Construction method of special-shaped concrete top for greenhouse

Abstract

The invention discloses a construction method for special-shaped concrete top pressing of a greenhouse. The method comprises the following steps: S1, making a steel formwork frame; S2, making a steel formwork template; S3, fixing the left frame and the left formwork template to form a left integral steel formwork; S4, laying out key control points; S5, steel bar binding acceptance; S6, erecting the first left integral steel formwork and the first right integral steel formwork; S7, erecting the second left integral steel formwork and the second right integral steel formwork; S8, erecting the nth left integral steel formwork in sequence; S9, installing the first upper sealing template and pouring concrete; S10, repeating step S9 to sequentially install the upper sealing templates of each frame; S11, maintenance and removal. The steel formwork system of the present invention is designed with multiple frame structures that match the special-shaped curved wall, which is easy to install and disassemble; the upper sealing steel template is designed to be a detachable structure, which is flexible to install and easy to vibrate, and quality defects such as honeycomb and pockmarks are eliminated.

Description

Technical Field

[0001] The invention relates to greenhouse construction, in particular to a construction method for a greenhouse special-shaped concrete top. Background Art

[0002] Greenhouses are facilities used to grow plants. They can provide a greenhouse growth period and increase production in seasons that are not suitable for plant growth. The greenhouse's unique north-south gable curved surface structure is required to match the local solar altitude angle on the winter solstice in order to achieve maximum heat absorption and heat storage capacity.

[0003] In order to improve thermal insulation and sealing, capping concrete is poured on the side walls of the greenhouse. After demoulding, the capping concrete must be consistent with the curvature of the main keel of the greenhouse, so that the greenhouse PO film can fit closely with the capping beam. The ordinary capping concrete construction method uses wooden formwork for multiple cutting. The wooden formwork is prone to warping and deformation, with low turnover, long construction period and low efficiency. The special-shaped curved surface structure of the greenhouse poses many challenges to the rapid and standardized construction of concrete formwork. Summary of the invention

[0004] The present invention aims to solve the above technical problems, thereby providing a construction method for greenhouse special-shaped concrete top pressing with high construction efficiency and short construction period.

[0005] The present invention solves the technical problem and adopts the following technical solution:

[0006] A construction method for greenhouse special-shaped concrete top pressure, comprising the following steps:

[0007] S1. Make steel formwork frame

[0008] The steel formwork frame is consistent with the wall curve of the greenhouse, including a left frame and a right frame. The cross section of the right frame is U-shaped. The height of the outer vertical part of the right frame is greater than the height of the inner vertical part. The left frame is a single-layer structure. Both the left frame and the right frame are multi-frame.

[0009] S2. Make steel formwork template

[0010] The steel formwork template matches the wall curve of the greenhouse, including the left formwork template, the right formwork template and the upper sealing template. The left formwork template is a single-layer structure, the cross-section of the right formwork template is "ㄣ" shaped, and the cross-section of the upper sealing template is an inverted U shape. The left formwork template, the right formwork template and the upper sealing template are all multi-frame;

[0011] S3, the left frame and the left formwork template are fixed to form a left integral steel formwork, and the right frame and the right formwork template are fixed to form a right integral steel formwork, and the left frames or right frames between adjacent frames are connected by a butt fastener assembly;

[0012] S4, stakeout of key control points;

[0013] S5. Acceptance of steel bar binding

[0014] After the binding of the main reinforcement and stirrups of the capping concrete is completed, inspection and acceptance shall be carried out;

[0015] S6. Erect the first left integral steel formwork and the first right integral steel formwork

[0016] The wall is opened, and the first left integral steel formwork frame and the first right integral steel formwork frame are respectively placed on the upper part of both sides of the wall and fixed;

[0017] S7. Erection of the second left integral steel formwork and the second right integral steel formwork

[0018] The frame of the second left integral steel formwork and the frame of the second right integral steel formwork are respectively connected to the frame of the first left integral steel formwork and the frame of the first right integral steel formwork through a butt fastener assembly;

[0019] S8, sequentially erecting the nth left integral steel formwork and the nth right integral steel formwork;

[0020] S9. Install the first upper sealing formwork and pour concrete

[0021] The first upper sealing template is inverted on the first left formwork template and the first right formwork template and connected through the sealing fastener assembly, and concrete is poured and vibrated from the openings of the first right integral steel formwork and the second right integral steel formwork;

[0022] S10, repeat step S9 to sequentially install the upper sealing formwork of each frame, and sequentially pour and vibrate the concrete of each frame;

[0023] S11. Maintenance and removal.

[0024] Compared with the prior art, the present invention using the above technical solution has the following beneficial effects:

[0025] 1) The steel formwork system is designed with multiple sub-structures that match the special-shaped curved walls, which is simple to obtain materials and easy to install and disassemble; the upper sealing steel formwork is designed to be a detachable structure, which can be flexibly installed with the pouring of concrete and is easy to vibrate, eliminating quality defects such as honeycomb surface.

