CN110983993A - Bridge reinforcing apparatus based on load transfer - Google Patents
Bridge reinforcing apparatus based on load transfer Download PDFInfo
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- CN110983993A CN110983993A CN201911185310.4A CN201911185310A CN110983993A CN 110983993 A CN110983993 A CN 110983993A CN 201911185310 A CN201911185310 A CN 201911185310A CN 110983993 A CN110983993 A CN 110983993A
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- 238000012546 transfer Methods 0.000 title claims abstract description 36
- 230000003014 reinforcing effect Effects 0.000 title description 30
- 230000002787 reinforcement Effects 0.000 claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims description 77
- 239000010959 steel Substances 0.000 claims description 77
- 239000004575 stone Substances 0.000 claims description 14
- 238000010008 shearing Methods 0.000 claims description 4
- 238000004026 adhesive bonding Methods 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 16
- 238000010276 construction Methods 0.000 abstract description 9
- 239000002131 composite material Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 18
- 238000009434 installation Methods 0.000 description 8
- 238000003466 welding Methods 0.000 description 8
- 239000004570 mortar (masonry) Substances 0.000 description 7
- 229920000642 polymer Polymers 0.000 description 6
- 230000000712 assembly Effects 0.000 description 5
- 238000000429 assembly Methods 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
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- 238000005259 measurement Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
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- 229910001220 stainless steel Inorganic materials 0.000 description 1
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- 238000009827 uniform distribution Methods 0.000 description 1
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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
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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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
- E01D19/04—Bearings; Hinges
- E01D19/041—Elastomeric bearings
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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
- E01D19/04—Bearings; Hinges
- E01D19/042—Mechanical bearings
- E01D19/046—Spherical bearings
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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
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/02—Bridges characterised by the cross-section of their bearing spanning structure of the I-girder type
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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Abstract
本发明公开了基于荷载转移的桥梁加固装置，包括支撑系统和新增梁体，新增梁体的底部安装在支撑系统上，支撑系统安装在盖梁上，新增梁体的顶部顶在湿接缝的底部，且新增梁体的顶部翼缘顶在原梁体的翼缘上。本发明的有益效果是：在不改变原梁体构造及承载能力的情况下，增设部分新梁体，将原梁体承担的部分荷载转移至新梁体，使原梁体满足新设计规范的标准，原梁体与新增梁体均满足100年的设计基准期，且新增梁体可实现标准化设计，工厂化生产，现场装配施工，工期短，工程费用低；新增梁体与原梁体形成组合结构，共同承担桥面汽车载荷，从而提高桥梁的承载能力。
The invention discloses a bridge reinforcement device based on load transfer, comprising a support system and a newly added beam body. The bottom of the newly added beam body is installed on the support system, the support system is installed on the cover beam, and the top of the newly added beam body is placed on the wet The bottom of the seam, and the top flange of the new beam body rests on the flange of the original beam body. The beneficial effects of the present invention are: without changing the structure and bearing capacity of the original beam body, some new beam bodies are added, and part of the load borne by the original beam body is transferred to the new beam body, so that the original beam body meets the requirements of the new design specification. Standard, both the original beam body and the new beam body meet the design reference period of 100 years, and the new beam body can realize standardized design, factory production, on-site assembly and construction, short construction period and low engineering cost; the new beam body and the original beam body can be realized. A composite structure is formed to jointly bear the vehicle load on the bridge deck, thereby improving the bearing capacity of the bridge.
Description
Technical Field
The invention relates to the technical field of bridge reinforcement, in particular to a bridge reinforcing device based on load transfer.
Background
With the economic development of China, on one hand, the axle load of an automobile and the traffic volume are continuously increased, bridges designed according to the general specification for highway bridge and culvert design (JTJ 021-89) and the JTG D60-2004) cannot meet the requirements of the general specification for highway bridge and culvert design (JTG D60-2015) of the existing specification, and on the other hand, after the bridge is overloaded and operated for a long time, the bearing capacity of an original beam body is degraded, and transverse cracks and web oblique cracks already appear on part of the original beam body. The strengthening method recommended by the highway bridge strengthening design Specification (JTG/T J22-2008) comprises a section enlarging method, a fiber composite material pasting method, an external prestressing method and a modification system method. The basic principle is to improve the bearing capacity of the beam body.
