Construction method of special-shaped bearing platform

Abstract

The present invention relates to a construction method for a special-shaped bearing platform, including: construction of the bearing platform concrete cushion and the bottom formwork of the tie rod corbel, construction of the tie rod positioning bracket, construction of the precise embedded installation bracket for the inclined strut, construction of the bearing platform and arrangement of the circulation pipeline, and construction of the arch foot foundation. The beneficial effects of the present invention are as follows: it can not only improve the stability and accuracy of the positioning and installation of the tie rod and the inclined strut, avoid the settlement and deformation of the bottom formwork, improve the binding accuracy and efficiency of the inclined steel bars at the arch foot, effectively prevent the occurrence of temperature difference cracks, but also improve the construction quality and efficiency, greatly improve the construction efficiency of on-site steel bar binding, cooling pipe installation, etc., save manpower and costs, and can achieve good technical and economic benefits when applied to actual projects.

Description

Technical Field

[0001] The present invention belongs to the field of bridge engineering, and relates to a construction method for a special-shaped bearing platform, which is applicable to the construction of special-shaped bearing platforms and is also applicable to the construction of mass concrete pouring. Background Art

[0002] With the high-quality development of highway construction projects in China, a large number of long-span bridges with novel shapes have emerged. The bearing platforms of such bridges are basically mass concrete structures. The special-shaped bearing platform has a complex structure and high operation precision requirements. At the same time, how to control the pouring quality of mass concrete during the construction of the special-shaped bearing platform and prevent the generation of temperature cracks is also the key point of construction. At present, problems such as low construction efficiency and inability to guarantee quality often occur during construction.

[0003] In view of this, aiming at the deficiencies in the construction of special-shaped bearing platforms in the past, a new construction method for special-shaped bearing platforms is urgently needed to improve construction efficiency, enhance construction quality, and ensure the safety and reliability of construction quality. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a construction method for a special-shaped bearing platform.

[0005] This construction method for a special-shaped bearing platform includes the following steps:

[0006] Step 1, construction of the bearing platform concrete cushion and the bottom form of the tie rod bracket: Pour the cushion, install the prefabricated panel on the cushion, set the concrete bottom form on the prefabricated panel, and set the steel mesh in the concrete bottom form;

[0007] Step 2, construction of the tie rod positioning bracket: Build a tie rod positioning bracket on the embedded base plate through a vertical steel frame, a rectangular frame plate, and a triangular top plate with a tie rod insertion hole;

[0008] Step 3, construction of the precise embedded installation bracket for the inclined strut: Build a precise embedded installation bracket for the inclined strut through a long steel positioning bracket and a short steel positioning bracket with a hydraulic jack and a triangular support, and set a top support inclined strut fixing piece;

[0009] Step 4, construction of the bearing platform and arrangement of the circulation pipeline: Bind the bearing platform steel bars; divide the bearing platform into blocks and arrange the circulation pipelines separately, and synchronously lay the cooling pipes, the bearing platform erection bars, and the temperature measuring elements during the concrete pouring process; construct the side form of the bearing platform and pour the concrete, and at the same time, let water flow through the cooling pipes, and cure after pouring;

[0010] Step 5, construction of the arch foot foundation: Bind the steel bars on the bearing platform by using the positioning bars in the in-situ binding auxiliary jig for the inclined arch foot steel bars, then form the formwork and pour the concrete; after curing, carry out the construction of the tie rod, the steel main beam, the inclined strut, and the side arch.

[0011] Preferably, the bottom formwork of the tie rod bracket includes a concrete bottom formwork, a steel mesh sheet, and an assembled precast slab. The assembled precast slab is installed on the cushion layer, the concrete bottom formwork is arranged on the upper layer of the assembled precast slab, and the steel mesh sheet is arranged in the concrete bottom formwork.

