Cup foundation-cover plate type fabricated reinforced concrete prefabricated culvert

Abstract

The utility model relates to a cup foundation-cover plate type fabricated reinforced concrete prefabricated culvert which comprises a side retaining wall, a side retaining wall cup foundation, a cover type bottom plate and a cover type top plate. Concave key grooves are formed in the tops of the side retaining wall cup opening foundations, convex keys are arranged at the bottom ends of the side retaining walls, the convex keys are inserted into the concave key grooves, and the cover type bottom plate is arranged between the two side retaining wall cup opening foundations; two ends of the cover-type top plate are respectively supported at the top ends of the side retaining walls on two sides. The culvert has the advantages that the culvert is formed by splicing the side retaining walls, the side retaining wall cup rabbet foundations, the cover type bottom plate and the cover type top plate, the adjacent side retaining wall cup rabbet foundations and the cover type bottom plate are in butt joint through the corresponding positive and negative step structures, and the side retaining walls and the cover type top plate are in butt joint through the corresponding positive and negative step structures.

Description

Technical Field

[0001] The utility model relates to the field of small assembled reinforced concrete prefabricated components, in particular to a cup-shaped foundation-cover plate type assembled reinforced concrete prefabricated culvert. Background Art

[0002] Culverts are important components of highways, railways and municipal roads. With the development of highway and railway construction technology, the application of small prefabricated components and prefabricated culverts has become more and more extensive. The construction, assembly and joint waterproofing of prefabricated segments have gradually become the core issues in the application of prefabricated culvert engineering.

[0003] Compared with the traditional method of cast-in-place construction, prefabrication of small components and on-site assembly have lower economic costs and higher construction efficiency, but the accuracy control of prefabricated components during assembly and the waterproofing of gaps between components are prominent. The insufficient bearing capacity of the culvert caused by large assembly errors and improper waterproofing measures at the joints are prone to rework problems and are the most common defects of prefabricated culverts.

[0004] Therefore, it is urgent to propose a new assembled reinforced concrete prefabricated culvert to solve the above problems and improve the overall quality of the prefabricated culvert. Utility Model Content

[0005] The utility model aims to overcome the deficiencies in the prior art and provide a cup-mouth foundation-cover plate type assembled reinforced concrete prefabricated culvert.

[0006] The cup-mouth foundation-cover plate type prefabricated reinforced concrete culvert is bilaterally symmetrical and includes several prefabricated unit segments, including side retaining walls, side retaining wall cup-mouth foundations, cover-type bottom plates and cover-type top plates; a concave keyway is provided at the top of the side retaining wall cup-mouth foundation, a convex key is provided at the bottom of the side retaining wall, the convex key is inserted into the concave keyway, and the cover-type bottom plate is provided between the two side retaining wall cup-mouth foundations; two ends of the cover-type top plate are respectively supported on the tops of the side retaining walls on both sides;

[0007] The assembled unit segments are spliced ​​with each other.

[0008] Preferably, the top of the side retaining wall is provided with two steps at the top of the side retaining wall, and the higher step of the two steps at the top of the side retaining wall is arranged on the side facing away from the side retaining wall; three steps of the top plate are symmetrically provided at both ends of the cover-type top plate, and the three steps of the top plate are inverted steps. The highest step of the three steps of the top plate is arranged on the higher step of the two steps at the top of the side retaining wall, the step of the middle height of the three steps of the top plate is arranged on the lower step of the two steps at the top of the side retaining wall, and the lowest step of the three steps of the top plate is arranged on the inner side of the two side retaining walls.

[0009] Preferably, two steps of the cup mouth foundation are symmetrically provided on opposite sides of the cup mouth foundation of the two side retaining walls, and two steps of the bottom plate are provided at the end of the cover-type bottom plate. The two steps of the bottom plate are inverted steps, and the higher steps of the two steps of the bottom plate are placed on the lower steps of the two steps of the cup mouth foundation. The bottom and top of the two steps of the bottom plate and the two steps of the cup mouth foundation are flush.

[0010] Preferably, the bottom width of the side retaining wall is greater than the top width, the opposite surfaces of the side retaining walls on both sides are vertical planes, and the opposite back surfaces are inclined planes; the steel bars in the side retaining wall extend to the two steps and the convex key at the top of the side retaining wall; steel bars are also provided in the cup foundation of the side retaining wall on both sides of the concave key groove.

[0011] Preferably, the connecting seams between the side retaining wall and the side retaining wall cup foundation, between the side retaining wall cup foundation and the cover-type bottom plate, and between the side retaining wall and the cover-type top plate are filled with asphalt hemp fiber.

