Prestress assembly type combined bridge deck slab

Abstract

The utility model relates to the technical field of bridge structures, in particular to a prestress assembly type combined bridge deck slab. Comprising a panel, a plurality of supporting beams, a longitudinal reinforcing structure and a transverse reinforcing structure, the supporting beams are welded and fixed to the lower end face of the panel, the supporting beams are arranged in a criss-cross mode, and the supporting beams are fixedly connected with beret pieces below through connecting structures; the longitudinal reinforcing structure comprises a longitudinal reinforced concrete beam; a first finish rolling deformed steel bar is arranged in the longitudinal reinforced concrete beam in a penetrating manner along the longitudinal direction; the first finish rolling deformed steel bars penetrate through the supporting beams intersected with the first finish rolling deformed steel bars and are tensioned to a first set prestress value in the longitudinal direction; the transverse reinforcing structure comprises a transverse reinforced concrete beam; second finish rolling deformed steel bars arranged in the transverse direction are arranged in the transverse reinforced concrete beams in a penetrating mode. And the second finish rolling deformed steel bars penetrate through the supporting beams intersecting with the second finish rolling deformed steel bars and are tensioned to a second set prestress value in the transverse direction. The bridge deck slab is simple in structure and low in manufacturing cost, and the bearing capacity of the whole bridge deck slab is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge structures, in particular to a prestressed assembled composite bridge deck. Background Art

[0002] With the gradual acceleration of my country's infrastructure construction, the speed of high-speed rail has been increased, and the construction of expressway networks has been intensified. Small construction machinery and equipment can no longer meet the current construction needs. The use of large-scale construction machinery and equipment has become the key to project construction. Steel trestles and steel platforms play a key role in the transportation and use of large-scale machinery and equipment, and are the only way for large equipment to reach the site. At the same time, building steel trestles is the main method of crossing ditches, valleys, and rivers, and building steel platforms is the main platform for drilling holes for bridge pile foundations and temporary stacking of materials.

[0003] During the construction process, the existing steel trestles and steel platforms are often affected by factors such as overloading of the bridge and inadequate maintenance, which leads to serious deformation of the steel trestles themselves. In particular, the bridge deck directly bears the alternating loads of wheels and tracks for a long time, which causes deformation of the bridge deck. This not only affects the appearance of the bridge deck, but also greatly reduces the bearing capacity of the bridge. This poses a hidden danger to normal traffic, driving and construction safety. In addition, for the construction of bored cast-in-place piles on steel platforms, the spacing between the Bailey plates on both sides of the cast-in-place piles is large, resulting in a large span of the bridge deck. The bearing capacity of ordinary bridge decks is far from meeting the construction requirements. Utility Model Content

[0004] The purpose of the utility model is to solve the deficiencies of the above-mentioned background technology and provide a prestressed assembled composite bridge deck.

[0005] The technical solution of the utility model is: a prestressed assembled composite bridge deck, comprising:

[0006] A panel, wherein the panel is a flat plate arranged in a horizontal direction and serving as a bridge deck;

[0007] A plurality of support beams, wherein the support beams are welded and fixed to the lower end surface of the panel, the plurality of support beams are arranged in a crisscross pattern, and the support beams are fixedly connected to the Bailey sheet below through a connecting structure;

[0008] A longitudinal reinforcement structure, the longitudinal reinforcement structure comprising a plurality of longitudinal reinforced concrete beams arranged longitudinally under the panel; the longitudinal reinforced concrete beams are provided with first fine-rolled threaded steel bars arranged longitudinally; the first fine-rolled threaded steel bars pass through a support beam intersecting therewith and are tensioned longitudinally to a first set prestress value;

[0009] A transverse reinforcement structure, the transverse reinforcement structure includes a plurality of transverse reinforced concrete beams arranged transversely under the panel; the transverse reinforced concrete beams are penetrated by a second fine-rolled threaded steel bar arranged transversely; the second fine-rolled threaded steel bar passes through a supporting beam intersecting therewith and is tensioned transversely to a second set prestress value.

[0010] According to a prestressed assembled composite bridge deck provided in the present application, the longitudinal reinforcement structure includes two pieces of first channel steels; one side flange of the first channel steel is welded to the deck, and the notches of the two pieces of first channel steels are arranged opposite to each other to form a channel structure for accommodating the first fine-rolled threaded steel bars; concrete is poured in the channel structure formed by the two pieces of first channel steels.