[0012] Preferably, in step two, the tie rod positioning bracket includes a buried cushion plate, a vertical steel frame, a reinforcing steel plate, positioning scale lines, a rectangular frame plate, a triangular top plate, and a tie rod penetration hole. The vertical steel frame is arranged on the buried cushion plate, the reinforcing steel plate is connected to the vertical steel frame, the positioning scale lines are arranged on the vertical steel frame, the rectangular frame plate is arranged on the horizontal vertical steel frame, the triangular top plate is arranged on the rectangular frame plate, and the tie rod penetration hole is arranged at the included angle at the top of the triangular top plate.

[0013] Preferably, in step three, for the accurate embedded installation support system of the diagonal brace, the accurate embedded installation support system of the diagonal brace includes a steel cushion plate, a long-shaped steel positioning bracket, a reinforcing connecting plate, a top plate, a hydraulic jack, a triangular support frame, a diagonal brace fixing part top plate, a diagonal brace fixing part web plate, a diagonal brace fixing part bottom plate, and a short-shaped steel positioning bracket. The steel cushion plate is fixed on the cushion layer, the long-shaped steel positioning bracket and the short-shaped steel positioning bracket are fixed on the steel cushion plate, one end of the reinforcing connecting plate is fixed on the long-shaped steel positioning bracket, and the other end is fixed on the short-shaped steel positioning bracket. The top plate is arranged on the tops of the long-shaped steel positioning bracket and the short-shaped steel positioning bracket. The hydraulic jack is arranged on the top plate. The triangular support member is arranged on the upper part of the hydraulic jack. The diagonal brace fixing part bottom plate is arranged on the short-shaped steel positioning bracket on the short-shaped steel positioning bracket. The diagonal brace fixing part web plate is arranged on the diagonal brace fixing part bottom plate. The diagonal brace fixing part top plate is arranged on the diagonal brace fixing part web plate.

[0014] Preferably, in step four, position and tie the bearing platform steel bars according to the spacing in the design drawings; divide the bearing platform into blocks, arrange a single-loop pipeline for each block, and lay it during the concrete pouring process according to the position of the cooling water pipes on each layer. The bearing platform erection bars and temperature measuring elements are arranged in the bearing platform. The vertical fixing bars of the cooling pipes and the horizontal fixing bars of the cooling pipes are fixed on the bearing platform erection bars. The cooling pipe arrangement is fixed on the vertical fixing bars of the cooling pipes and the horizontal fixing bars of the cooling pipes. The water inlet and the water outlet are arranged at both ends of the cooling pipe. After the cooling pipe is installed and fixed, the pipeline is filled with water, and the water inlet and the water outlet are blocked. When the bearing platform starts to be poured, then the cooling pipe is filled with water.

[0015] Preferably, in step four, monitor the temperature field change of the mass concrete through the temperature measuring element. When the temperature difference between the highest temperature inside the concrete and the lowest ambient temperature at that time is less than or equal to ℃, stop passing cooling water; after the concrete is poured, carry out covering and sprinkling curing.

[0016] Preferably, in Step 5, the in-situ binding auxiliary jig for the inclined arch-foot steel bars includes a steel section fixed base, a steel section fixed groove, a vertical steel section, a horizontal steel section, a horizontal positioning bar, an inclined positioning steel bar, and a vertical positioning bar. The steel section fixed base is fixed on the pile cap, the steel section fixed groove is arranged in the steel section fixed base, the vertical steel section is fixed on the steel section fixed groove, the horizontal steel section connects and fixes two vertical steel sections, the vertical positioning bar is fixed on the horizontal steel section, the inclined positioning steel bar is connected to the vertical positioning bar, and the horizontal steel bar is fixed on the vertical positioning bar.

[0017] Preferably, pier columns are provided at the bottom of the cushion layer. The tie rods are arranged on the tie rod positioning brackets, the diagonal braces are fixed on the accurately pre-embedded installation brackets for diagonal braces, the arch support foundation is arranged on the pile cap, one end of the side arch is connected to the arch-foot foundation, and the steel main girder is arranged above the tie rods and diagonal braces.

[0018] The special-shaped pile cap is obtained by any of the above methods.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1) Through the construction of the bottom formwork of the tie rod corbel, a steel mesh is arranged in the concrete bottom formwork, avoiding the settlement and deformation of the bottom formwork, ensuring the effective control of settlement cracks during the concrete pouring and forming process of the cantilever tie rod corbel structure, being convenient to apply and having a low cost.

