Highway culvert suitable for drainage and flood prevention of high-fill highway subgrade in mountainous area

Abstract

The utility model discloses a highway culvert suitable for drainage and flood prevention of a high-fill highway roadbed in a mountainous area. The highway culvert comprises a foundation, a culvert body and a culvert opening, the foundations are respectively arranged at the bottom ends of the tunnel body and the tunnel opening; the hole body is arranged at the bottom end of a highway subgrade; the holes are formed in the two ends of the hole body respectively; in the actual construction process of the highway culvert, the foundation and the tunnel body are arranged at proper positions according to design requirements, the tunnel opening is stably connected, the size of the tunnel opening is determined according to the catchment area of a water inlet and the water conservation project amount, meanwhile, the multiple sections of interception structures are arranged at the tunnel opening, and the water conservation project amount of the tunnel opening is increased. The flood season silt accumulation in the culvert is effectively and greatly reduced in the flood season, the smoothness in the culvert is ensured in the non-flood season, the geological safety of the highway subgrade and the surrounding area is further improved, and flood prevention and disaster reduction are achieved.

Description

Technical Field

[0001] The embodiments of the present utility model belong to the technical field of highway culverts, and more specifically, relate to a highway culvert suitable for drainage and flood control of high-fill highway subgrades in mountainous areas. Background Art

[0002] The terrain in mountainous areas is complex and has a large slope. During the construction of first-class highways in mountainous areas, according to the design requirements, frequent excavation, filling, or mountain opening is required, which damages the original stable mountain structure in the mountainous area. At the same time, due to the easy formation of surface runoff during rainfall in mountainous areas, if these water flows are not drained in time, it will have the following negative impacts on the highway subgrade: (1) Water accumulation will soften the soil, reduce the bearing capacity of the soil mass, lead to subgrade instability, and even cause disasters such as landslides and collapses; (2) In cold regions, after water seeps into the subgrade and freezes and expands in winter, the soil mass will become soft again when it melts in spring. This freeze-thaw cycle will gradually damage the subgrade structure; (3) Long-term immersion or scouring of the subgrade slope by water will cause soil loss, exacerbate slope erosion, and affect slope stability; (4) Road surface damage: Water accumulation will penetrate into the road surface structure, reduce the performance of road surface materials, and accelerate road surface damage, such as problems like cracks and potholes. To prevent the occurrence of the above problems, drainage culverts are usually considered in the design of mountain highways.

[0003] In the prior art, a Chinese patent with the document number CN209010998U discloses a culvert structure for disaster prevention in a mountain highway system, which includes an inlet converging flow section, a rapid flow section, and an outlet slow flow section connected in sequence. Among them: the inlet section is a converging flow structure in a U shape and gradually narrowing at the upper stream of the culvert, the rapid flow section is located inside the culvert body and the base is in a U shape, a drop well is provided at the upstream part of the outlet slow flow section, and the width spacing of the outlet slow flow section gradually expands from upstream to downstream.

[0004] Although the culvert structure of the Chinese patent with the document number CN209010998U can restrain and intercept mountain torrents and solid debris by installing a converging flow section at the upper stream of the culvert, during the flood season every year in mountainous areas, a large amount of silt and gravel in the mountain will still be brought into the culvert interior, causing blockage. The greater the rain intensity, the deeper the culvert siltation. After that, a large amount of labor cost and time cost are still required for culvert cleaning operations. Especially for multi-culvert first-class highways in mountainous areas with high drainage requirements, the cleaning resources consumed will increase exponentially. Summary of the Utility Model

[0005] In view of the above deficiencies or improvement requirements of the prior art, the present utility model provides a highway culvert applicable to the drainage and flood control of high-filled highway subgrades in mountainous areas. The size of the culvert opening is determined by the catchment area of the water inlet and the water and soil conservation project volume. At the same time, by arranging multiple sections of intercepting structures at the opening, the accumulation of silt inside the culvert during the flood season is effectively reduced, and the inside of the culvert is ensured to be unobstructed during the non-flood season, further improving the geological safety of the highway subgrade and the surrounding areas and achieving flood control and disaster reduction.