Under the condition of improving the bearing capacity of the bridge, the reinforcing methods also have the following defects:
1. the original structure is damaged to a certain extent;
2. the durability of the adhered steel plate and fiber composite material cannot be ensured;
3. the reinforcement aims to restore the bearing capacity of the bridge generally, and the design standard is difficult generally if the design standard is improved;
4. the construction period is generally longer;
5. the operation of the highway is influenced in the construction process.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a bridge reinforcing device based on load transfer, which is characterized in that a part of new beam bodies are additionally arranged under the condition of not changing the structure and the bearing capacity of the original beam bodies, and the part of load borne by the original beam bodies is transferred to the new beam bodies, so that the original beam bodies meet the standard of new design specifications.
The purpose of the invention is realized by the following technical scheme: bridge reinforcing apparatus based on load transfer, including braced system and newly-increased roof beam body, the bottom of newly-increased roof beam body is installed on braced system, and braced system installs on the bent cap, and the top of newly-increased roof beam body is in the bottom of wet seam, and the top edge of a wing of newly-increased roof beam body is on the edge of a wing of former roof beam body.
Preferably, the top surface of the newly-added beam body is a curved surface, and the newly-added beam body transfers load in a concentrated force mode or a uniform force mode or a secondary curve distribution force mode between the supporting system and the original beam body.
Preferably, the supporting system adopts a self-slope-adjusting jacking support which comprises a self-slope-adjusting device and a jacking supporting device, the jacking supporting device comprises a leveling bolt and a jacking steel plate, the leveling bolt is installed in a support cushion stone, the support cushion stone is poured on the cover beam, the jacking steel plate is slidably installed on the leveling bolt and is limited by a limiting nut installed on the leveling bolt, and the self-slope-adjusting device is installed on the jacking steel plate.
Preferably, from the slope adjusting device including transferring the slope steel sheet, the backing plate, rubber support and slide, the bottom of transferring the slope steel sheet is provided with spherical portion, the top of backing plate seted up with spherical portion complex spherical groove, and the top of backing plate and the bottom contactless of transferring the slope steel sheet, the slide is installed on the jacking steel sheet, the spout has been seted up on the slide, the bottom at the backing plate is installed at the top of rubber support, and the bottom of rubber support is located the spout, still install the slide between rubber support and the spout.
Preferably, the bottom edge of the slope regulating steel plate is provided with a limiting plate, and the limiting plates are sequentially connected end to form a closed ring.
Preferably, still include the reinforcement subassembly, the reinforcement subassembly includes crossbeam, support frame and backup pad, installs the support frame on the former roof beam body lateral wall that is close to the newly-increased roof beam body, installs the backup pad on the support frame, and the one end fixed mounting of crossbeam is in the backup pad, and the other end of crossbeam is fixed on the web of newly-increased roof beam body.
Preferably, newly-increased roof beam body still includes top flange board and bottom flange board, and the top flange board is installed at the top of web, and the bottom flange board is installed in the bottom of web, and the bottom flange board is fixed on the steel sheet of transferring slope, and the interval is provided with a plurality of stiffening ribs A on the web, and the upper and lower both ends of stiffening rib A push up respectively on corresponding top flange board and bottom flange board, transversely are provided with stiffening rib B on the part stiffening rib A.
Preferably, the upper flange plate is provided with a shear nail group, the shear nail group consists of a plurality of shear nails, and the shear nails are positioned in the wet joint.
Preferably, the newly added beam body and the flange of the original beam body are connected into an integral structure through gluing or shearing nails.
Preferably, the newly-added beam body is a steel plate beam, and the original beam body is a box beam or a T beam.
