CN111236068A - Spliced prefabricated steel-concrete beam bridge deck - Google Patents
Spliced prefabricated steel-concrete beam bridge deck Download PDFInfo
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- CN111236068A CN111236068A CN202010152225.4A CN202010152225A CN111236068A CN 111236068 A CN111236068 A CN 111236068A CN 202010152225 A CN202010152225 A CN 202010152225A CN 111236068 A CN111236068 A CN 111236068A
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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
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Abstract
An assembled precast reinforced concrete beam bridge deck comprises a precast concrete slab body and end steel plates, wherein the end steel plates are arranged at two longitudinal ends of the precast concrete slab body; the end steel plate comprises a welding portion, a connecting portion and a reinforcing portion, the welding portion is used for welding two adjacent end steel plates, the connecting portion is used for connecting the end steel plates and the precast concrete plate body, the reinforcing portion is used for reinforcing the connecting strength of the connecting positions of the two end steel plates, the welding portion is arranged at the upper end of the connecting portion, the reinforcing portion is arranged at the lower end of the connecting portion, and the welding portion, the connecting portion and the reinforcing portion are located on the same. This decking wholeness is good, can carry out the common work after effectively connecting with the girder steel, and connecting piece department post-cast strip concrete has good performance, guarantees the effective connection of decking and girder steel.
Description
Technical Field
The invention relates to the field of bridge prefabrication, in particular to an assembled bridge deck.
Background
With the development of engineering technology, people have higher and higher requirements on construction technology and engineering quality, and the application of the assembly type construction technology is increasingly wide. The structural assembly type construction can realize that all the components are finished in a factory, the component quality can be improved, the component material consumption is reduced, and the structural assembly type construction method has important significance for building energy conservation. The assembly type construction can greatly reduce the workload and time of site construction, and has important effects on projects with strict construction period requirements and severe site construction environments. The method is of great importance for improving the field construction quality.
The assembly construction of the steel-concrete composite structure faces the problem of how to assemble the structure on site after the structure is disassembled. The steel beam part in the steel-concrete composite beam can be flexibly disassembled by fully utilizing the advantages of a steel structure and then assembled on site by adopting a welding and bolt connecting mode, but the bridge deck needs to be specially designed as a concrete structure. The integral bridge deck is not favorable for prefabrication and transportation due to excessively large volume, and is not in accordance with the idea of prefabrication and assembly. Therefore, the goal of prefabrication and assembly can be achieved by transversely cutting the bridge deck and then assembling the bridge deck. At present, the assembled bridge deck is connected with a steel beam in a mode of opening a hole in the bridge deck and combining with a separated type stud group and pouring concrete in the reserved hole.
For example, patent CN201620761051.0 discloses an assembled steel plate composite girder bridge based on a bolted steel-concrete composite bridge deck, which includes a main girder supporting structure composed of a plurality of steel main girders and a plurality of steel-concrete composite bridge deck sections installed on the main girder supporting structure from front to back, wherein the steel main girders are i-shaped steel main girders; the reinforced concrete composite bridge deck section comprises a plurality of reinforced concrete composite bridge deck units arranged from left to right, a longitudinal cast-in-place concrete structure is arranged right above the steel main beam, and the left and right adjacent reinforced concrete composite bridge deck units are connected through the longitudinal cast-in-place concrete structure; the reinforced concrete composite bridge deck units comprise bottom steel plates, transverse stiffening structures, prefabricated bridge deck reinforcing steel bars and prefabricated concrete plates, and the front and rear adjacent reinforced concrete composite bridge deck units are connected through a transverse cast-in-place concrete structure. The invention has the advantages of simple structure, reasonable design, simple and convenient construction, good use effect, excellent mechanical property, high construction speed of installation and disassembly, and capability of solving the problem of overlarge distance between the main beams.
However, the assembled bridge deck also has the following problems that the integration effect is difficult to achieve by assembling the bridge deck; the adaptability problem of post-cast strip concrete in the connection of the bridge deck and the steel beam.
