Subway station prefabricated water retaining ridge, off-wall ditch water retaining ridge structure and subway station structural slab reserved hole water retaining ridge structure

Abstract

The utility model discloses a metro station prefabricated water retaining ridge, an off-wall ditch water retaining ridge structure and a metro station structural slab reserved hole water retaining ridge structure, and belongs to the technical field of metro station drainage. The prefabricated water retaining ridge for the subway station is characterized by comprising a water retaining ridge body which is prefabricated by adopting reinforcing steel bars and concrete and has an L-shaped section, one right-angle side of the water retaining ridge body is a base, the other right-angle side of the water retaining ridge body is a vertical back, the bottom of the base is provided with an inward groove which extends from one end of the base to the other end of the base, and the water retaining ridge body is provided with an opening. The two ends of the base are each provided with a bolt hole, and a grouting hole communicated with the inward groove is formed in the middle of the upper portion of the base. The prefabricated water retaining ridge is simple in structure, good in overall stability, easy to install, convenient to construct and good in adaptability to site construction conditions.

Description

Technical Field

[0001] This utility model relates to a prefabricated water-retaining sill for subway stations, and also to a water-retaining sill structure for a subway station ditch using the prefabricated water-retaining sill and a water-retaining sill structure with reserved openings in the structural slab of a subway station, belonging to the field of subway station drainage technology. Background Technology

[0002] Currently, the structure and interior decoration of subway stations are developing towards prefabrication, assembly, modularization, and componentization. Examples include prefabricated assembled subway station structures, prefabricated track top ventilation duct structures, prefabricated platform slab structures, and prefabricated staircase structures. Subway station drainage ditches are drainage ditches set along the structural walls of subway stations. They are generally constructed using cast-in-place reinforced concrete retaining walls, and after the construction of the cast-in-place reinforced concrete retaining walls is completed, waterproof coatings and waterproof mortar are applied.

[0003] However, cast-in-place construction has the following drawbacks: The construction of cast-in-place retaining walls requires pre-reserving steel reinforcement for assembly during the construction of the station's structural slab, affecting the construction speed and leveling of the slab surface, and creating safety hazards during construction; the interval between later pouring and the initial pre-reservation is generally more than 3 months before station decoration begins, making the reserved steel reinforcement prone to corrosion; during on-site pouring, there are a series of problems such as poor appearance quality, missing edges and corners, exposed reinforcement, small pouring space, small pouring volume, inability to achieve vibration, and insufficient compaction at corners, all affecting construction quality; after the retaining wall is cast, plastering is required for leveling, increasing construction steps, and in small spaces, manual plastering is the only option, increasing labor costs.

[0004] In existing technologies, prefabricated water-retaining sills are sometimes used to replace cast-in-place water-retaining sills. For example, Chinese utility model patent CN210658403 U discloses a prefabricated water-retaining sill segment and a wall-mounted drainage structure. The prefabricated water-retaining sill segment adopts a mortise and tenon structure, which requires high installation precision and pre-reserves assembly reinforcement, causing safety hazards during construction. It also has high requirements for the flatness of the existing station structure slab surface and low tolerance. Utility Model Content

[0005] In view of the above-mentioned defects in the existing technology, this utility model provides a prefabricated water-retaining sill for subway stations that is easy to install and adaptable to on-site construction conditions.

[0006] This utility model is achieved through the following technical solution: a prefabricated water-retaining sill for a subway station, characterized in that: it includes a water-retaining sill body with an L-shaped cross-section, which is prefabricated using steel bars and concrete. One right-angled side of the water-retaining sill body is a base, and the other right-angled side is a vertical back. The bottom of the base is provided with an inward groove extending from one end to the other end. A bolt hole is provided at each end of the base. A grouting hole communicating with the inward groove is provided at the middle position of the upper part of the base.

[0007] In this invention, the cross-section of the retaining wall body adopts an L-shaped structure, which provides good overall stability. It is prefabricated using reinforced concrete, resulting in good overall rigidity. Bolt holes at both ends of the base of the retaining wall body are used to fix the prefabricated retaining wall with fasteners, and grouting holes on the base of the retaining wall body are used to inject grout into the inward groove at the bottom of the base.

