Fabricated bridge and culvert and production method thereof

Abstract

The invention discloses a fabricated bridge and culvert and a production method thereof. The fabricated bridge and culvert comprises an upper half bridge and culvert and a lower half bridge and culvert. The upper half bridge culvert and the lower half bridge culvert are both in an n shape, and after the opening of the upper half bridge culvert and the opening of the lower half bridge culvert are in butt joint, a complete bridge culvert is formed. The edge opening of the lower half bridge culvert is provided with an embedded bolt, the edge opening of the upper half bridge culvert is provided with a reserved through hole, and the embedded bolt is inserted into the reserved through hole and is fixed by installing a nut. The fabricated bridge and culvert is of a split structure, the upper half bridge and culvert and the lower half bridge and culvert are smaller in size and weight compared with a complete bridge and culvert, production, transportation and hoisting are more convenient, the construction cost of the bridge is reduced, and the construction period of the bridge is shortened.

Description

Technical Field

[0001] The invention relates to the field of construction, and in particular to an assembled bridge culvert and a production method thereof. Background Art

[0002] Bridge culverts are an important part used in bridge construction and are reinforced concrete products. At present, bridge construction mainly uses prefabricated bridge culverts, that is, the production and maintenance of bridge culverts are completed in the factory, and then the finished bridge culverts are transported to the construction site for installation. The bridge culverts used in the prior art are mainly complete bridge culverts. This large-sized reinforced concrete product is very heavy and large in size, and it is inconvenient to transport and hoist. Not only does it lead to high transportation and installation costs, but it also limits the construction period of the bridge. Summary of the invention

[0003] The technical problem to be solved by the present invention is that the bridge culvert in the prior art is a complete one-piece reinforced concrete product, which is heavy and bulky, and inconvenient to transport and hoist.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: an assembled bridge culvert, comprising an upper half bridge culvert and a lower half bridge culvert;

[0005] The upper culvert and the lower culvert are both in the shape of a gate, and a complete culvert is formed by butting the openings of the upper culvert and the lower culvert; the edge of the lower culvert is provided with embedded bolts, and the edge of the upper culvert is provided with reserved through holes, and the embedded bolts are inserted into the reserved through holes and fixed with nuts.

[0006] The assembled bridge culvert of the present invention is a split structure. The upper and lower culverts have smaller volume and weight than the complete bridge culvert, and are more convenient to produce, transport and hoist, which is beneficial to reducing the cost of bridge construction and shortening the construction period of bridge construction.

[0007] Generally, during installation, epoxy resin adhesive is sprayed on the joints of the upper culvert and the lower culvert; after the embedded bolts are installed, the reserved through holes are filled with concrete for sealing; the outer surfaces of the upper culvert and the lower culvert are wrapped with polymer modified asphalt waterproof membrane and sprayed with polyurethane waterproof coating.

[0008] In order to make the connection between the upper culvert and the lower culvert more stable, the edges of the upper culvert and the lower culvert are both stepped, and the stepped edges of the upper culvert and the lower culvert are engaged with each other.

[0009] The present invention also provides a method for producing an assembled bridge culvert:

[0010] The upper half of the bridge culvert is produced using a first mold; the first mold comprises a first outer mold, a first inner mold and a hole mold, the first outer mold and the first inner mold respectively match the shapes of the outer surface and the inner surface of the upper half of the bridge culvert, and the hole mold matches the shape of the reserved through hole; a first hole for placing the hole mold is provided at the edge of the first outer mold;

[0011] The steps to produce the upper half of the bridge culvert include:

[0012] Step 101: placing all hole molds in the first hole of the first outer mold, the hole mold is used to form a reserved through hole in the upper half of the culvert;

[0013] Step 102: Install the steel cage and the first inner mold of the upper culvert;

[0014] Step 103: pouring concrete;

[0015] Using a second mold to produce the lower half of the bridge culvert; the second mold includes a second outer mold and a second inner mold, and the second outer mold and the second inner mold respectively match the shapes of the outer surface and the inner surface of the lower half of the bridge culvert;

[0016] The steps to produce the lower half of the bridge culvert include:

[0017] Step 201: placing the steel cage of the lower half of the culvert in the outer formwork, fixing the embedded bolts on the steel cage of the lower half of the culvert, and setting the embedded bolts at reasonable intervals to ensure that the embedded bolts correspond one to one with the reserved through holes in the upper half of the culvert;

[0018] Step 202: Installing a second inner mold;

[0019] Step 203: pouring concrete.

