Assembly method of lane steel bridge

Abstract

According to the assembly method of the lane steel bridge provided by the invention, environment and load tests are performed on the lane through the setting step S6, and the preset installation parameters of the sidewalk are determined according to the test result, so that the possible influence on the assembly process of the sidewalk under the action of environmental factors and in the assembly process of the lane is fully considered; and determining the preset installation parameters of the sidewalk according to the influence, and effectively predicting the preset installation parameters of the sidewalk based on the influence, thereby effectively improving the assembly efficiency and assembly quality of the sidewalk, further effectively improving the use quality and safety of the lane steel bridge, and prolonging the service life of the lane steel bridge.

Description

Technical Field

[0001] The invention relates to the technical field of steel bridges for driveways, and in particular to an assembling method for steel bridges for driveways. Background Art

[0002] Modular steel bridges, also known as Bailey bridges, are made of high-strength steel to form lightweight standardized truss unit components and beams, longitudinal beams, bridge decks, bridge seats and connectors. They can be quickly assembled into truss beam bridges suitable for various spans and loads through installation equipment. Therefore, they are widely used in various span bridge occasions and environments.

[0003] The existing steel bridge structure for lanes often includes a central carriageway and a single or double-sided sidewalk. The carriageway is for vehicles to pass, while the sidewalk is for pedestrians to pass. During the assembly process of the steel bridge structure for lanes in the prior art, the corresponding appropriate parameters of the carriageway and sidewalk are often formulated according to the parameters of the bridge piers on both sides and the environmental parameters of the bridge. This has the following defects and deficiencies in actual application: 1) Since the sidewalk is set on one or both sides of the roadway, only the impact of environmental factors and load conditions on the sidewalk and the roadway is often considered, while the deformation effect of the roadway on the sidewalk under environmental factors and load conditions is not considered; 2) During the assembly process, the roadway is usually assembled first and then the sidewalk. Therefore, the assembly process of the roadway will inevitably affect the assembly environment of the sidewalk. 3) The inspection process of the lane steel bridge is often carried out after the lane steel bridge is assembled as a whole. There is a lack of in-process inspection. Therefore, once an error occurs in the previous steps, it will cause waste and uselessness of subsequent operation steps, reducing assembly efficiency.

[0004] Therefore, there is an urgent need to provide an assembly method for a lane steel bridge to solve the defects and shortcomings in the above-mentioned prior art. Summary of the invention

[0005] In order to solve the defects and shortcomings in the prior art, the present invention provides an assembling method of a lane steel bridge.

[0006] The specific scheme provided by the present invention is: A method for assembling a steel bridge for a lane, characterized in that it comprises the following steps: S1: Determine the initial parameters of the steel frame bridge based on the parameters of the bridge piers on both sides; S2: Install the end seat plate and the stoppers on both sides on the top of the pier; S3: Install the inner truss members between the piers on both sides; S4: laying a roadway bottom beam at the bottom of the inner truss member, and making the end of the roadway bottom beam extend out of the inner truss member; S5: Laying the roadway slab on top of the roadway sill; S6: Conduct environmental and load tests on the roadway, and determine preset installation parameters of the sidewalk based on the test results; S7: Install the outer truss member at the extended end of the roadway bottom beam; S8: The sidewalk bottom beam is fixedly installed at the extended end of the carriageway bottom beam; S9: Lay the sidewalk deck on top of the sidewalk sill; S10: Conduct environmental and load tests on the sidewalk, and determine recommended installation parameters for the sidewalk based on the test results; S11: Install curbs on both sides of the roadway panels and sidewalk panels; S12: Install guardrail on the side of the sidewalk sill away from the outer truss members.

[0007] As a further preferred embodiment of the present invention, in step S1, the pier parameters at least include pier size parameters and pier environment parameters; the steel frame bridge initial parameters at least include roadway initial parameters and sidewalk initial parameters.

