Operating station platform plate reconstruction structure and construction method

Abstract

The application discloses an operating station platform plate reconstruction structure and a construction method, and belongs to the technical field of railway station platform plate reconstruction.

Description

Technical Field

[0001] This invention belongs to the field of underground engineering technology, specifically relating to a modified platform slab structure and construction method for an operating station. Background Technology

[0002] As urban rail transit lines age, some older stations need to adapt to adjustments in platform boundaries due to new lines or changes in train models. One typical requirement is the widening or extension of platform slabs. Existing renovation methods often involve cast-in-place expansion or partial demolition and reconstruction, which typically require long periods of closed construction and the deployment of large quantities of machinery. This makes it difficult to organize construction during nighttime skylights under operating conditions and can easily impact passenger flow, existing interior decoration, and electromechanical pipelines.

[0003] Therefore, there is an urgent need for a platform slab renovation structure and construction method that is suitable for operating stations, can be quickly implemented during maintenance windows, has minimal impact on operations, and is easy to organize. Summary of the Invention

[0004] This invention is proposed to solve the problems existing in the prior art, and its purpose is to provide a structural modification method and construction method for the platform slab of an operating station.

[0005] The technical solution of the present invention is: a platform slab renovation structure for an operating station, including a structural base plate, precast concrete columns installed on the structural base plate, a precast concrete slab installed on the top of the precast concrete columns, and the top of the precast concrete columns supporting the existing platform slab structure, wherein the existing platform slab structure and the precast concrete slab are connected.

[0006] Furthermore, an installation platform is formed at the bottom of the precast concrete column, the cross-section of which is larger than the cross-section of the precast concrete column, and the lower end face of the installation platform is in contact with the surface of the structural base plate.

[0007] Furthermore, a through hole is formed in the precast concrete column, and bolts are passed through the through hole to fix it to the structural base plate.

[0008] Furthermore, a support section is formed on the upper part of the precast concrete column, the cross-section of which is larger than that of the lower part of the precast concrete column, and the two gradually transition between each other.

[0009] Furthermore, an upper through hole is formed in the precast concrete slab, and bolts are passed through the upper through hole to fix it to the precast concrete column.

[0010] Furthermore, the top of the increased cross-section support the precast concrete slab and the existing platform slab structure.

[0011] Furthermore, the precast concrete column includes a precast corbel section at the top, a precast column base section at the bottom, and a precast straight section connecting the two, the length of which is adapted to platform slab structures of different heights.

[0012] Furthermore, the precast concrete slab is a lightweight, high-strength precast hollow UHPC concrete slab, which improves construction efficiency.

[0013] A construction method for modifying the structure of a station platform slab includes the following steps: A. Design and prefabricate precast concrete columns and slabs in sections, and carry out construction protection for the remodeling and assembly areas; B. Transport the precast concrete columns and precast concrete slabs to the renovation and assembly area; C. Connect the precast concrete columns to the structural base slab; D. Assemble precast concrete slabs and connect them to precast concrete columns; E. Insert wedge-shaped pads into the joint between the existing platform slab structure and the precast concrete column and tighten them to complete the force transfer.

[0014] The beneficial effects of this invention are as follows: This invention is adapted to construction under operational conditions, and adopts a manual assembly method for prefabricated components within the station. It can be implemented during nighttime maintenance windows, reducing the impact on passenger organization and station operations.

[0015] This invention features high assembly efficiency, with both precast concrete columns and precast concrete slabs connected by bolts. The construction process is clear and the nodes are controllable, facilitating rapid assembly and quality acceptance.

[0016] This invention facilitates force transfer by using wedge-shaped pads to seal the joints, enabling coordinated force transmission between the old and new systems without large-scale demolition of the existing platform structure.

[0017] This invention can be adapted to existing structural conditions. The height of the precast concrete columns can be flexibly adjusted to suit the height of platform slabs in different situations. It can also be modified in combination with existing deflection to reduce the risk of assembly conflicts and improve construction feasibility.

[0018] This invention offers superior stability. The precast concrete column base is asymmetrically widened, and a corbel is installed at the top of the column, which helps improve the column's stability and the load transfer performance between the old and new structures. Attached Figure Description

[0019] Figure 1 This is a structural cross-sectional view of the present invention; Figure 2 This is a structural plan view of the present invention; Figure 3This is a schematic diagram of the precast concrete column in this invention; Figure 4 This is a schematic diagram of the precast hollow UHPC concrete slab in this invention; The components include: 1. Existing platform slab structure; 2. Structural base slab; 3. Precast concrete columns; 4. Precast concrete slabs; 5. Bolts; 6. Joints; 7. Precast column base sections; 8. Precast corbel sections; 9. Precast straight sections; and 10. Precast hollow UHPC concrete slabs. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments: like Figures 1 to 4 As shown, a modified platform slab structure for an operating station includes a structural base slab 2, on which precast concrete columns 3 are installed, and on top of the precast concrete columns 3, a precast concrete slab 4 is installed, with the top of the precast concrete columns 3 supporting the existing platform slab structure 1, and the existing platform slab structure 1 and the precast concrete slab 4 are connected.

