JPH0833077B2 - Concrete formwork framework method - Google PatentsConcrete formwork framework method
- Publication number
- JPH0833077B2 JPH0833077B2 JP2285547A JP28554790A JPH0833077B2 JP H0833077 B2 JPH0833077 B2 JP H0833077B2 JP 2285547 A JP2285547 A JP 2285547A JP 28554790 A JP28554790 A JP 28554790A JP H0833077 B2 JPH0833077 B2 JP H0833077B2
- Prior art keywords
- steel pipe
- concrete panel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
- 239000004567 concrete Substances 0.000 title claims description 47
- 238000009415 formwork Methods 0.000 title claims description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 36
- 239000010959 steel Substances 0.000 claims description 36
- 238000003780 insertion Methods 0.000 claims description 14
- 238000010276 construction Methods 0.000 claims description 12
- 239000002184 metals Substances 0.000 claims description 4
- 239000000463 materials Substances 0.000 description 5
- 230000000875 corresponding Effects 0.000 description 3
- 230000003014 reinforcing Effects 0.000 description 3
- 238000004642 transportation engineering Methods 0.000 description 3
- 210000001503 Joints Anatomy 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000007796 conventional methods Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 231100000817 safety factors Toxicity 0.000 description 1
Description: INDUSTRIAL APPLICABILITY The present invention is applicable to concrete houses, condominiums, building construction, and other various civil engineering and construction fields, and is framed in the outer shape of a structure with a thick plywood board called a concrete panel. The present invention relates to a concrete formwork frame construction method used for forming a concrete structure by pouring concrete into the concrete and dismantling it after hardening the concrete.
(B) Prior art In the case of the concrete formwork for walls, as shown in FIG. 9, for example, a pier 11a is attached in the shape of a frame around one side of a concrete panel 1'of 900 mm × 1800 mm, and a reinforcing pier is provided in the central longitudinal direction. Form board 11 for which 11b is struck,
Forming the wall surface of the structure by arranging the piers 11a so that they come to the outer surface, and incorporating the reinforcing bar 3'in the wall surface of the structure.
11 and the separator 4 arranged in an orthogonal position, and the form plate 11
, And the steel pipes 5 ', 5', ... assembled in a lattice pattern on the outer surface of the separator are tightened by the metal fittings 6 ', and the separator 4'protruded from the separator insertion hole formed in the plate member 11 for formwork. And a thick pipe such as a 60 mm or 50 mm square or a 48 mmφ steel pipe 5 '.
The term "separator" used here includes not only a rod-shaped main body having threaded portions at both ends, but also a battledore-shaped joint fitting joined by utilizing the threaded portions.
C. Problems to be solved by the invention 60 mm or 50 used for conventional concrete form forming
Steel pipes of mm square or 48 mmφ are heavy and complicated to handle, so heavy work is required for framework work. Also, when a plate member for a formwork in which a crosspiece is struck on one side of a concrete panel is used, it becomes bulky during storage and transportation, and it takes time and effort to attach it. When concrete is further driven into the formwork, the formwork swells outward due to the concrete pressure, causing a gap between the side edges of the adjacent formwork plate bodies, resulting in a 10th
As shown in the drawing, a step 12 called a misalignment is formed in the portion corresponding to the joint of the panel, and it is necessary to finish the surface depending on the place.
Further, for example, JP-A-55-145276 and JP-A-61-5973.
As described in Japanese Patent No. 5, a frame construction method in which a splint is eliminated has been proposed, but in all cases, the thickness of the steel pipe is the same as that of the above-mentioned conventional example, so it did not lead to improvement of workability.
In particular, by omitting the crosspiece, the holding strength of the concrete panel becomes insufficient and the occurrence rate of the misalignment increases.
D. Means for Solving the Problems The present invention is a concrete formwork framework construction method developed for the purpose of reducing both the labor required for the framework work and the occurrence rate of misalignment. 450 mm width concrete panels with separator insertion holes drilled in desired parts including edges are arranged in series according to the outer shape of the construction,
The separator end is projected from the separator insertion hole to the outside of the panel, and two parallel pieces sandwiching the protruding end of the separator are set on the outer surface of the continuous concrete panel as a set of 25 mmφ. While closely arranging the steel pipes in a grid pattern, the lower end portion of the pipes is supported by a positioning member arranged along the lower end edge of the continuously provided concrete panels, and the steel pipes and separators protruding from the separator insertion holes The purpose is to connect the ends with metal fittings.