In order to solve the problem, a spliced prefabricated steel-concrete beam bridge deck is needed, and the problem of applicability caused by post-cast strip concrete is solved while the integration effect is achieved.
Disclosure of Invention
The invention aims to solve the problem that the prior bridge deck assembly is difficult to achieve an integrated effect; the problem of the adaptability of post-cast strip concrete in decking and girder steel are connected provides a prefabricated steel-concrete beam decking of concatenation formula, and its decking wholeness is good, can carry out the common work after effectively being connected with the girder steel, and connecting piece department post-cast strip concrete has good performance, guarantees the effective connection of decking and girder steel, has solved above-mentioned problem.
The invention provides a spliced precast steel-concrete beam bridge deck, which comprises a plurality of longitudinally spliced concrete plate assemblies, wherein each concrete plate assembly comprises a first precast plate and a second precast plate, and the first precast plate and the second precast plate are longitudinally spliced; the first precast slab comprises a first precast concrete slab body and first end steel plates, and the first end steel plates are arranged at the two longitudinal ends of the first precast concrete slab body; the second precast slab comprises a second precast concrete slab body and second end steel plates, and the second end steel plates are arranged at the two longitudinal ends of the second precast concrete slab body; the first end steel plate comprises a first welding part, a first connecting part and a first reinforcing part, the first welding part is arranged at the upper end of the first connecting part, the first reinforcing part is arranged at the lower end of the first connecting part, and the first welding part, the first connecting part and the first reinforcing part are positioned on the same plate surface; the second end steel plate comprises a second welding part, a second connecting part and a second reinforcing part, the second welding part is arranged at the upper end of the second connecting part, the second reinforcing part is arranged at the lower end of the second connecting part, and the second welding part, the second connecting part and the second reinforcing part are positioned on the same plate surface; the first welding portion is used for being welded with the second welding portion, the first connecting portion is used for being connected with the first precast concrete board body, the second connecting portion is used for being connected with the second precast concrete board body, and the first reinforcing portion is bolted with the second reinforcing portion and is used for strengthening the connecting strength.
The concrete bridge deck is required to be transversely split in the assembling process of the reinforced concrete composite bridge, and the concrete bridge deck is transported to a construction site for erection after the prefabrication in a factory, so that the problem of transverse connection among the split concrete bridge decks is solved. Because the concrete modules can not be effectively connected after being prefabricated, the invention provides a bolt welding combination technology which can effectively connect the segmented concrete bridge deck.
Because the steel plates on the two sides of the concrete slab and the concrete slab form a whole through the longitudinal steel bars, the longitudinal steel bars can be provided with prestress through pre-tensioning the steel plates on the two sides in the process of prefabricating the concrete slab, and the prestress is released after the concrete is prepared, so that the concrete bridge deck module with the longitudinal prestress acting in a pre-tensioning method is formed.
According to the splicing type precast steel-concrete beam bridge deck, as a preferable mode, the highest point of the first welding portion is lower than the highest point of the first precast concrete slab body in a vertical plane where the first precast concrete slab body and the first end steel plate connecting surface are located.
The height of the steel plate is 3-5cm lower than that of the concrete slab, after the upper parts of the steel plates among the concrete modules are welded, mortar is used for leveling after a waterproof layer is manufactured on the upper parts of the steel plates, the assembled bridge floor is kept to be a flat bridge floor and can effectively prevent water, and the steel plates among the concrete are prevented from being corroded. The bottom of the steel plate is connected by high-strength bolts, and prestress is applied. And the two sides of the bolt connection are stiffened by adopting transverse and vertical steel plates, so that the effective transmission of the connection force is ensured.
According to the splicing type precast reinforced concrete beam bridge deck disclosed by the invention, as a preferable mode, the first reinforcing part comprises a connecting reinforcing steel plate and a longitudinal reinforcing steel plate, the connecting reinforcing steel plate is provided with a threaded hole which penetrates through in the longitudinal direction, the connecting reinforcing steel plate is arranged at the lower end of the first connecting part, and the longitudinal reinforcing steel plate and the connecting reinforcing steel plate are vertically arranged and are vertical to the bottom surface of the first precast concrete slab body.