[0012] Preferably, a plain concrete cushion is poured under the culvert.

[0013] The beneficial effects of the utility model are:

[0014] 1) The culvert of the utility model is assembled by side retaining walls, side retaining wall cup foundations, cover-type bottom plates and cover-type top plates, and the adjacent side retaining wall cup foundations and cover-type bottom plates, and the side retaining walls and cover-type top plates are butted against each other through corresponding positive and negative step structures.

[0015] 2) Both ends of the cover-type roof of the utility model are respectively supported on the top ends of the side retaining walls on both sides. The bottom width of the side retaining walls is greater than the top width. Three steps of the roof are symmetrically arranged at both ends of the cover-type roof. The three steps of the roof are inverted steps and can be directly hoisted and supported by the side retaining walls. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the longitudinal extension method of the assembled reinforced concrete prefabricated culvert unit segment;

[0017] Figure 2 It is a schematic diagram of a prefabricated reinforced concrete culvert installed on a plain concrete cushion;

[0018] Figure 3 This is a schematic diagram of a prefabricated reinforced concrete culvert;

[0019] Figure 4 for Figure 3 A magnified schematic diagram of the middle A area;

[0020] Figure 5 for Figure 3 A magnified schematic diagram of the middle B area;

[0021] Figure 6This is an exploded view of the prefabricated reinforced concrete culvert;

[0022] Figure 7 It is a schematic diagram of the connection between the side retaining wall and the side retaining wall cup foundation;

[0023] Figure 8 Schematic diagram of the joints of prefabricated reinforced concrete culverts.

[0024] Explanation of the reference numerals: side retaining wall 1, side retaining wall cup foundation 2, cover bottom plate 3, cover top plate 4, asphalt hemp fiber 5, convex key 11, two steps on the top of the side retaining wall 12, concave keyway 21, two steps on the cup foundation 22, two steps on the bottom plate 31, three steps on the top plate 41. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the embodiments. The description of the following embodiments is only used to help understand the utility model. It should be pointed out that for ordinary people in this technical field, the utility model can also be modified in some ways without departing from the principle of the utility model, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

[0026] As an example, Figures 1 to 8 As shown, this cup-shaped foundation-cover type prefabricated reinforced concrete culvert is bilaterally symmetrical and includes several prefabricated unit segments, such as Figure 6 As shown, it includes: a side retaining wall 1, a side retaining wall cup foundation 2, a cover-type bottom plate 3 and a cover-type top plate 4; a concave key groove 21 is provided on the top of the side retaining wall cup foundation 2, and a convex key 11 is provided on the bottom end of the side retaining wall 1, and the convex key 11 is inserted into the concave key groove 21. The sizes of the convex key 11 and the concave key groove 21 match, and a joint of appropriate size is left. During the assembly process, the joint is filled with asphalt hemp fiber 5 to form a flexible water-stopping structure.

[0027] like Figure 3 and Figure 7 As shown, the side retaining wall 1 is a trapezoidal structure with a bottom width greater than a top width, the opposite faces of the side retaining walls 1 on both sides are vertical planes, and the opposite back faces are inclined planes; the steel bars in the side retaining wall 1 extend to the two steps 12 and the convex key 11 at the top of the side retaining wall; steel bars are also provided in the cup foundation 2 of the side retaining wall on both sides of the concave key groove 21.

[0028] like Figure 5As shown, the two side retaining wall cup-mouth foundations 2 are symmetrically provided with positive cup-mouth foundation two-step steps 22 on opposite sides, and the end of the cover-type bottom plate 3 is provided with a bottom plate two-step step 31, and the bottom plate two-step step 31 is an inverted step shape, and the cover-type bottom plate 3 is arranged between the two side retaining wall cup-mouth foundations 2; the higher step of the bottom plate two-step step 31 is placed on the lower step of the cup-mouth foundation two-step step 22, and the bottom and top of the bottom plate two-step step 31 and the cup-mouth foundation two-step step 22 are flush, and a joint of appropriate size is left during the assembly process of the side retaining wall cup-mouth foundation 2 and the cover-type bottom plate 3, and the joint is filled with asphalt hemp fiber 5 to form a flexible water-stopping structure.

