JP2851463B2 - Construction method and cast-in hollow formwork of reinforced concrete diagonal roof. - 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 of constructing a reinforced concrete diagonal roof using a semi-finished precast concrete diagonal roof base plate (hereinafter referred to as a half-Pca diagonal roof base plate) and a half-Pca diagonal roof base plate. The present invention relates to a hollow hollow formwork for reinforced concrete diagonal roofs to be arranged.

[0002]

2. Description of the Related Art Conventionally, a reinforced concrete diagonal roof formed on a reinforced steel building or a reinforced concrete building is exclusively formed by a cast-in-place method, and is constructed, for example, as shown in FIG. In addition, in FIG. 3, the steel frame and the rebar are all omitted.

[0003]

However, in this case, as shown in FIG. 3, in addition to the receiving beam a, a ridge beam b and a large number of oblique beams (small beams) c are required, and the structure becomes complicated. Requires a lot of labor and materials. Complex diagonal roof forms, a large amount of shoring and support are required, and furthermore, shoring by a framework is required, and assembling and disassembling these requires a great deal of labor (usually 1.
5 to 2 times). It requires a lot of rebar work at diagonal places in high places, which is not only difficult, but also dangerous. The concrete joint portion d is formed below the beam of the receiving beam a, which easily causes water leakage at the outer wall e and the like. It is not easy to level the cast concrete, and it is necessary to use a scaffold plate or the like to stop dripping. Poor construction efficiency, long construction period and high cost. It requires a large number of skilled workers for various operations, and construction is extremely difficult in recent years when labor is short. There are problems. Therefore, the first aspect of the present invention is to solve the problems by appropriately using a half-Pca diagonal roof base plate and a driving hollow formwork. By the way, when the driving hollow formwork having a vertical front surface is arranged on a half-Pca diagonal roof base plate having a predetermined gradient, the front surface facing the skirt of the gradient is set so as to be inclined forward to cover. Depending on the condition of the slope, the concrete may not be sufficiently filled in the section or the density may decrease. In view of this, the invention of claim 2 aims to eliminate such inconvenience by giving a predetermined shape to the driven hollow formwork.

[0004]

In order to achieve the above object, according to the first aspect of the present invention, a joint surface is provided on an upper part of a steel beam or a reinforced concrete receiving beam which has been previously struck, and the joint surface is formed on an oblique roof. A half Pca diagonal roof base plate is erected on the inner edge of the joint surface, and a hollow hollow form is placed at various positions on the half Pca diagonal roof base plate. In addition, there is provided a method of constructing a reinforced concrete diagonal roof, comprising arranging an upper reinforcement, pouring a diagonal roof concrete, and joining the receiving beam to the receiving beam at the joint surface.

[0005] A second aspect of the present invention is for a reinforced concrete diagonal roof characterized in that the front and rear surfaces of a hollow hollow form body having a square planar shape disposed on a half-Pca diagonal roof base plate are tapered. It is in a driven hollow formwork.

[0006]

According to the first aspect of the present invention,
The completed reinforced concrete diagonal roof is hollow and lightweight with a driven hollow formwork, eliminating the need for a ridge beam and diagonal beams (small beams). In addition to eliminating the need for various supports, supports, etc., it also reduces the work of arranging reinforcement at diagonal places at high places. The joint surface formed at the outside low minimizes water leakage, and the hollow hollow formwork arranged at various places on the half-Pca diagonal roof base plate is not only lightweight, but also drip-proof by scaffolding boards of cast concrete. And make it easier to level out, so they work together
Improve work efficiency and quality, reduce construction period and cost, and reduce the number of general and skilled workers.

According to the second aspect of the present invention, the hollow hollow form body having the tapered front and rear surfaces faces the skirt of the slope of the half-Pca diagonal roof base plate on the half-Pca diagonal roof base plate. The front surface is not covered forward, thereby eliminating insufficient filling of concrete in the portion and a decrease in density.

[0008]

