A prefabricated water box culvert preparation mold and preparation method

Abstract

The present invention discloses a mold and a method for preparing a prefabricated water box culvert, and belongs to the technical field of water box culvert preparation. A mold for preparing a prefabricated water box culvert comprises an inner mold and an outer mold, wherein the outer mold is sleeved on the outside of the inner mold, and both the outer mold and the inner mold are arranged on a base, and a plurality of forming cylinders for forming openings are arranged between the outer mold and the inner mold, a first fixing structure for fixing the forming cylinder is arranged on the outer mold, and a second fixing structure for fixing the forming cylinder is arranged on the inner mold, and the inner mold and the outer mold are connected by a connecting structure. The mold and the method for preparing a prefabricated water box culvert described in the present invention can solve the problem that the inner openings of the water box culvert prepared by the existing mold are uneven, resulting in stress concentration and reduced durability.

Description

Technical Field

[0001] The invention relates to the technical field of water box culvert preparation, and in particular to a prefabricated water box culvert preparation mold and a preparation method. Background Art

[0002] A water culvert usually refers to an underground passage structure used to drain or guide water across obstacles such as roads and railways. It is an important water conservancy or municipal facility used to allow water to pass smoothly without affecting ground traffic. The structure of a water culvert usually includes an inlet and outlet, a box (or the pipe itself), and necessary ventilation and maintenance facilities. Prefabricated water culverts require reserved array openings, such as Fig.10 As shown. However, when constructing and manufacturing prefabricated water-passing box culverts, there is a phenomenon that the openings on the outside of the box culvert are relatively neat while the openings on the inside are uneven, which leaves a greater safety hazard to the stress performance of the box culvert. Xie Yongjian et al. (2019) found through engineering examples that the box culvert concrete is subjected to the coupling effect of stress and corrosion after cracks occur, which will seriously affect the normal use of the box culvert. Li Zhen et al. (2022) analyzed the actual working conditions of the project through numerical simulation methods and found that the deformation and stress distribution of the box culvert are roughly symmetrical with the center line of the box culvert top plate as the axis. According to the stress and corrosion mechanism of the box culvert, the uneven openings on the inside of the prefabricated water-passing box culvert often lead to uneven stress distribution of the box culvert, and stress concentration is prone to occur on the inside of the box culvert, which in turn leads to concrete cracking. The steel skeleton in the box culvert is exposed to humid air or water, and is subjected to the coupling effect of stress and corrosion, which eventually leads to the shedding of the concrete protective layer and the rusting of the steel bars, which greatly reduces the durability of the prefabricated water-passing box culvert. Therefore, in order to make the stress performance of the box culvert more reasonable and improve the durability of the prefabricated box culvert, a new type of mold is urgently needed to improve the current problems of low precision and uneven array openings. Summary of the invention

[0003] The purpose of the present invention is to provide a prefabricated water box culvert preparation mold and preparation method, so as to solve the problem that the inner openings of the water box culvert prepared by the existing mold are uneven, resulting in stress concentration and reduced durability.

[0004] To achieve the above-mentioned purpose, the present invention provides a prefabricated water culvert preparation mold, including an inner mold and an outer mold, the outer mold is sleeved on the outside of the inner mold, the outer mold and the inner mold are both arranged on a base, a plurality of forming cylinders for forming openings are arranged between the outer mold and the inner mold, a first fixing structure for fixing the forming cylinder is arranged on the outer mold, and a second fixing structure for fixing the forming cylinder is arranged on the inner mold, and the inner mold and the outer mold are connected by a connecting structure.

[0005] Preferably, the first fixing structure includes a first positioning column fixedly arranged on the outer mold, the first positioning column is arranged in a one-to-one correspondence with the molding tube, one end of the first positioning column is inserted into the molding tube, and the first positioning column positions one end of the molding tube close to the outer mold.

[0006] Preferably, the second fixing structure includes a second positioning column fixedly arranged on the inner mold, the second positioning column is arranged in a one-to-one correspondence with the molding tube, one end of the second positioning column is inserted into the molding tube, and the second positioning column positions one end of the molding tube close to the inner mold.

[0007] Preferably, the connecting structure includes a plurality of first connecting plates arranged at the top end of the outer mold and a plurality of second connecting plates arranged at the top end of the inner mold, the first connecting plates correspond to the second connecting plates one by one, and the first connecting plates and the second connecting plates are both provided with through holes for screws to pass through, and the first connecting plates and the second connecting plates are locked and connected by screws and nuts.

