Large-size box culvert connector structure and construction method

Abstract

The invention relates to the field of civil construction, in particular to a large-size box culvert connector structure and a construction method.The connector structure comprises a first connecting section, a second connecting section and a third connecting section, a first water stop belt and a first steel bar joint are arranged at the part, deviating from the first plug, of the first connecting section; the end, facing the first connecting section, of the newly-entering box culvert is provided with a second water stop belt and a second steel bar joint. A deformable water stop ring is connected between the outer side face of the first connecting section and the outer side face of the new box culvert. By optimizing the connecting structure of the structure position and the construction method, the existing problems are effectively solved.

Description

Technical Field

[0001] The invention relates to the field of civil construction, and in particular to a large-size box culvert interface structure and a construction method. Background Art

[0002] Prefabricated box culverts are a common form of underground pipeline construction. When constructing some shallow underground box culverts, the box culverts are often connected together after the cushion layer is laid directly on the stratum. During the construction of some box culverts, the applicant found that some strata crossed the shallow fault zone. Due to the redistribution of stratum stress in the fault zone after the water level dropped, the box culvert on the upper side of the fault zone experienced partial sinking after construction, resulting in sealing failure and unstable connection of the plug-in section of some box culverts. In some working conditions, the tension failure and unstable connection of the box culvert also occurred, which made the box culvert need major overhaul and maintenance, and some sections even needed to be rebuilt.

[0003] In some working conditions, the applicant arranged conventional box culverts (existing box culverts) on both sides of the shallow fault zone one by one. After reinforcing the stratum between the existing box culverts, a new large-sized box culvert with a relatively large span was placed therein. For the newly placed box culvert, how to reduce the failure of the interface caused by uneven settlement between the new box culvert and the existing box culvert is an urgent problem that needs to be solved.

[0004] Based on this, the applicant proposed a large-size box culvert interface structure and construction method to solve the existing problems. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a large-size box culvert interface structure and a construction method, which effectively solves the existing problems by optimizing the connection structure and construction method of the structural position.

[0006] In order to solve the above problems, the present invention provides a large-size box culvert interface structure, including: a first connecting section, the first connecting section includes a first plug that is plugged into and cooperates with the end of an existing box culvert, and the part of the first connecting section facing away from the first plug is provided with a first waterstop and a first steel bar joint; a newly entered box culvert, the end of the new box culvert facing the first connecting section is provided with a second waterstop and a second steel bar joint; wherein a deformable waterstop ring is connected between the outer side surface of the first connecting section and the outer side surface of the new box culvert.

[0007] Furthermore, the water stop ring is configured as a rubber water stop ring.

[0008] Furthermore, the interface structure includes a steel guard plate, and the steel guard plate cover is arranged on the outside of the water stop ring.

[0009] Furthermore, the new box culvert is provided with a first mounting sinker on the outer side surface facing the edge of the first connecting section, one end of the steel guard plate is connected to the first mounting sinker and pressed against the water stop ring, and the other end overlaps the outer side of the first connecting section.

[0010] Furthermore, the interface structure also includes: A plurality of support rods, which can be connected between the new box culvert and the first connecting section, and the support rods are arranged at intervals along the circumference of the new box culvert; An inner support plate is arranged between the new culvert and the first connecting section, the inner support plate can support the water stop ring, and the inner support plate abuts against the support rod.

[0011] Furthermore, the support rod is configured as an outwardly convex arc rod.

[0012] Furthermore, the new culvert is provided with a first pre-installed block at a position corresponding to the support rod, the first connecting section is provided with a second pre-installed block at a position corresponding to the support rod, and both ends of the support rod are respectively connected to the first pre-installed block and the second pre-installed block.

[0013] Furthermore, the end of the support rod is overlapped on the outer side of the first pre-installed block or the second pre-installed block at the corresponding position, and the interface structure also includes a U-shaped bolt that can be buckled on the support rod.