FIG. 1 shows an embodiment according to the first aspect of the present invention. Hereinafter, the method of construction will be described according to the procedure. 1. A joint face 2, which is inclined to the inside height and outside height to be equal to or almost equal to each slope of the gable-shaped diagonal roof, on the pair of front and rear steel beam reinforcing bars or reinforced concrete beams 1, 1.
Form 2 In FIG. 1, the steel frames and reinforcing bars of the receiving beams 1, 1 and the outer walls 3, 3 are omitted. In FIG. 1, reference numeral 4 denotes a wall beam. 2. Gable half Pca diagonal roof base plate 5 is erected with a crane or the like, and erected on the inner edges of the joint surfaces 2, 2.
Assemble the peripheral formwork and shoring. This half Pca diagonal roof base plate 5 is manufactured in advance at the site or factory, and the lower surface is completed, and the upper surface is unfinished.
And, the thickness is formed to be less than half of the roof thickness, and the lower end streaks 52 of the roof are driven into the concrete 51, and the omnier streaks, Kaiser streaks 53 or wave streaks are joined to the lower streaks at the lower end and moved upward. Protrude. 3. A large number of hollow rectangular form-forms 6 of a flat rectangular shape are appropriately arranged and fixed at various places on the half-Pca diagonal roof base plate, and the top end streaks 7 of the roof are arranged, and the omnia streaks and Kaiser are arranged. Reinforcement 53 or upper end of wave rein and beam 1,
1 and rebar. A molded product of foam polystyrene resin (for example, “Eslen void” of Sekisui Plastics Co., Ltd.) or the like is used as the hollow hollow mold 6. It is desirable that this step be performed at an on-site site as much as possible at the time of manufacturing the half Pca oblique roof base plate 5 or thereafter. This is for minimizing work in dangerous high places and oblique places. 4. Placing the slanted roof concrete 8 and joining the two receiving beams 1 and 1 at the joint surfaces 2 and 2 respectively. 5. After the predetermined strength is developed on the diagonal roof concrete 8, the peripheral formwork and the support are dismantled and removed.

FIG. 2 shows an embodiment according to the second aspect of the present invention. In this case, the half Pca diagonal roof base plate 5
The front and rear surfaces 62, 63 of the main body 61 are formed as tapered surfaces having an angle set so that the front surface 61 is vertical when the front surface 61 is mounted in the hollow hollow formwork 6 having a square planar shape disposed thereon. .

[0010]

Therefore, according to the first aspect of the present invention, a hollow and lightweight roof can be formed by the driven hollow formwork, so that a ridge beam and an oblique beam (small beam) can be eliminated, and the structure can be simplified. , Labor and materials can be greatly reduced. Since the half Pca diagonal roof base plate is used, complicated diagonal roof formwork, a large amount of various supports and supports, etc. can be made useless, and a great deal of labor is required for assembling and disassembling them (usually 1.5 to Labor, which is about twice as much). Since the half-Pca diagonal roof base plate appropriately arranged in advance is used, it is possible to reduce the work of arranging reinforcing bars at high places and diagonally, and to simplify the work and reduce the danger. Since the joint surface is formed at the upper part of the receiving beam at the same or substantially the same slope as the half-Pca oblique roof base plate, and with the inner height and the outer height lowered, water leakage can be minimized. Since the hollow hollow formwork is arranged at various places on the half-Pca oblique roof base plate, in addition to the above-mentioned weight reduction, it is not necessary to stop dripping by a scaffold plate or the like of cast concrete, and the leveling can be facilitated. As described above, the work efficiency and quality can be improved, and the construction period and cost can be reduced. Further, the number of general workers and skilled workers can be reduced, and labor shortages can be eliminated. And so on.

According to the second aspect of the present invention, since the front and rear surfaces of the hollow hollow form body are formed as tapered surfaces, the inclination of the half-Pca diagonal roof substrate on the half-Pca diagonal roof substrate. The front surface facing the hem does not fall forward, the portion can be sufficiently filled with concrete, and the density does not decrease.

[Brief description of the drawings]

FIG. 1 is a sectional side view according to the first aspect of the present invention.

FIG. 2 is an enlarged sectional side view of a main part according to the invention of claim 2;

FIG. 3 is a sectional side view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Receiving beam 2 Connecting surface 3 Exterior wall 4 Wall beam 5 Half Pca diagonal roof base plate 6 Driving hollow formwork 7 Upper reinforcement 8 Diagonal roof concrete 51 Concrete 52 Lower reinforcement 53 Kaiser reinforcement 61 Main body 62 Front 63 Rear

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-61-95166 (JP, A) JP-A-57-137548 (JP, A) JP-A-4-293836 (JP, A) (58) Field (Int.Cl. ⁶ , DB name) E04B 7/00 E04B 1/16 E04B 5/32

Claims (2)

(57) [Claims] A joint surface is provided on an upper part of a steel beam reinforced concrete or reinforced concrete beam that has been previously struck, and the joint surface is formed to have a height equal to or substantially equal to a slope of a diagonal roof, and to have an inner height and an outer height.
A semi-finished precast concrete slanted roof base is erected on the inner edge of the joint surface, and hollow molds are arranged at various places on the semi-finished precast concrete slanted roof base. A method for constructing a reinforced concrete diagonal roof, comprising casting concrete and joining the receiving beam to the receiving beam at the joining surface. 2. A hollow hollow formwork for reinforced concrete diagonal roofs, characterized in that the front and rear surfaces of a hollow hollow formwork body having a square planar shape disposed on a semi-finished precast concrete diagonal roof base plate are tapered.