A construction method for TOD fire lane over-slope bridge high formwork

Abstract

The application discloses a kind of for TOD fire lane air ramp bridge type high formwork construction method, including drawing deepening blanking, measurement lofting, foundation setting, steel column installation, longitudinal, transverse beam installation, platform steel plate installation, high formwork frame body erection and concrete pouring.The application is provided with diamond platform steel plate on the top of steel platform, and the steel platform structure of rhombohedron is formed following the scope of ramp formwork, so that the space utilization of high formwork frame body sitting on the steel platform is maximized, and the net height of at least 6m, net width of at least 4.5m door-shaped hole is formed by transverse i-shaped steel beam and steel column located on both sides of steel platform, and then all construction vehicles and fire vehicles can be smoothly in and out.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, and in particular relates to a method for high-support formwork construction of ramp bridges above TOD fire lanes. Background Technology

[0002] TOD stands for "Transit-Oriented Development." Public transportation primarily refers to rail transit such as train stations, airports, subways, and light rail, as well as bus routes. A central plaza or city center is established within a 400-800 meter radius (5-10 minute walk) around a bus stop. Its characteristic is a "mixed-use" development integrating work, commerce, culture, education, and residence, allowing residents and employees to conveniently choose from public transportation, bicycles, walking, and other modes of transportation without excluding private cars. Urban redevelopment sites, infill sites, and newly developed land can all be constructed using the TOD concept. The main approach of TOD is to coordinate the contradictions between traffic congestion and land shortages arising during urban development through land use and transportation policies.

[0003] With the acceleration of urbanization, TOD (Transit-Oriented Development) communities have been established in many cities, with subway-connected projects being the most prominent. Most subway-connected projects involve building residential housing on top of a subway station's operational depot. A fire lane is built around the depot as a backup for fire routes, and the ramps for the residential housing units must be erected above this fire lane to allow traffic. Furthermore, construction on these projects often takes place after the subway depot has been handed over for operation, making it impossible to pre-plan or pre-install any necessary measures, and the existing structure cannot be damaged. If traditional methods of erecting full-span scaffolding and formwork were used to construct the ramps above the fire lane, it would obstruct the operation of subway vehicles, significantly impacting the entire subway depot. Summary of the Invention

[0004] This invention provides a method for constructing a high-support formwork structure for an overpass ramp above a TOD fire lane, which can effectively solve the above-mentioned problems.

[0005] This invention is implemented as follows:

[0006] A method for constructing a high-formwork bridge-type ramp above a TOD fire lane includes the following steps:

[0007] S1. Drawing Detailing and Material Cutting: First, compare the drawings below and above the cover. After the comparison, review the existing components on site and confirm the open spaces. Then, after the on-site review, use the drawings to pre-design the steel platform. To facilitate the movement of subway construction vehicles below, the steel platform should have a clear height of at least 6m and a clear width of at least 4.5m. Secondly, to maximize space utilization, the steel platform is a rhomboid quadrilateral structure. After the design is completed, perform 3D modeling and stress analysis. Finally, cut the materials according to the model, generate a component list, and start production in the factory.

[0008] S2. Surveying and Setting Out: After the steel platform position is located on the drawings, the surveyor will export the coordinates according to the column positions shown on the drawings. Then, the RTK will be used to transfer the points to the cover plate. The total station will then be used to measure and set out the lines through the RTK reference points. After the steel column positions are located, the 1m axis line will be marked on the outside of the steel column with a chalk line. Then, the setting out will be carried out. After the axis lines of the steel columns on both sides of the steel platform are set out, the boundary line of the long steel plate base will be marked with a chalk line. The boundary line is used for the foundation setting of the steel platform.

[0009] S3. Basic setup: First, evenly lay a 30mm thick sand pad layer within the boundary line of the long steel plate base, and then hoist the long steel plate base to the measurement and layout position.

[0010] S4. Steel Column Installation: After the foundation steel plate is marked, the steel columns are hoisted. Each steel column must be fully welded to the foundation steel plate after hoisting. After the steel columns are welded, upper supports and lower supports are installed 30cm from the top and 30cm from the bottom of the steel columns, respectively. Steel pipes are installed on the upper and lower supports, and the steel pipes run through several steel columns. Finally, the steel pipes on the upper supports and the steel pipes on the lower supports are connected by scissor bracing, so that several steel columns are connected as one unit, thereby ensuring the stability of the steel columns.

