CN114960414A - Modulus formula bridge telescoping device - Google Patents
Modulus formula bridge telescoping device Download PDFInfo
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- CN114960414A CN114960414A CN202210691536.7A CN202210691536A CN114960414A CN 114960414 A CN114960414 A CN 114960414A CN 202210691536 A CN202210691536 A CN 202210691536A CN 114960414 A CN114960414 A CN 114960414A
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- 239000004033 plastic Substances 0.000 claims abstract description 74
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 50
- 239000010959 steel Substances 0.000 claims abstract description 50
- 239000004575 stone Substances 0.000 claims description 44
- 229920001971 elastomer Polymers 0.000 claims description 32
- 238000003466 welding Methods 0.000 claims description 15
- 230000002265 prevention Effects 0.000 claims description 11
- 238000004873 anchoring Methods 0.000 claims description 10
- 239000004744 fabric Substances 0.000 claims description 9
- 210000003205 muscle Anatomy 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 230000001154 acute effect Effects 0.000 claims description 3
- 239000013013 elastic material Substances 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 238000011900 installation process Methods 0.000 abstract description 2
- 239000000806 elastomer Substances 0.000 description 25
- 230000008859 change Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- 230000008602 contraction Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 244000126211 Hericium coralloides Species 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000010426 asphalt Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004078 waterproofing Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000746 body region Anatomy 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- -1 for example Substances 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/06—Arrangement, construction or bridging of expansion joints
- E01D19/065—Joints having sliding plates
Abstract
A modulus type bridge expansion device is characterized in that a rectangular cover plate which is as high as a bridge deck pavement is welded at the top end of a side beam on one side, an elastic-plastic body is arranged between the side beams on two sides of a cross joint and consists of one group or multiple groups of elastic-plastic body modules with equal heights which are longitudinally and sequentially arranged, an I-shaped steel main body beam is arranged between the elastic-plastic body modules, an angle is formed between an elastic-plastic body steel plate and the main body beam, a first side end of the elastic-plastic body is welded with the first side beam, and the last group of elastic-plastic body is not fixedly connected with the rectangular cover plate; and an anti-stone-blocking component is laid above the elastic-plastic body. The invention avoids the problem of deformation of the connecting parts caused by the fact that the bridge beam joints stretch in all directions, and avoids the problems of road surface blocking and bridge water leakage. And the whole structure and the installation process are simpler and quicker.
Description
Technical Field
The invention relates to bridge construction, in particular to a modulus type bridge expansion device.
Background
The bridge beam seam is a waterproof and adaptive telescopic paving surface which is required to be arranged at the expansion joint when the bridge deck is paved for adapting to the contraction and expansion setting, and can adapt to the longitudinal and transverse contraction and expansion size change. The expansion device used at present has the outstanding problem of water and stone blockage prevention of the maylor expansion device, and even if the comb-tooth-shaped expansion device is provided with a steel elastic body, the structure is more complex, and the large-sized bridge expansion device is still likely to cause the arch of the bridge deck or damage to a connecting part when the two sides of the expansion joint generate relative movement in the vertical direction in many years of practice. And the phenomenon of stone blocking prevention at the bridge beam joint is difficult to stop without using a steel elastic body. Because the end face is stressed by thermal expansion deformation only in one direction, the deformation is difficult to control and calculate. The prior art is difficult to perfectly solve the problems of no deformation of a telescopic part and water and stone blockage prevention.
Disclosure of Invention
The technical problem to be solved by the invention is to solve the above problems, and provide a modular bridge expansion device, which avoids many defects of a capillary expansion device and complex structure of a comb-tooth expansion device, so that the surface of a bridge expansion joint is flat and beautiful, and bridge bodies at two sides are not affected by vertical relative displacement of the bridge bodies at two sides of the expansion joint when deforming, and simultaneously play roles of anti-blocking and water-proof at the expansion joint.
In order to achieve the purpose, the invention adopts the following technical scheme:
modulus formula bridge telescoping device, in bridge beam seam's both sides abutment/roof beam body top through pre-buried in abutment/roof beam body and the anchor muscle fixedly connected with that stretches out two for bridge beam seam central plane symmetry and with the perpendicular anchor board of putting of bridge beam seam central plane vertically, the anchor board front end of bridge beam seam both sides respectively with the first boundary beam or the welding of second boundary beam of bridge beam seam this side, first boundary beam and second boundary beam are located the both sides of bridge beam seam respectively and all are parallel with bridge beam seam central plane, its characterized in that:
the top end of the second side beam is welded with a rectangular cover plate with the same height as the bridge deck pavement, an elastic plastic body is arranged between the first side beam and the second side beam, the elastic plastic body is longitudinally formed by sequentially fixedly connecting one or more groups of elastic plastic body modules with the same height, one group of elastic plastic body modules consists of a pair of vertically arranged elastic plastic body main steel plates which are welded into a whole, an included angle is formed between the pair of elastic plastic body main steel plates, the adjacent side ends of the pair of elastic plastic body main steel plates are welded with each other, the pair of elastic plastic body main steel plates of one group of elastic plastic body modules are symmetrically arranged, and the first side end of the elastic plastic body is welded with the first side beam.
