Double-column double-layer double-cantilever assembly type elevated station structure and combination method thereof

Abstract

The invention relates to a double-column double-layer double-overhanging assembly type elevated station structure and a combination method thereof.The elevated station structure comprises two pier columns, a station hall layer overhanging cover beam, two stand columns, a platform plate lower layer overhanging cover beam, platform layer pier columns and platform prefabricated beams; the two station hall layer cantilever cover beams which are in mirror image with each other are connected through a first node and are supported on the pier columns; the stand columns are aligned with the pier columns and supported on a cantilever cover beam of a station hall layer. The two platform plate lower-layer overhanging cover beams which are in mirror image with each other are connected through a second node and are supported on the stand columns; the platform layer pier columns are supported on the platform plate lower layer overhanging cover beam. The platform prefabricated beam is supported on the platform layer pier columns, and the burden of the overhanging cover beam of the station hall layer is reduced in a double-layer overhanging mode. The problems that an existing elevated station structure is poor in safety redundancy, large in component dead weight and poor in maintainability are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of rail transit engineering, and in particular relates to a double-column double-layer double-cantilever assembled elevated station structure and an assembly method thereof. Background Art

[0002] As the mainstream structural form of urban rail transit, the bridge-building integrated double-column and double-cantilever elevated station achieves the goal of flexible building layout and saving urban space through cast-in-place construction. Figure 1 As shown in the figure, its typical structure is to set up double columns on the first floor in the green belt in the middle of the road, and set up double cantilever cap beams on the station hall level to bear the loads of the station hall level, the lower platform level, the canopy and the auxiliary facilities. In the existing technology, the cantilever cap beam is used as the core force transmission component, which transmits the upper multi-layer load to the far end of the cantilever through the side columns, and relies on a single cantilever structure to achieve large-span space expansion.

[0003] However, this structure has significant defects in prefabricated applications: first, poor safety redundancy. As a single load-bearing component, the cantilever cap beam’s root design directly determines the overall safety. Once cracks or deformation occur, it will endanger the entire station. Second, the cantilever cap beam has a large cross-sectional size and heavy weight due to the concentrated load, making it difficult to construct and hoist. Third, Figure 2 As shown in the figure, the canopy column base is set at the edge of the platform, resulting in complex platform node structure and concentrated load, which is contrary to the requirements of prefabricated modular design. In addition, the cast-in-place structure does not consider the decoupling combination of components, making it difficult to meet the requirements of prefabricated construction for node stiffness and seismic performance, which seriously restricts the industrial application of this structural system. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a double-column, double-layer, double-cantilevered assembled elevated station structure and an assembly method thereof, which solves the problems of poor safety redundancy, heavy component weight, and poor maintainability of the existing elevated station structure.

[0005] To achieve the above object, the technical solution of the present invention is as follows:

[0006] A double-column, double-deck, double-cantilevered assembled elevated station structure comprises two piers, a cantilevered cap beam of a station hall layer, two uprights, a cantilevered cap beam of a lower layer of a platform slab, platform layer piers and platform precast beams, wherein the piers are respectively supported on foundations, and the two cantilevered cap beams of the station hall layer, which are mirror images of each other, are connected through a first node and are supported on the piers; the uprights are aligned with the piers and are supported on the cantilevered cap beams of the station hall layer; the two cantilevered cap beams of the lower layer of the platform slab, which are mirror images of each other, are connected through a second node and are supported on the uprights; the platform layer piers are supported on the cantilevered cap beams of the lower layer of the platform slab; the platform precast beams are supported on the platform layer piers, and the burden of the cantilevered cap beams of the station hall layer is reduced by a double-deck cantilever method.

[0007] Preferably, it also includes a canopy, and the column foot node of the canopy is located at the cantilevered end of the cantilevered cap beam of the lower layer of the platform slab.

[0008] Preferably, the piers, the cantilevered cap beams of the station hall layer, the columns and the cantilevered cap beams of the lower layer of the platform slab are four types of eight prefabricated components, which together constitute the main frame structure.

[0009] Preferably, it also includes upper and lower longitudinal prefabricated composite frame beams, wherein both ends of the upper longitudinal prefabricated composite frame beams are fixed to the connection between the prefabricated station hall layer cantilever cap beams and the piers of the main frame, and both ends of the lower longitudinal prefabricated composite frame beams are fixed to the connection between the prefabricated platform slab lower layer cantilever cap beams and the columns of the main frame.