[0011] According to a prestressed assembled composite bridge deck provided by the present application, the transverse reinforcement structure includes two pieces of second channel steels; one side flange of the second channel steel is welded to the deck, and the notches of the two pieces of second channel steels are arranged opposite to each other to form a channel structure for accommodating the second fine-rolled threaded steel bars; concrete is poured in the channel structure formed by the two pieces of second channel steels.

[0012] According to a prestressed assembled composite bridge deck provided by the present application, the supporting beams include multiple longitudinal beams, multiple transverse beams and multiple side beams; the longitudinal beams are I-beams arranged along the longitudinal direction, the flanges at the upper ends of the longitudinal beams are welded to the deck, and the multiple longitudinal beams are arranged at equal intervals in the horizontal transverse direction; the transverse beams are I-beams arranged along the transverse direction, the flanges at the upper ends of the transverse beams are welded to the deck, and the multiple transverse beams are arranged at intervals in the horizontal longitudinal direction; the side beams are channel steels with notches facing inwards, and the side beams are fixed to the ends of the transverse beams and the longitudinal beams.

[0013] According to a prestressed assembled composite bridge deck provided in the present application, the connection structure comprises:

[0014] A connecting plate, wherein the connecting plate is arranged between adjacent beams, and both ends of the connecting plate are pressed tightly on the flange plates between the adjacent beams;

[0015] The connecting bolts pass through the connecting plate and the upper chord of the Bailey plate from top to bottom to fix the crossbeam on the Bailey plate.

[0016] A prestressed assembled composite bridge deck provided in the present application also includes a guardrail; the guardrail is fixed to the side beams on both sides in the lateral direction by a bolt structure.

[0017] The advantages of the present application are as follows: 1. The bridge deck of the present application is a combined structure formed by welding a support beam and a panel. By installing a reinforced concrete beam structure with prestressed fine-rolled threaded steel bars on the panel and the support beam, the structural strength and rigidity of the entire bridge deck can be effectively enhanced, and the bearing capacity of the bridge deck can be greatly improved. The bridge deck is not easy to deform, the use condition is good, the service life is greatly improved, and the safety of the bridge deck passage is greatly improved;

[0018] 2. The longitudinal reinforcement structure of the present application forms a casting mold for a longitudinal reinforced concrete beam by arranging two first channel steels in parallel, which can greatly improve the structural strength of the entire longitudinal reinforced concrete beam and facilitate the construction of the first fine-rolled threaded steel bar. The construction is very simple and the operation is very convenient.

[0019] 3. The transverse reinforcement structure of the present application is to construct a transverse reinforced concrete beam on the panel. Two second channel steels form a casting mold for the transverse reinforced concrete beam, which greatly facilitates the arrangement of the second fine-rolled threaded steel bars, making the installation of the second fine-rolled threaded steel bars extremely convenient and easy to construct;

[0020] 4. The support beams of the present application include longitudinal beams, transverse beams and side beams, and the selected beams are I-beams and channel steels which are very easy to obtain at the construction site. The support beams are structures welded on the panels, which are simple to construct, low in overall cost, and easy to process and produce;

[0021] 5. The connection structure of the bridge deck to the Bailey sheet in the present application is extremely simple. The bridge deck can be stably fixed to the Bailey sheet by pressing the flange plate of the longitudinal beam through the connection plate and then tightening the connection bolts. The overall installation structure is simple and the construction is convenient.

[0022] 6. This application installs guardrails on the side beams on both sides of the bridge deck. The guardrails are very easy to install and can improve the safety of the bridge deck.

[0023] The bridge deck of the present application has a simple structure, is very convenient to construct, and is low in cost. By adding prestressed reinforced concrete beams, the bridge deck can effectively improve the bearing capacity of the entire bridge deck and effectively avoid deformation of the bridge deck, which has great promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 : A schematic top view of the bridge deck of the present application;

[0025] Figure 2 :This application Figure 1 1-1 view of;

[0026] Figure 3 :This application Figure 1 2-2 view of;

[0027] Figure 4 : Schematic diagram of the bridge deck and Bailey plate installation structure of the present application;

