CN115679848A - Steel temporary bridge system - Google Patents

Abstract

The invention discloses a traffic-protecting steel temporary bridge system which comprises a bridge head approach slope, a supporting beam and a spanning beam, wherein the supporting beam is arranged on a bridge floor at an old bridge abutment, and two ends of the supporting beam are provided with convex limit stops; the supporting beam is at least provided with two reinforcing parts along the length direction, and U-shaped bent bolts are embedded below the reinforcing parts of the supporting beam; supporting beams penetrate through two ends of the bent bolt; the bridge head guide slopes are laid on road surfaces at two ends of the bridge head, the lower end of the inner end of the bridge head guide slopes is provided with a pressing groove with the same appearance as the supporting beam, and the outer end of the supporting beam is embedded in the pressing groove; and two ends of the spanning beam are erected on the supporting beams at the two bridge abutments and are attached to the inner side end of the bridge head leading slope. The temporary load-sharing beam is laid on the original bridge to temporarily reinforce the old bridge, the load-shedding technology is applied to ensure the safety of the overweight vehicle passing through the bridge, the supporting parts are placed at the bridge piers and the abutment of the old bridge, the main beam of the bridge is convenient to bear all live loads of the automobile, and the main beam of the old bridge is not influenced by the live load effect of the automobile.

Description

Steel temporary bridge system

Technical Field

The invention belongs to the technical field of road traffic construction, and particularly relates to a traffic protection steel temporary bridge system.

Background

Road traffic volume in China is increasing continuously, and especially in recent years, with the development of modern industrial construction in China, transportation of extra-large and extra-heavy industrial equipment (such as reactors, generator stators, transformers and the like) by roads is becoming frequent. Wherein, the large-scale equipment in chemical industry, petroleum, electric power, metallurgy, mine and other departments is heavier, and a lot of equipment exceeds more than 100 tons.

With the occurrence of mass transportation of large-size goods, the original bridge cannot meet the requirement of passing the bridge of overweight vehicles in the large-size transportation because the design load grade is limited or the bearing capacity of the original bridge is obviously reduced. Technicians have reinforced a plurality of dangerous and old bridges by using various reconstruction technologies, but because the number of the bridges to be reinforced is large and the investment cost is huge, a plurality of bridges are still in a low bearing capacity state and cannot be reconstructed, so that the large-piece transportation is an obstacle. And it is huge and unrealistic to consolidate all bridges of heavy truck route.

In the prior art, when overweight vehicles pass through a bridge in large transportation, a plurality of initial research achievements and successful examples are available for reinforcing highway bridges in China. For masonry bridges and reinforced concrete bridges, the upper structures are usually reinforced by pressure grouting, mortar spraying, reinforcing of the deck reinforcement, reinforcing of the lower section of the beam, steel plate bonding, longitudinal beam addition, structural system change, prestressing, partial or total girder replacement, etc. However, most of them are permanent reinforcement of bridges and are often used in conventional transportation of large objects. In the traditional methods, the old bridge is detected one by one, and the weak part is reinforced in a targeted manner, so that great investment is made in time, economy and manpower, and because the health condition of the in-service bridge is difficult to identify and evaluate accurately, the effectiveness of various reinforcing methods is controversial.

Therefore, if a steel convenient bridge can be developed to ensure that a special vehicle can safely pass through the bridge under the safe, convenient and economic conditions, remarkable social and economic benefits can be generated.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the utility model provides a guarantee steel temporary bridge for solve when heavy-duty car bridge-crossing load effect surpasss the existing bearing capacity of bridge, original highway bridge can not adapt to the needs of overweight vehicle bridge-crossing in the major transit because the design load grade is on the low side or the bearing capacity of existing old bridge obviously descends.

