A vibration isolation and waterproof structure for a basement of an elevated station of urban rail transit

Abstract

This utility model relates to the field of rail transit station renovation technology, and in particular to a vibration isolation and waterproof structure for the renovation of the basement of an elevated urban rail transit station. A construction joint is left between the opening and the newly constructed bridge abutment. The vibration isolation and waterproof structure is installed within this construction joint. The structure includes a vibration isolation and waterproof rubber seal. Both sides of the rubber seal are bonded to the inner wall of the opening and the outer wall of the newly constructed bridge abutment respectively using epoxy adhesive. The interior of the rubber seal has several cavities extending from the opening towards the newly constructed bridge abutment. The advantages of this utility model include: protection of both the old and new structures, preventing further cracking at the structural joint; good waterproof performance, ensuring waterproofing effectiveness; simple and reasonable structure, convenient installation and replaceability, suitable for widespread application.

Description

Technical Field

[0001] This utility model relates to the field of rail transit station renovation technology, and in particular to a vibration isolation and waterproof structure for the renovation of the basement of an elevated urban rail transit station. Background Technology

[0002] Due to the addition of a new rail transit line within an existing station, new bridge piers need to be added within the existing elevated station, and new bridge pier foundations need to be added within the existing basement. The superstructure of the bridge is completely separate from the station structure, and the foundation portion, acting as a fixed end, can be connected without affecting the calculation assumption of "bridge separation." Furthermore, casting the foundations together in place will benefit the waterproofing of the basement. However, during later operation, the bridge structure will bear vehicle loads, and the unevenness of the track will cause vehicle vibrations. These vibrations will then be transmitted to the bridge piers and foundations. If the station foundation is cast-in-place and connected to the bridge pier foundations, the structural joints between the old and new structures will inevitably crack due to long-term vibrations, thus affecting the waterproofing effect. Summary of the Invention

[0003] The purpose of this utility model is to address the shortcomings of the existing technology by providing a vibration isolation and waterproof structure for the renovation of the basement of an elevated urban rail transit station. By setting vibration isolation and waterproof measures between the old and new structures, the safety and waterproofing effect of the structure are effectively ensured.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A vibration isolation and waterproof structure for the renovation of the basement of an elevated urban rail transit station is characterized by: a newly constructed bridge pier and a newly constructed bridge abutment, wherein the newly constructed bridge pier is positioned above the newly constructed bridge abutment, the newly constructed bridge abutment passes through the existing basement floor slab, the newly constructed bridge pier passes through the existing basement roof slab, the existing basement floor slab is chiseled to create holes matching the newly constructed bridge abutment, a certain construction joint is left between the holes and the newly constructed bridge abutment, the vibration isolation and waterproof structure is disposed within this construction joint, the vibration isolation and waterproof structure includes a vibration isolation and waterproof rubber seal, the two sides of the vibration isolation and waterproof rubber seal are respectively bonded to the inner wall of the holes and the outer wall of the newly constructed bridge abutment using epoxy adhesive, and the interior of the vibration isolation and waterproof rubber seal has several cavities extending from the holes towards one side of the newly constructed bridge abutment.

[0006] The waterproof rubber seal is a seal made of polymer inorganic water-absorbing and swelling material and modified rubber.

[0007] The waterproof rubber seal is arranged around the perimeter of the newly constructed bridge abutment.

[0008] The width of the waterproof rubber seal is greater than the width of the joint in the construction structure.

[0009] The advantages of this utility model include: protecting the old and new structures and preventing further cracking at the structural joints; good waterproof performance, ensuring waterproofing effect; simple and reasonable structure, easy installation and replaceability, making it suitable for widespread application. Attached Figure Description

[0010] Figure 1 This is a plan view of the present invention;

[0011] Figure 2 for Figure 1 Sectional view along the AA direction;

[0012] Figure 3 This is a structural diagram showing the relationship between the old and new structures in this utility model. Detailed Implementation

[0013] The features and other related features of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate the understanding of those skilled in the art:

[0014] like Figure 1-3 As shown in the figure, 1-11 represent: 1. New bridge pier, 2. New bridge abutment, 3. Vibration isolation and waterproof structure, 4. Original foundation, 5. Existing basement roof slab, 6. Existing basement floor slab, 7. Removal hole, 8. Vibration isolation and waterproof rubber gasket, 9. Epoxy adhesive, 10. Cavity.

