Assembly type box culvert with cast-in-place bottom plate part

Abstract

The utility model relates to a bottom plate part cast-in-place assembly type box culvert which comprises prefabricated side retaining walls, a prefabricated cup opening foundation and a prefabricated arc-shaped cover plate, the bottoms of the prefabricated side retaining walls on the two sides are inserted into the prefabricated cup opening foundation, and the two ends of the prefabricated arc-shaped cover plate are supported at the top ends of the prefabricated side retaining walls on the two sides respectively. The prefabricated cup rabbet foundations on the two sides are oppositely provided with connecting steel bars, the connecting steel bars horizontally extend to the position above the cast-in-place bottom plate from the prefabricated cup rabbet foundations, a cast-in-place cushion layer is poured between the prefabricated cup rabbet foundations on the two sides, and the connecting steel bars are poured in the cast-in-place cushion layer. The box culvert has the advantages that the connecting steel bars are arranged between the prefabricated cup foundations, the cast-in-place bottom plate is provided with the steel bars connected with the connecting steel bars, and the connecting steel bars are poured in the cast-in-place cushion layer, so that the prefabricated cup foundations, the cast-in-place bottom plate and the cast-in-place cushion layer are connected, and the strength of the bottom of the box culvert is enhanced.

Description

Technical Field

[0001] The utility model relates to the field of small assembled reinforced concrete prefabricated components and assembled-cast-in-situ composite structures, in particular to an assembled box-type culvert with a bottom plate portion cast in-situ. Background Art

[0002] With the continuous development of transportation engineering, the scale of highway construction continues to increase. In high-fill roadbed projects, the application of small prefabricated components and prefabricated assembled culverts has become more and more extensive. The rapid assembly of prefabricated segments has gradually become a core issue in the application of prefabricated culvert projects.

[0003] In culvert construction, compared with the traditional method of cast-in-place construction with formwork, prefabrication of small components and on-site assembly has higher construction efficiency and lower cost. However, the precision control during the assembly of prefabricated components is difficult to effectively control, which leads to slightly poor integrity of the culvert after assembly.

[0004] In view of the shortcomings of the existing technology, the utility model designs an assembled box culvert with a cast-in-place bottom plate portion. This solution has the advantages of both assembled structure and cast-in-place structure. The assembly part controls the installation accuracy through the cup-mouth structure and the step structure, and can be widely promoted in engineering. Utility Model Content

[0005] The utility model aims to overcome the deficiencies in the prior art and provide an assembled box-type culvert with a bottom plate portion cast in situ.

[0006] This assembled box-type culvert with a partially cast-in-place bottom plate is arranged on a cast-in-place bottom plate, and is bilaterally symmetrical. The culvert comprises: a prefabricated side retaining wall, a prefabricated cup-shaped foundation, and a prefabricated arc-shaped cover plate. The bottoms of the prefabricated side retaining walls on both sides are inserted into the prefabricated cup-shaped foundation, and the two ends of the prefabricated arc-shaped cover plate are respectively supported on the tops of the prefabricated side retaining walls on both sides.

[0007] The prefabricated cup-shaped foundations on both sides are provided with connecting steel bars facing each other, and the connecting steel bars extend horizontally from the prefabricated cup-shaped foundation to above the cast-in-place bottom plate. A cast-in-place cushion layer is cast between the prefabricated cup-shaped foundations on both sides, and the connecting steel bars are cast in the cast-in-place cushion layer.

[0008] Preferably, horizontal protrusions are symmetrically provided on opposite sides of the two prefabricated cup-mouth foundations, the bottom of the horizontal protrusions is flush with the cast-in-place bottom plate, the top of the horizontal protrusions is lower than the top surface of the prefabricated cup-mouth foundation, and the top surface of the cast-in-place cushion layer is flush with the top surface of the prefabricated cup-mouth foundation.

[0009] Preferably, the cast-in-place base plate is a plain concrete structure or a reinforced concrete structure. When the cast-in-place base plate is a reinforced concrete structure, there are steel bars exposed from the upper surface of the cast-in-place base plate in the cast-in-place base plate, and the steel bars exposed on the upper surface of the cast-in-place base plate are fixedly connected to the connecting steel bars.

[0010] Preferably, a step structure is provided at the top of the prefabricated side retaining wall, and an anti-step structure is provided at the end of the prefabricated arc-shaped cover plate, and the shapes of the step structure and the anti-step structure match.