The invention has the following advantages: the bridge reinforcing device is characterized in that a part of new beam bodies are additionally arranged under the condition that the structure and the bearing capacity of the original beam bodies are not changed, part of load borne by the original beam bodies is transferred to the new beam bodies, so that the original beam bodies meet the standard of new design specifications, and the original beam bodies and the newly added beam bodies meet the design benchmark period of 100 years, and compared with the existing bridge reinforcing device, the bridge reinforcing device has the following advantages:
1. the newly added beam body can realize standardized design, industrialized production and field assembly construction;
2. no damage or micro damage to the original designed beam body;
3. the durability is good, and the design benchmark period of 100 years can be reached together with the original beam body;
4. the construction period is short, and the engineering cost is low;
5. the application range is wide, the requirement for improving the bearing capacity of the bridge with unchanged design standard can be met, and the requirement for improving the design standard of the bridge can also be met;
6. the influence on the operation of the highway is small;
7. the bridge reinforcing device based on load transfer and the original beam body form a combined structure to bear the load of the bridge deck automobile together, so that the bearing capacity of the bridge is improved;
8. the bridge reinforcing device based on load transfer can share the dead load of the original beam body, has an independent supporting system and can directly transmit the increased load to the bridge pier without passing through the original beam body.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a steel plate girder;
FIG. 3 is a schematic view of I-I in FIG. 2;
FIG. 4 is a schematic view of the structure II-II in FIG. 2;
FIG. 5 is a schematic view of the structure III-III of FIG. 2;
FIG. 6 is a schematic structural view of a reinforcement assembly;
FIG. 7 is a schematic structural view of a self-adjusting jacking support
FIG. 8 is a schematic structural diagram of a slope-adjusting steel plate;
FIG. 9 is a schematic view of the construction of the pallet;
FIG. 10 is a schematic view of the installation of the jack;
in the figure, 1-original beam body, 2-newly-added beam body, 3-reinforcing component, 4-self-slope-adjusting jacking support, 5-wet joint, 21-upper flange plate, 22-lower flange plate, 23-web plate, 24-reinforcing rib A, 25-reinforcing rib B, 26-shear nail, 31-cross beam, 32-support frame, 33-support plate, 41-slope-adjusting steel plate, 42-backing plate, 43-rubber support, 44-sliding plate, 45-sliding seat, 46-jacking steel plate, 47-sliding groove, 48-leveling bolt, 49-limiting nut, 50-limiting plate, 51-spherical part and 52-spherical groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort belong to the protection scope of the present invention.
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships that the products of the present invention conventionally lay out when in use, or the orientations or positional relationships that are conventionally understood by those skilled in the art, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in figure 1, the bridge reinforcing device based on load transfer comprises a supporting system and a newly-added beam body 2, wherein the bottom of the newly-added beam body 2 is installed on the supporting system, and the supporting system is installed on a cover beam, so that the newly-added beam body 2 is connected with the cover beam of a bridge pier or a bridge abutment through the supporting system to transmit the load of the newly-added beam body, the top of the newly-added beam body 2 is abutted against the bottom of a wet joint 5, and the top flange of the newly-added beam body 2 is abutted against the flange of an original beam body 1. Through newly adding roof beam body 2, under the condition that does not change former roof beam body 1 structure and bearing capacity, add partial new roof beam body 2, transfer the partial load that former roof beam body 1 bore to new roof beam body 2, make former roof beam body 1 satisfy the standard of new design standard, in this embodiment, newly adding the roof beam body and can be the steel sheet roof beam, but not only be limited to the steel sheet roof beam, preferably, newly adding roof beam body 2 and being the steel sheet roof beam, former roof beam body 1 is box girder or T roof beam.
In this embodiment, the top surface of the newly added beam body is a curved surface, the newly added beam body transfers load through a concentrated force form or an even force form or a quadratic curve distribution force form between the supporting system and the original beam body, when in actual use, the appearance of the bridge needs to be detected, and then the bridge is repaired and reinforced by adopting a proper load transfer method according to the crack area of the bridge.
Specifically, if the fulcrum area has an inclined crack, the lack of support counter-force and shear force is indicated, at the moment, a concentrated load transfer method is adopted, the top surface of the newly added beam body 2 is designed into a plane, the top surface of the newly added beam body 2 is parallel to the flange of the original beam body 1, the top surface of the newly added beam body 2 is in parallel contact with the flange of the original beam body 1, a jacking force is exerted on the newly added beam body 2 according to the preset transfer load, the jacking force is transmitted to the flange of the original beam body 1 in a concentrated force mode, the support counter-force and shear force of the original beam body 1 are reduced, the bearing capacity of the original beam body 1 is increased, the original beam body 1 and the newly added beam body share the automobile load on the common bridge floor, and the bearing capacity of the bridge is improved.
