JPH0765371B2 - How to build a sloping roof by concrete - Google Patents

Description

TECHNICAL FIELD The present invention relates to an improvement in a method for constructing a pitched roof made of concrete.

“Conventional technology” Conventionally, as a construction method for constructing a pitched roof with concrete, reinforcing bars that are the skeleton of a pitched roof are laid on a reinforced concrete structure, and a concrete formwork is assembled in the cycle of this reinforcing bar. Is generally practiced, and after the concrete is hardened, the formwork is removed to construct a concrete roof.

In this method, as a means for positioning the height of the top surface of the concrete roof (thickness from the formwork), as shown in FIG. 3, the reinforcing bar 1 is used above the reinforcing bars 1 arranged vertically and horizontally. Are welded with auxiliary reinforcements, etc., and positioning level reinforcements 2, 2, 2, ... Are arranged at equal intervals on a straight line equal to the height of the upper surface of the concrete roof, and concrete C is driven to the level reinforcements. The means of setting is used. Reference numeral 3 is a form, and reference numeral 4 is a concrete flow stop for preventing the overflow of the concrete C.

[Problems to be Solved by the Invention] However, according to the above-mentioned construction method, the pump hose 5 for discharging concrete when placing concrete is placed on the ridge 6 (that is, on the level line 2 of the ridge 6). For,
There is a problem that the level muscle 2 of the ridge 6 is bent downward. In addition, riding on the rebar 1 where workers are placed to perform concrete leveling work outside the ridge 6,
There is a problem that deformation occurs at various places, and the position of each level muscle 2 also changes accordingly.

Due to these problems, it was difficult to secure the positioning accuracy of the height of the upper surface of the concrete roof with the level reinforcement 2, and it was impossible to drive all the parts accurately and flatly. In addition, the fact that a worker rides on the formwork 3 at the eaves side and lowers the angle of the formwork 3 has also been a factor.

Further, since the level reinforcement 2 is exposed from the concrete, there is a problem that rust is generated on the surface of the concrete roof and water leaks from a slight gap between the level reinforcement 2 and the concrete C.

Due to the above problems, additional costs and time are required for repairing the concrete roof such as refinishing of the concrete roof and work for water leakage protection, resulting in an increase in cost.

"Means for Solving Problems" The present invention is directed to arranging a pitched roof and providing a formwork around it to construct concrete by forming concrete in the formwork. The construction method is characterized in that a line is set up from the ridge part of the pitched roof to the eaves part as a standard for the height of the top surface of the concrete roof, and the concrete is placed according to this line height. It is a thing.

"Action" The sloped roof is laid out and a formwork is installed around it, and a line is set up from the ridge to the eaves of the sloped roof to serve as the standard height of the concrete roof. If concrete is poured together, the top surface of the concrete roof becomes parallel and flat along the line. Further, since the line is stretched, it can be restored to its original state or re-stretched even if it is squeezed by an operator or the like, so that the height standard can be maintained accurately.

[Examples] Examples of the present invention will be described below with reference to the drawings. 1 and 2 show an embodiment of the present invention, in which the same members as those in the conventional example of FIG. 3 are designated by the same reference numerals.

In these drawings, reference numeral 1 is a reinforcing bar that forms the skeleton of a pitched roof, and this reinforcing bar 1 is formed above a building structure composed of columns and beams. Around the rebar 1, there is provided a form 3 which forms the outer shape of a pitched roof while leaving the upper surface. Of these, the formwork 3 of the eaves part 7 is a support (supporting work) 8
Supported by. An auxiliary bar 9 is integrally provided on the top of the reinforcing bar 1 by welding, and a ridge beam 10 (an angle member) forming the ridge 6 is horizontally provided on the ground at the tip of the auxiliary bar 9. It is provided. And master beam 10
One end of a wire rope (line) 11 is detachably attached to the at equal intervals.

This wire rope (line) 11 serves as a standard for the height of the concrete C to be placed in the form 3, and the wire rope 11 is stretched from the ridge portion 6 to the eaves portion 7 at the time of placing concrete, and the tip portion (others) The end portion) is hung on the column 8 or the like via a tan buckle 12 for adjusting the tension of the wire rope 11.

