JP2743961B2 - Concrete foundation method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for constructing a concrete foundation. Conventional technology and its disadvantages Conventionally, in order to construct a concrete foundation, after leveling the installation position, a stabilizer is cast with concrete,
After curing, assemble a wooden or metal plate formwork, incorporate rebar etc. into the formwork, put concrete in the formwork, form a foundation, remove the formwork after curing and solidification. It was backfilling the stabilizer. As described above, in the conventional method, the number of steps having a high order is large, and the concrete curing period is required twice during the production of the stable plate and the production of the base body, so the construction period becomes extremely long, and at least, It is necessary to go back and forth between the site and the material warehouse etc. in the process from the initial leveling to the installation of the stabilizer, the process from the formwork assembly to the concrete input, and the process of removing and backfilling the formwork. There was a disadvantage that the fare and labor cost were very high. In particular, when constructing the foundation of a building in a location with severe geographical and climatic conditions, such as a mountainous area, construction is required in as short a time as possible, simplifying material transportation, simplifying site work,
Although there is a demand for reduction, these conventional methods cannot meet these demands. In view of the above, several basic construction methods have been proposed to shorten the construction period. One of them is described in JP-A-48-58609. This publication discloses that an L-shaped corner block, a plate-like block for connecting the ends of the corner block, and a hollow prism block are formed in a factory, and formed at the root of the installation site. After doing the splittering or gravel work, assemble the corner block and plate-like block into a shape on top of it, arrange them as necessary, pour ready-mixed concrete into it, Forming, then
Place the prism block on the base part, pour ready-mixed concrete again into the hollow part of the prism block, form the base part by solidification, and at the same time, form an independent foundation integrally with the base part and the base part Is what you do. The other is described in JP-A-61-126222. In this method, concrete is thrown away at the foundation installation position, and the mold plate is separated and erected by the lower support member fixed by the adhesive force at the time of curing or simply placed after curing. After fixing the form plate by the upper support member and forming the form, the anchor bolt is inserted and fixed to the upper support member, and then, the ready-mixed concrete is driven into the inside of the form and cured,
It builds the foundation. The other is disclosed in the microfilm of Japanese Utility Model Application No. 54-83056, in which a discarded concrete is formed, hardened, and then a metal plate is formed on the discarded concrete by welding. A plate (coupling plate) is spaced apart in the direction of extension of the foundation, fixed with screws, etc., and after arranging as necessary, the lower ends of the panel material as a formwork are fitted on both sides of the tie plate. Along with
Attach a separator to the upper end of the panel material and fix the panel material, fill the fresh concrete between the panel materials,
It cures and builds the foundation. In any of the above-mentioned conventional methods, the steps of placing discarded concrete for forming a stabilizer or a base and curing and solidifying the concrete, and placing and curing the fresh concrete after erecting and fixing the formwork on the solidified stabilizer are performed. It is common in that it comprises a solidification process. Therefore, the foundation work period should be at least the period from the start of the ground work to the end of the work to cast the discarded concrete for the formation of stabilizers, the period required for the curing and solidification of the discarded concrete, and the subsequent production between the forms. Since this is a period obtained by integrating the required period until the concrete pouring work is completed, the effect of shortening the construction period has not yet reached a satisfactory level in view of the background of the above-mentioned demands. