Z-shaped staggered splicing type box culvert

Abstract

The utility model discloses a Z-shaped staggered splicing type box culvert, and belongs to the field of culvert construction. The box culvert body is of a Z-shaped structure; the box culvert body is divided into a middle part, a suspended end and a bearing end; the suspended end is located at the upper half part of one end of the middle part, and the bearing end is located at the lower half part of the other end of the middle part. During splicing, the suspended end of one box culvert is spliced with the bearing end of the other box culvert in a staggered mode. The fabricated staggered splicing type box culvert structure has good compression-resistant and shear-resistant mechanical properties and deformation resistance, conforms to construction cheapness, and is used for solving the technical problem that longitudinal connection between culvert bodies of an existing fabricated box culvert is not stable, so that dislocation or differential settlement is easily caused.

Description

Technical Field

[0001] The utility model belongs to the field of culvert construction and relates to a Z-shaped staggered splicing box culvert. Background Art

[0002] A box culvert is a culvert constructed with reinforced concrete box-shaped pipe sections. It consists of one or more square or rectangular sections, typically made of reinforced concrete or masonry, though reinforced concrete is more widely used. Box culverts are used when the span is less than 4m. Reinforced concrete box culverts are a cheaper alternative to pipe culverts, with the piers, upper and lower plates all cast uniformly. Box culvert construction generally uses cast-in-place construction. A base layer is set in an excavated trench, a concrete cushion is poured, and the processed steel bars are then tied on-site, with the inner and outer formwork supported. Larger box culverts generally begin with the bottom plate and the lower half of the side walls, followed by the upper side wall and top plate reinforcement. The inner and outer formwork are then supported, and the upper half of the side walls and top plate are cast. Once the concrete reaches the design strength, the formwork is removed, and soil is backfilled simultaneously on both sides of the box culvert.

[0003] Prefabricated box culverts, also known as assembled box culverts, are prefabricated reinforced concrete box structures. They offer a rapid construction process, characterized by factory prefabrication and on-site assembly. They are primarily used in projects requiring a short construction period. Using prefabricated box culverts can significantly shorten construction times for these projects. As a structural form of box culvert, prefabricated concrete box culverts play a vital role in modern highway development due to their safety and durability, minimal maintenance costs, and ease of construction.

[0004] Because prefabricated components are used, prefabricated box culverts are not subject to weather restrictions and can be completed at the best possible time. To reduce the weight of prefabricated box culverts, a portion of the base plate is not prefabricated, and the box culvert components are configured as open structures. The modular prefabrication of prefabricated concrete box culverts reduces the weight of the components, simplifies transportation and installation, shortens construction time, reduces traffic disruptions, promotes civilized and green construction, and ultimately ensures that construction is completed as planned. With the development and innovation of technology, prefabricated concrete box culverts will have greater room for development in highway construction in the future and will play an increasingly important role in highway projects. By formulating reasonable dimensions, improving the integration of prefabrication and assembly, and maturing lifting methods, the widespread application of prefabricated concrete components in actual projects will be promoted.

[0005] However, in the past construction and operation of prefabricated box culverts, unstable longitudinal connections between the culvert bodies can easily lead to dislocation or uneven settlement, greatly reducing the mechanical properties and performance of the culvert body. The box culvert corners and other locations are damaged by bumps, resulting in increased subsequent repair costs and affecting the appearance quality.

[0006] Therefore, technicians in this field are in urgent need of an assembled staggered-jointed box culvert with innovative structure, excellent stress mode and stable longitudinal connection performance. Utility Model Content

[0007] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a Z-shaped staggered spliced ​​box culvert, which has good compressive and shear mechanical properties and anti-deformation ability, and is an assembled staggered spliced ​​box culvert structure that is inexpensive to construct, and is used to solve the technical problem that the longitudinal connection between the culvert bodies of the existing assembled box culverts is unstable and easily leads to dislocation or uneven settlement.