[0010] Preferably, the piers and foundations are arranged in a green belt in the middle of the road.

[0011] On the other hand, the present invention also discloses a method for assembling a double-column, double-layer, double-cantilevered assembled elevated station structure, which is characterized by comprising the following steps:

[0012] S1, install the two prefabricated piers on the first floor symmetrically on the foundation;

[0013] S2: Two cantilever cap beams for the concourse level are hoisted symmetrically on top of the piers on the first floor, and the first post-casting area is reserved at the joint between the two.

[0014] S3, connecting steel bars in the post-casting area and pouring concrete to complete consolidation of the first node;

[0015] S4, symmetrically install two prefabricated columns on the second floor on the cantilevered cap beam of the station hall;

[0016] S5, symmetrically hoist two cantilever cap beams of the lower platform slab on the top of the second-floor columns, and reserve the second post-casting area at the joint point between the two;

[0017] S6, connecting steel bars and pouring concrete in the post-casting area to complete the consolidation of the second node, forming a station load-bearing main frame consisting of eight prefabricated components of four categories.

[0018] Preferably, the method further comprises the following steps:

[0019] S7, install prefabricated platform piers on the cantilevered cap beam of the lower platform slab and fix them with embedded steel connectors.

[0020] Preferably, the method further comprises the following steps:

[0021] S8, install the platform precast beams on the platform level piers.

[0022] Preferably, the method further comprises the following steps:

[0023] S9, a column foot node is installed at the cantilevered end of the cantilevered cap beam of the lower layer of the platform slab, and the canopy is fixed to the cantilevered cap beam of the lower layer of the platform slab through the column foot node.

[0024] Preferably, step S6 also includes: installing the upper layer of the longitudinal prefabricated composite frame beams at the connection between the prefabricated station hall layer cantilever cap beams and the piers of the main frame, and installing the lower layer of the longitudinal prefabricated composite frame beams at the connection between the prefabricated platform slab lower layer cantilever cap beams and the columns of the main frame.

[0025] Compared with the prior art, the advantages of the present invention are:

[0026] The double-column, double-layer, double-cantilevered prefabricated elevated station structure proposed in the present invention adopts a double-layer cantilevered structural system of the station hall layer and the platform layer, and prefabricated components with left-right mirror symmetry and use the first node and the second node to achieve reliable connection, thereby avoiding the disadvantage of a single cantilevered cap beam in the traditional cast-in-place structure bearing multiple layers of loads, thereby significantly improving the safety and redundancy of the structure. At the same time, by adjusting to a double-layer cantilever design and splitting the cantilevered cap beam that runs through the entire width of the station into two prefabricated components, the cross-sectional size and deadweight of the components are greatly reduced, which not only improves the economic efficiency of the structure, but also facilitates prefabricated construction. The canopy column foot node is moved to the cantilevered end of the cantilevered cap beam of the lower layer of the platform slab, which effectively reduces the structural load of the platform layer and simplifies the node structure, realizing the lightweight assembly of the platform layer structure. The use of eight prefabricated components of four categories to form the main load-bearing frame of the elevated station reduces the number of component types, improves the degree of standardization, and makes the installation process clear and simple, thereby further enhancing the overall technical advantages of the prefabricated structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a typical cross-section diagram of an existing double-column and double-cantilever elevated station;

[0028] Figure 2 This is a schematic diagram of the existing canopy column base being set at the edge of the platform structure;

[0029] Figure 3 This is a schematic diagram of the structure of a double-column, double-deck, double-cantilevered assembled elevated station according to an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of an assembled elevated station platform according to an embodiment of the present invention;

[0031] Figure 5 A schematic diagram of an assembly method of a double-column, double-layer, double-cantilevered assembled elevated station structure according to an embodiment of the present invention;

[0032] Figure 6 It is a schematic diagram of the longitudinal installation of a double-column, double-deck, double-cantilevered assembled elevated station structure according to an embodiment of the present invention.

[0033] Explanation of the reference numerals: 1- pier; 2- cantilevered cap beam of the station hall layer; 3- column; 4- cantilevered cap beam of the lower layer of the platform slab; 5- platform layer pier; 6- precast platform beam; 7- first node; 8- second node; 9- canopy; 10- column foot node; 11- platform structure edge; 12- foundation; 13- longitudinal precast composite frame beam. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the present invention.