[0006] To achieve the above object, the present utility model provides a highway culvert applicable to the drainage and flood control of high-filled highway subgrades in mountainous areas, including: a foundation, a culvert body, and a culvert opening, where:

[0007] The foundation includes a culvert body foundation and a culvert opening foundation; the culvert body foundations are respectively fixedly arranged on both sides of the bottom end of the culvert body; the culvert opening foundation is arranged at the bottom end of the culvert opening;

[0008] The culvert body includes: culvert abutments, a paved base, and a cover plate; the culvert abutments are respectively arranged on the upper ends of the culvert body foundations on both sides, and square notches adapted to the cover plate are fixedly arranged at the upper ends of two opposite culvert abutments; the paved base is arranged between the culvert abutments and on the upper ends of the culvert body foundations on both sides; the cover plate is arranged on the upper ends of the culvert abutments through the notches on both sides of the culvert abutments;

[0009] The culvert opening includes: an upper culvert opening, a lower culvert opening, and an intercepting component; the upper culvert opening and the lower culvert opening are respectively arranged at both ends of the culvert body, and both are in a flared shape; the intercepting component includes: an intercepting grid and an intercepting low wall. Two intercepting grids are detachably arranged at the connection ends of the upper culvert opening and the lower culvert opening with the culvert body, and the intercepting low wall is arranged outside the upper culvert opening and close to the upper slope of the filled area.

[0010] Further, an intercepting bar with a height of 15 - 25 cm is arranged on the outer side of the upper end of the base of the intercepting low wall.

[0011] Further, a falling rock protection net is arranged outside the intercepting bar. The falling rock protection net includes a plurality of support rods and a wire mesh detachably connected to the plurality of support rods.

[0012] Further, the support rods are connected to the upper slope of the filled area through a plurality of steel wire bolts; the elevation of the support rods is the same as the elevation of the cover plate.

[0013] Further, the size of the wire mesh is 100 mm × 100 mm to 200 mm × 200 mm.

[0014] Further, a plurality of triangular support rib walls are arranged between the base of the intercepting low wall and the intercepting bar.

[0015] Further, the elevation of the base of the intercepting low wall is 25 - 35 cm higher than the elevation of the base of the upper culvert opening.

[0016] Further, the elevation of the base of the upper opening is lower than that of the paving base of the tunnel body connected thereto, and the range is 10-20 cm; the width of the base of the upper opening is 1.8-2.2 m.

[0017] Further, the size of the interception grille is 8 mm×8 mm to 12 mm×12 mm.

[0018] Further, a stepped drop well is provided on the lower slope of the filled area below the lower opening.

[0019] Generally speaking, compared with the prior art, the above technical solutions conceived by the present utility model can achieve the following beneficial effects:

[0020] (1) For the highway culvert of the present utility model, the size of the opening is determined by the catchment area of the water inlet and the water and soil conservation project quantity. At the same time, by arranging multiple sections of interception structures at the opening, the accumulation of silt inside the culvert during the flood season is effectively reduced by a large margin, and the inside of the culvert is ensured to be unobstructed during the non-flood season, further improving the geological safety of the highway subgrade and the surrounding areas, and realizing flood control and disaster reduction.

[0021] (2) For the highway culvert of the present utility model, the foundation of the tunnel body is respectively fixedly arranged on both sides of the bottom end of the tunnel body, and compacted fill is provided between the two foundations of the tunnel body. On the basis of ensuring the stability of the highway culvert, the existing fill is utilized to reduce the consumption of building materials, thereby reducing the construction cost.

