JP2002242452A - Construction method for opening part in existing masonry construction wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for constructing an opening for a window or an entrance/exit in an existing masonry construction wall. SOLUTION: Multiple through holes 4 are horizontally formed in a line in the existing brick wall 1, two C-shaped channels 6 are laterally disposed on the front/rear of the existing brick wall 1 in such a state as matching their holes to each other, a PC(Prestressed Concrete) steel bar 7 is inserted into the holes of one C-shaped channel 6, the established brick wall 1, and the other C-shaped channel 6 in this order, the PC steel bar 7 is tensed by a hydraulic jack so as to shorten the interval between the C-shaped channels 6 and fixed by nuts 8, and a part of the existing brick wall 1 is pressurized by and supported to the pair of front/rear C-shaped channels 6. The all the bricks 1a positioned in a planned opening part 3 are removed by being cut by a cutter along a cutting line 2 so as to form a large opening 9 for working. Concrete 10 is placed in the appearing end faces of the existing brick wall 1 and an opening 12 having lintel 11 in its upper part is formed in the existing brick wall 1. The pair of front/rear C-shaped channels 6 are removed, and the through hole 4 is filled so that the construction of the opening 12 in the existing brick wall is completed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a new masonry wall, which is formed by assembling wall structural materials such as bricks, concrete blocks, and stones. How to do it.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 2 (A), when an existing masonry wall is an existing brick wall 1, a vertically long work wall is used so that the existing brick wall 1 does not collapse. The small openings 21 are formed at appropriate intervals (for example, about 1 m), and the brick 1a above the small working opening 21 is supported by the H-shaped steel 22 and the shoring 23 to be on the side of the small working opening 21. The brick 1a is removed to form a large working opening 9 as shown in FIG. And further, FIG.
As shown in (C), a reinforcing bar 10A and a formwork (not shown) are arranged around the large opening 9 for work and concrete 10
Is formed, and an opening 12 having a lintel 11 is formed at an upper portion such as a window or an entrance.

[0003]

However, in the above-mentioned conventional construction method, the existing masonry wall has to be separated and removed twice. Because there is a mold steel and a shoring, not only is it difficult to work due to obstruction when forming the lintel, but also the fit is poor,
There were problems such as the above, so it was necessary to solve these problems.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and a first invention is an existing assembly formed by assembling a wall structural material such as a brick or a concrete block. After pressing and supporting a part of the wall structure material of the masonry wall from both sides by a pair of horizontal elongate members disposed on the front and back of the masonry wall, the wall structural material pressed and supported by the horizontal elongate member A new method of installing an opening in an existing masonry wall, wherein an opening is formed in the existing masonry wall by removing a wall structural member located below.

According to a second aspect, in the first aspect,
The pressing force applied to the wall structural member of the horizontal elongate member is provided by a pressing force applying member that is disposed through the existing masonry wall and engages with the pair of horizontal elongate members. This is a new method of installing an opening in an existing masonry wall.

A third invention is characterized in that, in the first or second invention, reinforced concrete is poured into an opening end face of an existing masonry wall formed by removing a wall structural material. This is a new method of installing an opening in an existing masonry wall.

According to a fourth aspect, in the third aspect,
A method of newly forming an opening in an existing masonry wall, wherein a pair of horizontally long members are removed after the reinforced concrete is cast.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIG. Note that, in order to facilitate understanding, in FIG. 1 also, portions having the same functions as the portions described in FIG. 2 are denoted by the same reference numerals. Moreover, the existing masonry wall is described as the existing brick wall 1.

First, as shown in FIG. 1 (A), a plurality of bricks 1 are to be cut and removed later. The through holes 4 are arranged horizontally at appropriate intervals.

Then, two substantially C-shaped channel members 6 each formed of a rigid body and having elongated through-holes 5 arranged in the longitudinal direction at the same pitch as the through-holes 4 are connected to the existing brick wall so that the holes are aligned with each other. 1, a PC steel rod 7 to be placed horizontally on the front and back and functioning as a pressing force applying member is provided with a through-hole 5 of one C-shaped channel material 6, a through-hole 4 of an existing brick wall 1, and another C-shaped channel material 6. Then, the PC steel rod 7 is tensioned to a predetermined stress by using a hydraulic jack (not shown) so that the distance between the pair of C-shaped channel members 6 arranged on the front and back sides is narrowed. Then, a part of the existing brick wall 1, that is, the brick 1a above the opening portion 3 is pressed and supported by the pair of C-shaped channel members 6 arranged on both sides.

