arranged horizontally.
[0012] Preferably, the water stop includes a supporting plate and a drainage groove, wherein:
[0013] Two supporting plates are fixedly connected to the opposite sides of the drainage groove respectively, the supporting plates are horizontally arranged, and the supporting plates are supported in the mounting groove and fixedly connected with the middle plate.
[0014] Preferably, the cross section of the drainage groove is U-shaped, and the groove opening of the drainage groove is arranged towards the expansion panel.
[0015] Preferably, the side wall of the mounting groove and the side of the middle plate and the side of the water stop all have a mounting gap.
[0016] Preferably, the anchor is fixedly provided with an angle steel fold plate, the angle steel fold plate is a bent plate structure, at least part of the angle steel fold plate is located in the mounting groove and supports the side of the middle plate and the side of the water stop.
[0017] Preferably, the angle steel fold plate includes a first vertical section, a horizontal section and a second vertical section, wherein:
[0018] The first vertical section, the horizontal section and the second vertical section are integrally formed, the first vertical section is attached to and fixed to the side wall of the mounting groove, the horizontal section is attached to and fixed to the bottom wall of the mounting groove, and the second vertical section is attached to and fixed to the inner side of the anchor.
[0019] Preferably, the expansion displacement hole is provided with more than two rows on the expansion panel, each row of the expansion displacement holes is arranged in the width direction of the expansion panel, the number of the expansion displacement holes in the same row is multiple, and all the expansion displacement holes in the same row are arranged in the length direction of the expansion panel.
[0020] Adjacent two expansion displacement holes in the same row form an expansion rib, and the expansion ribs in different rows are arranged in the length direction of the expansion panel.
[0021] The utility model also provides a bridge expansion joint structure, including expansion joint and being located in the expansion joint above-mentioned middle joint type expansion device.
[0022] The middle joint type expansion device and the bridge expansion joint structure have the following beneficial effects compared with the prior art: when expansion deformation of the bridge structure is caused by factors such as temperature change, concrete shrinkage, vehicle load impact and the like, the area of the expansion displacement hole is enlarged or reduced, expansion of the expansion panel is provided with a space for giving way, the bridge can better meet various complex expansion deformation requirements of the bridge, and damage of the bridge structure caused by limited expansion is reduced. The expansion panel is a whole plate structure, the integrity of the bridge can be ensured, and bumping and large noise are avoided. The anchoring piece, the expansion panel, the middle gusset plate and the water stop belt are in a symmetrical structure about the center of the expansion joint, the overall structural strength and stability are improved, the expansion panel is prevented from being deformed and damaged when the vehicle load passes, the maintenance frequency and cost are reduced, and the safety and durability of the bridge are improved. The anchoring piece improves the connection reliability of the expansion panel and the bridge, the middle gusset plate is located directly below the expansion displacement hole, and the structural support strength of the expansion panel is improved; the water stop belt is located at the bottom of the expansion panel and is used for flow guiding and drainage, rainwater and the like are prevented from penetrating into the bridge structure, the waterproof and foreign matter prevention effects are greatly improved, and the service life of the bridge is effectively prolonged. BRIEF DESCRIPTION OF DRAWINGS
[0023] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0024] Figure 1 is a side view of the middle joint type expansion device embodiment one;
[0025] Figure 2 is a top view of the middle joint type expansion device embodiment one;
[0026] Figure 3 is a side view of the middle joint type expansion device embodiment two;
[0027] Figure 4 is a top view of the middle joint type expansion device embodiment two;
[0028] Figure 5 is a side view of the middle joint type expansion device embodiment three;
[0029] Figure 6 is a top view of the middle joint type expansion device embodiment three.
[0030] 1, retractable panel; 11, retractable displacement hole; 12, retractable rib; 2, middle spacer; 3, water stop; 31, supporting plate; 32, drainage groove; 4, anchor; 41, mounting groove; 42, through rib hole; 5, angle steel folding plate; 51, first vertical section; 52, horizontal section; 53, second vertical section; 6, mounting gap; 7, stainless steel sliding plate. DETAILED DESCRIPTION
[0031] In order to make the purpose, technical scheme and advantages of the utility model clearer, the technical scheme of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope protected by the utility model.
