JPS61113967A - Casting joint construction method of concrete in slab or beam - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a concrete pouring method used for constructing slabs, beams, etc. of concrete structures.

(Prior Art) In this type of pouring method using conventional technology, a wire mesh is generally used as a stop on the pouring side of the concrete, and the wire mesh prevents the poured concrete from flowing out. The joint ends of each reinforcing bar were made to pass through a mesh so that they protruded in parallel to the splicing side, and the wire mesh was buried.

(Problems to be Solved by the Invention) However, the above-described conventional technology has the following problems.

■The work of inserting the joint ends of the reinforcing bars through the wire mesh is complicated.

■In order to insert the reinforcing bars into the wire mesh, the mesh must be made somewhat large, and the slag tends to flow out through the mesh, making it impossible to apply a sufficient amount of vibrator.

■It takes time to finish because the net remains after demolding.

■Wire mesh used as gable end material cannot be used for other purposes because it is disposed of in landfills.

Therefore, it is an object of the present invention to provide a concrete pouring method that improves the problems caused by the conventional techniques described above.

(Means for solving the problem) In the construction method of the present invention, a hose that can be expanded in diameter is inserted between the reinforcing bars in advance as a stopper, and a fluid such as water or air is filled into the hose. By enlarging the diameter, C-stopping is performed on the splicing side while the joint ends of the reinforcing bars are being held.

After the poured concrete has hardened, the hose releases fluid and is removed, and then used as a stopper in the area where concrete is to be poured.

(Example) Examples of the present invention will be described below based on the drawings. 1st
The diagram shows slab 13! Fig. 2 shows a cross-sectional view of the first embodiment applied to the concrete construction. is a small diameter that can be expanded using rubber material, etc.
Hose 2 (approximately 2 inches in diameter) is installed in a U-shape. On the small-diameter hose 2, lower reinforcing bars 3 that are parallel to the splicing side are placed in parallel at predetermined intervals, and lower reinforcing bars 4 that are superimposed on these lower reinforcing bars 3 and perpendicular to the splicing side are placed at predetermined intervals. Arrange them in parallel with each other, and tighten the intersections with iron wire, etc.

Next, a large diameter (approximately 4 inches in diameter) hose 5 made of rubber material or the like is installed in a U-shape on the lower reinforcing bar 3.4 on the splicing side. Then, on the large-diameter hose 5, the upper reinforcing bars 6 parallel to the splicing side and the upper reinforcing bars 7 orthogonal to each other are superimposed and tightly bonded to each other and placed in the same manner as described above. In addition, the pouring side of the lower reinforcing bar 3 and the upper reinforcing bar 6 has joint ends 3a and 5a for connecting with reinforcing bars in the next concrete placement area.
As a result, each hose 2.5 is installed protruding from the installation position.

Next, water is injected into the small-diameter hose 2 and the large-diameter hose 5 by a water pump (not shown), and the diameters are expanded by expansion due to the water pressure 9.
A square lumber 8 is placed on the splicing steel 7 and tightly attached to the upper reinforcing bar 6 by iron wire 9. Therefore, the lower reinforcing bars 2 and 3 are sandwiched between the small diameter hose 2 and the large diameter hose 5, and the upper reinforcing bars 6 and 7 are sandwiched between the large diameter hose 5 and the square timber 8. Wife stoppage is carried out. Then, concrete 10 is placed in a concrete placement area formed by the cooperation of these gables and the formwork 1 made by fI4,
Once the concrete has hardened, the submersible pump or the like is operated to release the water in each hose 2.5, and then each hose and square timber are removed.

Similarly, the slab is completed by reusing the removed materials and successively repeating concrete pouring for adjacent areas.

(Other Embodiments) The plan view in Fig. 3 and the sectional view in Fig. 4 show slab construction according to the second embodiment, and the same components as in the first embodiment are designated by the same reference numerals. This will be explained below.

This embodiment is mainly applied when the slab is thicker than the first embodiment, and there is a small diameter between the steel formwork 1 and the lower reinforcing bars 3.4, which are important for demolding, as in the above embodiment. A fine wire mesh 11 is stretched between the lower reinforcing bars 3° 4 and the upper reinforcing bars 6 and 7, and the upper reinforcing bars 6 are placed outside of the wire mesh 11.
A coarse wire mesh 12 is stretched and reinforced through which the joint ends 5a, 3a of the lower iron Ta3 are inserted.

