Built-in pump house floating plate ballast bed structure in super-high curve section

Abstract

This utility model discloses a floating slab track bed structure with an integrated pump station in a high-elevation curve section, including a base, vibration isolators, and a floating slab. Both the floating slab and the base are inclined. The floating slab is mounted on the base via vibration isolators, which are respectively located on the high and low sides of the floating slab. A water collection pit and a pump pit are provided in the middle of the base, and the water collection pit and the pump pit are connected. A groove is formed on the low side of the floating slab, and a protrusion that mates with the groove is provided on the low side of the base, serving as part of the side portion of the water collection pit and the pump pit. The advantages of this utility model are: overcoming the shortcomings of existing solutions that cannot be applied to high-elevation sections, expanding the application range of integrated pump stations, without reducing the thickness of the floating slab in conventional sections, without reducing the track vibration reduction effect, and simultaneously preventing the lower vibration isolators from being submerged in water, ensuring the implementation of environmental protection requirements.

Description

Technical Field

[0001] This utility model relates to the technical field of floating slabs, and in particular to a floating slab track bed structure for a built-in pump house in a superelevation curve section. Background Technology

[0002] When the tunnel of rail transit is deeply buried, the use of a pump house built into the section at the lowest point of the section can reduce the difficulty and risk of civil construction and save investment compared with the traditional scheme of combining the pump house with the connecting passage. It has obvious advantages and is currently being promoted and applied in rail transit construction in various regions. Among them, the scheme of the pump house built into the track bed in ordinary track bed sections is relatively mature, and the cast-in-place and precast schemes have been widely used in Ningbo, Shanghai and other places. There are preliminary scheme studies on the structure of the pump house built into the track bed of floating slab track bed, but the scope of application is very limited. It is only applicable to straight sections or sections with small track superelevation. In sections with large superelevation, the elevation of the lower track foundation surface is lower than the water level of the first pump, which causes the vibration isolators to be submerged in water for a long time, affecting the durability, reliability and vibration reduction effect of the floating slab structure. Under this working condition, three treatment methods can generally be adopted: (1) Select and design the water pump separately and compress the water level range. This solution can avoid the above problems, but it increases the type of water pump, the type and quantity of spare parts increase accordingly, and maintenance is inconvenient; in addition, the pump needs to be started frequently in daily use, the failure rate of the pump increases and the service life is reduced; (2) When the error control of civil construction is relatively ideal, the method of compressing the height of the contact network and increasing the height of the track structure can be adopted to increase the elevation of the inner track base. This solution increases the difficulty of contact network design, reduces the insulation gap, and reduces the adjustment margin in the later stage, which is obviously disadvantageous; (3) Abandon the built-in pump room solution and adopt the traditional section pump room and connecting channel combined solution, which has high construction difficulty, risk and investment.

[0003] The route selection and design of urban rail transit is greatly affected by existing structures and other restrictive factors, and the requirements for environmental vibration are high. The overlap of the lowest point of the section (i.e., the location of the pump house), the superelevation curve, and the floating slab track bed often occurs, but there is currently no feasible, reliable, economical and mature track bed solution for this working condition. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the existing technology by providing a floating slab track bed structure for built-in pump stations in areas with large superelevation curves. This structure consists of a base, vibration isolators, and floating slabs. Both the floating slabs and the base are inclined. The lower side of the floating slabs has a groove, and the lower side of the base has a protrusion that matches the groove. The protrusion serves as part of the side of the sump and pump pit. The protrusion and groove design can solve the problem that existing built-in pump station floating slab track bed schemes, when applied to large superelevation curves, suffer from the vibration isolators becoming waterlogged and unusable due to the lower track bed base elevation being lower than the water level of the first pump.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A floating slab track bed structure with built-in pump station in a superelevation curve section includes a base, vibration isolators, and a floating slab. Both the floating slab and the base are inclined. The floating slab is mounted on the base via vibration isolators, which are respectively located on the high and low sides of the floating slab. A water collection pit and a pump pit are provided in the middle of the base, and the water collection pit and the pump pit are connected. A groove is formed on the low side of the floating slab, and a protrusion that mates with the groove is provided on the low side of the base. The protrusion serves as part of the side of the water collection pit and the pump pit.

[0007] The floating plate has a through hole in the middle, and the position of the through hole corresponds to the position of the pump pit. The top of the through hole is closed by a cover plate.

[0008] The top of the through hole is provided with a tongue and groove, and several pre-embedded sleeves are provided along the circumference of the tongue and groove. The cover plate is fixed by the cooperation of the pre-embedded sleeves and the bolt structure.