[0008] As a further preferred embodiment of the present invention, the step S3 includes the following steps: S3.1: Install truss columns on top of the end base plates; S3.2: Install the end inboard truss members on top of the end seat plates; S3.3: Install truss connectors on top of the inboard truss members; S3.4: The truss columns are fixedly connected to the truss connectors of the inner truss members at the ends through the column connectors; S3.5: Install the inner inner truss member on the inner side of the end inner truss member until the inner inner truss members on both sides abut against each other, and then fix the inner inner truss member located in the middle position; S3.6: Install the inverted inboard truss members on top of the truss connectors; S3.7: Install truss connectors on top of the inverted inside truss members; S3.8: Securely install truss fasteners at both ends of the inside truss members.

[0009] As a further preferred embodiment of the present invention, the step S4 includes the following steps: S4.1: Lay the end roadway sill beam at the bottom of the inner truss member so that the end of the end roadway sill beam extends beyond the inner truss member; S4.2: Lay the inner roadway sill beam at the bottom of the inner truss member so that the end of the inner roadway sill beam extends beyond the inner truss member; S4.3: Install truss stiffeners between adjacent roadway bottom beams; S4.4: Check and verify that the extended end of the end roadway sill is flush with the extended end of the inner roadway sill.

[0010] As a further preferred embodiment of the present invention, the step S5 includes the following steps: S5.1: Securely install the roadway panel on top of the roadway sill; S5.2: Check and confirm that the top of the adjacent roadway panels are flush with the preset requirements after installation; S5.3: Check and confirm that the spacing between adjacent roadway panels after installation meets the preset requirements; S5.4: Check and verify that the spacing between the sides of the installed roadway panels and the inner truss members meets the preset requirements.

[0011] As a further preferred embodiment of the present invention, step S6 includes the following steps: S6.1: Conduct a no-wind, no-load test on the roadway and determine the lower limit of the deformation of the protruding end of the roadway bottom beam based on the test results; S6.2: Conduct a full-load test on the roadway in a windy environment and determine the upper limit of the deformation of the protruding end of the roadway bottom beam based on the test results; S6.3: Determine the preset installation parameters of the sidewalk based on the upper and lower limits of the degree of deformation of the protruding end of the roadway bottom beam.

[0012] As a further preferred embodiment of the present invention, step S7 includes the following steps: S7.1: Securely install the end outer truss members at the extended end of the roadway bottom beam; S7.2: Install truss connectors on top of the end outboard truss members; S7.3: The inner end truss member is fixedly connected to the outer end truss member through the middle connecting member; S7.4: Install inverted end outboard truss members on top of truss connectors; S7.5: Install truss connectors on top of the inverted end outboard truss members; S7.6: The inverted end inner truss member is fixedly connected to the inverted end outer truss member by a middle connector; S7.7: Install the inner outer truss member on the inner side of the end outer truss member, repeat steps S7.2 to S7.6 until the inner and outer truss members on both sides abut against each other, and then fix the inner and outer truss member located in the middle position.

[0013] As a further preferred embodiment of the present invention, the step S8 includes the following steps: S8.1: Securely install the end sidewalk sill beam at the extended end of the end roadway sill beam; S8.2: An internal sidewalk sill shall be fixedly installed at the extended end of the internal roadway sill; S8.3: Verify that the projecting end of the end sidewalk sill is flush with the projecting end of the interior sidewalk sill.

[0014] As a further preferred embodiment of the present invention, the step S9 includes the following steps: S9.1: Securely install the sidewalk decking on top of the sidewalk sill; S9.2: Inspect and verify that the tops of adjacent sidewalk panels are flush with each other after installation; S9.3: Inspect and verify that the spacing between adjacent sidewalk panels after installation meets the specified requirements.

[0015] S9.4: Inspect and verify that the spacing between the inside and outside truss members of the sidewalk deck meets the preset requirements after installation.

