Profile steel assembly type bailey bridge

Abstract

The utility model provides a section steel assembly type bailey bridge which solves the problems that in the prior art, due to the fact that the number of splicing joints of a bailey bridge is large, the construction efficiency is low, and the rigidity of a bridge body is low. The device comprises a plurality of pieces of H-shaped steel, symmetrical H-shaped grooves are formed in the two sides of the H-shaped steel, the H-shaped steel is vertically arranged in parallel at a fixed interval, and the H-shaped grooves of the adjacent H-shaped steel are oppositely arranged; the vertical Bailey structure comprises a plurality of Bailey pieces which are vertically arranged between the adjacent H-shaped steel, and the two ends of each Bailey piece are arranged in the two H-shaped grooves which are oppositely arranged in a clamped mode respectively; the transverse bailey structure comprises a plurality of bailey pieces which are transversely arranged between the two vertical bailey structures, and the transverse bailey structure is fixed to the lower side edge of the H-shaped groove; and a plurality of roadbed plates, wherein the roadbed plates are laid above the H-shaped steel.

Description

TECHNICAL FIELD

[0001] The utility model relates to construction keep open technical field especially relates to a section steel assembly type bailey bridge. BACKGROUND

[0002] Bailey bridge as a kind of assembly type steel bridge, in the field such as temporary bridge construction, military engineering and emergency rescue, plays an important role.The traditional bailey bridge has some problems in structural design and construction convenience.

[0003] The structure of traditional bailey bridge is usually more complex, and the connection and fixation between components need to consume a lot of manpower and time, especially when facing emergency situation and needing to quickly build bridge, this complex structure form can reduce construction efficiency.

[0004] Secondly, due to the multiple splicing nodes of traditional bailey bridge, the overall stiffness of bridge body is weak, it is difficult to meet the requirements of construction and keep open. UTILITY MODEL CONTENT

[0005] In view of the above-mentioned shortcomings of prior art, the technical problem to be solved by the utility model is to provide a section steel assembly type bailey bridge, to solve the problems of low construction efficiency and low bridge body stiffness caused by multiple splicing nodes in prior art bailey bridge.

[0006] In order to solve the above technical problems, the utility model provides a section steel assembly type bailey bridge, comprising:

[0007] A plurality of H-shaped steel, the two sides of H-shaped steel are provided with symmetrical H-shaped groove, H-shaped steel is vertically parallelly arranged at fixed interval, and the H-shaped grooves of adjacent H-shaped steel are oppositely arranged;

[0008] Vertical bailey structure, the vertical bailey structure includes a plurality of bailey pieces vertically arranged between adjacent H-shaped steel, and the two ends of bailey piece are respectively clamped in two oppositely arranged H-shaped grooves;

[0009] Horizontal bailey structure, the horizontal bailey structure includes a plurality of bailey pieces horizontally arranged between two vertical bailey structures, and the horizontal bailey structure is fixed with the lower side of H-shaped groove.

[0010] A plurality of roadbed plates, the roadbed plate is laid on the top of H-shaped steel.

[0011] As a more preferred mode, the four corners of bailey piece are provided with positioning holes for fixation.

[0012] As a more preferred mode, the H-shaped groove of the H-shaped steel is also vertically provided with a plurality of fixing plates, the fixing plates are provided with fixing holes matched with the driving positioning holes, the belay plate is locked with the H-shaped steel by the fasteners penetrating through the positioning holes and the fixing holes, and the vertical belay structure is formed; compared with the traditional belay bridge connected by the belay pin, the belay plate is fixed with the H-shaped steel by the fastener, the installation precision is higher, and the connection stiffness can be effectively improved. This means that under the action of load, the relative displacement between the belay plate and the H-shaped steel is small, so that the whole bridge structure is more stable and is not easy to shake or deform, which is beneficial to improve the bearing capacity and service life of the bridge.

[0013] As a more preferred mode, the belay plate comprises a chord, a vertical rod and a plurality of web rods, wherein the chord and the vertical rod form a frame structure of the belay plate, and the web rods are filled in the frame structure to strengthen the structure.

[0014] As a more preferred mode, the belay plate comprises two chords, two vertical rods, and the frame structure is a rectangular frame structure formed by the two chords and the vertical rods, and the rectangular frame structure of the belay plate is formed by the combination of the two chords and the vertical rods, so as to form a stable stress system. The chord mainly bears tension and pressure, and the vertical rod plays a supporting and connecting role, so that the whole structure can better disperse and bear the force when subjected to bending moment, thereby improving the bending resistance.

