A built-in waterproof structure for pump rooms

Abstract

This application discloses a built-in waterproof structure for a pump house, including a track bed and steel segments, with the track bed housed within the steel segments. A sump is located in the middle of the track bed, and several concrete cross braces are spaced at intervals along the tunnel direction on the top of the sump. The inner wall and bottom surface of the sump, as well as the bottom surface of the concrete cross braces, are each coated with at least two layers of waterproof material. Both waterproof materials are PTN petroleum asphalt polyurethane. This application significantly improves the waterproof performance of the built-in pump house by using at least two layers of waterproof material. PTN petroleum asphalt polyurethane, as a waterproof material, possesses excellent tensile strength, bond strength, ductility, and durability. It can effectively reduce the relative movement between the steel segments and the track bed interface caused by stress or temperature changes, the displacement between the track bed and the sleepers, and the deformation of the pump house's inner surface caused by the steel segments under stress. This reduces the risk of the waterproof layer detaching due to vibration, improving the reliability and long-term stability of the waterproofing.

Description

Technical Field

[0001] This application relates to the field of shield tunnel pump room technology, specifically a built-in waterproof structure for a pump room. Background Technology

[0002] With the rapid advancement of cities and technology, the utilization rate of underground space is increasing. To meet drainage needs, pump rooms are installed inside shield tunnels. By separating the pump room at the lowest point of the line from the connecting passage, the longitudinal slope design is optimized, reducing the engineering risks associated with pump room construction.

[0003] Factors such as ground stress, temperature stress, and train operation vibration can easily cause displacement and deformation at the joint surfaces of different materials in the pump house, leading to cracking, damage, and detachment of rigid waterproof materials, which in turn reduces the waterproof performance of the pump house and decreases the overall structural quality and lifespan.

[0004] Therefore, the waterproof structure of the built-in pump house in the prior art has room for further improvement. Utility Model Content

[0005] In view of this, and considering the technical problems in the prior art where factors such as ground stress, temperature stress, and train operation vibration can easily cause displacement and deformation at the joint surfaces of different materials in the pump house, leading to cracking, damage, and detachment of rigid waterproof materials, this application provides a built-in waterproof structure for the pump house. By changing the waterproof structure inside the pump house, the waterproof performance of the built-in pump house is improved, the detachment of the waterproof layer due to vibration is reduced, the reliability of waterproofing is increased, the overall quality of the pump house is improved, and its service life is extended.

[0006] To achieve the above objectives, this application provides the following technical solution: a built-in waterproof pump room structure, comprising: Track bed and steel pipe segments; the track bed is set inside the steel pipe segments. A water collection pit is provided in the middle of the track bed, and several concrete cross braces are provided at intervals on the top of the water collection pit along the tunnel direction. The inner wall, bottom surface, and bottom surface of the concrete cross brace of the water collection pit are all provided with at least two layers of waterproof material. Both waterproofing materials are PTN petroleum asphalt polyurethane materials.

[0007] Compared with existing technologies, by applying at least two layers of waterproofing material to the inner wall and bottom surface of the sump and the bottom surface of the concrete cross bracing, the waterproofing performance of the built-in pump house can be improved. Furthermore, PTN petroleum asphalt polyurethane material, as a waterproofing material, possesses good tensile strength, bond strength, ductility, and durability. It can effectively reduce the impact of relative movement between the steel pipe segments and the track bed, and between the track bed and the sleepers caused by stress or temperature changes, as well as the deformation of the pump house's inner surface caused by stress on the steel pipe segments, on the waterproofing structure. Compared with traditional cement waterproof mortar and cement-based penetrating crystalline waterproof coatings, PTN petroleum asphalt polyurethane material can improve the waterproofing performance of the built-in pump house, reduce the risk of the waterproofing layer peeling off due to vibration or moisture, and increase waterproofing reliability.

[0008] Preferably, the two waterproof materials include a first waterproof layer and a second waterproof layer, which are arranged sequentially from the water collection pit outwards. The first waterproof layer and the second waterproof layer are sequentially arranged from the concrete transverse support toward the sump.

[0009] In this embodiment, two waterproof layers are superimposed to form a double line of defense. Even if one layer is damaged or aged, the other layer can still effectively prevent water penetration, greatly improving the overall waterproof effect and enhancing the durability and safety of the built-in pump room structure.

[0010] Preferably, the length of the second waterproof layer along the horizontal direction of the bottom of the sump is ≥250mm; The second waterproof layer extends upward from the lowest point of the inner wall of the sump, with an extension length exceeding the joint surface between the track bed and the steel pipe section by at least 100 mm.

[0011] In this embodiment, by setting the lengths of the second waterproof layer in both the horizontal and vertical directions, it is ensured that the second waterproof layer provides sufficient coverage of the bottom of the sump on top of the first waterproof layer, and provides secondary reinforcement of important locations to prevent leakage, thereby enhancing the waterproof effect.

