CN217601203U - Steel-UHPC combined bridge deck system capable of realizing rapid and accurate installation - Google Patents
Steel-UHPC combined bridge deck system capable of realizing rapid and accurate installation Download PDFInfo
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- CN217601203U CN217601203U CN202220627520.5U CN202220627520U CN217601203U CN 217601203 U CN217601203 U CN 217601203U CN 202220627520 U CN202220627520 U CN 202220627520U CN 217601203 U CN217601203 U CN 217601203U
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Abstract
The utility model discloses a can realize steel-UHPC combination bridge floor system of quick accurate installation, including steel decking, steel decking upper berth is equipped with the UHPC thin layer, steel decking with vertical interval is equipped with a plurality of shear connection boards between the UHPC thin layer, be equipped with a plurality of horizontal interval arrangement's main notch and vice notch on the shear connection board, vice notch with main notch central symmetry arranges, and main notch with vice notch all pegs graft in the notch has horizontal muscle, still be equipped with many vertical muscle between steel decking and the UHPC thin layer; the steel-UHPC combined bridge deck has the advantages of small building height, good bidirectional bending and pulling performance, high bearing capacity of the steel-concrete interface connecting piece, excellent fatigue performance, small influence degree of the connection performance by welding quality, convenience in installation and construction and capability of supporting automatic mechanical production to a large extent.
Description
Technical Field
The utility model relates to bridge construction technical field, concretely relates to can realize steel-UHPC combination bridge floor system of quick accurate installation.
Background
The existing steel structure bridge deck has the characteristics of light weight, convenient transportation and erection, short construction period and the like, and becomes the first-choice bridge deck form of a large-span bridge, but practice proves that the existing steel structure bridge deck has the following technical problems: the steel bridge deck pavement is very easy to damage. At present, the steel bridge deck is paved by adopting asphalt mixture, and is directly paved on the steel bridge deck, the bridge deck pavement has serious diseases such as cracking, rutting, water seepage and the like after being in service soon, and the service life of most of the bridge deck pavement does not exceed the design service life of the bridge deck, which becomes the common fault of the steel bridge deck. The main reason that the asphalt pavement of the steel bridge deck is easy to damage is that the rigidity of the steel bridge deck is insufficient, and the asphalt pavement layer is locally positioned in a high stress amplitude area of a steel bridge deck and is easy to generate fatigue cracking; asphalt concrete on the steel bridge surface has severe working environment and more overloaded vehicles, and under the combined action of traveling load, temperature and the like, the problems of rutting, delamination and the like easily occur on a pavement layer. At present, for the problems of steel bridge deck pavement, the conventional solution ideas are to improve the material property of a pavement mixture, improve the adhesive force and the deformability with the steel bridge deck, optimize the thickness of a pavement layer and the like, but the measures are not the cause of symptoms.
In order to solve the technical problems, the structural design of the lightweight combined bridge deck made of the ultra-high-performance concrete is proposed by the prior researchers, and the principle is that the mechanical properties of the ultra-high-performance concrete, such as ultra-high bending strength, high toughness, high durability and the like, are utilized to improve the rigidity and tensile strength of a bridge deck structure layer, so that the common quality problems of fatigue failure of a steel bridge deck steel structure and extremely easy damage of bridge deck pavement are solved; however, in the existing design of the steel-ultra high performance concrete light combined bridge deck structure, short stud connectors are mostly adopted, the densely distributed short stud connectors are inconvenient to install, the welding quality has a large influence on the connection performance, and the intensive fusion penetration welding reduces the fatigue performance of the steel bridge deck.
The publication number of CN112554054A discloses a combined bridge deck structure of a large-span bridge and a construction method thereof, wherein the combined bridge deck structure comprises: an orthotropic plate; an ultra-high performance concrete layer laid on the orthotropic plate; connecting assembly buried in an ultra-high performance concrete layer, comprising: the steel plate groups are distributed at intervals along the transverse bridge direction, each steel plate group comprises a plurality of steel plates distributed at intervals along the bridge direction, the bottoms of the steel plates are fixedly connected to the orthotropic plates, and the tops of the steel plates are provided with a plurality of open grooves distributed at intervals along the bridge direction; the shear nails are vertically arranged on the orthotropic plate; the single-layer reinforcing mesh comprises a plurality of first transverse reinforcing steel bars and a plurality of longitudinal reinforcing steel bars, wherein the first transverse reinforcing steel bars and the longitudinal reinforcing steel bars are arranged in a criss-cross mode, and the first transverse reinforcing steel bars are placed in the open grooves.