[0026] 2) The steel formwork system is a standardized steel formwork system, which avoids the time-consuming and labor-intensive drawbacks of using wooden formwork to cut irregular curved surfaces multiple times, increases the turnover rate, and is easy to install and disassemble. The construction speed is fast and the molding quality is good, which shortens the construction period and saves costs. The formwork shape is designed in a forward manner first, and then manufactured and installed, which deeply integrates BIM technology with the construction site.

[0027] Further, the optimization scheme of the present invention is:

[0028] The docking fastener assembly includes a first connecting plate, a second connecting plate and a docking bolt. The first connecting plate and the second connecting plate both have connecting holes. The docking bolt includes a U-shaped portion and an inverted L-shaped portion. One side of the U-shaped portion is fixedly connected to the vertical section of the inverted L-shaped portion. The first connecting plate and the second connecting plate are tightly attached and one side is placed in the U-shaped portion. The horizontal portion of the inverted L-shaped portion is inserted in the connecting hole.

[0029] The sealing fastener assembly comprises an L-shaped connecting plate and butt bolts, and the connecting plate is fixedly connected to both sides of the top surface of the upper sealing template. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 An exploded view of a steel formwork system according to an embodiment of the present invention;

[0031] Figure 2 Schematic diagram of a left skeleton and a right skeleton of an embodiment of the present invention;

[0032] Figure 3 A schematic diagram of key control point layout according to an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the installation of the first left integral steel formwork and the first right integral steel formwork;

[0034] Figure 5 This is a schematic diagram of the installation of the second left integral steel formwork and the second right integral steel formwork;

[0035] Figure 6 It is a schematic diagram of the installation of the upper sealing template, the first left integral steel formwork and the second left integral steel formwork;

[0036] Figure 7 It is a schematic diagram of fixing the upper sealing template, the first left integral steel formwork and the second left integral steel formwork;

[0037] Figure 8 A schematic diagram of a butt fastener assembly according to an embodiment of the present invention;

[0038] Fig. 9 A schematic diagram of a butt-jointed bolt according to an embodiment of the present invention;

[0039] Fig.10 Schematic diagram of pouring concrete;

[0040] Fig.11 This is the curved concrete capping forming diagram.

[0041] In the figure: steel formwork skeleton 1; left skeleton 1-1; right skeleton 1-2; steel formwork template 2; left formwork template 2-1; right formwork template 2-2; upper sealing template 2-3; docking fastener assembly 3; first connecting plate 3-1; second connecting plate 3-2; docking bolt 3-3; sealing fastener assembly 4; connecting plate 4-1; wall 5; capping 5-1; scaffolding 6; first right integral steel formwork 7; first left integral steel formwork 7-1; second right integral steel formwork 8; second left integral steel formwork 8-1; pump truck 9; concrete tank truck 10. DETAILED DESCRIPTION

[0042] The present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0043] This embodiment is a construction method for greenhouse special-shaped concrete top, which is carried out in the following steps:

[0044] S1. Make steel formwork frame

[0045] The steel formwork frame 1 is consistent with the wall curve of the greenhouse, and the curvature is consistent with the curvature of the greenhouse surface. The steel formwork frame 1 is mainly composed of a left frame 1-1 and a right frame 1-2 ( Figure 1 , Figure 2 As shown in the figure, the left frame 1-1 and the right frame 1-2 are both steel bar welded components, the steel bar diameter is 10 mm, the cross section of the right frame 1-2 is U-shaped, the height of the outer vertical part of the right frame 1-2 is greater than the height of the inner vertical part, the left frame 1-2 is a single-layer structure, and the left frame 1-1 and the right frame 1-2 are both set to 6 from bottom to top;

[0046] S2. Make steel formwork template

[0047] The steel formwork template 2 is consistent with the curve of the wall 5 of the greenhouse, and the curvature is consistent with the curvature of the greenhouse curved surface. The steel formwork template 2 is cut and welded with a 2mm thick steel plate. It is mainly composed of a left formwork template 2-1, a right formwork template 2-2 and an upper sealing template 2-3. The left formwork template 2-1 is a single-layer structure, and the cross-section of the right formwork template 2-2 is in the shape of a "ㄣ", which is composed of an inner vertical plate, a flat plate and an outer vertical plate. The cross-section of the upper sealing template 2-3 is an inverted U shape. The left formwork template 2-1, the right formwork template 2-2 and the upper sealing template 2-3 are all set to 6 from bottom to top;