According to the splicing type prefabricated steel-concrete beam bridge deck, as a preferable mode, the first connecting portion is provided with the threaded hole which is longitudinally arranged.
The invention relates to a spliced precast reinforced concrete beam bridge deck, which is characterized in that a first precast concrete plate body comprises a high-strength concrete plate, an embedded part, a plurality of longitudinal steel bars and a plurality of transverse stirrups, wherein the longitudinal steel bars are parallel to each other and longitudinally arranged in the high-strength concrete plate, the transverse stirrups and the longitudinal steel bars are mutually connected in a barrel shape, a barrel-shaped opening is longitudinally arranged in the high-strength concrete plate, and the embedded part is pre-embedded in the bottom end of the high-strength concrete plate and is connected with the transverse stirrups and the longitudinal steel bars arranged at the bottom position.
In the technology, the steel plates are embedded at the end parts of the two sides of the split rear axle deck plate, and the steel plates and the longitudinal steel bars in the precast concrete plate body are connected in a threaded mode, so that the end steel plates and the precast concrete plate body form a whole.
The spliced precast reinforced concrete beam bridge deck is characterized in that the embedded part comprises a barrel-shaped steel plate, a shear connecting piece and a longitudinal steel plate strip, the longitudinal steel plate strip is perpendicularly connected with a transverse stirrup, the barrel-shaped steel plate is arranged at the upper end of the plate surface of the longitudinal steel plate strip, the axis of the barrel-shaped steel plate is perpendicular to the plate surface of the longitudinal steel plate strip, the longitudinal reinforcement is connected with the periphery of the barrel-shaped steel plate, a barrel-shaped steel plate cavity is arranged from the barrel-shaped steel plate to the lower bottom of the first precast concrete slab body, the shear connecting piece is arranged in the barrel-shaped steel plate cavity and used for connecting the first precast concrete slab body and I-shaped steel, and post-cast concrete.
In a centralized shear connection mode, longitudinal steel bars and transverse steel bars at the post-cast strip are in a disconnected state, and the integrity of the concrete bridge deck is greatly influenced.
In order to relieve the concrete stress of the post-cast strip accessory, the integrity of the concrete bridge deck with the reserved holes is improved. This technical scheme adopts pre-buried one kind to take bucket steel sheet to take the component to solve this problem in the precast concrete decking.
The bucket-shaped structure in the member is used at the position of a post-cast strip, the Reactive Powder Concrete (RPC) or ultra-high performance concrete (UHPC) material of coarse aggregate is added at the position of the post-cast strip to transmit the house to the bucket-shaped structure, and the bucket-shaped structure transmits part of force to the steel plate strip and then uniformly transmits the rest force to the peripheral concrete, so that the stress of the concrete at the position of the post-cast strip can be relieved.
The strip-shaped structural part of the barrel-shaped steel plate can replace longitudinal steel bars at the bottom of the bridge deck plate, the post-cast strip is not broken, the transverse stirrups broken at the position can be connected with the steel plate strip in a welding mode to form a longitudinal and transverse whole, and therefore the influence of the traditional concrete bridge deck on the whole body after the longitudinal and transverse steel bars are broken at the post-cast strip is avoided. The member can be connected with the left and right connecting steel plates in the prefabrication of concrete segments, and the structural integrity is improved.
In order to prevent stress concentration, the corners of the barrel-shaped structure can adopt a circular arc shape to replace a right-angle structure, so that stress concentration is avoided. The barrel-shaped structure can be used as a template at the post-cast strip in the bridge deck prefabrication, and the work load of formwork support is reduced. The barrel-shaped post-cast strip can adopt a stud connecting piece, a perforated steel plate connecting piece or a combination of the stud connecting piece and the perforated steel plate connecting piece to form a connecting piece and the like.
According to the spliced type prefabricated steel-concrete beam bridge deck, as a preferred mode, threaded column heads with opposite thread directions matched with the threaded holes of the first connecting parts are arranged at two ends of the longitudinal steel bars.