[0022] (3) For the highway culvert of the present utility model, by arranging interception structures including an interception grille, an interception low wall and a rockfall protection net, the influence of animals and sundries such as sand and gravel and withered branches on the drainage capacity of the tunnel body is avoided, and the accumulation of silt during the flood season is further reduced. Description of the Drawings

[0023] Figure 1 It is a cross-sectional view of the highway culvert according to the embodiment of the present utility model;

[0024] Figure 2 It is a top view of the highway culvert according to the embodiment of the present utility model;

[0025] Figure 3 It is a cross-sectional view of the tunnel body according to the embodiment of the present utility model;

[0026] Figure 4 It is a front view of the lower opening according to the embodiment of the present utility model;

[0027] Figure 5 It is a top view of the upper opening and the interception low wall according to the embodiment of the present utility model.

[0028] In all the drawings, the same reference numerals denote the same technical features, specifically:

[0029] 1 - Highway subgrade, 2 - Filling area, 3 - Tunnel body foundation, 4 - Entrance foundation, 5 - Culvert abutment, 6 - Paving base, 61 - Support beam, 7 - Cover plate, 8 - Upper entrance, 9 - Lower entrance, 101 - Intercepting grille, 102 - Intercepting low wall. Detailed implementation manners

[0030] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. In addition, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0031] As Figures 1 to 5 shown, an embodiment of the present utility model provides a highway culvert applicable to drainage and flood control of a high-fill highway subgrade in mountainous areas, including: a foundation, a tunnel body and an entrance; the foundation is respectively arranged at the bottom ends of the tunnel body and the entrance; the tunnel body is arranged at the bottom end of the highway subgrade 1; the entrances are respectively arranged at both ends of the tunnel body; during the actual construction process of the highway culvert, the foundation and the tunnel body are arranged at appropriate positions according to the design requirements to stably connect the entrances, and the sizes of the entrances are determined according to the catchment area of the water inlet and the water and soil conservation project volume. At the same time, by arranging multiple sections of intercepting structures at the entrances, the accumulation of silt inside the culvert during the flood season can be effectively reduced, and the inside of the culvert can be ensured to be unobstructed during the non-flood season, further improving the geological safety of the highway subgrade 1 and the surrounding areas and realizing flood control and disaster reduction.

[0032] Specifically, as Figures 1 to 5 shown, the foundation is respectively arranged at the bottom ends of the tunnel body and the entrance, and is used to ensure the stability of the tunnel body and the entrance, and includes a tunnel body foundation 3 and an entrance foundation 4;

[0033] Preferably, the foundation is mainly formed by concrete pouring, and is respectively connected with the tunnel body and the entrance through the embedded steel bars inside it, so as to ensure the structural stability of the highway culvert.

[0034] The tunnel body foundations 3 are respectively fixedly arranged on both sides of the bottom end of the tunnel body, and there is compacted fill between the two tunnel body foundations 3 on both sides, which is used to utilize the existing fill on the basis of ensuring the stability of the highway culvert, reduce the building material consumption, and thus reduce the construction cost.

[0035] The entrance foundation 4 is arranged at the bottom end of the entrance and is used to stably support the entrance.

[0036] Specifically, as Figures 1 to 3As shown, the culvert body is provided at the bottom of the highway subgrade 1, used for stably connecting the culvert entrance to ensure smooth drainage, and it includes: culvert abutments 5, paved base 6 and cover slab 7;

[0037] Preferably, the slope of the culvert body is 2.5% - 3.5%, used for reducing the risk of sediment accumulation.

[0038] The culvert abutments 5 are respectively provided at the upper ends of the two sides of the culvert body foundation 3, and square notches adapted to the cover slab 7 are fixedly provided at the upper ends of the two opposite culvert abutments 5, used for stably connecting the cover slab 7.

[0039] The paved base 6 is provided between the culvert abutments 5 and at the upper ends of the two sides of the culvert body foundation 3, and a number of support beams 61 are arranged inside it, used for ensuring the stability of the paved base 6 and playing a role in support and resistance to scouring.

[0040] The cover slab 7 is provided at the upper end of the culvert abutment 5 through the notches on the two sides of the culvert abutment 5.