As the embodiment, the welding has the well web of vertical setting between a pair of elastoplastomer main part steel sheet of a set of elastoplastomer module, well web is parallel with bridge beam gap central plane, and the both sides face of well web all welds with a pair of elastoplastomer main part steel sheet, and the bottom surface of well web is placed on the bracket, bracket and pre-buried in abutment/roof beam body and the anchor muscle fixed connection who stretches out, the second side of elastoplastomer be unsettled free end, with second boundary beam swing joint or with the second boundary beam through the spacing of limiting plate of third party establish be connected.
In another embodiment, a middle beam web plate is vertically arranged between the adjacent groups of the elastoplast modules, the middle beam web plate is parallel to the central plane of the bridge beam joint, two side surfaces of the middle beam web plate are welded with the adjacent groups of the elastoplast modules, the bottom surface of the middle beam web plate is placed on a bracket, and the bracket is fixedly connected with an anchoring rib which is embedded in the bridge abutment/beam body and extends out.
As an embodiment, both sides of the main steel plate of the elastic plastic body are provided with folded edges parallel to the central plane of the bridge beam seam, the main steel plate of the elastic plastic body is welded by the folded edges, the folded edges of the elastic plastic body adjacent to the second side beam end are embedded between the outer side of the limiting plate and the second side beam, the limiting plate is parallel to the central plane of the bridge beam seam, and the top edge is welded with the cover plate.
As an optimal scheme, a spring frame is laid on the elastic plastic body between the first boundary beam and the adjacent middle beam web plate without being fixed with the elastic plastic body and the middle beam web plate, the spring frame comprises spring ribs and a connecting plate welded with one ends of the spring ribs, an included angle between each spring rib and the connecting plate is an acute angle, the other ends of the spring ribs are welded with the first boundary beam, and a fixing plate and a rubber plate are sequentially and non-fixedly placed above the spring frame.
Furthermore, the lower portions of the first boundary beam and the second boundary beam are respectively fixedly provided with a template with the abutment/beam body at the adjacent side, the upper ends of the templates at the two sides are respectively higher than the lower ends of the first boundary beam and the second boundary beam and are respectively longitudinally staggered with the lower ends of the first boundary beam and the second boundary beam, waterproof cloth is arranged between the lower ends of the first boundary beam and the second boundary beam in a transverse multiple-fold mode, the waterproof cloth penetrates through the gaps between the templates and the first boundary beam and between the templates and the second boundary beam at the two sides respectively, the outer sides of the first boundary beam and the second boundary beam are sequentially fixedly connected with the penetrating and hanging ribs, and the penetrating and hanging ribs are fixed with the positioning anchor plate through the anchoring ribs.
Furthermore, an anti-stone-clamping component is laid between the top end of the elastic-plastic body and the cover plate in an unfixed manner.
The middle beam web plate is provided with a horizontal upper wing plate on the upper side edge, and anti-stone clamping components are respectively paved between the upper wing plate on one side or two sides of the middle beam web plate and the elastic plastic body.
When a gap appears below the upper wing plate, the stone blocking prevention component comprises a filling plate filled below the upper wing plate.
As an embodiment, the anti-blocking stone member sequentially comprises a base plate, a filling block and a panel from bottom to top, wherein the width of the base plate exceeds the width of a bridge beam seam, and the filling block is made of an elastic material.
The invention is completely different from the new structure of the expansion device of the capillary expansion device and the bridge comb cover plate, avoids the defects of the expansion device of the capillary expansion device and the expansion device of the bridge comb cover plate, avoids the deformation problem of a connecting part possibly caused by the expansion of bridge beam joints in all directions, and avoids the problems of road surface blocking stones and bridge water leakage. And the whole structure and the installation process are simpler and quicker.
The invention realizes that the middle-large bridge beam seam expansion device adapts to the all-directional change of the bridge beam seam through the elastic plastic body at the bridge beam seam under the conditions of transverse expansion, longitudinal expansion and vertical expansion, eliminates the stress accumulation caused by the shrinkage and expansion change of all directions, particularly the vertical expansion of the bridge beam seam, simultaneously gives consideration to the smooth bridge surface at the bridge beam seam, avoids the phenomenon of stone blocking and prevents water leakage from the beam seam to the lower part.