[0021] 2) The construction is carried out by adopting the positioning and installation technology of tie rod embedded parts and the accurately pre-embedded installation bracket system for diagonal braces. The installation accuracy of the tie rods and diagonal braces is high, the operation is simple, it is convenient to adjust, and the materials can be reused.

[0022] 3) The in-situ binding of the arch-foot steel bars is carried out by using the in-situ binding auxiliary jig for the inclined arch-foot steel bars, improving the installation accuracy of the steel bars and the construction efficiency, and saving manpower.

[0023] 4) Through the application of the temperature control technology for mass concrete, cooling pipes and temperature measuring elements are synchronously arranged during the concrete pouring. It is convenient for on-site installation, fast in positioning, good in heat transfer effect, ensuring the overall balanced temperature drop of the mass concrete of the tie rod corbel and the pile cap, and avoiding temperature difference cracks. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the front view of the special-shaped pile cap structure of the present invention;

[0025] Figure 2 is the side view of the special-shaped pile cap structure of the present invention;

[0026] Figure 3 is the schematic diagram of the bottom formwork structure of the tie rod corbel;

[0027] Figure 4 is the front view of the tie rod positioning bracket structure;

[0028] Figure 5 It is a side view of the structure of the tie rod positioning bracket;

[0029] Figure 6 It is a front view of the structure of the auxiliary jig for in-situ binding of the diagonal steel bars at the arch foot;

[0030] Figure 7 It is a side view of the structure of the auxiliary jig for in-situ binding of the diagonal steel bars at the arch foot;

[0031] Figure 8 It is a front view of the structure of the precise embedded installation bracket system for the diagonal bracing;

[0032] Figure 9 It is a side view of the structure of the precise embedded installation bracket system for the diagonal bracing;

[0033] Figure 10 It is a top view of the temperature control installation layout structure for mass concrete;

[0034] Figure 11 It is a front view of the temperature control installation layout structure for mass concrete.

[0035] In the figure: 1 - pier column, 2 - cushion layer, 3 - bottom formwork of the tie rod bracket, 4 - steel bar mesh, 5 - embedded base plate, 6 - tie rod, 7 - steel main beam, 8 - diagonal bracing, 9 - side arch, 10 - arch foot foundation, 11 - concrete bottom formwork, 12 - steel bar mesh, 13 - precast assembled slab, 14 - tie rod positioning bracket, 15 - vertical steel frame, 16 - reinforcing steel plate, 17 - positioning scale line, 18 - rectangular frame plate, 19 - triangular top plate, 20 - tie rod penetration hole, 21 - steel section fixed base, 22 - steel section fixed groove, 23 - vertical steel section, 24 - horizontal steel section, 25 - horizontal positioning steel bar, 26 - diagonal positioning steel bar, 27 - vertical positioning steel bar, 28 - steel base plate, 29 - long steel section positioning bracket, 30 - reinforcing connecting plate, 31 - top plate, 32 - hydraulic jack, 33 - triangular support, 34 - top plate of the diagonal bracing fixing part, 35 - web of the diagonal bracing fixing part, 36 - bottom plate of the diagonal bracing fixing part, 37 - short steel section positioning bracket, 38 - vertical fixing bar for the cooling pipe, 39 - cooling pipe, 40 - water inlet, 41 - horizontal fixing bar for the cooling pipe, 42 - temperature measuring element, 43 - bearing reinforcement of the bearing platform, 44 - water outlet. Specific embodiments

[0036] The present invention will be further described below in conjunction with embodiments. The description of the following embodiments is only for helping to understand the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0037] Embodiment 1

[0038] As an embodiment, a construction method for a special-shaped bearing platform includes the following steps:

[0039] Step 1. Construction preparation: Conduct on-site traffic control, clean up the sundries on the bottom slab of the bearing platform, inspect and accept the construction materials entering the site, and all embedded parts have been installed.