The steel pipes can be connected in a straight line by inserting both end portions of a connecting pipe having a collar portion in the middle.
E action By using a narrow panel with a width of 450 mm, which is equivalent to half of the conventional one, and a lightweight steel pipe of 25 mmφ, the burden on the operator is reduced and the panel is used alone, so space for transportation and material storage is secured. Etc.
In addition, two lightweight steel pipes are closely arranged in a grid pattern as a set, and the lower end edge is positioned so that the structure is strong and even, and can withstand concrete pressure sufficiently, and the seams are supported by the steel pipes. There is no difference, and there are almost no differences.
Further, if the connecting rods are connected in a straight line, the frame can be formed without excess or deficiency even if the lengths are not uniform or short.
F. Example A framework method for a concrete formwork according to the present invention will be described with reference to the drawings.
In FIG. 1, reference numeral 1 is a concrete panel having a width of 450 mm, and on both side edges of this concrete panel 1, a half-divided hole 2a for forming a semicircular separator insertion hole (corresponding to half of the circular separator insertion hole) is formed. The separator insertion holes can be formed at the joints by connecting them in the left-right direction.
The half-divided hole 2a is a double-width concrete panel in which a separator insertion hole is previously drilled, and the hole is divided into left and right halves to form a half-divided shape, or a side edge is cut into a half-divided shape. There are various means such as punching a hole in the abutting portion in the state of taking or abutting, and it can be formed not only collectively at the factory but also at the site.
Further, the shape may be a triangle or a quadrangle other than the semicircle, as long as the separator insertion holes are formed when the side edges of the concrete panels are butted against each other.
In the case of forming a concrete formwork, as shown in FIG. 2, first, the reinforcing bar 3 is assembled at a portion corresponding to the inside of the wall, and the concrete panels 1 and 1 are provided along the surface serving as the outer surface of the wall.
・ ・ Separately installed.
Then, the separator 4 is attached in a posture orthogonal to the concrete panel 1 so that the end portion of the separator 4 projects from the separator insertion hole 2 of the concrete panel 1 that is continuously provided.
Next, as shown in FIG. 3, on the outer surface of the concrete panel 1, a set of two 25 mmφ steel pipes 5, 5 ... With the separator 4 sandwiched, along the seam to the panel surface. Placed in close contact with each other, and then the 25mmφ steel pipes 5, 5
・ From above, the same set of 25mmφ steel pipes 5, 5 as above
Is horizontally arranged so as to press the 25 mmφ steel pipes vertically arranged along the joint while sandwiching the separator 4, and each two 25 mmφ steel pipes are arranged in a grid at a pitch of the separator arrangement intervals. .. and the fixing fittings 6, 6 ... Are combined and combined (FIG. 4).
Here, with respect to the concrete panels 1, 1, ..., For example, the lower end of the vertically arranged 25 mmφ steel pipe is locked to the protruding pin of the positioning member 7 horizontally arranged on the base, or as shown in FIG. The lower end of the concrete panel 1 is pressed and fixed together with a 25 mmφ steel pipe by a locking member 8 having an L-shaped cross section, and positioned so that it can sufficiently withstand the concrete pressure poured into the formwork.
If the length of the 25 mmφ steel pipe is insufficient, cut it slightly longer than the separator arrangement interval as shown in Fig. 32.
A mmφ steel pipe is used as a joint material 9 to be fitted on a 25 mmφ steel pipe 5 or 5, or as shown in FIG.
Both ends of a connecting rod (10) having a collar (10a) at the center are inserted and connected.
If the concrete formwork is formed by such a frame construction method, the concrete panel is used alone as the formwork plate body, so it is easy to carry and assemble, and the work is extremely easy because the steel pipe is lightweight. It
Also, the side edges of adjacent panels are the same separator and two pairs of steel pipes 5, 5 ... Connected to the separator.
Since the panels 1 and 1 are supported uniformly from the top to the bottom including the seams as well as the central portion of each panel 1, 1, ..., It is possible to form a highly accurate construction surface with no seam deviation.