In order to achieve the technical effects, the technical scheme adopted by the invention is as follows: a kind of steel temporary bridge system of protecting the lead-through, including the bridge head draws the slope, brace summer and crosses over the roof beam, the said brace summer is installed on bridge floor of the old bridge abutment, the brace summer is a concrete prefabricated block, there are protruding limit stops at both ends; the supporting beam is at least provided with two reinforcing parts along the length direction, the center distance between every two adjacent reinforcing parts is 1800mm, each reinforcing part is formed by a steel plate pre-embedded in the supporting beam or criss-cross reinforcing mesh pre-embedded in the supporting beam and fixedly connected with the supporting beam, the length of the steel plate of each reinforcing part is not less than 800mm, the width of the steel plate of each reinforcing part is not less than 75% of the total width of the supporting beam, or the length of the reinforcing mesh is not less than 1080mm, the width of the reinforcing mesh is not less than 90% of the total width of the supporting beam, and a group of U-shaped bent bolts arranged along the width direction of the supporting beam are pre-embedded below the reinforcing parts of the supporting beam; the two ends of the bent bolt penetrate through the supporting beam, the bent bolt is fixedly welded with the steel plate or the reinforcing mesh, and the two bending parts of one group of bent bolts positioned below the same reinforcing part are fixedly welded through two lacing wires respectively; the bridge head guide slopes are laid on road surfaces at two ends of the bridge head, the lower end of the inner end of the bridge head guide slopes is provided with a pressing groove with the same appearance as the supporting beam, and the outer end of the supporting beam is embedded in the pressing groove; the crossing beam comprises an upper bridge deck plate, a bottom connection steel plate and a plurality of I-shaped steels which are fixedly connected with the upper bridge deck plate and the bottom connection steel plate and are arranged in parallel at equal intervals, two ends of the crossing beam are erected on a supporting beam at two bridge abutments and are attached to the inner side end of a bridge head leading slope, the bottom connection steel plate of the crossing beam is fixedly connected with the supporting beam through bent bolts and nuts, the distance between every two adjacent I-shaped steels is not more than 165mm, and the two I-shaped steels are aligned with the corresponding centers of the two groups of bent bolts.

In an alternative, the spanning beam is also provided with a support beam at each pier position.

In an optional scheme, a rubber pad is arranged between the bottom surface of the supporting beam and the old bridge deck, and the rubber pad is a chloroprene rubber pad with the thickness of 10mm.

In an optional scheme, the upper-layer bridge deck slab is a diamond-pattern steel plate, the thickness of the steel plate is 12mm, the thickness of the upper-layer connection steel plate is 20mm, and two adjacent I-shaped steels are fixedly connected through a diaphragm plate welded on the web plate.

In an optional scheme, wheel guard guide angle steels are fixedly arranged at the edges of two sides of the upper deck bridge deck.

In an alternative embodiment, the upper deck plate is provided with wheel guide markings along the bridge run, which are formed by a pigment applied to the upper surface of the upper deck plate and located at the edges of the two sides of the reinforcement.

In an optional scheme, still including detecting warning system, it is equipped with weight detection device to detect warning system, weight detection device installs on bridgehead approach slope outside road surface to outside end apart from bridgehead approach slope has the certain distance, and the inside communication module that is provided with of weight detection device, communication module carries out the communication through pre-buried optic fibre and external control end.

In an optional scheme, the detection reminding system is further provided with a speed measuring and photographing device, and the speed measuring and photographing device is installed on the road surface between the bridge head leading slope and the weight detection device through a support and used for measuring the passing speed of the overweight vehicle, photographing the overweight vehicle and uploading information to the control end.

In an optional scheme, it still is equipped with warning device to detect warning system, warning device passes through the support mounting in the one side of the road surface that is close to bridgehead approach outside end, and warning device is equipped with warning sign, warning light unit to and voice broadcast unit, warning device is used for reminding the driver to have driven into just the bridge area, need carefully to walk slowly.

In an optional scheme, the system further comprises a traffic sign reminding system, wherein the traffic sign reminding system is provided with a manual watching device, an alternative electronic display sign and a traffic guide line sign.