[0015] As a more preferred mode, the belay plate comprises two web rods, one end of the two web rods is fixed to the middle of a chord, and the other end is connected with the two ends of another chord respectively; wherein the web rod can effectively transmit the upper load to the chord, and then transmit the load to the whole structure system; in the steel assembly type belay bridge of the utility model, the web rod can uniformly disperse various external loads such as vehicle load, wind load and snow load to the chord, so as to avoid local load too large to cause structural deformation or damage, and the stress distribution in the belay plate structure is more uniform through the arrangement of the web rod; under the action of load, the web rod and the chord jointly bear tension and pressure, so that the stress state of the whole structure is more reasonable, and the bearing capacity and stability of the structure are improved.

[0016] As a more preferred mode, the chord and the vertical rod are both L-shaped rod members vertically spliced by two plates, the cross-sectional shape of the L-shaped rod member has better performance when bending; when the chord and the vertical rod are subjected to bending moment, the L-shaped cross section can provide greater resisting moment, thereby enhancing the bending resistance, which is of great significance to bear various external loads such as vehicle load, wind load, etc., and can effectively prevent the rod member from breaking or deforming when bending; secondly, the vertical splicing structure of the L-shaped rod member has better performance when bearing shear force. The L-shaped cross section formed by vertically splicing two plates can better bear shear force and prevent the rod member from being damaged when shearing. This is crucial to improve the stability of the entire Bailey bridge structure, especially under the condition of bearing large shear force.

[0017] As a more preferred mode, the steel assembly type Bailey bridge further comprises a guardrail structure to improve safety performance.

[0018] As a more preferred mode, the guardrail structure comprises two groups of guardrails, the guardrails are respectively arranged on the two outermost H-shaped steels, and the roadbed plate is arranged inside the guardrails.

[0019] As a more preferred mode, the guardrail comprises a plurality of upright columns and supporting plates, the upright columns are uniformly arranged on the H-shaped steel at a certain interval, and the supporting plates are fixed perpendicularly to the upright columns.

[0020] As described above, the utility model discloses a type steel assembled bailey bridge has following beneficial effect: the utility model discloses a type steel assembled bailey bridge when assembling, directly utilize H -type steel as the main load -bearing beam, H -type steel compares with the traditional bailey bridge to adopt distribution beam, it has better rigidity, and then provide better bearing capacity, the whole length span of H -type steel is bigger, and the bailey bridge of same length, and it needs the splicing node less, can promote the erection efficiency, secondly the utility model discloses a type steel assembled bailey bridge adopts vertical bailey structure and transverse bailey structure to connect with H -type steel, and then resist vertical load and lateral force, enhance the overall stability of bailey bridge, when bailey bridge is subjected to the force of vertical downward such as vehicle load, vertical bailey structure can reasonably transmit these forces to the main force component such as type steel, avoid partial component and deform or damage under excessive force, transverse bailey structure can evenly distribute the load such as wind load, transverse impact force generated by vehicle driving to the whole bailey bridge structure, avoid partial component and damage under excessive transverse force, thereby enhance the stability of bailey bridge in the lateral, finally, when bailey bridge bears vertical load, transverse bailey structure and vertical bailey structure cooperate with each other, bear and transmit load together, and the spatial bailey structure formed can make load more reasonably distribute in the plane and space of bailey bridge, improve the overall bearing capacity of bailey bridge, make bailey bridge can maintain good working performance under various complex load actions.

[0021] In conclusion, the type steel assembled bailey bridge of the utility model uses H -type steel as the main bearing component, utilizes its good rigidity and large span characteristics, and further improves the erection efficiency and bearing capacity by combining the spatial bailey structure formed by the vertical bailey sheet and the transverse bailey sheet, solving the problems of low construction efficiency and low bridge body rigidity caused by many splicing nodes in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is shown as the schematic diagram of the ordinary visual angle of the type steel assembled bailey bridge of the utility model.

[0023] Figure 2 It is shown as Figure 1 It is shown as the partial enlarged view of the middle area A.

[0024] Figure 3 It is shown as the schematic diagram of the side visual angle of the type steel assembled bailey bridge of the utility model.

[0025] Figure 4 It is shown as the structure schematic diagram of the bailey sheet 2 of the type steel assembled bailey bridge of the utility model.

