JP2805613B2 - Construction method of reinforced concrete floor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a reinforced concrete floor using a plate-like block made of ceramic fired bricks or concrete as a formwork without introducing prestress or forming an arch or dome shape. ,
Moreover, almost no shoring is required.

[0002]

2. Description of the Related Art Concrete, ceramic fired bricks,
The floor of a building structure consisting of concrete blocks and stone materials should be constructed by placing rebar in a plywood formwork supported by a large number of supports from below, then placing concrete and drying. Although common, this construction method is cumbersome because it requires the provision of a large number of supports, is low in productivity, and is not economical. To solve this problem,
It is also known to use arches and dome shapes, or use long reinforced concrete panels, but the former is a buttress or horizontal steel member to prevent damage due to the horizontal force generated during construction. However, the latter requires a large and heavy handling member, and thus requires a large-sized machine. In addition, a method of introducing prestress into the latter is also known, but in this case as well, the problems of weight and economy remain unsolved.

[0003]

SUMMARY OF THE INVENTION The present invention uses a plate-like block made of concrete or the like as a formwork to provide a composite reinforced concrete floor composed of the plate-form form and cast concrete. An object of the present invention is to provide an inexpensive and easy construction method with little use, no introduction of prestress, and no arch or dome shape.

[0004]

According to the present invention, there is provided a method for constructing a reinforced concrete floor according to the present invention. Two plate-like forms having a cavity in one direction are supported by being inclined with respect to a horizontal line so that one ends in the longitudinal direction abut each other at a position higher than the support part, and
A linear iron connecting rod is horizontally arranged across the supporting portions, and both ends of the connecting rod are fixed to the supporting portion, and thereafter, a reinforcing bar is disposed on the plate-shaped form. It is characterized by flowing concrete and hardening it so as to fill the rebar.

The plate-shaped formwork used in the present invention is an extruded product made of high-strength ceramic fired brick, cement mortar, concrete or the like, and its length is set to about 1/2 of the span. For example, if the span is 6 m, it is set to about 3 m. The width and thickness are appropriately set in consideration of workability and strength.
000 mm, and the thickness is preferably 30 to 200 mm. The longitudinal cavity provided in this plate-shaped formwork may be either a hole penetrating in the longitudinal direction in which both upper and lower surfaces are closed or a longitudinal groove in which one of the upper and lower surfaces is open. The thickness and the number are also optional as long as the desired strength can be obtained.However, the inside of the groove-shaped cavity is filled with concrete when the concrete is poured by forming the cavity in a groove shape and using the open surface upward. Is possible,
It is effective for improving the strength of the floor.

In the present invention, two plate-shaped forms are arranged in abutting manner in the longitudinal direction, and at that time, the plate-shaped forms are inclined so that the abutting end is higher than the other end. The butted ends are pressed against each other by their own weight and by applying an external force as necessary. Therefore, the end face in the longitudinal direction of the plate-shaped form, especially the end face on the side to be the abutting end, is not a plane perpendicular to the upper and lower surfaces of the plate-shaped form, but is slightly inclined with respect to this perpendicular plane. Preferably, the angle of inclination is equal to the angle of inclination of the plate-shaped form with respect to the horizontal line, and when the end faces of the two plate-shaped forms are abutted against each other, the end faces are formed in a vertical plane so that the entire end faces are uniform. Preferably. In this case, after extruding the plate-shaped mold, the end face of the mold itself may be machined and inclined, and the end face of the mold itself is formed perpendicular to both upper and lower surfaces, and this vertical end face is formed. Hard rubber, wood,
A wedge-shaped contact plate made of mortar or the like may be attached or simply contacted.

[0007] When the two plate-shaped forms are respectively inclined and abutted on a mountain shape, the gradient is 1/100 to 20 /.
100 is preferred. If this gradient is smaller than 1/100, it tends to collapse under vertical load, and conversely 20/100
If it is larger than this, the thickness of the entire floor becomes excessively large, which is not economical.

[0008] A supporting portion such as a wall or a beam for fixing the other end of the plate-shaped formwork receives a vertical load and a longitudinal compressive load applied to the plate-form form. A receiving member for supporting the end of the plate-shaped form from below on the opposing surface of the support portion may be provided so that the end surface of the plate-shaped form comes into contact with the opposing surface of the support portion itself, This eliminates the need for a support to support the other end of the plate-shaped form from below, and only requires the support of the abutting end from below, thus significantly reducing the number of supports. And the man-hours required for floor construction work can be saved.