[0032] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms 'center', 'length', 'width', 'height', 'upper', 'lower', 'front','rear', 'left', 'right','vertical', 'horizontal', 'top', 'bottom', 'inner', 'outer','side' and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In the description of the utility model, unless otherwise specified, the meaning of 'a plurality of' is two or more.
[0033] In the description of the utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms'set','mount', 'connected', 'connected' should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0034] The utility model embodiment provides a kind of middle joint type expansion joint and bridge expansion joint structure, can better satisfy the complex expansion deformation requirements of bridge, improve the overall structural strength, stability and waterproof performance.
[0035] The technical scheme provided by the utility model will be described in more detail below. Figures 1-6 The technical scheme provided by the utility model will be described in more detail below.
[0036] Embodiment 1:
[0037] The expansion joint device of the utility model provides, including anchor 4, expansion panel 1, middle gusset plate 2 and water stop 3, wherein: anchor 4 is fixed in the opposite sides of expansion panel 1, is used to be fixedly connected with the bridge body of expansion joint two sides;Expansion panel 1 is provided with expansion displacement hole 11, and all expansion displacement holes 11 are located in the middle position of expansion panel 1;Middle gusset plate 2, water stop 3 are all supported on anchor 4, and middle gusset plate 2 is clamped between water stop 3 and expansion panel 1 and is located at the bottom of expansion displacement hole 11, and water stop 3 is used for flow guide drainage;Anchor 4, expansion panel 1, middle gusset plate 2 and water stop 3 are all about the center of expansion joint and are of symmetrical structure.Stainless steel slide 7 is arranged between expansion panel 1 and middle gusset plate 2.
[0038] The expansion joint device of the utility model provides, when expansion deformation is generated to bridge structure due to temperature change, concrete shrinkage, vehicle load impact and other factors, expansion displacement hole 11 increases or reduces, provides space for expansion panel 1 expansion, can better satisfy the complex expansion deformation requirement of bridge, reduces the damage to bridge structure due to expansion limitation.
[0039] Expansion displacement hole 11 is located in the middle of expansion panel 1, that is, in the middle of bridge expansion joint, can be in the middle expansion deformation of bridge panel, evenly loads, improves the stability of structure.
[0040] Anchor 4, expansion panel 1, middle gusset plate 2 and water stop 3 are all about the center of expansion joint and are of symmetrical structure, improve the overall structural strength and stability, and the overall structure is symmetrically distributed, which facilitates even loading, prevents local stress concentration, prevents expansion panel 1 from being deformed and damaged when a vehicle passes, reduces maintenance frequency and cost, and improves bridge use safety and durability.
[0041] Anchor 4 enhances the connection reliability of expansion panel 1 and bridge, middle gusset plate 2 is located directly below expansion displacement hole 11, which improves the structural strength of expansion panel 1;Water stop 3 is located at the bottom of expansion panel 1 and is used for flow guide drainage, preventing rainwater and the like from penetrating into the bridge structure, greatly improving the waterproof and dirt prevention effects, and effectively prolonging the service life of the bridge.
[0042] As an optional embodiment, referring to Figures 1-6 , the number of expansion displacement holes 11 is multiple, and the expansion displacement holes 11 are arranged at intervals along the length direction and / or width direction of the expansion panel 1.
[0043] In the embodiment, referring to Figure 2 , Figure 4 and Figure 6As shown, the telescopic displacement holes 11 are arranged in two rows or more on the telescopic panel 1, the telescopic displacement holes 11 in each row are arranged at intervals along the width direction of the telescopic panel 1, the number of the telescopic displacement holes 11 in the same row is multiple, and all the telescopic displacement holes 11 in the same row are arranged at intervals along the length direction of the telescopic panel 1; the telescopic ribs 12 are formed between any two adjacent telescopic displacement holes 11 in the same row, and the telescopic ribs 12 in different rows are arranged at intervals along the length direction of the telescopic panel 1.
[0044] The telescopic displacement holes 11 and the telescopic ribs 12 are matched, the middle part of the telescopic panel 1 forms a grid structure, when the bridge structure is deformed due to the temperature change, the shrinkage of concrete, the impact of vehicle load and other factors, the telescopic displacement holes 11 are enlarged or reduced, and the telescopic ribs 12 are deformed, which provides a space for the telescopic panel 1 to expand or contract, and better meets the complex telescopic deformation requirements of the bridge, and reduces the damage to the bridge structure caused by the limited expansion.