The invention discloses an elastic-plastic body structure scheme, an anti-blocking stone shielding scheme and a waterproof scheme under telescopic devices of different specifications through specific embodiments, for a multi-group elastic-plastic body series connection scheme of large bridge span joints, stable position and direction series connection of elastic-plastic bodies is realized through a middle beam web plate, and meanwhile, net-shaped arrangement among bridge beam joints is completed through the elastic-plastic bodies connected in series, so that the net-shaped arrangement serves as a foundation of an anti-blocking stone mechanism above the elastic-plastic bodies, the anti-blocking stone mechanism synchronously realizes absorption adaptation to pressure in various directions through an erected elastic filling block, and due to the smoothness of the top surface of the anti-blocking stone mechanism, the smoothness of a road surface can be ensured and the stone blocking phenomenon can be avoided by filling elastic-plastic substances on the top surface of the anti-blocking stone mechanism, and the specific description is specifically provided through the embodiments and the attached drawings, and the strength, the reliability, the flexibility and the performance convenient to realize are considered.
Drawings
Figure 1 is a top plan schematic view of an embodiment of the present invention,
FIG. 2 is a longitudinal sectional view showing a structure of an installation state of a small bridge expansion device,
figure 3 is a cross-sectional view a-a of the elastomer mounting of figure 2,
figure 4 is a longitudinal section structure view of the anti-stuck stone member of the small bridge expansion device,
figure 5 is a longitudinal section structure view of an embodiment of the waterproof structure of the bridge expansion device,
FIG. 6 is a longitudinal sectional view illustrating the structure of an installation example of the middle bridge girder stretching and retracting device of the present invention,
figure 7 is a cross-sectional view of the elastomer in figure 6 in the mounted state B-B,
figure 8 is a longitudinal sectional view of an installation embodiment of the telescopic device for a large bridge according to the present invention,
figure 9 is a cross-sectional view of the elastomer in figure 8 in the installed state C-C,
figure 10 is a longitudinal section structure view of the anti-stuck stone member of the expansion device of the medium and large bridge,
fig. 11 is a top view of the spring cage or mounting structure of fig. 10.
In the figure: 1-bridge deck pavement, 2-concrete band area, 3-anti-cracking steel bar net, 4-positioning anchor plate, 5-anchoring steel bar, 6-first boundary beam, 8-second boundary beam, 9-cover plate, 10-elastic plastic body, 11-bridge beam gap, 12-bridge abutment/beam body, 13-waterproof member, 14-anti-blocking stone member, 15-middle beam web plate, 16-bracket, 17-supporting plate, 18-limiting plate, 19-backing plate, 20-filling block, 21-panel, 22-filling plate, 23-fixing plate, 24-rubber plate, 25-spring frame, 26-waterproof cloth, 27-template, 28-anchoring bar, 29-penetrating hanging bar, 30-spring bar, 31-connecting plate, 32-bridge beam gap central plane, 33-elastic plastic body main steel plate, 34-upper wing plate and 35-folded edge.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples, it being understood that the examples described are only some of the examples and are not intended to limit the invention to the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "inside", "outside", "longitudinal", "vertical", "transverse", "vertical" or "horizontal" and the like indicate positional relationships or positional relationships based on application states, and are used only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have specific relative orientations, be constructed and operated in specific orientations, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or may be connected internally to the elements. "fixedly connected" means a solution which can be realized by a fixing means of the prior art, such as riveting, welding, bolting, etc., and a person of ordinary skill in the art can understand the specific meaning of the above terms in the present invention in specific cases.
The modulus type bridge expansion device is shown in fig. 2, 6 and 8, in the prior art, the anchor bars 5 can be embedded in the bridge abutment/beam body 12 on two sides of the bridge beam seam 11, the anchor bars 5 extend out of the bridge abutment/beam body 12, the anchor plates 8 are fixedly welded with the anchor bars 5, the two rows of the anchor plates 8 are arranged on two sides of the bridge beam seam 11, the anchor plates 8 are vertically arranged, namely are perpendicular to the horizontal plane, and are symmetrical relative to the bridge beam seam central plane 32 and perpendicular to the bridge beam seam central plane 32. The vertical sides of the front ends of the anchor plates 8 on the two sides of the bridge beam seam 21 are respectively welded with the first side beam 6 or the second side beam 8, the first side beam 6 and the second side beam 8 are respectively positioned on the two sides of the bridge beam seam 11 and are parallel to the central plane 32 of the bridge beam seam, and the cover plate 9 is welded at the top end of the first side beam 6 or the second side beam 8. The first side beam 6 and the second side beam 8 are generally referred to as a side, and the connected connecting parts need to be specifically selected and applied according to actual conditions. The cover plate 9 welded on the top surface is a flat steel plate instead of a comb plate, so that the road surface of the seam crossing part is flat and attractive. And the use of the cover plate 9 is based on the following elastoplast structure.
