A pre-reserved hole formwork structure with easy-to-remove formwork and a method of using the same

Abstract

The present invention discloses a pre-reserved hole formwork structure that is easy to dismantle and a method for using the same, comprising a pair of first side formworks arranged side by side and opposite to each other, a second side formwork being arranged side by side and opposite to each other between the first side formworks, a plurality of connecting wood sections being connected between the second side formworks, the first side formworks being connected to the connecting wood sections, a cover plate formwork being installed at the first end of the first side formworks and the second side formworks, a bottom surface formwork being installed at the second end of the first side formworks and the second side formworks, both sides of the first side formworks and the second side formworks being provided with chamfered edges, and a filler being filled in the gap between the chamfered edges of adjacent first side formworks and second side formworks. The present invention can solve the construction technical problems of difficult demolding, easy damage to the structure, easy residue, and low construction efficiency during the construction of deep hole pre-reserved holes.

Description

Technical Field

[0001] The invention relates to the technical field of formwork and scaffolding, and in particular to a pre-reserved hole support formwork structure that is easy to dismantle and a use method thereof. Background Art

[0002] In the civil engineering structures of industrial and civil buildings, a large number of reserved holes are often provided to meet the requirements of steel structure installation, production process, and process equipment installation, such as the reserved holes of various cup-shaped foundations, anchor bolt holes, equipment pier holes, pipeline reserved holes, holes formed by structural height dislocation, etc. These holes have a common feature in form, namely "deep holes" (deep holes and small cross-sectional dimensions). Influenced by factors such as the reinforcement arrangement of the civil engineering structure itself and the maximum adjustment margin of embedded parts, the reserved deep holes are generally designed to be rectangular in cross-section.

[0003] The traditional construction method for reserved deep holes is the "nail box" method, that is, first cut and process the templates for the contact surfaces of the holes and the concrete according to the designed length, width and height of the reserved holes, and then nail the templates of the contact surfaces directly to each other to form a hexahedral hollow wooden box, and fix the wooden box in the reserved position before pouring concrete; finally, after the concrete pouring has finally set and reached the demolding strength, the hollow wooden box is removed from the concrete structure, leaving a gap to form a reserved hole.

[0004] After many engineering practices, the traditional "nail box" method can achieve the purpose of reserving holes, but it also has defects:

[0005] 1. The reserved holes are deep and small in cross-section, and the structure of the wooden box is not reasonable, which makes the demoulding construction difficult and the template for assembling the wooden box is not easy to remove.

[0006] 2. Since the wooden box deck is not easy to remove, the concrete around the hole will often be damaged during the demolding operation or the wooden deck will not be completely removed, which will have an adverse impact on subsequent construction and the quality of the project entity. Summary of the invention

[0007] The present invention provides a pre-reserved hole formwork structure that is easy to remove and a use method thereof, which can solve the construction technical problems of difficult formwork removal, easy damage to the structure, easy residue and low construction efficiency during the construction of deep-hole pre-reserved holes.

[0008] To achieve the above-mentioned purpose, in a first aspect, the present invention provides the following technical solutions: a pre-reserved hole formwork structure that is easy to dismantle, comprising a pair of first side formworks arranged side by side and opposite to each other, second side formworks are arranged side by side and opposite to each other between the first side formworks, a plurality of connecting wood sections are connected between the second side formworks, the first side formworks are connected to the connecting wood sections, a cover plate formwork is installed at the first end of the first side formworks and the second side formworks, a bottom surface formwork is installed at the second end of the first side formworks and the second side formworks, both sides of the first side formworks and the second side formworks are provided with beveled chamfers, and the gap between the beveled chamfers of adjacent first side formworks and the second side formworks is filled with fillers.

[0009] Preferably, the end of the connecting wood segment is connected to the second side formwork via nails, and the side of the connecting wood segment is connected to the first side formwork via nails.

[0010] Preferably, the width of the inner side surface of the first side template is smaller than the width of the outer side surface, and the width of the inner side surface of the second side template is larger than the width of the outer side surface.

[0011] Preferably, binding wires are wound around the outer sides of the first side formwork and the second side formwork.

[0012] Preferably, the filler is a foaming agent or a sponge strip.

[0013] Preferably, a long nail is nailed in the center of the bottom template, and after the long nail passes through the bottom template, the nail tail is closely attached to the template, and the nail head is bent into a barb.

[0014] In a second aspect, a method for using the pre-reserved hole formwork structure for easy disassembly of the formwork according to the first aspect comprises the following steps:

[0015] S1. Assemble the first side formwork and the connecting wood section: Nail the connecting wood section to the inner side of the first side formwork perpendicular to the long side of the side formwork along the length direction of the first side formwork at a spacing of 200mm, so that the distance between the two ends of the connecting wood section and the edge of the formwork is consistent. When nailing, draw a line first, and then nail from the outer side of the first side formwork to the inner side to connect the first side formwork and the connecting wood section.