[0041] Preferably, both the culvert abutments 5 and the cover slab 7 are precast reinforced concrete products, used for further improving the construction efficiency.

[0042] Preferably, settlement joints are provided at the joints between several culvert abutments 5 and several cover slabs 7 of the culvert body.

[0043] Preferably, a waterproof layer including hot asphalt is laid on the outside of the culvert body.

[0044] Specifically, as Figure 1 , Figure 2 , Figure 4 and Figure 5 shown, the culvert entrances are respectively provided at both ends of the culvert body, used for ensuring stable water inlet and outlet and preventing the culvert body from being blocked, and it includes: upper culvert entrance 8, lower culvert entrance 9 and intercepting components;

[0045] The upper culvert entrance 8 and the lower culvert entrance 9 are respectively provided at both ends of the culvert body, and curb stones are fixedly provided at their upper ends, used for ensuring the stability of the upper culvert entrance 8 and the lower culvert entrance 9.

[0046] Preferably, both the upper culvert entrance 8 and the lower culvert entrance 9 are in the shape of an inverted V, used for increasing the drainage area and slowing down the scouring of the downstream embankment area 2 by the discharged water, and improving safety.

[0047] Preferably, a cut-off wall is provided downward at the end of the base of the upper culvert entrance 8 and the lower culvert entrance 9 far from the culvert body.

[0048] Preferably, the elevation of the base of the upper culvert entrance 8 is lower than the elevation of the paved base 6 of the culvert body connected to it, and the range is 10 - 20 cm, used as a drop well to reduce the sediment accumulation degree of the culvert body.

[0049] Preferably, the base width of the upper opening 8 is 1.8 - 2.2 m to enhance the capacity of the drop well.

[0050] In an alternative embodiment, a stepped drop well is provided on the lower slope of the filled area 2 below the lower opening 9 to further reduce the scouring of the filled area 2 slope by the water flow.

[0051] The interception component includes: an interception grille 101 and an interception low wall 102;

[0052] Preferably, the two interception grilles 101 are detachably arranged at the connection ends of the upper opening 8 and the lower opening 9 with the tunnel body, and the size of the interception grille 101 is 8 mm × 8 mm to 12 mm × 12 mm to prevent animals and sundries such as sand and gravel and dead branches from affecting the drainage capacity of the tunnel body.

[0053] Preferably, the interception low wall 102 is arranged outside the upper opening 8 and close to the upper slope of the filled area 2. The base elevation of the interception low wall 102 is 25 - 35 cm higher than the base elevation of the upper opening 8. At the same time, an interception bar with a height of 15 - 25 cm is provided on the outer side of the upper end of the base to further reduce the silt accumulation during the flood season.

[0054] Preferably, a rockfall prevention net is provided outside the interception bar. The rockfall prevention net includes a number of support rods and a wire mesh detachably connected to the number of support rods to prevent the problem of rockfall on the upper slope of the filled area 2 and enhance the interception capacity at the same time.

[0055] Preferably, the support rods are connected to the upper slope of the filled area 2 through a number of steel wire anchor rods to enhance the structural stability of the rockfall prevention net.

[0056] Preferably, the elevation of the support rods is the same as the elevation of the cover plate 7.

[0057] Preferably, the size of the wire mesh is 100 mm × 100 mm to 200 mm × 200 mm.

[0058] In an alternative embodiment, a number of triangular support rib walls are provided between the base of the interception low wall 102 and the interception bar to ensure the stability of the interception low wall 102 and the rockfall prevention net when impacted by water flow, sediment and stones.