[0020] In order to form a step at the edge of the upper half culvert, the first mold further includes a first step mold, which is L-shaped; in step 101: the first step mold is installed at the edge of the outer mold.

[0021] In the present invention, if the hole mold is fixed in the first hole of the first outer mold, a corresponding fastener needs to be configured. This practice makes the installation and disassembly of the hole mold more troublesome. In order to overcome this defect, the present invention provides another hole mold installation scheme: the first mold also includes a C-shaped plate, the surface of the first step mold is provided with a plurality of second holes, the number of the second holes is consistent with the number of the first holes and the positions are aligned, the end of the hole mold is provided with a radial third hole, and the edge of the first outer mold is provided with an outward folded edge;

[0022] In step 101: insert the hole die into the second hole of the first step die, then insert a wire into the third hole of the hole die to fix the hole die to prevent the hole die from falling, and finally place the first step die on the edge of the first outer die, and the hole die falls into the first hole of the first outer die, and the C-shaped plate is used to clamp and fix the folding edge of the first step die and the first outer die;

[0023] In the above scheme, the hole mold is suspended on the first step mold, and there is no need to configure additional fasteners for the installation of the hole mold; when demolding, it is only necessary to pull out the wire to separate the hole mold from the first step mold, and then remove the first step mold normally, and then remove the hole mold from another direction.

[0024] Furthermore, the first mold also includes a first side mold, a first positioning column is arranged on the surface of the first side mold, an inward folding edge is arranged on the edge of the first inner mold, and the first inner mold is mounted on the first positioning column of the first side mold by the folding edge; the first side mold is used to close both ends of the first outer mold and the first inner mold.

[0025] Similarly, in order to form a step at the edge of the lower half culvert, the second mold further includes a second step mold, the second step mold is L-shaped and provided with a slot, a locking bolt is provided on the surface of the second step mold, and the second inner mold is provided with an inward folding edge;

[0026] In step 202: the slot of the second step mold is inserted into the folded edge of the second inner mold, and then the locking bolt is tightened.

[0027] Furthermore, the second mold further comprises a U-shaped tube, and the second outer mold is provided with positioning hooks, and the number and spacing of the positioning hooks are consistent with the number and spacing of the embedded bolts in the lower half of the culvert;

[0028] In step 201: inserting the embedded bolts and the positioning hooks into the two ends of the U-shaped tube respectively;

[0029] The U-shaped tube has three functions: first, to verify the position of the embedded bolts before pouring concrete. If the U-shaped tube cannot be put on, it proves that the current position of the embedded bolts is incorrect, which can remind workers to make timely adjustments; second, to lock the position of the embedded bolts. During the subsequent concrete pouring process, the embedded bolts will be affected by the impact of concrete and the vibration of the equipment. The embedded bolts covered by the U-shaped tube can ensure that they will not be skewed due to these influences; third, to protect the threaded area of ​​the embedded bolts to avoid the threaded area of ​​some embedded bolts from adhering to the concrete during the concrete pouring process, ensuring that the subsequent nuts can be installed smoothly.

[0030] Furthermore, the second mold also includes a second side mold, a second positioning column is arranged on the surface of the second side mold, and the second inner mold is mounted on the second positioning column of the second side mold by a folding frame; the second side mold is used to close both ends of the second outer mold and the second inner mold.