[0015] Example: Figures 1 to 3 As shown in the figure, the vibration isolation and waterproofing structure of the basement renovation of the elevated urban rail transit station in this embodiment is used as a vibration isolation and waterproofing structure between the new bridge structure and the existing basement structure. The new bridge structure mainly includes a new bridge pier 1 and a new bridge abutment 2 located in the existing basement, wherein the new bridge pier 1 is set above the new bridge abutment 2.

[0016] In this embodiment, the existing basement includes an existing basement roof slab 5 and an existing basement floor slab 7. A chisel hole 6 is provided in the existing basement roof slab 5. The size of the chisel hole 6 is slightly larger than the outer contour size of the newly built bridge pier 1. A construction joint is provided between the two to ensure that the newly built bridge pier 1 is separated from the existing basement roof slab 5 and to avoid mutual interference between the two.

[0017] A chisel hole 8 is made in the existing basement floor slab 7. The size of the chisel hole 8 is slightly larger than the outer contour of the new bridge abutment 2, and a construction joint is provided between the two. A vibration isolation and waterproof structure 3 is installed at the location of the construction joint. The vibration isolation and waterproof structure 3 is used to achieve vibration isolation and waterproofing between the new bridge abutment 2 and the existing basement floor slab 7, especially to prevent the vehicle vibrations received by the new bridge abutment 2 from being transmitted to the existing basement floor slab 7.

[0018] Specifically, the vibration isolation and waterproofing structure 3 includes a vibration isolation and waterproofing rubber seal 9. This seal 9 is made from a mixture of high-molecular inorganic water-absorbing and expanding material and modified rubber, exhibiting good durability and excellent adhesion to epoxy resin. Inside the vibration isolation and waterproofing rubber seal 9, several cavities 11 are arranged from the existing basement floor slab 7 towards the newly constructed bridge abutment 2. These cavities 11 provide compression and vibration filtering effects. Through this vibration isolation and waterproofing rubber seal 9, vehicle vibrations can be completely filtered out, resulting in no vibration in the station structure foundation. The vibration isolation and waterproofing rubber seal 9 also has a water-absorbing and expanding effect, which can expand and tighten the construction joints, achieving excellent waterproofing.

[0019] In this embodiment, the width of the vibration-damping and waterproof rubber seal 9 is greater than the width of the construction joint. Since the construction joint is typically 25mm wide, the width of the vibration-damping and waterproof rubber seal 9 is approximately 30mm.

[0020] This embodiment includes the following construction steps during construction:

[0021] Dewatering → Chisel away the corresponding area of ​​the existing basement floor slab 7 to form a chisel hole 8 → Construct the new bridge foundation → Rebuild the existing basement floor slab 7 to the edge of the construction joint → Apply epoxy adhesive 10 to both sides of the construction joint, i.e., the inner wall of the chisel hole 8 and the outer wall of the new bridge abutment 2, corresponding to the position of the vibration isolation and waterproof rubber seal 9 → Insert the vibration isolation and waterproof rubber seal 9, which is fixed between the existing basement floor slab 7 and the new bridge abutment 2 by epoxy adhesive 10 → Fill the ground structure.

[0022] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.

Claims

1. A vibration isolation and waterproof structure for the renovation of the basement of an elevated urban rail transit station, characterized in that: The system includes newly constructed bridge piers and a new bridge abutment. The newly constructed bridge piers are positioned above the new bridge abutment. The new bridge abutment passes through the existing basement floor slab, and the newly constructed bridge piers pass through the existing basement roof slab. The existing basement floor slab is excavated to create holes that match the new bridge abutment. A construction joint is left between the holes and the new bridge abutment. A vibration isolation and waterproofing structure is installed within this construction joint. The vibration isolation and waterproofing structure includes vibration isolation and waterproofing rubber seals. The two sides of the vibration isolation and waterproofing rubber seals are bonded to the inner wall of the holes and the outer wall of the new bridge abutment respectively using epoxy adhesive. The interior of the vibration isolation and waterproofing rubber seals has several cavities extending from the holes toward one side of the new bridge abutment.

2. The vibration isolation and waterproof structure for the renovation of the basement of an elevated urban rail transit station according to claim 1, characterized in that: The waterproof rubber seal is a seal made of polymer inorganic water-absorbing and swelling material and modified rubber.

3. The vibration isolation and waterproof structure for the renovation of the basement of an elevated urban rail transit station according to claim 1, characterized in that: The waterproof rubber seal is arranged around the perimeter of the newly constructed bridge abutment.

4. The vibration isolation and waterproof structure for the renovation of the basement of an elevated urban rail transit station according to claim 1, characterized in that: The width of the waterproof rubber seal is greater than the width of the joint in the construction structure.

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