An elastic-plastic body 10 is arranged between the first side beam 6 and the second side beam 8, namely the elastic-plastic body 10 is arranged above the bridge beam seam 11, and the two sides of the elastic-plastic body are respectively provided with the side beams fixed with the abutment/beam body 12 at the two sides of the bridge beam seam 11. When the first side beam 6 and the second side beam 8 are close to each other due to the contraction and expansion of the bridge beam seam, namely the bridge beam seam 11 expands and narrows under the action of the internal stress of the abutment/beam body 12, and extrudes the elastic plastic body 10; when the distance between the first and second side members 6, 8 is pulled apart, the elastomer body 10 remains completely filled between the first and second side members 6, 8.
The elastic-plastic body 10 is formed by sequentially connecting one or more groups of elastic-plastic body modules at equal heights, and besides longitudinal elastic-plastic body modules, one or more groups of elastic-plastic body modules are arranged transversely of the bridge beam seam 11 to form a net structure between the bridge beam seams. As shown in fig. 3, each group of the elastomer modules is composed of a pair of symmetrically welded and vertically arranged elastomer main steel plates 33, and as an example, the included angle between two elastomer main steel plates 33 is 20 to 60 °, and the included angle may vary in a large range due to the expansion and contraction deformation. In an ideal state, a symmetrical plane between the two elastic plastic body main body steel plates 33 is parallel to a bridge beam seam central plane 32, and the bridge beam seam central plane 32 is an ideal plane perpendicular to a horizontal plane and a bridge pavement and is positioned in the center of the bridge beam seam. One side end of each pair of the elastomer body steel plates 33 is directly or indirectly welded with each other, and a small gap, for example, the distance between a pair of side beams is less than 120mm, as shown in fig. 2, a single group of elastomer bodies 10 can be longitudinally used, and two ends of the single group of elastomer bodies can be respectively welded with the first side beam 6 and the second side beam 8. For medium and large sized joints, for example, where the distance between a pair of side beams is greater than 160mm, a plurality of sets of elastomer modules are used longitudinally, and the outer ends of adjacent elastomer body main steel plates 33 are welded directly or indirectly to each other. The body 10 that moulds of bullet only first side and the welding of first boundary beam 6, another side is the second side, then the second boundary beam 8 is pressed close to the second side, the second side is unsettled free end, with second boundary beam 8 swing joint or with second boundary beam 8 through the spacing establishing connection of inlaying of limiting plate 18 of third party, when initial erection, be connected with second boundary beam 8 spot welding for the convenience of transportation second side, can preferentially separate spot welding connection when the vertical shearing force that the welding point received is close to the stress that the part warp, change swing joint or unsettled state into, avoid the part to warp. The elastoplast 10 is placed on the underlying waterproofing member 13 or bracket 16, the bracket 16 being welded to the abutment/beam 12 by the anchoring bars 5. The body 10 is movable relative to the carrier 16. The waterproofing member 13 is fixedly connected to the abutment/girder 12.
Regarding the center sill, vertically arranged between the first side sill 6 and the second side sill 8, as shown in fig. 6 and 8, the center sill structure is formed by integrating a center sill web 15 and wing plates at two ends, the center sill web 15 is vertically arranged and parallel to a central plane 32 of a bridge beam seam, the wing plates are vertically fixed at two ends of the center sill web 15, the cross section of the center sill is in an i-steel shape, the wing plates at the lower end are placed on the bracket 16, and the upper surfaces of the wing plates at the upper end are flush with the height of a bridge deck and serve as a part of bridge deck pavement. Meanwhile, the upper wing plate can also be used for limiting the stone-blocking-preventing component 14 below the upper wing plate and above the elastic-plastic body 10, so that the stone-blocking-preventing component 14 is limited to be separated from the bridge deck; the lower wing plate can be used as a seat for the center sill.
An embodiment of the structure of the elastic plastic body is shown in fig. 7, a central beam web 15 is welded between a pair of elastic plastic body main steel plates 33 of a group of elastic plastic body modules, two side surfaces of the central beam web 15 are respectively welded with one elastic plastic body main steel plate 33, the central beam web 15 is parallel to a central plane 32 of a bridge beam seam, the pair of elastic plastic body main steel plates 33 are symmetrical relative to the central beam web 15, the bottom surface of the central beam web 15 is placed on a bracket 16, and the bracket 16 is fixedly connected with an anchoring rib 5 which is embedded in a bridge abutment/beam body 12 and extends out.