[0016] As a further preferred embodiment of the present invention, the step S10 includes the following steps: S10.1: Conduct a no-load test on the sidewalk in a windless environment and determine the lower limit of the deformation degree of the sidewalk based on the test results; S10.2: Conduct a full-load test on the sidewalk in a windy environment and determine the upper limit of the sidewalk deformation based on the test results; S10.3: Determine the recommended installation parameters of the sidewalk based on the upper and lower limits of the sidewalk deformation degree; S10.4: Correct the initial parameters of the steel frame bridge in step S1 according to the difference between the preset installation parameters of the sidewalk and the recommended installation parameters of the sidewalk.

[0017] Compared with the prior art, the present invention can achieve the following technical effects: 1) The present invention provides an assembly method for a lane steel bridge, which performs environmental and load tests on the lane by setting step S6, and determines preset installation parameters of the sidewalk according to the test results, thereby fully considering the impact of environmental factors and loads and the impact of the lane assembly process on the sidewalk assembly process, and then determines the preset installation parameters of the sidewalk according to the impact, and then effectively predicts the preset installation parameters of the sidewalk based on the impact, thereby effectively improving the assembly efficiency and assembly quality of the sidewalk, and then effectively improving the use quality and safety of the lane steel bridge and extending its service life.

[0018] 2) The present invention provides an assembly method for a steel bridge for a lane, by setting step S10 to perform environmental and load tests on the sidewalk, and determining recommended installation parameters for the sidewalk according to the test results, so that after the sidewalk is assembled, by performing environmental and load tests on the sidewalk, on the basis of ensuring the safety and quality of the sidewalk, the previously determined preset installation parameters of the sidewalk can be effectively tested to determine the recommended installation parameters of the sidewalk; in addition, according to the difference between the preset parameters and the recommended parameters, the initial parameters of the steel frame bridge initially determined can be effectively corrected to provide data support for the subsequent assembly of the same steel bridge, thereby effectively improving the assembly efficiency and assembly accuracy, and ensuring the quality and safety of the same steel bridge.

[0019] 3) The present invention provides an assembly method for a driveway steel bridge, which further improves the assembly accuracy and quality of each step by performing corresponding inspection steps after the driveway assembly process and the sidewalk assembly process, thereby avoiding waste and uselessness of subsequent operation steps, improving the assembly efficiency, and improving the assembly quality of the steel bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A flowchart of the steps of the assembly method provided by the present invention.

[0021] Figure 2 A structural front view of the lane steel bridge provided by the present invention.

[0022] Figure 3 for Figure 2 An enlarged view of the structure at the middle pier location.

[0023] Figure 4 A structural side view of the lane steel bridge provided by the present invention.