[0040] Construction of the concrete cushion for the bearing platform: The cushion 2 is poured with plain concrete, and the size of the cushion 2 is 20 cm wider than the designed size of the bearing platform.

[0041] Construction of the bottom formwork for the tie rod corbel: The prefabricated assembled slab 13 is installed on the cushion 2, constructed in layers and subjected to secondary preloading. The concrete bottom formwork 11 is arranged on the upper layer of the prefabricated assembled slab 13, and the steel mesh 12 is arranged inside the concrete bottom formwork 11.

[0042] Step 2. Construction of the positioning support for the tie rod: After the positioning points are accurately compounded, construct the positioning support for the tie rod. The vertical steel frame 15 is arranged on the embedded base plate 5, the strengthening steel plate 16 is connected to the vertical steel frame 15, the positioning scale line 17 is arranged on the vertical steel frame 15, the rectangular frame plate 18 is arranged on the horizontal vertical steel frame 15, the triangular top plate 19 is arranged on the rectangular frame plate 18, and the tie rod insertion hole 20 is arranged at the top angle of the triangular top plate 19.

[0043] Step 3. Construction of the precise embedded installation support for the inclined strut: The steel base plate 28 is fixed on the cushion 2, the long-shaped steel positioning support 29 and the short-shaped steel positioning support 37 are fixed on the steel base plate 28, one end of the strengthening connecting plate 30 is fixed on the long-shaped steel positioning support 29, and the other end is fixed on the short-shaped steel positioning support 37. The top plate 31 is arranged on the tops of the long-shaped steel positioning support 29 and the short-shaped steel positioning support 37. The hydraulic jack 32 is arranged on the top plate 31. The triangular support 33 is arranged above the hydraulic jack 32. The bottom plate 36 of the inclined strut fixing part is arranged on the short-shaped steel positioning support 37 on the short-shaped steel positioning support 37. The web plate 35 of the inclined strut fixing part is arranged on the bottom plate 36 of the inclined strut fixing part. The top plate 34 of the inclined strut fixing part is arranged on the web plate 35 of the inclined strut fixing part.

[0044] Step 4. Construction of the steel bar binding for the bearing platform: Position and install according to the spacing in the design drawings.

[0045] Arrangement of cooling water pipes and temperature measuring points: Divide the bearing platform into blocks, and arrange a single circulation pipeline for each block. According to the position of the cooling water pipes in each layer, lay them during the concrete pouring process. The erection bars 43 of the bearing platform and the temperature measuring parts 42 are arranged inside the bearing platform. The vertical fixing bars 38 for the cooling pipes and the horizontal fixing bars 41 for the cooling pipes are fixed on the erection bars 43 of the bearing platform. The cooling pipes 39 are arranged and fixed on the vertical fixing bars 38 for the cooling pipes and the horizontal fixing bars 41 for the cooling pipes. The water inlet 40 and the water outlet 44 are arranged at both ends of the cooling pipe 39. After the cooling pipes are installed and fixed, fill the pipes with water and seal the inlet and drain pipe orifices.

[0046] Formwork installation construction: The side formwork of the bearing platform adopts wooden formwork construction. The side formwork uses bamboo plywood, and square timbers and steel pipe ribs are arranged on the back of the bearing platform formwork as its support system.

[0047] Mass concrete pouring and curing: It is transported to the construction site by a concrete mixer truck and poured. At the same time, the cooling pipe 39 is filled with water. When the temperature difference between the highest temperature inside the concrete and the lowest ambient temperature at that time is not greater than 20°C, the cooling water can be stopped. The temperature field change of the mass concrete is monitored through the temperature measuring element 42. After the concrete is poured, it is covered and watered for curing.

[0048] Step 5, Arch foot foundation construction: The steel bars are tied by using an in-situ tying auxiliary jig for the inclined steel bars at the arch foot. The steel section fixing base 21 is fixed on the bearing platform. The steel section fixing groove 22 is arranged inside the steel section fixing base 21. The vertical steel section 23 is fixed on the steel section fixing groove 22. The horizontal steel section 24 connects and fixes the two vertical steel sections 23. The vertical positioning steel bars 27 are fixed on the horizontal steel section 24. The inclined positioning steel bars 26 are connected to the vertical positioning steel bars 27. The horizontal steel bars 25 are fixed on the vertical positioning steel bars 27. Then, formwork is erected and concrete is poured.