[0026] Element number explanation

[0027] 1 H -type steel

[0028] 11 H-shaped slot

[0029] 12 fixing plate

[0030] 121 fixing hole

[0031] 2 bearing plate

[0032] 21 chord

[0033] 22 vertical rod

[0034] 23 abdominal rod

[0035] 24 positioning hole

[0036] 3 guardrail

[0037] 31 stand

[0038] 32 support plate

[0039] 4 subgrade plate DETAILED DESCRIPTION

[0040] The implementation of the present application will be described by specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification.

[0041] It should be understood that the structures, proportions, sizes, etc. shown in the drawings attached to the specification are only used to understand and read the content disclosed in the specification by those skilled in the art, and are not used to limit the implementation conditions of the present application, so they do not have technical substantive significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application. The following detailed description should not be considered as limiting, and the scope of the embodiments of the present application is only limited by the claims of the published patent. The terms used herein are only used to describe specific embodiments, and are not intended to limit the present application. Spatially related terms, such as "upper", "lower", "left", "right", "below", "under", "lower", "above", "upper", etc. can be used in the text to facilitate the description of the relationship between one element or feature shown in the figure and another element or feature.

[0042] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix", "hold" and so on should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connect, can be mechanical connection, also can be electrical connection, can be direct connection, also can indirectly connect through intermediate medium, can be two element internal communication. For ordinary skilled person in the art, can understand the concrete meaning of above-mentioned term in the utility model according to specific circumstances.

[0043] Furthermore, as used herein the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises", "comprising", "includes" and / or "including", when used herein, specify the presence of stated features, operations, elements, components, items, and / or objects, but do not preclude the presence or addition of one or more other features, operations, elements, components, items, and / or objects. As used herein, the terms "or" and "and / or" are to be interpreted as inclusive, i.e., as meaning one or any combination of the items. Thus, "A, B or C" or "A, B and / or C" means any of the following: A; B; C; A and B; A and C; B and C; A, B and C. An exception to this definition will occur only when two or more sequentially connected terms are in some way inherently mutually exclusive.

[0044] As Figures 1 to 4 shown, the utility model provides a kind of steel assembly type bailey bridge, comprising:

[0045] A plurality of H-shaped steel 1, the both sides of H-shaped steel 1 are provided with symmetrical H-shaped groove 11, H-shaped steel 1 is vertically parallel with fixed spacing, and the H-shaped groove 11 of adjacent H-shaped steel 1 is oppositely arranged;

[0046] Vertical bailey structure, the vertical bailey structure includes a plurality of bailey piece 2 vertically arranged between adjacent H-shaped steel 1, and the both ends of bailey piece 2 are respectively clamped in two oppositely arranged H-shaped grooves 11;

[0047] Horizontal bailey structure, the horizontal bailey structure includes a plurality of bailey piece 2 horizontally arranged between two vertical bailey structures, and the horizontal bailey structure is fixed with the lower side of H-shaped groove 11;

[0048] A plurality of roadbed plates 4, the roadbed plate 4 is laid on the top of H-shaped steel 1.

[0049] In order to better introduce the profile steel assembled bailey bridge, the following specific application is combined to illustrate that the profile steel assembled bailey bridge directly utilizes the H-shaped steel 1 as the main bearing beam in assembly, the H-shaped steel 1 has better rigidity compared with the distribution beam of the traditional bailey bridge, and further provides better bearing capacity; meanwhile, the whole length span of the H-shaped steel 1 is larger, the bailey bridge with the same length needs fewer splicing nodes, and the erection efficiency can be improved; secondly, the profile steel assembled bailey bridge utilizes the vertical bailey structure and the transverse bailey structure to be connected with the H-shaped steel 1, and further resists the vertical load and the lateral force, and enhances the overall stability of the bailey bridge; when the bailey bridge is subjected to the vertically downward force of the vehicle load, the vertical bailey structure can reasonably transmit the force to the main force components such as the profile steel, and deformation or damage of local components due to excessive force is avoided; the transverse bailey structure can evenly distribute the load, such as the wind load and the lateral impact force generated by the vehicle driving, to the whole bailey bridge structure, damage of local components due to excessive lateral force is avoided, and the stability of the bailey bridge in the transverse direction is enhanced; finally, when the bailey bridge bears the vertical load, the transverse bailey structure and the vertical bailey structure cooperate with each other to bear and transmit the load, the spatial bailey structure formed can make the load more reasonably distributed in the plane and the space of the bailey bridge, improve the overall bearing capacity of the bailey bridge, and enable the bailey bridge to maintain good working performance under various complex loads; it can be seen that the profile steel assembled bailey bridge utilizes the H-shaped steel 1 as the main bearing component, utilizes the characteristics of good rigidity and large span, and further improves the erection efficiency and the bearing capacity by combining the spatial bailey structure formed by the vertical bailey piece 2 and the transverse bailey piece 2, and solves the problems of low construction efficiency and low bridge body rigidity of the bailey bridge in the prior art due to many splicing nodes.