[0011] S5. Installation of longitudinal and transverse beams: Longitudinal I-beams are installed on the top of the steel columns, and the contact surfaces of the longitudinal I-beams and the top of the steel columns are fully welded together. After the longitudinal I-beams are installed, the position of each transverse I-beam is marked on the top of the longitudinal I-beams with chalk. After the marking is completed, the transverse I-beams are hoisted to the marked positions. Finally, the contact surfaces of the transverse I-beams and the longitudinal I-beams are fully welded together.

[0012] S6. Platform steel plate installation: First, hoist the platform steel plate to the top of the I-beam. After the platform steel plate is hoisted, weld a 10cm weld every 50cm at the joint between the platform steel plate and the I-beam. That is, spot weld every contact surface between the platform steel plate and the I-beam to ensure that the platform steel plate is firm and reliable.

[0013] S7. Erection of high formwork support frame: Set up scaffolding across the opening around the steel platform as the operating frame for high formwork support, and set wooden pads at the bottom of each high formwork support column to increase the bearing area of ​​the steel column;

[0014] S8. Concrete pouring: During the concrete pouring process, a dedicated person must be assigned to inspect and manage traffic below the steel platform, and to observe the condition of the steel platform frame at all times.

[0015] As a further improvement, S3 specifically refers to:

[0016] S301. A sand pad layer with a thickness of 30mm is evenly laid inside the boundary line of the long steel plate base.

[0017] S302. Erect a 25T tower crane outside the fire truck access road. Use lifting clamps to lift the long steel plate base horizontally from outside the site. When lifting, first lift it to 100mm above the ground to check its lifting stability, then slowly raise it and gradually lift it to the measurement and layout position.

[0018] S303. When approaching the boundary line of the long steel plate base, two operators shall position and adjust the long steel plate base and then slowly lower it to ensure the accuracy of the installation position of the long steel plate base.

[0019] S304. After hoisting is completed, check the flatness of the long steel plate base with a level and make some adjustments to the long steel plate base.

[0020] As a further improvement, S6 specifically includes:

[0021] S601. First, hoist the platform steel plate to the top of the I-beam. After the initial hoisting of the platform steel plate is completed, remove the special clamps to the end of the steel plate and hoist it again. Then, adjust the position of the platform steel plate.

[0022] S602. After the platform steel plate is hoisted, weld a 10cm weld every 50cm at the joint between the platform steel plate and the I-beam. That is, spot weld each contact surface between the platform steel plate and the I-beam to ensure that the platform steel plate is firm and reliable.

[0023] S603 Finally, after hoisting is completed, the steel plate of the suspended platform outside the I-beam must be cut off to prevent people from stepping into the air.

[0024] As a further improvement, the steel platform is located inside the high formwork frame, and the steel platform includes:

[0025] The steel column has its bottom welded to a long steel plate base. The side of the steel column is provided with upper and lower horizontal bars at parallel intervals. A scissor brace is provided between the upper and lower horizontal bars. The top of the steel column is provided with a longitudinal I-beam, and a transverse I-beam is provided on the longitudinal I-beam.

[0026] As a further improvement, a 30mm thick sand cushion layer is laid at the bottom of the long steel plate base, and the long steel plate base and the sand cushion layer at its bottom constitute a raft foundation.

[0027] As a further improvement, the sand pad layer is laid with coarse sand with a particle size of 2.0mm-4.75mm, and the dynamic friction coefficient between the bottom of the long steel plate base and the sand pad layer is 0.6-0.8.

[0028] As a further improvement, a wooden pad is provided on top of the steel platform.

[0029] As a further improvement, the steel column is provided with an upper support and a lower support at a distance of 30cm from its top and bottom, respectively. The upper support is used to support the upper crossbar, and the lower support is used to support the lower crossbar.

[0030] As a further improvement, a platform steel plate is provided above the transverse I-beam, and the contact surfaces between the platform steel plate and the transverse I-beam are reinforced by spot welding.

[0031] The beneficial effects of this invention are:

[0032] 1. The raft foundation, consisting of a long steel plate base at the bottom of the steel column and a sand cushion layer below it, does not require pre-embedded parts in the original structure for fixation. This approach solves the problem of pre-embedding in the formed fire truck access road and ensures the stability of the steel column of the rhomboid steel platform.

[0033] 2. The steel column is connected and fixed as a whole by setting upper and lower horizontal bars on the side. The overall integrity of the steel column is strengthened by setting scissor bracing between the upper and lower horizontal bars, thus ensuring the lateral rigidity of the steel column.