Compared with the prior art, the invention has the beneficial effects that:

the temporary load-sharing beam is laid on the original bridge to temporarily reinforce the old bridge, the load-shedding technology is applied to ensure the safety of the overweight vehicle passing through the bridge, the supporting parts are placed at the bridge piers and the abutment of the old bridge, the main beam of the bridge is convenient to bear all live loads of the automobile, and the main beam of the old bridge is not influenced by the live load effect of the automobile. The invention has the advantages of convenient assembly and disassembly, high safety and good economical efficiency.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the embodiments, and it is apparent that the described embodiments are some, but not all embodiments of the present invention.

Drawings

FIG. 1 is a schematic structural diagram of a security steel temporary bridge system of the invention.

FIG. 2 is a front view of a Baotong steel access bridge system of the present invention.

FIG. 3 is a schematic view of a support beam in example 1;

FIG. 4 is an enlarged view of portion A of FIG. 1;

FIG. 5 is an enlarged view of the portion B of FIG. 2;

FIG. 6 is a schematic view of a connecting structure of adjacent I-shaped steel, a diaphragm plate and a bottom connecting steel plate piece;

FIG. 7 is a schematic plan view of a passthrough steel access bridge system of the present invention in example 4.

The reference numbers and corresponding designations in the drawings are:

a bridge head guide slope 1, a pressure groove 1.1, a supporting beam 2, a limit stop 2.1, a cross beam 3, an upper bridge deck 3.1,

the bottom is connected with a steel plate 3.2, an I-shaped steel 3.3, a reinforcing part 4,

a reinforcing mesh 4.1, a bent bolt 5, a tie bar 6,

a rubber pad 7, a diaphragm plate 8, a guard wheel guide angle steel 9,

a weight detecting device 10, a speed measuring and photographing device 11, a warning device 12,

a manual watching room 13, an electronic display signboard 14 and a traffic guide mark 15.

Detailed Description

Example 1

Referring to fig. 1-6, the temporary bridge system comprises a bridge head approach slope 1, a supporting beam 2 and a cross beam 3. The supporting beam 2 is arranged on the bridge deck at the old bridge abutment, the supporting beam 2 is a concrete precast block, and two ends of the supporting beam are provided with convex limit stops 2.1; the supporting beam 2 is at least provided with two reinforcing parts 4 along the length direction, the center distance between every two adjacent reinforcing parts 4 is 1800mm, and a group of U-shaped bent bolts 5 arranged along the width direction of the supporting beam 2 are embedded below the reinforcing parts 4 of the supporting beam 2; two ends of a bent bolt 5 are penetrated by a supporting beam 2, the bent bolts 5 are welded and fixed with a reinforcing mesh, two bending parts of a group of bent bolts 5 positioned below the same reinforcing part 4 are respectively welded and fixed through two longitudinal tie bars 6, and the aligned bent bolts 5 positioned in different groups are welded and fixed through transverse tie bars 6; the bridge head leading slope 1 is laid on the road surfaces at two ends of the bridge head, the lower end of the inner end of the bridge head leading slope is provided with a pressure groove 1.1 with the same appearance as the supporting beam 2, the outer end of the supporting beam 2 is embedded in the pressure groove 1.1, and the compression joint width of the bridge head leading slope 1 and the supporting beam 2 is 1/4-1/3 of the total width of the supporting beam 2; the spanning beam 3 comprises an upper bridge deck 3.1, a bottom connection steel plate 3.2 and a plurality of I-shaped steels 3.3 which are fixedly connected with the upper bridge deck 3.1 and the bottom connection steel plate 3.2 and are arranged in parallel at equal intervals, two ends of the spanning beam 3 are erected on the supporting beams 2 at two bridge abutments and are in close contact with the inner side ends of the bridge head guide slopes 1, the spanning beam 3 is fixedly connected with the supporting beams 2 through bent bolts 5 and nuts, the distance between every two adjacent I-shaped steels 3.3 is not more than 165mm, and the centers of the two I-shaped steels 3.3 are aligned with the corresponding centers of the two groups of bent bolts 5.