[0049] Superstructure construction: After curing, the tie rods 6, steel main girders 7, diagonal braces 8 and side arches 9 are constructed.

[0050] After the construction is completed and inspected and accepted, the equipment and machinery are removed and withdrawn from the site.

[0051] Embodiment 2

[0052] As another embodiment, as Figures 1 to 11 shown, the special-shaped bearing platform obtained by the method described in Embodiment 1 includes a tie rod bracket bottom formwork 3, a positioning and installation technology for tie rod embedded parts, an in-situ tying auxiliary jig for inclined steel bars at the arch foot, a precise embedded installation support system for diagonal braces, and a temperature control technology for mass concrete. A cushion layer 2 is provided under the bearing platform.

[0053] The tie rod bracket bottom formwork includes a concrete bottom formwork 11, a steel bar mesh 12, and an assembled precast slab 13. The assembled precast slab 13 is installed on the cushion layer 2. The concrete bottom formwork 11 is arranged on the upper layer of the assembled precast slab 13. The steel bar mesh 12 is arranged inside the concrete bottom formwork 11;

[0054] As a specific improvement implementation, it also includes the positioning and installation technology of the tie rod embedded parts. The positioning and installation technology of the tie rod embedded parts includes an embedded base plate 5, a vertical steel frame 15, a reinforcing steel plate 16, a positioning scale line 17, a rectangular frame plate 18, a triangular top plate 19, and a tie rod penetration hole 20. The vertical steel frame 15 is arranged on the embedded base plate 5, the reinforcing steel plate 16 is connected to the vertical steel frame 15, the positioning scale line 17 is arranged on the vertical steel frame 15, the rectangular frame plate 18 is arranged on the horizontal vertical steel frame 15, the triangular top plate 19 is arranged on the rectangular frame plate 18, and the tie rod penetration hole 20 is arranged at the apex angle at the top of the triangular top plate 19.

[0055] The in-situ binding auxiliary jig for the arch foot diagonal steel bars includes a steel section fixing base 21, a steel section fixing groove 22, a vertical steel section 23, a horizontal steel section 24, a horizontal positioning bar 25, an inclined positioning steel bar 26, and a vertical positioning bar 27. The steel section fixing base 21 is fixed on the bearing platform, the steel section fixing groove 22 is arranged in the steel section fixing base 21, the vertical steel section 23 is fixed on the steel section fixing groove 22, the horizontal steel section 24 connects and fixes two vertical steel sections 23, the vertical positioning bar 27 is fixed on the horizontal steel section 24, the inclined positioning steel bar 26 is connected to the vertical positioning bar 27, and the horizontal steel bar 25 is fixed on the vertical positioning bar 27.

[0056] The precise embedded installation support system for the inclined strut includes a steel base plate 28, a long steel section positioning bracket 29, a reinforcing connecting plate 30, a top plate 31, a hydraulic jack 32, a triangular support frame 33, a top plate of the inclined strut fixing part 34, a web of the inclined strut fixing part 35, a bottom plate of the inclined strut fixing part 36, and a short steel section positioning bracket 37. The steel base plate 28 is fixed on the cushion layer 2, the long steel section positioning bracket 29 and the short steel section positioning bracket 37 are fixed on the steel base plate 28, one end of the reinforcing connecting plate 30 is fixed on the long steel section positioning bracket 29, and the other end is fixed on the short steel section positioning bracket 37. The top plate 31 is arranged on the tops of the long steel section positioning bracket 29 and the short steel section positioning bracket 37. The hydraulic jack 32 is arranged on the top plate 31. The triangular support member 33 is arranged above the hydraulic jack 32. The bottom plate of the inclined strut fixing part 36 is arranged on the short steel section positioning bracket 37 on the short steel section positioning bracket 37. The web of the inclined strut fixing part 35 is arranged on the bottom plate of the inclined strut fixing part 36. The top plate of the inclined strut fixing part 34 is arranged on the web of the inclined strut fixing part 35.