In another embodiment, as shown in fig. 9, a middle beam web 15 is vertically arranged between adjacent groups of the elastoplast modules, the middle beam web 15 is parallel to a central plane 32 of a bridge beam joint, two side surfaces of the middle beam web 15 are welded to the adjacent groups of the elastoplast modules, the bottom surface of the middle beam web 15 is placed on a bracket 16, and the bracket 16 is fixedly connected with an anchoring rib 5 which is embedded in the abutment/beam 12 and extends out. In fig. 9, a pair of elastomer body steel plates 33 of a set of elastomer modules are welded directly to each other, and the elastomer body steel plate 33 on one side is welded to the center sill web 15. The other side of the middle beam web 15 is welded with the side end of the elastic-plastic body module of the other group.
In the above embodiment, the center sill serves to stabilize the elastoplast body 10, and particularly in a large bridge span, the networked elastoplast body is prevented from deflecting.
Generally, as shown in fig. 3, 7 and 9, the elastic plastic body main steel plate 33 is provided with folded edges 35 at both side ends thereof, which are parallel to the bridge beam seam center plane 32, and the elastic plastic body main steel plate 33 is welded by the folded edges 35. At the second side end of the elastic plastic body, as shown in fig. 9 and 10, the folded edge 35 of the second side end of the elastic plastic body 10 is embedded between the limiting plate 18 and the second boundary beam 8 without being fixedly connected, the limiting plate 18 is parallel to the central plane 32 of the bridge beam seam, and the top edge is welded to the cover plate 9.
For the anti-blocking stone component, which is used for preventing blocking stone on the bridge floor, the comb tooth cover plate of the maylor expansion device or the comb tooth expansion device in the prior art has the possibility of blocking stone and blocking wheels.
The stone-blocking prevention device is arranged between the top end of the elastic-plastic body 10 and the cover plate 9, and because a middle beam is used in a bridge beam seam of a medium-large scale expansion device, and the cover plate is not arranged at the top of the first side beam 6, the stone-blocking prevention device has different structures and will be introduced in different expansion device embodiments. The anti-blocking stone members are arranged between the elastic plastic body and the cover plate which are separated by the middle beam web, as shown in figures 6, 8 and 10, and the small bridge beam seams 11 without the middle beam web are directly provided with the anti-blocking stone members 14, as shown in figures 2 and 4. The anti-blocking stone component 14 sequentially comprises a base plate 19, a filling block 20 and a panel 21 from bottom to top, wherein the width of the base plate exceeds the width of the bridge beam seam 11, the filling block 20 is made of elastic materials, for example, foam plates with telescopic characteristics are used, the filling block can bear vertical compression stress, can adapt to the change of the distance between the elastic plastic body 10 and the cover plate 9 in a height-variable mode, and reduces the whole weight.
For the water leakage preventing device, it is necessary to prevent water leakage from the water flow of the bridge deck from leaking to the lower side of the bridge gap, especially the viaduct provided on the ground.
The structure of the water leakage preventing device is as shown in figure 5, a template 27 is respectively fixed under the first side beam 6 and the second side beam 8 and adjacent bridge abutment/beam body 12, the upper ends of the templates 27 at two sides of the bridge beam seam are respectively higher than the lower ends of the first side beam 6 and the second side beam 8 and are respectively arranged at the inner sides of the lower ends of the first side beam 6 and the second side beam 8 in a staggered way, a waterproof cloth 26 with multiple folds is transversely arranged between the lower ends of the first side beam 6 and the second side beam 8 so as to have enough stretching amount, the waterproof cloth 26 respectively passes through the template 27 and the first side beam 6 and between the template 27 and the second side beam 8 to the outer sides of the first side beam 6 and the second side beam 8 at two sides, the waterproof cloth 26 at the outer sides of the first side beam 6 and the second side beam 8 is respectively fixedly connected with a penetrating hanging rib 29, the penetrating hanging rib 29 is fixedly arranged under the positioning anchor plate 4 and is parallel to the bridge seam central plane 32, the through hanging rib 29 is fixed with the positioning anchor plate 4 through the anchoring rib 28. Preferably, the double-layer waterproof cloth 26 is used, so that the bridge beam joints are completely covered, and the expansion amount of the bridge beam joints is reserved.
The following embodiments of the bridge expansion device are specifically described in the following, respectively, in terms of small, medium and large bridge expansion devices:
fig. 2, 3 and 4 show application examples of the small bridge expansion device applied to a small bridge.
