Single-hole water diversion box culvert connecting structure

Abstract

The utility model discloses a single-hole box culvert connecting structure which is characterized in that the side wall of an old box culvert is externally connected with a tenon, the tenon is externally wrapped with a waterproof structure and connected with the end of a new box culvert, a steel gate is arranged at the position, close to the end, of the new box culvert, a hole is formed in the connecting position of the old box culvert and the new box culvert, and a hole opening reinforcing ring beam and reinforcing bars are arranged at the hole opening. The old box culvert is provided with a bagged soil cofferdam and a blocking wall at the downstream position of the new box culvert; the waterproof structure comprises a low-foaming PVC plate attached to the outer surface of the tenon and a middle-buried rubber water stop, an externally-attached rubber water stop is further arranged on the outer side of the joint of the tenon and the new box culvert, and single-component polyurethane expansion sealant is further arranged at the joint of the new box culvert and the old box culvert and the corner. According to the connection construction structure, the original box culvert can be guaranteed to be free of flow interruption in the whole construction process, downstream water supply operation is not affected, sustainability of livelihood and related industrial production is guaranteed, and the connection construction structure is simple in construction, reliable in connection and good in waterproof performance.

Description

Technical Field

[0001] The utility model relates to a single-hole culvert connection structure. Background Art

[0002] In municipal engineering, when the underground single-hole water diversion culvert approaches its service life, it needs to face the problem of replacement. However, for some important water passageways, due to their great impact on people's livelihood and social stability, it is impossible to cut off water to form a dry construction environment. Therefore, the replacement of such culverts faces the difficulty of construction in a wet environment. In addition, the water quality in the water diversion culvert must be ensured not to be polluted. Dust, debris, etc. generated in conventional construction operations will cause water quality disasters downstream if they fall into the water, and the connection strength and waterproof performance at the connection need to be ensured. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a single-hole culvert connection structure at the connection section of the old and new structures of an important single-hole water diversion culvert so as to complete the upgrade and transformation of the culvert and ensure the connection strength and waterproof performance at the connection.

[0004] The utility model solves the above technical problem through the following technical solutions: A single-hole culvert connection structure, the single-hole culvert includes an old culvert and a new culvert. It is characterized in that a tenon is externally connected to the side wall of the old culvert, and the tenon is wrapped with a waterproof structure and connected to the end of the new culvert. A steel gate is arranged at a position near the end of the new culvert. A hole is opened at the connection between the old culvert and the new culvert, and a hole mouth reinforcement ring beam is arranged at the hole, and reinforcement is arranged. A bagged soil cofferdam and a plugging wall are arranged at a position where the old culvert is downstream of the new culvert; the waterproof structure includes a low-foaming PVC board pasted on the outer surface of the tenon. There is a splicing seam on the low-foaming PVC board at the end of the tenon. One end of the embedded rubber waterstop is embedded into the tenon, and the other end extends out of the splicing seam of the low-foaming PVC board and is poured into the new culvert. An external pasted rubber waterstop is also arranged on the outside of the connection between the tenon and the new culvert. A one-component polyurethane expansion sealant is also arranged at the connection and the corner between the old and new culverts.

[0005] Further, holes are drilled at intervals along the ring on the bottom plate, top plate and side wall of the old culvert, and planting glue is arranged in the holes. One end of the stress reinforcement extends into the hole, and the other end of the stress reinforcement is poured into one body with the tenon to form a ring-shaped tenon. The diameter of the stress reinforcement is 14 mm, and the interval between adjacent holes is 200 mm.

[0006] Further, a diver and a garbage hoisting port are arranged on the upstream side of the steel gate at a position near the end of the new culvert.

[0007] Further, the cross-section of the tenon is 350 mm * 500 mm. The cross-section of the hole mouth reinforcement ring beam is 350 mm * 350 mm. The thickness of the low-foaming PVC board is 18 - 22 mm.

[0008] The utility model adopts a tenon outside the existing box culvert, and the tenon is wrapped with a low-foaming PVC board and is connected to the newly built box culvert in a socket connection manner. Then, the original pipe wall inside the well (pipe) is broken manually or mechanically to realize the passage between the new and old box culverts, which can effectively avoid the hidden danger of water leakage at the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a plan view of a preferred embodiment of the utility model.

[0010] Figure 2 It is a structural joint diagram of the tenon and the newly built box culvert.

[0011] Figure 3 It is a schematic diagram of the opening of the old box culvert.

[0012] The figures include: old box culvert 1, new box culvert 2, tenon 3, steel gate 4, diver and garbage hoisting opening 5, bagged soil cofferdam 6, plugging wall 7, steel cover plate 8, low-foaming PVC board 9, middle-buried rubber waterstop 10, opening 11, ring beam 12, external pasted rubber waterstop 13, one-component polyurethane expansion sealant 14. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0013] As shown in the figure, it is a single-hole box culvert connection structure. The single-hole box culvert includes an old box culvert 1 and a new box culvert 2. It is characterized in that a tenon 3 is externally connected to the side wall of the old box culvert. The tenon 3 is wrapped with a waterproof structure and is connected to the end of the new box culvert 2. A steel gate 4 is arranged at a position near the end of the new box culvert 2. An opening is made at the connection between the old box culvert 1 and the new box culvert 2. A bagged soil cofferdam 6 and a plugging wall 7 are arranged at a position where the old box culvert 1 is downstream of the new box culvert 2.