Although the technical scheme can improve the local mechanical property and the overall mechanical property of the orthotropic plate, in the increasing building requirements, when the steel plate group and the transverse steel bars are fixedly installed, each transverse steel bar needs to be positioned and installed, the construction efficiency is low, and the installation precision is easily influenced when the transverse steel bars are installed.
Disclosure of Invention
The utility model aims at the problem that prior art exists, provide a can realize steel-UHPC combination bridge floor system of quick accurate installation, not only can promote through the connecting plate cooperation reinforcing bar that shears, the curved performance of drawing, make steel-concrete interface connection more reliable, carry out accurate installation through major-minor notch moreover, improve the efficiency of construction.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a can realize steel-UHPC combination bridge floor system of quick accurate installation, includes steel decking, steel decking upper berth is equipped with the UHPC thin layer, steel decking with vertical interval is equipped with a plurality of connecting plates that shear between the UHPC thin layer, be equipped with the main notch and the vice notch that a plurality of levels interval arranged on the connecting plate that shears, vice notch with main notch central symmetry arranges, and all peg graft in main notch and the vice notch has horizontal muscle, still be equipped with many vertical muscle between steel decking and the UHPC thin layer.
The shear-resistant connecting plate is provided with the main notches and the auxiliary notches so as to be convenient for realizing the fixed connection of the transverse ribs and the shear-resistant connecting plate, the shear resistance and the bending tension performance are further improved, the steel-concrete interface connection is more reliable, and meanwhile, the main notches and the auxiliary notches can be used for carrying out accurate positioning, so that the mounting precision and the construction efficiency are effectively improved, and the requirement of rapid construction is met; the steel-UHPC combined bridge deck has the advantages of small building height, good bidirectional bending and pulling performance, high bearing capacity of the steel-concrete interface connecting piece, excellent fatigue performance, small influence degree of the connection performance by welding quality, convenience in installation and construction and capability of supporting automatic mechanical production to a large extent.
Optionally, the main notch and the auxiliary notch are arranged at different heights, the plurality of longitudinal ribs are located between the two layers of transverse ribs at different heights, and the longitudinal ribs and the two layers of transverse ribs form a three-layer reinforcement system.
Through the mutual cooperation of three-layer reinforcing bar, effectually play the reinforcing action to UHPC layer, this simple structure simultaneously, construction convenience.
Optionally, the adjacent distance between the transverse rib and the longitudinal rib is 50mm to 120mm, the diameter of the transverse rib is 10mm to 16mm, and the diameter of the longitudinal rib is 8mm to 12mm.
Through setting up the determining deviation in order to avoid too closely leading to concrete material to pour incompact, make again simultaneously not too sparsely between the reinforcing bar, guarantee the reinforcing effect of reinforcing bar net to the UHPC thin layer.
Optionally, the inner diameter of the primary slot is larger than the inner diameter of the secondary slot.
The main notch is a larger groove-shaped opening in the continuous steel plate or is formed by arranging the segmented steel plates according to a certain gap, the auxiliary notch is a smaller gap in the continuous steel plate, the ultra-high performance concrete tenon and the transverse through reinforcing steel bar in the notch provide main shearing resistance, and the transverse through reinforcing steel bar in the auxiliary notch plays a role of a positioning bracket, so that the shearing resistance and the bending and pulling performance are further improved.
Optionally, the shear connection plate is an open-pore steel plate with a low profile height, the height of the shear connection plate is 40 mm-90 mm, and the thickness of the shear connection plate is 8 mm-14 mm.
The shearing resistant steel plate has smaller height so as to meet the requirements of being embedded in the UHPC thin layer and having a certain protective layer thickness, and simultaneously can ensure the strengthening effect on the UHPC layer.