[0012] Preferably, both the first and second waterproof layers are made of 2mm to 3mm thick PTN petroleum asphalt polyurethane material.

[0013] In this embodiment, by combining a first waterproof layer and a second waterproof layer of different thicknesses, the waterproofing effect is enhanced, and material costs can be saved to a certain extent. The first and second waterproof layers can form a solid basic waterproof barrier, effectively resisting the intrusion of most water, and further improving the overall waterproof performance of the built-in pump house.

[0014] Preferably, the bottom of the water collection pit is provided with multiple pump pits, and a drainage pump is provided at the bottom of the pump pits.

[0015] In this embodiment, the water in the sump is pumped out by a drainage pump to achieve the drainage function. The sump and the pump pit work together to ensure the normal operation of the built-in pump room drainage system.

[0016] Preferably, the interior of the steel pipe segment is filled with sulfoaluminate micro-expansion cement without coarse or fine aggregates.

[0017] In this embodiment, sulfoaluminate micro-expansion cement without coarse or fine aggregates can reduce cracks and voids, and improve the sealing, durability and stability of steel pipe segments.

[0018] Preferably, the joint between the track bed and the steel pipe segment is provided with water-swellable polyurethane sealant.

[0019] In this embodiment, the water-swellable polyurethane sealant can prevent wastewater from entering the steel pipe segments and bonding with the track bed, thus affecting the stability of the track bed. The water-swellable polyurethane sealant will expand in volume after contact with water, effectively filling the tiny gaps at the joints and forming a tight waterproof barrier to prevent water from penetrating into the track bed through the joints, thereby improving the waterproof performance of the built-in pump house structure.

[0020] Preferably, a concrete segment is provided on the side of the steel pipe segment away from the sump, and a water-swellable polyurethane sealant is also provided between the concrete segment and the track bed.

[0021] In this embodiment, the water-swellable polyurethane sealant can prevent moisture from seeping in from the joint between the concrete pipe segment and the track bed, affecting the stability of the track bed, thereby improving the waterproof performance of the built-in pump house structure.

[0022] Preferably, the top surface of the concrete pipe segment and the surface of the track bed are also provided with PTN petroleum asphalt polyurethane material.

[0023] In this embodiment, the waterproof performance of concrete segments and track bed can be further improved. PTN petroleum asphalt polyurethane material has good tensile strength, bond strength, ductility and durability, reducing the detachment of the waterproof layer due to vibration and increasing the reliability of waterproofing.

[0024] Preferably, the top surface of the concrete cross brace is lower than the top surface of the track bed.

[0025] In this embodiment, it is convenient to place other structures on the concrete cross brace in the future, so as to avoid the concrete cross brace directly bearing the track load and prevent stress concentration. Attached Figure Description

[0026] Figure 1 A schematic plan view of a built-in waterproof pump room structure provided in an embodiment of this application; Figure 2 A longitudinal sectional view of a built-in waterproof pump room structure provided in an embodiment of this application; Figure 3 for Figure 1 Cross-sectional structure diagram of AA Figure 1 ; Figure 4 for Figure 1 Cross-sectional structure diagram of AA Figure 2 .

[0027] In the diagram: 1. Track bed; 2. Steel pipe segment; 3. Sump pit; 4. Concrete cross brace; 5. Waterproofing material; 6. Sulfoaluminate micro-expansion cement; 7. Water-swellable polyurethane sealant; 8. Concrete pipe segment; 9. Pump pit; 51. First waterproof layer; 52. Second waterproof layer. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solutions of this disclosure, the following detailed, clear, and complete description of this disclosure is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this disclosure and are not intended to limit it.

[0029] In the description of this application, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0030] Those skilled in the art should understand that in the disclosure of this application, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this application.

[0031] The present application will now be described in further detail with reference to the accompanying drawings, see below. Figures 1 to 4 illustrate.