[0045] Referring to Figure 2 , Figure 4 and Figure 6 , on the same side of the telescopic panel 1, the number of the anchoring members 4 is two or more, and all the anchoring members 4 are arranged at intervals along the length direction of the telescopic panel 1.
[0046] The anchoring members 4 are welded with the steel bars in the bridge body on both sides of the expansion joint, or are inserted into the concrete for fixation, and the above structure improves the stability of the telescopic device in the expansion joint, and prevents the telescopic panel 1 from being separated from the expansion joint of the bridge.
[0047] As an optional embodiment, referring to Figure 1 , Figure 3 and Figure 5 , the anchoring member 4 comprises an anchoring plate, the anchoring plate is provided with a steel bar penetrating hole 42 and a mounting groove 41, the inner side and the upper side of the mounting groove 41 facing the expansion joint are open sides, and the side part of the middle spacer plate 2 and the side part of the water stop belt 3 are inserted into the mounting groove 41 and arranged horizontally.
[0048] The anchoring member 4 with the above structure facilitates the installation of the water stop belt 3 and the middle spacer plate 2, and improves the structural strength.
[0049] As an optional embodiment, referring to Figure 1 , Figure 3 and Figure 5 , the water stop belt 3 comprises a supporting plate 31 and a drainage groove 32, wherein: two supporting plates 31 are fixedly connected to opposite sides of the drainage groove 32 respectively, the supporting plate 31 is horizontally arranged, the supporting plate 31 is supported in the mounting groove 41 and is fixedly connected with the middle spacer plate 2. The water stop belt 3 can be a stainless steel integrated plate, which improves the structural strength.
[0050] Specifically, the supporting plate 31 is sealingly fixedly connected with the middle sill plate 2, and a sealing gasket or the like can be arranged between the two to improve the stability of the structure and prevent a large amount of rainwater from penetrating.
[0051] As an optional embodiment, as shown in Figure 1 , Figure 3 and Figure 5 , the cross section of the drainage groove 32 is U-shaped, and the opening of the drainage groove 32 is arranged towards the expansion panel 1.
[0052] The structure of the drainage groove 32 can increase the water storage capacity on the one hand, and the end of the drainage groove 32 is in communication with the drainage pipe, so that drainage can be performed; on the other hand, the cross section of the drainage groove 32 is U-shaped, which can be pushed together or stretched according to the temperature change stress, that is, the width of the U-shaped structure changes, which can better adapt to the expansion and contraction of the expansion device.
[0053] As an optional embodiment, as shown in Figure 1 , the side wall of the mounting groove 41 and the side of the middle sill plate 2 and the side of the water stop belt 3 all have a mounting gap 6.
[0054] The above-mentioned mounting gap 6 leaves a margin for the expansion and contraction of the expansion panel 1, so as to prevent the middle sill plate 2 and the water stop belt 3 from affecting the expansion and contraction of the expansion panel 1.
[0055] As an optional embodiment, as shown in Figure 1 , Figure 3 and Figure 5 , the anchor 4 is fixedly provided with an angle steel folded plate 5, the angle steel folded plate 5 is in a bent plate structure, and at least part of the angle steel folded plate 5 is located in the mounting groove 41 and supports the side of the middle sill plate 2 and the side of the water stop belt 3.
[0056] The structure of the angle steel improves the structural strength of the anchor 4 and improves the supporting performance of the mounting groove 41 to the middle sill plate 2 and the water stop belt 3.
[0057] As an optional embodiment, as shown in Figure 3 , the angle steel folded plate 5 includes a first vertical section 51, a horizontal section 52 and a second vertical section 53, wherein: the first vertical section 51, the horizontal section 52 and the second vertical section 53 are integrally formed, the first vertical section 51 is attached to and fixed to the side wall of the mounting groove 41, the horizontal section 52 is attached to and fixed to the bottom wall of the mounting groove 41, and the second vertical section 53 is attached to and fixed to the inner side of the anchor 4.
[0058] The structure of the above-mentioned angle steel folded plate 5 can stably support the middle sill plate 2 and the water stop belt 3, and ensure that each side wall of the anchor 4 is attached, thereby improving the stability of the structure.