[0034] 3. By setting a through-beam longitudinal beam at the top of the steel column as the main beam of the platform, and then evenly distributing I-beam crossbeams on the main beams on both sides of the steel platform as secondary beams, the loads from the upper part are jointly borne, thereby improving the overall load-bearing capacity of the steel platform.

[0035] 4. A gate-shaped opening with a clear height of at least 6m and a clear width of at least 4.5m is formed by the horizontal I-beams and the steel columns located on both sides of the steel platform, which can meet the needs of all construction vehicles and fire trucks to enter and exit smoothly.

[0036] 5. By setting a diamond-shaped platform steel plate on the top of the steel platform, a diamond-shaped steel platform structure is formed along the ramp template range, maximizing the space utilization of the high formwork frame located on the steel platform.

[0037] 6. By setting wooden pads at the bottom of the high formwork frame and the top of the diamond-shaped steel platform, the load on the uprights of the high formwork frame is evenly distributed on the platform through the wooden pads, which greatly improves the load-bearing capacity of the steel platform and meets the foundation bearing capacity required for the construction of the high formwork frame of the ramp. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the construction steps of the present invention;

[0040] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0041] Figure 3 This is a schematic diagram of the overall structure of the steel platform in this invention.

[0042] Figure label:

[0043] 1-Platform steel plate, 2-Transverse I-beam, 3-Longitudinal I-beam, 4-Upper support, 5-Upper crossbar, 6-Steel column, 7-Scissor brace, 8-Lower crossbar, 9-Lower support, 10-Long steel plate base, 11-Sand cushion layer, 12-Wooden pad, 13-High formwork frame. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] In the description of this invention, the terms "upper," "lower," "above," "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0046] Reference Figure 1 As shown in the figure, this embodiment provides a method for constructing a high-formwork bridge-type ramp above a TOD fire lane, including the following steps:

[0047] S1. Drawing Detailing and Material Cutting: First, compare the drawings below and above the cover. After the comparison, review the existing components on site and confirm the open spaces. Then, after the on-site review, use the drawings to pre-design the steel platform. To facilitate the movement of subway construction vehicles below, the steel platform should have a clear height of at least 6m and a clear width of at least 4.5m. Secondly, to maximize space utilization, the steel platform is a rhomboid quadrilateral structure. After the design is completed, perform 3D modeling and stress analysis. Finally, cut the materials according to the model, generate a component list, and start production in the factory.

[0048] S2. Surveying and Setting Out: After the steel platform position is located on the drawing, the surveyor will export the coordinates according to the column position shown on the drawing. Then, the RTK will be used to transfer the points to the cover plate. The total station will be used to measure and set out the lines through the RTK reference points. After the position of the steel column 6 is located, the axis line of 1m will be marked on its outer side with a chalk line. Then, the setting out will be carried out. After the axis lines of the steel columns 6 on both sides of the steel platform are set out, the boundary line of the long strip steel plate base 10 will be marked with a chalk line. The boundary line is used for the foundation setting of the steel platform.

[0049] S3. Basic setup: First, evenly lay a 30mm thick sand pad layer 11 within the boundary line of the long steel plate base 10, and then hoist the long steel plate base 10 to the measurement and layout position.

[0050] S4. Steel Column 6 Installation: After the foundation steel plate is marked, the steel columns 6 are hoisted. After each steel column 6 is hoisted, it must be fully welded to the foundation steel plate. After the steel columns 6 are welded, an upper support 4 and a lower support 9 are respectively installed 30cm from the top and 30cm from the bottom of the steel columns 6. Steel pipes are installed on the upper support 4 and the lower support 9. The steel pipes pass through several steel columns 6. Finally, the steel pipes on the upper support 4 and the steel pipes on the lower support 9 are connected by scissor braces 7, so that several steel columns 6 are connected as one, thereby ensuring the stability of the steel columns 6.

[0051] S5. Installation of longitudinal and transverse beams: A longitudinal I-beam 3 is installed on the top of the steel column 6, and the contact surface between the longitudinal I-beam 3 and the top of the steel column 6 is fully welded. After the longitudinal I-beam 3 is installed, the position of each transverse I-beam 2 is marked on the top of the longitudinal I-beam 3 with chalk. After the marking is completed, the transverse I-beam 2 is hoisted to the marked position. Finally, the contact surface between the transverse I-beam 2 and the longitudinal I-beam 3 is fully welded.