The construction method of the present invention can be applied not only to walls but also to pillars and slabs, and as a usage example, the conventional construction method is used at a place near the ground, and the construction method of the present invention is used at a high place. You can also
And in the case of thick walls, there are many concretes poured into the formwork, and if it is judged that the strength is insufficient even if two 25mmφ steel pipes are placed at 45cm intervals, narrow the separator intervals, Like for reinforcement
It is also possible to arrange a 25 mmφ steel pipe 5.
By doing so, the side edges of the adjacent panels are the same separator and the steel pipes 5, 5 joined to the separator.
・ Supported by ・ ・ and evenly supported from the top to the bottom including the seams as well as the center of each panel 1, 1 ・ ・, it is possible to form a construction surface with high accuracy without seam deviation. it can.
Although the present invention uses a concrete panel having a width of 450 mm, the panel width may be a width slightly deviating from the range such as 460 mm, and can be appropriately selected according to the height of the structure. It is also possible to connect them vertically.
Also, the 25 mmφ steel pipe used is not a 25 mmφ in a strict sense, but is an expression as a tentative standard, and it is confirmed that even if it is somewhat thick or thin, it is included in the category of the present invention.
And the height, thickness and material of the panel, the length of the steel pipe,
The distance between the separators and the like may be appropriately changed in consideration of the safety factor within the range where the above-mentioned object of the present invention is achieved, depending on the height and thickness of the structure.
Furthermore, the number and rows of separators are also changed according to the usage.
Effect According to the present invention, the pier is not hammered 450 mm
Since a concrete panel with a width is used as a plate body for formwork, it is easy to carry and assemble, and since a thin steel pipe is used, it is lightweight and easy to work, and a series of formwork from transportation to demolding is formed. It can contribute to the improvement of work efficiency.
Also, two 25mmφ diameter steel pipes are used as a set, and the lower end edge is supported by the positioning member, so the mechanical strength is high, and if the steel pipes are connected together, it will cover the entire area of the formwork. It is possible to create a uniform framework with no excess or deficiency.
In particular, the steel pipes arranged along the seam ensure a large compressive strength at the seam portion and prevent misalignment.
1 to 4 are explanatory views showing the steps of forming a concrete form according to the present invention, FIG. 5 is an explanatory view of positioning of concrete panels, FIGS. 6 and 7 are explanatory views of a joint portion, and FIG. FIG. 9 is an explanatory view showing a modified example in which reinforcing steel pipes are combined, FIG. 9 is an explanatory view of a conventional example, and FIG. 10 is an explanatory view of a step portion formed on the surface of a structure by a conventional method. 1, 1 '... Concrete panel, 2 ... Separator insertion hole, 2a ... Half-divided hole, 3 ... Rebar, 3' ... Rebar material,
4, 4 '... Separator, 5 ... 25mmφ steel pipe, 5' ...
Steel pipe, 6, 6 '... Fixing metal fitting, 7 ... Positioning member, 8
...... Locking member, 9 ...... Joint material, 10 ...... Connecting rod, 10
a …… collar part, 11 …… form plate, 11a …… frame, 12 …… step
Priority Applications (2)
|Application Number||Priority Date||Filing Date||Title|
|Publication Number||Publication Date|
|JPH04174173A JPH04174173A (en)||1992-06-22|
|JPH0833077B2 true JPH0833077B2 (en)||1996-03-29|
Family Applications (1)
|Application Number||Title||Priority Date||Filing Date|
|JP2285547A Expired - Fee Related JPH0833077B2 (en)||1990-04-16||1990-10-23||Concrete formwork framework method|
Country Status (1)
|JP (1)||JPH0833077B2 (en)|
Families Citing this family (1)
|Publication number||Priority date||Publication date||Assignee||Title|
|KR101454276B1 (en) *||2012-01-17||2014-10-23||정문형||method for constructing soil structure|
Family Cites Families (2)
|Publication number||Priority date||Publication date||Assignee||Title|
|JPS55145276A (en) *||1979-05-01||1980-11-12||Shizuhito Ikeda||Method of assembling concrete form|
|JPS6159735U (en) *||1984-09-25||1986-04-22|
- 1990-10-23 JP JP2285547A patent/JPH0833077B2/en not_active Expired - Fee Related
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