Therefore, demolding is easy due to the hose 2 having a smaller diameter than the end stopper according to the conventional technique, and insertion of each reinforcing bar is also easier due to the wire mesh 12.

Next, a third embodiment in which the present invention is applied to the construction of beams will be described with reference to FIGS. 5 to 7. Note that illustrations and illustrations of the formwork are omitted. As shown in FIGS. 5 and 6, upper beam reinforcing bars 21 and lower beam reinforcing bars 22 are protruded in parallel from the concrete-cast beam 20 to the pouring joint side, and the gaps between these reinforcing bars are A hose 23 is arranged in parallel with each other to perform end stop. As shown in FIG. 7, the bottom of the hose 23 is closed by an iron plate 24, etc., and a water supply valve 25 and an air handling valve 26 are attached to the upper part.
By adjusting the diameter, the hose 23 is expanded or contracted as appropriate, and when the diameter is expanded, the splicing side is held in place.

Furthermore, the present invention is not limited to these embodiments (the invention can be modified in various ways within the scope of the gist; for example, instead of injecting water, the diameter of the hose may be expanded by the pressure of a fluid such as air). You can also do this.

(Effects of the Invention) As is clear from the above embodiments, the concrete pouring method of the present invention provides the following effects.

■Construction time can be shortened because the end stop material can be easily attached and detached.

■Compared to gables using wire mesh, there is less slag (to the extent that it can be washed with water), and a sufficient amount of vibrator can be applied, resulting in a high-quality concrete structure.

■Easy to demold and good finish after demolding.1
be.

■It is economical because the end stopper material can be reused.

[Brief explanation of the drawing]