[0014] The waterproof structure includes a low-foaming PVC board 9 pasted on the outer surface of the tenon 3. There is a splicing seam on the low-foaming PVC board at the end of the tenon 3. One end of the middle-buried rubber waterstop 10 is embedded in the tenon, and the other end extends out of the splicing seam of the low-foaming PVC board. An external pasted rubber waterstop 13 is also arranged on the outside at the connection between the tenon and the new box culvert. A one-component polyurethane expansion sealant 14 is also arranged at the connection and the corner between the new and old box culverts.

[0015] The thickness of the low-foaming PVC board 9 is preferably 20 mm.

[0016] The utility model uses a low-foaming PVC board to fill the joints, which can effectively prevent moisture and dampness from entering the internal structure joints. Asphalt has good waterproof performance and can prevent moisture from penetrating into the building interior, avoiding water damage and corrosion or damage of the structural materials caused by a humid environment. The middle-buried rubber waterstop acts as a waterstop sheet, cutting off the penetration path of moisture in the structural joint, and effectively avoiding the hidden danger of water leakage at the connection.

[0017] To ensure a reliable connection between the tenon and the low-foam PVC board, when making the tenon, after fixing the low-foam PVC board to the inner side of the tenon template with iron nails, the embedded rubber waterstop passes through the splicing joint of the low-foam PVC board, and then the tenon concrete is poured. After the formwork is removed, the low-foam PVC board can be attached to the concrete surface. Then, a new concrete box culvert is built on the outside of the tenon, and an external pasted rubber waterstop 13 is set on the outside of the connection between the tenon and the new box culvert, and a one-component polyurethane expansion sealant 14 is set at the connection and corner of the new and old box culverts.

[0018] The bottom plate, top plate, and side walls of the old box culvert are reinforced by circumferential rebar planting. The tenon is connected to the bottom plate, top plate, and side walls of the old box culvert through the planted rebar. The bottom plate, top plate, and side walls of the old box culvert are drilled at intervals along the circumference, and rebar planting glue and stress-bearing steel bars are added into the holes. The tenon and the stress-bearing steel bars are cast integrally to form a circumferential tenon. The diameter of the stress-bearing steel bars is 14 mm, and the adjacent stress-bearing steel bars are spaced 200 mm apart.

[0019] After the new concrete box culvert is completed, a steel gate 4, a diver, and a garbage hoisting port 5 are set at the near-end position of the new box culvert 2. The steel gate 4 is closed, and water is injected into the forebay in front of the steel gate of the new box culvert until the water surface is flush with the water surface in the old box culvert 1. The diver cuts the side wall of the old box culvert underwater to form an opening, and then the gate of the lock chamber is gradually opened, and the new and old box culverts are connected for water flow.

[0020] To reinforce the opening 11, after the old box culvert is opened, a hole-reinforcing ring beam 12 is set at the opening 11, and reinforcement is provided. The reinforcement of the ring beam is arranged according to the stress of the opening.

[0021] Two bagged soil cofferdams are constructed downstream of the old box culvert. The top plate of the box culvert between the bagged soil cofferdams is chiseled, and the water is pumped out by a submersible pump. The newly built side wall is connected to the old box culvert by rebar planting to form a permanent plugging structure for the box culvert. After the side wall plugging structure is completed, the bagged soil cofferdams in the chamber are removed. The top plate is covered with a steel pressure cover plate, and the upper part is sealed with a cast-in-place concrete cover plate.

[0022] According to another embodiment of the present invention, for the convenience of construction, a steel gate can be used to replace the bagged soil cofferdam.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0024] Although the specific embodiments of the present utility model have been described above, those skilled in the art should understand that this is only an example, and the protection scope of the present utility model is defined by the appended claims. Without departing from the principle and essence of the present utility model, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present utility model.

Claims

1. A single - hole culvert connection structure, the single - hole culvert includes an old culvert and a new culvert, and is characterized in that The outer side of the side wall of the old culvert is connected with a tenon head, and the waterproof structure wrapped around the tenon head is connected to the end of the new culvert. A steel gate is arranged at the position near the end of the new culvert. A hole is opened at the connection between the old culvert and the new culvert, and a ring beam for orifice reinforcement is arranged at the hole, and reinforcement is provided. A bagged soil cofferdam and a plugging wall are arranged at the position where the old culvert is located downstream of the new culvert; the waterproof structure includes a low-foaming PVC board pasted on the outer surface of the tenon head. There is a splicing seam on the low-foaming PVC board at the end of the tenon head. One end of the embedded rubber waterstop is embedded in the tenon head, and the other end extends out of the splicing seam of the low-foaming PVC board and is then cast in the new culvert. An external pasted rubber waterstop is also arranged on the outer side of the connection between the tenon head and the new culvert. A one-component polyurethane expansion sealant is also arranged at the connection and the corner of the old and new culverts.

2. The single-hole culvert connection structure according to claim 1, characterized in that: Holes are drilled at intervals along the ring on the bottom plate, top plate and side wall of the old culvert. Anchor planting glue is arranged in the holes. One end of the stressed steel bar extends into the holes, and the tenon head is cast integrally with the other end of the stressed steel bar to form a ring-shaped tenon head. The diameter of the stressed steel bar is 14 mm, and the interval between adjacent holes is 200 mm.

3. The single-hole culvert connection structure according to claim 1, characterized in that: A diver and a garbage hoisting port are arranged on the upstream side of the steel gate at the position near the end of the new culvert.

4. The single-hole culvert connection structure according to claim 1, wherein: The cross-section of the tenon head is 350 mm * 500 mm.

5. The single-hole culvert connection structure according to claim 1, characterized in that: The cross-section of the ring beam for orifice reinforcement is 350 mm * 350 mm.

6. The single-hole culvert connection structure according to claim 1, wherein: The thickness of the low-foaming PVC board is 18 - 22 mm.

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