[0008] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0009] The utility model provides a Z-shaped staggered splicing box culvert, wherein the structure of the box culvert body is a Z-shaped structure; the box culvert body is divided into a middle part, a suspended end and a supporting end; the suspended end is located in the upper half of one end of the middle part, and the supporting end is located in the lower half of the other end of the middle part.

[0010] In one embodiment, the box culvert further includes an arc-shaped connecting structure, which includes a downward arc-shaped protruding structure provided on the lower end of the suspended end and a downward arc-shaped recessed structure provided on the upper end of the supporting end; the arc-shaped protruding structure and the arc-shaped recessed structure can fit together.

[0011] In one embodiment, a rubber gasket is provided at the connection between the arc-shaped convex structure and the arc-shaped concave structure or is coated with a sealant.

[0012] In one embodiment, the box culvert also includes a mortise and tenon connection structure, which includes a convex tenon and socket column and a concave mortise and socket hole; the convex tenon and socket column is arranged on the connecting surface of the suspended end and the connecting surface in the middle below the suspended end; the concave mortise and socket hole is opened on the connecting surface of the supporting end and the connecting surface in the middle above the supporting end.

[0013] In one embodiment, the mortise and tenon column comprises an upper mortise and tenon column and a lower mortise and tenon column; the upper mortise and tenon column is arranged on the connection surface of the suspended end, and the lower mortise and tenon column is arranged on the connection surface of the middle portion below the suspended end;

[0014] The mortise and tenon socket includes an upper mortise and tenon socket and a lower mortise and tenon socket; the upper mortise and tenon socket is arranged on the middle connecting surface above the supporting end, and the lower mortise and tenon socket is arranged on the connecting surface of the supporting end.

[0015] In one embodiment, shear reinforcement bars are provided inside the tenon and socket column.

[0016] In one embodiment, the structure of the middle portion is a hollow square column structure.

[0017] In one embodiment, the four outer edges of the middle portion are provided with cutting armpit corners.

[0018] In one embodiment, the shape of the suspended end and the shape of the supporting end are U-shaped.

[0019] In one embodiment, the body of the box culvert is composed of a top plate, a bottom plate, and two side walls located between the top plate and the bottom plate; the side walls are in a Z shape.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The utility model provides a Z-shaped staggered splicing box culvert. The structure of the box culvert body is a Z-shaped structure. The Z-shaped structural design enables the box culvert to form a stable overall structure when spliced, thereby enhancing the bearing capacity and stability of the box culvert. The staggered splicing of the suspended end and the supporting end effectively reduces the settlement and dislocation of the structure and improves the deformation resistance of the overall structure. Specifically, the suspended end and the supporting end can form a staggered interlocking structure. This staggered splicing not only increases the contact area between the culvert sections, but also enhances the connection strength between the culvert bodies through physical interlocking. Compared with traditional butt joints or bolted connections, Z-shaped staggered splicing can more effectively resist external loads and internal forces caused by foundation deformation, thereby reducing the possibility of structural settlement and dislocation. The suspended end is located in the upper half of the middle part, while the supporting end is located in the lower half of the middle part. This design allows the suspended end of one box culvert to naturally sit on the supporting end of another box culvert during splicing, forming a stable support structure. The staggered connection of the suspended and supported ends not only increases the contact area between the culverts, but also further enhances the stability of the connection between the culverts through the natural fit under the action of gravity. This design effectively reduces the problem of dislocation caused by unstable connections.

[0022] Furthermore, the downward-facing curved protrusions and recesses increase the contact area between culvert sections, enhancing interfacial friction and significantly improving the stability of the culvert's overall longitudinal connection. This design also further limits lateral displacement of the culvert, providing a strong restraining effect. The combination of the curved protrusions and recesses not only increases the contact area and friction between the culvert sections, but also, through the restraining effect of the circular tongue-and-groove seam, limits lateral displacement between the sections, further enhancing the overall structure's resistance to deformation.