A cap 13 is attached to the lower end of the auxiliary muscle 9 to prevent rust and water leakage.

Next, a work procedure of a method of constructing a pitched roof made of concrete configured as described above will be described.

First, the reinforcing bar 1 that serves as the skeleton of a pitched roof is assembled on the structural building composed of columns and beams, and the reinforcing bar 9 from the top of the reinforcing bar 1
The ridge beam 10 is passed horizontally to the ridge section 6 via the
Forming 3 which becomes the outer shape of a pitched roof is provided around the upper surface of. After finishing the bar arrangement and the formwork work in this way, one end of each of the plurality of wire ropes 11 is attached to the ridge 6 at equal intervals and stretched from the ridge 6 to the eaves end 7, The other end of 11 is hung on the column 8. At this time, the tension of the wire rope 11 is suppressed to about 70%.
Then, in accordance with the height of the wire rope 11, concrete C is evenly poured from the ridge 6 to the eaves 7 by the pump hose 5 up to the level shown by the alternate long and short dash line in FIG. Then, the tension of the wire rope 11 is set to 10%, and the work for leveling the concrete C upper surface is performed according to the height of the wire rope 11. Finally, after removing the wire rope 11 and hardening the concrete roof, the formwork 3 is removed and finishing work is performed to complete the work.

According to this embodiment, since the ridge beam (angle member) 10 having a strong bending stress is passed to the ridge portion 6 via the auxiliary bar 9, even if the pump hose 5 is placed on the ridge beam 10, the ridge beam 10 is deformed due to its weight. If the wire rope 11 is stretched from the ridge beam 10 to the eaves end portion 7 without going down or down, the height of the upper surface of the concrete roof can be easily and reliably positioned. Moreover, in the unlikely event that the worker rides on the rebar 1, the rebar 1
Even if a part of it is deformed, it does not affect the tension of the wire rope 11, so that the accuracy of the upper surface height (punching height) of the concrete roof is always ensured. Also wire rope
The 11 is detachable, so its handling is easy.

As the line, instead of the wire rope 11,
A rubber material having elasticity may be used so that it can be returned to the original level even if it is stepped on by a worker during concrete pouring work, and in order to obtain the same effect, the wire rope 11
A rubber material may be extensible in a part (front end portion, rear end portion) of the above.

[Effects of the Invention] As described in detail above, according to the present invention, a line is set up from the ridge part of the pitched roof to the eaves part as a reference for the height of the upper surface of the concrete roof, and adjusted to this line height. Since the concrete is placed by pouring, the height of the upper surface of the concrete roof can be positioned extremely easily and reliably, and the concrete placing work and the finishing work can be smoothly performed. Moreover, if a plurality of lines are stretched at equal intervals along the roof, the entire roof can be driven accurately and flatly.

Further, since only the structural reinforcing bars are arranged inside the concrete roof, the generation of rust and water leakage due to the existing level reinforcing bars are eliminated.

Furthermore, as a result of the above, there is no need to perform repair work on the concrete roof such as refinishing the top surface of the concrete roof due to defective height of the top surface or water leakage protection work, so it is possible to reduce the construction period and cost, and thus realize cost reduction. Can be achieved.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention, wherein FIG. 1 is a sectional view of a pitched roof, FIG. 2 is a perspective view of a pitched roof,
FIG. 3 is a sectional view of a pitched roof, which is a conventional example of the present invention. 3 ... Formwork, 6 ... Building, 7 ... Eaves, 11 ... Line (wire rope), C ... Concrete.

Claims (1)

[Claims] 1. A method for constructing a pitched roof using concrete for constructing a pitched roof by arranging a pitched roof and providing a formwork around it to construct a pitched roof. A method for constructing a pitched roof made of concrete, in which a line is stretched from the toe to the eaves part to set the standard height of the upper surface of the concrete roof, and the concrete is placed according to this line height.