[0008] Furthermore, the main body of the water-retaining sill is in a straight line shape. The straight-line shape of the prefabricated water-retaining sill facilitates longitudinal straight-line splicing.

[0009] Furthermore, the overall shape of the water-retaining sill is L-shaped. The L-shaped prefabricated water-retaining sill is used for splicing at 90-degree corners.

[0010] This utility model also provides a water-retaining sill structure for a subway station's ditch. The technical solution adopted is as follows: a water-retaining sill structure for a subway station's ditch, including a water-retaining sill, characterized in that: the water-retaining sill is formed by assembling several of the above-mentioned prefabricated water-retaining sills in sequence, the vertical back of the prefabricated water-retaining sill is located on the side of the ditch, both ends of the prefabricated water-retaining sill are fixed to the station structure plate by vertical connectors, two adjacent prefabricated water-retaining sills are connected as one unit by connecting plates connected to two vertical connectors, and the base of the prefabricated water-retaining sill is bonded to the station structure plate by grouting material injected into the inner groove of the base.

[0011] Furthermore, waterproof strips are affixed to the vertical joints between the prefabricated water-retaining sills near the wall ditch, and the outside of the waterproof strips is coated with sealant for sealing.

[0012] Furthermore, a waterproof strip is affixed to the joint between the precast water-retaining sill in the ditch and the station structure slab, and the outside of the waterproof strip is coated with sealant for sealing.

[0013] This utility model also provides a pre-reserved opening water-retaining sill structure for a subway station structural slab. The technical solution adopted is as follows: a pre-reserved opening water-retaining sill structure for a subway station structural slab, characterized in that: a number of prefabricated water-retaining sills as described above are sequentially arranged around the outer perimeter of the pre-reserved opening in the station structural slab. The vertical back of the prefabricated water-retaining sill is located on the inner side. The two ends of the prefabricated water-retaining sill are respectively fixed to the station structural slab by vertical connectors. Two adjacent prefabricated water-retaining sills are connected as one unit by connecting plates connected to two vertical connectors. The base of the prefabricated water-retaining sill is bonded to the station structural slab by grouting material injected into the inner groove of the base.

[0014] Furthermore, the prefabricated water-retaining sills set at the four corners of the reserved openings in the station's structural slab are L-shaped as a whole.

[0015] Furthermore, a waterproof strip is affixed to the outside of the vertical connection joint between the prefabricated water-retaining sills, and the outside of the waterproof strip is coated with sealant for sealing.

[0016] The beneficial effects of this utility model are as follows: The precast water-retaining sill in this utility model has a simple structure, is easy to install, and has good adaptability to on-site construction conditions; the precast water-retaining sill adopts an L-shaped cross-section structure, which has high overall stability; the precast water-retaining sill is made of steel bars and concrete, which can ensure the overall rigidity of the structure; when assembling the precast water-retaining sill, vertical connectors are used to fix the precast water-retaining sill to the station structure slab, and the precast water-retaining sills are connected to each other by connecting plates, thereby ensuring reliable vertical and longitudinal connection of the assembled water-retaining sill and improving the overall integrity of the water-retaining sill; the grout injected into the inward groove at the bottom of the precast water-retaining sill can bond the precast water-retaining sill to the station structure slab, enhance the interface bonding performance between the precast water-retaining sill and the station structure slab, block the seepage path of water in the ditch, and at the same time, it can be pre-assembled when the station structure slab surface is uneven, providing reasonable tolerance for the installation of the precast water-retaining sill. Using prefabricated water-retaining sills for both off-wall and pre-drilled water-retaining sill construction requires minimal construction space and offers good adaptability to different construction periods. The water-retaining sill structure assembled from prefabricated sills boasts superior appearance quality, eliminates the need for post-construction plastering and leveling, and simplifies construction. During the construction of the external decorative joists for the station side walls, the bolt holes on the prefabricated water-retaining sill base provide reliable vertical connections to the external decorative joists via connectors. The prefabricated water-retaining sill base provides reliable vertical support for the joists, effectively improving the overall stability of the joists during installation and use. This invention avoids the need for pre-reserved reinforcing bars during cast-in-place construction of water-retaining sills, preventing delays in the construction speed of the station structural slab and avoiding safety hazards caused by pre-reserved reinforcing bars during construction. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the water-retaining sill structure of the subway station in Example 1;