[0008] Preferably, the outer mold includes a rectangular first template, one end of the first template is provided with a first folded edge folded outward, a plurality of first connecting holes are evenly arranged on the first folded edge, the other end of the first template is provided with second connecting holes corresponding to the first connecting holes one by one, and adjacent first templates are fixedly connected by first connecting holes, second connecting holes and bolts.

[0009] Preferably, the inner mold includes a rectangular second template and a third template, the second template is spaced apart from the third template, both ends of the second template are provided with arc-shaped forming sections, the forming sections are provided with second folded edges folded inward, and the second folded edges are evenly provided with a plurality of third connecting holes; both ends of the third template are provided with third folded edges bent outward, and the third folded edges are provided with fourth connecting holes corresponding to the third connecting holes one by one, and the second template and the third template are fixedly connected by the third connecting holes, the fourth connecting holes and bolts.

[0010] Preferably, the base is provided with diagonal support rods for supporting the outer mold.

[0011] The method for preparing a prefabricated water box culvert based on the above-mentioned prefabricated water box culvert preparation mold comprises the following steps:

[0012] S1. Place the tied steel cage on the base, vertically place the first first template on the outside of the first side of the steel cage, and make the first positioning column on the first first template correspond to the placement position of the forming tube reserved on the first side of the steel cage one by one; vertically place the second first template on the outside of the second side of the steel cage, and make the first positioning column on the second first template correspond to the placement position of the forming tube reserved on the second side of the steel cage one by one, and fix the first folded edge of the second first template to the first first template with bolts; vertically place the third first template on the outside of the third side of the steel cage, and make the first positioning column on the third first template correspond to the placement position of the forming tube reserved on the second side of the steel cage one by one. A positioning column is corresponding to the position of the forming tube reserved on the third side of the steel cage, and the first folded edge of the third first template is fixedly connected to the second first template by bolts; the fourth first template is vertically placed on the outside of the fourth side of the steel cage, the first positioning column on the fourth first template is corresponding to the position of the forming tube reserved on the fourth side of the steel cage, and the first folded edge of the fourth first template is fixedly connected to the third first template by bolts; the first folded edge of the first first template is fixedly connected to the fourth first template by bolts; the distance between the first template and the steel cage is adjusted, and the first template is fixed to the base;

[0013] S2, placing the forming tubes one by one in the reserved positions of the steel cage, inserting the first positioning column into the first positioning hole at one end of the forming tube, and fitting the end of the forming tube to the first template;

[0014] S3, vertically place the first second template on the outside of the first side surface of the steel cage, insert the second positioning column on the first second template into the second positioning hole at the other end of the forming tube, the end of the forming tube fits with the first second template, and fix the first second template to the base; vertically place the first third template on the outside of the second side surface of the steel cage, insert the second positioning column on the first third template into the second positioning hole at the other end of the forming tube, the end of the forming tube fits with the first third template, the second folded edge on the first second template is fixed with the third folded edge on the first third template by bolts, and fix the first third template to the base; vertically place the second second template on the outside of the third side surface of the steel cage, and insert the second second template into the second positioning hole at the other end of the forming tube. The second positioning column on the template is inserted into the second positioning hole at the other end of the forming tube, the end of the forming tube is fitted with the second second template, the second folded edge of the second second template is fixed to the third folded edge of the first third template by bolts, and the second second template is fixed to the base; the second third template is vertically placed on the outside of the fourth side of the steel cage, the second positioning column on the second third template is inserted into the second positioning hole at the other end of the forming tube, the end of the forming tube is fitted with the second third template, the second folded edge on the second second template is fixed to the third folded edge on the second third template by bolts, the third folded edge of the second third template is fixed to the second folded edge of the first second template by bolts, and the second third template is fixed to the base;

[0015] S4, the screw passes through the through holes on the first connecting plate and the second connecting plate to fix the first template to the second template and the third template respectively;

[0016] S5. Pour concrete into the mold to obtain a prefabricated water culvert.