[0016] S2, cover the side edge of the inner side surface of the first side template on the side edge of the second side template, so that the outer side edge line of the first side template and the outer side surface of the second side template are in the same plane;

[0017] S3, firmly nailing the second side formwork to the connecting wood section nailed to the first side formwork;

[0018] S4. Nail the bottom template to the bottom of the side template in the center position, with the second side template not nailed, with the nail hook facing the inside of the formwork structure, and then nail the cover template;

[0019] S5. Fill the notch of the chamfered surface, the gap of the template, and the convex platform of the bottom template with fillers to close the gaps and convex corners to reduce slurry leakage and ensure the design size of the reserved holes;

[0020] S6. Formwork removal construction: first remove the cover formwork, then remove the connecting wooden section supporting the second side formwork, and then remove the second side formwork. Since the supporting connecting wooden section of the second side formwork has been removed, and it is not connected to the second side formwork and other parts of the first side formwork, and the outer corners are chamfered, there is enough space for prying, so use tools to pry it apart, then remove the first side formwork, and finally remove the bottom formwork, clean the holes, and remove all remaining debris.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] An easily removable and fairly stable connecting wooden section is used as the connecting medium and internal support between the first side formwork and the second side formwork, avoiding direct connection between the first side formwork and the second side formwork. The outer corners of the first side formwork and the second side formwork are chamfered to reduce the contact width between the formworks and between the formworks and the concrete side walls, making it easier for the formworks to rotate in a narrow space and reducing the squeezing effect of the expansion of the wooden formwork on the side walls. A two-to-two opposing formwork design is adopted to make the force more reasonable. Soft filling is used for gaps and vacant parts to ensure both the cross-sectional size and facilitate construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a top view of the structure of the present invention;

[0024] Figure 2 for Figure 1 AA section structure diagram;

[0025] Figure 3 for Figure 1 BB section structure diagram. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0027] like Figure 1-3As shown, in order to solve the construction technical problems of difficult demolding, easy damage to the structure, easy residue and low construction efficiency during the construction of deep hole reserved holes, a pre-demolded reserved hole support structure with easy demolding is provided in this embodiment, including a pair of first side templates 1 arranged side by side and opposite to each other, second side templates 2 are arranged side by side and opposite to each other between the first side templates 1, a plurality of connecting wood sections 3 are connected between the second side templates 2, the first side templates 1 are connected to the connecting wood sections 3, a cover template 6 is installed at the first end of the first side template 1 and the second side template 2, a bottom template 7 is installed at the second end of the first side template 1 and the second side template 2, both sides of the first side template 1 and the second side template 2 are provided with bevel chamfered portions 4, and the gap between the bevel chamfered portions 4 of adjacent first side templates 1 and the second side template 2 is filled with filler 5.

[0028] Specifically, the first side formwork 1 and the second side formwork 2 are opposite to each other and divided into 2 groups. The width of the first side formwork 1 is the corresponding side length of the reserved hole. A 5mm chamfered edge 4 is made on both sides of the width direction of each first side formwork 1, so that the inner side width of the first side formwork 1 is 10mm less than the corresponding hole side length; the width of the second side formwork 2 is the corresponding side length of the reserved hole minus the thickness of 2 supporting plates. A 5mm chamfered edge 4 is made on both sides of the width direction of the second side formwork 2, so that the inner side width of the second side formwork 2 is 10mm less than the outer side width, and the length of the side formwork is the depth of the hole plus 100mm; a connecting wood section 3 is made of 20mm wide supporting plate strips or small wooden squares, and the length is the outer side width of the first side formwork 1 minus the thickness of 2 supporting plates; a bottom formwork 7 is made with a supporting plate according to the size of the hole side length (length, width) minus 10mm; a cover plate formwork 6 is made with a supporting plate according to the size of the hole side length (length, width).

[0029] In this embodiment, if Figure 1-3 As shown, the end of the connecting wood segment 3 is connected to the second side formwork 2 via nails, and the side of the connecting wood segment 3 is connected to the first side formwork 1 via nails.

[0030] In addition, the first side formwork 1 and the second side formwork 2 are not nailed together, and binding wires are wound around the outer sides of the first side formwork 1 and the second side formwork 2 to increase the firmness. The filler 5 is a foaming agent or a sponge strip, which fills the gap and the convex corner to reduce leakage and ensure the design size of the reserved hole.

[0031] At the same time, a long nail is nailed in the center of the bottom template 7. After the long nail passes through the bottom template 7, the nail tail is close to the template and the nail head is bent into a barb.

[0032] In this embodiment, the method for using the technical solution of this embodiment includes the following steps:

[0033] S1. Assembly of the first side formwork 1 and the connecting wooden segments 3: Nail the connecting wooden segments 3 perpendicular to the long side of the side formwork along the length direction of the first side formwork 1 at an interval of 200 mm on the inner side of the first side formwork 1, so that the distances from both ends of the connecting wooden segments 3 to the formwork edge are the same. When nailing, first draw a line, and then drive nails from the outer side to the inner side of the first side formwork 1 to connect the first side formwork 1 and the connecting wooden segments 3.