As an optimal mode, the post-cast concrete is poured by adopting the ultra-high performance concrete added with the coarse aggregate.
When the bridge deck is integrated through the bolting and welding technology, the centralized shear connector is connected with the lower steel beam. The strength of common concrete is low, the concrete can produce great shrinkage in a post-cast strip, and the hardened concrete and the precast slab cannot be effectively connected, so that the rigidity and the strength of the fabricated composite beam are influenced.
The post-cast strip adopts RPC or UHPC added with coarse aggregate, wherein the RPC or UHPC has ultrahigh strength and compact material structure characteristics, and can effectively improve the strength and rigidity of the connection at the post-cast strip. After the coarse aggregate is added into the RPC or UHPC, the shrinkage characteristic of the material can be effectively reduced, so that the post-cast strip concrete material can effectively transfer the shearing force between the steel beam and the precast concrete deck slab, and the steel-concrete composite beam can integrally work together.
According to the spliced prefabricated steel-concrete beam bridge deck, as a preferred mode, the longitudinal steel plate strip is connected with the first reinforcing part.
The prefabrication process of the spliced prefabricated steel-concrete beam bridge deck comprises the steps of installing steel plates on the left side and the right side in place after a bridge deck formwork is supported, and connecting longitudinal steel bars with steel plates at two end parts through threads; installing the steel plate belt with the barrel in place, connecting the transverse steel bar at the reserved hole with the steel plate belt, and connecting the steel plate belt with the left and right connecting steel plates; and pouring concrete after the reinforcement cage is bound, and finishing the prefabrication of the bridge deck segment.
According to the splicing type prefabricated steel-concrete beam bridge deck, as an optimal mode, the upper ends of the first welding portion and the second welding portion are provided with the mortar layer and the waterproof layer, the mortar layer is used for leveling the first prefabricated plate and the second prefabricated plate, and the waterproof layer is used for preventing water.
The waterproof layer is in order to prevent rainwater from entering the bridge floor, and rainwater and snow water penetrate into the bridge body and the bridge to destroy a steel structure, particularly an end steel plate.
The construction process is that the prepared bridge deck sections are transported to a construction site, and after the steel beam is erected and assembled, the concrete is hoisted in place at the stage. Welding the tops of the steel plates between the bridge deck sections, checking a welding seam after welding is finished, and manufacturing a waterproof layer and a mortar leveling layer on the upper part of the welded seam after the welded seam is qualified; the positions of the preformed holes at the bottom of the steel plates between the bridge deck sections are connected through high-strength bolts, and prestress is applied. And after the transverse connection is finished, pouring RPC or UHPC material doped with coarse aggregate in the barrel-shaped area, and longitudinally connecting the barrel-shaped area with the steel beam to finish the construction of the assembled composite beam.
The invention has the following beneficial effects:
(1) the steel plate is connected with the longitudinal steel bar in the concrete plate in a thread mode, so that the end steel plate and the concrete module form a whole, and the transverse effective connection of the concrete plate can be completed;
(2) the steel plate is connected with the longitudinal steel bar in the concrete plate in a thread mode, so that the end steel plate and the concrete module form a whole, and the longitudinal prestress can be applied more conveniently by adopting a pretensioning method;
(3) the post-cast strip adopts RPC or UHPC added with coarse aggregate, so that the strength and rigidity of the connection at the post-cast strip can be effectively improved;
(4) the shrinkage performance of the material can be relieved by adding the coarse aggregate, so that the post-cast strip material can effectively transfer the shearing force between the steel beam and the precast concrete plate, and the steel beam and the concrete plate are integrated to work together.
(5) By pre-burying the steel plate belt with the barrel in the concrete plate, the stress of the concrete near the post-cast strip made of the ultra-high performance concrete material is relieved;
(6) the steel plate belt avoids the disconnection of longitudinal and transverse steel bars, and improves the structural integrity of the bridge deck.