[0052] S6. Platform steel plate 1 installation: First, hoist the platform steel plate 1 to the top of the I-beam. After the platform steel plate 1 is hoisted, weld a 10cm weld every 50cm at the joint between the platform steel plate 1 and the I-beam. That is, spot weld each contact surface between the platform steel plate 1 and the I-beam to ensure that the platform steel plate 1 is firm and reliable.

[0053] S7. Erection of high formwork support frame 13: Set up scaffolding across the opening around the steel platform as the operating frame for high formwork support, and set wooden pads 12 at the bottom of each high formwork support column to increase the bearing area of ​​the steel column 6.

[0054] S8. Concrete pouring: During the concrete pouring process, a dedicated person must be assigned to inspect and manage traffic below the steel platform, and to observe the condition of the steel platform frame at all times.

[0055] Furthermore, S3 specifically refers to:

[0056] S301. A sand pad layer 11 with a thickness of 30mm is evenly laid within the boundary line of the long steel plate base 10.

[0057] S302. A 25T tower crane is erected outside the fire truck lane. The long steel plate base 10 is lifted horizontally from the site using lifting clamps. When lifting, it is first lifted to 100mm above the ground to check its lifting stability, and then slowly raised and gradually lifted to the measurement and layout position.

[0058] S303. When approaching the boundary line of the long steel plate base 10, two operators shall position and adjust the long steel plate base 10 and then slowly lower it to ensure the accuracy of the installation position of the long steel plate base 10.

[0059] S304. After hoisting is completed, check the flatness of the long steel plate base 10 with a level and make some adjustments to the long steel plate base 10.

[0060] Furthermore, S6 specifically includes:

[0061] S601. First, hoist the platform steel plate 1 to the top of the I-beam. After the initial hoisting of the platform steel plate 1 is completed, remove the special clamps to the end of the steel plate and hoist it again. Then, adjust the position of the platform steel plate 1.

[0062] S602. After the platform steel plate 1 is hoisted, weld a 10cm weld every 50cm at the joint between the platform steel plate 1 and the I-beam. That is, spot weld each contact surface between the platform steel plate 1 and the I-beam to ensure that the platform steel plate 1 is firm and reliable.

[0063] S603 Finally, after hoisting is completed, the steel plate 1 of the suspended platform outside the I-beam must be cut off to prevent personnel from stepping into the air.

[0064] The above construction method can ensure the passage of subway fire lanes during construction without damaging the existing structure.

[0065] refer to Figure 2-3 In this embodiment, the steel platform is located inside the high formwork frame 13, and the steel platform includes:

[0066] A steel column 6 is provided, the bottom of which is welded to a long steel plate base 10. An upper crossbar 5 and a lower crossbar 8 are provided parallel to each other on the side of the steel column 6. A scissor brace 7 is provided between the upper crossbar 5 and the lower crossbar 8. A longitudinal I-beam 3 is provided on the top of the steel column 6. A transverse I-beam 2 is provided on the longitudinal I-beam 3.

[0067] The steel column 6 is connected and fixed as a whole by setting an upper horizontal bar 5 and a lower horizontal bar 8 on the side. The integrity of the steel column 6 is strengthened by setting a scissor brace 7 between the upper horizontal bar 5 and the lower horizontal bar 8, thus ensuring the lateral rigidity of the steel column 6.

[0068] Furthermore, a 30mm thick sand cushion layer 11 is laid at the bottom of the long steel plate base 10. The long steel plate base 10 and the sand cushion layer 11 at its bottom form a raft foundation. The sand cushion layer is laid with coarse sand with a particle size of 2.0mm-4.75mm, and the dynamic friction coefficient between the bottom of the long steel plate base and the sand cushion layer is 0.6-0.8.

[0069] The raft foundation, consisting of a long steel plate base 10 at the bottom of the steel column 6 and a sand cushion layer 11 below it, eliminates the need for pre-embedded parts in the original structure for fixation. This approach solves the problem of pre-embedding parts in the existing fire truck access road. Furthermore, by controlling the dynamic friction factor between the long steel plate base 10 and the sand cushion layer 11 to 0.6-0.8, the stability of the steel column 6 of the steel platform is ensured. In addition, the sand cushion layer 11 also serves to level the original fire truck access road surface, ensuring the flatness of the foundation structure.