Among the small-size bridge telescoping device, the interval between first boundary beam 6 and the second boundary beam 8 is not more than 120mm, vertically use a set of steel projectile body module can, look the width transversely can 2 groups or multiunit steel projectile body modules. The top of the first boundary beam 6 and the second boundary beam 8 of the fixed 2 groups is fixed with a cover plate 9, the top surface of the cover plate 9 is flush with the bridge floor, and the first boundary beam and the second boundary beam simultaneously play a role in blocking concrete in a concrete casting belt region from flowing to an elastoplast body region. As shown in fig. 3, the first side end of a group of steel elastomer modules is welded with the first side beam 6, the small bridge expansion device has small shrinkage and expansion deformation, the vertical relative displacement can be ignored, the second side end is welded with the second side beam 8 more stably, and two elastomer main body steel plates 33 of the steel elastomer modules are symmetrically arranged and then are directly welded at the approach end. The structure of the anti-blocking stone component 14 of the small bridge expansion device is simple, as shown in fig. 4, because the cover plates 9 are fixed on the tops of the first side beam 6 and the second side beam 8, the anti-blocking stone component 14 is directly filled between the elastic plastic body 10 and the pair of cover plates 9, the width of the anti-blocking stone component 14 is larger than the distance between the pair of cover plates 9, and the anti-blocking stone component does not need to be fixed. The anti-blocking stone component 14 is formed by sequentially laying a backing plate 19, a filling block 20 and a panel 21 from bottom to top, the whole body is blocked and pressed between the elastic plastic body 10 and the pair of cover plates 9, and due to the elastic characteristic of the filling block 20, the anti-blocking stone component 14 can bear and adapt to vertical pressure and deformation without damaging related components. A flexible deformable chemical material (such as asphalt) may be filled above the stone blocking prevention member 14 between the pair of cover plates 9 to keep the road surface flat and to accommodate variations in the spacing between the pair of cover plates 9. The waterproof member 13 is provided under the elastic/plastic body 10 to prevent water leakage.
Fig. 6, 7, 8 and 9 correspond to application embodiments of the medium-large bridge expansion device used in medium-large bridges.
In the middle and large bridge expansion device, the distance between the first side beam 6 and the second side beam 8 is larger than 120mm, two or more groups of steel elastomer modules are sequentially connected in equal height in the longitudinal direction, and two or more groups of steel elastomer modules are transversely arranged to form a net structure. Only the top of the second boundary beam 8 is fixed with a cover plate 9, the top surface of the cover plate 9 is flush with the bridge deck, the top of the first boundary beam is not fixedly provided with the cover plate, but is equal to the wing plates of the middle beams arranged at intervals, the bridge deck serving as the area is filled with the anti-blocking stone members 14 in the intervals with the wing plates, and deformable chemical materials such as asphalt and the like are filled above the anti-blocking stone members 14, so that the phenomenon of blocking stone and blocking wheels is fundamentally avoided.
The first boundary beam and the second boundary beam simultaneously play a role in blocking concrete in a concrete casting belt area from flowing to the elastoplast body area. The first side beam 6 itself has no fixed cover plate, correspondingly, the elastoplast welded with the first side beam 6 is different from other positions, as shown in fig. 7, in the first side beam 6, a middle beam web 15 is welded at one side end and the other side end of the elastoplast main steel plate 33 welded with the first side beam 6, a group of steel elastomer modules are welded on the back side surface of the middle beam web 15, then a plurality of groups of steel elastomer modules are welded in sequence, the middle beam web 15 is welded among the plurality of groups of steel elastomer modules, the middle beam web 15 is parallel to the bridge beam seam central plane 32, and the directions of the steel elastomer modules are kept consistent. Therefore, the distance between the first side beam 6 and the adjacent middle beam web 15 is half of the distance between the two adjacent middle beam webs 15, the width of the stone-blocking prevention member 14 above the first side beam 6 is also half of the width of the stone-blocking prevention member 14 above the two adjacent middle beam webs 15, and generally, the width of the wing plate of the half side of the middle beam web 15 adjacent to the first side beam 6 is larger than the distance from the first side beam 6 to the adjacent wing plate, so that the wing plate adjacent to the first side beam 6 is beneficial to stably limiting the stone-blocking prevention member 14 with the length of the wing plate.
Furthermore, the anti-blocking stone members 14 adjacent to the first side beam are different from the anti-blocking stone members at other positions, as shown in fig. 10, a spring bracket 25 is laid above the elastic plastic body 10 between the first side beam 6 and the adjacent middle beam web 15, and the spring bracket 25 is not fixed with the elastic plastic body and the middle beam web, but only welded with the first side beam. The structure of the spring frame 25 is shown in fig. 11, and comprises a spring rib 30 and a connecting plate 31 welded with one end of the spring rib 30, an included angle between the spring rib 30 and the connecting plate 31 is an acute angle, for example, the original state is 3 degrees to 6 degrees, the outer end of the spring rib 30 is welded with the first side beam 6, and a fixing plate 23 and a rubber plate 24 are sequentially arranged above the spring frame 25. The arrangement of the spring ribs 30 is such that the spring bracket 25 fills the space between the first edge beam 6 and the adjacent centre sill web 15, and is stable irrespective of changes in the expansion and contraction of the space. The rubber plate 24 is paved on the longitudinal interval from the first edge beam to the wing plate and is inserted below the wing plate, and the rubber plate 24 is made of rubber and has elasticity, so that vertical pressure change can be used.
