JP6120292B2 - Wall structure, vent wall, and construction method thereof - Google Patents

Description

  The present invention enables construction management in which a wall body having a desired thickness is constructed by applying mortar easily in an appropriate lath mesh shape, and the constructed wall body is integrated with the lath mesh and has a strength. The present invention relates to a wall structure having a high and stable wall magnification, a vent wall, and a construction method thereof.

Conventionally, the outer wall of a mortar has been finished after a waterproof sheet is attached to a structural member, a metal lath is attached with a fixture such as staples, a lightweight mortar is applied, and after drying and curing.
However, with such mortar outer walls, cracks occur over time, the appearance is impaired, and metal laths are rusted due to water leakage from the cracks, etc. there were.

Therefore, the present inventors can prevent the occurrence of cracks in the mortar and can prevent problems such as peeling of the mortar layer over a long period of time, and further, wooden structures, reinforced concrete structures, As a construction method that can be widely applied to buildings such as a precast concrete structure, a block structure, a brick structure, an ALC structure, and the like to ensure the reliability of construction, the construction method of the outer wall shown in Patent Document 1 has been proposed.
In the construction method of the outer wall described in Patent Document 1, after a waterproof sheet such as asphalt felt is stretched on the base member, the metal lath rust-proof treated product is fastened with a stable, and then a lightweight cement mortar is applied, After the net material is pressed and embedded on the surface, it is finished. As a result, the durability of the mortar layer was improved, cracking and peeling of the mortar layer were prevented, and the protection performance of the mortar could be enhanced at the same time.

Japanese Patent No. 3023836

  However, for example, in the construction method of the outer wall as described in Patent Document 1 described above, a metal lath and a staple having a general configuration such as a wire lath using a zinc iron wire or a rib lath using a galvanized steel plate are used, and light weight is provided from the outside. It was extremely difficult to apply a mortar to construct an appropriate and uniform wall. In other words, there has never been a method for easily managing mortar construction.

  Therefore, the present invention can solve the above-mentioned problems, and can easily apply mortar with an appropriate lath net shape to construct a wall body having a desired thickness. An object of the present invention is to propose a wall surface structure, a ventilation wall surface body, and a construction method thereof, which are integrated with a lath net and have high strength and a stable wall magnification.

The present invention has been proposed in view of the above. A mesh lath made of stainless steel welded wire mesh is fixed to a structural material or substructural material, and a mortar is constructed so that the mesh lath is embedded. The mesh lath is a method for constructing a wall surface structure, in which a plurality of longitudinal force bones and a plurality of lateral force bones are combined in a lattice shape, and two or more adjacent lateral force bones are combined. A trapezoidal peak is formed and deformed so that one lateral force bone forms a valley . The flat peak, the upward slope and the downward slope are repeated. a continuous shape, structural member or longitudinal forces bone mesh lath after the deformation toward the surface side from the secondary structural material, is arranged such that the order of the lateral force bone Rutotomoni, the downward slope and up slope staple valleys which is a boundary between the surface of stainless And a second step of applying the mortar from the side of the lateral force bone of the mesh lath to the state where there is no exposure of all the strength bones constituting the mesh lath. It is related with the construction method of the wall surface structure characterized by becoming.

  Further, the present invention is characterized in that in the construction method of the wall surface structure, the mesh lath combines a plurality of longitudinal force bones and a plurality of lateral force bones in a lattice shape so that a horizontally long opening is formed. We also propose a method for constructing wall structures.

In the construction method of the wall surface structure according to the present invention, the mesh lath may be formed by combining a plurality of longitudinal force bones and a plurality of lateral force bones in a lattice shape and integrating them. A wall surface structure construction method is also proposed.
Therefore, when this mesh lath forming method is incorporated into the construction method of the wall surface structure, first, a plurality of longitudinal force bones and a plurality of lateral force bones are combined in a lattice pattern and integrated by spot welding or the like. The second step, the second step, the second step, the second step, the second step, the second step, the second step, the second step, and the second step. Become.

  Further, the present invention provides a method for constructing a wall structure, wherein a laminated waterproof sheet having a configuration in which a fiber net is bonded to a transparent plastic film is used as a mesh lath waterproof paper. A construction method is also proposed.

  Furthermore, the present invention provides a pre-process for securing a ventilation layer by attaching a body rim or a fixing bracket for ventilation to a structural material or a sub-structural material, the first step, the second step, and the mortar. The present invention also proposes a method for constructing an air-permeable wall body characterized by including a post-process in which a net is laid on the surface layer and a finishing mortar is applied.

  The present invention also proposes a method for constructing a ventilation wall body, wherein the net is a glass fiber net containing zirconia.

  Furthermore, this invention also proposes the wall surface structure characterized by being constructed by the construction method of the wall surface structure.