[0021] The bottom of the precast concrete column 3 forms an installation platform, the cross-section of which is larger than the cross-section of the precast concrete column 3, and the lower end face of the installation platform is in contact with the surface of the structural base plate 2.

[0022] A through hole is formed in the precast concrete column 3, and bolts 5 are passed through the through hole and fixed to the structural base plate 2.

[0023] The upper part of the precast concrete column 3 forms a support section, the cross-section of which is larger than that of the lower part of the precast concrete column 3, and the two gradually transition.

[0024] A through hole is formed in the precast concrete slab 4, and the bolt 5 passes through the through hole and is fixed to the precast concrete column 3.

[0025] The top of the increased cross-section of the connecting section supports the precast concrete slab 4 and the existing platform slab structure 1.

[0026] Specifically, the precast concrete column 3 is detachably connected to the structural base plate 2 by bolts 5.

[0027] Similarly, the precast concrete slab 4 is detachably connected to the precast concrete column 3 by bolts 5.

[0028] A joint 6 is formed between the existing platform slab structure 1 and the precast concrete column 3. A wedge-shaped pad is placed in the joint 6 and tightened to complete the force transfer between the precast concrete column 3 and the existing platform slab structure 1.

[0029] More specifically, the wedge-shaped pad meets the durability requirements and can maintain a tight seal and force transmission performance for a long time in the station operating environment.

[0030] Specifically, the height of the precast concrete column 3 is determined by taking into account the existing deflection of the existing platform slab structure 1 during manufacturing, so as to avoid structural conflicts during assembly.

[0031] Specifically, the precast concrete column 3 and precast concrete slab 4 are one of ordinary precast concrete components, high-performance precast concrete components, and ultra-high-performance precast concrete components. The precast concrete column 3 and precast concrete slab 4 reduce the size of the components and are suitable for manual handling and assembly within the station.

[0032] Specifically, the length of the column base of the precast concrete column 3 on the side connected by the bolt 5 is greater than the length of the other three sides, so as to increase the pressure area of ​​the column base and improve stability.

[0033] Specifically, the top of the precast concrete column 3 is provided with a corbel on the side close to the existing platform slab structure 1 to facilitate the transfer of stress between the old and new structures.

[0034] Specifically, the precast concrete column 3 includes a precast corbel section 8 at the top, a precast column base section 7 at the bottom, and a precast straight section 9 connecting the two. The length of the precast straight section 9 is adapted to platform slab structures of different heights.

[0035] The cross-sectional areas of the prefabricated corbel section 8 and the prefabricated column base section 7 are both larger than those of the prefabricated straight section 9, and the prefabricated corbel section 8, the prefabricated column base section 7, and the prefabricated straight section 9 are an integral structure.

[0036] The top of the prefabricated corbel section 8 and the bottom of the prefabricated column base section 7 form prefabricated holes for assembly.

[0037] Specifically, the precast concrete slab 4 is a lightweight, high-strength precast hollow UHPC concrete slab 10, which improves construction efficiency.

[0038] The top and bottom of the precast hollow UHPC concrete slab 10 have aligned assembly holes.

[0039] A construction method for modifying the structure of a station platform slab includes the following steps: A. Design and prefabricate precast concrete columns 3 and precast concrete slabs 4 in sections, and carry out construction protection for the remodeling and assembly areas; B. Transport the precast concrete column 3 and precast concrete slab 4 to the renovation and assembly area; C. Connect the precast concrete column 3 to the structural base slab 2; D. Assemble the precast concrete slab 4 and connect it to the precast concrete column 3; E. Insert wedge-shaped pads into the joint 6 between the existing platform slab structure 1 and the precast concrete column 3 and tighten them to complete the force transfer.

[0040] Specifically, step A involves the segmented design and prefabrication of precast concrete columns 3 and precast concrete slabs 4, and the construction protection of the modification and assembly area. The specific process is as follows: First, construction preparations were carried out, and the precast concrete column 3 and precast concrete slab 4 were designed and precast in sections according to the design requirements and structural stress calculations. Then, construction protection measures were implemented for the modified assembly area.

[0041] Specifically, step B involves transporting the precast concrete columns 3 and precast concrete slabs 4 to the renovation and assembly area. The specific process is as follows: During the station's maintenance window, the precast concrete columns 3 and precast concrete slabs 4 from step A will be transported to the renovation and assembly area.