[0024] Figure 5 A structural top view of the lane steel bridge provided by the present invention. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the 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 limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] [First embodiment] like Figure 1-5 The present invention provides a method for assembling a steel bridge for a lane according to a first embodiment, comprising the following steps: S1: Determine the initial parameters of the steel frame bridge according to the parameters of the piers on both sides; in this embodiment, the pier parameters at least include the pier size parameters and the environmental parameters of the piers; the pier size parameters may include the horizontal distance and vertical height difference between the piers on both sides, the flatness of the pier tops, the length and width of the piers on both sides, etc., and the environmental parameters of the piers may include temperature, humidity and wind speed, etc. Since the influence of other environmental parameters is relatively small, the environmental parameters in this embodiment only include wind speed, that is, the wind speed acting vertically on the length direction of the bridge body; and the initial parameters of the steel frame bridge at least include the initial parameters of the carriageway and the initial parameters of the sidewalk, which may include the length, width, height and proportion of the carriageway and the sidewalk; S2: Install the end seat plate 2 and the stoppers 3 on both sides on the top of the pier 1. The end seat plate 2 increases the installation space for the inner truss member and the outer truss member of the end to provide a stable fixed installation base, and the stoppers 3 on both sides can provide limit stops for the bridge body; S3: installing inner truss members between the bridge piers on both sides respectively; comprising the following steps: S3.1: Install the truss column 41 on the top of the end base plate 2 to provide fixed support and verticality reference for the subsequent end inner truss member and the end outer truss member; S3.2: Install the end inner truss member 421 on the top of the end seat plate 2 to provide connection and fixing support for the subsequent inner inner truss member 422; S3.3: A truss connector 44 is installed on the top of the inner truss member, and the inner truss member and the top inverted inner truss member are fixedly connected, and the end inner truss member 421 and the truss column 41 are fixedly connected. S3.4: The truss column 41 is fixedly connected to the truss connector 44 of the inner truss member 421 at the end through the column connector 45; S3.5: Install the inner inner truss member 422 on the inner side of the end inner truss member until the inner inner truss members 422 on both sides abut against each other, and then fix the inner inner truss member located in the middle position to achieve the overall fixed connection of the inner truss members on both sides of the bridge body; S3.6: Install the inverted inner truss member on top of the truss connector 44, such as Figure 2-3 As shown, by adopting an inverted triangular truss structure, the support strength on both sides of the bridge body is enhanced while its support stability is effectively improved; S3.7: Install a truss connector 44 on the top of the inverted inner truss member. The truss connector 44 is located so as to facilitate the subsequent connection of the inverted inner truss member with the inverted outer truss member. It can also serve as a connection basis for adding inner truss members on the top based on actual support requirements. S3.8: The truss fixing members 46 are fixedly installed at both ends of the inner truss member. The truss fixing members 46 are provided to facilitate the subsequent fixing and installation of the roadway bottom beam 5 between the inner truss members on both sides; S4: Lay the roadway bottom beam 5 at the bottom of the inner truss member, such as Figure 3-4 As shown, the end of the roadway bottom beam is extended out of the inner truss member; this is convenient for the subsequent extension of the end to fix the sidewalk bottom beam, and also convenient for observing the deformation effect of environmental factors and load conditions on the sidewalk; The following steps are involved: S4.1: Lay the end roadway bottom beam 51 at the bottom of the inner truss member, and make the end of the end roadway bottom beam extend out of the inner truss member to provide end support for the subsequent roadway panel; S4.2: Lay the inner roadway bottom beam 52 at the bottom of the inner truss member, and make the end of the inner roadway bottom beam extend out of the inner truss member to provide internal support for the subsequent roadway panel; S4.3: Install truss reinforcements between adjacent roadway bottom beams to ensure the support strength and stable spacing between adjacent roadway bottom beams and ensure stable support for the top roadway panel; S4.4: Check and confirm that the extended end of the end roadway sill is flush with the extended end of the inner roadway sill to provide a stable environment for the subsequent assembly process of the sidewalk sill and panel; S5: Laying a roadway panel on the top of the roadway bottom beam; comprising the following steps: S5.1: Fix the roadway panel 6 on the top of the roadway bottom beam, such as Figure 5 As shown; S5.2: Check and confirm that the top flushness of the adjacent roadway panels after installation meets the preset requirements to ensure the safety and stability of driving on them; S5.3: Check and confirm that the spacing between adjacent roadway panels after installation meets the preset requirements to ensure that there is no large gap between adjacent roadway panels, thereby ensuring the stability of driving on them and improving the service life of the roadway panels; S5.4: Check and confirm that the spacing between the two sides of the roadway panel and the inner truss members after installation meets the preset requirements to further ensure the safety and stability of driving on it; S6: Performing environmental and load tests on the carriageway, and determining preset installation parameters of the sidewalk according to the test results; by performing environmental and load tests on the carriageway, and determining preset installation parameters of the sidewalk according to the test results, the influence of environmental factors and loads on the assembly process of the sidewalk as well as during the assembly process of the carriageway is fully considered, and then the preset installation parameters of the sidewalk are determined according to the influence, and then the preset installation parameters of the sidewalk are effectively predicted based on the influence, so as to effectively improve the assembly efficiency and assembly quality of the sidewalk, and then effectively improve the use quality and safety of the steel bridge of the lane, and extend its service life; specifically comprising the following steps: S6.1: Conduct a no-wind, no-load test on the roadway and determine the lower limit of the deformation of the protruding end of the roadway bottom beam based on the test results; S6.2: Conduct a full-load test on the roadway in a windy environment and determine the upper limit of the deformation of the protruding end of the roadway bottom beam based on the test results; S6.3: Determine the preset installation parameters of the sidewalk according to the upper and lower limits of the deformation degree of the protruding end of the roadway bottom beam. In this case, the preset installation parameters of the sidewalk should be between the lower limit of the deformation degree of the protruding end of the roadway bottom beam and the upper limit of the deformation degree of the protruding end of the roadway bottom beam, and should be as close as possible to the lower limit of the deformation degree of the protruding end of the roadway bottom beam; S7: Installing the outer truss member 43 at the extended end of the roadway bottom beam 5 includes the following steps: S7.1: Fix and install the end outer truss member 43 at the protruding end of the roadway bottom beam 5; S7.2: Install a truss connector 44 on the top of the end outer truss member, through which the outer truss member and the top inverted outer truss member can be fixedly connected, and the end outer truss member and the truss column 41 can be fixedly connected; S7.3: The inner truss member at the end is fixedly connected to the outer truss member at the end through the middle connecting member 47, thereby achieving a fixed connection between the outer truss member and the inner truss member; S7.4: Install inverted end outer truss members on the top of the truss connectors. By adopting an inverted triangular truss structure, the support strength on both sides of the bridge body is enhanced while effectively improving its support stability; S7.5: Install a truss connector on the top of the inverted end outer truss member. The truss connector 44 at this position is convenient for connecting the inverted inner truss member with the inverted outer truss member. At the same time, based on the actual support requirements, it can also serve as a connection basis for adding outer truss members on the top; S7.6: The inverted end inner truss member is fixedly connected to the inverted end outer truss member through the middle connecting member 47; S7.7: Install the inner outer truss member on the inner side of the end outer truss member, repeat steps S7.2 to S7.6 until the inner outer truss members on both sides abut against each other, and then fix the inner outer truss member located in the middle position to achieve the overall fixed connection of the outer truss members on both sides of the bridge body; S8: fixing and installing the sidewalk bottom beam at the protruding end of the roadway bottom beam; comprising the following steps: S8.1: Install the end sidewalk sills fixedly at the extended end of the end roadway sills to provide end support for the subsequent installation of the sidewalk deck; S8.2: An internal sidewalk sill shall be fixedly installed at the extended end of the internal roadway sill to provide internal support for the subsequent installation of the sidewalk deck; S8.3: Verify that the extended ends of the end sidewalk sills are flush with the extended ends of the interior sidewalk sills to provide a stable environment for the subsequent assembly process of the sidewalk panels.