Drawings
FIG. 1 is a schematic view of an assembled prefabricated steel-concrete beam bridge deck;
FIG. 2 is a schematic diagram of a concrete assembly of a spliced precast reinforced concrete beam bridge deck;
FIG. 3 is a schematic view of a concrete slab of a bridge deck of an assembled precast reinforced concrete beam;
FIG. 4 is a perspective view of a precast concrete slab body of a fabricated precast reinforced concrete beam deck slab;
FIG. 5 is a schematic perspective view of an embedded part of a spliced precast reinforced concrete beam bridge deck;
FIG. 6 is a schematic connection diagram of end steel plates of a spliced precast reinforced concrete beam bridge deck;
fig. 7 is a schematic view of a steel plate reinforcing part at the end part of a spliced precast reinforced concrete beam bridge deck.
Reference numerals:
1. a concrete panel assembly; 11. a first prefabricated panel; 111. a first precast concrete panel body; 1111. a high strength concrete panel; 1112. embedding parts; 11121. a barrel-shaped steel plate; 11122. a shear connector; 11123. longitudinal steel plate strips; 1113. longitudinal reinforcing steel bars; 1114. a transverse stirrup; 112. a first end steel plate; 1121. a first weld; 1122. a first connection portion; 1123. a first reinforcing portion; 11231. connecting a reinforced steel plate; 11232. a longitudinal reinforcing steel plate; 12. a second prefabricated panel; 12. a second prefabricated panel; 121. a second precast concrete panel body; 122. a second end steel plate; 1221. a second weld; 1222. a second connecting portion; 1223. a second reinforcement portion; 2. i-shaped steel; 13. a waterproof layer; 14 mortar layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be made clear below with reference to the accompanying drawings in the embodiments of the present invention.
Example 1
As shown in fig. 1, the spliced precast reinforced concrete beam bridge deck comprises a plurality of longitudinally spliced concrete plate assemblies 1 and i-beams 2, wherein the concrete plate assemblies 1 are arranged on the upper surfaces of the i-beams 2.
As shown in fig. 2, the concrete panel assembly 1 includes a first prefabricated panel 11 and a second prefabricated panel 12, and the first prefabricated panel 11 and the second prefabricated panel 12 are longitudinally spliced.
As shown in fig. 3, the first concrete plate includes a first precast concrete plate body 111 and first end steel plates 112, the first end steel plates 112 being disposed at both longitudinal ends of the first precast concrete plate body 111; the second concrete slab includes a second precast concrete slab body 121 and a second end steel plate 122, and the second end steel plate 122 is disposed at both longitudinal ends of the second precast concrete slab body 121.
As shown in fig. 4, the first precast concrete panel body 111 includes a high-strength concrete panel 1111, an embedded part 1112, a plurality of longitudinal reinforcements 1113, and a plurality of transverse stirrups 1114, the longitudinal reinforcements 1113 are parallel to each other and longitudinally disposed inside the high-strength concrete panel 1111, the transverse stirrups 1114 and the longitudinal reinforcements 1113 are coupled to each other in a barrel shape, and a barrel opening is longitudinally disposed inside the high-strength concrete panel 1111, and the embedded part 1112 is embedded in the bottom end of the high-strength concrete panel 1111 and coupled to the transverse stirrups 1114 and the longitudinal reinforcements 1113 disposed at the bottom position. The longitudinal reinforcing bar 1113 is provided at both ends thereof with screw heads having opposite directions of screw threads to be fitted into the screw holes of the first connecting portions 1122.
Because the steel plates on the two sides of the concrete slab and the concrete slab form a whole through the longitudinal steel bars, the steel plates on the two sides can be pre-pressed to provide prestress for the longitudinal steel bars in the process of prefabricating the concrete slab, and the prestress is released after the concrete is prepared, so that the concrete bridge deck module with the longitudinal prestress acting in a pre-tensioning method is formed. The method can be applied to the hogging moment area of the steel-concrete combined continuous beam and the range of 0.15L near the simply-supported combined beam support, and cracks are avoided.