[0042] Specifically, step C connects the precast concrete column 3 to the structural base slab 2, and the specific process is as follows: First, install the precast concrete column 3 at the designed location; Then, the precast concrete column 3 is tightened to the structural base plate 2 using bolts 5.

[0043] Specifically, step D involves assembling the precast concrete slab 4 and connecting it to the precast concrete column 3. The specific process is as follows: First, precast concrete slabs 4 are assembled on the precast concrete column 3; Then, the precast concrete slab 4 is tightened to the precast concrete column 3 using bolts 5.

[0044] To avoid assembly conflicts, the height of the precast concrete column 3 is modified during the precast stage taking into account the existing deflection of the existing platform slab structure 1.

[0045] Meanwhile, the column base of the precast concrete column 3 is lengthened on the bolted connection side and relatively shorter on the other three sides to increase the pressure-bearing area of ​​the column base and improve stability.

[0046] Meanwhile, the top of the precast concrete column 3 is fitted with a corbel on the side close to the existing platform slab structure 1 to facilitate the transfer and conversion of forces.

[0047] This invention is adapted to construction under operational conditions, and adopts a manual assembly method for prefabricated components within the station. It can be implemented during nighttime maintenance windows, reducing the impact on passenger organization and station operations.

[0048] This invention features high assembly efficiency, with both precast concrete columns and precast concrete slabs connected by bolts. The construction process is clear and the nodes are controllable, facilitating rapid assembly and quality acceptance.

[0049] This invention facilitates force transfer by using wedge-shaped pads to seal the joints, enabling coordinated force transmission between the old and new systems without large-scale demolition of the existing platform structure.

[0050] This invention can be adapted to existing structural conditions. The height of the precast concrete columns can be flexibly adjusted to suit the height of platform slabs in different situations. It can also be modified in combination with existing deflection to reduce the risk of assembly conflicts and improve construction feasibility.

[0051] This invention offers superior stability. The precast concrete column base is asymmetrically widened, and a corbel is installed at the top of the column, which helps improve the column's stability and the load transfer performance between the old and new structures.

Claims

1. A platform slab modification structure for an operating station, comprising a structural base plate (2), characterized in that: A precast concrete column (3) is installed on the structural base plate (2), and a precast concrete slab (4) is installed on the top of the precast concrete column (3). The top of the precast concrete column (3) supports the existing platform slab structure (1). The existing platform slab structure (1) and the precast concrete slab (4) are connected.

2. The platform modification structure for an operating station according to claim 1, characterized in that: The bottom of the precast concrete column (3) forms an installation platform. The cross-section of the installation platform is larger than the cross-section of the precast concrete column (3). The lower end face of the installation platform is in contact with the surface of the structural base plate (2).

3. The station platform modification structure according to claim 2, characterized in that: A through hole is formed in the precast concrete column (3), and a bolt (5) passes through the through hole and is fixed to the structural base plate (2).

4. The station platform modification structure according to claim 1, characterized in that: The upper part of the precast concrete column (3) forms a support section, the cross-section of which is larger than that of the lower part of the precast concrete column (3), and the two gradually transition.

5. The station platform modification structure according to claim 4, characterized in that: An upper through hole is formed in the precast concrete slab (4), and a bolt (5) passes through the upper through hole and is fixed to the precast concrete column (3).

6. The station platform modification structure according to claim 4, characterized in that: The top of the increased cross-section of the connecting section supports the precast concrete slab (4) and the existing platform slab structure (1).

7. The platform modification structure for an operating station according to claim 1, characterized in that: The precast concrete column (3) includes a precast corbel section (8) at the top, a precast column base section (7) at the bottom, and a precast straight section (9) connecting the two. The length of the precast straight section (9) is adapted to the platform slab structure of different heights.

8. The platform modification structure for an operating station according to claim 1, characterized in that: The precast concrete slab (4) is a lightweight, high-strength precast hollow UHPC concrete slab (10), which improves construction efficiency.

9. The construction method for the renovation structure of a station platform slab in operation according to claim 1, characterized in that: Includes the following steps: A. Design and prefabricate precast concrete columns (3) and precast concrete slabs (4) in sections, and carry out construction protection for the remodeling and assembly area; B. Transport the precast concrete columns (3) and precast concrete slabs (4) to the renovation and assembly area; C. Connect the precast concrete column (3) to the structural base plate (2); D. Assemble the precast concrete slabs (4) and connect them to the precast concrete columns (3); E. Insert wedge-shaped pads into the joint (6) between the existing platform slab structure (1) and the precast concrete column (3) and tighten them to complete the force conversion.

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