[0018] Figure 2 This is a plan view of the water-retaining sill structure of the subway station in Example 1;

[0019] Figure 3 This is a cross-sectional schematic diagram of the water-retaining sill structure of the subway station in Example 1;

[0020] Figure 4 This is a partial cross-sectional schematic diagram of the water-retaining sill structure of the subway station in Example 1;

[0021] Figure 5 This is a three-dimensional structural diagram of the prefabricated water-retaining sill in Example 1;

[0022] Figure 6 This is a cross-sectional schematic diagram of the prefabricated water-retaining sill in Example 1;

[0023] Figure 7 This is a schematic diagram of the connecting plate in Embodiment 1;

[0024] Figure 8 This is a structural schematic diagram of the vertical connector in Embodiment 1;

[0025] Figure 9 This is a plan view of the water-retaining sill structure with reserved openings in the subway station structural slab in Example 2;

[0026] Figure 10 This is a top view of the L-shaped prefabricated water-retaining sill in Example 2;

[0027] In the diagram, 1. Precast water-retaining sill; 1.1. Vertical backing; 1.2. Base; 1.3. Grouting hole; 1.4 and 1.5. Bolt holes; 1.6. Inward groove; 1.7. Reinforcing bar; 2. Connecting plate; 2.1. Bolt hole; 3. Vertical connector; 4. Grouting material; 5. Connecting joint; 6. Station wall-mounted trench; 7. Station structural side wall; 8. Station structural slab; 9. Waterproof strip; 10. Sealant; 11. Waterproof mortar layer; 12. Nut; 13. Washer; 14. Ground layer; 15. Bonding layer; 16. Leveling layer; 17. Reserved opening in station structural slab. Detailed Implementation

[0028] The present invention will be further described below through non-limiting embodiments and in conjunction with the accompanying drawings.

[0029] Example 1

[0030] As attached Figures 1-8As shown, a subway station retaining wall structure includes a retaining wall installed on the station structural slab 8. The retaining wall is formed by assembling several prefabricated retaining wall sections 1 sequentially. The retaining wall and the station structural side wall 7 form a station retaining wall ditch 6. The prefabricated retaining wall section 1 includes an L-shaped retaining wall body made of reinforced concrete. One right-angled side of the retaining wall body is a base 1.2, and the other right-angled side is a vertical back 1.1. The bottom of the base 1.2 has an inward groove 1.6 extending from one end to the other. Bolt holes 1.4 and 1.5 are respectively provided at both ends of the base 1.2. A grouting hole 1.3 communicating with the inward groove 1.6 is provided at the middle of the upper part of the base 1.2. In this embodiment, the prefabricated retaining wall body is generally in a straight line shape. When the precast water-retaining sill 1 is installed, its vertical back 1.1 is located on the side of the station's wall ditch 6. Both ends of the precast water-retaining sill 1 are fixed to the station structural slab 8 via vertical connectors 3. Two adjacent precast water-retaining sills 1 are connected as one unit by connecting plates 2 connected to the two vertical connectors 3 using washers 13 and nuts 12. The vertical connectors 3 can be expansion bolts. The connecting plates 2 are strip steel plates with bolt holes 2.1 at both ends, allowing the connecting plates 2 to be fitted onto the vertical connectors 3 through the bolt holes 2.1 at both ends. The base 1.2 of the precast water-retaining sill is bonded to the station structural slab 8 by grouting material 4 injected into the inner groove 1.6 of the base 1.2. Grouting material 4 can be cement grout, cement mortar, polymer cement mortar, grouting material, fine stone concrete, sealant (polysulfide, polyurethane), etc. After hardening, it has good bonding performance, which can enhance the interface bonding performance between the precast water-retaining sill 1 and the station structural slab 8, and block the seepage path of water in the ditch. To ensure the waterproof performance of the water-retaining sill, a waterproof strip 9 is pasted at the vertical joint of the connection joint 5 between the precast water-retaining sills near the station ditch, and sealant 10 is applied to the outside of the waterproof strip 9 for sealing; a waterproof strip 9 is also pasted at the connection joint between the precast water-retaining sill 1 and the station structural slab 8 in the station ditch 6, and sealant 10 is applied to the outside of the waterproof strip 9 for sealing.