[0029] S9: Laying a sidewalk deck on top of the sidewalk sill; comprising the following steps: S9.1: Securely install the sidewalk deck 8 on the top of the sidewalk sill, such as Figure 5 As shown; S9.2: Check and confirm that the tops of adjacent sidewalk panels after installation are flush with the preset requirements to ensure the safety and stability of pedestrians passing thereon; S9.3: Check and confirm that the spacing between adjacent sidewalk panels after installation meets the preset requirements to ensure that there are no large gaps between adjacent sidewalk panels to facilitate stable passage of pedestrians on them; S9.4: Check and confirm that the spacing between the inner and outer truss members of the sidewalk panel after installation meets the preset requirements to further ensure that pedestrians can pass safely and stably on it; S10: Performing environmental and load tests on the sidewalk, and determining the recommended installation parameters of the sidewalk according to the test results; by performing environmental and load tests on the sidewalk, and determining the recommended installation parameters of the sidewalk according to the test results, after the sidewalk is assembled, the environmental and load tests on the sidewalk can effectively detect the previously determined preset installation parameters of the sidewalk on the basis of ensuring the safety and quality of the sidewalk, so as to determine the recommended installation parameters of the sidewalk; in addition, according to the difference between the preset parameters and the recommended parameters, the initial parameters of the initially determined steel frame bridge can be effectively corrected to provide data support for the subsequent assembly of the same type of steel bridge, thereby effectively improving the assembly efficiency and assembly accuracy, and ensuring the use quality and safety of the same type of steel bridge; The specific steps include: S10.1: Conduct a no-load test on the sidewalk in a windless environment and determine the lower limit of the deformation degree of the sidewalk based on the test results; S10.2: Conduct a full-load test on the sidewalk in a windy environment and determine the upper limit of the sidewalk deformation based on the test results; S10.3: Determine the recommended installation parameters of the sidewalk according to the upper and lower limits of the deformation degree of the sidewalk; in this case, the recommended installation parameters of the sidewalk should be between the lower limit of the deformation degree of the corresponding sidewalk and the upper limit of the deformation degree of the sidewalk, and should be as close to the lower limit of the deformation degree of the sidewalk as possible; S10.4: The initial parameters of the steel frame bridge in step S1 are corrected according to the difference between the preset installation parameters of the sidewalk and the recommended installation parameters of the sidewalk. According to the difference between the preset parameters and the recommended parameters, the initial parameters of the steel frame bridge initially determined are effectively corrected to provide data support for the subsequent assembly of the same type of steel bridge, thereby effectively improving the assembly efficiency and assembly accuracy, and ensuring the use quality and safety of the same type of steel bridge; S11: installing curbs 9 on both sides of the roadway panel and the sidewalk panel to further improve the safety of vehicles and pedestrians when passing by; S12: Install a guardrail 10 on the side of the sidewalk bottom beam away from the outer truss member, such as Figure 4 As shown, this can further improve the safety of pedestrians passing through.

