Steel corrugated plate box culvert construction structure

Abstract

The utility model relates to a kind of steel corrugated plate box culvert construction structures, belong to box culvert construction structure technical field, including box culvert ontology, box culvert ontology includes corrugated roof, corrugated side plate and corrugated bottom plate, the lower end outside of corrugated side plate and the both ends outside of corrugated bottom plate are equipped with the connecting outer flanging of mutual cooperation, L type fixed screw rod is fixed on connecting outer flanging, the concrete foundation layer that supports it is equipped below corrugated bottom plate, milling material cushion layer is equipped below concrete foundation layer, the flow state cement soil layer that fixed screw rod and connecting outer flanging are covered inside is equipped above concrete foundation layer.The utility model box culvert ontology uses the splicing mode of "flanging+screw rod", without pouring a large amount of concrete on site, construction cycle is short.Multilayer foundation support structure provides all-round support for box culvert, reduces settlement and deformation;L type fixed screw rod is covered and fixed in flow state cement soil layer, enhances the stability of box culvert ontology.

Description

Technical Field

[0001] This utility model relates to a construction structure for corrugated steel box culverts, belonging to the technical field of box culvert construction structure. Background Technology

[0002] Box culverts are underground drainage structures. Traditional box culverts are mostly made of cast concrete, which has problems such as long construction period, large self-weight, high requirements for foundation bearing capacity, and high maintenance costs. Corrugated steel plate box culverts have gradually replaced traditional concrete box culverts due to their advantages of light weight, high strength, and high construction efficiency. However, existing corrugated steel plate box culverts often have problems such as insufficient foundation support stability at the joints, which affects the service life and safety of the box culvert. Utility Model Content

[0003] This utility model provides a construction structure for corrugated steel box culverts, which solves the problems existing in the background art.

[0004] This utility model relates to a construction structure for a corrugated steel box culvert, including a box culvert body. The box culvert body includes a corrugated top plate, corrugated side plates, and a corrugated bottom plate. The upper inner side of the corrugated side plate is provided with an installation flange that is attached to the lower inner side of the corrugated top plate. The lower outer side of the corrugated side plate and both outer sides of the corrugated bottom plate are provided with mutually cooperating connecting flanges. An L-shaped fixing screw is fixed on the connecting flange. A concrete foundation layer supporting it is provided below the corrugated bottom plate. A milled material pad layer is provided below the concrete foundation layer. A fluidized cement-soil layer covering the fixing screw and connecting flange is provided above the concrete foundation layer. A backfilled sand and gravel layer is provided on the outer side of the box culvert body above the fluidized cement-soil layer. A road surface layer is provided above the backfilled sand and gravel layer.

[0005] As a preferred embodiment, the lower outer side of the corrugated side plate and the inner sides of both ends of the corrugated bottom plate are provided with interlocking connecting inner flanges, which are fixed by bolts. The front and rear ends of the corrugated top plate, corrugated side plate, and corrugated bottom plate are all provided with fixing flanges. The connecting inner flanges, in conjunction with the bolts, together with the outer connecting outer flanges and fixing screws, form a double fixing structure of "inner bolts + outer screws," which significantly improves the connection strength between the corrugated side plate and the corrugated bottom plate and prevents loosening at the splice. The fixing flanges at the front and rear ends facilitate the splicing and assembly of multi-section box culverts, while ensuring the structural integrity of the splice ends, providing a basis for subsequent sealing treatment, and improving the overall splicing efficiency and sealing performance of the box culvert.

[0006] As a preferred option, sealing gaskets are provided at the joints of the mounting flange, the connecting inner flange, the connecting outer flange, and the fixing flange. The sealing gaskets can fill the tiny gaps at the joints of each flange, reducing the risk of leakage.

[0007] As a preferred option, weather-resistant sealant is applied to the overlapping joints, end joints, and bolt hole gaps of the box culvert body. This sealant precisely fills the gaps in key connection points of the box culvert body, including the gaps at overlapping joints, end joints, and bolt hole gaps, further enhancing the sealing effect. Furthermore, the weather-resistant sealant possesses excellent anti-aging and high / low temperature resistance, maintaining its sealing function for a long time and preventing seal failure due to environmental changes, thus improving the durability and reliability of the box culvert.