[0031] The construction steps for the subway station's retaining wall structure are as follows: The precast retaining wall 1 is transported to the station interior and pre-assembled according to its positioning. The flatness of the station structure slab 8 is adjusted based on the pre-assembly to improve the overall quality after assembly. The precast retaining wall 1 is inserted into the station structure slab 8 using vertical connectors 3. The connecting plate 2, washer 13, and nut 12 on the upper part of the vertical connector 3 are installed and tightened. Grouting material is injected into the groove 1.6 through the grouting holes 1.3 on the base 1.2 of the precast retaining wall 1. The grouting material enhances the bonding performance between components, completing the installation of the precast retaining wall 1. Waterproof strips 9 are pasted at the vertical joints 5 between the precast retaining walls 1, and sealant 10 is applied to the outside of the waterproof strips 9. Then, a leveling layer 16, a bonding layer 15, and a ground layer 14 are applied. "L"-shaped waterproof strips 9 are pasted at the corners of the precast retaining wall 1 and the station structure slab 8 within the station's retaining wall ditch 6, and sealant 10 is applied to the outside of the waterproof strips 9. Finally, a waterproof mortar layer 11 is applied inside the station's wall trench 16.

[0032] The other parts in this embodiment are all existing technologies and will not be described in detail here.

[0033] Example 2

[0034] As attached Figures 5-10 As shown, this is a water-retaining sill structure with a reserved opening in the structural slab of a subway station. Several prefabricated water-retaining sills 1 are sequentially arranged around the outer perimeter of the reserved opening 17 in the station structural slab 8. These prefabricated water-retaining sills 1 are assembled sequentially to form a water-retaining sill around the reserved opening 17. The structure of the prefabricated water-retaining sill 1 used in this embodiment is the same as that used in Embodiment 1, and will not be described again here. In this embodiment, during assembly, the vertical back 1.1 of the prefabricated water-retaining sill 1 is located on the inner side (i.e., close to the reserved opening 17 in the station structural slab). Both ends of the prefabricated water-retaining sill 1 are fixed to the station structural slab 8 by vertical connectors 3. Adjacent prefabricated water-retaining sills 1 are fastened together by connecting plates 2 connected to the two vertical connectors 3 using washers 13 and nuts 12. The vertical connector 3 can be made of expansion bolts. The connecting plate 2 is a strip steel plate with bolt holes 2.1 at both ends. The connecting plate 2 can be fitted onto the vertical connector 3 through the bolt holes 2.1 at both ends. The base 1.2 of the precast water-retaining sill and the station structure slab 8 are bonded together by grouting material 4 injected into the inner groove 1.6 of the base 1.2. The grouting material used in this embodiment is the same as that in embodiment 1. After hardening, the grouting material has good bonding performance, which can enhance the interface bonding performance between the precast water-retaining sill 1 and the station structure slab 8. To ensure the waterproof performance of the water-retaining sill, a waterproof strip 9 is pasted on the outside of the vertical joint 5 of the connection joint between the precast water-retaining sills, and a sealant 10 is applied to the outside of the waterproof strip 9 for sealing.

[0035] In this embodiment, the water-retaining sills at the four sides and corners of the reserved opening 17 in the station structural slab can all be assembled using the prefabricated water-retaining sills in a straight line shape as shown in Embodiment 1. To facilitate the assembly of the water-retaining sills at the four corners of the reserved opening 17, the water-retaining sills at the four corners of the reserved opening 17 in the station structural slab can also be as shown in the attached figure. Figure 10 The prefabricated water retaining wall shown is assembled in an L-shape. Except for its overall shape, the L-shaped prefabricated water retaining wall is the same as the straight-line prefabricated water retaining wall.

