JPS6198842A - Construction of temporary opening of building wall and embedding closing method thereof - 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] [Technical Field of the Invention] The present invention relates to a method for constructing a temporary opening in a wall during the construction of a reinforced concrete building for carrying in equipment and workers, and a method for filling the temporary opening. .

[Technical Background of the Invention] In conventional reinforced concrete building construction,
In cases where large equipment to be installed cannot be brought in through the normal passageway after the building is completed, or when it is necessary to secure a work area for plumbing or electrical work, install a A method is used in which a temporary opening of a size necessary for carrying in the equipment or construction work is provided, and this temporary opening is filled and closed when the carrying-in or construction work is completed.

A conventional method of constructing a temporary opening will be explained with reference to FIG.

Vertical reinforcing bars 2 and horizontal reinforcing bars 3 and reinforcing bars (not shown) perpendicular to the vertical reinforcing bars 2 and horizontal reinforcing bars 3 are installed at locations that will become the walls surrounding the temporary opening 1, and a formwork (not shown) is temporarily constructed. For installation, pour concrete 4 around the four circumferences of the opening 1,
Wait for the end of the curing period and then remove the formwork.

The reinforcing bars 2 and 3 in the concrete 4 placed around the four circumferences of the temporary opening 1 have their tips extended into the temporary opening 1 by a predetermined length and exposed. This exposed part will be used to connect the reinforcing bars that will be assembled inside the temporary opening 1 when the temporary opening 1 is later filled in, but the reinforcing bars 2 of the lower wall and side wall will
, 3 are bent at the bent portions 2a and 3a, respectively, as shown in the figure, so that they do not get in the way when carrying in or passing by. Also, during the concrete 4 curing of the lower wall,
The bent part 2a of the reinforcing bar is made of wood or the like to ensure the safety of the working tread.

Next, to explain the method of filling and closing the temporary opening 1,
The inner end is exposed and faces vertically and horizontally λ
Reinforcement bars are welded between each end of the reinforcing bars 2 and the horizontal reinforcing bars 3, and the reinforcing bars are arranged in a cross-shaped pattern within the temporary opening 1, and the formwork is attached with the reinforcing bars in between. By pouring concrete into the concrete and removing the formwork after the curing period,
The filling and closing of the temporary opening 1 is completed.

[Problems with background technology]

The conventional method of constructing a trench for a temporary opening in a building wall and its filling method is as described above, but the exposed reinforcing steel inside the temporary opening becomes a hindrance to equipment transport and traffic, so the tip of the reinforcing bar is bent. However, this was not desirable from a safety standpoint, as the workers' clothes could get caught on the bent reinforcing bars, or equipment brought in could come into contact with them and be damaged.

In addition, the temporary opening must be made large in consideration of the extra space occupied by the bent reinforcing bars, and when the temporary opening is filled in, new reinforcing bars must be installed around the four sides of the temporary opening. In order to connect the reinforcing bars, it was necessary to straighten the bent reinforcing bars, which required a lot of man-hours.

As mentioned above, implementing the conventional method of constructing a temporary opening and its filling method not only requires a large number of man-hours, construction costs, and a long construction period, but also poses problems in terms of work safety.

[Purpose of the invention]

This invention was made in order to solve the above-mentioned problems in the conventional method of constructing a temporary opening and its filling method.
By eliminating any reinforcing bars exposed inside the temporary opening, the temporary opening can be constructed to the minimum necessary size, reducing man-hour costs by eliminating bending of the reinforcing bars, and reducing transmission due to contact with exposed bent parts of the reinforcing bars. In addition to providing a method for constructing a low-volume opening suitable for safe work without causing damage to input equipment or injury to workers, the present invention aims to reduce man-hour costs by simplifying the installation of reinforcing bars within the low-volume opening. The purpose of this invention is to provide a method for filling a low-volume mouth part that can shorten the construction period.

