JP2005220619A - Construction method for enhancing earthquake resistance of masonry structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction method for enhancing earthquake resistance of a masonry structure, which prevents a wall of the masonry structure, constituted by heaping up bricks, blocks, stones, etc., from easily collapsing due to earthquakes etc., by using an available inexpensive material and a technically simple method. <P>SOLUTION: In this construction method for enhancing the earthquake resistance of the masonry structure, a pair of netlike bodies, which is formed of an olefin resin band, is arranged on both the front and back sides of the wall of the masonry structure which is constituted by heaping up the bricks, the blocks, the stones, etc., and coupled together by means of a plurality of coupling members which pass through the wall. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention improves the earthquake resistance of a masonry structure wall composed mainly of bricks, blocks, stones, etc., and prevents the masonry structure from collapsing due to an earthquake or the like. It relates to the improvement of construction method.

  For example, in the Middle East, Central and South America, and the like, many houses are used that use simple masonry walls constructed by stacking bricks and stones with mortar as a joint material. In a house with such an architectural structure, a wall easily collapses even in a relatively weak earthquake, and the entire house often collapses, so a resident often dies under the house. Some surveys show that 1.4 million people were killed in the Asia-Pacific region during the 90 years of 1900-1990 due to earthquakes, many of which are thought to be due to the collapse of these houses.

In order to prevent the wall from collapsing, a method of increasing the seismic resistance of the wall itself by fixing a reinforcing bar, a wire mesh, or the like along the inner wall or along the wall surface can be considered.
However, there is a problem that increasing the earthquake resistance by using a reinforcing bar, a wire mesh or the like increases the construction cost and increases the construction, and is difficult to spread widely.

  In view of the above problems, the present invention can prevent a wall of a masonry structure constructed by stacking bricks, blocks, stones, and the like from easily collapsing due to an earthquake or the like, and the construction cost is also relatively low. The objective is to provide a method for improving the earthquake resistance of masonry construction that is easy to be widely adopted by all.

  In order to solve the above problems, the present invention arranges a pair of nets formed of olefin-based resin bands on both front and back surfaces of a masonry structure wall constructed by stacking bricks, blocks, stones, and the like, A construction method for improving the earthquake resistance of masonry is provided, wherein the pair of nets are connected by a plurality of connecting members penetrating walls.

According to such a masonry construction method for improving seismic resistance, a pair of nets formed of olefin resin bands are connected to each other by a plurality of connecting members penetrating the walls, thereby forming the walls. The bricks, stones, etc. to be encased by the net-like body. Therefore, even when the wall is greatly shaken by the earthquake, the bricks and the like are hardly completely separated, and the complete collapse of the wall is prevented. Thus, if the wall can be prevented from being completely collapsed, the house can be prevented from collapsing, and the damage caused by the earthquake can be reduced.
In addition, compared to the case of using reinforcing bars, wire mesh, etc., it is easy to process and the material cost is low. .

  Hereinafter, an embodiment of a method for preventing collapse of an existing wall according to the present invention will be described in detail with reference to FIGS.

  FIG. 1 is a front view showing an existing wall as a construction target in one embodiment of the present invention. 2 is a front view showing a state in which a net-like body is attached to the existing wall, and FIG. 3 is a partially enlarged view of FIG.

  As shown in FIG. 1, an existing wall 1 that is a construction target is a wall having a masonry structure in which bricks 3 are stacked using a mortar 2 as a binder, for example. The wall 1 may be not only an outer wall facing the outside of the house, but also an inner wall that divides a room and a wall other than a house.

  In this embodiment, as shown in FIGS. 2 and 3, first, the surface and the back surface of the existing wall 1 are covered with a net 4 formed of an olefin resin band, and then the surface and the back surface of the existing wall 1 are covered. By connecting the pair of nets 4 arranged by connecting members 5 provided so as to penetrate the walls at each place of the existing wall 1, the wall collapse is prevented as much as possible. It is.