[0035] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0036] like Figure 3-6As shown, this embodiment discloses a double-column double-layer double-cantilever assembled elevated station structure, including two piers 1, a cantilevered cap beam 2 at the station hall level, two columns 3, a cantilevered cap beam 4 at the lower level of the platform slab, a platform pier 5 and a precast platform beam 6. The piers 1 are supported on the foundation 12 respectively, so that the entire station structure has a stable vertical support capacity and ensures that the load can be effectively transferred to the foundation. Among them, the piers 1 and the foundation 12 are arranged in the green belt in the middle of the road, so that the station structure can make full use of the space resources in the center of the road and reduce the impact on the surrounding traffic. The two cantilevered cap beams 2 at the station hall level, which are mirror images of each other, are connected by a first node 7 and supported on the pier 1. The first node 7 provides a reliable connection, so that the cantilevered cap beam 2 at the station hall level can maintain integrity when subjected to force, thereby improving the structural stability. Column 3 is aligned with pier 1 and supported on the cantilever cap beam 2 of the station hall. Column 3 plays the role of vertical force transmission, ensuring that the load of the cantilever cap beam 4 of the lower platform slab can be reasonably transferred to the cantilever cap beam 2 of the station hall slab to avoid excessive force on a single component. The two mirrored lower platform slab cantilever cap beams 4 are connected by the second node 8 and supported on column 3. The setting of the second node 8 ensures the splicing strength of the lower platform slab cantilever cap beam 4 and facilitates construction and installation. The platform pier 5 is supported on the lower platform slab cantilever cap beam 4, so that the platform structure has independent support capabilities and reduces the force on the cantilever cap beam 2 of the station hall slab. The platform precast beam 6 is supported on the platform pier 5, providing a load-bearing foundation for the platform layer and ensuring the stability of the platform panel. Through the double-layer cantilever method, the burden of the cantilever cap beam 2 of the station hall layer is reduced, the load can be reasonably distributed among different structural layers, the safety redundancy of the overall structure is improved, and at the same time the component size is optimized, the construction difficulty is reduced, and the efficiency of prefabricated construction is improved.

[0037] Furthermore, it also includes a canopy 9, the column foot node 10 of the canopy 9 is located at the cantilevered end of the cantilevered cap beam 4 of the lower layer of the platform slab, so that the load of the canopy 9 is borne by the cantilevered cap beam 4 of the lower layer of the platform slab, thereby avoiding the load of the canopy 9 being directly applied to the edge 11 of the platform structure, reducing the structural burden of the platform layer, and at the same time optimizing the stress condition of the overall structure of the station, and improving the wind resistance and stability of the canopy 9.

[0038] The pier 1, the cantilever cap beam 2 of the station hall layer, the column 3 and the cantilever cap beam 4 of the lower layer of the platform slab in this embodiment are four types of eight prefabricated components, which together constitute the main frame structure. The four types of components are prefabricated in a standardized manner, which not only ensures the overall stability of the structure, but also improves the assembly efficiency of the construction, making the on-site construction faster and helping to shorten the construction period.

[0039] The double-column, double-deck, double-cantilevered assembled elevated station structure also includes upper and lower longitudinal prefabricated composite frame beams 13. The two ends of the upper longitudinal prefabricated composite frame beams 13 are fixed to the connection between the prefabricated station hall cantilever cap beam 2 and the pier 1 of the main frame, and the two ends of the lower longitudinal prefabricated composite frame beams 13 are fixed to the connection between the prefabricated platform slab lower cantilever cap beam 4 and the column 3 of the main frame. The setting of the longitudinal prefabricated composite frame beams 13 further enhances the overall rigidity of the station structure, improves the station's anti-deformation ability in the longitudinal direction, and optimizes the force path of the station structure, so that it has better stability during long-term use.

[0040] Figure 3 The structural system shown will Figure 1 The single-layer cantilever of the station hall layer in the existing scheme shown is improved to a double-layer cantilever of the station hall layer and the lower layer of the platform slab, which greatly reduces the burden of the cantilever cap beam of the station hall layer, significantly reduces the deadweight of the components, and improves the structural safety redundancy. In the existing scheme, the cantilever cap beam of the station hall layer needs to bear all the loads of the station hall layer and the platform layer, resulting in large cross-sectional dimensions and heavy deadweight of the components, affecting the construction efficiency and structural economy. Based on typical engineering cases, the deadweight of the main frame under the two schemes is statistically analyzed, see Table 1.