Optionally, the thickness of the UHPC thin layer is 50-100 mm, and the net protective layer embedded in the UHPC thin layer of the shear-resistant connecting plate is greater than or equal to 10mm.
Can prevent effectively through the protective layer that connecting plate and internal reinforcement that shear receive external striking and lead to warping, the protective layer can also protect the connecting plate that shears not rusted simultaneously. .
Optionally, the widths of the main notch and the auxiliary notch are 1.2-2.0 times of the diameter of the transverse bar, and the depths of the main notch and the auxiliary notch meet the requirement that the minimum protective layer thickness after the transverse through bar is installed is greater than or equal to 10mm.
The reinforcing steel bar transmits uniform force to the concrete through the protective layer, so that the reinforcing steel bar is prevented from being corroded due to premature cracks, insufficient stress of the reinforcing steel bar and large invasion of water and carbon dioxide.
The shear connection plate is directly welded on the steel bridge deck plate through a fillet weld.
The preparation work before fillet weld is simple; edge machining is not needed and assembly is convenient; high-current welding can be used, the deposition efficiency is high, and the cost is relatively low.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the shear-resistant connecting plate is provided with the main notches and the auxiliary notches so as to be convenient for realizing the fixed connection of the transverse ribs and the shear-resistant connecting plate, the shear resistance and the bending tension performance are further improved, the steel-concrete interface connection is more reliable, and meanwhile, the main notches and the auxiliary notches can be used for carrying out accurate positioning, so that the mounting precision and the construction efficiency are effectively improved, and the requirement of rapid construction is met; the steel-UHPC combined bridge deck has the advantages of small building height, good bidirectional bending and pulling performance, high bearing capacity of a steel-concrete interface connecting piece, excellent fatigue performance, small influence degree of welding quality on the connecting performance, convenience in installation and construction and capability of supporting automatic mechanical production to a large extent;
2. the main notch is a larger groove-shaped opening in the continuous steel plate or is formed by arranging segmented steel plates according to a certain gap, the auxiliary notch is a smaller gap in the continuous steel plate, the ultra-high-performance concrete tenon and the transverse through steel bars in the notch provide main shearing resistance, and the transverse through steel bars in the auxiliary notch play a role of a positioning bracket, so that the shearing resistance and the bending and pulling performance are further improved.
Drawings
FIG. 1 is a schematic structural view of a steel-UHPC combined bridge deck system according to the present invention;
FIG. 2 is a partial schematic view of the steel-UHPC composite bridge deck system of the present invention;
FIG. 3 is a cross-sectional view of FIG. 2;
FIG. 4 is a plan view of the steel-UHPC composite deck system of the second embodiment;
FIG. 5 is a schematic partial view of a steel-UHPC composite deck system according to a second embodiment;
FIG. 6 is a cross-sectional view of FIG. 5;
in the figure: 1. a steel deck plate; 2. a shear connection plate; 3. transverse ribs; 4. longitudinal ribs; 5. a main notch; 6. a secondary slot opening; 7. a thin layer of UHPC.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The first embodiment is as follows:
with reference to fig. 1-3, a steel-UHPC combined bridge deck system capable of realizing rapid and accurate installation comprises a steel bridge deck 1, a UHPC thin layer 7 is laid on the steel bridge deck 1, a plurality of shear connection plates are vertically arranged between the steel bridge deck 1 and the UHPC thin layer 7 at intervals, a plurality of main slots 5 and auxiliary slots 6 which are horizontally arranged at intervals are arranged on the shear connection plates, the auxiliary slots 6 are symmetrically arranged with the centers of the main slots 5, transverse ribs 3 are inserted into the main slots 5 and the auxiliary slots 6, and a plurality of longitudinal ribs 4 are also arranged between the steel bridge deck 1 and the UHPC thin layer 7; the shear-resistant connecting plate is provided with the main notches 5 and the auxiliary notches 6 so as to realize the fixed connection of the transverse ribs 3 and the shear-resistant connecting plate, the shear resistance and the bending tension performance are further improved, the steel-concrete interface connection is more reliable, meanwhile, the main notches 5 and the auxiliary notches 6 can be used for carrying out accurate positioning, the mounting precision and the construction efficiency are effectively improved, and the requirement for rapid construction is met; the steel-UHPC combined bridge deck has the advantages of small building height, good bidirectional bending and pulling performance, high bearing capacity of the steel-concrete interface connecting piece, excellent fatigue performance, small influence degree of welding quality on the connecting performance, convenience in installation and construction and support for automatic mechanical production to a large extent.