  As the olefin resin constituting the olefin resin band, various kinds of polyethylene, polypropylene, and the like can be used. In addition, the band is not particularly limited as long as it is band-shaped, but from the viewpoint of being easy to obtain because it can effectively cover the wall surface to prevent the jumping out of bricks and the like and is widely spread. A band for use can be suitably used. In particular, a polypropylene (PP) band is more preferable from the viewpoint of high tensile strength and low cost.

As the reticulate body 4, a reticulated body can be used in which the olefin resin bands are arranged so as to be orthogonal. The orthogonal bands are preferably configured so that the shape of the net can be maintained by alternately knitting the upper and lower bands or by welding with heat or the like.
Moreover, it is preferable that the size of the mesh of the mesh-like body 4 is such that bricks, stones, and the like constituting the wall do not pass through.

  When installing the mesh body 4 on the wall 1, as shown in FIG. 2, it is preferable to fix the olefin-based resin band in a direction inclined at about 45 degrees. When fixed in such a direction, even when a lateral stress is applied to the wall due to an earthquake or the like, the olefin-based resin band inclined to either the left or right side relaxes the stress, and the wall 1 collapses. This can be prevented more effectively.

  It is also possible to fix the mesh so that the olefin resin band is in the vertical direction and the horizontal direction. When such a fixing method is employed, there is an effect that it is easy to process the mesh 4 with an olefin resin band.

  At the upper end and the lower end of the wall 1, it is preferable to fix the end of the mesh body 4 to a jig (not shown). As the jig, for example, a rod-shaped member that can be easily fixed by winding the olefin-based resin band can be suitably used.

  Further, the connecting member 5 is not particularly limited as long as it can connect the mesh bodies 4 to each other, and any member can be used.

The installation location and the number of installation of the connecting member 5 are not particularly limited, and the installation is performed within a range in which the collapsing prevention effect can be obtained in consideration of the strength of the masonry wall to be constructed and the size of the block used. That's fine.
When the wall to be constructed has the structure as described above, a through hole (not shown) is provided in the portion of the mortar 2, the connecting member 5 is inserted into the through hole, and one end and the other end of the connecting member 5 are provided. May be fixed to the mesh body 4 respectively.

  Further, the method for fixing the connecting member 5 and the mesh body 4 is not particularly limited. For example, a method of fastening one end of the connecting member 5 to a portion where the olefin resin band of the mesh body 4 intersects is preferably adopted. Can do.

  When the end of the wall is interrupted or there is an opening in the wall, the mesh body 4 is bent along the edge of the wall and directly connected to the mesh body 4 disposed on the opposite surface side. You may do it.

  Furthermore, in order to keep the aesthetic appearance of the wall, it is possible to coat the mesh body 4 by applying mortar or the like (not shown) from above the mesh body 4 as necessary.

  The wall of the masonry structure that has been prevented from collapsing by the above method is that the brick 3 is surrounded from both the front and back surfaces by the pair of nets 4 connected by the connecting member 5. It is possible to obtain a structure that does not easily fall apart and hardly collapses. Further, by preventing the wall from collapsing, the earthquake resistance of the house, which has conventionally been highly likely to collapse, is improved, and the number of casualties due to the earthquake can be greatly reduced.

The construction method for improving the earthquake resistance of masonry construction according to the present invention is a great feature in that the construction to an existing structure can be easily performed, but the construction object is not limited to the existing structure.
That is, the construction method of the present invention can also be applied when newly constructing a structure, and in that case, the construction becomes easier.

The front view which showed an example of the wall used as construction object. The front view which showed the state which arranged the mesh body on the wall. The elements on larger scale of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wall used as construction object 2 Mortar 3 Brick 4 Net body 5 Connection member

Claims (1)

  A pair of nets formed of olefin resin bands are arranged on both front and back surfaces of a masonry structure wall constructed by stacking bricks, blocks, stones, etc., and a plurality of connecting members penetrating the wall A method for improving the earthquake resistance of masonry, characterized by connecting a pair of nets.