The width of the anti-entrapment elements laid over the elastoplast body 10 between adjacent centre sill webs 15 is greater than the spacing between adjacent flanges and does not require fixings. The stone-blocking-proof component 14 is formed by sequentially laying a backing plate 19, a filling block 20 and a panel 21 from bottom to top, and is integrally blocked and compressed between the elastic plastic body 10 and the pair of cover plates 9, and due to the elastic characteristic of the filling block 20, the stone-blocking-proof component 14 can bear and adapt to vertical pressure and deformation without damaging related parts.
The width of the anti-blocking stone member laid above the elastic plastic body between the middle beam web close to the second boundary beam and the second boundary beam 8 and between the middle beam web and the limiting plate 18 is larger than the distance between the cover plate 9 and the adjacent wing plate, and the anti-blocking stone member does not need to be fixed. The anti-blocking stone component 14 is formed by sequentially laying a backing plate 19, a filling block 20 and a panel 21 from bottom to top, the whole body is blocked and pressed between the elastic plastic body 10 and the pair of cover plates 9, and due to the elastic characteristic of the filling block 20, the anti-blocking stone component 14 can bear and adapt to vertical pressure and deformation without damaging related components. Since the thickness of the cover plate 9 is greater than the thickness of the wing plate and there is a space below the wing plate adjacent to the second edge beam, a caulking plate 22 is welded below the corresponding wing plate, and the caulking plate 22 has a thickness equivalent to the thickness of the wing plate and the cover plate 9.
The second side end of the elastomer body 10 is not connected or movably connected with the second side beam 8. Years of actual installation practice show that the vertical relative displacement of the medium-large expansion device cannot be ignored, so that the elastoplastics at the second boundary beam are only subjected to spot welding so as to facilitate transportation and stabilize the installation state, or the elastoplastics at the second boundary beam are suspended or movably connected. The spot welding can be separated from welding before the part is deformed under the stress, so that the internal stress is eliminated.
The connection structure of the second side end of the elastic plastic body 10 and the second side beam 8 is shown in fig. 9 and 10, the two side ends of the steel plate 33 of the main body of the elastic plastic body are provided with folded edges 35 parallel to the central plane 32 of the bridge beam seam, the folded edges 35 of the second side end of the elastic plastic body 10 are embedded between the limiting plate 18 and the second side beam 8 in a non-fixed connection mode, the limiting plate 18 is arranged in parallel to the central plane 32 of the bridge beam seam, and the top edge is welded with the cover plate 9.
The waterproof member 13 prevents water from leaking from the lower part of the elastic/plastic body 10.
During installation construction, a bracket 16 and a template 27 are fixedly erected, a positioning anchor plate 4 and a boundary beam are placed and fixedly installed, a waterproof component 13 is installed, then a middle beam is placed on the bracket 16 in an aligned mode, a steel elastic body module is installed between the middle beams or between the middle beams and the boundary beam, then an anti-blocking stone component 14 is inserted above an elastic plastic body and below a wing plate, a concrete belt 2 is poured and cured, and then a road surface gap above the anti-blocking stone component 14 is filled with flexible or elastic chemical materials.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a modulus formula bridge telescoping device, through embedding in abutment/roof beam body and the anchor muscle (5) fixedly connected with that stretch out in abutment/roof beam body (12) top of both sides of bridge beam seam (11) two for bridge beam seam central plane (32) symmetry and with bridge beam seam central plane (32) vertically anchor board (8) put, the anchor board (8) front end of bridge beam seam (21) both sides respectively with first boundary beam (6) or the welding of second boundary beam (8) of bridge beam seam this side, first boundary beam (6) and second boundary beam (8) are located the both sides of bridge beam seam (11) respectively and all are parallel with bridge beam seam central plane (32), its characterized in that:
the top end of the second side beam (8) is welded with a rectangular cover plate (9) which has the same height as the bridge deck pavement (1), an elastoplast body (10) is arranged between the first side beam (6) and the second side beam (8), the elastoplast body (10) is longitudinally formed by sequentially fixedly connecting one or more groups of elastoplast body modules at the same height, one group of elastoplast body modules is formed by a pair of vertically arranged elastoplast body main steel plates (33) which are welded into a whole, an included angle is formed between the pair of elastoplast body main steel plates (33) and the adjacent side ends are welded with each other, the pair of elastoplast body main steel plates (33) of one group of elastoplast body modules are symmetrically arranged, and the first side end of the elastoplast body (10) is welded with the first side beam (6).