[0032] This embodiment provides a built-in waterproof structure for a pump house, which is applied in the field of shield tunnel pump house technology. Specifically, as shown in... Figures 1 to 4As shown, the structure includes a track bed 1 and steel pipe segments 2. The track bed 1 is located inside the steel pipe segments 2 and is situated at the lowest point of the shield tunnel section. A sump pit 3 is located in the middle of the track bed 1. Several concrete cross braces 4 are spaced along the tunnel direction on the top of the sump pit 3. The concrete cross braces 4 connect the track bed 1 on both sides of the sump pit 3. Water ditches are provided on the track bed 1 on both sides of the sump pit 3. The inner wall, bottom surface, and surface of the concrete cross braces 4 are all coated with at least two layers of waterproof material 5. The surface of the concrete cross braces 4 refers to the surface that comes into contact with water or may be eroded by water, and requires waterproofing treatment. The multi-layer waterproof structure can improve the waterproof performance of the built-in pump house and avoid the weaknesses that may exist in single-layer waterproofing. Both waterproof materials 5 are PTN petroleum asphalt polyurethane materials (elastic recovery rate ≥85%). PTN petroleum asphalt polyurethane materials have good tensile strength, bond strength, ductility and durability. They can effectively reduce the relative movement between the steel pipe segment 2 and the track bed 1 caused by stress or temperature changes, the displacement between the track bed 1 and the sleeper, and the deformation of the inner surface of the pump house caused by the steel pipe segment 2 under stress. Compared with traditional cement waterproof mortar and cement-based penetrating crystalline waterproof coatings, PTN petroleum asphalt polyurethane materials can improve the waterproof performance of the built-in pump house, reduce the detachment of the waterproof layer due to vibration, and increase the reliability of waterproofing.

[0033] Specifically, such as Figures 3 to 4 As shown, the two waterproof materials 5 include a first waterproof layer 51 and a second waterproof layer 52. The first waterproof layer 51 and the second waterproof layer 52 are arranged sequentially from the water collection pit 3 outwards. The first waterproof layer 51 and the second waterproof layer 52 are arranged sequentially from the concrete transverse support towards the water collection pit 3. The two waterproof layers are superimposed to form a double line of defense. Even if one layer is damaged or aged, the other layer can still effectively prevent water penetration, greatly improving the overall waterproof effect and enhancing the durability and safety of the built-in pump house structure.

[0034] The first waterproof layer 51 fully covers the inner wall and bottom surface of the sump pit 3. The second waterproof layer 52 has a horizontal length of ≥250mm along the bottom of the sump pit 3. That is, one end of the second waterproof layer 52 starts from the lowest point where the inner wall and bottom surface of the sump pit 3 meet, and extends to the left or right along the horizontal direction of the bottom surface of the sump pit 3, with an extension length of L1, which is not less than 250mm. This ensures that the second waterproof layer 52 provides sufficient coverage to the bottom of the sump pit 3 on the basis of the first waterproof layer 51, and provides secondary reinforcement to important areas to prevent leakage and enhance the waterproof effect. The second waterproof layer 52 extends upward from the lowest point of the inner wall of the sump 3, with an extension length exceeding the joint surface (joint) of the track bed 1 and the steel pipe segment 2 by at least 100mm. In other words, the other end of the second waterproof layer 52 starts from the same position (the lowest point where the inner wall of the sump 3 meets the bottom surface) and extends towards the top of the inner wall of the sump 3 until it reaches the joint position of the track bed 1 and the shield tunnel segment. It continues to extend upward and exceeds the joint position by a length of L1, where L1≥100mm. This provides secondary reinforcement coverage to the joint position, preventing water from seeping from the joint position and enhancing the waterproof effect.

[0035] The first waterproof layer 51 and the second waterproof layer 52 are both made of 2mm to 3mm (e.g., 2mm and 3mm) thick PTN petroleum asphalt polyurethane material. By combining the first waterproof layer 51 and the second waterproof layer 52 with different thicknesses, the waterproof effect is enhanced and the material cost is saved to a certain extent. The first waterproof layer 51 and the second waterproof layer 52 can form a stable basic waterproof barrier, effectively resisting the intrusion of most water, and further improving the overall waterproof performance of the built-in pump room.

[0036] In the actual construction process, the first waterproof layer 51 is first evenly applied to the inner wall and bottom surface of the sump 3, ensuring that the application is uniform and without omissions, with a thickness of 3mm to 4mm. After the first waterproof layer 51 is completely dry and cured, the second waterproof layer 52 is then applied according to the length and position specified in the design, ensuring that the thickness of the second waterproof layer 52 reaches 2mm to 3mm, and that the application quality of both the first waterproof layer 51 and the second waterproof layer 52 meets the requirements.

[0037] Furthermore, such as Figures 3 to 4 As shown, the interior of the steel pipe segment 2 is filled with sulfoaluminate micro-expansion cement 6 without coarse or fine aggregates, which can reduce cracks and voids and improve the sealing, durability and stability of the steel pipe segment 2. Adjacent steel pipe segments 2 are fixedly connected by bolts to ensure the stability and integrity of each segment and prevent displacement or misalignment of the segments due to stress or changes in the surface of the track bed 1.

[0038] Furthermore, such as Figures 1 to 4As shown, the joint between the track bed 1 and the steel pipe segment 2 is provided with water-swellable polyurethane sealant 7, which can prevent wastewater from entering the steel pipe segment 2 and bonding with the track bed 1, thus affecting the stability of the track bed 1. The water-swellable polyurethane sealant 7 will expand in volume after contact with water, effectively filling the tiny gaps at the joint and forming a tight waterproof barrier to prevent water from penetrating into the track bed 1 through the joint, thereby improving the waterproof performance of the built-in pump house structure.