[0034] S2. Cover the side edge of the inner side of the first side formwork 1 on the side edge of the second side formwork 2, so that the outer side line of the first side formwork 1 and the outer side surface of the second side formwork 2 are in the same plane.

[0035] S3. Nail and firmly connect the second side formwork 2 and the connecting wooden segments 3 nailed on the first side formwork 1 with nails.

[0036] S4. Nail the bottom formwork 7 at the center position to the bottom of the side formwork, without nailing at the position of the second side formwork 2, with the nail hooks facing the inside of the formwork support structure, and then nail the cover formwork 6.

[0037] S5. Fill the notch part of the inclined chamfer 4, the formwork gap part, and the convex platform part of the bottom formwork 7 with the filler 5 to close the gaps and convex corners to reduce mortar leakage and ensure the designed dimensions of the reserved holes.

[0038] S6. Formwork removal construction: First remove the cover formwork 6, then remove the connecting wooden segments 3 supporting the second side formwork 2, then remove the second side formwork 2. Since the supporting connecting wooden segments 3 of the second side formwork 2 have been removed, and there is no connection between the second side formwork 2 and other parts of the first side formwork 1, and there are chamfers at the outer corners, there is enough space for prying and removing. So use tools to pry and remove, then remove the first side formwork 1, and finally remove the bottom formwork 7, clean the holes, and remove all the remaining sundries.

[0039] The technical solution of this embodiment overcomes the defects that it is difficult to remove the formwork during the construction of deep-hole type reserved holes with deep reserved holes and small cross-sections, and it is not easy to take out the wooden box bearing plate; it overcomes the defects that the wooden box bearing plate often damages the concrete around the hole or causes incomplete removal of the wooden bearing plate during formwork removal operation, which has an adverse impact on the subsequent construction and the quality of the engineering entity, and improves the construction efficiency.

[0040] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a certain specific posture (as shown in the drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0041] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A method for using a pre-reserved hole formwork structure that is easy to remove. It is characterized in that The invention comprises a pair of first side templates (1) arranged side by side and opposite to each other, second side templates (2) are arranged side by side and opposite to each other between the first side templates (1), a plurality of connecting wood sections (3) are connected between the second side templates (2), the first side template (1) is connected to the connecting wood sections (3), a cover template (6) is installed at the first end of the first side template (1) and the second side template (2), a bottom template (7) is installed at the second end of the first side template (1) and the second side template (2), both sides of the first side template (1) and the second side template (2) are provided with chamfered edges (4), and a filler (5) is filled in the gap between the chamfered edges (4) of the adjacent first side templates (1) and the second side templates (2), and the invention comprises the following steps: S1, assembling the first side formwork (1) and the connecting wood section (3): nailing the connecting wood section (3) to the inner side surface of the first side formwork (1) perpendicular to the long side of the side formwork along the length direction of the first side formwork (1) at a spacing of 200 mm, so that the distance between the two ends of the connecting wood section (3) and the edge of the formwork is consistent. When nailing, first mark the line, and then nail from the outer side of the first side formwork (1) to the inner side, so as to connect the first side formwork (1) and the connecting wood section (3); S2, covering the side edge of the inner surface of the first side template (1) on the side edge of the second side template (2), so that the outer side edge line of the first side template (1) and the outer side surface of the second side template (2) are in the same plane; S3, firmly nailing the second side formwork (2) to the connecting wood section (3) nailed to the first side formwork (1); S4, nail the bottom template (7) to the bottom of the side template in the center position, wherein the second side template (2) is not nailed, and the nail hook faces the inside of the formwork structure, and then nail the cover template (6); S5, filling the notch of the chamfered edge (4), the gap of the template, and the convex part of the bottom template (7) with fillers (5), bridging the gaps and convex corners to reduce slurry leakage and ensure the design size of the reserved holes; S6, demoulding construction: first remove the cover template (6), then remove the connecting wood section (3) supporting the second side template (2), and then remove the second side template (2). Since the supporting connecting wood section (3) of the second side template (2) has been removed and is not connected to the second side template (2) and other parts of the first side template (1), and the outer corners are chamfered, there is enough space for prying, so use tools to pry and then remove the first side template (1), and finally remove the bottom template (7), clean the holes, and remove the remaining debris.

2. A method for using the pre-reserved hole formwork structure for easy disassembly according to claim 1, Features: The end of the connecting wood section (3) is connected to the second side formwork (2) via nails, and the side of the connecting wood section (3) is connected to the first side formwork (1) via nails.

3. A method for using the pre-reserved hole formwork structure for easy disassembly according to claim 1, Features: The width of the inner side surface of the first side template (1) is smaller than the width of the outer side surface, and the width of the inner side surface of the second side template (2) is larger than the width of the outer side surface.

4. A method for using the pre-reserved hole formwork structure for easy disassembly according to claim 1, Features: Iron wires are wrapped and bound around the outer sides of the first side formwork (1) and the second side formwork (2).

5. A method for using the pre-reserved hole formwork structure for easy disassembly of the formwork according to claim 1, Features: The filler (5) is a foaming agent or a sponge strip.

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