[Summary of the invention]

The method for constructing a low-volume opening of a building wall according to the present invention is as follows: Instead of regular reinforcing bars, a sleeve with an internal conical thread is screwed into the threaded part, and a reinforcing bar with a threaded end is installed with the opening part facing each other, and one end surface of the sleeve with an internal conical thread is reinforced with a threaded end. Arranged so that it is in the same plane as the inner surface of the circumference of the opening, one side is in contact with the one end surface of the inner conical threaded sleeve, and the formwork for the four circumferences of the low volume opening is passed through the pre-drilled bolt holes and tightened. The above object is achieved by screwing a bolt into a sleeve with an inner conical thread, and pouring concrete between this formwork and a formwork for a vertical wall, which is set separately. The method of embedding is a sleeve-type threaded joint with an inner conical thread, a threaded reinforcing bar that is screwed into one end of the threaded joint, and a threaded reinforcing bar that is screwed into the other end of the threaded joint to adjust the depth. Prepare the required number of connecting reinforcing bars in advance, and screw both ends of each of these connecting reinforcing bars into the threaded holes of the sleeves with internal conical threads, which are buried facing each other with only one end surface exposed in the concrete. The above objective is achieved by using reinforcing bars within the section.

[Embodiments of the invention]

An embodiment of the method for constructing a low volume mouth according to the present invention will be described with reference to FIG.

Reinforcing bars are arranged perpendicularly in the upper wall, lower wall, and both side walls that form the four circumferences of the low-volume mouth part 11, but in the lower dark part of the upper wall, a plurality of reinforcing bars 12 with threaded ends are placed at intervals from each other. A vertical reinforcing bar is formed by opening and vertically disposing the low-volume openings 11 in between and facing each other, and on both side walls, a plurality of reinforcing bars 13 with threaded ends are placed at intervals from each other in the horizontal direction. The horizontal reinforcing bars are arranged so as to face each other with the low volume openings 11 in between, and to be shifted horizontally by the diameter of the reinforcing bars 12 with threaded ends. The reinforcing bars 12.13 with threaded ends are combined with regular reinforcing bars (not shown) that are orthogonal to the reinforcing bars (not shown). An inner conical threaded sleeve 14 is attached to the threaded portion of the threaded reinforcing bar 12 , 13 so that one end surface thereof is located on the same plane as the circumferential inner surface of the low volume opening 11 . The other end is screwed in and fixed by welding to the reinforcing bars 12 and 13 with threaded ends.The formworks 15 and 16 for the four circumferences of the low volume mouth part 11 each have reinforcement arranged on the four peripheral walls of the plurality of low volume mouth parts 11. Pre-drill a through hole through which the tightening bolt 17 will be inserted at a position opposite to the threaded reinforcing bar 12. After completing the arrangement of the threaded reinforcing bars 12 and 13 and the normal reinforcing bars (not shown) that are perpendicular to these, one side of the formwork 15° 16 is placed against the flat end face of the inner conical threaded sleeve 14 and tightened with the tightening bolt 17. In addition to setting the four circumferential frames, another formwork (not shown) for the vertical surface of the four circumferential walls of the low volume mouth part 11 is set as formwork 1.
5. Concrete 18 is placed between the formwork 15.16 and the other formwork. After the curing period of the concrete 18 has elapsed, the tightening bolts 17 are removed, the formwork 15.16 and the other formwork mentioned above are removed, and the reinforced concrete IJ is removed.
- Complete the construction of the low-volume opening 11 of the building wall. If necessary, the exposed screw hole ζ of the inner conical threaded sleeve 14 is fitted with a removable dust stopper to prevent dust from entering.

Once the low-volume port 11 is completed by the method described above, the work required to bring equipment and equipment through the low-volume port 11 will begin, and once the related work is completed, the low-volume port 11 will be unnecessary. Therefore, the burying work will be carried out.

An example of the method for filling and closing a low-volume oral cavity according to the present invention, IAflI, will be explained with reference to FIG.