[0031] Beneficial effects: (1) The prefabricated bridge culvert of the present invention is a split structure. The upper and lower culverts have smaller volume and weight than the complete culvert. The production, transportation and hoisting are more convenient, which is conducive to reducing the cost of bridge construction and shortening the construction period of bridge construction. (2) The prefabricated bridge culvert of the present invention sets the edges of the upper and lower culverts into a stepped shape. The stepped edges of the upper and lower culverts bite each other, making the assembled bridge culvert more stable. (3) The production method of the prefabricated bridge culvert provided by the present invention suspends the hole mold in the first mold on the first step mold, and there is no need to configure additional fasteners for the installation of the hole mold, making the installation and demoulding of the hole mold more convenient. (4) The production method of the prefabricated bridge culvert provided by the present invention is equipped with a U-shaped tube to simultaneously realize the positioning, fixing and protection of the embedded bolts, thereby improving the quality of the finished lower culvert and facilitating assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a cross-sectional view of the prefabricated bridge culvert of Example 1.

[0033] Figure 2 It is a three-dimensional diagram of the first mold in Example 2.

[0034] Figure 3 It is a stereoscopic view of the first outer mold in Example 2.

[0035] Figure 4 It is a stereoscopic view of the first inner mold in Example 2.

[0036] Figure 5 It is a three-dimensional diagram of the hole mold in Example 2.

[0037] Figure 6 It is a three-dimensional diagram of the first step mold in Example 2.

[0038] Figure 7 It is a three-dimensional view of the first side mold in Example 2.

[0039] Figure 8 It is a production process diagram of the upper half culvert in Example 2 (one).

[0040] Fig. 9 It is the production process diagram of the upper half culvert in Example 2 (the second one).

[0041] Fig.10 It is a three-dimensional diagram of the second mold in Example 2.

[0042] Fig.11 It is a stereoscopic view of the second outer mold in Example 2.

[0043] Fig.12 It is a three-dimensional diagram of the second step mold in Example 2.

[0044] Fig.13 It is a three-dimensional view of the second side mold in Example 2.

[0045] Fig.14 It is a production process diagram of the lower half culvert in Example 2 (one).

[0046] Fig.15 It is the production process diagram of the lower half culvert in Example 2 (the second one).

[0047] Fig.16 It is the production process diagram of the lower half culvert in Example 2 (third).

[0048] Fig.17 It is the production process diagram of the lower half culvert in embodiment 2 (fourth).

[0049] Fig.18 It is the production process diagram of the lower half culvert in Example 2 (the fifth).

[0050] Among them: 100, upper half of the culvert; 110, reserved through hole; 200, lower half of the culvert; 210, embedded bolts; 300, first mold; 310, first outer mold; 311, first hole; 320, first inner mold; 330, hole mold; 340, first step mold; 341, second hole; 350, C-shaped plate; 360, first side mold; 361, first positioning column; 370, wire; 400, second mold; 410, second outer mold; 411, positioning hook; 420, second inner mold; 430, second step mold; 431, slot; 432, locking bolt; 440, U-shaped tube; 450, second side mold; 451, second positioning column; 500, steel cage. DETAILED DESCRIPTION

[0051] The present invention is further described in detail below in conjunction with specific implementation modes.

[0052] Example 1

[0053] like Figure 1 As shown, the assembled culvert of this embodiment includes an upper culvert 100 and a lower culvert 200; the upper culvert 100 and the lower culvert 200 are both in a gate shape, and the openings of the upper culvert 100 and the lower culvert 200 are butt-jointed to form a complete culvert; the lower culvert 200 is provided with embedded bolts 210 at the edge, and the upper culvert 100 is provided with reserved through holes 110 at the edge, and the embedded bolts 210 are inserted into the reserved through holes 110 and fixed with nuts.