[0014] The present invention also provides a construction method based on the above-mentioned large-size box culvert interface structure, comprising: S1. Place the first connecting section and the new box culvert into the position to be installed; S2, connecting the first connecting section to the existing box culvert through tensioning construction; S3, box culvert soil cover; S4. Monitor the settlement of the new box culvert relative to the existing box culvert. After three months of soil covering, check whether the settlement of the new box culvert is less than or equal to the set threshold. When the monitored settlement is less than or equal to the threshold, pour concrete connection between the first connection section and the new box culvert.

[0015] Further, in S1, the cushion layer is provided with an avoidance groove at the end of the newly inserted box culvert, and the newly inserted box culvert and the first connecting section are integrally placed at the position to be installed after being connected with the rubber water stop ring; After the first connection section is connected to the existing box culvert, S2 also includes: An inner support plate is arranged on the inner side of the water stop ring, and a plurality of outwardly convex arc-shaped support rods are connected between the new box culvert and the first connecting section, and the inner support plate abuts against the support rods.

[0016] The beneficial effect of the present invention is that the existing problems are effectively solved by optimizing the connection structure and construction method of the structural position. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a structural schematic diagram of the connection position between a new box culvert and an existing box culvert in one embodiment of the present invention.

[0018] Figure 2 for Figure 1 Schematic diagram of the local enlarged structure at point A in the middle.

[0019] Among them: 1. Existing box culvert; 2. New box culvert; 3. First connecting section; 4. First plug; 5. First waterstop; 6. First steel bar joint; 7. Second waterstop; 8. Second steel bar joint; 9. Waterstop ring; 10. Steel guard plate; 11. First installation pedestal; 12. Support rod; 13. Inner support plate; 14. First pre-installed block; 15. Second pre-installed block; 16. U-bolt. DETAILED DESCRIPTION

[0020] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in an exemplary manner in conjunction with the accompanying drawings.

[0021] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0022] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through an intermediate structure, but are only connected to form a whole through a connecting structure. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0024] In the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0025] In the present invention, if Figure 1-2 As shown, a large-size box culvert interface structure is provided for connecting an existing box culvert 1 and a new box culvert 2, comprising: a first connecting section 3, the first connecting section 3 comprising a first plug 4 which is plugged into and cooperates with the end of the existing box culvert 1, and the portion of the first connecting section 3 which is away from the first plug 4 is provided with a first waterstop 5 and a first steel bar joint 6; a new box culvert 2, the end of the new box culvert 2 which faces the first connecting section 3 is provided with a second waterstop 7 and a second steel bar joint 8; wherein a deformable waterstop ring 9 is connected between the outer side surface of the first connecting section 3 and the outer side surface of the new box culvert 2.

[0026] When the present invention is implemented, the cushion layer can be re-leveled and laid at the position where the box culvert is to be placed, and then the new box culvert 2 and the first connecting section 3 are placed, so that the first connecting section 3 is connected to the existing box culvert 1 through steel bar tensioning, and the covering layer is backfilled after the new box culvert 2 is placed. The settlement of the new box culvert 2 and the existing box culvert 1 is monitored. After the settlement of the new box culvert 2 and the existing box culvert 1 is stable and less than the set value, the first connecting section 3 and the new box culvert 2 can be cast and connected. After the casting and connection, the new box culvert 2, the cast body, and the first connecting section 3 are connected together by a water stop strip, which can improve the waterproof effect of the entire box culvert section at the end of the new box culvert 2.

[0027] The interface structure of the present invention has the following advantages when implemented. First, the first connecting section 3 is provided with a first plug 4 that matches the existing box culvert 1, and there is a gap between the first plug 4 and the new box culvert 2, so that the new box culvert 2 and the first connecting section 3 can be conveniently inserted, and it is easy to achieve the end connection of the existing box culvert 1; second, the new box culvert 2 and the first connecting section 3 are provided with a deformable water stop ring 9, which can prevent the box culvert from having water seepage problems here, and can maintain the waterproof ability through the deformation of the water stop ring 9 when the new box culvert 2 and the existing box culvert 1 have uneven settlement, and can also prevent the new box culvert 2 from driving the existing box culvert 1 to move when the uneven settlement occurs, and then the stability of the interface between the existing box culverts 1 can be maintained; third, the new box culvert 2 and the first connecting section 3 adopt the deformable water stop ring 9 for waterproofing, which can increase the vertical size of the new box culvert 2, such as the vertical size of the new box culvert 2 is increased by 1 cm to 5 cm compared with the existing box culvert 1, so that when the new box culvert settles relative to the existing box culvert 1, the top surface of the new box culvert 2 can be kept flush.