[0017] The advantages and positive effects of the prefabricated water box culvert preparation mold and preparation method described in the present invention are:

[0018] 1. The outer mold is provided with a first fixing structure for fixing the forming cylinder, and the first fixing structure is used to fix one end of the forming cylinder. The inner mold is provided with a second fixing structure for fixing the forming cylinder, and the second fixing structure is used to fix the other end of the forming cylinder. The forming cylinder is fixed between the inner mold and the outer mold by the first fixing structure and the second fixing structure, thereby improving the stability of the forming cylinder during the box culvert forming process, improving the accuracy of the opening forming on the box culvert, improving the uniformity of the opening, avoiding stress concentration caused by uneven openings, and being conducive to improving the durability of the box culvert.

[0019] 2. The first template is provided with a first folded edge, and the adjacent first templates are connected by the first folded edge, which is convenient for the assembly and disassembly of the outer mold. The second template is provided with a second folded edge, and the third template is provided with a third folded edge. The adjacent second templates and third templates are connected by the second folded edge and the third folded edge, which is convenient for the assembly and disassembly of the inner mold.

[0020] 3. The top of the inner mold and the outer mold are locked between the first mold, the second mold and the third mold by screws and nuts, which improves the overall stability of the mold, reduces the displacement of the inner mold and the outer mold during the box culvert forming process, and is beneficial to improve the stability of the forming cylinder and the forming accuracy of the opening.

[0021] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0023] Figure 2 It is a schematic diagram of a top view of the structure of an embodiment of the present invention;

[0024] Figure 3 For attachment Figure 2 Middle A: Enlarged view;

[0025] Figure 4 is a schematic diagram of a cross-sectional structure of an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the forming cylinder installation structure according to an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the inner mold and outer mold connection structure of an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of a first template structure according to an embodiment of the present invention;

[0029] Figure 8 is a schematic diagram of a second template structure according to an embodiment of the present invention;

[0030] Fig. 9 This is a schematic diagram of a third template structure according to an embodiment of the present invention;

[0031] Fig.10 This is a schematic diagram of the cross-sectional structure of the prefabricated water box culvert.

[0032] Reference numerals

[0033] 1. Base; 2. Outer mold; 21. First mold plate; 22. First folding edge; 23. First connecting plate; 24. First positioning column; 3. Inner mold; 31. Second mold plate; 32. Third mold plate; 33. Forming section; 34. Second folding edge; 35. Third folding edge; 36. Second connecting plate; 37. Second positioning column; 4. Screw; 5. Forming cylinder. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0035] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0036] Example

[0037] like Figure 1-Figure 6As shown. A prefabricated water box culvert preparation mold includes an inner mold 3 and an outer mold 2, the outer mold 2 is sleeved on the outside of the inner mold 3, and the inner mold 3 and the outer mold 2 are both rectangular structures. The outer mold 2 and the inner mold 3 are both fixedly set on the base 1, and the fixing method can be selected to be fixed by bolts, which is convenient for the disassembly of the outer mold 2, the inner mold 3 and the base 1. A pre-bundled steel cage is arranged between the outer mold 2 and the inner mold 3 to strengthen the box culvert. A plurality of forming tubes 5 for forming openings are arranged between the outer mold 2 and the inner mold 3. The shape of the forming tube 5 is set as required, and can be cylindrical or cubic. A placement position for the forming tube 5 is reserved in the steel cage, which is convenient for placing the forming tube 5 in the steel cage.

[0038] The outer mold 2 is provided with a first fixing structure for fixing the forming tube 5, and the first fixing structure is used to fix one end of the forming tube 5. The inner mold 3 is provided with a second fixing structure for fixing the forming tube 5, and the second fixing structure is used to fix the other end of the forming tube 5. The forming tube 5 is fixed between the inner mold 3 and the outer mold 2 by the first fixing structure and the second fixing structure, thereby improving the stability of the forming tube 5 during the box culvert forming process, improving the accuracy of the opening forming on the box culvert, improving the uniformity of the opening, avoiding stress concentration caused by uneven openings, and being conducive to improving the durability of the box culvert.

[0039] like Figure 7 As shown. The outer mold 2 includes a rectangular first template 21, and one end of the first template 21 is provided with a first folded edge 22 folded outward. A plurality of first connection holes are evenly arranged on the first folded edge 22, and the other end of the first template 21 is provided with second connection holes corresponding to the first connection holes. The first folded edge 22 is attached to the adjacent first templates 21, and the adjacent first templates 21 are fixedly connected by the first connection hole, the second connection hole and the bolt. The adjacent first templates 21 are connected by the first folded edge 22, which facilitates the assembly and disassembly of the outer mold 2.