[0030] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A method for assembling a steel bridge for a lane, characterized in that: The following steps are involved: S1: Determine the initial parameters of the steel frame bridge based on the parameters of the bridge piers on both sides; S2: Install the end seat plate and the stoppers on both sides on the top of the pier; S3: Install the inner truss members between the piers on both sides; S4: Laying a roadway bottom beam at the bottom of the inner truss member, and making the end of the roadway bottom beam extend out of the inner truss member; S5: Laying the roadway slab on top of the roadway sill; S6: Conduct environmental and load tests on the roadway, and determine preset installation parameters of the sidewalk based on the test results; S7: Install the outer truss member at the extended end of the roadway bottom beam; S8: The sidewalk bottom beam is fixedly installed at the extended end of the carriageway bottom beam; S9: Lay the sidewalk deck on top of the sidewalk sill; S10: Conduct environmental and load tests on the sidewalk, and determine recommended installation parameters for the sidewalk based on the test results; S11: Install curbs on both sides of the roadway panels and sidewalk panels; S12: Install guardrail on the side of the sidewalk sill away from the outer truss members.

2. The method for assembling a steel bridge for a lane according to claim 1, characterized in that: In the step S1, the pier parameters at least include pier size parameters and pier environment parameters; the steel frame bridge initial parameters at least include roadway initial parameters and sidewalk initial parameters.

3. The method for assembling a steel bridge for a lane according to claim 1, characterized in that: The step S3 includes the following steps: S3.1: Install truss columns on top of the end base plates; S3.2: Install the end inboard truss members on top of the end seat plates; S3.3: Install truss connectors on top of the inboard truss members; S3.4: The truss columns are fixedly connected to the truss connectors of the inner truss members at the ends through the column connectors; S3.5: Install the inner inner truss member on the inner side of the end inner truss member until the inner inner truss members on both sides abut against each other, and then fix the inner inner truss member located in the middle position; S3.6: Install the inverted inboard truss members on top of the truss connectors; S3.7: Install truss connectors on top of the inverted inside truss members; S3.8: Securely install truss fasteners at both ends of the inside truss members.