[0028] Among them: 1—panel; 2—Bailey plate; 3—first fine-rolled threaded steel; 4—second fine-rolled threaded steel; 5—first channel steel; 6—second channel steel; 7—longitudinal beam; 8—cross beam; 9—side beam; 10—connecting plate; 11—connecting bolt; 12—guardrail. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] The utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] The present application relates to a prestressed assembled composite bridge deck. The bridge deck of the present application is a unit component structure. In actual application, each group of bridge decks is fixed on Bailey plates, and then adjacent bridge decks are connected in sequence along the longitudinal direction to form a bridge body and deck structure. The bridge deck of the present application is strengthened by setting prestressed reinforced concrete beams by the "pre-tensioning method", which can effectively improve the structural strength of the bridge deck, greatly improve the bearing capacity of the entire bridge deck, and the bridge deck is not easy to deform. The use condition is good, the service life is greatly improved, and the safety of the bridge deck passage is greatly improved.

[0034] Specifically, Figures 1 to 4As shown, the prestressed assembled composite bridge deck of the present application includes a deck 1, multiple support beams, a longitudinal reinforcement structure and a transverse reinforcement structure. The deck 1 is a flat plate arranged horizontally as a bridge deck. The deck 1 is the uppermost structure of the entire bridge deck. The subsequent equipment and personnel passing on the bridge deck all use the deck 1 as a bearing basis. The deck 1 of the present application is a patterned steel plate with a thickness of 8 mm (not limited to this thickness). The patterned steel plate can enhance friction and avoid slipping; the support beams are welded and fixed to the lower end surface of the deck 1, and the multiple support beams are arranged in a criss-cross manner. The support beams are fixedly connected to the Bailey sheet 2 below through a connecting structure. The support beams are arranged in an interlaced manner to form a skeleton structure supported under the panel 1; the longitudinal reinforcement structure includes a plurality of longitudinal reinforced concrete beams arranged longitudinally under the panel, and the longitudinal reinforced concrete beams are provided with a first fine-rolled threaded steel bar 3 arranged longitudinally, and the first fine-rolled threaded steel bar 3 passes through the support beams intersecting therewith and is tensioned longitudinally to a first set prestress value; the transverse reinforcement structure includes a plurality of transverse reinforced concrete beams arranged transversely under the panel, and the transverse reinforced concrete beams are provided with a second fine-rolled threaded steel bar 4 arranged transversely, and the second fine-rolled threaded steel bar 4 passes through the support beams intersecting therewith and is tensioned transversely to a second set prestress value.

[0035] The longitudinal reinforcement structure and transverse reinforcement structure of the present application include the prestressed reinforced concrete beam. This part of the beam is directly fixed on the lower end surface of the panel 1 and is also connected to the above-mentioned supporting beam. The supporting beam, prestressed reinforced concrete beam and panel 1 form an integral structure. The prestressed reinforced concrete beam can effectively enhance the structural strength of the bridge panel, improve its bearing capacity, and is not prone to deformation during long-term use.

[0036] During actual construction: fix the first fine-rolled rebar 3 and the second fine-rolled rebar 4 in the tooling pedestal; install the support beam, and spot weld the support beam on the panel 1 according to the set direction and position; fix the tooling pedestal, prepare the jack for single-end tensioning, and the prestressed construction adopts the "pre-tensioning method". Single-end tensioning is performed on the first fine-rolled rebar 3 and the second fine-rolled rebar 4 according to the set prestressing force, and the first fine-rolled rebar 3 and the second fine-rolled rebar 4 are temporarily anchored on the tooling pedestal; after the tensioning is completed, C30 concrete is poured on it to form a prestressed reinforced concrete beam; after the concrete strength reaches 80% of the design value, the prestressing is released, and the release should be carried out according to the set requirements (the second fine-rolled threaded steel bar 4 should be released symmetrically); after the release, a cold-cut steel bar cutting machine is used to cut off the protruding parts of the first fine-rolled threaded steel bar 3 and the second fine-rolled threaded steel bar 4; the side position of the bridge deck is sealed, and a robot is used for welding to produce a finished bridge deck; the finished bridge deck is cured at a constant temperature of 25℃±2℃ for 7 days and then used for steel trestles and steel platforms.

[0037] In some embodiments of the present application, the longitudinal reinforcement structure and the transverse reinforcement structure are optimized. Specifically, Figures 1 to 4 As shown, the longitudinal reinforcement structure includes two first channel steels 5, one side flange of the first channel steel 5 is welded to the panel 1, and the notches of the two first channel steels 5 are arranged opposite to each other to form a channel structure for accommodating the first fine-rolled threaded steel 3, and concrete is poured in the channel structure formed by the two first channel steels 5.