In the present invention, a linear iron connecting rod is horizontally supported between the two supporting portions together with the plate-shaped formwork,
This reinforces the support. That is, by abutting the two plate-shaped forms in a mountain shape, a longitudinal compressive stress is generated in the plate-shaped forms, and this is applied to the support parts such as the above-mentioned walls and beams as horizontal force, so that the distance between the support parts is reduced. However, by connecting the supporting portions such as walls and beams with the connecting rods, it is not necessary to increase the size of the supporting portions themselves such as walls and beams. The arrangement height of the connecting rod is arbitrary, but a height range between one end and the other end of the plate-shaped form is preferable in view of the reinforcing effect. In particular, when it is arranged so as to pass above the bottom surface of the cavity at the abutting portion of the two plate-shaped forms,
This is preferable in that the connecting rod is not exposed below the plate-shaped form, and the space below the plate-shaped form is widened. In some cases, the arrangement of the connecting rods may also serve as a reinforcing bar, and the arrangement of the reinforcing bars may be omitted.

In the case where the inclination of the plate-shaped form between the supporting portions is relatively small, the connecting rod can be passed through the cavity of the plate-shaped form over the entire length, and the connecting portion to the supporting portion can be formed. Can be positioned at substantially the same height as the other end fixing portion of the plate-shaped formwork. Conversely, when the above gradient is relatively large and only the center part of the connecting rod is housed in the cavity near the abutting part of the plate-shaped form, the remaining both sides are exposed above the plate-shaped form. However, when the above-mentioned cavity is an upper surface closed type hole, a hole for passing the connecting rod is formed in the upper surface of the plate-shaped formwork. The thickness and arrangement density of the connecting rods can be appropriately set within a range where the above-described reinforcing effect can be obtained. Further, at the time of construction, connecting rods may be arranged at both the high position near the abutting portion and the low position near the supporting portion, and after the concrete is dried, the lower connecting rod may be removed, and only the upper side may be left.

In the present invention, after the plate-shaped form and the connecting rod are supported between the supporting portions as described above, a reinforcing bar is disposed above the plate-shaped form, and concrete is poured and dried.
When pouring concrete, pull the butted portion of the plate-shaped form from below or push down from above to urge the butted portion downward, pour the concrete in this state, and after hardening the concrete, It is preferable to release the urging, whereby a compressive stress in the longitudinal direction is generated in the plate-shaped form, and the floor strength can be increased.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 A specific calcined inorganic material using a hydraulic substance such as cement as a binder is molded by an extruder to produce a hollow plate-shaped formwork 10 shown in FIGS. 2 and 3. In the plate-shaped form 10, a plurality of holes 11 penetrating in the length direction are arranged in parallel, and a groove 11a formed by dividing the hole 11 into two is formed on both left and right sides to form a cavity. And both end surfaces 12 in the longitudinal direction.
Is formed on a slope inclined with respect to a plane perpendicular to both the upper and lower surfaces, and the inclination angle θ is 1/100 to
It is set to the smaller side within the range of 20/100.

As shown in FIG. 1, the plate-shaped form 10 is supported such that one end thereof abuts between two opposing walls (support portions) 13 and 13 and is inclined at the above-mentioned small gradient. Is done. A receiving member 14 is fixed to the opposing surface of the wall 13 in advance, and the other end of the plate-shaped form 10 is placed on the receiving member 14, and the other end surface contacts the surface of the wall 13. The butting end is supported by the shoring 15 from below.

In FIG. 1, an iron connecting rod 16 is passed between the left and right walls 13 and 13 so as to pass through holes (cavities) 11 of two left and right plate-shaped forms 10 which abut the above-mentioned chevron. A nut 17 is fastened to a threaded portion of the connecting rod 16 protruding outward from the wall 13, whereby both ends of the connecting rod 16 are fixed to the wall 13. And, the plate-shaped form 10
After arranging a number of reinforcing bars 18 horizontally above the concrete, concrete is poured thereon, and the abutting portion of the plate-shaped form 10 is pushed downward by the weight of the concrete, so that the longitudinal direction of the plate-form Then, a compressive stress is generated and dried to form a cast concrete 19 integral with the plate-shaped formwork 10.

Embodiment 2 The connecting rod 16 is formed by setting the inclination angle of the end face 12 of the plate-shaped form 10 of the above-described embodiment 1 to be relatively large and setting the slope for supporting the plate-shaped form 10 to be relatively large. The hole (hollow)
If it is not possible to pass through the hole 11 in a straight line, a hole communicating with the hole 11 is opened in the upper surface on the other end side (the wall 13 side) of the plate-shaped formwork 10, and both ends of the connecting rod 16 are projected from this hole. Wall 13
Fixed to Otherwise, the cast concrete 19 is formed in the same manner as in the first embodiment.