  The present invention also proposes a wall surface structure using a mesh lath to which a reinforcing longitudinal bone is added in the wall surface structure.

  Furthermore, the present invention also proposes a vent wall surface body that is constructed by the construction method of the vent wall surface body.

The construction method of the wall surface structure of the present invention uses a mesh lath made of stainless steel wire mesh and stainless steel staples, and a plurality of longitudinal force bones arranged on the inside and a plurality of lateral force bones arranged on the outside Welded wire meshes that are combined in a lattice shape are deformed by adjusting the thickness so that two or more adjacent lateral force bones form the top of a trapezoidal mountain and one lateral force bone forms a valley. With a suitable lath net shape, it is only necessary to apply a mortar trowel from the surface side ( outside ) to the outside of the lateral force bone (top), so that the trowel can be applied smoothly. Moreover, since uniform coating can be performed, quality control is possible.
Further, in the deformation processing of the mesh lath, although each longitudinal force bone is deformed, each lateral force bone is not deformed, so that a stress against a lateral displacement or the like is high.
And, by this construction method, the applied mortar is integrated with the mesh lath, and the strength is high, the rust prevention effect is also high, and the durable bearing wall is easily constructed on the outside of the structural material or substructure material. It will be a thing.

  In addition, when the mesh lath combines a plurality of longitudinal force bones and a plurality of lateral force bones in a lattice shape so that a horizontally long opening is formed, the number of lateral force bones that resist lateral displacement, etc. Since the mesh lath has a large amount, a more stable wall magnification can be obtained.

  In addition, when the mesh lath is formed by combining a plurality of longitudinal force bones and a plurality of lateral force bones in a lattice shape and integrating them, the first step and the second step are performed. Prior to this, a step of combining a plurality of longitudinal force bones and a plurality of lateral force bones in a lattice shape and integrating them by spot welding or the like, adjusting the thickness, and performing deformation processing may be performed. In addition, a stainless steel mesh lath may be separately prepared and stored, and it may be used as needed.

  In addition, when using a laminated waterproof sheet with a structure in which a fiber net is bonded to a transparent plastic film as a mesh lath waterproof paper, the base barrel edge can be seen through, so that it can be placed at an appropriate position and stapled. Can be easily fixed, and it is strong against impact force, and the mortar is difficult to break.

  Furthermore, in the construction method of the vent wall surface body of the present invention, a pre-process for securing a vent layer by attaching a body edge or a fixing bracket for ventilation to the structural material or the sub-structural material is performed, and the first step and the second step are performed. After performing the above step, a post-step is further performed in which the net is covered with the surface layer of the mortar and the finishing mortar is applied. As described above, a wall surface excellent in resistance to cracking and strength characteristics can be easily and uniformly applied.

  Further, when the net is a glass fiber net containing zirconia, the alkali resistance is high and the quality is continuously maintained.

  Furthermore, as described above, the wall surface structure of the present invention is excellent in resistance to cracking and strength properties, has a stable quality, and has a mesh lath made of a stainless steel wire mesh and stainless steel staples. Since it is used, it becomes a load-bearing wall with high rust prevention effect and excellent durability capable of obtaining a stable wall magnification.

  In addition, when using a mesh lath with a longitudinal force bone for reinforcement, it is possible to increase the fixing points of the staples, so that resistance to cracking and without reducing the stable construction performance related to the mortar coating described above. It is possible to make the bearing wall superior in durability.

  Furthermore, the vent wall surface of the present invention has the same effect as that of Patent Document 1, that is, improves the durability of the mortar layer, prevents cracking and peeling of the mortar layer, and at the same time enhances the protection performance of the mortar. In addition to the effect that can be obtained, the above-described rust-preventing effect is high, and there is also an effect that the bearing wall is excellent in durability capable of obtaining a stable wall magnification.

(A) Plan view showing mesh lath (test body No. 1) used in Example, (b) Enlarged perspective view of X portion, (c) Front view and side view showing staple shape used in Example FIG. (A) The top view which shows the mesh lath (test body No. 2) used in the Example, (b) The expansion perspective view in Y part, (c) The expansion perspective view in Z part. (A) Elevated body elevation view of specimen No. 1 used in the examples, (b) A horizontal sectional view thereof. (A) Lath arrangement | positioning elevation of test body No. 1 used in the Example, (b) It is the horizontal sectional view. (A) Elevated body elevation view of test body No. 2 used in Examples, (b) A horizontal sectional view thereof. (A) Lath arrangement | positioning elevation of test body No. 2 used in the Example, (b) It is the horizontal sectional view. It is a front view which shows the no-load-type in-plane shear test method. It is a graph (load-shear deformation angle curve) which shows the test result of the test body No. 1 of an Example. It is a graph (load-shear deformation angle curve) which shows the test result of test body No. 2 of an Example. It is a graph which shows the envelope of test body No. 1 and test body No. 2 of an Example. It is a graph which shows the complete elastic-plastic model in No. 1 of an Example, and test body No. 2. FIG. (A) Side sectional view showing a connecting portion between mesh laths having a flat edge shape, (b) Side sectional view showing a connecting portion between mesh laths having an inclined edge shape, (c) ) Cross-sectional view showing the end portion of the mesh lath with a flat edge shape, (d) Cross-sectional view showing the end portion of the mesh lath with the inclined edge shape, (e) Implementation It is a side view of the mesh lath used for the example.