If the lower edge of the web plate of the original beam body 1 has cracks, the bending resistance of the original beam body 1 is insufficient, at the moment, a uniformly distributed load transfer method is adopted, the top surface of the newly added beam body 2 is made into a secondary curved surface, according to the preset transfer load size, a jacking force is applied to the newly added beam body 2, the span of the newly added beam body 2 is firstly contacted with the flange of the original beam body 1 in the jacking process, the newly added beam body 2 is gradually deformed along with the gradual increase of the jacking force, a contact surface extends from the span to two sides until the contact surface is completely contacted, therefore, uniformly distributed load is applied to the flange of the original beam body 1 through the curved surface of the newly added beam body 2, the bending moment, the shearing force of a fulcrum area and the counter-force of a support in the span of the original bridge are reduced, then a combined structure is formed by the newly added beam body 2 and the original beam body 1, the automobile load of the bridge floor is jointly borne, the bearing, the top curved surface and the transfer load of the newly added beam body 2 satisfy the following relations:
wherein: q represents the uniform load per unit length, unit: kN/m;
l represents the length of the steel beam in units: m;
μ represents the ratio of the x coordinate to the beam length L;
y represents the beam deflection at x position from the beam end in units: m;
e represents the modulus of elasticity of the steel beam, in units: MPa;
i represents the moment of inertia of the section of the steel beam, in units: m is4。
If the midspan region of the original beam body 1 is cracked and warped downwards during the midspan, the bending resistance of the midspan region of the original beam body 1 is insufficient, at the moment, a secondary parabolic load transfer method is adopted, the newly added beam body 2 is made into a high-order curved surface, a jacking force is applied to the newly added beam body 2 according to the preset transfer load, in the jacking process, the newly added beam body 2 contacts with the flange of the original beam body 1 during the midspan, the newly added beam body gradually deforms along with the gradual increase of the jacking force, and the contact surfaces extend from the midspan to two sides until the contact surfaces are completely contacted. Transferring load to apply secondary curve load to the flange of the original beam body 1 through the curved surface of the newly added beam body 2, and reducing the whole span bending moment of the original bridge, the shearing force of a fulcrum area and the counter force of a support; the newly-added beam body 2 and the original beam body 1 form a combined structure to bear the load of the bridge deck automobile together, so that the bearing capacity of the bridge is improved; further, when the load is transferred between the newly added beam body and the original beam body by the force distributed by the quadratic curve, the top curved surface of the newly added beam body 2 and the transferred load satisfy the following relation:
wherein: q represents the uniform load per unit length, unit: kN/m;
l represents the length of the steel beam in units: m;
μ represents the ratio of the x coordinate to the beam length L;
y represents the beam deflection at x position from the beam end in units: m;
e represents the modulus of elasticity of the steel beam, in units: MPa;
i represents the moment of inertia of the section of the steel beam, in units: m is4。
In this embodiment, newly-increased roof beam body 2 and former roof beam body 1 edge of a wing pass through adhesive or shear force nail and connect into overall structure, and further, newly-increased roof beam body 2's top surface is scribbled and is equipped with polymer elastic mortar, and in newly-increased roof beam body 1 jacking in-process, polymerization does not have elastic mortar and can be extruded, and polymer elastic mortar can fill the gap between newly-increased roof beam body 2 and former roof beam body 1 simultaneously to the transmission of jacking force has been guaranteed evenly.
In this embodiment, the newly added beam 2 and the flange part of the original beam 1 are connected after a preset pressure is applied through a support system, so that a pair of reaction forces are formed between the contact surfaces of the newly added beam 2 and the original beam 1, the original beam 1 bears the reaction force opposite to the original load direction to achieve the unloading effect, the newly added beam 1 bears the reaction force in the same direction as the load direction to achieve the load transfer, further, the support system adopts a self-slope-adjusting jacking support 4, as shown in fig. 7, the self-slope-adjusting jacking support 4 comprises a self-slope-adjusting device and a jacking support device, the jacking support device comprises a leveling bolt 48 and a jacking steel plate 46, the leveling bolt 48 is installed in a