[0059] The working principle of the present utility model is as follows: During the actual construction process, the highway culvert is constructed at a suitable position according to the design requirements, and the size of the culvert opening is determined based on the catchment area of the water inlet and the water and soil conservation project quantity. The construction of the highway culvert is completed through construction steps including construction survey and setting out, foundation excavation, foundation pit acceptance, pouring of the foundation, the culvert body, and the culvert opening, and curing and acceptance. By setting interception structures including an interception grille 101, an interception low wall 102, and a rockfall protection net, the slope of the culvert body, and the base of the drop well structure at the upper culvert opening 8, the internal silt accumulation in the culvert during the flood season can be effectively reduced, and the internal passage of the culvert can be ensured during the non-flood season, realizing flood control and disaster reduction.

[0060] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, such directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If this specific posture changes, the directional indications will also change accordingly.

[0061] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, such descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0062] In this patent, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article or device. Without further limitations, the elements defined by the statement "including..." do not exclude the existence of additional identical elements in the process, method, article or device comprising the said elements.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit it; those skilled in the art can easily understand that the above is only a preferred embodiment of the present utility model and is not used to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A highway culvert suitable for drainage and flood control of high-fill highway subgrade in mountainous areas, characterized in that: include: Foundation, tunnel body and tunnel opening, including: The foundation comprises a tunnel body foundation (3) and a tunnel opening foundation (4); the tunnel body foundation (3) is respectively fixedly arranged on both sides of the bottom end of the tunnel body; the tunnel opening foundation (4) is arranged at the bottom end of the tunnel opening; The tunnel body comprises: a culvert platform (5), a paving base (6) and a cover plate (7); the culvert platform (5) is respectively arranged at the upper ends of the tunnel body foundation (3) on both sides, and the upper ends of the two opposite culvert platforms (5) are fixedly provided with square recesses adapted to the cover plate (7); the paving base (6) is arranged between the culvert platforms (5) and at the upper ends of the tunnel body foundation (3) on both sides; the cover plate (7) is arranged at the upper ends of the culvert platforms (5) through the recesses of the culvert platforms (5) on both sides; The hole opening comprises: an upper hole opening (8), a lower hole opening (9) and an interception component; the upper hole opening (8) and the lower hole opening (9) are respectively arranged at the two ends of the hole body and are both in an eight-shaped shape; the interception component comprises: an interception grille (101) and an interception low wall (102); the two interception grilles (101) are detachably arranged at the connection ends of the upper hole opening (8) and the lower hole opening (9) and the hole body; the interception low wall (102) is arranged outside the upper hole opening (8) and close to the upper slope of the fill area (2).

2. The highway culvert according to claim 1, characterized in that: An interception bar with a height of 15-25 cm is provided on the outer side of the upper end of the base of the interception low wall (102).

3. The highway culvert according to claim 2, characterized in that: An anti-rockfall net is arranged on the outer side of the interception bar, and the anti-rockfall net comprises a plurality of support rods and a wire mesh detachably connected to the plurality of support rods.

4. The highway culvert according to claim 3, characterized in that: The support rod is connected to the upper slope of the fill area (2) via a plurality of steel rope anchor rods; the elevation of the support rod is the same as the elevation of the cover plate (7).

5. The highway culvert according to claim 3, characterized in that: The size of the steel wire mesh is 100mm×100mm to 200mm×200mm.

6. The highway culvert according to claim 4, characterized in that: A plurality of triangular supporting rib walls are provided between the base of the intercepting low wall (102) and the intercepting stop bar.

7. The highway culvert according to any one of claims 1 to 6, characterized in that: The base elevation of the intercepting low wall (102) is 25-35 cm higher than the base elevation of the upper opening (8).

8. The highway culvert according to any one of claims 1 to 6, characterized in that: The base elevation of the upper hole opening (8) is lower than the base elevation of the paved base (6) of the hole body connected thereto, and the range is 10-20 cm; the base width of the upper hole opening (8) is 1.8-2.2 m.

9. The highway culvert according to any one of claims 1 to 6, characterized in that: The interception grid (101) has a size of 8 mm×8 mm to 12 mm×12 mm.

10. The highway culvert according to any one of claims 1 to 6, characterized in that: A stepped waterfall is provided on the lower slope of the fill area (2) below the lower opening (9).

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