  The method for constructing a wall structure according to the present invention includes a mesh lath made of stainless steel welded wire mesh with waterproof paper as a lath net used for construction of the outer wall of a mortar, and two or more adjacent lateral force bones at the top of the mountain. The construction is such that construction management can be easily performed using a mesh lath of an appropriate shape that is formed and deformed by adjusting the thickness so that one lateral force bone forms a valley. In other words, by applying up to the peak of the mesh lath, the coating thickness can be made constant, and quality control by on-site construction becomes possible.

  As the mesh lath, various types of wire nets have already been put on the market, and roughly classified into four types of flat lath, hump lath, corrugated lath and rib lath. For example, even those classified as flat laths, expanded metal formed by cutting various metal plate materials, woven wire mesh knitted from wire-like metal, wire lath such as crimp wire mesh, punching metal, etc. A wide variety of products have been developed and used for a wide variety of applications suitable for each.

The welded wire mesh is rather widely known as a building material, and is a wire mesh in which longitudinal and lateral force bones are arranged at right angles and the intersections are electrically resistance welded. The load weight is averaged in a balanced manner at each weld point. Therefore, it has a characteristic that it can withstand a large load weight even with a relatively thin rib, and is used for, for example, large-scale civil engineering work.
Other uses of the welded wire mesh mainly include reinforcement for preventing cracks in concrete structures and water channels. Has been used for display, baskets, gardening supplies, fences, etc., with painting and vinyl coating treatment. The wire diameter of each bone is about 2.6 to 8 mm, and the mesh size is about 50 to 250 mm. Are widely known.

It should be noted that the metal wire that can be said to be a metal lath used for the plastering coating base is clearly different in size from the above-mentioned welding wire mesh for building materials, and is, for example, a 2 mm wire frame made of zinc iron wire. A metal lath with a structure that is assembled by vertically and horizontally, a metal lath with a structure in which this metal lath is deformed into a wave shape, or a metal lath with a waterproof sheet sandwiched between the longitudinal strength bone and the lateral strength bone , Etc. are also known.
The metal laths which are these welded wire meshes can be appropriately used for various uses as with the other metal laths described above.

Unlike general products (metal laths) such as these, welded wire mesh as building materials, or welded wire mesh made of zinc iron wire, the mesh lath used in the present invention is adjacent to a stainless steel welded wire mesh with a waterproof sheet. A structure in which two or more lateral force bones are deformed so as to form a top portion of a trapezoidal mountain and one lateral force bone forms a valley portion (in a square wave shape) is used. Note that the number of lateral force bones forming the top of the trapezoidal mountain may be three or more, but two is most preferable in consideration of cost and the like.
The mesh lath used in the present invention is made of stainless steel, and therefore has high rust resistance and maintains high strength and shape characteristics.
In addition, since two or more adjacent lateral force bones form the top of the trapezoidal mountain during deformation, the trowel coating from the outside becomes smooth. Moreover, since the stainless steel staples are fastened to the lateral force bones that form the valleys, the staples can be hit at appropriate positions, and a stable trapezoidal peak is formed on the outside of the structural material or substructure material. It becomes. Therefore, mortar can be applied to an appropriate thickness, construction management can be easily performed, and thickness quality control can be performed. The staple used at that time may be arbitrarily set so that the pull-out strength of the staple is within the range where the mesh lath and the mortar are integrated.
Furthermore, when the wire diameter of the vertical and horizontal ribs is 2 mm or more, the weight of the entire mesh lath becomes too large, and the burden on the structure or substructure to which this mesh lath is attached, or the burden on the staple described later increases. As a result of examination with a diameter of less than 2 mm, it was preferable to use each strength bone of SUS304 having a diameter of 1.2 to 1.8 mm, and in the examples described later, a diameter of 1.6 mm was more preferable.

In short, assuming a case where deformation is performed so that the peak portion repeats in the vertical direction, the lateral force bone forming the peak portion becomes a target in the mortar coating, and the lateral force bone forming the valley portion becomes the staple attachment position. Therefore, if the crest is deformed so as to form a zigzag with a single lateral force bone, the density of the lateral force bone is too high, and the staple driving position (valley) Too much (too dense). For this reason, if there is an interval between the lateral force bones, the mountain becomes too soft and it is difficult to coat the mortar with the iron, and the mortar is not sufficiently integrated with the mortar. If staples having a strong fixing force are used in a state where they are not sufficiently integrated, the staples may not come off and the mesh lath may come off from the mortar.
On the other hand, in the mesh lath used in the present invention, since two or more lateral force bones form a trapezoidal peak, it is easy to follow the iron when applying the mortar iron, and the iron application becomes smooth, and construction management is easy. Is possible. In addition, it can be integrated with the mortar, and the lateral force bones constituting one trough can be easily disposed at the proper span position.