[0008] As a preferred option, the outer wall of the box culvert is coated with an epoxy resin anti-corrosion layer. This prevents the corrugated steel plates from rusting and being damaged due to long-term exposure to the damp underground environment, extends the service life of the box culvert, reduces later maintenance costs, and ensures the structural safety of the box culvert.

[0009] As a preferred embodiment, the corrugated roof slab has a manhole opening at its top. A concrete filling area surrounds the manhole opening above the corrugated roof slab. Above the concrete filling area is a cast-in-place reinforced steel slab reinforcing plate that covers the manhole opening. Above the cast-in-place reinforced steel slab reinforcing plate is a brick manhole cylinder. The top of the brick manhole cylinder is a cast-in-place manhole opening reinforcing plate, and the top of the manhole opening is covered with a manhole cover. The manhole opening provides a convenient passage for later inspection and maintenance of the box culvert, facilitating personnel entry into the box culvert to investigate problems. The concrete filling area and the cast-in-place reinforced steel slab reinforcing plate enhance the structural strength of the opening in the corrugated roof slab, preventing deformation and damage around the opening due to concentrated stress. The brick manhole cylinder is easy to construct and has low cost, serving as a vertical passageway for the manhole. The cast-in-place manhole opening reinforcing plate strengthens the area around the manhole opening, preventing damage, while the manhole cover seals the opening, ensuring road traffic safety. Overall, the manhole's function is improved, balancing practicality and safety.

[0010] As a preferred option, the top of the cast-in-place manhole reinforcement slab is equipped with a fall-prevention net, and the brick-built manhole cylinder is connected to a rainwater connection pipe. The fall-prevention net can prevent people and objects from falling into the inspection manhole in the event of accidental loss or damage to the manhole cover, thus avoiding safety accidents and further improving the safety of the inspection manhole. The rainwater connection pipe can introduce rainwater from the road surface or surrounding area into the culvert, improving the drainage efficiency of the culvert, preventing rainwater from accumulating on the road surface or ground, improving the drainage function of the culvert, and enhancing its ability to meet the drainage needs of municipal and highway systems.

[0011] As a preferred embodiment, the outer end of the connecting outer flange is provided with a matching upward bending flange, and the fixing screw is installed and fixed at the bending flange. The upward bending flange provides a stable installation support foundation for the fixing screw, and at the same time, the bending flange can enhance the overall performance of the connecting outer flange and the fluid cement-soil layer, thereby improving the reliability of the overall box culvert structure.

[0012] This utility model has the following beneficial effects: Easy installation: The box culvert body adopts the splicing method of "flanged edge + screw", which eliminates the need for pouring a large amount of concrete on site and shortens the construction period.

[0013] The multi-layered foundation support structure, consisting of a milled material cushion layer, a concrete foundation layer, and a fluidized cement-soil layer, provides all-round support for the box culvert, reducing settlement and deformation. L-shaped fixing bolts are wrapped and fixed inside the fluidized cement-soil layer, enhancing the stability of the box culvert body. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram of adjacent corrugated top plates; Figure 3 for Figure 1 Enlarged structural diagram at point A; Figure 4 for Figure 1 Enlarged structural diagram at point B; Figure 5 This is a structural diagram of adjacent corrugated base plates; Figure 6 This is a schematic diagram of the structure at the opening of the inspection well; In the diagram: 1. Road surface layer; 2. Backfill sand and gravel layer; 3. Corrugated top plate; 4. Corrugated side plate; 5. Corrugated bottom plate; 6. Flowable cement-soil layer; 7. Concrete foundation layer; 8. Milled material cushion layer; 9. Fixing bolt; 10. Connecting outer flange; 11. Installing flange; 12. Connecting inner flange; 13. Fixing flange; 14. Sealing gasket; 15. Concrete filling area; 16. Cast-in-place reinforced steel plate with top opening reinforcement plate; 17. Brick manhole; 18. Cast-in-place manhole opening reinforcement plate; 19. Manhole cover; 20. Fall protection net; 21. Rainwater connection pipe; 22. Inspection manhole opening. Detailed Implementation

[0015] The present invention will be further described below with reference to the embodiments.