[0028] In an embodiment of the present invention, in order to reduce the possibility of interface failure in the area of ​​the new box culvert 2, the length of the new box culvert 2 is preferably greater than the length of the existing box culvert 1. In specific working conditions, the existing box culvert 1 is generally 2 meters or 3 meters long, and the new box culvert 2 can use a large-size box culvert with a length of 8 meters. When the cushion layer is constructed again, the bottom of the interface position of the new box culvert 2 can be reinforced by grouting or pile reinforcement. When the span of the new box culvert 2 is large, multiple new box culverts 2 can be placed at the same time, and the new box culverts 2 are connected by splicing and socketing and tensioning by prestressed steel bars.

[0029] In a preferred embodiment, for the structure of the present invention, more specifically, the water stop ring 9 is configured as a rubber water stop ring 9. For the installation of the rubber water stop ring 9, preferably, both ends of the rubber water stop ring 9 are respectively bonded to the first connection section 3 and the new box culvert 2, or the rubber water stop ring 9 includes two split ring bodies, the two split ring bodies are respectively pre-buried in the first connection section 3 and the new box culvert 2, and the two split ring bodies are connected by bonding or hot melting.

[0030] In a preferred embodiment, a further optimized arrangement for the structure of the present invention is that the interface structure includes a steel guard plate 10 , and the steel guard plate 10 is arranged on the outer side of the water stop ring 9 .

[0031] By adding the steel guard plate 10 , the direct contact between the rubber water-stop ring 9 and the external strata can be reduced, thereby preventing the strata from damaging the rubber water-stop ring 9 .

[0032] In the illustrated embodiment, a further optimized setting for the structure of the present invention is that the new box culvert 2 is provided with a first mounting sinker 11 on the outer side surface facing the edge of the first connecting section 3, one end of the steel guard plate 10 is connected to the first mounting sinker 11 and is pressed against the water stop ring 9, and the other end overlaps the outer side of the first connecting section.

[0033] As shown in the figure, by setting up the first installation sinker 11, the steel guard plate can be conveniently fixed, and by overlapping the other end of the steel guard plate on the side of the first connecting section 3, the steel guard plate 10 can be moved with the new box culvert 2, so that the steel guard plate 10 can move relative to the first connecting section 3, while maintaining the supporting and protective effect of the steel guard plate on the water stop ring 9.

[0034] In a preferred embodiment, the structure of the steel guard plate 10 is referred to the structure of the box culvert shown in the figure. Specifically, the box culvert is a square box culvert, and the steel guard plate 10 adopts a structure of four independent steel guard plates 10. Adjacent steel guard plates are connected by rubber sheets to adapt to the changes at the corners of the box culvert. Alternatively, adjacent steel guard plates 10 are connected by welding.

[0035] In a preferred embodiment, the structure of the present invention is further optimized in that the interface structure further includes: a plurality of support rods 12, which can be connected between the new box culvert 2 and the first connecting section 3, and the support rods 12 are arranged at intervals along the circumference of the new box culvert 2; The inner support plate 13 is disposed between the new box culvert 2 and the first connecting section 3 . The inner support plate 13 can support the water stop ring 9 . The inner support plate 13 abuts against the support rod 12 .

[0036] As shown in the figure, by setting the inner support rod 12, the inner support plate 13 can be supported by the support rod 12, and the inner support plate 13 supports and protects the water stop ring 9, which can prevent the external stratum pressure from passing through the steel guard plate 10 to exert excessive pressure on the water stop ring 9, causing damage to the water stop ring 9, and can also prevent the water stop ring 9 from deforming inward and damaging the first steel bar joint 6 and the second steel bar joint 8. At the same time, by connecting the new box culvert 2 and the first connecting section 3 through the support rod 12, the steel plastic connection of the new box culvert 2 and the first connecting section 3 can also be achieved, thereby maintaining a certain synchronization between the relative settlement between the new box culvert 2 and the first connecting section 3, so as to prevent the relative settlement between the new box culvert 2 and the first connecting section 3 from being too large. Moreover, when the relative settlement between the new box culvert 2 and the first connecting section 3 is too large, the steel plastic deformation of the support rod 12 can also be used to prevent the new box culvert 2 from transmitting excessive stress to the first connecting section 3, thereby preventing the structure between the first connecting section 3 and the existing box culvert 1 and the interface between the existing box culvert 1 from being damaged. Moreover, during concrete pouring, the support rods 12 can also provide a certain reinforcement effect on the steel structure.