After a part of the brick 1a of the existing brick wall 1 is pressed and supported by a predetermined force by a pair of front and back C-shaped channel members 6, as shown in FIG. Expected opening 3 of brick wall 1 by cutter cutting
, All the bricks 1a are removed to form a large working opening 9.

Further, as shown in FIG. 1 (C), after arranging a reinforcing bar 10A and a not-shown formwork on the end face of the existing brick wall 1 where the brick 1a has been removed by cutting with a cutter or the like, the concrete 10 is removed. The brick 12 is cast, and an opening 12 provided with a lintel 11 is formed in the existing brick wall 1.

After the cast concrete 10 has hardened and a predetermined strength has been developed, the pair of front and back C-shaped channel members 6 are removed, the through holes 4 are filled, and the openings 12 for the existing brick wall 1 are formed. New construction is completed.

Since the present invention is not limited to the above embodiment, various modifications can be made without departing from the spirit of the appended claims.

For example, chemical anchors are provided in place of the holes 5, 4, 5 located at both ends, and P, which functions as a pressing force applying member, is provided in the holes 5, 4, 5 located at the center.
The C steel rod 7 is pierced and tightened and fixed by the nut 8, and the brick 1a at the center of the planned opening 3 is pressed and supported so that the brick 1a above the planned opening 3 does not collapse. Can also.

When such a mounting method of the C-shaped channel member 6 is adopted, both ends are compared with a method in which a PC steel rod 7 functioning as a pressing force applying member is pierced into all holes and the nut 8 is tightly fixed. The C-channel material 6 can be quickly attached / detached by the chemical anchor of the portion. Further, since the number of through holes is reduced, the construction period can be shortened.

It is preferable to use a C-shaped channel member 6 which is usually slightly longer than the span of the opening 3 so that the brick 1a above the opening 3 can be reliably pressed and supported.

Between the C-shaped channel member 6 and the brick 1a, a sheet having flexibility and some compressibility such as felt, non-woven fabric, hard rubber, etc. is interposed to form a pair of front and back C-shaped members. The adhesion between the channel material 6 and the bricks 1a may be improved, so that the C-type channel material 6 may enhance the pressing support of the bricks 1a.

The method of newly forming the opening can be applied not only to a brick wall having bricks stacked thereon but also to a wall formed by stacking concrete blocks or stones.

Further, the present invention can be used not only for temporary reinforcement but also for permanent reinforcement.

[0021]

As described above, according to the present invention, after a part of the wall structural member is pressed and supported by the pair of pressing members arranged on the front and back of the existing masonry wall, the wall structural member below the part is removed. This is a method of forming an opening, so that the wall structure material can be removed at one time, so that the working efficiency is good.

Moreover, even if the wall structural material is removed over a wide span, the existing masonry wall does not collapse, and it does not hinder the assembly of reinforcing bars and formwork for forming a lintel over the opening. Since there is nothing to do, the work can be performed more quickly.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Existing brick wall 1a brick 2 Cutting line 3 Expected opening part 4 Through hole 5 Through long hole 6 C-shaped channel material 7 PC steel rod 8 Nut 9 Large working opening 10 Concrete 10A Reinforcing bar 11 Forage 12 Opening 21 Small working opening 22 H-shaped steel 23 Shoring

Claims (4)

[Claims] 1. A part of a masonry wall of a masonry wall is provided by a pair of horizontally long members arranged on the front and back of an existing masonry wall formed by assembling a wall structural material such as a brick or a concrete block. An existing assembly characterized by removing the wall structural material located below the wall structural material pressed and supported by the horizontal elongate member after pressing and supporting from both surfaces to form an opening in the existing masonry wall. A new method of opening a masonry wall 2. A pressing force applied to the wall structural member of the horizontally long member by a pressing force applying member disposed through the existing masonry wall and engaged with the pair of horizontally long members. 2. The method according to claim 1, wherein the opening is formed in an existing masonry wall. 3. An opening in an existing masonry wall according to claim 1 or 2, wherein reinforced concrete is cast into an opening end surface of the existing masonry wall formed by removing the wall structural material. How to establish a new department. 4. The method according to claim 3, wherein the pair of elongated members is removed after the reinforced concrete is cast.