The temporary bridge system is mainly formed by splicing a bridge head approach slope 1, a supporting beam 2 and a spanning beam 3, wherein:

the supporting beam 2 is prefabricated by C35 concrete, and the reinforcing parts 4 formed by internally pre-embedded steel bar nets are structurally reinforced, wherein the length of the steel bar nets is not less than 1080mm, and the width of the steel bar nets is not less than 90% of the total width of the supporting beam 2. In addition, two ends of the supporting beam 2 are provided with limit stoppers 2.1 which protrude upwards, so that the spanning beam 3 can be limited and fixed during subsequent laying, and the spanning beam 3 is prevented from being separated from the supporting beam 2. Besides the reinforcing part 4, bent bolts 5 are embedded in the supporting beam 2, the bent bolts 5 are welded and fixed with the reinforcing mesh, two ends of each bent bolt 5 penetrate upwards to be matched and connected with the bottom connection steel plate of the cross beam 3, and a group of bent bolts 5 below the same reinforcing part 4 are welded and fixed into a whole through tie bars 6.

The span beam 3 is made of an upper bridge deck 3.1, a bottom connection steel plate 3.2 and a clamping I-shaped steel 3.3, in order to meet the bearing requirement and avoid the deformation of a beam surface, the upper bridge deck 3.1 adopts a steel plate with the thickness of 12mm, the bottom connection steel plate 3.2 adopts a steel plate with the thickness of 20mm, and the distance between two adjacent I-shaped steels 3.3 is not more than 165mm. After the spanning beam 3 is hoisted to the supporting beam 2, two ends of the bent bolt 5 penetrate through the bottom connection steel plate 3.2, and then the spanning beam 3 can be fixed by matching nuts.

The bridgehead guided slope 1 is of a right-angled triangle structure and is influenced by the climbing capacity of the overweight vehicle, and the gradient of the bridgehead guided slope 1 is preferably controlled below 15 degrees. In addition, through designing indent 1.1 at its right angle position, bridgehead approach slope 1 can compress tightly supporting beam 2 in old bridge abutment department, improves the stability of installation.

The construction process of the traffic-protecting steel temporary bridge system is as follows:

1. acquiring corresponding size data of the old bridge;

2. corresponding parts such as the bridge head guide slope 1, the supporting beam 2, the spanning beam 3 and the like are processed in a factory and transported to the site;

3. mounting support beams 2 on the bridge decks of the old bridge abutments and the piers;

4. hoisting the spanning beam 3 to erect the spanning beam on the supporting beam 2, and anchoring the spanning beam by using a bent bolt 5;

5. and laying a bridge head slope leading 1 at the bridge head to finish final construction.

According to the characteristic that the overweight vehicle bridge is always disposable, the temporary bridge is laid on the original old bridge, and the crossing load-shedding technology is applied to guarantee the safety of the overweight vehicle bridge, so that the temporary reinforcing method is effective and feasible. The supporting beam 2 of the temporary bridge is placed at the abutment of the old bridge, and the spanning beam 3 bears the live load of all vehicles and is not in contact with the main beam of the old bridge, so that the main beam of the old bridge is not affected by the live load effect of the vehicles and is prevented from being damaged.

For the bridge condition with larger span, the supporting beam 2 only depending on the abutment position still difficultly guarantees that the spanning beam 3 does not bend and deform, and further causes damage to the old bridge girder bearing the live load of the vehicle, therefore, the spanning beam 3 with larger span is also provided with the supporting beam 2 at each pier position, so that the live load of the vehicle can be transferred by depending on the pier, and the safe running of the vehicle is ensured.