[0038] The longitudinal reinforced concrete beam of this embodiment is a combination structure of two first channel steels 5, first fine-rolled threaded steels 3 and concrete. During construction, the two first channel steels 5 are first assembled together in a manner in which the notches are relative to each other, and then welded as a whole to the panel 1 to form a hollow cavity channel with openings at both ends. Then, the first fine-rolled threaded steel 3 is inserted into the hollow channel formed by the two first channel steels 5. Finally, after the first fine-rolled threaded steel 3 is tensioned, concrete is poured into the hollow channel formed by the two first channel steels 5. After the concrete strength reaches the standard, the first fine-rolled threaded steel 3 is released.

[0039] The transverse reinforcement structure includes two pieces of second channel steel 6, one side flange of the second channel steel 6 is welded to the panel 1, and the notches of the two pieces of second channel steel 6 are arranged opposite to each other to form a channel structure for accommodating the second fine-rolled threaded steel 4, and concrete is poured in the channel structure formed by the two pieces of second channel steel 6.

[0040] The transverse reinforcement structure of this embodiment includes a transverse reinforced concrete beam, which includes two pieces of second channel steel 6. The notches of the two pieces of second channel steel 6 are arranged relatively to form a hollow cavity channel with openings at both ends, and the second fine-rolled threaded steel 4 is inserted into the hollow cavity channel formed by the two pieces of second channel steel 6. During construction, the two pieces of second channel steel 6 are first welded to the panel 1 to form a hollow cavity channel, and then the second fine-rolled threaded steel 4 is inserted into the hollow cavity channel, and the second fine-rolled threaded steel 4 is tensioned. After the tension reaches the designed prestress, concrete is poured into the hollow cavity channel formed by the two pieces of second channel steel 6. Finally, after the concrete strength reaches the standard, the second fine-rolled threaded steel 4 is released.

[0041] In other embodiments of the present application, the present embodiment optimizes the above-mentioned support beam structure. Specifically, Figures 1 to 3 As shown, the support beam includes multiple longitudinal beams 7, multiple transverse beams 8 and multiple side beams 9. The longitudinal beam 7 is an I-beam arranged along the longitudinal direction. The flange of the upper end of the longitudinal beam 7 is welded to the panel 1. The multiple longitudinal beams 7 are arranged at equal intervals in the horizontal transverse direction. The transverse beam 8 is an I-beam arranged along the transverse direction. The flange of the upper end of the transverse beam 8 is welded to the panel 1. The multiple transverse beams 8 are arranged at intervals in the horizontal longitudinal direction. The side beam 9 is a channel steel with a notch facing inward. The side beam 9 is fixed to the ends of the transverse beam 8 and the longitudinal beam 7.

[0042] The supporting beams include a plurality of longitudinal beams 7, a plurality of transverse beams 8 and a plurality of side beams 9. The supporting beams are all made of I-beams and channel steel structures commonly found on construction sites. Such structures are inexpensive, portable and easy to process, and the cost of the entire bridge deck is greatly reduced.

[0043] During actual processing, the panel 1 is first placed on the processing station, and then the longitudinal beam 7, the transverse beam 8 and the side beam 9 are arranged on the panel 1 according to the set position. The upper flange of the longitudinal beam 7 is welded to the panel 1, and the upper flange of the transverse beam 8 is welded to the panel 1. The longitudinal beams 7 and the transverse beams 8 are arranged in a criss-cross manner, and then the side beams 9 are used to seal the outermost side of the bridge panel. The notches of the side beams 9 face the inner side of the bridge panel and are welded and fixed to the ends of the longitudinal beams 7 and the transverse beams 8. Similarly, the upper flanges of the side beams 9 are also welded to the panel 1.

[0044] The bridge deck of this embodiment is fixed to the Bailey sheet 2 by a connecting structure, such as Figure 4 As shown, the connection structure of this embodiment includes a connecting plate 10 and a connecting bolt 11. The connecting plate 10 is arranged between the beams 8, and the two ends of the connecting plate 10 are pressed against the flange plates between adjacent beams 8; the connecting bolt 11 passes through the connecting plate 10 and the upper chord of the Bailey plate 2 from top to bottom to fix the beam 8 on the Bailey plate 2.