[0016] Example 1, as Figures 1 to 6As shown, this utility model is a construction structure for a corrugated steel box culvert, including a box culvert body. The box culvert body includes a corrugated top plate 3, corrugated side plates 4, and a corrugated bottom plate 5. The upper inner side of the corrugated side plate 4 is provided with an installation flange 11 attached to the lower inner side of the corrugated top plate 3. The lower outer side of the corrugated side plate 4 and the outer sides of both ends of the corrugated bottom plate 5 are provided with mutually cooperating connecting flanges 10. An L-shaped fixing screw 9 is fixed on the connecting flange 10. A concrete foundation layer 7 supporting the corrugated bottom plate 5 is provided below it. A milled material pad layer 8 is provided below the concrete foundation layer 7. A fluidized cement-soil layer 6 covering the fixing screw 9 and the connecting flange 10 is provided above the concrete foundation layer 7. A backfilled sand and gravel layer 2 is provided on the outer side of the box culvert body above the fluidized cement-soil layer 6. A road surface layer 1 is provided above the backfilled sand and gravel layer 2.

[0017] First, excavate the box culvert foundation pit. Lay a milled material cushion layer 8 at the bottom of the pit. The thickness of the layer is adjusted according to geological conditions, usually 15cm. Compact the layer with a road roller, ensuring a compaction degree of no less than 93%. Tie a reinforcing mesh on top of the milled material cushion layer 8. Then pour the concrete foundation layer 7, with a concrete strength grade no lower than C25. After pouring, cure for 7-14 days to ensure the foundation strength meets the standard. The thickness of the concrete foundation layer 7 is 10cm. Box culvert assembly: First, hoist the corrugated bottom plate 5 above the concrete foundation layer 7 and adjust its position to be centered. Hoist the corrugated side plates 4, aligning the connecting outer flanges 10, and install and fix the L-shaped fixing bolts 9. Hoist the corrugated top plate 3, ensuring that the mounting flanges 11 at the upper end of the corrugated side plates 4 fit against the inner side of the lower end of the corrugated top plate 3. After adjustment, fix it with bolts. Filling and backfilling: Pour fluidized cement soil above the concrete foundation layer 7 and at the bottom of the box culvert body to ensure that the fixing bolts 9 and the connecting outer flanges 10 are completely covered; after the fluidized cement soil has initially set, a fluidized cement soil layer 6 is formed with a thickness of 25cm. Backfill sand and gravel in layers on the outside of the box culvert body, with each backfill layer not exceeding 20cm in thickness and a compaction degree of not less than 96%; lay the road surface layer 1 on top of the backfilled sand and gravel layer 2.

[0018] In Example 2, based on Example 1, the lower outer side of the corrugated side plate 4 and the inner sides of both ends of the corrugated bottom plate 5 are provided with mutually cooperating connecting inner flanges 12. The connecting inner flanges 12 are fixed by bolts. The front and rear ends of the corrugated top plate 3, corrugated side plate 4, and corrugated bottom plate 5 are all provided with fixing flanges 13. When splicing multiple box culvert sections, they are connected by the fixing flanges 13 at the front and rear ends.

[0019] Sealing gaskets 14 are provided at the joints of the flange 11, the inner flange 12, the outer flange 10, and the fixed flange 13. When connecting the plates of the box culvert, sealing gaskets 14 are installed at the joints. The sealing gaskets 14 are water-swellable rubber sealing gaskets.

[0020] Weather-resistant sealant was applied to the overlapping joints, end joints, and bolt hole gaps of the fasteners in the box culvert body. This on-site sealing and anti-corrosion treatment was carried out after the box culvert was installed and before backfilling. Weather-resistant sealant was applied to the overlapping joints of the box culvert structural panels and the bolt hole gaps of the fasteners in the end joints, using a special glue gun.

[0021] The outer walls of the box culvert are coated with an epoxy resin anti-corrosion layer. Carefully inspect the inner and outer surfaces of the structure, and apply an epoxy resin anti-corrosion layer or asphalt coating to the surfaces.

[0022] The corrugated roof slab 3 has a manhole opening 22 at its top. A concrete filling area 15 is located outside the manhole opening 22 above the corrugated roof slab 3. Above the concrete filling area 15 is a cast-in-place reinforced steel slab top opening reinforcement plate 16 that covers the top of the manhole opening 22. Above the cast-in-place reinforced steel slab top opening reinforcement plate 16 is a brick-built manhole cylinder 17. A cast-in-place manhole opening reinforcement plate 18 is located on top of the brick-built manhole cylinder 17. A manhole cover 19 is located on top of the manhole opening of the cast-in-place manhole opening reinforcement plate 18. A fall protection net 20 is located on top of the manhole opening of the cast-in-place manhole opening reinforcement plate 18. A rainwater connection pipe 21 is connected to the brick-built manhole cylinder 17.