As shown in fig. 5, the embedded part 1112 includes a barrel-shaped steel plate 11121, a shear connector 11122 and a longitudinal steel plate belt 11123, the longitudinal steel plate belt 11123 is vertically connected with the transverse stirrup 1114, the barrel-shaped steel plate 11121 is arranged at the upper end of the longitudinal steel plate belt 11123, the axis of the barrel-shaped steel plate 11121 is vertical to the longitudinal steel plate belt 11123, the longitudinal steel bar 1113 is connected with the periphery of the barrel-shaped steel plate 11121, a cavity of the barrel-shaped steel plate 11121 is arranged from the barrel-shaped steel plate 11121 to the lower bottom of the first precast concrete slab body 111, the shear connector 11122 is arranged in the cavity of the barrel-shaped steel plate 11121 and is used for connecting the first precast concrete slab body 111 and the i-steel 2, and. And the post-cast concrete is poured by adopting the ultra-high performance concrete added with the coarse aggregate.
The main raw materials for pouring the ultrahigh-performance concrete comprise: P.O 42.5 ordinary portland cement, fineness is 3400cm2The initial setting time is 160min, the final setting time is 220min, the water consumption of the standard consistency is 27 percent, and the loss on ignition is 0.5 percent; off-white fine silica powder with density of 2.214g/cm3Average particle diameter of 0.31mm and specific surface area of 143100cm2(ii)/g; the quartz sand comprises fine sand with the particle size of 0.16-0.32 mm, medium sand with the particle size of 0.32-0.63 mm and coarse sand with the particle size of 0.63-1.25 mm; the novel polycarboxylic acid high-performance water reducing agent has the water reducing rate of 30 percent and the solid content of 29 percent; the surface of the special thin round steel fiber is plated with copper, the diameter is 0.22mm, the length is 12-15 mm, and the tensile strength is 2800 MPa.
As shown in fig. 6, the first end steel plate 112 includes a first welding portion 1121, a first connecting portion 1122, and a first reinforcing portion 1123, the first welding portion 1121 is disposed at an upper end of the first connecting portion 1122, the first reinforcing portion 1123 is disposed at a lower end of the first connecting portion 1122, and the first welding portion 1121, the first connecting portion 1122, and the first reinforcing portion 1123 are located on the same plate surface; the second end steel plate 122 includes a second welding portion 1221, a second connecting portion 1222, and a second reinforcing portion 1223, the second welding portion 1221 is disposed at the upper end of the second connecting portion 1222, the second reinforcing portion 1223 is disposed at the lower end of the second connecting portion 1222, and the second welding portion 1221, the second connecting portion 1222, and the second reinforcing portion 1223 are located on the same plate surface; the first welding part 1121 is used for welding with the second welding part 1221, the first connecting part 1122 is used for connecting a first precast concrete panel body, the second connecting part 1222 is used for connecting a second precast concrete panel body, and the first reinforcing part 1123 is bolted with the second reinforcing part 1223 for reinforcing the connecting strength. The highest point of the first welding portion 1121 is lower than the highest point of the first precast concrete slab body 111 in the vertical plane where the connection surface of the first precast concrete slab body 111 and the first end steel plate 112 is located. The first and second connecting portions 1122 and 1222 are provided with screw holes disposed in a longitudinal direction. The upper ends of the first welding part 1121 and the second welding part 1221 are provided with a mortar layer 14 and a waterproof layer 13, the mortar layer 14 is used for leveling the first prefabricated panel 11 and the second prefabricated panel 12, and the waterproof layer 13 is used for waterproofing.
As shown in fig. 7, the first reinforcing portion includes a connection reinforcing steel plate 11231 and a longitudinal reinforcing steel plate 11232, the connection reinforcing steel plate 11231 is provided with a threaded hole penetrating in a longitudinal direction, the connection reinforcing steel plate 11231 is provided at a lower end of the first connection portion 1122, and the longitudinal reinforcing steel plate 11232 is provided perpendicular to the connection reinforcing steel plate 11231 and perpendicular to the bottom surface of the first precast concrete panel body 111.
And the connection reinforced steel plates 11231 of the two adjacent precast concrete plates are connected by using high-strength bolts.
The longitudinal strip 11123 is connected to the first reinforcement 1123.