[0041] Table 1 Main frame deadweight comparison table

[0042]

[0043] It can be seen from Table 1 that the self-weight of the main frame is significantly reduced after the transformation, with a reduction of 16.35%. Among them, the self-weight of the cantilevered cap beam 2 on the station hall level is reduced by 46.19%. The self-weight of the cap beam is slightly increased due to the adjustment of the force system, but the overall structure is more evenly stressed, avoiding the situation where a single component is subjected to excessive load. In addition, the side columns are completely eliminated, which makes the overall component layout more optimized, further reduces unnecessary structural usage, and improves the structural economy. Through the above-mentioned optimized design, the present invention not only improves the safety redundancy of the structure, but also effectively reduces the material usage, optimizes the weight distribution of components, makes prefabricated construction more feasible, and has significant engineering application value.

[0044] Another embodiment of the present invention further discloses a method for assembling the above-mentioned double-column, double-layer, double-cantilevered assembled elevated station structure, comprising the following steps:

[0045] S1, symmetrically install the two prefabricated piers 1 on the first floor on the foundation 12;

[0046] This step makes pier 1 a vertical load-bearing member of the station, ensuring that the entire station structure has a stable supporting capacity and providing a reliable fulcrum for the subsequent installation of the cantilever cap beam.

[0047] S2, symmetrically hoist two cantilever cap beams 2 of the station hall on the top of the pier 1 of the first floor, and reserve the first post-casting area at the joint point between the two;

[0048] This step enables the cantilever cap beam 2 of the station hall layer to form an integral connection through the first post-casting area, avoiding a single component from bearing all the loads, improving the stability of the structure, and facilitating subsequent steel bar connection and concrete pouring construction.

[0049] S3, connecting steel bars in the post-casting area and pouring concrete to complete the consolidation of the first node 7;

[0050] This step enables the cantilever cap beam 2 of the station hall layer to form a stable connection with the pier 1 through the first node 7, ensuring the bearing capacity, and enables the cap beam to effectively disperse and transfer the upper structure load, thereby improving the reliability of the cantilever structure.

[0051] S4, symmetrically install two prefabricated columns 3 on the second floor on the cantilever cap beam 2 of the station hall layer;

[0052] This step enables the columns 3 to serve as the load-bearing components of the platform layer, providing support for the installation of the cantilevered cap beam 4 of the lower layer of the platform slab, while ensuring that the vertical force transmission path of the structure is stable and reliable.

[0053] S5, symmetrically hoist two platform slab lower cantilever cap beams 4 on the top of the second-floor columns 3, and reserve a second post-casting area at the joint between the two;

[0054] This step enables the cantilevered cap beam 4 of the lower layer of the platform slab to form an integral connection through the second post-casting area, thereby optimizing the structural stress, improving the bending stiffness of the cantilevered cap beam 4 of the lower layer of the platform slab, and facilitating subsequent construction operations.

[0055] S6, connecting steel bars and pouring concrete in the post-casting area to complete the consolidation of the second node 8, forming a station load-bearing main frame consisting of eight prefabricated components of four categories;

[0056] This step enables the cantilever cap beam 4 of the lower layer of the platform slab to form a stable force system with the column 3 through the consolidation of the second node 8, thereby improving the safety and durability of the structure and ensuring that the station structure has good bearing capacity and seismic performance during long-term use. Step S6 also includes installing the upper layer of longitudinal prefabricated composite frame beams 13 at the connection between the prefabricated cantilever cap beam 2 of the station hall layer of the main frame and the pier 1, and installing the lower layer of longitudinal prefabricated composite frame beams 13 at the connection between the prefabricated cantilever cap beam 4 of the lower layer of the platform slab of the main frame and the column 3.

[0057] Furthermore, the combination method further comprises the following steps:

[0058] S7, installing the prefabricated platform pier 5 on the cantilever cap beam 4 of the lower layer of the platform slab, and fixing it with embedded steel bar connectors;

[0059] This step enables the platform layer pier 5 to be reliably fixed on the cantilevered cap beam 4 of the lower layer of the platform slab, thereby ensuring the stability of the platform layer structure and forming a complete load-bearing system in the vertical direction. At the same time, the use of embedded steel bar connectors improves the connection strength and enhances the shear and bending resistance of the structure.