[0023] Furthermore, rubber gaskets can be provided at the connection points between the arc-shaped convex structure and the concave structure or coated with sealant, thereby further enhancing the sealing performance between the culvert sections and preventing leakage problems.

[0024] Furthermore, the convex tenon and socket column can be inserted into the concave mortise and socket hole to form a more solid mechanical connection. The combination of the convex tenon and socket column and the concave mortise and socket hole not only limits the transverse and longitudinal displacement between culvert sections, but also increases the shear strength of the joints, thereby improving the mechanical properties of the box culvert. The modular design of the box culvert makes the installation and splicing process simpler and faster, reducing construction time and cost. The design of the convex tenon and socket column and the concave mortise and socket hole makes the connection between box culverts more precise and solid, reducing the difficulty of construction. Shear steel bars are set inside the convex tenon and socket column to further enhance the shear strength of the joints. In the process of the mortise and tenon structures between culvert sections, the convex tenon structure is equivalent to a force transmission rod structure, which not only limits the transverse and longitudinal displacement between culvert sections, but also improves the mechanical properties of the overall structure.

[0025] Furthermore, the cut armpit corners set on the four outer edges of the square middle end effectively prevent excessive stress concentration, reduce damage caused by bumps during construction, and protect the integrity of the box culvert structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is an overall three-dimensional structural diagram of the Z-shaped staggered splicing box culvert of the present invention;

[0027] Figure 2 This is another overall three-dimensional structural diagram of the Z-shaped staggered splicing box culvert of the present invention;

[0028] Figure 3 This is a front view of the Z-shaped staggered splicing box culvert of the present invention;

[0029] Figure 4 It is a side view of the Z-shaped staggered splicing box culvert of the present utility model;

[0030] Figure 5 This is a schematic diagram of the culvert section connection of the Z-shaped staggered splicing box culvert of the present invention;

[0031] Figure 6 It is a schematic diagram of the cross-sectional arrangement of the socket columns (holes) of the Z-shaped staggered spliced ​​box culvert of the present invention.

[0032] Among them: 1-top plate; 2-bottom plate; 3-side wall; 4-U-shaped suspended front end; 5-U-shaped supporting rear end; 6-upper convex tenon and socket column; 7-lower convex tenon and socket column; 8-cut axillary corner; 9-upper concave mortise and socket hole; 10-lower concave mortise and socket hole. DETAILED DESCRIPTION

[0033] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] The present invention is described in further detail below with reference to the accompanying drawings:

[0036] The utility model provides a Z-shaped staggered splicing box culvert, the core of which lies in its unique Z-shaped staggered splicing structure. The box culvert body is designed in a Z shape, and each section of the box culvert consists of a middle part, a suspended end and a supporting end. The suspended end is located in the upper half of one end of the middle part, and the supporting end is located in the lower half of the other end of the middle part, forming a continuous Z shape. The suspended end is designed at the top of one end of the unit, and the supporting end is located at the bottom of the opposite end, so as to achieve staggered splicing between adjacent units, forming a stable and continuous overall structure, and forming a long-distance box culvert structure through staggered splicing. The Z-shaped structure naturally forms a stable support system, enhances the overall rigidity and bearing capacity of the box culvert, reduces structural deformation caused by uneven foundation settlement, and reduces the possibility of structural settlement and dislocation.

[0037] The connection structure includes a downward arc-shaped protrusion designed at the bottom of the suspended end and a corresponding downward arc-shaped recessed arc-shaped design at the top of the supporting end. The box culvert also includes a mortise and tenon connection structure.

[0038] When two box culvert units are joined, the curved ridges and recesses fit perfectly together, forming a tight and stable interface. Installing a rubber gasket at the joint between the curved ridges and recesses, or applying a layer of sealant before joining, enhances waterproofing and prevents moisture from seeping into the joint gap.