[0040] The first fixing structure includes a first positioning column 24 fixedly arranged on the first template 21, and the first positioning column 24 is arranged one-to-one with the forming tube 5. A through hole is provided on the first template 21 for the first positioning column 24 to pass through. The first positioning column 24 is a T-shaped structure, and the large end of the first positioning column 24 is fixed to the first template 21 by welding. The first positioning column 24 maintains a horizontal state. A first positioning hole adapted to the first positioning column 24 is provided at one end of the forming tube 5. The size of the first positioning hole is slightly larger than the first positioning column 24, so that the first positioning column 24 can be just inserted into the first positioning hole, and the end of the forming tube 5 close to the first template 21 is positioned by the first positioning hole and the first positioning column 24.

[0041] like Figure 8 , Fig. 9As shown. The inner mold 3 includes a rectangular second template 31 and a third template 32, and the second template 31 and the third template 32 are spaced apart. Both ends of the second template 31 are provided with arc-shaped forming sections 33, and the forming sections 33 are used to form the transition arc surface of the inner surface of the box culvert. The forming section 33 is provided with a second folded edge 34 folded inwardly, and a plurality of third connecting holes are evenly arranged on the second folded edge 34. Both ends of the third template 32 are provided with a third folded edge 35 bent outwardly, and the third folded edge 35 is provided with a fourth connecting hole corresponding to the third connecting hole one by one. The second folded edge 34 is fitted with the third folded edge 35, and the adjacent second templates 31 and the third templates 32 are fixedly connected by the third connecting hole, the fourth connecting hole and the bolt. The adjacent second templates 31 and the third templates 32 are connected by the second folded edge 34 and the third folded edge 35, which is convenient for the assembly and disassembly of the inner mold 3.

[0042] The second fixing structure includes a second positioning column 37 fixedly arranged on the second template 31 and the third template 32. The second positioning column 37 is arranged in a one-to-one correspondence with the forming tube 5. The second template 31 and the third template 32 are both provided with a through hole for the second positioning column 37 to pass through. The second positioning column 37 is a T-shaped structure, and the large end of the second positioning column 37 is fixed to the second template 31 or the third template 32 by welding. The second positioning column 37 maintains a horizontal state. The other end of the forming tube 5 is provided with a second positioning hole adapted to the second positioning column 37. The size of the second positioning hole is slightly larger than the second positioning column 37, so that the second positioning column 37 is just inserted into the second positioning hole, and the second positioning hole and the second positioning column 37 are used to position the end of the forming tube 5 close to the second template 31 and the third template 32. Both ends of the forming tube 5 are fixed, which improves the stability of the forming tube 5 and is conducive to improving the forming accuracy of the opening on the box culvert.

[0043] The inner mold 3 and the outer mold 2 are connected by a connecting structure. The connecting structure includes a plurality of first connecting plates 23 fixedly arranged at the top of the first mold plate 21, and a plurality of second connecting plates 36 are arranged at the top of the second mold plate 31 and the third mold plate 32, and the first connecting plates 23 correspond to the second connecting plates 36 one by one. The first connecting plates 23 and the second connecting plates 36 are both provided with through holes for the screw rod 4 to pass through, and the first connecting plates 23 and the second connecting plates 36 are locked and connected by the screw rod 4 and the nut. The inner mold 3 and the top of the outer mold 2 are locked by the screw rod 4 and the nut, which improves the overall stability of the mold, reduces the displacement of the inner mold 3 and the outer mold 2 during the box culvert forming process, and is conducive to improving the stability of the forming tube 5 and improving the forming accuracy of the opening.

[0044] The base 1 is provided with diagonal support rods for supporting the outer mold 2. The diagonal support rods adopt the existing structure and are used to improve the stability of the entire mold.