The prefabrication process of the spliced prefabricated steel-concrete beam bridge deck comprises the steps of installing steel plates at the left end part and the right end part in place after a bridge deck formwork supports, and connecting the longitudinal steel bars with the steel plates at the two end parts through threads; installing a longitudinal steel plate strip with a barrel-shaped steel plate in place, connecting a transverse steel bar at a reserved hole with the longitudinal steel plate strip, and connecting the longitudinal steel plate strip with the left and right reinforcing parts; and pouring concrete after the reinforcement cage is bound, and finishing the prefabrication of the bridge deck segment.
The construction process is that the prepared bridge deck sections are transported to a construction site, and after the steel beam is erected and assembled, the concrete is hoisted in place at the stage. Welding the steel plate welding parts among the bridge deck sections, inspecting welding seams after welding is finished, and manufacturing a waterproof layer and a mortar leveling layer on the upper parts of the qualified bridge deck sections; the positions of the preformed holes of the steel plate connecting parts between the bridge deck sections are connected through high-strength bolts, and prestress is applied. And after the transverse connection is finished, pouring RPC or UHPC material doped with coarse aggregate in the barrel-shaped cavity area, and longitudinally connecting the RPC or UHPC material with the steel beam to finish the construction of the assembled composite beam.
The main structure materials and the sizes of the first precast slab and the second precast slab are the same, and the longitudinal splicing assemblies are sequentially and longitudinally arranged on the I-shaped steel in the construction engineering.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The utility model provides a prefabricated steel-concrete beam decking of pin-connected panel which characterized in that: the prefabricated concrete slab comprises a plurality of longitudinally spliced concrete slab assemblies (1) and I-beams (2), wherein the concrete slab assemblies (1) are arranged on the upper surfaces of the I-beams (2), each concrete slab assembly (1) comprises a first prefabricated slab (11) and a second prefabricated slab (12), and the first prefabricated slabs (11) and the second prefabricated slabs (12) are longitudinally spliced; the precast slab (1) comprises a first precast concrete slab body (111) and first end steel plates (112), wherein the first end steel plates (112) are arranged at the longitudinal two ends of the first precast concrete slab body (111); the second precast slab (2) comprises a second precast concrete slab body (121) and a second end steel plate (122), and the second end steel plate (122) is arranged at the longitudinal two ends of the second precast concrete slab body (121); the first end steel plate (112) comprises a first welding part (1121), a first connecting part (1122) and a first reinforcing part (1123), wherein the first welding part (1121) is arranged at the upper end of the first connecting part (1122), the first reinforcing part (1123) is arranged at the lower end of the first connecting part (1122), and the first welding part (1121), the first connecting part (1122) and the first reinforcing part (1123) are positioned on the same plate surface; the second end steel plate (122) includes a second welding portion (1221), a second connecting portion (1222), and a second reinforcing portion (1223), the second welding portion (1221) is disposed at an upper end of the second connecting portion (1222), the second reinforcing portion (1223) is disposed at a lower end of the second connecting portion (1222), and the second welding portion (1221), the second connecting portion (1222), and the second reinforcing portion (1223) are located on the same plate surface; the first welding part (1121) is used for welding with the second welding part (1221), the first connecting part (1122) is used for connecting a first precast concrete panel body, the second connecting part (1222) is used for connecting a second precast concrete panel body, and the first reinforcing part (1123) is bolted with the second reinforcing part (1223) for reinforcing the connecting strength.
2. The assembled prefabricated steel-concrete beam bridge deck as claimed in claim 1, wherein: the highest point of the first welding part (1121) is lower than that of the first precast concrete slab body (111) in a vertical plane where the connecting surface of the first precast concrete slab body (111) and the first end steel plate (112) is located.
3. The assembled prefabricated steel-concrete beam bridge deck according to any one of claims 1 to 2, wherein: the first reinforcing part comprises a connection reinforcing steel plate (11231) and a longitudinal reinforcing steel plate (11232), the connection reinforcing steel plate (11231) is provided with a threaded hole penetrating in the longitudinal direction, the connection reinforcing steel plate (11231) is arranged at the lower end of the first connection part (1122), and the longitudinal reinforcing steel plate (11232) is arranged perpendicular to the connection reinforcing steel plate (11231) and perpendicular to the bottom surface of the first precast concrete slab body (111).