[0054] During installation, epoxy resin adhesive is sprayed on the interface between the upper culvert 100 and the lower culvert 200; after the embedded bolts 210 are installed, the reserved through holes 110 are filled with concrete for sealing; the outer surfaces of the upper culvert 100 and the lower culvert 200 are wrapped with polymer modified asphalt waterproof membrane and sprayed with polyurethane waterproof coating.

[0055] In order to make the connection between the upper culvert 100 and the lower culvert 200 more stable, the edges of the upper culvert 100 and the lower culvert 200 are both stepped, and the stepped edges of the upper culvert 100 and the lower culvert 200 are engaged with each other.

[0056] The assembled bridge culvert of this embodiment is a split structure. The upper culvert 100 and the lower culvert 200 have a smaller volume and weight than a complete bridge culvert, and are more convenient to produce, transport and hoist, which is conducive to reducing the cost of bridge construction and shortening the construction period of bridge construction.

[0057] Example 2

[0058] This embodiment provides a method for producing the upper half culvert 100 and the lower half culvert 200 in Embodiment 1.

[0059] 1. Production method of upper half bridge culvert 100

[0060] Production of upper half bridge culvert 100 uses Figure 2 The first mold 300 shown; the first mold 300 includes a first outer mold 310, a first inner mold 320, a hole mold 330, a first step mold 340, a C-shaped plate 350 and a first side mold 360, as shown Figure 3 and Figure 4 As shown, the first outer mold 310 and the first inner mold 320 respectively match the shapes of the outer surface and the inner surface of the upper half culvert 100. The first outer mold 310 is provided with a slope near the edge for forming an outward convex edge. The slope is provided with a first hole 311 in a vertical direction for placing the hole mold 330. The edge of the first outer mold 310 is provided with an outward folded edge, and the edge of the first inner mold 320 is provided with an inward folded edge.

[0061] like Figure 5 As shown, the hole mold 330 includes two end cylinders that are thin at the top and thick at the bottom. The hole mold 330 matches the shape of the reserved through hole 110. The upper end of the hole mold 330 is provided with a radial third hole, and the third hole is used to pass the iron wire 370.

[0062] like Figure 6 As shown, the first step mold 340 is L-shaped, and a plurality of second holes 341 are arranged on the surface of the first step mold 340. The number of the second holes 341 is consistent with the number of the first holes 311 and the positions are aligned.

[0063] like Figure 7As shown, the first side mold 360 is in a flat plate shape, and a first positioning column 361 is provided on the surface of the first side mold 360 . The first side mold 360 is used to close both ends of the first outer mold 310 and the first inner mold 320 .

[0064] The production steps of upper half bridge culvert 100 are as follows:

[0065] Step 101: Figure 2 and Figure 8 As shown, the upper end of the hole die 330 is inserted into the second hole 341 of the first step die 340, and then the iron wire 370 is inserted into the third hole of the hole die 330 to fix the hole die 330 to prevent the hole die 330 from falling. Finally, the first step die 340 is placed on the edge of the first outer die 310, and the hole die 330 falls into the first hole 311 of the first outer die 310. The C-shaped plate 350 is used to clamp and fix the first step die 340 and the folded edge of the first outer die 310;

[0066] Step 102: Fig. 9 As shown, the first side form 360 is located at the end of the first outer form 310, the steel cage 500 of the upper half culvert 100 is placed in the first outer form 310, and then the first inner form 320 is mounted on the first positioning column 361 of the first side form 360 through its own folding edge;

[0067] Step 103: pouring concrete.

[0068] When demoulding the upper half of the culvert 100, you only need to pull out Fig. 9 The iron wire 370 in the hole mold 330 can be used to separate the hole mold 330 from the first step mold 340, and then the first step mold 340 can be taken off normally, and then the hole mold 330 can be taken off from the bottom.