It should be noted that the plurality of longitudinal force bones and the plurality of lateral force bones do not necessarily have to be combined so that a rectangular (square) opening (mesh) is formed. It is desirable to combine so that the opening part (mesh) of this may be formed. This is because the lateral force bone has tensile / compressive strength that resists displacement in the lateral direction, and the bearing wall is preferably resistant to lateral displacement (longitudinal). This is because a structure such as a column resists displacement in the direction). That is, it is desirable that the arrangement density (number) of lateral force bones be higher (more) than the arrangement density (number) of longitudinal force bones.
Then, the mesh size is about 2 horizontal to 1 vertical (= the density of lateral force bone is about twice the density of longitudinal bone). In the example described later, the opening (mesh) before deformation was preferably 25 × 50 mm. That is, in the embodiment, since the two adjacent lateral force bones have an appropriate shape deformed so that a trapezoidal peak is formed and one lateral force bone forms a valley, the construction management is easily performed. As for the wall body to be formed, the mesh lath and the mortar are firmly integrated.

  Further, since this mesh lath is deformed so that the trapezoidal peaks are continuously formed in the vertical direction, two or more lateral force bones forming the trapezoidal peaks also form valleys. One side force bone that is hardly deformed by this processing. Therefore, in principle, all lateral force bones are substantially straight, and all longitudinal force bones are formed of a flat part (= trapezoidal peak), an upwardly inclined part, and a downwardly inclined part. The mesh lath formed from the lateral force bone and the longitudinal force bone has a shape in which the flat surface (= the trapezoidal peak), the upward inclined surface, and the downward inclined surface are continuously repeated. In other words, in principle, only the longitudinal bone is deformed by this processing, and the resistance to the vertical direction is reduced by this processing, but the resistance to the lateral direction is maintained without any decrease by this processing. .

  Furthermore, the mesh lath may be preliminarily stretched and bonded (integrated) with various waterproof sheets such as waterproof paper, or the mesh lath after attaching a waterproof sheet separately during construction. A lath may be attached. In addition, as long as the mortar can be supported at the time of construction, it is not necessarily waterproof paper. For example, an alkali-resistant glass fiber net is pasted on a transparent plastic film such as a polyester film as shown in Examples described later. It has been confirmed that by using a laminated waterproof sheet having a combined structure, the entire body is translucent so that the base drum edge can be easily seen, it is strong against impact force, and the mortar is hardly broken.

The transparent plastic film used for the laminated waterproof sheet is not limited to a polyester (PET) film, but may be a polyethylene (PE) film, a polypropylene (PP) film, a polyvinyl chloride (PVC) film, etc. It has also been confirmed that 300 μm may be used.
Further, as the alkali-resistant glass fiber net, a basis weight of 150 g / m ² and a net size of 5 mm × 5 mm were used in the examples described later, but the same result can be obtained even with the same basis weight net size of 2 mm × 2 mm. As long as it has been confirmed and has a tensile strength equal to or higher than that, it is confirmed that not only a glass fiber net but also a carbon fiber net may be used.

The trapezoidal (square wave) mesh lath having such a configuration is formed through the following steps. In addition, it demonstrates here using the mesh lath with various waterproof sheets.
A process A in which a plurality of longitudinal force bones and a plurality of lateral force bones are combined in a lattice shape, and the intersections are integrated by spot welding or the like to form a welded wire mesh.
-Process B for bonding various waterproof sheets to the longitudinal force bone side of the welded wire mesh
Step C of deforming the welded wire mesh into a mesh lath in which two or more adjacent lateral force bones form a trapezoidal peak and one lateral force bone forms a valley.
Among these steps A to C, after performing step A (producing a welded wire mesh), any of steps B and C may be performed first or simultaneously. That is, various waterproof sheets may be bonded in a state of a welded wire mesh before forming a mesh lath, or may be bonded to a deformed mesh lath.