[0057] The mass concrete temperature control technology includes a vertical fixing bar 38 for cooling pipes, a cooling pipe 39, a water inlet 40, a horizontal fixing bar 41 for cooling pipes, a temperature measuring element 42, a bearing platform erection bar 43, and a water outlet 44. The bearing platform erection bar 43 and the temperature measuring element 42 are arranged in the bearing platform. The vertical fixing bar 38 and the horizontal fixing bar 41 for cooling pipes are fixed on the bearing platform erection bar 43. The cooling pipe 39 is arranged and fixed on the vertical fixing bar 38 and the horizontal fixing bar 41 for cooling pipes. The water inlet 40 and the water outlet 44 are arranged at both ends of the cooling pipe 39.

[0058] It further includes a pier column 1, a tie rod 6, a steel main beam 7, a diagonal brace 8, a side arch 9, and an arch footing 10. The pier column 1 is arranged at the bottom of the cushion layer 2. A tie rod positioning bracket 14 is provided on the bottom formwork 3 of the tie rod bracket. The tie rod 6 is arranged on the tie rod positioning bracket 14. The diagonal brace 8 is fixed on the accurately pre-embedded installation bracket for the diagonal brace. The arch footing 10 is arranged on the bearing platform. One end of the side arch 9 is connected to the arch footing 10. The steel main beam 7 is arranged above the tie rod 6 and the diagonal brace 8.

Claims

1. A construction method for a special-shaped bearing platform, characterized in that, It includes the following steps: Step 1, construction of the bearing platform concrete cushion and the bottom formwork of the tie bracket: Pour the cushion (2), install the prefabricated assembled slab (13) on the cushion (2), set the concrete bottom formwork (11) on the prefabricated assembled slab (13), and set the steel mesh (12) inside the concrete bottom formwork (11); Step 2, construction of the tie positioning bracket: Build the tie positioning bracket on the embedded base plate (5) through the vertical steel frame (15), the rectangular frame plate (18) and the triangular top plate (19) with a tie penetration hole (20); The tie positioning bracket includes an embedded base plate (5), a vertical steel frame (15), a reinforcing steel plate (16), a positioning scale line (17), a rectangular frame plate (18), a triangular top plate (19), and a tie penetration hole (20). The vertical steel frame (15) is set on the embedded base plate (5), the reinforcing steel plate (16) is connected to the vertical steel frame (15), the positioning scale line (17) is set on the vertical steel frame (15), the rectangular frame plate (18) is set on the horizontal vertical steel frame (15), the triangular top plate (19) is set on the rectangular frame plate (18), and the tie penetration hole (20) is set at the apex angle of the top of the triangular top plate (19); Step 3, construction of the precise embedded installation bracket for the inclined strut: Build the precise embedded installation bracket for the inclined strut through the long steel profile positioning bracket (29) and the short steel profile positioning bracket (37) with a hydraulic jack (32) and a triangular support (33), and set the top strut inclined strut fixing piece; The precise embedded installation bracket system for the inclined strut includes a steel base plate (28), a long steel profile positioning bracket (29), a reinforcing connecting plate (30), a top plate (31), a hydraulic jack (32), a triangular support (33), an inclined strut fixing piece top plate (34), an inclined strut fixing piece web (35), an inclined strut fixing piece bottom plate (36), and a short steel profile positioning bracket (37). The steel base plate (28) is fixed on the cushion (2), the long steel profile positioning bracket (29) and the short steel profile positioning bracket (37) are fixed on the steel base plate (28), one end of the reinforcing connecting plate (30) is fixed on the long steel profile positioning bracket (29), and the other end is fixed on the short steel profile positioning bracket (37). The top plate (31) is set on the tops of the long steel profile positioning bracket (29) and the short steel profile positioning bracket (37), the hydraulic jack (32) is set on the top plate (31), the triangular support (33) is set on the upper part of the hydraulic jack (32), the inclined strut fixing piece bottom plate (36) is set on the short steel profile positioning bracket (37) on the short steel profile positioning bracket (37), the inclined strut fixing piece web (35) is set on the inclined strut fixing piece bottom plate (36), and the inclined strut fixing piece top plate (34) is set on the inclined strut fixing piece web (35); Step 4, construction of the bearing platform and layout of the circulation pipeline: Bind the steel bars of the bearing platform; Divide the bearing platform into blocks and arrange the circulation pipelines separately, and synchronously lay the cooling pipes (39), the bearing platform erection bars (43) and the temperature measuring elements (42) during the concrete pouring process; Construct the side formwork of the bearing platform and pour the concrete, and at the same time, let water flow through the cooling pipes (39), and cure after pouring; Step 5, construction of the springing footing: On the pile cap, use the positioning bars in the in-situ binding auxiliary jig for the inclined springing bars to bind the steel bars, then formwork and pour concrete; after curing, carry out the construction of the tie rod (6), steel main beam (7), diagonal brace (8) and side arch (9); there is a pier column (1) at the bottom of the cushion layer (2), the tie rod (6) is arranged on the tie rod positioning bracket (14), the diagonal brace (8) is fixed on the accurately pre-embedded installation bracket for the diagonal brace, the springing footing (10) is arranged on the pile cap, one end of the side arch (9) is connected to the springing footing (10), and the steel main beam (7) is arranged above the tie rod (6) and the diagonal brace (8).