[0060] S8, installing the platform precast beam 6 on the platform layer pier 5;

[0061] This step enables the platform precast beam 6 to serve as a load-bearing component of the platform layer, ensuring stable support for the installation of the platform panel, while optimizing the overall stress condition of the platform layer structure and improving construction accuracy and assembly efficiency.

[0062] S9, a column foot node 10 is installed at the cantilevered end of the cantilever cap beam 4 of the lower layer of the platform slab, and the canopy 9 is fixed to the cantilever cap beam 4 of the lower layer of the platform slab through the column foot node 10;

[0063] This step enables the load of the canopy 9 to be borne by the cantilevered cap beam 4 of the lower layer of the platform slab, avoiding the load acting directly on the edge 11 of the platform structure, thereby reducing the structural burden of the platform layer. At the same time, the setting of the column base node 10 improves the wind resistance and stability of the canopy 9 and enhances the durability of the overall structure.

[0064] In this step, the provision of the longitudinal prefabricated composite frame beams 13 enhances the overall stiffness of the station structure in the longitudinal direction, so that the structure has better stability and deformation resistance under the longitudinal load, while optimizing the force path of the structure and improving the long-term safety and durability of the station structure.

[0065] In summary, the present invention discloses a double-column double-layer double-cantilever assembled elevated station structure and its assembly method, the structure includes piers 1, cantilever cap beams 2 of the station hall layer, columns 3, cantilever cap beams 4 of the lower layer of the platform slab, piers 5 of the platform layer and precast platform beams 6, and the standardized and modular assembly of the elevated station is achieved by adopting a double-layer cantilever structural system, precast components with left-right mirror symmetry, and a connection method of the first node 7 and the second node 8. The assembly method of the present invention sequentially installs the piers 1, cantilever cap beams 2 of the station hall layer, columns 3, cantilever cap beams 4 of the lower layer of the platform slab, piers 5 of the platform layer and precast platform beams 6, and reserves post-casting areas at key connection locations for steel bar connection and concrete pouring, thereby ensuring the integrity of the structure and construction operability, and at the same time, arranging longitudinal precast composite frame beams 13 to enhance the overall rigidity and deformation resistance of the structure.

[0066] The present invention avoids the problem of traditional cast-in-place structures relying on a single component to bear multiple layers of loads through the optimized design of the double-layer cantilever structure system, improves the safety redundancy of the structure, and significantly reduces the deadweight of the component by reducing the force on the single cantilever cap beam, thereby optimizing the force path of the structure. At the same time, eight prefabricated components of four categories are used as the main bearing frame of the station, which improves the degree of standardization, simplifies the installation steps, makes the assembly process clearer and simpler, and improves construction efficiency and project quality. The present invention also optimizes the platform layer structure by arranging the column foot node 10 of the canopy 9 at the cantilevered end of the cantilever cap beam 4 of the lower layer of the platform slab, thereby reducing the force on the platform layer, further realizing the lightweight design of the platform layer, and enhancing the economy and safety of the overall structure of the station.

[0067] The present invention has broad application prospects in the field of urban rail transit elevated stations. The proposed double-column, double-layer, double-cantilevered prefabricated structural scheme not only inherits the advantages of the flexible architectural layout and less urban space occupied by the bridge-building integrated double-column, double-cantilevered elevated station, but also breaks through the technical difficulties of the traditional cast-in-place structure, such as low safety redundancy, heavy weight, and complex construction. Based on the wide application needs of the existing market, the prefabricated structural system of the present invention has a high market fit and is easy for engineering and technical personnel to accept and promote. In addition, the structure of the present invention has low deadweight, few component types, and a high degree of standardization, which can greatly reduce the workload on the construction site, reduce carbon emissions, shorten the construction period, improve the economic efficiency of the project, and provide a better investment plan for the construction unit. Comparative calculations of classic structures show that the structural system proposed by the present invention can achieve a weight reduction effect of 16.35%, which improves the feasibility of prefabricated construction while reducing material costs, and has good social and economic benefits.