[0037] In the illustrated embodiment, a further optimized configuration for the structure of the present invention is that, as shown in the figure, the support rod 12 is configured as an outwardly convex arc rod.

[0038] As shown in the figure, by setting the support rod 12 as an arc-shaped rod, when the new box culvert 2 and the first connecting section 3 move relative to or apart from each other, the deformation of the support rod 12 can be utilized to adapt to the change in the distance between the new box culvert 2 and the first connecting section 3. Moreover, the protruding part of the support rod 12 can abut against the inner support plate 13, so that the inner support plate 13 can be stably abutted by the support rod 12.

[0039] In the illustrated embodiment, a further optimized setting for the structure of the present invention is that the new culvert is provided with a first pre-installed block 14 at the position corresponding to the support rod, the first connecting section is provided with a second pre-installed block 15 at the position corresponding to the support rod, and the two ends of the support rod are respectively connected to the first pre-installed block 14 and the second pre-installed block 15.

[0040] As shown in the figure, the first pre-installed block 14 and the second pre-installed block 15 are configured as embedded components, so that when the ends of the support rod are connected to the first pre-installed block 14 and the second pre-installed block 15 respectively, a stable support connection of the support rod can be achieved.

[0041] In the illustrated embodiment, for the structure of the present invention, a further optimized setting is that the end of the support rod overlaps the outer side of the first pre-installed block 14 or the second pre-installed block 15 at the corresponding position, and the interface structure also includes a U-shaped bolt 16 that can be buckled on the support rod. As shown in the figure, the first pre-installed block 14 and the second pre-installed block 15 are both configured as a rib plate structure, the support rod abuts against the outer side of the rib plate structure, and the U-shaped bolt 16 clamps the support rod to the rib plate structure.

[0042] The present invention also provides a construction method based on the aforementioned large-size box culvert interface structure, comprising: S1, placing the first connecting section 3 and the new box culvert 2 into the position to be installed; S2, connecting the first connecting section 3 to the existing box culvert 1 through tensioning construction; S3, box culvert soil cover; S4. Monitor the settlement of the new box culvert 2 relative to the existing box culvert 1. After three months of soil covering, check whether the settlement of the new box culvert 2 compared to the existing box culvert 1 is less than or equal to a set threshold. When the monitored settlement value is less than or equal to the threshold, pour concrete connection between the first connecting section 3 and the new box culvert 2.

[0043] When pouring concrete, as shown in the figure, the first water stop 5 and the second water stop 7 can be pulled apart in advance, and then the steel cage can be tied between the reserved first steel bar joint 6 and the second steel bar joint 8. It is also possible to achieve a prestressed connection between the new box culvert 2 and the first connection section 3 through prestressed steel bars (preset prestressed steel bar seats in the new box culvert 2 and the first connection section 3, and pre-tension the prestressed steel bars during pouring). After the steel bars are tied, they can be poured from bottom to top in one piece or in sections to connect the new box culvert 2 and the first connection section 3 by pouring in one piece.

[0044] In a preferred embodiment, in S1, the cushion layer is provided with an avoidance groove at the end of the newly inserted box culvert, and the newly inserted box culvert 2 and the first connecting section 3 are integrally placed at the position to be installed after being connected with the rubber water stop ring 9; As shown in the figure, an avoidance groove is set so that during installation, the water stop ring 9 and the steel guard plate 10 are located at the avoidance groove position, thereby reducing the extrusion friction between the steel guard plate 10 and the water stop ring 9 during the process of the first connecting section 3 plugging into the existing box culvert 1.