Embodiment 3 In Embodiment 3 shown in FIG. 4, a plate-shaped form 10A is formed in the same manner as in Embodiment 1 except that the longitudinal end surface is formed perpendicular to both upper and lower surfaces. A wedge-shaped thick contact plate 21 is provided at the abutting portion of the two plate-shaped forms 10A.
In addition, a wedge-shaped thin contact plate 22 is interposed between the other end of the plate-shaped form 10A and the wall (support portion) 13, respectively. To construct.

Embodiment 4 A plate-shaped mold 10B shown in FIG. 5 is the same as Embodiment 1 except that four groove-shaped cavities 11B whose upper surfaces are opened are arranged side by side. Except for using the frame 10B, the cast concrete integrated with the plate-shaped form 10B is formed in the same manner as in the first embodiment. In this case, when the plate-shaped form 10B is assembled and concrete is poured, the concrete is also filled in the groove-shaped cavity 11B, so that the bonding strength between the cast concrete and the plate-shaped form 10B is improved.

Embodiment 5 A plate-shaped form 10C shown in FIG. 6 is the same as Embodiment 4 except that it has one large groove-shaped cavity 11C having an open upper surface. Except for using 10C, cast concrete is formed in the same manner as in Embodiment 4. Also in this case, the channel-shaped cavity 11C is filled with concrete,
The bonding strength between the cast concrete and the plate form 10C is improved.

Embodiment 6 Embodiment 6 shown in FIG. 7 is different from Embodiment 5 in which the plate form 10C of FIG. 6 is used, in that the inclination angle of the plate form 10C is in the range of 1/100 to 20/100. By setting the slope to be relatively large, more specifically, by setting the above gradient to be larger than the value obtained by dividing the depth of the groove-shaped cavity 11C of the plate-shaped form 10C by the length of the plate-shaped form 10C, Both ends other than the center of the connecting rod 16 are located outside the plate-shaped formwork 10C, and the other parts are poured with concrete in the same manner as in the fifth embodiment, and the groove-shaped cavities 11C of the plate-shaped formwork 10C are formed with this concrete. The cast concrete 19A is formed by filling. In this case, the connecting rod 16 may also function as the reinforcing bar 18 shown in FIGS. 1 and 4 and the reinforcing bar 18 may be omitted.

Seventh Embodiment A seventh embodiment shown in FIG. 8 is different from the sixth embodiment shown in FIG. 7 in that the temporary connecting rod 16A is provided separately from the upper connecting rod 16 between the lower working points of the left and right plate-shaped forms 10C. That is, the other ends of the left and right plate-shaped forms 10 </ b> C are supported between the portions contacting the wall 13,
At this time, the temporary connecting rod 16A is inserted into a hole formed in the bottom surface on the other end side of the plate-shaped formwork 10C, and the nut 17 is fastened and fixed outside the wall 13. And arrange the reinforcing bar 18A appropriately,
After casting concrete and drying, the above temporary connecting rod 1
6A is removed or cast concrete 19B is formed without removal. The upper connecting rod 16 may also serve as the upper reinforcing bar 18A, and the reinforcing bar 18A may be omitted.

Eighth Embodiment In the seventh embodiment shown in FIG. 8, except that the temporary connecting rod 16A is omitted, the concrete 19 is poured.
Form B.

[0022]

As described above, according to the first aspect of the present invention, a composite form composed of a plate-shaped form made of concrete, ceramic fired brick, or the like, and a cast-in concrete with a reinforcing bar laminated thereon is provided. A reinforced concrete floor is obtained. At that time, as a plate-shaped form, having a cavity in the length direction,
A relatively light plate-shaped formwork with excellent bending strength is used, and the two plate-shaped forms are abutted in a chevron, so the number of supports for supporting the plate-shaped formwork from below is greatly reduced. Moreover, this reduction increases the space below the plate-shaped formwork, and as a result, construction efficiency is greatly improved.