[0009] The floating plate has a drainage pipe groove and a pre-embedded pipe on one side. The location of the drainage pipe groove and the pre-embedded pipe corresponds to the location of the pump pit. The drainage pipe groove is used to install the drainage pipe, and the pre-embedded pipe is used to place the cable.

[0010] A pre-embedded drainage pipe is installed on the lower side of the base. The pre-embedded drainage pipe is equipped with a one-way valve and is connected to the water collection pit and the pump pit respectively.

[0011] The top of the floating plate is secured to the steel rail with fasteners.

[0012] The advantages of this utility model are:

[0013] 1. Overcome the shortcomings of existing solutions that cannot be applied to high-altitude areas, expand the application scope of built-in pump rooms, and do not reduce the thickness of floating slabs in conventional areas or reduce the track vibration reduction effect. At the same time, avoid water immersion in the lower vibration isolator, and ensure the implementation of environmental protection requirements.

[0014] 2. No special design is required for the drainage pump and contact network, reducing the amount of spare parts and maintenance work;

[0015] 3. A tongue and groove joint is reserved at the opening of the floating plate pump pit, and a sleeve is pre-embedded in the tongue and groove joint and fixed with a wing nut. The overall appearance is neat and tidy with no protrusions, which is conducive to evacuation and easy to disassemble, install and maintain.

[0016] 4. It can be used as a remedial solution when tunnel construction errors are large and alignment and slope adjustment are limited in straight sections and small superelevation curves. Attached Figure Description

[0017] Figure 1This is a plan view of the floating slab track bed structure of the built-in pump house in the superelevation curve section of this utility model;

[0018] Figure 2 for Figure 1 Cross-sectional view of the floating plate under section AA;

[0019] Figure 3 for Figure 1 Cross-sectional view of the floating slab track bed structure with built-in pump house in the superelevation curve section of the middle AA section.

[0020] Figure 4 for Figure 1 Cross-sectional view of the floating plate under the middle BB section;

[0021] Figure 5 for Figure 1 Cross-sectional view of the built-in pump house floating slab track bed structure in the superelevation curve section of the middle BB section.

[0022] like Figures 1-5 As shown in the figure, the labels represent:

[0023] 1. Base; 2. Vibration isolator; 3. Floating plate; 4. Sump; 5. Pump pit; 6. Groove; 7. Protrusion; 8. Through hole; 9. Cover plate; 10. Tongue and groove; 11. Embedded sleeve; 12. Drainage pipe groove; 13. Drainage pipe; 14. Embedded pipe; 15. One-way valve; 16. Fastener; 17. Rail; 18. Tunnel; 19. Detailed Implementation

[0024] 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:

[0025] Example: Figures 1-5As shown, this embodiment relates to a floating slab track bed structure with an internal pump station in a superelevation curve section. The structure mainly includes a base 1, vibration isolators 2, and a floating slab 3. Both the floating slab 3 and the base 1 are inclined. The base 1 is located on the inner wall of the tunnel 19. The top of the floating slab 3 is fixed to the rail 18 via fasteners 17. The floating slab 3 is installed on the base 1 via vibration isolators 2 (spring vibration isolators are selected), which are located on the high and low sides of the floating slab 3. A sump 4 and a pump pit 5 are provided in the middle of the base 1, and the sump 4 and pump pit 5 are connected. The bottom of the pump pit 5 is lower than the bottom of the sump 4 to allow water from the sump 4 to flow into the pump pit 5. A water pump is placed in the pump pit 5 for drainage. In this embodiment, the length and width of the sump 4 are determined based on drainage requirements and tunnel dimensions. A pump pit 5 is provided on each side of the longitudinal direction (the extension direction of the tunnel) of the sump 4. Of course, different numbers of pump pits 5 can be selected according to actual conditions (drainage volume and pump parameters). The floating slab 3 adopts a cast-in-place, precast, or precast wet-joint structure. The low side of the floating slab 3 is provided with a groove 6, and the low side of the base 1 is provided with a protrusion 7 that matches the groove 6. The protrusion 7 serves as part of the side of the water collection pit 4 and the pump pit 5. The setting of the protrusion 7 makes the two (lateral) sides of the water collection pit 4 and the pump pit 5 equal in height, which can reduce the overflow of water in the water collection pit 4 and the pump pit 5, thereby preventing the vibration isolator 2 on the low side of the floating slab 3 from failing due to water immersion and becoming unusable.