[0039] The mortise and tenon joint structure features a convex tenon-socket column and a concave tenon-socket hole on the connecting surfaces of the suspended and supported ends, respectively, achieving precise docking. This mechanical connection enhances the stability and reliability of the joint, preventing misalignment and loosening due to external forces. It also simplifies the construction process and improves efficiency.

[0040] The mortise and tenon columns are divided into upper and lower sections, located below the suspended end and the middle section, respectively. The mortise and tenon holes are also divided into upper and lower sections, located above the supporting end and the middle section, respectively. This further improves the precision and stability of the splicing, ensures precise docking between each part, and enhances the load-bearing capacity of the overall structure.

[0041] Shear reinforcement is added inside the tenon and socket column to enhance its shear resistance, improve the resistance of the splicing structure to shear force, prevent splicing failure caused by shear damage, and enhance the safety of the overall structure.

[0042] The central structure utilizes a hollow square column with cutout angles 8° on each of the four outer edges, minimizing stress concentration in the box culvert when subjected to load. The U-shaped design of the suspended and supporting ends increases the surface area and stability of the joints. This U-shaped structure enhances the lateral rigidity and load-bearing capacity of the box culvert, preventing deformation and damage caused by lateral forces. It also facilitates positioning and jointing during construction.

[0043] The box culvert body consists of a top plate 1, a bottom plate 2 and two side walls 3. The side walls 3 adopt a Z-shaped design to form an integrated structure with the middle part, the suspended end and the supporting end.

[0044] See also Figure 1 and Figure 2 In one embodiment, a Z-shaped staggered spliced ​​box culvert includes an assembled box culvert body and a connecting structure (socket and tenon structure). The components of the box culvert body are, in order, a U-shaped suspended front end 4, a square middle part, and a U-shaped supporting rear end 5. The U-shaped suspended front end 4 is located in the upper half of one end of the square middle part, and the U-shaped supporting rear end 5 is located in the lower half of the other end of the square middle part.

[0045] During splicing, the U-shaped suspended front end 4 of one box culvert is spliced ​​alternately with the U-shaped supporting rear end 5 of another box culvert.

[0046] like Figure 1 and Figure 6As shown, the bottom end of the U-shaped suspended front end 4 is provided with a downward semicircular arc shaped protrusion structure for connecting the front section culvert section. The U-shaped suspended front end 4 is provided with a forward upper mortise and tenon socket column 6 for connecting the front section culvert section. The mortise and tenon socket column has a circular cross section and is provided with shear reinforcement inside. A lower mortise and tenon socket column 7 connected to the front section culvert section is provided near the bottom of one end of the middle of the square. Cutting angles 8 are provided on the four edges of the periphery to reduce structural damage caused by collision and facilitate the installation of external wheels for culvert body socket construction. Figure 2 and Figure 6 As shown, the top of the rear end 5 of the U-shaped support is provided with a downward semicircular arc-shaped recessed structure for connecting the rear culvert section, and the other end of the middle of the square is provided with an upper mortise and tenon socket 9 connected to the rear culvert section near the upper part, and the rear end 5 of the U-shaped support is provided with a lower mortise and tenon socket 10 connected to the rear culvert section for connecting the rear culvert section.

[0047] The upper tenon and socket posts 6 on the connecting surface of the U-shaped overhanging front end 4 and the lower tenon and socket posts 7 on the connecting surface of the square middle are evenly spaced. The upper tenon and socket posts 6 on both connecting surfaces are equal in number and positioned in a corresponding manner. The upper tenon and socket posts 6 on the top connecting surface are equal in number and positioned in a corresponding manner as the lower tenon and socket posts 7 on the bottom connecting surface of the square middle. The lower tenon and socket posts 7 on the connecting surfaces on both sides of the square middle are equal in number and positioned in a corresponding manner.