4. The assembled prefabricated steel-concrete beam bridge deck as claimed in claim 3, wherein: the first connecting portion (1122) is provided with a threaded hole arranged longitudinally.
5. The assembled prefabricated steel-concrete beam bridge deck as claimed in claim 1, wherein: the first precast concrete board body (111) comprises a high-strength concrete board (1111), an embedded part (1112), a plurality of longitudinal steel bars (1113) and a plurality of transverse stirrups (1114), wherein the longitudinal steel bars (1113) are parallel to each other and are longitudinally arranged inside the high-strength concrete board (1111), the transverse stirrups (1114) and the longitudinal steel bars (1113) are mutually connected in a barrel shape, a barrel-shaped opening is longitudinally arranged inside the high-strength concrete board (1111), and the embedded part (1112) is embedded in the transverse stirrups (1114) and the longitudinal steel bars (1113) arranged at the bottom position in a coupling mode at the bottom end of the high-strength concrete board (1111).
6. The spliced type prefabricated steel-concrete beam bridge deck according to claim 5, wherein: the embedded part (1112) comprises a barrel-shaped steel plate (11121), a shear connector (11122) and a longitudinal steel plate strip (11123), the longitudinal steel plate strip (11123) is perpendicularly connected with the transverse stirrups (1114), the barrel-shaped steel plate (11121) is arranged at the upper end of the surface of the longitudinal steel plate strip (11123) and the axis of the barrel-shaped steel plate (11121) is perpendicular to the surface of the longitudinal steel plate strip (11123), the longitudinal reinforcements (1113) are connected with the periphery of the barrel-shaped steel plate (11121), the barrel-shaped steel plate (11121) is arranged on the lower bottom of the first precast concrete plate body (111) and provided with a barrel-shaped steel plate (11121) cavity, the shear connector (11122) is arranged in the barrel-shaped steel plate (11121) cavity and used for connecting the first precast concrete plate body (111) and the I-shaped steel (2), and post-cast concrete is arranged in the barrel-shaped steel plate (11121).
7. The spliced type prefabricated steel-concrete beam bridge deck according to claim 6, wherein: and two ends of the longitudinal steel bar (1113) are provided with threaded column heads with opposite thread directions matched with the threaded holes of the first connecting part (1122).
8. The spliced type prefabricated steel-concrete beam bridge deck as claimed in any one of claims 6 to 7, wherein the spliced type prefabricated steel-concrete beam bridge deck is characterized in that: and the post-cast concrete is poured by adopting the ultra-high performance concrete added with the coarse aggregate.
9. The spliced type prefabricated steel-concrete beam bridge deck according to any one of claims 1 to 8, wherein the spliced type prefabricated steel-concrete beam bridge deck comprises: the longitudinal strip (11123) of steel plate is connected to the first reinforcement (1123).
10. The spliced type prefabricated steel-concrete beam bridge deck according to claim 1, wherein: the waterproof layer (13) is arranged at the upper ends of the first welding portion (1121) and the second welding portion (1221), a mortar layer (14) is arranged at the upper end of the waterproof layer, the mortar layer (14) is used for leveling the first prefabricated plate (11) and the second prefabricated plate (12), and the waterproof layer (13) is used for preventing water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010152225.4A CN111236068A (en) | 2020-03-06 | 2020-03-06 | Spliced prefabricated steel-concrete beam bridge deck |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010152225.4A CN111236068A (en) | 2020-03-06 | 2020-03-06 | Spliced prefabricated steel-concrete beam bridge deck |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112921810A (en) * | 2021-01-21 | 2021-06-08 | 李晟 | Construction method of assembled bridge |
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2020
- 2020-03-06 CN CN202010152225.4A patent/CN111236068A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112921810A (en) * | 2021-01-21 | 2021-06-08 | 李晟 | Construction method of assembled bridge |
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