[0048] S3. The left formwork template 2-1 of each frame is placed on the upper part of the inner side of the left frame 1-1 of the frame. The left formwork template 2-1 and the left frame 1-1 are in a planar shape. The left formwork template 2-1 and the left frame 1-1 are fixedly welded to form the left integral steel formwork. The right formwork template 2-2 of each frame is placed on the right frame 1-2. The inner vertical plate of the right formwork template 2-2 is placed on the outer side of the inner vertical part of the right frame 1-2 and is tightly attached. The outer vertical plate of the right formwork template 2-2 is placed on the inner side of the outer vertical part of the right frame 1-2 and is tightly attached, forming a step shape. The right formwork template 2-2 and the right frame 1-2 are welded to form the right integral steel formwork;

[0049] The frames between adjacent frames are connected by butt fastener components 3 ( Figure 8 , Fig. 9 As shown), the docking fastener assembly 3 is mainly composed of a first connecting piece 3-1, a second connecting piece 3-2 and a docking bolt 3-3. The first connecting piece 3-1 and the second connecting piece 3-2 are both rectangular and have circular connecting holes. The docking bolt 3-3 is mainly composed of a U-shaped portion and an inverted L-shaped portion, and one side of the U-shaped portion is fixedly connected to the vertical section of the inverted L-shaped portion. The left skeletons 1-1 of adjacent frames are connected by two groups of docking fastener assemblies 3, and the right skeletons 1-2 of adjacent frames are connected by three groups of docking fastener assemblies 3. The first connecting piece 3-1 and the second connecting piece 3-2 are welded to the two adjacent skeletons respectively. When connected, the first connecting piece 3-1 and the second connecting piece 3-2 are tightly attached, and one side of the two connecting pieces is placed in the U-shaped portion of the docking bolt 3-3, and the horizontal part of the inverted L-shaped portion is inserted into the connecting hole of the first connecting piece 3-1 and the second connecting piece 3-2;

[0050] S4. Stakeout of key control points

[0051] On the completed wall 5, use red paint to mark the starting and ending positions of each integral steel formwork frame in sequence ( Figure 3 As shown in the figure, the control points are a, b, c, d, e, f and g from bottom to top, and the laying-out error is controlled within ±2mm;

[0052] S5. Acceptance of steel bar binding

[0053] The detachable mobile scaffolding 6 is brought into the site, and the wall 5 is fixed with rivets around the scaffolding 6. After the binding of the main reinforcement and stirrups of the top concrete is completed, the supervision unit is requested to inspect the type, quantity, installation position, spacing and pads of the steel bars after passing the special inspection. Only after the acceptance is qualified can the next process be entered;

[0054] S6. Erect the first left integral steel formwork and the first right integral steel formwork ( Figure 4 (shown)

[0055] The wall 5 is opened, the first left integral steel formwork 7-1 and the first right integral steel formwork 7 are respectively placed on the upper part of both sides of the wall 5, the inner vertical plates of the left formwork template 2-1 and the right formwork template 2-2 are close to the upper edge of the wall surface on both sides of the wall 5, and the first left frame 1-1 and the first right frame 1-2 are fixed by through-wall fastening bolts and wooden formwork;

[0056] S7, erect the second left integral steel formwork and the second right integral steel formwork ( Figure 5 (shown)

[0057] The second left integral steel formwork 8-1 and the second right integral steel formwork 8 are respectively connected to the first left integral steel formwork 7-1 and the first right integral steel formwork 7 through the butt fastener assembly 3;

[0058] S8, sequentially erecting the sixth left integral steel formwork frame and the sixth right integral steel formwork frame;

[0059] S9, install the first upper sealing formwork and pour concrete ( Figure 6 , Figure 7 shown)

[0060] The first upper sealing template 2-3 is inverted on the first left formwork template 2-1 and the first right formwork template 2-2 and aligned. The side groove plates of the upper sealing template 2-3, the outer vertical plates of the left formwork template 2-1 and the right formwork template 2-2 are provided with corresponding installation holes. The upper sealing template 2-3 is connected to the left formwork template 2-1 and the right formwork template 2-2 through the sealing fastener assembly 4. The sealing fastener assembly 4 is composed of a connecting plate 4-1 and a docking bolt 3-3. The connecting plate 4-1 is L-shaped and welded on both sides of the top surface of the upper sealing template 2-3. The horizontal part of the inverted L-shaped part of the docking bolt 3-3 is inserted into the installation hole, and the U-shaped part is clamped on the vertical part of the connecting plate 4-1. During installation, insert the docking bolt 3-3 and tap it lightly with a hammer to make the docking bolt 3-3 clamp into the connecting plate 4-1. M20-4 small pump truck 7 (arm length 20m) and concrete tank truck 8 ( Fig.10 As shown), pour concrete from the openings of the first right integral steel formwork 7 and the second right integral steel formwork 8, and vibrate lightly with a vibrating rod to vibrate out the bubbles;

[0061] S10, repeat step S9 to sequentially install the upper sealing formwork 2-3 of each frame, and sequentially pour concrete and vibrate;

[0062] S11. Maintenance and removal

[0063] After 1-2 days of curing, when the cantilevered section outside the top beam 5-1 is removed without causing concrete deflection, the steel formwork of each frame of the top beam concrete can be removed ( Fig.11 as shown).