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to erect and fix a ready-made reinforced concrete formwork at a foundation installation position and cast ready-mixed concrete into the formwork. In addition, it is an object of the present invention to provide a foundation method in which the formwork and the foundation are integrally joined and the formwork itself is used as a part of the foundation, whereby a further effect of shortening the construction period can be obtained. Means for Solving the Problems In order to achieve the above object, the present invention provides, at a foundation installation position, a stabilizing plate forming reinforcing bar, and a stabilizing plate forming form surrounding the reinforcing bar. On the inner side, a formwork positioning frame having a formwork mounting portion and legs extending downward from the formwork mounting portion, and communicating vertically and sideways, is installed taking the direction and level. After placing a tubular ready-made reinforced concrete formwork on the formwork positioning frame and arranging the reinforcing steel in the ready-made reinforced concrete formwork, the rebar is formed in the stabilizer plate forming form and the ready-made reinforced concrete formwork. The method is characterized in that concrete is put in, a stabilizer is poured, and the stabilizer, the ready-made reinforced concrete formwork and the foundation are integrally joined by curing and solidifying the raw concrete. Next, an embodiment of the present invention will be described with reference to the drawings in the order of steps. [First Step] (Form Forming) In the method according to the present invention, first, in a factory,
A reinforced concrete form A is manufactured in advance. The method of manufacturing the mold A is the same as the conventional method. As shown in FIG. 1, the mold A is formed between the molds 1 and 2 using metal molds 1 and 2 made of inner and outer metal plates or wooden boards. After the reinforcing reinforcing bar 3 joined in a lattice shape to the space to be formed is set so as to be located at the center of the space between the formwork, concrete is poured into the space between the formwork and cured, and after solidification, the form 1 , 2 are removed to produce a concrete form A as shown in FIG. Formwork A is based on the demand for the appearance of the foundation, or
Depending on the shape of the building provided on the foundation, it is formed into a polygonal cylindrical or cylindrical shape. In the case of the corner of the reinforcing bar 3 or in the case of a cylindrical form, an upwardly extending suspension ring 4 is previously joined at a symmetric position with respect to the center of the cylinder, and after the concrete form is manufactured, the suspension ring 4 is removed from the form A. By projecting, when moving the produced concrete form A to the storage position, or when transporting it to the foundation construction site and setting it at a predetermined position on the site as described later, the form A It can be lifted. As shown in FIG. 2, the concrete form A is provided with ribs 5 protruding from the inner wall surface and having embedded therein horizontal bars which are a part of the reinforcing bars 3 at appropriate intervals in the height direction of the form. It is provided with. As will be described later, the rib 5 firstly reinforces the strength against a force in a direction perpendicular to the wall surface of the form A itself, and increases the pressure resistance to the concrete flowing into the form. Second, to secure
It is provided to fulfill the two functions of determining the covering thickness of the reinforcing bars and anchors of the foundation provided in the formwork (thickness in which the concrete put into the form covers the reinforcing bars). [Second step] (Form transport / site installation) When constructing a concrete foundation, the above concrete form A is transported to the foundation construction site by a transport device.
Install in place. Since the concrete form A has the suspension rings 4 as described above, as shown in FIG. 3, hooks 7 fixed to the tip of a wire rope 6 or the like are hooked on each suspension ring 4, and the ropes are fixed to a fixed crane or a vehicle. The form A can be easily unloaded on a truck or other transport device and transferred to the site by being lifted and lowered by an upper crane, helicopter or the like. In addition, it can be easily installed at a predetermined position even on site. To install a foundation at a given location on a foundation construction site, a fourth
As shown in the figure, a ground operation is formed at the installation position by a conventional technique, and a formwork positioning frame 8 is erected and fixed on the upper surface thereof in an accurate direction and level. Formwork positioning frame 8
It has a mounting portion that matches with the lower end surface of the formwork A, and a mounting portion for mounting the mounting portion, and a leg portion extending downward from the mounting portion, and communicates laterally between the vertical direction and the leg portion. Since it is made lightweight in a frame shape, the direction and level can be set easily and accurately. The concrete formwork A is placed on the formwork positioning frame. Therefore, the direction and level of the mold A are also set accurately. And the formwork positioning frame 8
Is provided around the stabilizing plate reinforcing bar 9 and the stabilizing plate forming formwork 10. [Third Step] (Reinforcement / Anchor Installation) After the installation of the formwork A is completed as described above, the fourth step is performed.
As shown in FIG. 5 and FIG. 5, a reinforcing steel bar 11 for foundation and an anchor bolt 12 for fixing a building are arranged in the formwork A.