[0050] In some possible embodiments of the utility model, as shown in Figure 4 The four corners of the bailey piece 2 are provided with positioning holes 24 for fixing.

[0051] In some possible embodiments of the utility model, as shown in Figure 2As shown, the H-shaped groove 11 of the H-shaped steel 1 is also vertically provided with a plurality of fixed plates 12, the fixed plates 12 are provided with fixed holes 121 matched with the driving positioning holes 24, the bailey piece 2 and the H-shaped steel 1 are locked by the fasteners penetrating through the positioning holes 24 and the fixed holes 121, and the vertical bailey structure is formed; compared with the traditional bailey bridge connected by bailey pins, the bailey piece 2 is fixed with the H-shaped steel 1 by the fasteners, the installation precision is higher, and the connection rigidity can be effectively improved. This means that under the action of load, the relative displacement between the bailey piece 2 and the H-shaped steel 1 is small, so that the whole bridge structure is more stable and is not easy to shake or deform, which is beneficial to improve the bearing capacity and service life of the bridge.

[0052] In some possible embodiments of the utility model, as shown in Figure 4 As shown, the bailey piece 2 includes a chord 21, a vertical rod 22 and a plurality of web rods 23, wherein the chord 21 and the vertical rod 22 form a frame structure of the bailey piece 2, and the web rods 23 are filled in the frame structure to strengthen the structure.

[0053] In some possible embodiments of the utility model, as shown in Figure 4 As shown, the bailey piece 2 includes two chords 21 and two vertical rods 22, the frame structure is a rectangular frame structure formed by the two chords 21 and the vertical rods 22, and the bailey piece 2 of the rectangular frame structure is formed by the combination of the two chords 21 and the vertical rods 22, forming a stable stress system. The chord 21 mainly bears tension and pressure, and the vertical rod 22 plays a supporting and connecting role, so that the whole structure can better disperse and bear the force when subjected to bending moment, thereby improving the bending resistance.

[0054] In some possible embodiments of the utility model, as shown in Figure 4 As shown, the bailey piece 2 includes two web rods 23, one end of the two web rods 23 is fixed to the middle of a chord 21, and the other end is connected to the two ends of another chord 21 respectively; wherein the web rod 23 can effectively transmit the upper load to the chord 21, and then transmit it to the whole structure system by the chord 21; in the steel assembly type bailey bridge of the utility model, the web rod 23 can uniformly disperse various external loads such as vehicle load, wind load and snow load to the chord 21, avoid the structure deformation or damage caused by excessive local load, and the stress distribution in the bailey piece 2 structure is more uniform through the arrangement of the web rod 23; under the action of load, the web rod 23 and the chord 21 jointly bear tension and pressure, so that the stress state of the whole structure is more reasonable, and the bearing capacity and stability of the structure are improved.

[0055] In some possible embodiments of the utility model, as shown in Figure 4As shown, the chord 21 and the vertical rod 22 are both L-shaped rod members vertically spliced by two plates, and the L-shaped rod members have better performance when bending due to the cross-sectional shape; when the chord 21 and the vertical rod 22 are subjected to bending moment, the L-shaped cross section can provide greater resisting moment, thereby enhancing the bending resistance, which is of great significance for bearing various external loads such as vehicle load, wind load and the like, and can effectively prevent the rod member from being broken or deformed when bending; secondly, the vertically spliced structure of the L-shaped rod member also has better performance when bearing shear force. The L-shaped cross section formed by the vertical splicing of the two plates can better bear shear force and prevent the rod member from being damaged when shearing. This is crucial to improve the stability of the entire Bailey piece 2 structure, especially under the condition of bearing large shear force; further, in the embodiment, the L-shaped rod member is also provided with a slot, and the slot is used to facilitate the splicing and combination of the Bailey piece 2.