[0023] The outer end of the connecting outer flange 10 is provided with an upwardly bent flange that cooperates with each other, and the fixing screw 9 is installed and fixed at the bent flange. Concrete filling area 15 is poured outside the inspection well opening 22 of the corrugated top plate 3. After the concrete solidifies, the reinforcing steel is tied, and then the top opening reinforcement plate 16 of the cast-in-place reinforced steel plate is poured; brick well cylinder 17 is built, and an interface is reserved on the side of the well cylinder and connected to the rainwater connection pipe 21; a cast-in-place well opening reinforcement plate 18 is poured on the top of the brick well cylinder 17, and the fall protection net 20 and well cover 19 are installed.

[0024] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0025] In the description of this utility model, the terms "inner", "outer", "longitudinal", "transverse", "upper", "lower", "top", "bottom", 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 utility model and do not require that this utility model must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

Claims

1. A corrugated steel box culvert construction structure, comprising a box culvert body, the box culvert body including a corrugated top plate (3), corrugated side plates (4) and a corrugated bottom plate (5), characterized in that: The upper inner side of the corrugated side plate (4) is provided with an installation flange (11) attached to the lower inner side of the corrugated top plate (3). The lower outer side of the corrugated side plate (4) and the outer sides of both ends of the corrugated bottom plate (5) are provided with connecting outer flanges (10) that cooperate with each other. An L-shaped fixing screw (9) is fixed on the connecting outer flange (10). A concrete foundation layer (7) supporting it is provided below the corrugated bottom plate (5). A milled material pad layer (8) is provided below the concrete foundation layer (7). A fluid cement soil layer (6) covering the fixing screw (9) and the connecting outer flange (10) is provided above the concrete foundation layer (7). A backfill sand and gravel layer (2) is provided on the outer side of the box culvert body above the fluid cement soil layer (6). A road surface layer (1) is provided above the backfill sand and gravel layer (2).

2. The construction structure of a corrugated steel box culvert according to claim 1, characterized in that: The lower outer side of the corrugated side plate (4) and the inner sides of both ends of the corrugated bottom plate (5) are provided with connecting inner flanges (12) that cooperate with each other. The connecting inner flanges (12) are fixed by bolts. The front and rear ends of the corrugated top plate (3), corrugated side plate (4) and corrugated bottom plate (5) are provided with fixing flanges (13).

3. The construction structure of a corrugated steel box culvert according to claim 2, characterized in that: Sealing gaskets (14) are provided at the joints of the installation flange (11), the connection inner flange (12), the connection outer flange (10), and the fixing flange (13).

4. The construction structure of a corrugated steel box culvert according to claim 1, characterized in that: Weather-resistant sealant was applied to the overlapping joints of the box culvert body, the end joints, and the gaps in the bolt holes of the fasteners.

5. The construction structure of a corrugated steel box culvert according to claim 1, characterized in that: The outer wall of the box culvert is coated with an epoxy resin anti-corrosion layer.

6. The construction structure of a corrugated steel box culvert according to claim 1, characterized in that: The top of the corrugated top plate (3) is provided with a manhole opening (22). A concrete filling area (15) is provided outside the manhole opening (22) above the corrugated top plate (3). A cast-in-place steel plate top opening reinforcement plate (16) is provided above the concrete filling area (15) to cover the top of the manhole opening (22). A brick well cylinder (17) is provided above the cast-in-place steel plate top opening reinforcement plate (16). A cast-in-place well opening reinforcement plate (18) is provided on the top of the brick well cylinder (17). A well cover (19) is provided on the top of the well opening of the cast-in-place well opening reinforcement plate (18).

7. A construction structure for a corrugated steel box culvert according to claim 6, characterized in that: The top of the wellhead of the cast-in-place wellhead reinforcement plate (18) is equipped with a fall prevention net (20), and the brick well cylinder (17) is connected to a rainwater connection pipe (21).

8. The construction structure of a corrugated steel box culvert according to claim 1, characterized in that: The outer end of the connecting outer flange (10) is provided with an upward bending flange that cooperates with each other, and the fixing screw (9) is installed and fixed at the bending flange.

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