[0036] The construction steps for the pre-reserved opening water-retaining sill structure in the subway station structural slab are as follows: The prefabricated water-retaining sill 1 is transported to the station interior and pre-assembled according to its positioning. The flatness of the station structural slab 8 is treated based on the pre-assembly to improve the overall quality after assembly. The prefabricated water-retaining sill 1 is inserted into the station structural slab 8 using vertical connectors 3. The connecting plate 2, washer 13, and nut 12 on the upper part of the vertical connector 3 are installed and tightened. Grouting material is injected into the groove 1.6 through the grouting holes 1.3 on the prefabricated water-retaining sill 1. The grouting material enhances the bonding performance between components, completing the installation of the prefabricated water-retaining sill 1. A waterproof strip 9 is pasted on the outside of the vertical joint 5 between the prefabricated water-retaining sills 1. Sealant 10 is applied to the outside of the waterproof strip 9. A leveling layer 16, a bonding layer 15, and a ground layer 14 are then applied.

[0037] In this embodiment, the vertical back 1.1 of the prefabricated water-retaining sill 1 is set on the side close to the reserved opening 17 in the station structure slab, and the base 1.2 of the prefabricated water-retaining sill 1 is located on the side away from the reserved opening. This arrangement allows the water-retaining sill to be waterproof, and the base 1.2 of the prefabricated water-retaining sill 1 can also serve as a support during station decoration and renovation.

[0038] The other parts in this embodiment are all existing technologies and will not be described in detail here.

Claims

1. A prefabricated water retaining ridge for a subway station, characterized in that: The water baffle body is in L-shaped section, and one of the right angles is a base (1.2) and the other is a vertical back (1.1).

2. The prefabricated water retaining ridge for subway station according to claim 1, characterized in that: The water baffle body is in straight line.

3. The subway station prefabricated water retaining ridge according to claim 1, characterized in that: The water baffle body is in L-shaped section.

4. A subway station off-wall trench water retaining structure comprising a water retaining ridge, characterized by: The water baffle is formed by assembling a plurality of the prefabricated water baffles as claimed in any one of claims 1-2, the vertical back (1.1) of the prefabricated water baffles is located at the side of the wall ditch, the two ends of the prefabricated water baffles are fixed to the station structure plate through vertical connecting pieces (3), the two adjacent prefabricated water baffles are connected into one through the connecting plate (2) connected to the two vertical connecting pieces (3), and the base (1.2) of the prefabricated water baffles is bonded to the station structure plate through the grouting material in the inward groove (1.6) of the base (1.2).

5. The metro station off-wall trench water baffle structure according to claim 4, characterized in that: A waterproof strip is pasted at the vertical connecting seam between the prefabricated water baffles near the side of the wall ditch, and the outer side of the waterproof strip is coated with sealing glue.

6. The subway station off-wall trench water baffle structure according to claim 5, characterized in that A waterproof strip is pasted at the connecting seam between the prefabricated water baffles in the wall ditch and the station structure plate, and the outer side of the waterproof strip is coated with sealing glue.

7. A subway station structure plate reserved hole water stop structure, characterized by: A plurality of prefabricated water baffles as claimed in claim 1 are arranged in sequence along the outer periphery of the station structure plate reserved for opening, the vertical back (1.1) of the prefabricated water baffles is located at the inner side, the two ends of the prefabricated water baffles are fixed to the station structure plate through vertical connecting pieces (3), the two adjacent prefabricated water baffles are connected into one through the connecting plate (2) connected to the two vertical connecting pieces (3), and the base (1.2) of the prefabricated water baffles is bonded to the station structure plate through the grouting material in the inward groove (1.6) of the base (1.2).

8. The subway station structure slab reserved opening dam structure according to claim 7, characterized in that: The prefabricated water baffles arranged at the four corner positions of the station structure plate reserved for opening are in L-shaped section as a whole.

9. The subway station structure plate reserved opening dam structure according to claim 7 or 8, characterized in that: A waterproof strip is pasted at the outer side of the vertical connecting seam between the prefabricated water baffles, and the outer side of the waterproof strip is coated with sealing glue.

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