[0056] In some possible embodiments of the utility model, as shown in Figure 1 As shown, the profile steel assembled Bailey bridge further comprises a guardrail structure, and the safety performance is improved.

[0057] In some possible embodiments of the utility model, as shown in Figure 1 As shown, the guardrail structure comprises two groups of guardrails 3, the guardrails 3 are respectively arranged on the two outermost H-shaped steels 1, and the roadbed plates 4 are arranged on the inner side of the guardrails 3.

[0058] In some possible embodiments of the utility model, as shown in Figure 1 As shown, the guardrail 3 comprises a plurality of stand columns 31 and supporting plates 32, the stand columns 31 are uniformly arranged on the H-shaped steel 1 at a certain interval, and the supporting plates 32 are fixed perpendicularly to the stand columns 31; further, in the embodiment, the supporting plates 32 comprise two parallel plates, and the protection area and safety are improved.

[0059] In some possible embodiments of the utility model, as shown in Figure 1 And Figure 3 As shown, the profile steel assembled Bailey bridge comprises five H-shaped steels 1, four groups of vertical Bailey structures are arranged between the H-shaped steels 1 two by two, and the Bailey pieces 2 arranged transversely are filled between the two Bailey pieces 2 of the vertical Bailey structure, and the plurality of transversely arranged Bailey pieces 2 form the transverse Bailey structure; further, the H-shaped steel 1 is provided with a roadbed plate 4, the width of the roadbed plate 4 is consistent with the interval between the adjacent H-shaped steels 1, four roadbed plates 4 are arranged on two H-shaped steels 1, and in the embodiment, sixteen roadbed plates 4 are arranged as bridge decks.

[0060] As described above, the profile steel assembled Bailey bridge has the following beneficial effects:

[0061] 1. High efficiency bearing and splicing:

[0062] H-shaped steel 1 as a bearing beam: H-shaped steel 1 has better stiffness and larger overall span, which can provide better bearing capacity compared with the distribution beam used in traditional Bailey bridge, while reducing the splicing nodes and improving the erection efficiency.

[0063] Vertical and horizontal Bailey structure: The combination of vertical and horizontal Bailey structures enhances the overall stability of the Bailey bridge, which can effectively resist vertical load and lateral force.

[0064] 2. Load transfer and dispersion:

[0065] Vertical load transfer: The vertical Bailey structure reasonably transfers the vertical downward force such as vehicle load to the main force components such as steel, avoiding local component deformation or damage due to excessive force.

[0066] Lateral load dispersion: The horizontal Bailey structure evenly distributes the lateral impact force such as wind load and vehicle driving to the entire Bailey bridge structure, enhancing the lateral stability of the bridge body.

[0067] 3. Structure optimization:

[0068] Spatial Bailey structure: The spatial Bailey structure formed by the cooperation of vertical and horizontal Bailey structures makes the load more reasonably distributed in the plane and space of the Bailey bridge, improving the overall bearing capacity.

[0069] Bailey piece 2 design: Bailey piece 2 includes chord 21, vertical rod 22 and web 23, where chord 21 and vertical rod 22 form a stable rectangular frame structure, web 23 strengthens the structure and evenly distributes the load, improving bending resistance and bearing capacity.

[0070] 4. Installation precision and connection stiffness:

[0071] Positioning hole 24 and fixed plate 12: The four corners of Bailey piece 2 are provided with positioning hole 24, and fixed plate 12 is provided in H-shaped groove 11, which locks Bailey piece 2 with H-shaped steel 1 through fasteners. Compared with the traditional Bailey bridge connected by Bailey pins, the installation precision is higher, the connection stiffness is stronger, and the bearing capacity and service life of the bridge are improved.

[0072] 5. Bending and shear resistance:

[0073] L-shaped bar: Chord 21 and vertical rod 22 adopt L-shaped bar, which has better bending and shear resistance, can effectively prevent the bar from breaking or deforming when bending or shearing, and improve the stability of Bailey piece 2 structure.

[0074] 6. Improved safety performance:

[0075] Guardrail structure: The guardrail structure is arranged, including the column 31 and the support plate 32, the safety performance of the Bailey bridge is improved, and the personnel or vehicle accidental falling is prevented.

[0076] 7. Construction efficiency and cost saving:

[0077] Reduce the number of splicing nodes: due to the larger overall span of the H-shaped steel 1, the number of splicing nodes is reduced, the erection efficiency is improved, and the construction cost is reduced.