Referring to fig. 2 and 4, a rubber pad 7 is arranged between the bottom surface of the supporting beam 2 and the old bridge deck, and the rubber pad 7 is a chloroprene rubber pad 7 with the thickness of 10mm. Through setting up rubber pad 7 not only can bear the load, can also change the stress that produces of friction, vibrations, expend with heat and contract with cold displacement, the life of extension bridge, and chloroprene rubber pad has higher tensile strength, concertina rate, and ageing-resistant, heat-resisting, corrosion-resistant, can fine use in outdoor environment.

The upper deck slab 3.1 is a diamond pattern steel plate with the thickness of 12mm, the edges of two sides of the upper deck slab 3.1 are fixedly provided with guard wheel guide angle steel 9, two adjacent I-shaped steel 3.3 are fixedly connected through a plurality of transverse partition plates 8 welded on the web plate, the I-shaped steel adopts a 32C model, the thickness of the transverse partition plates is 16mm, the thickness of the bottom contact steel plate is 20mm, and the lower deck slab and the I-shaped steel are fixedly connected after being polished and tightly propped.

The surface friction of the upper deck bridge deck can be increased through the diamond-shaped patterns, and the phenomena of vehicle running slip and the like are avoided; the wheel protecting guide angle steel 9 plays a role in protection, and safety accidents caused by the fact that wheels are separated from the side edge of the upper deck bridge deck 3.1 in the driving process are prevented; the adjacent I-shaped steel 3.3 is welded and fixed by adopting the diaphragm plate 8 to form a whole, and the thicker bottom connection steel plate is used as a bottom connection foundation, so that the structural stability of the whole spanning beam 3 is improved.

The upper deck bridge deck 3.1 is equipped with wheel guide sign along the bridge trend, and wheel guide sign is the spacing line that coats the pigment formation on upper deck bridge deck upper surface, and it is located the outside edge in 4 both sides of rib. Through setting up wheel guide sign, can make the accurate reinforcing part 4 position of transmitting to a supporting beam 2 of vehicle load, also played the effect of safe guide simultaneously.

Example 2

Referring to fig. 1-2 and 5, the present embodiment also provides a pass-through steel access bridge system, which is different from embodiment 1 in that: the reinforcing part 4 is replaced by the pre-buried steel bar mesh of the embodiment 1, wherein the length of the steel bar is not less than 800mm, and the width of the steel bar is not less than 75% of the total width of the support beam 2.

The reinforcing part 4 formed by embedding the steel plates in this embodiment is the same in function as the reinforcing mesh of embodiment 1, but it is more convenient in producing the support beam 2, and the process of arranging the reinforcing mesh is omitted. It should be noted that the steel plate has through holes (not shown) for the two ends of the bent bolt 5 to pass through, and the bent bolt 5 needs to be welded and fixed with the steel plate after passing through the through holes.

Example 3

Referring to fig. 1, the embodiment is based on the guarantor steel temporary bridge system of embodiment 1 or embodiment 2, and further includes a detection reminding system, and the detection reminding system is provided with a weight detection device 10, a speed measurement and photographing device 11, and a warning device 12.

The weight detection device 10 is installed on the road surface outside the bridge head approach slope 1, a certain distance is reserved between the weight detection device 10 and the outside end of the bridge head approach slope 1, a communication module is arranged inside the weight detection device 10, and the communication module communicates with an external control end through embedded optical fibers.

The speed measuring and photographing device 11 and the warning device 12 can be installed in a portal structure or a cantilever structure. The speed measuring and photographing device 11 is installed on the road surface between the bridge head leading slope 1 and the weight detecting device 10 through a support, and is used for measuring the passing speed of the overweight vehicle, photographing the overweight vehicle and uploading information to the control end. Warning device 12 passes through the support mounting and draws 1 outside end's of slope road surface one side at the bridgehead, warning device 12 is equipped with the warning sign, the warning light unit, and the voice broadcast unit, warning device 12's warning sign and warning light unit are used for reminding the driver to drive into just the bridge area, need cautiously walk slowly, drive as far as possible according to wheel guide sign, the voice broadcast unit then reminds the driver through voice mode carefully drive etc. the while is important to the heavy vehicle that tests the speed and shoot the hypervelocity of device feedback.