[0045] The method for preparing a prefabricated water box culvert comprises the following steps:

[0046] S1. Place the tied steel cage on the base 1, place the first first template 21 vertically on the outside of the first side of the steel cage, and make the first positioning column 24 on the first first template 21 correspond to the placement position of the forming tube 5 reserved on the first side of the steel cage one by one; place the second first template 21 vertically on the outside of the second side of the steel cage, make the first positioning column 24 on the second first template 21 correspond to the placement position of the forming tube 5 reserved on the second side of the steel cage one by one, and fix the first folded edge 22 of the second first template 21 to the first first template 21 with bolts; place the third first template 21 vertically on the outside of the third side of the steel cage, and make the first positioning column 24 on the third first template 21 correspond to the placement position of the forming tube 5 reserved on the second side of the steel cage. 24 corresponds to the placement position of the forming tube 5 reserved on the third side of the steel cage, and the first folded edge 22 of the third first template 21 is fixedly connected to the second first template 21 by bolts; the fourth first template 21 is vertically placed on the outside of the fourth side of the steel cage, and the first positioning column 24 on the fourth first template 21 corresponds to the placement position of the forming tube 5 reserved on the fourth side of the steel cage, and the first folded edge 22 of the fourth first template 21 is fixedly connected to the third first template 21 by bolts; the first folded edge 22 of the first first template 21 is fixedly connected to the fourth first template 21 by bolts; the distance between the first template 21 and the steel cage is adjusted, and the first template 21 is fixed to the base 1. The outer mold 2 is supported by diagonal braces.

[0047] S2. Place the forming tubes 5 one by one in the reserved positions of the steel cage, insert the first positioning column 24 into the first positioning hole at one end of the forming tube 5, and fit the end of the forming tube 5 with the first template 21.

[0048] S3, vertically place the first second template 31 on the outside of the first side of the steel cage, insert the second positioning column 37 on the first second template 31 into the second positioning hole at the other end of the forming tube 5, the end of the forming tube 5 fits with the first second template 31, and fix the first second template 31 to the base 1; vertically place the first third template 32 on the outside of the second side of the steel cage, insert the second positioning column 37 on the first third template 32 into the second positioning hole at the other end of the forming tube 5, the end of the forming tube 5 fits with the first third template 32, the second folded edge 34 on the first second template 31 and the third folded edge 35 on the first third template 32 are fixed by bolts, and the first third template 32 is fixed to the base 1; vertically place the second second template 31 on the outside of the third side of the steel cage, insert the second positioning column 37 on the second third template 31 into the second positioning hole at the other end of the forming tube 5, the end of the forming tube 5 fits with the first third template 32, The second positioning column 37 is inserted into the second positioning hole at the other end of the forming tube 5, the end of the forming tube 5 is fitted with the second second template 31, the second folded edge 34 of the second second template 31 is fixed to the third folded edge 35 of the first third template 32 by bolts, and the second second template 31 is fixed to the base 1; the second third template 32 is vertically placed on the outer side of the fourth side of the steel cage, and the second positioning column 37 on the second third template 32 is inserted into the second positioning hole at the other end of the forming tube 5, the end of the forming tube 5 is fitted with the second third template 32, the second folded edge 34 on the second second template 31 is fixed to the third folded edge 35 on the second third template 32 by bolts, the third folded edge 35 of the second third template 32 is fixed to the second folded edge 34 of the first second template 31 by bolts, and the second third template 32 is fixed to the base 1.

[0049] S4, the screw rod 4 passes through the through holes on the first connecting plate 23 and the second connecting plate 36 to respectively fix the first template 21 with the second template 31 and the third template 32. The first template 21 can also be fixed to the second template 31 and the third template 32 directly after each second template 31 and the third template 32 are fixed.

[0050] S5. Pour concrete into the mold to obtain a prefabricated water culvert.

[0051] Therefore, the use of the prefabricated water box culvert preparation mold and preparation method described in the present invention can solve the problem that the inner openings of the water box culvert prepared by the existing mold are uneven, resulting in stress concentration and reduced durability.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A mold for preparing a prefabricated water box culvert, characterized in that: It comprises an inner mold and an outer mold, the outer mold is sleeved on the outside of the inner mold, the outer mold and the inner mold are both arranged on a base, a plurality of forming cylinders for forming openings are arranged between the outer mold and the inner mold, a first fixing structure for fixing the forming cylinder is arranged on the outer mold, a second fixing structure for fixing the forming cylinder is arranged on the inner mold, and the inner mold and the outer mold are connected by a connecting structure; The first fixing structure includes a first positioning column fixedly arranged on the outer mold, the first positioning column and the molding tube are arranged one by one, one end of the first positioning column is inserted into the molding tube, and the first positioning column positions the end of the molding tube close to the outer mold; The second fixing structure includes a second positioning column fixedly arranged on the inner mold, the second positioning column and the forming tube are arranged one-to-one, one end of the second positioning column is inserted into the forming tube, and the second positioning column positions the end of the forming tube close to the inner mold; The inner mold includes a rectangular second template and a third template. The second template is spaced apart from the third template. Both ends of the second template are provided with arc-shaped forming sections. The forming sections are provided with second folded edges folded inwardly. The second folded edges are evenly provided with a plurality of third connecting holes. Both ends of the third template are provided with third folded edges bent outwardly. The third folded edges are provided with fourth connecting holes corresponding to the third connecting holes one by one. The second template and the third template are fixedly connected by the third connecting holes, the fourth connecting holes and bolts.