[0045] After the first connecting section 3 is connected to the existing box culvert 1 , S2 further includes: an inner support plate 13 is arranged on the inner side of the water stop ring 9 , and a plurality of outwardly convex arc-shaped support rods 12 are connected between the new box culvert 2 and the first connecting section 3 , and the inner support plate 13 abuts against the support rods 12 .

[0046] In this way, after the first connecting section 3 is socketed with the existing box culvert 1, the inner support plate 13 can be inserted between the new box culvert 2 and the first connecting section 3 through the steel bar joints, so that the inner support plate 13 is close to the water stop ring 9 to form a support for the water stop ring 9, and then the support rod 12 is installed between the new box culvert 2 and the first connecting section, and the support rod 12 and the inner support plate 13 are welded and connected. In this way, the new box culvert 2 and the first connecting section 3 can be connected and the inner support plate 13 can be supported by multiple support rods 12.

[0047] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0048] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A large-size box culvert interface structure, characterized in that: include: A first connecting section, wherein the first connecting section comprises a first plug that is plugged into and matched with an end portion of an existing box culvert, and a portion of the first connecting section that is away from the first plug is provided with a first water stop and a first steel bar joint; A new box culvert, wherein one end of the new box culvert facing the first connecting section is provided with a second water stop and a second steel bar joint; Wherein, a deformable water stop ring is connected between the outer side surface of the first connecting section and the outer side surface of the new culvert.

2. A large-size box culvert interface structure according to claim 1, characterized in that: The water stop ring is configured as a rubber water stop ring.

3. A large-size box culvert interface structure according to claim 1 or 2, characterized in that: The interface structure comprises a steel guard plate, and the steel guard plate cover is arranged on the outer side of the water stop ring.

4. A large-size box culvert interface structure according to claim 3, characterized in that: The new box culvert is provided with a first mounting sinker on the outer side surface facing the edge of the first connecting section, one end of the steel guard plate is connected to the first mounting sinker and pressed against the water stop ring, and the other end overlaps the outer side of the first connecting section.

5. A large-size box culvert interface structure according to claim 1, characterized in that: The interface structure also includes: A plurality of support rods, which can be connected between the new box culvert and the first connecting section, and the support rods are arranged at intervals along the circumference of the new box culvert; An inner support plate is arranged between the new culvert and the first connecting section, the inner support plate can support the water stop ring, and the inner support plate abuts against the support rod.

6. A large-size box culvert interface structure according to claim 5, characterized in that: The support rod is configured as an outwardly convex arc rod.

7. A large-size box culvert interface structure according to claim 5, characterized in that: The new culvert is provided with a first pre-installed block at a position corresponding to the support rod, the first connecting section is provided with a second pre-installed block at a position corresponding to the support rod, and both ends of the support rod are respectively connected to the first pre-installed block and the second pre-installed block.

8. A large-size box culvert interface structure according to claim 7, characterized in that: The end of the support rod is overlapped on the outer side of the first pre-installed block or the second pre-installed block at the corresponding position, and the interface structure also includes a U-shaped bolt that can be buckled on the support rod.

9. A construction method based on the large-size box culvert interface structure according to any one of claims 1 to 8, characterized in that: include: S1. Place the first connecting section and the new box culvert into the position to be installed; S2, connecting the first connecting section to the existing box culvert through tensioning construction; S3, box culvert soil cover; S4. Monitor the settlement of the new box culvert relative to the existing box culvert. After three months of soil covering, check whether the settlement of the new box culvert is less than or equal to the set threshold. When the monitored settlement is less than or equal to the threshold, pour concrete connection between the first connection section and the new box culvert.

10. The construction method of a large-size box culvert interface structure according to claim 9, characterized in that: In S1, the cushion layer is provided with an avoidance groove at the end of the newly inserted box culvert, and the newly inserted box culvert and the first connecting section are integrally placed at the installation position after being connected with the rubber water stop ring; After the first connection section is connected to the existing box culvert, S2 also includes: An inner support plate is arranged on the inner side of the water stop ring, and a plurality of outwardly convex arc-shaped support rods are connected between the new box culvert and the first connecting section, and the inner support plate abuts against the support rods.

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