Due to the temporary access bridge system, the supporting beam 2 and the spanning beam 3 are fixed only by self gravity, if the speed of the overweight vehicle is too high, the parts of the temporary bridge system may be separated or displaced by shocks, which seriously affect the safety of the bridge, and thus the speed of the overweight vehicle passing through the bridge needs to be strictly controlled. This embodiment is through installing weight detection device 10 (for example, weighbridge) at the bridge head leading slope 1 outside road surface for detect the weight of the vehicle that needs to cross the bridge, if the vehicle weight does not exceed the predetermined value, normal driving can, if the vehicle weight exceeds the predetermined value, judge that this car is overweight, communication module and external control end communication this moment, and feedback this vehicle information to the voice broadcast unit of testing the speed and taking a picture device 11 and warning device 12, test the speed and take a picture device 11 (for example, the camera that tests the speed) obtains information such as the license plate of overweight vehicle, if the speed of a motor vehicle is in suitable range, continue normal driving can, if the speed of a motor vehicle exceeds the settlement scope, the warning light unit of warning device 12 begins the scintillation suggestion, the voice broadcast unit carries out the voice prompt driver and has driven into just the bridge area simultaneously, need to reduce the speed of a motor vehicle, cautiously walk slowly.

Example 4

Referring to fig. 7, the traffic-insurance steel access bridge system according to the embodiment 1 or 2 further includes a traffic sign reminding system, and the traffic sign reminding system is provided with a manual guard device 13, an alternative electronic display sign 14 and a traffic guide line sign 15. The manual guarding device 13 is a manual guarding barrier gate arranged at a position 50 meters away from the bridge head and the bridge tail, and allows vehicles to enter a traffic control area after manual inspection. The electronic display sign 14 is a single-pile type sign board arranged at a position 20 meters away from the bridge head and the bridge tail, the sign board comprises a speed limit sign with the speed limit of 5Km/h, a load limit sign with the load limit of 55t and an electronic display alternative passing sign board, meanwhile, a vehicle stop line is further arranged at a position 20 meters away from the bridge head and the bridge tail, and the vehicle is guided to pass through the bridge according to the electronic display sign 14. The traffic wire mark 15 is a traffic marking line which is drawn within 10 meters of the bridge area and two sides of the bridge, and prompts and guides vehicles to cross the bridge according to the drawn marking line, the marking line returns to normal after the vehicles cross the bridge, and the vehicles run normally.

The present invention is not limited to the above-described embodiments, and various modifications made without inventive changes from the above-described concepts will be within the scope of the present invention as defined by the appended claims.

Claims (10)