[0069] 2. Production method of lower half bridge culvert 200

[0070] Production of lower half bridge culvert 200 uses Fig.10 The second mold 400 shown; the second mold 400 includes a second outer mold 410, a second inner mold 420, a second stepped mold 430, a U-shaped tube 440 and a second side mold 450, as Fig.10 and Fig.11 As shown, the second outer mold 410 and the second inner mold 420 match the shapes of the outer surface and the inner surface of the lower half culvert 200, respectively. The outer side of the second outer mold 410 is provided with a positioning hook 411, and the number and spacing of the positioning hooks 411 are consistent with the number and spacing of the embedded bolts 210 in the lower half culvert 200; the second inner mold 420 is provided with an inward folding edge. For easy observation, Fig.10 The second step mold 430 on the right side is hidden and the embedded bolts 210 are additionally drawn.

[0071] like Fig.12As shown, the second step mold 430 is L-shaped and is provided with a slot 431 , and a locking bolt 432 is provided on the surface of the second step mold 430 .

[0072] like Fig.13 As shown, the second side mold 450 is in a flat plate shape, and a second positioning column 451 is provided on the surface of the second side mold 450 . The second side mold 450 is used to close both ends of the second outer mold 410 and the second inner mold 420 .

[0073] The production steps of the lower half bridge culvert 200 are as follows:

[0074] Step 201: Fig.14 As shown, the second outer mold 410 and the second side mold 450 are placed, and the second side mold 450 is located at the end of the second outer mold 410;

[0075] Step 202: Fig.15 As shown, the steel cage 500 of the lower half culvert 200 is placed in the outer mold, and the embedded bolts 210 are fixed on the steel cage 500 of the lower half culvert 200. The embedded bolts 210 should be reasonably spaced to ensure that the embedded bolts 210 correspond to the reserved through holes 110 in the upper half culvert 100 one by one; then the second inner mold 420 is mounted on the second positioning column 451 of the second side mold 450 by using its own folding edge;

[0076] Step 203: Fig.16 As shown, insert the two ends of the U-shaped tube 440 into the embedded bolts 210 and the positioning hooks 411 respectively; if the U-shaped tube 440 cannot be put on, it proves that the current position of the embedded bolts 210 is incorrect, and the position of the embedded bolts 210 must be readjusted to ensure that the U-shaped tube 440 can be put on;

[0077] Step 204: Fig.17 As shown, the concrete is poured to the current highest position and vibrated to make it dense. At this time, the lower half of the culvert 200 does not have a stepped edge.

[0078] Step 205: Fig.18 As shown, the slot 431 of the second stepped mold 430 is inserted into the folded edge of the second inner mold 420, and then the locking bolt 432 is tightened;

[0079] Step 206: Continue pouring concrete to obtain the lower half culvert 200 with a stepped edge.

[0080] In step 203, the U-shaped tube 440 has three functions: first, before pouring concrete, the position of the embedded bolt 210 is forced to be checked. If the U-shaped tube 440 cannot be put on, it proves that the current position of the embedded bolt 210 is incorrect, which can remind the workers to make timely adjustments; second, the position of the embedded bolt 210 is locked. In the subsequent concrete pouring process, the embedded bolt 210 will be affected by the impact of concrete and the vibration equipment. The embedded bolt 210 covered by the U-shaped tube 440 can ensure that it will not be skewed due to these influences; third, the threaded area of ​​the embedded bolt 210 is protected to prevent the threaded area of ​​part of the embedded bolt 210 from adhering to the concrete during the concrete pouring process, thereby ensuring that the subsequent nut can be installed smoothly.

[0081] Although the embodiments of the present invention are described in the specification, these embodiments are only for reference and should not limit the protection scope of the present invention. Various omissions, substitutions and changes within the scope of the present invention should be included in the protection scope of the present invention.

Claims

1. A prefabricated bridge culvert, characterized in that: It includes the upper culvert and the lower culvert; The upper culvert and the lower culvert are both in the shape of a gate, and a complete culvert is formed by butting the openings of the upper culvert and the lower culvert; the edge of the lower culvert is provided with embedded bolts, and the edge of the upper culvert is provided with reserved through holes, and the embedded bolts are inserted into the reserved through holes and fixed with nuts.