[0078] Modular design: the standardized design and modular assembly of the Bailey piece 2 further improve the construction efficiency, facilitate transportation and installation.

[0079] The steel assembly Bailey bridge of the patent realizes multiple advantages of efficient bearing, structure optimization and convenient construction through innovative structure design. Its core advantage is to use H-shaped steel 1 as the main bearing beam, combined with vertical and horizontal Bailey structure, to form a space Bailey structure, which significantly improves the overall stability and bearing capacity of the Bailey bridge. At the same time, by optimizing the design of the Bailey piece 2, such as the positioning hole 24, the fixed plate 12, the L-shaped rod, etc., the installation precision and connection stiffness are improved, the bending and shear resistance of the bridge is enhanced. In addition, the setting of the guardrail structure further improves the safety performance. Overall, the steel assembly Bailey bridge of the patent solves the problems of many splicing nodes, low construction efficiency and low bridge body stiffness in the prior art, and provides an efficient, stable, safe and cost-saving solution. Therefore, the utility model effectively overcomes the shortcomings of the prior art and has high industrial utilization value.

[0080] The above embodiments only exemplarily illustrate the principles and effects of the utility model, and are not used to limit the utility model. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the utility model. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the utility model should be covered by the claims of the utility model.

Claims

1. A steel assembly type Bailey bridge, characterized in that, The utility model relates to a type steel assembled bailey bridge, which comprises the following parts: a plurality of H-shaped steels (1) are vertically and parallelly arranged at a fixed interval, and the H-shaped grooves (11) of the adjacent H-shaped steels (1) are oppositely arranged; a vertical bailey structure is formed by a plurality of bailey pieces (2) vertically arranged between the adjacent H-shaped steels (1), and the two ends of the bailey pieces (2) are respectively clamped in the two oppositely arranged H-shaped grooves (11); a horizontal bailey structure is formed by a plurality of bailey pieces (2) horizontally arranged between the two vertical bailey structures, and the horizontal bailey structure is fixed to the lower side of the H-shaped groove (11); a plurality of roadbed plates (4) are arranged above the H-shaped steels (1).

2. The steel assembled Bailey bridge according to claim 1, characterized in that: The bailey piece (2) is provided with positioning holes (24) at four corners for fixation.

3. The steel assembly type Bailey bridge according to claim 2, characterized in that: A plurality of fixing plates (12) are vertically arranged in the H-shaped groove (11) of the H-shaped steel (1), and a fixing hole (121) matched with the positioning hole (24) is formed in the fixing plate (12); the bailey piece (2) and the H-shaped steel (1) are locked by a fastener penetrating through the positioning hole (24) and the fixing hole (121), thereby forming the vertical bailey structure.

4. The steel assembled Bailey bridge according to claim 1, characterized in that: The bailey piece (2) comprises a chord (21), a vertical rod (22) and a plurality of web rods (23), wherein the chord (21) and the vertical rod (22) form a frame structure of the bailey piece (2), and the web rods (23) are filled in the frame structure to strengthen the structure.

5. The steel assembly type Bailey bridge according to claim 4, characterized in that: The bailey piece (2) comprises two chords (21) and two vertical rods (22), and the frame structure is a rectangular frame structure formed by the two chords (21) and the vertical rod (22).

6. The steel assembly type Bailey bridge according to claim 5, characterized in that: The bailey piece (2) comprises two web rods (23), one end of each of the two web rods (23) is fixed to the middle part of a chord (21), and the other end of each of the two web rods (23) is connected to the two ends of another chord (21).

7. The steel assembly type Bailey bridge according to claim 6, characterized in that: The chord (21) and the vertical rod (22) are both L-shaped rod members vertically combined by two plates.

8. The steel assembled Bailey bridge according to claim 1, characterized in that: The type steel assembled bailey bridge further comprises a guardrail structure.

9. The steel assembly type Bailey bridge according to claim 8, characterized in that: The guardrail structure comprises two groups of guardrails (3), the guardrails (3) are arranged on the two outermost H-shaped steels (1), and the roadbed plates (4) are arranged inside the guardrails (3).

10. The steel assembly type Bailey bridge according to claim 9, characterized in that: The guardrail (3) comprises a plurality of stand columns (31) and supporting plates (32), the stand columns (31) are uniformly arranged on the H-shaped steel (1) at a certain interval, and the supporting plates (32) are vertically fixed to the stand columns (31).

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