2. The construction method of the special-shaped bearing platform according to claim 1, characterized in that The bottom formwork (3) of the tie rod bracket includes a concrete bottom formwork (11), a steel bar mesh (12) and an assembled precast slab (13). The assembled precast slab (13) is installed on the cushion layer (2), the concrete bottom formwork (11) is arranged on the upper layer of the assembled precast slab (13), and the steel bar mesh (12) is arranged in the concrete bottom formwork (11).

3. The construction method of the special-shaped bearing platform according to claim 1, characterized in that, In Step 4, position and bind the steel bars of the pile cap according to the spacing in the design drawings; divide the pile cap into blocks, arrange a single-loop pipeline for each block, and lay it during the concrete pouring process according to the position of the cooling water pipes in each layer. The pile cap erection bars (43) and temperature measuring elements (42) are arranged in the pile cap. The vertical fixing bars (38) and horizontal fixing bars (41) for the cooling pipes are fixed on the pile cap erection bars (43), and the cooling pipes (39) are arranged and fixed on the vertical fixing bars (38) and horizontal fixing bars (41) for the cooling pipes. The water inlet (40) and water outlet (44) are arranged at both ends of the cooling pipe (39). After the cooling pipe (39) is installed and fixed, the pipeline is filled with water, and the water inlet (40) and water outlet (44) are blocked. Then, when the pile cap starts to be poured, the cooling pipe (39) is filled with water.

4. The construction method of the special-shaped bearing platform according to claim 1, characterized in that, In Step 4, monitor the temperature field change inside the mass concrete through the temperature measuring element (42). When the temperature difference between the highest temperature inside the concrete and the lowest ambient temperature at that time is less than or equal to 20°C, stop passing cooling water; after the concrete is poured, carry out covering and sprinkler curing.

5. The construction method of the special-shaped bearing platform according to claim 1, characterized in that, In Step 5, the in-situ binding auxiliary jig for the inclined springing bars includes a steel section fixed base (21), a steel section fixed groove (22), a vertical steel section (23), a horizontal steel section (24), a horizontal positioning bar (25), an inclined positioning steel bar (26), and a vertical positioning bar (27). The steel section fixed base (21) is fixed on the pile cap, the steel section fixed groove (22) is arranged in the steel section fixed base (21), the vertical steel section (23) is fixed on the steel section fixed groove (22), the horizontal steel section (24) connects and fixes two vertical steel sections (23), the vertical positioning bar (27) is fixed on the horizontal steel section (24), the inclined positioning steel bar (26) is connected to the vertical positioning bar (27), and the horizontal positioning bar (25) is fixed on the vertical positioning bar (27).

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