[0048] The lower mortise and tenon sockets 10 on the connection surface of the rear end 5 of the U-shaped support and the upper mortise and tenon sockets 9 on the connection surface of the middle of the square are evenly spaced. The number of lower mortise and tenon sockets 10 on the two connection surfaces is equal and their positions correspond. The number of lower mortise and tenon sockets 10 on the bottom connection surface is equal to the number of upper mortise and tenon sockets 9 on the top connection surface of the middle of the square, and their positions correspond. The number of upper mortise and tenon sockets 9 on the connection surfaces on both sides of the middle of the square is equal and their positions correspond.

[0049] like Figure 3 and Figure 4 As shown, the horizontal width of the U-shaped suspended front end 4 is equal to the width of the square center, and the height of the U-shaped suspended front end 4 is half the height of the square center. The horizontal width of the U-shaped supporting rear end 5 is equal to the width of the square center, and the height of the U-shaped supporting rear end 5 is half the height of the square center. The longitudinal length of the U-shaped suspended front end 4 is the same as the longitudinal length of the U-shaped supporting rear end 5.

[0050] Preferably, the size and structure of the U-shaped suspended front end 4 are as follows: a reinforced concrete slab structure with a horizontal width of 3.0 m, a height of 1.5 m, a longitudinal length of 1.0 m, and a thickness of 0.3 m.

[0051] Preferably, the U-shaped suspended front end 4 is provided with a downward semicircular arc-shaped protruding structure with a radius of 0.15m, which is used to connect the front culvert section. On the one hand, it can play the role of front and rear overlap support to reduce the settlement and dislocation of the culvert structure. On the other hand, it can increase the contact area between each culvert section, enhance the interface friction, and significantly improve the overall longitudinal connection stability of the culvert. The arc-shaped tongue-and-groove seam can further strengthen the interface connection and effectively limit the lateral displacement of the culvert, playing a good restraining role.

[0052] Preferably, the U-shaped suspended front end 4 is provided with an upper mortise and tenon post 6 extending 0.2m forward, similar to a mortise and tenon joint structure, for connecting the preceding culvert section. The upper mortise and tenon post 6 of the U-shaped suspended front end 4 has a radius of 0.05m and is pre-embedded with high-strength steel bars to enhance its shear strength. During the interlocking of the mortise and tenon joints between the culvert sections, the mortise and tenon structure acts as a dowel rod, limiting lateral and longitudinal displacement between culvert sections while also increasing the shear strength of the joints, significantly enhancing the mechanical properties and practicality of the culvert.

[0053] Preferably, the middle part of the square is a hollow square column structure with a width of 3.0m, a height of 3.0m, a length of 3.0m, a plate thickness of 0.3m, and a water flow area of ​​0.09m 2 The four edges of the culvert body are set with 135° cutting angles 8, a width of 0.15m, and a height of 0.15m to prevent excessive stress concentration and reduce damage during construction.

[0054] Preferably, the structure and dimensions of the U-shaped support rear end 5 are as follows: a reinforced concrete slab structure with a horizontal width of 3.0 m, a height of 1.5 m, a longitudinal length of 1.0 m, and a thickness of 0.3 m.

[0055] Preferably, the rear end 5 of the U-shaped support is provided with a downward semicircular concave structure with a radius of 0.15m for connecting the rear culvert section. The rear end 5 of the U-shaped support is provided with a lower concave mortise and tenon socket 10 0.2m forward, similar to a mortise and tenon structure, for connecting the rear culvert section.

[0056] like Figure 5 As shown, this embodiment connects the U-shaped suspended front end 4 and the upper mortise and tenon socket column 6 thereon of the rear group of Z-shaped staggered spliced ​​box culverts, and the lower mortise and tenon socket column 7 located in the middle of the square below the U-shaped suspended front end 4, respectively, with the U-shaped supporting rear end 5 and the lower mortise and tenon socket hole 10 thereon, and the upper mortise and tenon socket hole 9 located in the middle of the square above the U-shaped supporting rear end 5 of the front group of Z-shaped staggered spliced ​​box culverts. A downward semi-circular arc-shaped protrusion structure is provided at the bottom end of the U-shaped suspended front end 4 of the rear group, and a downward semi-circular arc-shaped recessed structure is provided at the top end of the U-shaped supporting rear end 5 of the front group, which cooperate and connect with each other.