The steel bridge deck slab 1 is made of Q345 steel, the thickness is controlled to be 10-14mm, the UHPC thin layer 7 is made of active powder concrete with 2% of steel fiber volume, the thickness is controlled to be 70-80 mm, the diameter of a circular opening of a main notch 5 is 30-40 mm, the width of the notch is 18-20 mm, the width of an auxiliary notch 6 is 15-18 mm, the depth is 15-18 mm, the auxiliary notches 6 and the main notch 5 are staggered, namely the distance between the central lines of the main notch 5 and the auxiliary notch 6 is 50-80 mm, the distribution direction of shear-resistant steel plates is the longitudinal bridge direction, the transverse bridge direction is arranged in parallel for multiple rows, and the distance is controlled to be 400-600 mm.
The diameter of the transverse ribs 3 and the diameter of the longitudinal ribs 4 are both 10-12 mm, the concrete material is prevented from being poured loosely due to over-dense arrangement of a certain distance, meanwhile, the reinforcing steel bars are not too sparse, and the reinforcing effect of the reinforcing mesh on the UHPC thin layer 7 is guaranteed.
The inner diameter of the primary slot 5 is larger than the inner diameter of the secondary slot 6. The main notch 5 is a larger notch opening in the continuous steel plate or is formed by arranging segmented steel plates according to a certain gap, the auxiliary notch 6 is a smaller notch in the continuous steel plate, the ultra-high performance concrete tenon and the transverse through steel bar in the notch provide main shear resistance, and the transverse through steel bar in the auxiliary notch 6 plays a role of a positioning bracket, so that the shear resistance and the bending and pulling performance are further improved.
The anti-shearing connecting plate is an open pore steel plate with low profile height, the height of the anti-shearing connecting plate is 60-70 mm, the thickness of the anti-shearing connecting plate is 10-14 mm, and the height of the anti-shearing steel plate is smaller so as to meet the requirement that the anti-shearing connecting plate can be embedded in the UHPC thin layer 7 and has a certain protective layer thickness and simultaneously ensure that the UHPC layer can be reinforced.
The thickness of the UHPC thin layer 7 is 100mm, the net protective layer of the anti-shearing connecting plate embedded in the UHPC thin layer 7 is 10-20 mm, the deformation of the anti-shearing connecting plate and the internal reinforcing steel bar caused by external impact can be effectively prevented through the protective layer, and meanwhile, the anti-shearing connecting plate can be protected from being rusted. .
The notch width of main notch 5 and vice notch 6 is 2 times of 3 diameters of horizontal muscle, and the notch degree of depth of main notch 5 and vice notch 6 satisfies the minimum protective layer thickness that transversely runs through behind the reinforcing bar installation and is greater than or equal to 10mm, and the reinforcing bar will pass to the concrete through the protective layer to the uniform force in, prevent too early crack, reinforcing bar can not fully atress and water and carbon dioxide invasion in a large number and lead to corrosion reinforcing bar.
The shear-resistant connecting plate is directly welded on the steel bridge deck plate 1 through the fillet weld, and the preparation work before the fillet weld is simple; edge machining is not needed and assembly is convenient; high-current welding can be used, the deposition efficiency is high, and the cost is relatively low.
In this embodiment, the reinforcing mesh is prefabricated before installation, manual binding can be adopted in small-scale production, and automatic high-speed production can be completed by using numerical control equipment in large-scale production. When the steel panel is installed, a part of transverse penetrating steel bars are clamped into the auxiliary notches 6 for positioning, namely, the accurate installation of the penetrating steel bars and other distributed steel bars in the main notches 5 is completed, and then the UHPC thin layer 7 can be poured on the steel panel.