2. A prefabricated water box culvert preparation mold according to claim 1, characterized in that: The connection structure includes a plurality of first connection plates arranged at the top end of the outer mold and a plurality of second connection plates arranged at the top end of the inner mold. The first connection plates correspond to the second connection plates one by one. Both the first connection plates and the second connection plates are provided with through holes for screws to pass through. The first connection plates and the second connection plates are locked and connected by screws and nuts.

3. A prefabricated water box culvert preparation mold according to claim 2, characterized in that: The outer mold includes a rectangular first template, one end of the first template is provided with a first folded edge folded outward, a plurality of first connecting holes are evenly arranged on the first folded edge, the other end of the first template is provided with second connecting holes corresponding to the first connecting holes one by one, and adjacent first templates are fixedly connected by the first connecting holes, the second connecting holes and bolts.

4. A prefabricated water box culvert preparation mold according to claim 3, characterized in that: The base is provided with an oblique support rod for supporting the outer mold.

5. A method for preparing a prefabricated water box culvert based on a prefabricated water box culvert preparation mold according to claim 4, characterized in that: The following steps are involved: S1. Place the tied steel cage on the base, vertically place the first first template on the outside of the first side of the steel cage, and make the first positioning column on the first first template correspond to the placement position of the forming tube reserved on the first side of the steel cage one by one; vertically place the second first template on the outside of the second side of the steel cage, and make the first positioning column on the second first template correspond to the placement position of the forming tube reserved on the second side of the steel cage one by one, and fix the first folded edge of the second first template to the first first template with bolts; vertically place the third first template on the outside of the third side of the steel cage, and make the first positioning column on the third first template correspond to the placement position of the forming tube reserved on the second side of the steel cage one by one. A positioning column is corresponding to the position of the forming tube reserved on the third side of the steel cage, and the first folded edge of the third first template is fixedly connected to the second first template by bolts; the fourth first template is vertically placed on the outside of the fourth side of the steel cage, the first positioning column on the fourth first template is corresponding to the position of the forming tube reserved on the fourth side of the steel cage, and the first folded edge of the fourth first template is fixedly connected to the third first template by bolts; the first folded edge of the first first template is fixedly connected to the fourth first template by bolts; the distance between the first template and the steel cage is adjusted, and the first template is fixed to the base; S2, placing the forming tubes one by one in the reserved positions of the steel cage, inserting the first positioning column into the first positioning hole at one end of the forming tube, and fitting the end of the forming tube to the first template; S3, vertically placing the first second template outside the first side of the steel cage, inserting the second positioning column on the first second template into the second positioning hole at the other end of the forming tube, fitting the end of the forming tube with the first second template, and fixing the first second template to the base; Place the first third template vertically on the outside of the second side surface of the steel cage, insert the second positioning column on the first third template into the second positioning hole at the other end of the forming tube, the end of the forming tube fits with the first third template, the second folded edge on the first second template and the third folded edge on the first third template are fixed by bolts, and the first third template is fixed to the base; place the second second template vertically on the outside of the third side surface of the steel cage, insert the second positioning column on the second second template into the second positioning hole at the other end of the forming tube, the end of the forming tube fits with the second second template, and the second The second folded edge of the second template is fixed to the third folded edge of the first third template by bolts, and the second second template is fixed to the base; the second third template is vertically placed on the outside of the fourth side of the steel cage, and the second positioning column on the second third template is inserted into the second positioning hole at the other end of the forming tube, and the end of the forming tube is fitted with the second third template, and the second folded edge on the second second template is fixed to the third folded edge on the second third template by bolts, and the third folded edge of the second third template is fixed to the second folded edge of the first second template by bolts, and the second third template is fixed to the base; S4, the screw passes through the through holes on the first connecting plate and the second connecting plate to fix the first template to the second template and the third template respectively; S5. Pour concrete into the mold to obtain a prefabricated water culvert.

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