[0064] The steel formwork of the present invention is a standardized design, which eliminates the detailed layout work of measuring and setting out, and only requires simple measurement and placement of key control points. The steel formwork is designed and manufactured in multiple frames, and each frame is connected by a docking fastener assembly. The docking fasteners are provided with detachable pins, which are installed and tightened, and are easy to disassemble. The upper sealing template is connected to the left formwork template and the right formwork template respectively by the sealing fastener assembly. Before pouring the current frame of concrete, the upper sealing template of this frame is installed quickly and efficiently, and the sealing fastener assembly is fixedly connected. The vibrating rod is inserted and fully vibrated, which can fully guarantee the molding quality of the concrete.

[0065] The steel formwork system and construction method of the present invention optimize the traditional wooden formwork assembly template scheme, solve the shortcomings of the wooden formwork that is time-consuming and labor-intensive to cut multiple times, easy to warp and deform, and has a low turnover rate, and fundamentally avoids the quality defects such as honeycomb, pockmarks, and dog holes caused by the inability to vibrate the concrete poured on a large-angle slope. The concrete is cast in a large-scale manner using a standardized steel formwork. For the first time, the construction process of pouring concrete while installing the upper sealing mold is used. The upper sealing template is connected to the left and right formwork template systems using docking fasteners, which is easy to install and disassemble, greatly shortening the construction period, saving costs, and has a very high value for promotion and application.

[0066] The above description is only a preferred feasible embodiment of the present invention, and does not limit the scope of rights of the present invention. All equivalent structural changes made using the contents of the present invention description and drawings are included in the scope of rights of the present invention.

Claims

1. A construction method for greenhouse special-shaped concrete top, comprising the following steps: S1. Make steel formwork frame The steel formwork frame is consistent with the wall curve of the greenhouse, including a left frame and a right frame. The cross section of the right frame is U-shaped. The height of the outer vertical part of the right frame is greater than the height of the inner vertical part. The left frame is a single-layer structure. Both the left frame and the right frame are multi-frame. S2. Make steel formwork template The steel formwork template matches the wall curve of the greenhouse, including the left formwork template, the right formwork template and the upper sealing template. The left formwork template is a single-layer structure, the cross-section of the right formwork template is "ㄣ" shaped, and the cross-section of the upper sealing template is an inverted U shape. The left formwork template, the right formwork template and the upper sealing template are all multi-frame; S3, the left frame and the left formwork template are fixed to form a left integral steel formwork, and the right frame and the right formwork template are fixed to form a right integral steel formwork, and the left frames or right frames between adjacent frames are connected by a butt fastener assembly; S4, stakeout of key control points; S5. Acceptance of steel bar binding After the binding of the main reinforcement and stirrups of the capping concrete is completed, inspection and acceptance shall be carried out; S6. Erect the first left integral steel formwork and the first right integral steel formwork The wall is opened, and the first left integral steel formwork frame and the first right integral steel formwork frame are respectively placed on the upper part of both sides of the wall and fixed; S7. Erection of the second left integral steel formwork and the second right integral steel formwork The frame of the second left integral steel formwork and the frame of the second right integral steel formwork are respectively connected to the frame of the first left integral steel formwork and the frame of the first right integral steel formwork through a butt fastener assembly; S8, sequentially erecting the nth left integral steel formwork and the nth right integral steel formwork; S9. Install the first upper sealing formwork and pour concrete The first upper sealing template is inverted on the first left formwork template and the first right formwork template and connected through the sealing fastener assembly, and concrete is poured and vibrated from the openings of the first right integral steel formwork and the second right integral steel formwork; S10, repeat step S9 to sequentially install the upper sealing formwork of each frame, and sequentially pour and vibrate the concrete of each frame; S11. Maintenance and removal.

2. The construction method of greenhouse special-shaped concrete top according to claim 1, Features: The docking fastener assembly includes a first connecting plate, a second connecting plate and a docking bolt. The first connecting plate and the second connecting plate both have connecting holes. The docking bolt includes a U-shaped portion and an inverted L-shaped portion. One side of the U-shaped portion is fixedly connected to the vertical section of the inverted L-shaped portion. The first connecting plate and the second connecting plate are tightly attached and one side is placed in the U-shaped portion. The horizontal portion of the inverted L-shaped portion is inserted in the connecting hole.

3. The construction method of greenhouse special-shaped concrete top according to claim 1, Features: The sealing fastener assembly comprises an L-shaped connecting plate and butt bolts, and the connecting plate is fixedly connected to both sides of the top surface of the upper sealing template.

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