2. The modular bridge expansion device of claim 1, wherein: the welding has well web (15) of vertical setting between a pair of elastoplasty body main part steel sheet (33) of a set of elastoplasty body module, well web (15) are parallel with bridge beam seam central plane (32), and the both sides face of well web (15) all welds with a pair of elastoplasty body main part steel sheet (33), and place on bracket (16) the bottom surface of well web (15), bracket (16) and pre-buried anchor muscle (5) fixed connection in abutment/roof beam body (12) and stretching out, the second side of elastoplasty body (10) is unsettled free end, establish the connection through spacing the inlaying of limiting plate (18) of third party with second boundary beam (8) swing joint or with second boundary beam (8).
3. The modular bridge expansion device of claim 1, wherein: the vertical middle beam web plates (15) are arranged between the adjacent groups of the elastic-plastic body modules, the middle beam web plates (15) are parallel to a bridge beam seam central plane (32), two side surfaces of the middle beam web plates (15) are welded with the adjacent groups of the elastic-plastic body modules, the bottom surfaces of the middle beam web plates (15) are placed on the brackets (16), and the brackets (16) are fixedly connected with the anchoring ribs (5) which are embedded in the bridge abutment/beam body (12) and extend out.
4. The modular bridge expansion device of claim 3, wherein: the both sides end of elastoplast body main part steel sheet (33) is equipped with hem (35) parallel with bridge beam seam midplane (32), and elastoplast body main part steel sheet (33) passes through hem (35) welding, and hem (35) of neighbouring second boundary beam (8) end of elastoplast body (10) inlays and locates between limiting plate (18) outside and second boundary beam (8), limiting plate (18) and bridge beam seam midplane (32) parallel arrangement, topside and apron (9) welding.
5. The modular bridge expansion device of claim 2, wherein: spring frame (25) are laid on the elastic plastic body (10) between first boundary beam (6) and adjacent middle beam web (15) in a fixed mode with elastic plastic body and middle beam web, spring frame (25) include spring muscle (30) and with spring muscle (30) one end welded connecting plate (31), the contained angle between spring muscle (30) and connecting plate (31) is the acute angle, the other end and first boundary beam (6) welding of spring muscle (30), fixed plate (23) and rubber slab (24) have been placed in proper order to the top of spring frame (25) unfixed.
6. The modular bridge expansion device of claim 1, wherein: the lower portions of the first side beam (6) and the second side beam (8) are respectively fixedly provided with a template (27) with the abutment/beam body (12) at the adjacent side, the upper ends of the templates (27) at the two sides are respectively higher than the lower ends of the first side beam (6) and the second side beam (8) and are respectively longitudinally staggered with the lower ends of the first side beam (6) and the second side beam (8), waterproof cloth (26) is transversely and multiply folded between the lower ends of the first side beam (6) and the second side beam (8), the waterproof cloth (26) respectively penetrates through the gaps between the templates (27) and the first side beam (6) and between the templates (27) and the second side beam (8) at the two sides, the outer sides of the first side beam (6) and the second side beam (8) are sequentially and fixedly connected with a penetrating hanging rib (29), and the penetrating rib (29) is fixed with the positioning anchor plate (4) through an anchoring rib (28).
7. The modular bridge expansion device of claim 1, wherein: an anti-blocking stone component (14) is laid between the top end of the elastic-plastic body (10) and the cover plate (9) in an unfixed manner.
8. The modular bridge expansion device of claim 2, wherein: the upper side of the middle beam web plate (15) is provided with a horizontal upper wing plate (34), and stone clamping prevention members (14) are respectively paved between the upper wing plates on one side or two sides of the middle beam web plate (15) and the elastoplast body (10).
9. The modular bridge expansion device of claim 8, wherein: the stone-block-preventing member (14) comprises a filling plate (22) filled below the upper wing plate.
10. The modular bridge expansion device according to claim 8 or 9, wherein: the anti-blocking stone component (14) sequentially comprises a base plate (19), a filling block (20) and a panel (21) from bottom to top, wherein the width of the base plate exceeds the width of the bridge beam seam (11), and the filling block (20) is made of elastic materials.
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| CN202210691536.7A CN114960414A (en) | 2022-06-17 | 2022-06-17 | Modulus formula bridge telescoping device |
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| CN202210691536.7A CN114960414A (en) | 2022-06-17 | 2022-06-17 | Modulus formula bridge telescoping device |
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