[0039] Furthermore, such as Figure 1 As shown, the bottom of the water collection pit 3 is equipped with multiple pump pits 9, and the bottom of the pump pits 9 is equipped with drainage pumps. The drainage pumps deliver the water in the water collection pit 3 to achieve the drainage function. The water collection pit 3 and the pump pits 9 work together to ensure the normal operation of the built-in pump room drainage system.

[0040] Furthermore, such as Figures 3 to 4 As shown, a concrete segment 8 is provided on the side of the steel pipe segment 2 away from the water collection pit 3. The concrete segment 8 is located at the bottom of the water collection pit 3 and the remaining position. The steel pipe segment 2 is located at the bottom of the water collection pit 3 and at the position of the drainage pump. Water-swellable polyurethane sealant 7 is also provided between the concrete segment 8 and the track bed 1, which can prevent water from seeping in from the joint between the concrete segment 8 and the track bed 1 and affecting the stability of the track bed 1, thereby improving the waterproof performance of the built-in pump house structure.

[0041] Among them, such as Figures 1 to 4 As shown, the top surface of the concrete segment 8 and the surface of the track bed 1 are also provided with PTN petroleum asphalt polyurethane material, which can further improve the waterproof performance of the concrete segment 8 and the track bed 1. PTN petroleum asphalt polyurethane material has good tensile strength, bonding strength, ductility and durability, reduces the waterproof layer from falling off due to vibration and increases the reliability of waterproofing.

[0042] Furthermore, such as Figures 3 to 4 As shown, long sleepers are installed on the track bed 1 and at both ends of the sump pit 3. The top surface of the concrete cross brace 4 is lower than the top surface of the track bed 1, which facilitates the subsequent placement of other structures on the concrete cross brace 4, avoids the concrete cross brace 4 directly bearing the track load, and prevents stress concentration.

[0043] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A built-in pump room waterproof structure, characterized by, include: The track bed (1) and the steel pipe segment (2) are arranged inside the steel pipe segment (2); A water collection pit (3) is provided in the middle of the track bed (1), and a number of concrete cross braces (4) are provided at intervals along the tunnel direction on the top of the water collection pit (3). The inner wall, bottom surface and concrete cross brace (4) of the water collection pit (3) are provided with at least two layers of waterproof material (5). Both waterproofing materials (5) are PTN petroleum asphalt polyurethane materials.

2. The built-in pump room waterproof structure according to claim 1, characterized in that, The two waterproof materials (5) include a first waterproof layer (51) and a second waterproof layer (52), which are arranged sequentially from the water collection pit (3) outwards as the first waterproof layer (51) and the second waterproof layer (52); The first waterproof layer (51) and the second waterproof layer (52) are sequentially arranged from the concrete transverse support to the sump (3).

3. The built-in waterproof pump room structure according to claim 2, characterized in that, The second waterproof layer (52) has a horizontal length of ≥250mm along the bottom of the sump (3); The second waterproof layer (52) extends upward from the lowest point of the inner wall of the sump (3), and the extension length exceeds the joint surface of the track bed (1) and the steel pipe segment (2) by at least 100 mm.

4. The built-in pump room waterproof structure according to claim 2, characterized in that, Both the first waterproof layer (51) and the second waterproof layer (52) are made of 2mm to 3mm thick PTN petroleum asphalt polyurethane material.

5. The built-in pump room waterproof structure according to claim 1, characterized in that, The bottom of the water collection pit (3) is provided with multiple pump pits (9), and the bottom of the pump pits (9) is provided with drainage pumps.

6. The built-in pump room waterproof structure according to claim 1, characterized in that, The steel pipe segment (2) is filled with sulfoaluminate micro-expansion cement (6) without coarse or fine aggregate.

7. The built-in waterproof pump room structure according to claim 1, characterized in that, The joint between the track bed (1) and the steel pipe segment (2) is provided with water-swellable polyurethane sealant (7).

8. The built-in waterproof pump room structure according to claim 1, characterized in that, The steel pipe segment (2) is provided with a concrete pipe segment (8) on the side away from the water collection pit (3), and a water-swellable polyurethane sealant (7) is also provided between the concrete pipe segment (8) and the track bed (1).

9. The built-in waterproof pump room structure according to claim 8, characterized in that, The top surface of the concrete pipe segment (8) and the surface of the track bed (1) are also provided with PTN petroleum asphalt polyurethane material.

10. The built-in waterproof pump room structure according to claim 1, characterized in that, The top surface of the concrete cross brace (4) is lower than the top surface of the track bed (1).

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