support base stone, the support base stone is poured on the capping beam, when the support base stone is poured, the leveling bolt 48 is embedded in the support base stone, the jacking steel plate 46 is slidably installed on the leveling bolt 48, a plurality of leveling bolts 48 are provided, preferably, four leveling bolts 48 are provided and are respectively located at four corners of the jacking steel plate 46, through holes are provided at the four corners of the jacking steel plate 46, the leveling bolts 48 penetrate through the through holes, and limit nuts 49 are threadedly mounted on the leveling bolts 48, after the jacking steel plate 46 is mounted, the leveling steel plate is limited by the limit nuts 49 mounted on the leveling bolts 48, the jacking steel plate 46 can be leveled by adjusting the positions of the limit nuts 49, so as to ensure the levelness of the jacking steel plate 46, during the jacking process, the jacking equipment is a jack, the jack is placed in a cavity between the jacking steel plate 46 and the support cushion stone, then the jack works to jack the jacking steel plate 46 upwards, so that the newly added beam 2 moves upwards, and finally the top flange of the newly added beam 2 is jacked at the bottom of the wet joint 5 and the bottom of the two adjacent original beam 1 The flanges, and the wet joint 5 and the flanges of the original beam body 1 are subjected to an upward lifting force, but the lifting force is not enough to change the positions of the wet joint 5 and the original beam body 1, when the vehicle runs on the bridge, however, the original beam body 1 and the wet joint 5 are pressed downwards, and the original beam body 1 and the wet joint 5 are subjected to upward jacking force at the moment, so that the jacking force and the pressure are mutually counteracted, thereby reducing the resultant force on the original beam body 1 and the wet joint 5, improving the bearing capacity of the original beam body 1 and the wet joint 5, and fastening the limit nut 49 when the newly added beam body 2 meets the requirement, the vertical height of the jacking steel plate 46 is then fixed, the jack is then removed, and the cavity between the jacking steel plate 46 and the support pad is filled with concrete, preferably with the top surface of the concrete flush with the top surface of the jacking steel plate 46.
In the embodiment, the self-slope-adjusting device is installed on a jacking steel plate 46, as shown in fig. 7, and the self-slope-adjusting device comprises a slope-adjusting steel plate 41, a backing plate 42, a rubber support 43 and a slide seat 45, as shown in fig. 8, the bottom of the slope-adjusting steel plate 41 is provided with a spherical part 51, as shown in fig. 9, the top of the backing plate 42 is provided with a spherical groove 52 matched with the spherical part 51, and the top of the backing plate 42 is not contacted with the bottom of the slope-adjusting steel plate 41 and is matched with the spherical groove 52 through the spherical part 51, so that the spherical part 51 can rotate 360 degrees in the spherical groove 52, further, the spherical part 51 is usually a spherical crown or spherical hinge, after the slope-adjusting steel plate 41 is stressed, the slope-adjusting steel plate 41 can automatically incline, so as to realize self-slope-adjusting along with the change of stress, and through the matching of the spherical part 51 and the spherical groove 52, the stress of the backing plate 42 can, thereby ensuring the useful life of the backing plate 42.
In this embodiment, slide 45 installs on jacking steel sheet 46 board, the spout 47 has been seted up on slide 45, the bottom at backing plate 42 is installed at the top of rubber support 43, and the bottom of rubber support 43 is located spout 47, still install slide 44 between rubber support 43 and the spout 47, slide 44 is made for stainless steel, after the atress of accent sloping steel sheet 41, can make rubber support 43 warp, thereby make rubber support 43 hug closely slide 44, preferentially, slide 44 all has a sliding gap before, after, left and right, consequently, the bridge is at flexible in-process, slide 44 can slide according to the atress direction, make whole self-adjusting sloping device, can adapt to various weather changes, increase its suitability.
In this embodiment, the bottom edge of the slope-adjusting steel plate 41 is provided with the limiting plate 50, the limiting plate 50 can avoid the slope-adjusting steel plate 41 from sliding out of the spherical groove 52 in the process of rotating and inclining, so as to ensure the stability and reliability of the support base plate 42, further, the limiting plates 50 are sequentially connected end to form a closed ring shape, the commonly used limiting plates 50 form a shape like a Chinese character 'kou' or a circular ring shape, so that the limiting plates 50 are all arranged around the bottom of the slope-adjusting steel plate 41, and therefore, the self-slope-adjusting device can be applied to the installation environment of cross slopes and longitudinal slopes.