2. The assembled bridge culvert according to claim 1, characterized in that: After the embedded bolts are installed, the reserved through holes are filled with concrete for sealing.

3. The assembled bridge culvert according to claim 1 is characterized in that: The edges of the upper culvert and the lower culvert are both stepped, and the stepped edges of the upper culvert and the lower culvert are engaged with each other.

4. A method for producing a prefabricated bridge and culvert according to claim 3, characterized in that: The upper half of the bridge culvert is produced using a first mold; the first mold comprises a first outer mold, a first inner mold and a hole mold, the first outer mold and the first inner mold respectively match the shapes of the outer surface and the inner surface of the upper half of the bridge culvert, and the hole mold matches the shape of the reserved through hole; A first hole for placing a hole die is provided at the edge of the first outer die; The steps to produce the upper half of the bridge culvert include: Step 101: placing all hole molds in the first hole of the first outer mold; Step 102: Install the steel cage and the first inner mold of the upper culvert; Step 103: pouring concrete; Using a second mold to produce the lower half of the bridge culvert; the second mold includes a second outer mold and a second inner mold, and the second outer mold and the second inner mold respectively match the shapes of the outer surface and the inner surface of the lower half of the bridge culvert; The steps to produce the lower half of the bridge culvert include: Step 201: placing the steel cage of the lower half culvert in the outer mold, and fixing the embedded bolts on the steel cage of the lower half culvert; Step 202: Installing a second inner mold; Step 203: pouring concrete.

5. The method for producing a prefabricated bridge and culvert according to claim 4, characterized in that: The first mold further includes a first step mold, and the first step mold is L-shaped; In step 101: a first stepped mold is installed at the edge of the outer mold.

6. The method for producing a prefabricated bridge and culvert according to claim 5, characterized in that: The first mold further comprises a C-shaped plate, a plurality of second holes are arranged on the surface of the first step mold, the number of the second holes is the same as the number of the first holes and the positions are aligned, a radial third hole is arranged at the end of the hole mold, and an outward folding edge is arranged at the edge of the first outer mold; In step 101: insert the hole mold into the second hole of the first step mold, then insert the iron wire into the third hole of the hole mold to fix the hole mold, and finally place the first step mold on the edge of the first outer mold, and the hole mold falls into the first hole of the first outer mold, and use the C-shaped plate to clamp and fix the folding edge of the first step mold and the first outer mold.

7. The method for producing a prefabricated bridge and culvert according to claim 6, characterized in that: The first mold also includes a first side mold, a first positioning column is arranged on the surface of the first side mold, an inward folding edge is arranged on the edge of the first inner mold, and the first inner mold is mounted on the first positioning column of the first side mold by the folding edge; the first side mold is used to close the two ends of the first outer mold and the first inner mold.

8. The method for producing a prefabricated bridge and culvert according to claim 4, characterized in that: The second mold also includes a second step mold, which is L-shaped and provided with a slot, a locking bolt is provided on the surface of the second step mold, and the second inner mold is provided with an inward folded edge; in step 202: the slot of the second step mold is inserted into the folded edge of the second inner mold, and then the locking bolt is tightened.

9. The method for producing a prefabricated bridge and culvert according to claim 8, characterized in that: The second mold further comprises a U-shaped tube, and the second outer mold is provided with positioning hooks, the number and spacing of the positioning hooks being consistent with the number and spacing of the embedded bolts in the lower half of the culvert; In step 201: insert the embedded bolts and the positioning hooks into the two ends of the U-shaped tube respectively.

10. The method for producing a prefabricated bridge and culvert according to claim 9, characterized in that: The second mold also includes a second side mold, a second positioning column is arranged on the surface of the second side mold, and the second inner mold is mounted on the second positioning column of the second side mold by a folding frame; the second side mold is used to close both ends of the second outer mold and the second inner mold.

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