[0011] Preferably, a groove is provided on the top surface of the prefabricated cup mouth foundation, and a protruding structure is provided on the bottom end of the prefabricated side retaining wall. The shape of the protruding structure matches that of the groove, and the protruding structure is inserted into the groove.

[0012] The beneficial effects of the utility model are:

[0013] 1) The utility model realizes the connection of the prefabricated cup-mouth foundation, the cast-in-place bottom plate and the cast-in-place cushion layer by arranging connecting steel bars between the prefabricated cup-mouth foundations, arranging steel bars connected to the cast-in-place bottom plate, and pouring the connecting steel bars in the cast-in-place cushion layer, thereby enhancing the strength of the bottom of the box culvert.

[0014] 2) The bottom end of the prefabricated side retaining wall of the utility model is inserted into the groove of the prefabricated cup mouth foundation through a protruding structure, and the top end is engaged and connected with the anti-step structure of the end of the prefabricated arc-shaped cover plate through a step structure. The prefabrication and assembly method is simple and easy to control the installation accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of a prefabricated box culvert with cast-in-place bottom slab;

[0016] Figure 2 The exploded view of the fabricated unit segment of the culvert;

[0017] Figure 3 This is a schematic diagram of the longitudinal extension method of the assembled component of the utility model;

[0018] Figure 4 This is a schematic diagram of the connection between the prefabricated retaining wall and the prefabricated cup foundation;

[0019] Figure 5 Schematic diagram of the connection between prefabricated retaining wall and prefabricated curved cover plate.

[0020] Explanation of the reference numerals in the accompanying drawings: prefabricated side retaining wall 1, prefabricated cup-shaped foundation 2, prefabricated arc-shaped cover plate 3, cast-in-place cushion layer 4, cast-in-place bottom plate 5, raised structure 11, stepped structure 12, groove 21, connecting steel bars 22, and anti-step structure 31. DETAILED DESCRIPTION

[0021] 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.

[0022] As an example, Figures 1 to 5 As shown, the assembled box-type culvert with a partially cast-in-place bottom plate is arranged on a cast-in-place bottom plate 5, which is a plain concrete structure or a reinforced concrete structure. In this embodiment, the cast-in-place bottom plate 5 is a reinforced concrete structure. The culvert is bilaterally symmetrical and includes: a prefabricated side retaining wall 1, a prefabricated cup-shaped foundation 2, a prefabricated arc-shaped cover plate 3 and a cast-in-place cushion layer 4.

[0023] like Figure 4 As shown, a groove 21 is provided on the top surface of the prefabricated cup-mouth foundation 2, and a protruding structure 11 is provided on the bottom end of the prefabricated side retaining wall 1. The shapes of the protruding structure 11 and the groove 21 match. The bottoms of the prefabricated side retaining walls 1 on both sides are inserted into the prefabricated cup-mouth foundation 2, and the protruding structure 11 is inserted into the groove 21.

[0024] like Figure 5 As shown, the prefabricated side retaining wall 1 is a reinforced concrete component with a trapezoidal cross-section, which is thinner at the upper end and thicker at the lower end. A step structure 12 is provided at the top, and an anti-step structure 31 is provided at the end of the prefabricated arc cover plate 3. The shapes of the step structure 12 and the anti-step structure 31 are matched to control the installation accuracy. The two ends of the prefabricated arc cover plate 3 are respectively supported on the top of the prefabricated side retaining wall 1 on both sides.

[0025] like Figure 1 As shown, horizontal protrusions are symmetrically provided on opposite sides of the two prefabricated cup-mouth foundations 2, the bottom of the horizontal protrusions is flush with the cast-in-place bottom plate 5, and the top of the horizontal protrusions is lower than the top surface of the prefabricated cup-mouth foundation 2, and the prefabricated cup-mouth foundations 2 on both sides are provided with connecting steel bars 22 facing each other, and the connecting steel bars 22 extend from the horizontal protrusions and extend to the top of the cast-in-place bottom plate 5. A cast-in-place cushion layer 4 is cast between the prefabricated cup-mouth foundations 2 on both sides, and the connecting steel bars 22 are cast in the cast-in-place cushion layer 4. The cast-in-place cushion layer 4 is a plain concrete structure and should be cast in one go without leaving any construction joints. The top surface of the cast-in-place cushion layer 4 is flush with the top surface of the prefabricated cup-mouth foundation 2, so the cast-in-place cushion layer 4 extends to the top of the horizontal protrusion, further pressing the prefabricated cup-mouth foundation 2 as a whole onto the cast-in-place bottom plate 5, thereby improving the stability of the bottom of the culvert.