In this embodiment, as shown in fig. 1, the bridge reinforcing apparatus based on load transfer further includes a reinforcing component 3, as shown in fig. 6, the reinforcing component 3 includes a cross beam 31, a support frame 32 and a support plate 33, the support frame 32 is installed on the side wall of the original beam body 1 near the newly added beam body 2, the support plate 33 is installed on the support frame 32, one end of the cross beam 31 is fixedly installed on the support plate 33, the other end of the cross beam 31 is fixed on the web 23 of the newly added beam body 2, further, as shown in fig. 2, 3, 4 and 5, the newly added beam body 2 further includes an upper flange plate 21 and a lower flange plate 22, the upper flange plate 21 is installed on the top of the web 23, the lower flange plate 22 is installed on the bottom of the web 23, and the lower flange plate 22 is fixed on the slope-adjusting steel plate 41, the upper flange plate 21, the lower flange plate 22 and the web 23 are connected by welding, and the upper flange plate 21 and the lower flange plate 22 form, preferably, the reinforcing components 3 are installed on both sides of the web 23, when the reinforcing components 3 are installed, anchor bolts are installed on the original beam body 1, when the bridge is constructed, the anchor bolts are directly embedded in the original beam body 1 when the original beam body 1 is poured, when the bridge is reinforced and repaired, holes are formed in the side wall of the original beam body 1, then the anchor bolts are installed in the holes, when the anchor bolts are installed, an adhesive is required to be used to ensure that the anchor bolts and the original beam body 1 are stably installed, through holes are formed in the supporting plate 33, the supporting plate 33 is installed on the anchor bolts and then locked by nuts, the supporting plate 32 is welded on the supporting plate 33, grooves are formed in the supporting frame 32, the grooves can facilitate installation of the cross beams 31, the distance between the bottoms of the grooves and the web 23 is measured, then one ends of the cross beams 31 with corresponding sizes are installed in the grooves, the groove can support the beam 31 to facilitate welding, when the beam 31 is installed, the two ends of the beam 31 are welded with the corresponding support frame 32 and the web 23 by welding, in this embodiment, the number of the reinforcement assemblies 3 is determined according to the size of the newly added beam 2, when the newly added beam 2 is longer, such as 20 meters, the reinforcement assemblies 3 are installed at 1/4, 2/4 and 3/4 of the newly added beam 2, and when the newly added beam 2 is shorter, such as 8 meters, the reinforcement assemblies 3 are directly installed at the middle position of the newly added beam 2, through the reinforcement assemblies 3, the structural strength of the newly added beam 2 can be increased, the newly added beam 2 is prevented from deforming, the service life and the bearing capacity of the newly added beam 2 are ensured, the newly added beam 2 is reinforced by the reinforcement assemblies 3, the structure system of the original beam body 1 is not changed, the bearing capacity of the original beam body is not improved, the whole reinforcing process has no damage or slight damage to the original beam body 1, and the service life of the original beam body 1 is not influenced.
In this embodiment, the web 23 is provided with a plurality of reinforcing ribs a24 at intervals, the upper and lower ends of the reinforcing rib a24 respectively abut against the corresponding upper flange plate 21 and the corresponding lower flange plate 22, a reinforcing rib B25 is transversely provided on a part of the reinforcing ribs a24, and both the reinforcing ribs a24 and the reinforcing ribs B25 can increase the structural strength of the newly added beam 2, so as to increase the bearing capacity of the newly added beam 2.
In the embodiment, a shear nail 26 group is installed on the upper flange plate 21, the shear nail 26 group is composed of a plurality of shear nails 26, and the shear nails 26 are located in the wet joint 5, when the bridge belongs to a newly-built bridge, the shear nails 26 are directly welded on the upper flange plate 21, then the wet joint 5 is poured, the shear nails 26 are poured in the wet joint 5, and when the bridge is used for repairing and reinforcing the bridge, a plurality of holes are opened on the upper flange plate 21, then holes for installing the shear nails 26 are opened on the wet joint 5, finally the shear nails 26 are installed in the holes of the wet joint 5 of the upper flange plate 21, gaps between the shear nails 26 and the holes are filled with an adhesive, through the shear nails 26, the contact performance of the upper flange plate 21 and the wet joint 5 can be ensured, so that the internal stress generated during the extension and contraction of the wet joint 5 can be effectively and timely transmitted to the upper flange plate 21, thereby the self-slope-adjusting device can be adjusted in time.