Since the concrete form A has a low deformation rate after molding, the covering thickness can be easily secured by contacting the reinforcing bar 11 with the rib 5 protruding from the inner surface of the form A. By setting the distance between the anchor bolt 12 and the inner surface of the upper end of the form A via the anchor support member 13 laid on the upper end of the form A, and fixing the anchor bolt 12 at a required position, the anchor installation position can be easily adjusted. And it can be determined accurately. As described above, since the form positioning frame 8 is accurately oriented and leveled, the upper end surface of the form A is also an accurate horizontal plane. However, an accurate level is assured, so that the anchor bolt 12 can be easily provided vertically. Hanging ring 4
Can also be used for positioning the anchor support member. [Fourth Step] (Concrete Injection and Curing) After the installation of the reinforcing bars 11 and the anchor bolts 12 in the form A is completed as described above, the ready-mixed concrete is then stabilized around the form A. It is poured into the plate forming mold 10 and the stabilizer 14 is cast therein, and its surface is leveled. Then, concrete is charged into the mold A and the bottom is filled into the stabilizer forming space from the bottom. Then, the ready-mixed concrete to be charged subsequently is filled into the formwork A. In this case, the pressure of the flowing concrete is applied to the inner wall surface of the form A, but the form A has the ribs 5 to eliminate the weak points of the concrete wall,
Since it has sufficient pressure resistance, there is no problem in strength even if the wall portion of the formwork A is relatively thin. When the strength is increased by providing the ribs 5 also serving as spacers as described above, the necessary pressure resistance is ensured, and the wall of the mold A is made thinner to reduce the total weight of the mold A, and the transport is performed. It is possible to reduce the load. When the concrete put into the formwork A solidifies, the desired foundation B is completed by removing the anchor support members 13 as shown in FIG. If necessary, after the curing and solidification, the mold 10 for forming the stabilizer is removed, and then the periphery of the foundation is backfilled and the stabilizer 14 is covered with earth and sand. If it is not necessary to remove the stabilizer-forming form or if there is not enough time, at the time when the ready-mixed concrete has been put into the form A,
In principle, the construction of the foundation is completed. FIG. 6 is a perspective view showing a completed state of the foundation B on which the stabilizer 14 is formed at the same time. The form A is integrally joined to the outer periphery of the foundation, and the anchor bolts 12 protrude from the upper surface of the foundation. Therefore, the building C can be fixed on this foundation by using anchor bolts and nuts as illustrated in FIG. The suspension ring 4 can also be used to pass a wire or the like that keeps the building in an upright state after the foundation is completed until the fastening of the building with the bolt and nut is completed. FIG. 8 shows that the suspension ring 4 of the form A is projected upward along the inner wall surface near the corner of the form A,
If you need to build tall foundation columns, use multiple formwork
When A ₁ and A ₂ are stacked, the suspension ring prevents the upper and lower forms A ₁ and A ₂ from moving relative to each other, so that ready-mixed concrete can be put into this form in a stable state. There is. Advantageous Effects of the Invention As described above, according to the present invention, the casting of the stabilizer and the casting of the base body can be performed at once by simply putting ready-mixed concrete into the mold for forming the stabilizer and the ready-made reinforced concrete form. Since the work can be performed, the work on the stable plate and the work on the foundation body are divided into two works in the construction period. Is shortened to Therefore, it is an effective and effective method for building foundations such as disaster prevention facilities that require urgent construction, and for buildings where construction is restricted seasonally, such as mountainous areas, and is also effective in preventing the spread of disasters. And can be unaffected by severe weather conditions. In addition, since the mold positioning frame communicating with the vertical direction and the side is used, the stabilizer and the base body are easily joined together integrally, so that a very solid foundation can be constructed as a whole.

BRIEF DESCRIPTION OF THE DRAWINGS The drawings explain embodiments of the present invention.
The figure is a perspective view showing an example of a process for manufacturing a reinforced concrete form, FIG. 2 is a longitudinal sectional view of a part of the concrete form,
FIG. 3 is a perspective view showing a state in which the completed concrete form is moved, FIG. 4 is a perspective view showing a state where the concrete form is installed on the site, and FIG. FIG. 6 is a perspective view showing a state in which a reinforcing bar and an anchor to be buried are attached, FIG. 6 is a perspective view of a completed foundation, and FIG.
The figure is a perspective view of an essential part showing an example in which a building is attached to a foundation, and FIG.
The figure is a partial front sectional view showing an example in which a plurality of molds are vertically connected. 3 ... reinforcing bar, 4 ... hanging ring, A ... reinforced concrete formwork, 5 ... rib 8 ... formwork positioning frame, 9 ... rebar for forming stable plate, 10 ... formwork for forming stable plate, 11 …… Reinforcing bar, 12 …… Anchor bolt, etc. 13 …… Anchor support member, 14 …… Stabilizer.

Continuation of front page    (56) References JP-A-48-58609 (JP, A)                 JP-A-61-126222 (JP, A)                 JP-A-54-137809 (JP, A)                 Japanese Utility Model Application No. 54-83056 (Japanese Utility Model Application Showa 56-               No. 865) and the specification attached to the application               Microfilm of the contents of the surface               (JP, U)

Claims (1)

(57) [Claims] (B) A reinforcing plate forming reinforcing bar and a stabilizer forming frame surrounding the reinforcing bar are installed at the foundation setting position, and a form placing portion and a mold are provided inside the stabilizer forming form. A frame positioning frame having legs extending downward from the frame mounting portion and communicating vertically and laterally is installed in a direction and at a level, and (b) a cylinder is mounted on the frame positioning frame. (C) After arranging a reinforcing bar in the ready-made reinforced concrete form, (d) ready-mixed concrete in the stabilizer-forming form and the ready-made reinforced concrete form. Injecting and setting a stabilizer, curing the ready-mixed concrete,
A concrete foundation method, wherein the stabilizer, the ready-made reinforced concrete formwork and the foundation are integrally joined.