[0045] During actual installation, the formed bridge deck is transported to the Bailey plate 2 for installation, the deck 2 of the bridge deck is facing upward, the longitudinal beam 7 of the bridge deck is placed on the Bailey plate 2, and then the connecting plate 10 is arranged between adjacent cross beams 8, and the connecting bolts 11 are passed through the connecting plate 10. The connecting bolts 11 pass through the connecting plate 10 and the upper chord of the Bailey plate 2 in turn to fix the longitudinal beam 7 on the Bailey plate 2.

[0046] In addition, in this embodiment, guardrails 12 are provided on both lateral sides of the bridge deck, and the guardrails 12 are fixed to the side beams 9 on both lateral sides by bolt structures. The guardrails 12 are fixed to the side beams 9 on both lateral sides of the bridge deck by bolt structures directly after the bridge deck is installed on the Bailey sheet 2.

[0047] In actual production, the first fine-rolled rebar 3 and the second fine-rolled rebar 4 are fixed in the tooling pedestal, including one first fine-rolled rebar 3 and two second fine-rolled rebars 4; the support beam is installed, and the longitudinal beam 7, the cross beam 8 and the side beam 9 are spot welded on the panel 1 according to the set direction and position; the tooling pedestal is fixed, and the jack is prepared for single-end tensioning, and the first fine-rolled rebar 3 and the second fine-rolled rebar 4 are temporarily anchored on the tooling pedestal, and the first fine-rolled rebar 3 and the second fine-rolled rebar 4 are tensioned at one end according to the set prestress, and the prestressing tensioning force of the first fine-rolled rebar 3 is 100kN, and the prestressing tensioning force of the second fine-rolled rebar 4 is 150kN; after the tensioning is completed, C30 concrete is poured on the first fine-rolled threaded steel bar 3 and the second fine-rolled threaded steel bar 4 to form a prestressed reinforced concrete beam; after the concrete strength reaches 80% of the design value, the prestressing is released, and the release should be carried out according to the set requirements, and the two second fine-rolled threaded steel bars 4 are released symmetrically; after the release, the protruding parts of the first fine-rolled threaded steel bar 3 and the second fine-rolled threaded steel bar 4 are cut off by a cold-cut steel bar cutting machine; the side position of the bridge deck is sealed, and a robot is used for welding to produce a finished bridge deck; the finished bridge deck is cured at a constant temperature of 25℃±2℃ for 7 days and then used for steel trestle and steel platform;

[0048] After the maintenance of the finished bridge deck meets the set requirements, the finished bridge deck is transported to the Bailey plate 2, the panel 1 of the finished bridge deck is buckled onto the Bailey plate 2 with the panel facing upward, the longitudinal beam 7, the cross beam 8 and the side beam 9 are placed on the Bailey plate 2, and the connecting plate 10 is arranged between the adjacent cross beams 8. The connecting bolts 11 are passed through the connecting plate 10, and the connecting bolts 11 are passed through the connecting plate 10 and the upper chord of the Bailey plate 2 in turn to fix the cross beam 8 on the Bailey plate 2, thereby completing the assembly of the finished bridge deck and the Bailey plate 2.

[0049] like Figure 1 As shown, the vertical direction of this application Figure 1 The left and right directions in this application refer to Figure 1 The up and down directions in .

[0050] Use in portrait and landscape orientations The prestressing method is used to apply prestress to the fine-rolled rebar, which improves the load-bearing capacity of the bridge deck. Through calculation, a single 6×1.5m ordinary bridge deck of the same structure can withstand a concentrated load of 150kN and a uniform load of 50kN / m. The bridge deck of this application can increase the bearing capacity to 1.5 times, that is, a concentrated load of 225kN (the concentrated load is the load acting directly above the main beam of the bridge deck) and a uniform load of 75kN / m (the uniform load is the load perpendicular to the main beam). After field tests, a muck truck was used to simulate a concentrated load, a crawler crane was used to simulate a uniform load, the stress of the steel was measured at the main stress position by pasting strain gauges, and the deformation of the bridge deck was measured using a displacement meter. It was concluded that after the load of the new bridge deck reached the theoretical design value, the stress and deformation of the new bridge deck were still within the requirements of the design specifications. Moreover, in a Chongqing Yigang platform project, the bridge deck was used to withstand the drilling operation of a 300t rotary drill, and after one year of use, the bridge deck did not show any non-elastic deformation and its appearance was basically intact.