A bridge reinforcing device based on load transfer takes a steel plate beam as an example to explain a construction method of the bridge reinforcing device, and comprises the following steps:
s1: pouring once, namely pouring a support base stone on the bent cap between two adjacent original beam bodies 1, and embedding a plurality of leveling bolts 48 in the support base stone, preferably, four leveling bolts 48 are uniformly distributed on four corners of the jacking steel plate 46;
s2: installing a jacking steel plate 46, installing the jacking steel plate 46 on a leveling bolt 48, supporting and limiting through a limiting nut 49, then adjusting the limiting nut 49 to ensure the levelness of the jacking steel plate 46, wherein the levelness of the jacking steel plate 46 needs to be ensured, and during specific construction, a leveling rod is adopted for measurement;
s3: installing a self-slope-adjusting device, welding a sliding seat 45 on a jacking steel plate 46, then placing a sliding plate 44 in a sliding groove 47 of the sliding seat 45, placing a rubber support 43 on the sliding plate 44, then installing a backing plate 42 on the rubber support 43, then installing a slope-adjusting steel plate 41 on the backing plate 42, and enabling a spherical part 51 to be matched in a spherical groove 52; the sliding seat 45, the rubber support 43, the backing plate 42 and the slope adjusting steel plate 41 are directly manufactured in a factory, then are transported to a bridge repairing position and are directly assembled by constructors, and during installation, when attention needs to be paid, the fact that the gravity center lines of the sliding seat 45, the rubber support 43, the backing plate 42 and the slope adjusting steel plate 41 coincide with the gravity center line of the jacking steel plate 46 is guaranteed to the greatest extent;
s4: assembling a newly added beam body 2, manufacturing an upper flange plate 21, a lower flange plate 22 and a web plate 23 in a factory according to the bridge deck condition, then assembling the upper flange plate 21, the lower flange plate 22 and the web plate 23 in a welding mode, enabling the upper flange plate 21, the lower flange plate 22 and the web plate 23 to form an I shape, and then welding a reinforcing rib A24 and a reinforcing rib B25 on the web plate 23 according to the actual condition so as to improve the structural strength of the newly added beam body 2;
s5: installing the newly added beam body 2, fixedly installing the newly added beam body 2 assembled by S4 on the slope-adjusting steel plate 41, and coating the polymer elastic mortar on the upper flange plate 21, preferably, welding the lower flange plate 22 of the newly added beam body 2 with the slope-adjusting steel plate 41, and installing the self-adjusting slope jacking support 4 on the capping beam, so that both ends of the newly added beam body 2 are both installed on the slope-adjusting steel plate 41, that is, the whole newly added beam body 2 is supported by the self-adjusting slope jacking supports 4 at both ends, the polymer elastic mortar is not easy to be too early coated, when the newly added beam body 2 needs to be jacked, the polymer elastic mortar is coated, and the polymer elastic mortar can ensure that the upper flange plate 21 is in complete contact with the joint wet 5 and the flange of the original beam body 1, thereby ensuring the uniform distribution and transmission of the jacking force.
S6: jacking the newly-added beam body 2, placing a jack between the jacking steel plate 46 and the support base cushion stone, then enabling the jack to work, enabling the upper flange plate 21 to be propped against the bottom of the wet joint 5, enabling the top flange of the upper flange plate 21 to be propped against the flanges of two adjacent original beam bodies 1, and fastening the leveling bolt 48 after the jacking force reaches a set requirement to ensure the position of the newly-added beam body 2 so as to ensure the size of the jacking force;
s7: installing the reinforcing component 3, installing a support plate 33 on the side wall of the original beam body 1, then fixedly installing a support frame 32 on the support plate 33, respectively welding two ends of a cross beam 31 on the corresponding support plate 33 and the web plate 23, when installing the support plate 33, arranging an installation hole on the side wall of the original beam body 1, then installing an anchor bolt in the installation hole, and when installing the anchor bolt, filling adhesive in the installation hole to ensure the installation stability of the anchor bolt;
s8: the secondary is pour, shifts out the jack, pours the concrete once more on the support stone setting, and makes the cavity of jacking steel sheet 46 board and support stone setting filled with concrete, and is preferred, and the surface of concrete should flush with the surface of jacking steel sheet 46 board to promote the steadiness of jacking steel sheet 46 board.
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 various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some of the features described in the embodiments and/or modifications thereof can be made without departing from the spirit and scope of the invention.
Claims (10)
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| CN111778877A (en) * | 2020-07-07 | 2020-10-16 | 梁国莉 | Bridge reinforcing device for load transfer |
| CN112921834A (en) * | 2021-02-22 | 2021-06-08 | 河南省交通规划设计研究院股份有限公司 | Bridge wet joint reinforcing device and installation method |
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| CN115976943A (en) * | 2023-03-22 | 2023-04-18 | 交通运输部公路科学研究所 | A prefabricated hollow slab structure and construction method |
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