[0029] like Figure 4 As shown, the top of the side retaining wall 1 is provided with two steps 12 of the top of the side retaining wall in the positive direction, and the higher step of the two steps 12 of the top of the side retaining wall is arranged on the side of the side retaining wall 1 facing away; the two ends of the cover type top plate 4 are symmetrically provided with three steps 41 of the top plate, and the three steps 41 of the top plate are in the shape of inverted steps, and the two ends of the cover type top plate 4 are respectively supported on the top of the side retaining walls 1 on both sides; the highest step of the three steps 41 of the top plate is arranged on the higher step of the two steps 12 of the top of the side retaining wall, and the step of the middle height of the three steps 41 of the top plate is arranged on the lower step of the two steps 12 of the top of the side retaining wall, and the lowest step of the three steps 41 of the top plate is arranged on the inner side of the two side retaining walls 1. During the assembly process of the side retaining wall 1 and the cover type top plate 4, a joint of appropriate size is left, and the joint is filled with asphalt oil linen 5 to form a flexible water-stopping structure.

[0030] like Figure 8 As shown, when assembling the culvert, first position the side retaining wall cup foundation 2, then insert the convex key 11 of the side retaining wall 1 into the concave key slot 21 for fixation; then splice the side retaining wall cup foundation 2 and the cover bottom plate 3 through the positive and negative step structures; finally install the cover top plate 4, and the entire installation process is mainly spliced ​​by on-site hoisting and splicing, with high installation accuracy; fill the joints with asphalt hemp fiber 5 during assembly for flexible water stopping, and the waterproof effect is ideal.

[0031] like Figure 1 and Figure 2 As shown, after the assembly of a single prefabricated unit segment is completed, it can be longitudinally extended according to the project requirements. During the longitudinal extension, grouting and waterproofing treatment are required at the longitudinal joints between the prefabricated unit segments; when the longitudinal extension of the prefabricated unit segments exceeds 3 sections, in order to ensure the integrity of this cup-shaped foundation-cover type prefabricated reinforced concrete culvert, a plain concrete cushion layer of appropriate thickness should be poured under the culvert.

Claims

1. A cup-shaped foundation-cover type prefabricated reinforced concrete culvert, characterized in that: The culvert is bilaterally symmetrical and includes several assembled unit segments, including: side retaining walls, side retaining wall cup foundations, cover bottom plates and cover top plates; a concave keyway is provided at the top of the side retaining wall cup foundation, a convex key is provided at the bottom of the side retaining wall, the convex key is inserted into the concave keyway, and the cover bottom plate is provided between the two side retaining wall cup foundations; the two ends of the cover top plate are respectively supported on the top of the side retaining walls on both sides; The assembled unit segments are spliced ​​with each other.

2. The cup-shaped foundation-cover plate type prefabricated reinforced concrete culvert according to claim 1 is characterized in that: The top of the side retaining wall is provided with two steps at the top of the side retaining wall, and the higher step of the two steps at the top of the side retaining wall is arranged on the side facing away from the side retaining wall; three steps of the top plate are symmetrically provided at both ends of the cover-type top plate, and the three steps of the top plate are inverted steps. The highest step of the three steps of the top plate is arranged on the higher step of the two steps at the top of the side retaining wall, the step of the middle height of the three steps of the top plate is arranged on the lower step of the two steps at the top of the side retaining wall, and the lowest step of the three steps of the top plate is arranged on the inner side of the two side retaining walls.

3. The cup-shaped foundation-cover plate type prefabricated reinforced concrete culvert according to claim 1 is characterized in that: Two steps of the cup-mouth foundation are symmetrically arranged on opposite sides of the cup-mouth foundation of the two side retaining walls, and two steps of the bottom plate are arranged at the end of the cover-type bottom plate. The two steps of the bottom plate are inverted steps. The higher steps of the two steps of the bottom plate are placed on the lower steps of the two steps of the cup-mouth foundation, and the bottoms and tops of the two steps of the bottom plate and the two steps of the cup-mouth foundation are flush.

4. The cup-shaped foundation-cover plate type prefabricated reinforced concrete culvert according to claim 2 is characterized in that: The bottom width of the side retaining wall is greater than the top width, the opposite surfaces of the side retaining walls on both sides are vertical planes, and the opposite back surfaces are inclined surfaces; the steel bars in the side retaining wall extend to the two steps and convex keys at the top of the side retaining wall; steel bars are also provided in the cup foundation of the side retaining wall on both sides of the concave key groove.

5. The cup-shaped foundation-cover plate type prefabricated reinforced concrete culvert according to claim 1 is characterized in that: The connecting seams between the side retaining wall and the side retaining wall cup foundation, between the side retaining wall cup foundation and the cover-type bottom plate, and between the side retaining wall and the cover-type top plate are all filled with asphalt hemp fiber.

6. The cup-shaped foundation-cover plate type prefabricated reinforced concrete culvert according to claim 1 is characterized in that: A plain concrete cushion is poured under the culvert.

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