The mesh lath is not particularly required to be flat with respect to the edge shape in the vertical direction. That is, as described above, the mesh lath according to the present invention has a shape in which a flat surface (= trapezoidal peak), an ascending inclined surface, and a descending inclined surface are continuously repeated. Thus, at least when the edge shape in the vertical direction is an upward inclined surface or a downward inclined surface, the staple fixing interval can be made uniform, and the integrity of the mesh lath and the mortar is also better than when the edge shape is a flat surface. Get higher.
When the edge shape in the vertical direction is a flat surface, the overlapping portion of the mesh laths also has a flat surface shape, but this flat surface portion has low integration with the mortar. That is, as described above, all longitudinal bones are formed of a flat portion (= trapezoidal peak), an upward inclined portion, and a downward inclined portion. After applying mortar, both the flat and upward inclined portions are formed. Since the downward inclined portion is also located in the mortar layer, the integrity is high. However, the flat surface portion described above is located on the most back side of the mortar layer, and thus the integrity is low. In addition, when the edge shape of the said up-down direction is an uphill inclined surface or a downhill inclined surface, the overlapping part of mesh laths also becomes an inclined surface shape, and integration with mortar is high.

Further, the thickness (deformation height) of the mesh lath is set by the thickness of the wall surface structure to be formed. For example, when the thickness of the wall surface structure is set to 10 mm, it is slightly smaller than that, for example, 9 It is preferable to deform to ˜7 mm.
The weight of the wall structure acting on the mesh lath can be determined by determining the specific gravity when wet, specific gravity when drying, and coating thickness of the mortar to be used. The minimum required strength for holding the sheet is also known, but the strength of the mesh lath and the burden weight generated on the staples described later are set to be large (high) in anticipation of unexpected accidents, etc. There is no significant meaning in setting the numerical value of.

As a structure or substructure for fixing such a mesh lath, there is a structure such as a purlin or a substructure such as a brace, a stud, a trunk edge, or a subtrunk edge.
And as a 1st process, although the said mesh lath is fastened to these structures or substructures, stainless steel staples are used as the fixture.
This staple is for fixing the mesh lath valley to the structure or substructure, and is preferably fastened to the lateral force bone, longitudinal force bone located in the valley, or the intersection thereof, When fastened to a longitudinal force bone, high attachment strength is obtained, but the lateral force bone is easily displaced. Therefore, it is desirable to fasten to the lateral force bone. As described above, the pulling strength of the staple may be arbitrarily set within a range within the force in which the mesh lath and the mortar are integrated.
As described above, the wall thickness of the staple to be used is 10 mm, and the size of one opening is 25 × 50 mm using each SUS304 strength bone with a mesh lath of about 1.6 mm accordingly. In this case, the width was preferably 6 to 8 mm. Further, when the foot length was examined at 25 to 41 mm, a preferable result was 28, 32 mm, and the fastening interval was preferably 72 mm.

And, as the second step, coating is performed from the outside of the mesh lath (side force bone side) until there is no exposure of all the strength bones constituting the mesh lath (coating up to the mesh lath mountain) The wall surface structure can be constructed by applying mortar by a predetermined thickness. Since the deformation thickness of the mesh lath was calculated from the set thickness of the mortar and the deformation processing was performed, in this mortar coating (second step), all the strength bones constituting the mesh lath were exposed. It is only necessary to perform coating until there is no such state.
Moreover, about the composition of this mortar, various mortar compositions can be used according to the required characteristic, and the property and compounding composition in particular are not limited.

In addition, the ventilation wall according to the present invention and the net used in the construction method are laid down (embedded) on the surface layer while the mortar retains fluidity, In addition, the interlaminar strength of the surface layer of the mortar wall can be improved, and the integrity, flexibility, and rubber elasticity can be imparted, and prevention of the separation, cracking, and flying of the constituent materials can be achieved.
The net is not particularly specified as to the material or shape, and for example, a glass fiber net, an aramid fiber net, a vinylon fiber net, a carbon fiber net, and the like are appropriately selected. Especially in the case of a glass fiber net, a zirconia-containing net is used. Things are good. In particular, it is preferable to use a net having a selected mass of 40 to 250 g / m ² and a tensile strength of 100 kgf / mm ² or more from the record of use.

In the construction method of the wall surface structure of the present invention having such a configuration, the mesh lath deformed into a predetermined shape is arranged so that the waterproof sheet side and the longitudinal bone side are along, and the valley portion is made of stainless steel staples. And the second step of coating the mesh lath from the side of the lateral force bone to the state where there is no exposure of all the strength bones constituting the mesh lath.
A welded wire mesh in which a plurality of longitudinal force bones arranged on the inside and a plurality of lateral force bones arranged on the outside are combined in a lattice shape, and two or more adjacent side force bones form a trapezoidal peak. Since one lateral force bone has a thickness adjusted and deformed so as to form a valley, it is only necessary to apply a trowel along the side force bone from the outside, and smoothly apply the trowel It is possible to perform construction management that can be performed, and since uniform coating is performed, quality control can also be performed. In the deformation process, each longitudinal force bone is deformed, but the lateral force bone is not deformed. Therefore, the stress against the lateral displacement is high.
And by this construction method, a high-strength wall surface is easily constructed on the outside of the structural material or the substructure material.