Example two:
referring to fig. 4-6, in the present embodiment, the main notches 5 and the auxiliary notches 6 of two adjacent shear connection plates 2 are arranged in a staggered manner, the height of the shear connection plate 2 is controlled to be 40 mm-60 mm, the thickness is controlled to be 10 mm-14 mm, and the thickness of the net protection layer is 10 mm-15 mm. The main notch 5 is formed by arranging segmented steel plates at certain intervals, the width of the upper part of the notch is 18-20 mm, the width of the lower part of the notch is 40-90 mm, the diameter of the corresponding transverse penetrating steel bar is 10-16 mm, and the main notch is arranged on the central line of the notch. The width of the auxiliary notch 6 is 15 mm-18 mm, the depth is 15 mm-18 mm, the bottom of the notch is arc-shaped, and the diameter of the corresponding transverse penetrating steel bar is 10 mm-12 mm. The distance between the center lines of the adjacent main slot openings 5 and the auxiliary slot openings 6 or the distance between the center lines of the adjacent auxiliary slot openings 6 is 50-80 mm.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The steel-UHPC combined bridge deck system capable of realizing quick and accurate installation is characterized by comprising a steel bridge deck plate, wherein a UHPC thin layer is paved on the steel bridge deck plate, a plurality of shear-resistant connecting plates are vertically arranged between the steel bridge deck plate and the UHPC thin layer at intervals, a plurality of main notches and auxiliary notches which are horizontally arranged at intervals are arranged on the shear-resistant connecting plates, the auxiliary notches are symmetrically arranged at the center of the main notches, transverse ribs are inserted into the main notches and the auxiliary notches, and a plurality of longitudinal ribs are arranged between the steel bridge deck plate and the UHPC thin layer.
2. The steel-UHPC combined bridge deck system capable of realizing quick and accurate installation according to claim 1, wherein the main notch and the auxiliary notch are arranged at different heights, a plurality of longitudinal ribs are positioned between two layers of transverse ribs at different heights, and the longitudinal ribs and the two layers of transverse ribs form a three-layer reinforcement system.
3. A steel-UHPC combined bridge deck system capable of realizing rapid and accurate installation according to claim 1, wherein the adjacent distance between the transverse ribs and the longitudinal ribs is 50-120 mm, the diameter of the transverse ribs is 10-16 mm, and the diameter of the longitudinal ribs is 8-12 mm.
4. A steel-UHPC combined bridge deck system capable of achieving rapid and accurate installation according to claim 1, wherein the inner diameter of the primary rebate is larger than the inner diameter of the secondary rebate.
5. The steel-UHPC combined bridge deck system capable of realizing rapid and accurate installation according to claim 1, wherein the shear connection plates are open-cell steel plates with low-profile height, the height of the shear connection plates is 40-90 mm, and the thickness of the shear connection plates is 8-14 mm.
6. The steel-UHPC combined bridge deck system capable of realizing rapid and accurate installation according to claim 1, wherein the thickness of the UHPC thin layer is 50-100 mm, and the net protective layer thickness of the shear connection plate embedded in the UHPC thin layer is more than or equal to 10mm.
7. The steel-UHPC combined bridge deck system capable of realizing rapid and accurate installation according to claim 1, wherein the width of the main notch and the auxiliary notch is 1.2-2.0 times of the diameter of the transverse reinforcement, and the depth of the main notch and the auxiliary notch satisfies that the minimum protective layer thickness after the transverse through reinforcement is installed is greater than or equal to 10mm.
8. A steel-UHPC composite bridge deck system capable of achieving rapid and accurate installation according to claim 1, wherein the shear connection plates are welded directly to the steel deck slab by fillet welds.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220627520.5U CN217601203U (en) | 2022-03-22 | 2022-03-22 | Steel-UHPC combined bridge deck system capable of realizing rapid and accurate installation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220627520.5U CN217601203U (en) | 2022-03-22 | 2022-03-22 | Steel-UHPC combined bridge deck system capable of realizing rapid and accurate installation |
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| CN217601203U true CN217601203U (en) | 2022-10-18 |
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| CN202220627520.5U Active CN217601203U (en) | 2022-03-22 | 2022-03-22 | Steel-UHPC combined bridge deck system capable of realizing rapid and accurate installation |
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