[0070] Furthermore, the steel columns 6 are provided in several groups, and the steel columns 6 are arranged obliquely and parallel, that is, the steel columns 6 and the transverse I-beam 2 form a rhombic structure.

[0071] By setting a platform steel plate 1 on the top of the steel platform, a rhomboid steel platform structure is formed following the ramp template range, so that the space utilization of the high formwork frame 13 located on the steel platform is maximized.

[0072] Furthermore, a wooden pad 12 is provided on the top of the steel platform, and a wooden pad 12 is also provided on the bottom of the high formwork frame 13.

[0073] By setting wooden pads 12 at the bottom of the high formwork frame 13 and the top of the rhomboid steel platform, the load on the uprights of the high formwork frame 13 is evenly distributed on the platform through the wooden pads 12, which greatly improves the load-bearing capacity of the steel platform and meets the foundation bearing capacity required for the construction of the high formwork frame 13 of the ramp.

[0074] Furthermore, the steel column 6 is provided with an upper support 4 and a lower support 9 at a distance of 30cm from its top and bottom, respectively. The upper support 4 is used to support the upper crossbar 5, and the lower support 9 is used to support the lower crossbar 8.

[0075] By setting up the upper support 4 and the lower support 9, support and positioning are provided for the upper crossbar 5 and the lower crossbar 8, which facilitates the welding process of the upper crossbar 5 and the lower crossbar 8.

[0076] Furthermore, a platform steel plate 1 is provided above the transverse I-beam 2, and the contact surfaces between the platform steel plate 1 and the transverse I-beam 2 are reinforced by spot welding.

[0077] The beneficial effects of this embodiment are as follows: The raft foundation, consisting of a long steel plate base 10 at the bottom of the steel column 6 and a sand cushion layer 11 below it, eliminates the need for pre-embedded parts in the original structure. This solves the problem of pre-embedding parts in the formed fire truck access road, ensuring the stability of the steel column 6 of the rhomboid steel platform. The steel column 6 is integrally connected and fixed by upper and lower horizontal bars 5 and 8 on its sides. The scissor bracing 7 between the upper and lower horizontal bars 5 and 8 strengthens the overall integrity of the steel column 6, ensuring its lateral rigidity. A through-beam longitudinal beam at the top of the steel column 6 serves as the platform's main beam. I-beam transverse beams are evenly distributed on the main beams on both sides of the steel platform as secondary beams, jointly bearing the load from above, thus improving the overall load-bearing capacity of the steel platform. The transverse I-beam beams 2 and the steel columns 6 on both sides of the steel platform form a U-shaped opening with a clear height of at least 6m and a clear width of at least 4.5m, allowing unimpeded access for all construction vehicles and fire trucks. By installing a diamond-shaped platform steel plate 1 on top of the steel platform, a diamond-shaped steel platform structure is formed along the ramp formwork area, maximizing the space utilization of the high formwork frame 13 situated on the steel platform. By installing wooden pads 12 at the bottom of the high formwork frame 13 and on top of the diamond-shaped steel platform, the load on the uprights of the high formwork frame 13 is evenly distributed across the platform through the wooden pads 12, greatly improving the load-bearing capacity of the steel platform and meeting the foundation bearing capacity requirements for the construction of the ramp high formwork frame 13.