And the construction method of the ventilation | gas_flowing wall surface of this invention is attached to the structural material or the substructure material, the front process which secures a ventilation layer by attaching a trunk edge or the fixing bracket for ventilation | gas_flowing, said 1st process, said 2nd process And a post-process for coating the finished mortar while concealing the net on the surface of the mortar.
The pre-process is a process for securing a ventilation layer in the structural material or the sub-structural material.
The first step and the second step are performed as described above as described above. That is, in the first step, the mesh lath after the deformation processing is arranged on the structural material or substructure so that the waterproof sheet side and the longitudinal force bone side are along, and the valley portion is fastened with stainless steel staples. . In the second step, coating is carried out until there is no exposure of all the strength bones constituting the mesh lath by applying from the lateral strength bone side of the mesh lath.
In the post-process, while the mortar constructed on the outside of the mesh lath retains fluidity, the net is laid down on the surface layer, which is not particularly difficult as a normal plastering technique.
As described above, the method for constructing a vent wall according to the present invention can be easily implemented using ordinary techniques in each process, and does not require special materials, equipment, or skilled skills. It has a high practical value.

In addition, the wall surface structure and the ventilation wall surface body obtained by the construction method of the present invention become a load-bearing wall with excellent durability having stable quality that has been managed as described above. By using a mesh lath with added bone, the fixing points of staples can be increased, so that a durable load bearing wall can be obtained without deteriorating the stable construction performance related to the mortar coating described above.
I will.
Here, the basic concept regarding the present invention will be described.
In producing a highly proof wall (bearing wall), it is necessary to exhibit its performance stably. If the wall receives force and breaks at an unintended location, stable performance will not be achieved. For example, it is difficult to predict how a part of a composite member such as a lath mortar part will break. However, when the bearing wall is broken by pulling out the staples driven into the base, it can be considered that at least the lath mole portion has a strength higher than the pullout strength of the staples, and only the method of pulling out the staples is solved ( The strength of the bearing wall can be determined by the type, number, and type of the base. Thus, it can be said that the most stable performance is exhibited when the bearing wall is broken in a form in which staples are pulled out as a criterion (trend) during development.

[the purpose]
The fracture property is confirmed by the difference in the shape of the lath net at the wall side end, and the characteristic value such as the proof stress is calculated experimentally. Thereby, the side edge part shape of the mortar bearing wall is determined.
[Study Summary]
The dimensions of the outer wall surface of the test body were 1810 mm in width and 2730 mm in height.

There are two types of mesh lath shapes as shown in FIGS. 1 (a) and 2 (a).
[No. 1];
The mesh lath A ("NTSM-1T9019" manufactured by Nikken Build, hereinafter simply referred to as NTSM-1T9019) shown in Fig. 1 (a) was used, and the wall side end was fixed at the point of crossing the skeleton [No. 2];
Longitudinal force bones are added to the end of the mesh lath A '("NTSM-1T9019" manufactured by Nikken Build, hereinafter simply referred to as NTSM-1T9019) shown in Fig. 2 (a). Fastened at the intersection of bones (there is one longitudinal force bone outside the fastened strength bone).
The position where the reinforcing longitudinal force bone was added to the No. 2 mesh lath was determined in consideration of the result of a crack generated in a preliminary test using the No. 1 mesh lath. Therefore, the test method and test results are shown in parallel below. Based on the preliminary test results using the No. 1 mesh lath, the position to apply the No. 2 mesh lath longitudinal force bone is determined. A comparative test was conducted again.

[1] Specimen (1) Details of the specimen are shown in Tables 1 and 2, with specimen No. 1 shown in FIGS. 3 and 4 and specimen No. 2 shown in FIGS. The staple shape is shown in FIG.

[2] Test method (1) The test conforms to the “Wheel bearing wall and its magnification performance evaluation work method manual” (hereinafter referred to as the load bearing wall work method manual) established by the designated evaluation organization.
(2) The test method is a column base fixed in-plane shear test, and an outline thereof is shown in FIG.
(3) The force application method is positive and negative alternating repeated force, and the principle of repetition is that the apparent shear deformation angle is 1/450, 1/300, 1/00, 1/150, 1/100, 1/75, 1 This was done during positive / negative deformation of / 50rad.
(4) The test was repeated three times at the same stage.
(5) After reaching the maximum load, apply force until the load decreases to 80% of the maximum load, or apply until the deformation angle of the specimen reaches 1/15 rad or more.