[0059] Example 2:
[0060] Referring to Figure 3 and Figure 4 As shown in the figure, the difference between the embodiment 2 and the embodiment 1 is that the number of rows of the telescopic displacement holes 11 is different.
[0061] Embodiment 3:
[0062] Referring to Figure 5 and Figure 6 As shown in the figure, the difference between the embodiment 3 and the embodiment 1 is that the number of rows of the telescopic displacement holes 11 is different.
[0063] Specifically, the number of the telescopic displacement holes 11 is selected according to the width of the expansion joint on the bridge.
[0064] Embodiment 4:
[0065] The embodiment provides a bridge expansion joint structure, which comprises an expansion joint and the above-mentioned joint-type expansion device located in the expansion joint.
[0066] The bridge expansion joint structure of the embodiment can better meet various complex expansion deformation requirements of the bridge by installing the above-mentioned joint-type expansion device in the expansion joint, and improves the overall structural strength, stability and waterproof performance.
[0067] In the description of the specification, specific features, structures or characteristics can be combined in any one or more embodiments or examples in a suitable manner.
[0068] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the description of the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.
[0069] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the technical field can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.
Claims
1. A center joint expansion device characterized by, The device comprises an anchor, a stretchable panel, a middle pad and a water stop belt, wherein: The anchor is fixed on opposite sides of the stretchable panel to be fixedly connected with the bridge on both sides of the expansion joint; the stretchable panel is provided with stretchable displacement holes, all of which are located in the middle part of the stretchable panel; The middle pad and the water stop belt are supported on the anchor, the middle pad is clamped between the water stop belt and the stretchable panel and located at the bottom of the stretchable displacement hole, and a stainless steel sliding plate is arranged between the stretchable panel and the middle pad; The water stop belt is used for guiding flow and draining water; the anchor, the stretchable panel, the middle pad and the water stop belt are symmetrically arranged about the center of the expansion joint.
2. The center-pivot retractor of claim 1, wherein, The number of the stretchable displacement holes is multiple, and the stretchable displacement holes are arranged in the length direction and / or the width direction of the stretchable panel.
3. The center-pinch expansion device of claim 1, wherein, The anchor comprises an anchor plate, the anchor plate is provided with a through-hole and a mounting groove, the inner side and the upper side of the mounting groove facing the expansion joint are open sides, and the side of the middle pad and the side of the water stop belt extend into the mounting groove and are arranged horizontally.
4. The center-pinch expansion device of claim 3, wherein, The water stop belt comprises a supporting plate and a drainage groove, wherein: The two supporting plates are fixedly connected to opposite sides of the drainage groove, the supporting plates are horizontally arranged, the supporting plates are supported in the mounting groove and fixedly connected with the middle pad.
5. The center-pinch expansion device of claim 4, wherein, The cross section of the drainage groove is U-shaped, and the groove opening of the drainage groove faces the stretchable panel.
6. The center-pinch expansion device of claim 4, wherein, There is a mounting gap between the side wall of the mounting groove and the side of the middle pad and the side of the water stop belt.
7. The center-pinch expansion device of claim 3, wherein The anchor is fixedly provided with an angle steel fold plate, the angle steel fold plate is a bent plate structure, the lower part of the angle steel fold plate is welded with the anchor plate, and the side of the middle pad and the side of the water stop belt are supported.
8. The center-pinch expansion device of claim 7, wherein, The angle steel fold plate comprises a first vertical section, a horizontal section and a second vertical section, wherein: The first vertical section, the horizontal section and the second vertical section are integrally formed, the first vertical section is attached to and fixed to the side wall of the mounting groove, the horizontal section is attached to and fixed to the bottom wall of the mounting groove, and the second vertical section is attached to and fixed to the inner side of the anchor.
9. The center-pinch expansion device of claim 1, wherein, The stretchable displacement holes on the stretchable panel are arranged in two or more rows, the stretchable displacement holes in each row are arranged in the width direction of the stretchable panel, the number of the stretchable displacement holes in the same row is multiple, and all the stretchable displacement holes in the same row are arranged in the length direction of the stretchable panel; Adjacent two stretchable displacement holes in the same row form a stretchable rib, and the stretchable ribs in different rows are arranged in the length direction of the stretchable panel.
10. A bridge expansion joint structure, characterized by, The device comprises an expansion joint and a middle joint type expansion device as claimed in any one of claims 1-9 arranged in the expansion joint.