1. A traffic-protecting steel temporary bridge system is characterized by comprising a bridge head approach slope (1), a supporting beam (2) and a spanning beam (3), wherein the supporting beam (2) is installed on a bridge floor at an old bridge abutment, the supporting beam (2) is a concrete precast block, and two ends of the supporting beam are provided with convex limit stops (2.1); the supporting beam (2) is at least provided with two reinforcing parts (4) along the length direction, the center distance between every two adjacent reinforcing parts (4) is 1800mm, each reinforcing part (4) is formed by a steel plate pre-embedded in the supporting beam (2) or a criss-cross reinforcing mesh pre-embedded in the supporting beam (2) and fixedly connected with the supporting beam, the length of the steel plate of each reinforcing part (4) is not less than 800mm, the width of the steel plate of each reinforcing part is not less than 75% of the total width of the supporting beam (2), or the length of the reinforcing mesh is not less than 1080mm, the width of the reinforcing mesh is not less than 90% of the total width of the supporting beam (2), and a group of U-shaped bent bolts (5) arranged along the width direction of the supporting beam (2) are pre-embedded below the reinforcing parts (4) of the supporting beam (2); the two ends of the bent bolt (5) penetrate through the supporting beam (2), the bent bolt (5) is fixedly welded with the steel plate or the reinforcing mesh, and two bending parts of a group of bent bolts (5) positioned below the same reinforcing part (4) are fixedly welded through two tie bars (6) respectively; the bridge head guide slopes (1) are laid on road surfaces at two ends of the bridge head, pressing grooves (1.1) with the same appearance as the supporting beams (2) are formed in the lower ends of the inner ends of the bridge head guide slopes, and the outer ends of the supporting beams (2) are embedded in the pressing grooves (1.1); span structure (3) include upper deck decking (3.1), bottom contact steel sheet (3.2) and fixed connection upper deck decking (3.1) and a plurality of parallel I-steel (3.3) that equidistant arranging of bottom contact steel sheet (3.2), span structure (3) both ends erect on supporting beam (2) of two abutment departments to paste with the medial extremity of bridgehead approach slope (1) and connect, span structure (3) are through bent bolt (5) and nut and supporting beam (2) fixed connection, adjacent two I-steel (3.3) interval is not more than 165mm, and wherein two I-steel (3.3) align with two sets of corresponding centers of bent bolt (5).

2. A bridge system according to claim 1, wherein the cross beam (3) is also provided with a support beam (2) at each pier position.

3. A traffic-ensuring steel temporary bridge system according to claim 1, wherein a rubber pad (7) is padded between the bottom surface of the supporting beam (2) and the old bridge deck, and the rubber pad (7) is a neoprene pad with a thickness of 10mm.

4. The viaduct steel access bridge system according to claim 1, wherein the upper deck slab (3.1) is a diamond-pattern steel plate with a thickness of 12mm, the bottom connection steel plate (3.2) is 20mm, and two adjacent I-shaped steels (3.3) are fixedly connected through a diaphragm plate (8) welded on a web plate.

5. The temporary bridge system made of steel according to claim 1, wherein wheel-protecting guide angle steel (9) is fixedly arranged at the edges of two sides of the upper deck slab (3.1).

6. A traffic bridge system according to claim 1, characterised in that the upper deck plate (3.1) is provided with wheel guide markings along the bridge run, said wheel guide markings being formed by a pigment applied to the upper surface of the upper deck plate and being located at the edges of the two sides of the reinforcement (4).

7. The steel temporary bridge system according to claim 1, further comprising a detection reminding system, wherein the detection reminding system is provided with a weight detection device (10), the weight detection device (10) is installed on the road surface outside the bridgehead approach slope (1) and has a certain distance from the outer end of the bridgehead approach slope (1), a communication module is arranged inside the weight detection device (10), and the communication module communicates with an external control end through embedded optical fibers.

8. The traffic-protection steel temporary bridge system according to claim 7, wherein the detection reminding system is further provided with a speed measuring and photographing device (11), and the speed measuring and photographing device (11) is installed on the road surface between the bridge head approach slope (1) and the weight detection device (10) through a support and is used for measuring the passing speed of the overweight vehicle, photographing the overweight vehicle and uploading information to the control end.

9. The traffic-ensuring steel temporary bridge system according to claim 8, wherein the detection reminding system is further provided with a warning device (12), the warning device (12) is mounted on one side of the road surface close to the outer side end of the bridge head approach slope (1) through a support, the warning device (12) is provided with a warning board, a warning lamp unit and a voice broadcasting unit, and the warning device (12) is used for reminding a driver that the driver drives into the temporary bridge area and needs to carefully and slowly move.

10. A traffic-ensuring steel temporary bridge system according to claim 1, which further comprises a traffic sign reminding system provided with a manual duty device (13), an alternative electronic display sign (14) and a traffic wire sign (15).

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