First, a threaded joint 21 is formed into a sleeve with an inner conical thread and has an internal thread having the same diameter and pitch as the inner conical threaded sleeve 14 in FIG. with reinforcing bars 22,
Connecting reinforcing bars 20 each consisting of a threaded reinforcing bar 23 screwed into the other end of a threaded joint 21 at one end so as to adjust the threading depth are prepared in advance, equal to one of the total number of inner conical threaded sleeves 14 shown in FIG. The lengths of the threaded reinforcing bars 22, 23 and the threaded joint 21 can be adjusted by adjusting the screwing depth of the threaded reinforcing bars 23 into the threaded joint 21, so that both ends of the connecting reinforcing bars 20 can be adjusted to the vertically opposing sides in FIG. It can be supported by a threaded internal conical threaded sleeve 14.14 either on the conical threaded sleeve 14.14 or on a horizontally opposing internal conical threaded sleeve 14.14, and the overall length of the connecting reinforcing bar 20 is reduced. It is determined so that it can be made slightly shorter than the narrower dimension of the distance between the peripheral walls of the mouth portion 11.

In order to embed and close the low volume mouth part 11, reinforcing bars are arranged in the shape of parallel crosses inside the low volume mouth part 11, and the connecting reinforcing bars 20 are used as the reinforcing bars. This assembly method will be explained using vertical reinforcing bars as an example.

By adjusting the screwing depth of the threaded reinforcing bar 23 into the threaded joint 21, as shown in the connecting reinforcing bar 20 shown on the left side of FIG. The length is such that it can be vertically inserted between sleeves 14 and 14 with internal conical threads buried vertically opposite to each other in the lower wall.

Using a pipe wrench or the like, the connecting reinforcing bar 20 is firmly screwed into the inner conical threaded sleeve 14 at the lower end of the threaded reinforcing bar 22. Next, threaded reinforcing bar 2
3 into the threaded joint 21, unscrew it, and screw the upper end into the inner conical threaded sleeve 14 above to complete the assembly as a vertical reinforcing bar. Connecting reinforcing bar 2 used as horizontal reinforcing bar
0 also has an inner conical threaded sleeve 1 embedded in both side walls of the low volume opening 11 with both ends thereof as in the case of the vertical reinforcing bar.
4 (Fig. 1).

After arranging all the connecting reinforcing bars 20 prepared as vertical reinforcing bars and horizontal reinforcing bars in the low-volume opening 11 as described above, a frame is placed on both sides of the low-volume opening 11 with this reinforcement in between. concrete is poured between the formworks, and after the curing period of the concrete has elapsed, the formworks are removed, thereby completing the filling work of the low-volume opening 11 provided in the reinforced concrete building wall.

〔Effect of the invention〕

The method for constructing a low-volume opening of a building wall according to the present invention uses a plurality of reinforcing bars with threaded ends, each of which is secured by screwing one end of a sleeve with an inner conical thread to the threaded portion, as reinforcing bars for the four peripheral walls of the low-volume opening. Since the sleeves with internal conical threads were arranged perpendicularly to the circumferential inner surface of the low volume mouth part and so that the other end surface of each sleeve was located on the same plane as the circumferential inner surface of the low volume mouth part, there were no reinforcing bars inside the low volume mouth part. There is no protrusion at all, so the size of the low volume opening can be minimized, and there is no need to bend or stretch the protruding reinforcing bars, which has the effect of reducing man-hour costs.
This invention has the effect of allowing work to be carried out safely without causing damage to the equipment brought in due to contact with the bent part of the reinforcing bars and injury to workers, and the method of burying the low-volume opening of the building wall according to the present invention The closing method is to use a sleeve-shaped threaded joint with an inner conical thread, one end of which is screwed into one end of the threaded reinforcing bar, and one end of which is fixed to the other end of the threaded joint. Screw-in Depth Prepare in advance the required number of connecting reinforcing bars consisting of threaded reinforcing bars that can be freely screwed into the secondary cylinder, and screw both ends of each of these connecting reinforcing bars into the inner conical threaded sleeve embedded in the four peripheral walls of the low volume opening. By placing the reinforcement in the mouth, we arranged a low amount of reinforcement inside the mouth.
Reinforcement arrangement work is simple and easy, and this has the effect of reducing man-hour costs and shortening the construction period for low-volume mouth filling.