[0057] This embodiment employs semicircular tongue-and-groove joints at the front and rear ends of the prefabricated box culvert, with a raised upper section and a recessed lower end. This not only provides support for the front and rear overlap, reducing settlement and displacement of the culvert structure, but also increases the contact area between culvert sections, enhancing interfacial friction and significantly improving the overall longitudinal connection stability of the culvert. The arc-shaped tongue-and-groove joint further strengthens the interfacial connection and effectively limits lateral displacement of the culvert, providing a strong restraining effect. By providing convex tenon-and-spigot sockets and concave mortise-and-tenon sockets, the convex tenon structure acts as a dowel rod during the interlocking of the mortise and tenon joints between culvert sections. This not only limits lateral and longitudinal displacement between culvert sections but also increases the shear strength of the joints, significantly enhancing the mechanical properties and practicality of the culvert.

[0058] The above content is only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A Z-shaped staggered splicing box culvert, characterized in that: The box culvert body has a Z-shaped structure; the box culvert body is divided into a middle part, a suspended end and a supporting end; the suspended end is located in the upper half of one end of the middle part, and the supporting end is located in the lower half of the other end of the middle part.

2. The Z-shaped staggered box culvert according to claim 1 is characterized in that: The box culvert further includes an arc-shaped connecting structure, which includes a downward arc-shaped protruding structure provided on the lower end of the suspended end and a downward arc-shaped concave structure provided on the upper end of the supporting end; the arc-shaped protruding structure and the arc-shaped concave structure can fit each other.

3. The Z-shaped staggered box culvert according to claim 2 is characterized in that: The connection between the arc-shaped convex structure and the arc-shaped concave structure is provided with a rubber gasket or coated with sealant.

4. The Z-shaped staggered box culvert according to claim 1 is characterized in that: The box culvert also includes a mortise and tenon connection structure, which includes a convex tenon socket column and a concave tenon socket hole; the convex tenon socket column is arranged on the connection surface of the suspended end and the connection surface in the middle below the suspended end; the concave tenon socket hole is opened on the connection surface of the supporting end and the connection surface in the middle above the supporting end.

5. The Z-shaped staggered box culvert according to claim 4 is characterized in that: The mortise and tenon socket column comprises an upper mortise and tenon socket column (6) and a lower mortise and tenon socket column (7); the upper mortise and tenon socket column (6) is arranged on the connection surface of the suspended end, and the lower mortise and tenon socket column (7) is arranged on the connection surface of the middle portion below the suspended end; The mortise and tenon socket comprises an upper mortise and tenon socket (9) and a lower mortise and tenon socket (10); the upper mortise and tenon socket (9) is provided on a connecting surface in the middle portion above the supporting end, and the lower mortise and tenon socket (10) is provided on the connecting surface of the supporting end.

6. The Z-shaped staggered splicing box culvert according to claim 4 is characterized in that: Shear reinforcement bars are provided inside the mortise and tenon column.

7. The Z-shaped staggered box culvert according to claim 1, characterized in that: The structure of the middle portion is a hollow square column structure.

8. The Z-shaped staggered box culvert according to claim 1 or 7, characterized in that: Cutting armpit corners (8) are provided on the four outer edges of the middle portion.

9. The Z-shaped staggered box culvert according to claim 1, characterized in that: The shape of the suspended end and the shape of the supporting end are U-shaped.

10. The Z-shaped staggered box culvert according to claim 1, characterized in that: The body of the box culvert is composed of a top plate (1), a bottom plate (2), and two side walls (3) located between the top plate (1) and the bottom plate (2); the side walls (3) are in a Z-shape.

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