The drawings all show embodiments of the present invention, and the first
The figure is a front view of the first embodiment applied to slab construction;
Fig. 2 is a longitudinal sectional view of the same, Fig. 3 is a front view of the second embodiment similarly applied to slab construction, Fig. 4 is a longitudinal sectional view of the same,
Figure 5 is a front view of the third embodiment applied to beam construction;
FIG. 6 is a longitudinal sectional view of the same, and FIG. 7 is an enlarged front view of the hose. [Explanation of symbols] 1...Steel formwork 2.5.23...Hose 3
．． 4.6,7.21.22...Reinforcement bar 8...Ice cube material
9... Steel wire 10... Concrete 11.
...Wire mesh 12...Wire mesh 20...Beam 24...Iron plate 25...Water tap 26...Air vent plug Figure 1 Figure 2 Procedure page 1ljj Hem February 1986 5-day revision office 1 (Kanyu de j Tsutsubu dono 1, Indication of the case Patent application No. 1987-232/140 2, Title of the invention
Concrete pouring method 3 for slabs, beams, etc., relationship with the case of the person making the amendment Patent applicant Representative director and president Town EFI Ryoji 5, H-J of amendment order Voluntary amendment 6 Subject of amendment
-1. 7. Contents of amendment (1) The claims of the present application are amended as separate claims. (2) "A hose whose diameter can be expanded" in lines 5 and 6 of page 3 of the specification is changed to "a hose whose diameter can be expanded and contracted in a reduced diameter state" and "the hose in line 11 of the same page" . . . The diameter expansion U" is changed to ``At that moment, the hose is expanded in diameter,'' and in the 11th line of the same page, ``The end stop...the said Bose'' is changed to ``The hose is stopped at the end.'' ,
"The said hose" in the 11th line of the same page, "release the fluid", "re-reduce the diameter", and the 18th line of the same page, "reduce the diameter"
Correct "Mekuform" and "Metalform" respectively. (3) Correct "1 lower reinforcing bar 2.3" from page 4, line 20 to page 5, line 1 of the same agreement to "lower reinforcing bar 3.4." 8. List of attached documents amended scope of patent claims 1 copy of claims In the concrete pouring method for slabs, beams, etc., there is a diameter between the joining ends of each reinforcing bar that protrudes parallel to the pouring side. A hose that can be expanded and contracted is inserted in advance in a reduced diameter state, and then the diameter of the hose is expanded and end stops are performed, concrete is poured into a formwork that cooperates with the end stops, and the concrete is hardened. 1. A concrete pouring method for slabs, beams, etc., characterized in that the diameter of the hose is reduced again after the above-mentioned steps have been carried out, and then the hose is removed. ? Proceedings Nera Official Book February 6, 1986 Director General of the Patent Office Mr. Ubuya Michibu 1, Indication of the case Relationship with the case of patent application No. 59-232440 Patent applicant Representative Director and President Ryoji Machida, Ryoji 5. Amendment Date of Order Voluntary Correction
7) 7. Contents of amendment (1> The following sentence is added between the second and third lines of page 7 of the specification. [Figures 8 and 9 show the fourth embodiment of the present invention. The hose 30 according to the present embodiment has a convex portion 31 and a concave portion 3 on the side wall.
It has a bellows shape in which 2 are alternately formed. Therefore, when the fluid is not filled, the diameter is in a contracted state as shown in FIG. 8, but when fluid is filled from the injection port (not shown), the side wall expands and the diameter is expanded as shown in FIG. 9. Become. In the hose 30 of this embodiment, by adjusting the filling and crushing of fluid etc., the diameter in the expanded state can be varied over a wide range compared to a hose with a circular cross section, so even if the area of the joint part changes. The same boss can be used. Note that the reference numeral 33 is a bulging prevention member provided on the inner wall of the recess 32. In addition, instead of filling the water or air to expand the diameter of the hose, a tablet that generates expansion gas is sealed (21).
Even 7 is white. 10 and 11 show a fifth embodiment of the present invention. In each of the embodiments described above, the hose is filled with fluid and the hose is expanded in diameter by the fluid pressure, but in this embodiment, the diameter can be expanded or contracted mechanically. That is, the hose 40 has a butterfly-shaped (X) cross-sectional shape and is formed so that its diameter can be expanded and contracted up and down by pleated side walls 41 and 42, and a support rod 43 is inserted into the hose along the longitudinal direction. In addition, a plurality of diameter expanding plates 44 whose bases are attached to the support rods 43 are provided at predetermined intervals. The diameter-expanding plate 44 includes a pair of diameter-expanding pieces each extending upward and downward in a slanted shape and forming a dogleg shape, and the tip of the diameter-expanding plate 44 is connected to the hose 4.
It is in contact with the upper and lower inner wall surfaces of 0, respectively. Further, a spring 45 is wound around one end of the support rod 43 to bias the diameter expanding plate 44 in the direction of reducing the diameter as shown in FIG. Part support rod 43
A nut 46 is screwed into the shaft as a screw shaft, and a handle 47 is provided at the end of the support rod. The expanded diameter plate 43 may be made of a plastic material with a bent portion at its base, or may be made of a metal plate with a hinge interposed therebetween. When expanding the diameter of the hose 40 which is in the reduced diameter state as shown in FIG. 10, when the handle 47 is pulled, the diameter expansion plate 44 is subjected to a pulling force to the right in the drawing against the elasticity of the coil spring 45. Since the distal ends of each diameter-expanding piece of the diameter-expanding plate 44 are respectively locked by the upper and lower inner walls of the hose 40, only the base side is pulled and gently deforms into a dogleg shape or an upright shape, as shown in FIG. The diameter is expanded in the vertical direction, and in this state, the nut 46 is screwed onto the threaded shaft of the support rod 43 and fixed. (2) "This is an enlarged front view" on page 8, line 8 of the specification. The figure is a longitudinal cross-sectional view in the reduced diameter state, Figure 9 is a longitudinal cross-sectional view in the expanded diameter state, Figures 10 and 1.
Figure 1 shows the $-2 shape according to the 51st embodiment. Figure 10 (°) is a longitudinal cross-sectional view along the longitudinal direction in the reduced diameter state, and Figure 10 (b) is a longitudinal cross-sectional view along the width direction. FIG. 11(a) is a longitudinal sectional view taken along the longitudinal direction in the expanded diameter state, and FIG. 11(b) is a longitudinal sectional view taken along the lateral direction. (3) Figures 8 to 11 are added as attached. 8. Attached delivery inventory drawings (Figures 8 to 11) At least one copy each...:l

Claims (1)

[Claims] In the concrete pouring method for slabs, beams, etc., an expandable hose is inserted in advance between the joining ends of each reinforcing bar that protrudes parallel to the pouring side, and fluid is injected into the hose. and expanding the diameter of the hose using the fluid pressure to perform an end stop, pour concrete into a formwork that cooperates with the end stop, and after the concrete hardens, release the fluid in the hose, A concrete pouring method for slabs, beams, etc., characterized in that the hose is then removed.