[3] Test result (1) The apparent shear deformation angle (γ) is calculated using the following equation.
γ = (H1-H2) / H
Where γ: Apparent shear deformation angle (rad)
H1: Horizontal displacement of the top of the specimen (mm)
H2: Horizontal displacement of test specimen leg (mm)
H: Distance between H1 and H2 (2) Load-shear deformation angle curves are shown in FIGS.
(3) The main destruction state of the test body was confirmed visually.
Specimen No. 1
Date of test: April 18, 2014 Destruction status: Pull out of staples ... 36.1%
: Staple break 8.7%
: Lass break ... 2.6%
: No floating or damage from the housing ・ ・ 54.8%
Specimen No. 2
Date of test: April 18, 2014 Destruction status: Pull out of staples ... 36.1%
: Staple break ... 5.2%
: Lass break ・ ・ ・ 3.0%
: No floating or damage from the housing ・ 55.7%
(4) When the occurrence of cracks on the mortar surface was visually confirmed, no cracks were observed.

The short-term standard shear strength was calculated in accordance with the evaluation method of the load-bearing wall work method.
(1) The envelope was prepared from the load on the ultimate force side-apparent shear deformation curve and is shown in FIG.
FIG. 11 shows a complete elasto-plastic model in each example.
(2) Table 3 shows characteristic values of the following four indices and short-term standard shear strength.
The calculation method is to calculate the 50% lower limit value by multiplying the yield strengths listed in (1) to (4) below by a variation coefficient, and the shortest standard shear strength is defined as the value with the smallest yield strength. In this test, the number of specimens was one, so the variation coefficient was 0.98.
(1) Yield strength Py
(2) Ultimate strength Pu ・ 0.2 ・ √ (2μ-1)
(3) Maximum proof stress Pmax · 2/3
(4) No load type: Yield strength P120 when the apparent shear deformation angle is 1 / 120rad

4-2. Calculation of magnification The magnification was calculated from the following formula from the short-term standard shear strength P ₀ and shown in Table 4. Here, the reduction coefficient α is not multiplied.
Trial scale factor = P ₀ x (1 / 1.96) x (1 / L) x α
Here, P ₀ : Short-term standard shear strength (kN) 1.96: Scale = 1 standard (kN / m)
L: Wall length (m) = 1.82m α: Reduction factor = 1

[5] Discussion With the mesh of 50 mm × 25 mm of φ1.6 mm being implemented, it was possible to obtain a high structural strength with V0832 or V0828 staples at a fastening location of 72 mm.
In the case of a staple having a higher pulling strength than that, mesh lath may come out from the mortar. When the mortar and the mesh lath are sufficiently integrated, the staples may break without coming off.
However, increasing the strength is expensive. By changing the wire diameter from φ1.6 mm to φ1.2 mm or φ1.4 mm and further reducing the mesh, it is possible to make a mesh lath that is not very expensive and that can be easily integrated with the mortar. In this case, the diameter of the staple is estimated to be about φ1.2 mm or φ1.4 mm, but it is presumed that the structural strength to be obtained is too small with a staple smaller than that. The shape of the shoulder portion of the staple is not particularly limited, such as a square shape or an arc shape, but the arc shape is less likely to break the staple.
Moreover, as a method of obtaining the same kind of performance, it was confirmed that there is a method of increasing the longitudinal force bone as shown in the test body No. 2 as a method of integrating the mesh lath and the mortar. Desirably, a staple can be applied at the intersection of the longitudinal force bone and the lateral force bone to achieve a stronger integration.
If the distance from the place where the staple is applied to the end of the mortar is small, the lath is easily removed from the mortar. This test was conducted as an improvement measure.
Even in the wave lath shape, the same type of performance can be obtained if the lath is the same and the staple lath is strong.

・ Investigation of waterproof paper As waterproofing paper for mesh lath, a regular waterproof paper (breathable waterproof sheet) and a transparent plastic film (PET film) with a thickness of 60 μm have a basis weight of 150 g / m ² and a net of 5 mm × 5 mm. A laminated waterproof sheet bonded with an alkali-resistant glass fiber net was compared.
Table 5 below shows the results of comparison of appearance (appearance) and impact resistance, where the former is “without net” and the latter is “with net”.

  From the results in Table 5 above, the laminated waterproof sheet having the above-mentioned configuration “with net” can be easily disposed at an appropriate position and fixed with staples because the base barrel edge can be seen through. It was confirmed that the mortar became resistant to impact force and further difficult to break.

Examination of the edge shape of the mesh lath As shown in FIG. 12E, the mesh lath A having the above-described configuration has a flat surface (= trapezoidal peak) 41, an ascending inclined surface 42, and a descending inclined surface 43 repeatedly. With regard to the edge shape in the vertical direction, one mesh lath A1 shown in FIGS. 12A and 12C has an edge shape in which a flat surface 44 is formed following the downward inclined surface 43. The other mesh lath A2 shown in FIGS. 12 (b) and 12 (d) is one in which an ascending inclined surface 42 is formed following the descending inclined surface 43 as in the case other than the end edge. In the figure, x indicates the length of the repeating unit, that is, the fixed interval between the staples B and B.