[0051] The bridge deck of the present application uses advanced robot welding technology + visual recognition system during processing; in order to improve production efficiency, tooling + programming system is used for assembly in the factory, which speeds up the production of bridge decks. According to factory tests, it takes 2 working days to manually produce a bridge deck, while using the new production process, it only takes 0.25 working days to produce a bridge deck.

[0052] The present application reserves a strip hole (and the above-mentioned connection structure) on the inner side of the bridge deck, which is connected to the upper chord of the Bailey plate through a 15cm long M25 high-strength bolt and directly fixed on the Bailey plate. The hole also serves as the hoisting hole of the bridge deck. A hole is drilled at the designed position in the short side direction, and a 5cm long M20 high-strength bolt is welded on the inside of the hole. When installing the guardrail, it is directly bolted to the bolt. At the same time, a process hole is drilled at the designed position in the long side direction to ensure that the bridge deck is connected as a whole in the direction of the bridge during installation, and the bridge deck is further fixed on the Bailey plate.

[0053] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A prestressed assembled composite bridge deck, characterized in that: include: A panel (1), wherein the panel (1) is a flat plate arranged horizontally and serving as a bridge deck; A plurality of support beams, the support beams being welded and fixed to the lower end surface of the panel (1), the plurality of support beams being arranged in a crisscross pattern, and the support beams being fixedly connected to the Bailey sheet (2) below via a connection structure; A longitudinal reinforcement structure, the longitudinal reinforcement structure comprising a plurality of longitudinal reinforced concrete beams arranged longitudinally under the panel; a first fine-rolled threaded steel bar (3) arranged longitudinally is inserted into the longitudinal reinforced concrete beam; the first fine-rolled threaded steel bar (3) passes through a support beam intersecting therewith and is tensioned longitudinally to a first set prestress value; A transverse reinforcement structure, the transverse reinforcement structure comprising a plurality of transverse reinforced concrete beams arranged transversely under the panel; the transverse reinforced concrete beams are penetrated by second fine-rolled threaded steel bars (4) arranged transversely; the second fine-rolled threaded steel bars (4) pass through a support beam intersecting therewith and are tensioned transversely to a second set prestress value.

2. A prestressed assembled composite bridge deck as claimed in claim 1, characterized in that: The longitudinal reinforcement structure comprises two pieces of first channel steel (5); a flange on one side of the first channel steel (5) is welded to the panel (1), and the notches of the two pieces of first channel steel (5) are arranged opposite to each other to form a channel structure for accommodating the first fine-rolled threaded steel (3); concrete is poured in the channel structure formed by the two pieces of first channel steel (5).

3. The prestressed assembled composite bridge deck according to claim 1, characterized in that: The transverse reinforcement structure comprises two pieces of second channel steel (6); a flange on one side of the second channel steel (6) is welded to the panel (1), and the notches of the two pieces of second channel steel (6) are arranged opposite to each other to form a channel structure for accommodating the second fine-rolled threaded steel (4); concrete is poured in the channel structure formed by the two pieces of second channel steel (6).

4. The prestressed assembled composite bridge deck according to claim 1, characterized in that: The support beams include a plurality of longitudinal beams (7), a plurality of transverse beams (8) and a plurality of side beams (9); the longitudinal beams (7) are I-beams arranged in the longitudinal direction, the flanges at the upper ends of the longitudinal beams (7) are welded to the panel (1), and the plurality of longitudinal beams (7) are arranged at equal intervals in the horizontal transverse direction; the transverse beams (8) are I-beams arranged in the transverse direction, the flanges at the upper ends of the transverse beams (8) are welded to the panel (1), and the plurality of transverse beams (8) are arranged at intervals in the horizontal longitudinal direction; the side beams (9) are channel steels with notches facing inwards, and the side beams (9) are fixed to the ends of the transverse beams (8) and the longitudinal beams (7).

5. The prestressed assembled composite bridge deck according to claim 4, characterized in that: The connection structure comprises: A connecting plate (10), wherein the connecting plate (10) is arranged between adjacent cross beams (8), and both ends of the connecting plate (10) are pressed tightly against the flange plates between the adjacent cross beams (8); A connecting bolt (11) passes through the connecting plate (10) and the upper chord of the Bailey plate (2) from top to bottom to fix the crossbeam (8) on the Bailey plate (2).

6. The prestressed assembled composite bridge deck according to claim 4, characterized in that: It also includes a guardrail (12); the guardrail (12) is fixed to the side beams (9) on both sides in the transverse direction through a bolt structure.

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