[0026] like Figures 1-5 As shown, a through hole 8 is provided in the middle of the floating plate 3. The location of the through hole 8 corresponds to the location of the pump pit 5. The through hole 8 is used for pump installation, maintenance and replacement. The top of the through hole 8 is sealed by a cover plate 9. Specifically, a tongue and groove joint 10 is provided around the top of the through hole 8. Several pre-embedded sleeves 11 are provided along the circumference of the tongue and groove joint 10. The cover plate 9 is fixed by the cooperation of the pre-embedded sleeves 11 and the bolt structure. In this embodiment, the bolt structure includes a screw and a wing nut. One end of the screw passes through the cover plate 9 and is threaded to the pre-embedded sleeve 11, and the other end is fixed to the cover plate 9 by the wing nut. A drain pipe groove 12 and a pre-embedded pipe 13 are provided on one side (high side or low side, generally the right side in the direction of travel). The location of the drain pipe groove 12 and the pre-embedded pipe 13 corresponds to the location of the pump pit 5. In this embodiment, the drain pipe groove 12 is located at the top of the high side of the floating plate 3. The drain pipe groove 12 is used to install the drain pipe, and the drain pipe is connected to the water pump in the pump pit 5 to drain the water in the pump pit 5. The pre-embedded pipe 13 is located below the drain pipe groove 12. The pre-embedded pipe 13 is used to place the cable of the water pump. The pump pit 5 can also be used to place lighting equipment, and the pre-embedded pipe 13 can also be used to place the cable of the lighting equipment.

[0027] like Figures 1-5As shown, a pre-embedded drainage pipe 15 is installed on the lower side of the base 1. A one-way valve 16 is installed on the pre-embedded drainage pipe 15. The pre-embedded drainage pipe 15 is connected to the sump 4 and the pump pit 5 respectively. The one-way valve 16 ensures that water can only flow from the lower side of the base 1 through the pre-embedded drainage pipe 15 to the sump 4 and the pump pit 5, and cannot flow from the sump 4 and the pump pit 5 through the pre-embedded drainage pipe 15 to the lower side of the base 1. In this embodiment, the spacing between the pre-embedded drainage pipes 15 is no greater than 1.5m, the slope is no less than 1%, and the one-way valve 16 is made of stainless steel.

[0028] The beneficial technical effects of this embodiment are as follows:

[0029] 1. Overcome the shortcomings of existing solutions that cannot be applied to high-altitude areas, expand the application scope of built-in pump rooms, and do not reduce the thickness of floating slabs in conventional areas or reduce the track vibration reduction effect. At the same time, avoid water immersion in the lower vibration isolator, and ensure the implementation of environmental protection requirements.

[0030] 2. No special design is required for the drainage pump and contact network, reducing the amount of spare parts and maintenance work;

[0031] 3. A tongue and groove joint is reserved at the opening of the floating plate pump pit, and a sleeve is pre-embedded in the tongue and groove joint and fixed with a wing nut. The overall appearance is neat and tidy with no protrusions, which is conducive to evacuation and easy to disassemble, install and maintain.

[0032] 4. It can be used as a remedial solution when tunnel construction errors are large and alignment and slope adjustment are limited in straight sections and small superelevation curves.

[0033] 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 floating slab track bed structure with built-in pump house in a superelevation curve section, characterized in that... The system includes a base, vibration isolators, and a floating plate. Both the floating plate and the base are inclined. The floating plate is mounted on the base via vibration isolators, which are located on the high and low sides of the floating plate. A water collection pit and a pump pit are provided in the middle of the base and are connected. A groove is provided on the low side of the floating plate, and a protrusion that mates with the groove is provided on the low side of the base. The protrusion serves as part of the side portion of the water collection pit and the pump pit.

2. The floating slab track bed structure with built-in pump house in a superelevation curve section as described in claim 1, characterized in that... The floating plate has a through hole in the middle, and the position of the through hole corresponds to the position of the pump pit. The top of the through hole is closed by a cover plate.

3. The floating slab track bed structure with built-in pump house in a superelevation curve section as described in claim 2, characterized in that... The top of the through hole is provided with a tongue and groove, and several pre-embedded sleeves are provided along the circumference of the tongue and groove. The cover plate is fixed by the cooperation of the pre-embedded sleeves and the bolt structure.

4. The floating slab track bed structure with built-in pump house in a superelevation curve section as described in claim 2, characterized in that... The floating plate has a drainage pipe groove and a pre-embedded pipe on one side. The location of the drainage pipe groove and the pre-embedded pipe corresponds to the location of the pump pit. The drainage pipe groove is used to install the drainage pipe, and the pre-embedded pipe is used to place the cable.

5. The floating slab track bed structure with built-in pump house in a superelevation curve section as described in claim 1, characterized in that... A pre-embedded drainage pipe is installed on the lower side of the base. The pre-embedded drainage pipe is equipped with a one-way valve and is connected to the water collection pit and the pump pit respectively.

6. The floating slab track bed structure with built-in pump house in a superelevation curve section as described in claim 1, characterized in that... The top of the floating plate is secured to the steel rail with fasteners.

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