[0026] There are steel bars exposed from the upper surface of the cast-in-place bottom plate 5 in the cast-in-place bottom plate 5. The steel bars exposed from the upper surface of the cast-in-place bottom plate 5 are fixedly connected to the connecting steel bars 22, further strengthening the connection strength between the cast-in-place cushion layer 4, the prefabricated cup-shaped foundation 2 and the cast-in-place bottom plate 5. The culvert has strong integrity after assembly.

[0027] This assembled box-type culvert with a partially cast-in-place bottom plate has the advantages of both assembled and cast-in-place structures. During construction, the cast-in-place bottom plate 5 is first constructed, and part of the steel bars are exposed from the upper surface of the cast-in-place bottom plate 5 for subsequent connection; then the prefabricated cup-mouth foundation 2 is positioned, the connecting steel bars 22 and the exposed steel bars on the upper surface of the cast-in-place bottom plate 5 are tied together, the prefabricated side retaining wall 1 is inserted into the prefabricated cup-mouth foundation 2, and then the cast-in-place cushion layer 4 is poured on the cast-in-place bottom plate 5 until it is flush with the top surface of the prefabricated cup-mouth foundation 2, and finally the prefabricated side retaining wall 1 and the prefabricated curved cover plate 3 are spliced ​​through the step structure 12 and the anti-step structure 31. In the case of waterproofing requirements, during the installation of the prefabricated side retaining wall 1, the prefabricated cup-mouth foundation 2 and the prefabricated curved cover plate 3, flexible water stopping is performed at the joints between the prefabricated side retaining wall 1 and the prefabricated curved cover plate 3, and between the prefabricated side retaining wall 1 and the prefabricated cup-mouth foundation 2.

[0028] like Figure 3 As shown, two left and right prefabricated side retaining walls 1, two prefabricated cup-shaped foundations 2 and a prefabricated arc-shaped cover plate 3 constitute a unit of the assembled box culvert. According to the needs of the project, several units can be continuously extended longitudinally. For situations with waterproofing requirements, wet joints are required at the longitudinal joints during longitudinal extension.

Claims

1. An assembled box culvert with a partially cast-in-place bottom plate, characterized in that: The culvert is set on the cast-in-place bottom plate. The culvert is symmetrical on both sides. The culvert includes: prefabricated side retaining walls, prefabricated cup-shaped foundation and prefabricated arc-shaped cover plate. The bottom of the prefabricated side retaining walls on both sides is inserted into the prefabricated cup-shaped foundation, and the two ends of the prefabricated arc-shaped cover plate are respectively supported on the top of the prefabricated side retaining walls on both sides; The prefabricated cup-shaped foundations on both sides are provided with connecting steel bars facing each other, and the connecting steel bars extend horizontally from the prefabricated cup-shaped foundation to above the cast-in-place bottom plate. A cast-in-place cushion layer is cast between the prefabricated cup-shaped foundations on both sides, and the connecting steel bars are cast in the cast-in-place cushion layer.

2. The assembled box culvert with cast-in-place bottom plate according to claim 1 is characterized in that: Horizontal protrusions are symmetrically arranged on opposite sides of the two prefabricated cup-mouth foundations. The bottom of the horizontal protrusions is flush with the cast-in-place bottom plate, the top of the horizontal protrusions is lower than the top surface of the prefabricated cup-mouth foundation, and the top surface of the cast-in-place cushion layer is flush with the top surface of the prefabricated cup-mouth foundation.

3. The assembled box culvert with cast-in-place bottom plate according to claim 1 is characterized in that: The cast-in-place base slab is a plain concrete structure or a reinforced concrete structure. When the cast-in-place base slab is a reinforced concrete structure, there are steel bars exposed from the upper surface of the cast-in-place base slab in the cast-in-place base slab, and the steel bars exposed on the upper surface of the cast-in-place base slab are fixedly connected to the connecting steel bars.

4. The assembled box culvert with cast-in-place bottom plate according to claim 1, characterized in that: A step structure is provided at the top of the prefabricated side retaining wall, and an anti-step structure is provided at the end of the prefabricated arc-shaped cover plate, and the shapes of the step structure and the anti-step structure match.

5. The assembled box culvert with cast-in-place bottom plate according to claim 1, characterized in that: A groove is arranged on the top surface of the prefabricated cup mouth foundation, and a convex structure is arranged on the bottom end of the prefabricated side retaining wall. The shapes of the convex structure and the groove match, and the convex structure is inserted into the groove.

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