First, regarding the mesh laths A1 and A2, the connection modes adjacent in the vertical direction are compared.
As shown in FIG. 12A, the one mesh lath A1 is superposed so that the flat surfaces 44, 44 of the mesh laths A1, A1 adjacent in the vertical direction overlap each other, and the other mesh lath A2 As shown in FIG. 12B, polymerization is performed so that the upward inclined surfaces 42, 42 and the downward inclined surfaces 43, 43 of the mesh laths A2, A2 adjacent in the vertical direction overlap each other. In the figure, y2 indicates the overlapping length of the flat surfaces 44, 44, that is, the fixing interval of the staples B, B for fixing this overlapping portion, and y1 indicates that the upward inclined surfaces 42, 42 are inclined downward. The superposition | polymerization length of the surfaces 43 and 43 is shown.
In FIG. 12B, there is no need to separately fix the staple B, so that there is an advantage that the fixing interval of the staple B is uniform and the strength management is easy. On the other hand, in FIG. 12A, as described above, another staple B for holding the overlapped portion is required, and the mounting strength is also non-uniform, but the overlapping portion of the lath A1 does not swell and the advantage of being easy to apply mortar There is.

Next, regarding the mesh laths A1 and A2, the manners of storing the ends are compared.
Since the one mesh lath A1 has a flat surface 44 as shown in FIG. 12C, the unity between the mortar and the lath A1 is predicted to be low, and the selected staple B is too strong. In this case, the staple B cannot be removed and the lath A1 is peeled off from the mortar. On the other hand, in the other mesh lath A2, since the end portion is the upward inclined surface 42, it is predicted that the integrity of the mortar and the lath A2 will be high, and the staple B will be pulled out.
As a result, as for the mesh lath, the mesh lath A2 which is the upward inclined surface 42 or the downward inclined surface 43 has a staple B which is at least the edge shape in the vertical direction of the mesh lath A1 which is the flat surface 44. Can be made uniform, and the unity between the mesh lath A2 and the mortar is also high, which is desirable.

A mesh lath (No.1)
A 'mesh lath (No.2)
B Staple C Waterproof paper 11 Lateral force bone 11 'Lateral force bone forming valley 12 Longitudinal force bone 12' Added longitudinal force bone 31 Horizontal member 32 Receiving edge 33 Pillar 34 Trunk edge 35 Space pillar 36 Base 37 Joint 38 hole Down hardware 39 Square washer 41 Flat surface (top of mountain)
42 ascending slope 43 descending slope 44 flat surface

Claims (9)

A method of constructing a wall surface structure in which a mesh lath made of stainless steel wire mesh is fixed to a structural material or a substructure material, and a wall surface is formed by constructing a mortar so that the mesh lath is embedded,
The mesh lath is composed of a welded wire mesh in which a plurality of longitudinal force bones and a plurality of lateral force bones are combined in a lattice shape, and two or more adjacent lateral force bones form a trapezoidal peak, and a single lateral force. The bone is deformed so as to form a valley , and the trapezoidal peak, which is a flat surface, an upward inclined surface, and a downward inclined surface are repeatedly continuous ,
Is the boundary between the structural member or substructure material longitudinal forces bone mesh lath after the deformation toward the surface side from The rewritable arranged so that the order of the lateral force bone, the downward slope and an upstream inclined surface A first step of fastening the valley with stainless steel staples;
A second step of applying the mortar from the lateral force bone side of the mesh lath to the state where there is no exposure of all the strength bones constituting the mesh lath;
A method for constructing a wall structure characterized by comprising:   The method for constructing a wall surface structure according to claim 1, wherein the mesh lath combines a plurality of longitudinal force bones and a plurality of lateral force bones in a lattice shape so that a horizontally long opening is formed.   3. The wall structure according to claim 1, wherein the mesh lath is formed by combining a plurality of longitudinal force bones and a plurality of lateral force bones in a lattice shape and integrating and integrating them. Construction method.   The construction method for a wall structure according to any one of claims 1 to 3, wherein a laminated waterproof sheet having a structure in which a fiber net is bonded to a transparent plastic film is used as a waterproof paper of mesh lath. . A pre-process for securing a ventilation layer by attaching a fixing frame for a trunk edge or ventilation to a structural material or sub-structural material;
The first step according to any one of claims 1 to 4, the second step,
Furthermore, the post-process which coat | covers a finishing mortar while covering a net | network on the surface layer of the said mortar, The construction method of the ventilation wall surface body characterized by the above-mentioned.   6. The method for constructing a ventilated wall according to claim 5, wherein the net is a glass fiber net containing zirconia.   A wall surface structure that is constructed by the construction method according to any one of claims 1 to 4.   The wall structure according to claim 7, wherein a mesh lath added with reinforcing longitudinal bones is used.   A ventilation wall surface body constructed by the construction method according to claim 5 or 6.