Since the support portions at both ends of the plate-shaped formwork butted in a chevron are connected horizontally by linear connecting rods, no stress is generated in the support portions and the length of the plate-shaped formwork is reduced. Compressive stress can be generated in the vertical direction, and it is not necessary to particularly increase the size of the walls and beams constituting the support portion, and the mass of the composite reinforced concrete floor as a whole in the composite form can be reduced, In addition, it is possible to prevent cracks due to shrinkage of the cast concrete. In addition, concrete is cast on a plate-shaped formwork that faces the chevron, so that the composite floor as a whole is thinnest at the center with the minimum bending moment and thickest at both ends with the maximum bending moment. Thus, the shape can be made mechanically efficient.

According to a second aspect of the present invention, in the first aspect of the present invention, the longitudinal end face of the plate-shaped mold is inclined with respect to a plane perpendicular to the upper surface of the plate-shaped mold, and the angle of the inclination is set. Since the inclination angle of the plate-shaped form when supporting the plate-shaped form between the supporting parts is set to be equal, when the ends of the two plate-shaped forms are abutted against each other, the entire end surfaces thereof come into contact with uniform pressure. And the durability is further improved in addition to the above effects.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the connecting rod is passed through a portion above the bottom surface of the cavity at the abutting portion of the two plate-shaped forms. Since the connecting rod is arranged, the connecting rod is not exposed to the space below the plate-shaped formwork, so that the lower space can be widely used.

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, concrete is flowed in a state where the butted portion of the plate-shaped form is urged downward, and after the concrete is hardened. Since the above-mentioned bias is released, it is effective in adjusting the stress generated in the plate-shaped formwork.

According to a fifth aspect of the present invention, in the invention of any one of the first to fourth aspects, a receiving member for supporting the end of the plate-shaped form from below on the opposing surfaces of the two support portions. And the end face of the plate-shaped form is brought into contact with the above-mentioned facing surface, so that a support work for supporting the end of the plate-shaped form from below is unnecessary, and the number of the support works is saved accordingly, In this case, the number of man-hours is reduced, and the space below the plate-shaped form is widened.

[Brief description of the drawings]

FIG. 1 is a sectional view of a first embodiment.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a longitudinal sectional view of a form member.

FIG. 4 is a sectional view of a third embodiment.

FIG. 5 is a transverse sectional view showing a mold member according to a fourth embodiment.

FIG. 6 is a transverse sectional view showing a mold member according to a fifth embodiment.

FIG. 7 is a sectional view of a sixth embodiment.

FIG. 8 is a sectional view of a seventh embodiment.

[Explanation of symbols]

 10, 10A, 10B, 10C: Plate form 11: Hole (hollow) 11a: Groove 11B, 11C: Groove hollow 12: End face 13: Wall (supporting part) 14: Receiving member 15: Shoring 16: Connecting rod 16A: Temporary connecting rod 17: Nut 18, 18A: Reinforcing bar 19, 19A, 19B: Casting concrete 21, 22: Wedge-shaped contact plate

Claims (5)

(57) [Claims] 1. A two-plate form having a longitudinal cavity formed in a rectangular plate shape and having a lengthwise cavity between two support portions formed of walls, beams, and the like facing apart in the horizontal direction. One end in the direction is inclined with respect to a horizontal line so as to abut each other at a position higher than the support portion, and is supported by being inclined with respect to a horizontal line, and a linear iron connecting rod is horizontally arranged across the two support portions, Fixing both ends of this connecting rod to the above-mentioned support portion, and thereafter arranging a reinforcing bar on the plate-shaped formwork, flowing concrete to fill the reinforcing bar, and hardening the reinforced concrete floor, How to build. 2. The method for constructing a reinforced concrete floor according to claim 1, wherein a longitudinal end face of the plate-shaped form is inclined with respect to a plane perpendicular to an upper surface of the plate-shaped form, and the inclination angle is set to a supporting portion. A method of constructing a reinforced concrete floor which is set to be equal to the inclination angle of the plate form when supporting the plate form therebetween. 3. The reinforced concrete floor construction method according to claim 1, wherein the connecting rod is disposed so as to pass through a portion of the butted portion of the two plate-shaped forms above the bottom surface of the cavity. How to build the floor. 4. The method for constructing a reinforced concrete floor according to any one of claims 1 to 3, wherein the concrete is poured while the abutting portion of the plate-shaped form is urged downward.
A method for constructing a reinforced concrete floor that releases the above-mentioned bias after the concrete has hardened. 5. The method for constructing a reinforced concrete floor according to claim 1, wherein a receiving member for supporting an end of the plate-shaped form from below is provided on opposing surfaces of the two support portions. Then, a method of constructing a reinforced concrete floor in which part or all of the end face of the plate-shaped form is brought into contact with the above-mentioned opposing face.