[Brief explanation of drawings]

Figures 1 and 2 are illustrations of the method for constructing and burying trenches in the low-volume opening of a building wall according to the present invention. It is an explanatory diagram of the construction method. 11...Low volume opening, 12.13...Reinforced bar with threaded end, 14...Sleeve with inner conical thread, 15.16.
... Formwork, 17... Tightening bolt, 18... Concrete, 20... Connecting reinforcing bar, 21... Threaded joint, 22
．． 23...Threaded reinforcing bar (7317) Agent Patent attorney Sosuke Norichika (and one other person) No. 12 Reinforcing bar with threaded end 12 No. 27 No. 3 Fig.

Claims (2)

[Claims] (1) Install multiple reinforcing bars with threaded ends at intervals in the upper wall, lower wall, and both side walls, which are the four circumferences of the temporary opening provided in the reinforced concrete building wall, and use the threaded ends to open the temporary opening. The reinforcements are placed a predetermined distance outward from the periphery, facing vertically on the lower wall of the upper wall, and facing horizontally on both side walls, and one end of the sleeve with an inner peripheral female thread is placed around the temporary opening. A plurality of reinforcing bars are screwed into and fixed to the threaded portions of the reinforcing bars with threaded ends so as to be located on the same plane as the inner surface, and a plurality of reinforcing bars are provided in each of the upper wall, lower wall, and both side walls perpendicular to the reinforcing bars with threaded ends. are assembled, and each of the formwork for the periphery of the temporary opening, which is a plurality of plates with bolt holes drilled at positions perpendicularly opposite to each of the reinforcing bars with threaded ends disposed within each of the walls, is tightened inside the inside with tightening bolts. A four-peripheral frame of the temporary opening is set by tightening the circumferential female threaded sleeve to the exposed end surface, and the inner circumferential female threaded sleeve is interposed between the fixed reinforcing bar with the threaded end and the reinforcing bar perpendicular to this reinforcing bar. Then, formwork for the vertical wall is set around the four circumferences of the temporary opening, concrete is poured in the area surrounded by the formwork, and after the curing period of this concrete has elapsed, the tightening bolts and all of the formwork are A method of constructing a temporary opening in a building wall by removing. (2) A plurality of reinforcing bars with threaded ends are fixed by screwing sleeves with internal internal threads into the threaded parts of the upper wall, lower wall, and both side walls forming the four peripheral walls of the temporary opening in the reinforced concrete building wall. This reinforcing bar is combined with a plurality of reinforcing bars perpendicular to the reinforcing bar, the threaded reinforcing bars are arranged to face each other vertically on the upper and lower walls, and horizontally on both side walls, and one part of the sleeve with internal female threads is arranged. A building wall constructed in advance by arranging the end face to be located on the same plane as the circumferential inner surface of the temporary opening, using the reinforcing steel set as an inner frame, and pouring concrete to form the four circumferential walls. In the method of filling and closing temporary openings, a sleeve-shaped threaded joint with an internal female thread is used, one end is screwed into one end of this threaded joint, and a threaded reinforcing bar is fixed, and one end is screwed into the other end of the threaded joint so that the depth can be adjusted freely. A required number of connecting reinforcing bars consisting of threaded reinforcing bars to be screwed are prepared in advance, and the connecting reinforcing bars are installed at the exposed ends of the internal female threaded sleeves buried oppositely in the upper wall and the lower wall and in the both side walls. Both ends of each are screwed in to assemble reinforcing bars in the temporary opening, a formwork is set with these reinforcing bars in between, concrete is poured between the forms, and after the curing period of this concrete has elapsed, the above-mentioned form is A method for filling and closing temporary openings in building walls, which is characterized by removing the frame.