4. The method for assembling a steel bridge for a lane according to claim 1, characterized in that: The step S4 includes the following steps: S4.1: Lay the end roadway sill beam at the bottom of the inner truss member so that the end of the end roadway sill beam extends beyond the inner truss member; S4.2: Lay the inner roadway sill beam at the bottom of the inner truss member so that the end of the inner roadway sill beam extends beyond the inner truss member; S4.3: Install truss stiffeners between adjacent roadway bottom beams; S4.4: Check and verify that the extended end of the end roadway sill is flush with the extended end of the inner roadway sill.

5. The method for assembling a steel bridge for a lane according to claim 1, characterized in that: In the step S5, The following steps are involved: S5.1: Securely install the roadway panel on top of the roadway sill; S5.2: Check and confirm that the top of the adjacent roadway panels are flush with the preset requirements after installation; S5.3: Check and confirm that the spacing between adjacent roadway panels after installation meets the preset requirements; S5.4: Check and verify that the spacing between the sides of the installed roadway panels and the inner truss members meets the preset requirements.

6. The method for assembling a steel bridge for a lane according to claim 1, characterized in that: The step S6 includes the following steps: S6.1: Conduct a no-wind, no-load test on the roadway and determine the lower limit of the deformation of the protruding end of the roadway bottom beam based on the test results; S6.2: Conduct a full-load test on the roadway in a windy environment and determine the upper limit of the deformation of the protruding end of the roadway bottom beam based on the test results; S6.3: Determine the preset installation parameters of the sidewalk based on the upper and lower limits of the degree of deformation of the protruding end of the roadway bottom beam.

7. The method for assembling a steel bridge for a lane according to claim 1, characterized in that: The step S7 includes the following steps: S7.1: Securely install the end outer truss members at the extended end of the roadway bottom beam; S7.2: Install truss connectors on top of the end outboard truss members; S7.3: The inner end truss member is fixedly connected to the outer end truss member through the middle connecting member; S7.4: Install inverted end outboard truss members on top of truss connectors; S7.5: Install truss connectors on top of the inverted end outboard truss members; S7.6: The inverted end inner truss member is fixedly connected to the inverted end outer truss member by a middle connector; S7.7: Install the inner outer truss member on the inner side of the end outer truss member, repeat steps S7.2 to S7.6 until the inner and outer truss members on both sides abut against each other, and then fix the inner and outer truss member located in the middle position.

8. The method for assembling a steel bridge for a lane according to claim 1, characterized in that: The step S8 includes the following steps: S8.1: Securely install the end sidewalk sill beam at the extended end of the end roadway sill beam; S8.2: An internal sidewalk sill shall be fixedly installed at the extended end of the internal roadway sill; S8.3: Verify that the projecting end of the end sidewalk sill is flush with the projecting end of the interior sidewalk sill.

9. The method for assembling a steel bridge for a lane according to claim 1, characterized in that: The step S9 includes the following steps: S9.1: Securely install the sidewalk decking on top of the sidewalk sill; S9.2: Inspect and verify that the tops of adjacent sidewalk panels are flush with each other after installation; S9.3: Check and verify that the spacing between adjacent sidewalk panels after installation meets the preset requirements; S9.4: Inspect and verify that the spacing between the inside and outside truss members of the sidewalk deck meets the preset requirements after installation.

10. The method for assembling a steel bridge for a lane according to claim 1, characterized in that: The step S10 includes the following steps: S10.1: Conduct a no-load test on the sidewalk in a windless environment and determine the lower limit of the deformation degree of the sidewalk based on the test results; S10.2: Conduct a full-load test on the sidewalk in a windy environment and determine the upper limit of the sidewalk deformation based on the test results; S10.3: Determine the recommended installation parameters of the sidewalk based on the upper and lower limits of the sidewalk deformation degree; S10.4: Correct the initial parameters of the steel frame bridge in step S1 according to the difference between the preset installation parameters of the sidewalk and the recommended installation parameters of the sidewalk.

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