[0078] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for constructing a high-formwork bridge-type ramp above a TOD fire truck access road, characterized in that, Includes the following steps: S1. Drawing Detailing and Material Cutting: First, compare the drawings below and above the cover. After the comparison, check the existing components on site and confirm the open spaces. Then, after the on-site check, use the drawings to pre-design the steel platform. To facilitate the movement of subway construction vehicles and fire trucks below, the steel platform should have a clear height of at least 6m and a clear width of at least 4.5m. Secondly, to maximize space utilization, the steel platform is a rhombic steel platform structure formed by following the ramp template. After the design is completed, perform 3D modeling and stress analysis. Finally, cut the materials according to the model, issue a component list, and produce the components in the factory. S2. Surveying and Setting Out: After the steel platform position is located on the drawings, the surveyor will export the coordinates according to the column positions shown on the drawings. Then, the RTK will be used to transfer the points to the cover plate. The total station will then be used to measure and set out the lines through the RTK reference points. After the steel column positions are located, the 1m axis line will be marked on the outside of the steel column with a chalk line. Then, the setting out will be carried out. After the axis lines of the steel columns on both sides of the steel platform are set out, the boundary line of the long steel plate base will be marked with a chalk line. The boundary line is used for the foundation setting of the steel platform. S3. Basic setup: First, evenly lay a 30mm thick sand cushion layer within the boundary line of the long steel plate base. Then, hoist the long steel plate base to the measurement and layout position. The long steel plate base and the sand cushion layer laid on the base constitute a raft foundation. S4. Steel Column Installation: After the long steel plate base is marked, the steel columns are hoisted. After each steel column is hoisted, it must be fully welded to the long steel plate base. After the steel columns are welded, upper supports and lower supports are installed 30cm from the top and 30cm from the bottom of the steel columns, respectively. Steel pipes are installed on the upper and lower supports, and the steel pipes run through several steel columns. Finally, the steel pipes on the upper supports and the steel pipes on the lower supports are connected by scissor bracing, so that several steel columns are connected as one unit, thereby ensuring the stability of the steel columns. S5. Installation of longitudinal and transverse beams: Longitudinal I-beams are installed on the top of the steel columns, and the contact surfaces of the longitudinal I-beams and the top of the steel columns are fully welded together. After the longitudinal I-beams are installed, the position of each transverse I-beam is marked on the top of the longitudinal I-beams with chalk. After the marking is completed, the transverse I-beams are hoisted to the marked positions. Finally, the contact surfaces of the transverse I-beams and the longitudinal I-beams are fully welded together. S6. Platform steel plate installation: First, hoist the platform steel plate to the top of the I-beam. After the platform steel plate is hoisted, weld a 10cm weld every 50cm at the joint between the platform steel plate and the I-beam. That is, spot weld every contact surface between the platform steel plate and the I-beam to ensure that the platform steel plate is firm and reliable. S7. Erection of high formwork support frame: Set up scaffolding across the opening around the steel platform as the operating frame for high formwork support, and set wooden pads at the bottom of each high formwork support column to increase the bearing area of ​​the steel column; S8. Concrete pouring: During the concrete pouring process, a dedicated person must be assigned to inspect and manage traffic below the steel platform, and to observe the condition of the steel platform frame at all times.

2. The method for constructing a high-support formwork bridge for an overpass ramp above a TOD fire truck lane according to claim 1, characterized in that, Specifically, S3 is: S301. A sand pad layer with a thickness of 30mm is evenly laid inside the boundary line of the long steel plate base. S302. Erect a 25T tower crane outside the fire truck access road. Use lifting clamps to lift the long steel plate base horizontally from outside the site. When lifting, first lift it to 100mm above the ground to check its lifting stability, then slowly raise it and gradually lift it to the measurement and layout position. S303. When approaching the boundary line of the long steel plate base, two operators shall position and adjust the long steel plate base and then slowly lower it to ensure the accuracy of the installation position of the long steel plate base. S304. After hoisting is completed, check the flatness of the long steel plate base with a level and make some adjustments to the long steel plate base.

3. The method for constructing a high-support formwork bridge for an overpass ramp above a TOD fire truck lane according to claim 1, characterized in that, Specifically, S6 is: S601. First, hoist the platform steel plate to the top of the I-beam. After the initial hoisting of the platform steel plate is completed, remove the special clamps to the end of the steel plate and hoist it again. Then, adjust the position of the platform steel plate. S602. After the platform steel plate is hoisted, weld a 10cm weld every 50cm at the joint between the platform steel plate and the I-beam. That is, spot weld each contact surface between the platform steel plate and the I-beam to ensure that the platform steel plate is firm and reliable. S603 Finally, after hoisting is completed, the steel plate of the suspended platform outside the I-beam must be cut off to prevent people from stepping into the air.

4. The method for constructing a high-support formwork bridge for an overpass ramp above a TOD fire truck lane according to claim 1, characterized in that, The sand pad layer is laid with coarse sand with a particle size of 2.0mm-4.75mm, and the coefficient of dynamic friction between the bottom of the long steel plate base and the sand pad layer is 0.6-0.

8.

5. The method for constructing a high-support formwork bridge for an overpass ramp above a TOD fire truck lane according to claim 1, characterized in that, The top of the steel platform is provided with a wooden pad, and the bottom of the high formwork frame is also provided with a wooden pad.

6. The method for constructing a high-support formwork bridge for an overpass above a TOD fire truck lane according to claim 1, characterized in that, A platform steel plate is installed above the transverse I-beam, and the contact surfaces between the platform steel plate and the transverse I-beam are reinforced by spot welding.

Images