[0068] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Although the present invention has been described in detail with reference to the above embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the above embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A double-column, double-layer, double-cantilevered assembled elevated station structure, characterized in that: The invention comprises two piers (1), a cantilevered cap beam (2) of the station hall, two columns (3), a cantilevered cap beam (4) of the lower layer of the platform slab, a pier column (5) of the platform and a precast beam (6) of the platform. The pier columns (1) are respectively supported on the foundation (12). The two cantilevered cap beams (2) of the station hall layer, which are mirror images of each other, are connected through a first node (7) and supported on the pier columns (1); the columns (3) are aligned with the pier columns (1) and supported on the cantilevered cap beam (2) of the station hall layer; the two cantilevered cap beams (4) of the lower layer of the platform slab, which are mirror images of each other, are connected through a second node (8) and supported on the columns (3); the pier columns (5) of the platform layer are supported on the cantilevered cap beam (4) of the lower layer of the platform slab; the precast beam (6) of the platform is supported on the pier columns (5) of the platform layer. By means of a double-layer cantilevering method, the burden of the cantilevered cap beam (2) of the station hall layer is reduced.

2. The double-column, double-layer, double-cantilevered assembled elevated station structure according to claim 1 is characterized in that: It also includes a canopy (9), wherein a column foot node (10) of the canopy (9) is located at the cantilevered end of the cantilevered cap beam (4) of the lower layer of the platform slab.

3. The double-column, double-layer, double-cantilevered assembled elevated station structure according to claim 2 is characterized in that: The pier columns (1), the cantilevered cap beams (2) at the station hall level, the columns (3) and the cantilevered cap beams (4) at the lower level of the platform slab are four types of eight prefabricated components, which together constitute a main frame structure.

4. The double-column, double-layer, double-cantilevered assembled elevated station structure according to claim 3 is characterized in that: It also includes upper and lower longitudinal prefabricated composite frame beams (13), wherein the two ends of the upper longitudinal prefabricated composite frame beam (13) are fixed to the connection between the prefabricated station hall layer cantilever cap beam (2) of the main frame and the pier (1), and the two ends of the lower longitudinal prefabricated composite frame beam (13) are fixed to the connection between the prefabricated platform slab lower layer cantilever cap beam (4) of the main frame and the column (3).

5. The double-column, double-layer, double-cantilevered assembled elevated station structure according to claim 4 is characterized in that: The pier (1) and the foundation (12) are arranged in a green belt in the middle of the road.

6. The method for assembling a double-column, double-layer, double-cantilevered assembled elevated station structure according to claim 5, characterized in that: The following steps are involved: S1, symmetrically install the two prefabricated piers (1) on the first floor on the foundation (12); S2, symmetrically hoist two cantilever cap beams (2) at the concourse level on top of the pier column (1) at the first floor, and reserve a first post-casting area at the joint between the two; S3, connecting steel bars and pouring concrete in the post-casting area to complete the consolidation of the first node (7); S4, symmetrically install two prefabricated columns (3) on the second floor on the cantilever cap beam (2) of the station hall layer; S5, symmetrically hoist two platform slab lower cantilever cap beams (4) on the top of the second-floor columns (3), and reserve a second post-casting area at the joint between the two; S6, connecting steel bars and pouring concrete in the post-casting area to complete the consolidation of the second node (8), forming a station load-bearing main frame composed of eight prefabricated components of four types.

7. The method for assembling a double-column, double-layer, double-cantilevered assembled elevated station structure according to claim 6, characterized in that: The following steps are also included: S7, installing the prefabricated platform pier column (5) on the cantilevered cap beam (4) of the lower layer of the platform slab, and fixing it with embedded steel bar connectors.

8. The method for assembling a double-column, double-layer, double-cantilevered assembled elevated station structure according to claim 7, characterized in that: The following steps are also included: S8, installing the platform prefabricated beam (6) on the platform layer pier (5).

9. The method for assembling a double-column, double-layer, double-cantilevered assembled elevated station structure according to claim 8, characterized in that: The following steps are also included: S9, a column foot node (10) is installed at the cantilevered end of the cantilevered cap beam (4) of the lower layer of the platform slab, and the canopy (9) is fixed to the cantilevered cap beam (4) of the lower layer of the platform slab through the column foot node (10).

10. The method for assembling a double-column, double-layer, double-cantilevered assembled elevated station structure according to claim 5, characterized in that: The step S6 also includes: installing the upper layer of the longitudinal prefabricated composite frame beam (13) at the connection between the prefabricated station hall layer cantilever cap beam (2) of the main frame and the pier (1), and installing the lower layer of the longitudinal prefabricated composite frame beam (13) at the connection between the prefabricated platform slab lower layer cantilever cap beam (4) of the main frame and the column (3).

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