JPH0733676B2 - Box Ditch Wall Material and Method for Forming Box Ditch Wall - Google Patents

Description

TECHNICAL FIELD The present invention relates to a box wall material for a box wall according to a hybrid structure in the field of civil engineering and construction, and various box wall materials using the box wall material, for example. It relates to a method of forming a box wall such as a basement of a building, a common ditch, a pit or a retaining wall.

(Prior Art) Reinforced concrete construction method is generally adopted for constructing a box wall such as a basement of a building, a common ditch, a pit or a retaining wall because of its economical efficiency. However, since the reinforced concrete construction method mainly involves on-site production work, the construction period is long, it requires a lot of manpower, and there are many problems with water stoppage. Therefore, in the industry, the construction period of Hakobuchi wall is shortened, There are high demands for labor saving in construction and improvement in reliability, and various new proposals have been made. Above all, the box wall with a hybrid structure that combines steel plate and concrete is
It has excellent rigidity and water resistance, and since the box wall material prefabricated at the local workshop or factory combines the performance of the formwork and the reinforcing material, the construction period has been shortened, and it has recently been particularly attracting attention.

The box wall material used for the hybrid structure is a pair of surface flat steel plates, and the inner surface of the flat steel plate is designed to be integrated with the concrete, so that the stiffeners such as L-shaped angle, T-shaped steel, flat bar, etc., or stud bolts, etc. Welded, and then made by connecting the flat steel plates to each other with web steel plates or through bolts at appropriate intervals, and forming the box wall, the wall material that was processed into a large block in advance to a predetermined size was installed on site. Then, the method of filling the inside of the box wall material with concrete is generally used, but various new proposals have been made in the industry in order to improve the workability of the box wall material or the adaptability to the usage form. ing. For example, Japanese Utility Model Application Laid-Open No. 62-34012 discloses a steel wall in which the flange portion of a stiffener formed by wrapping a core material in a thin steel sheet having a flange portion is joined to a flat steel sheet by spot welding to reduce thermal strain during stiffener welding. But again
Japanese Unexamined Patent Publication No. 64-80640 discloses a novel steel shell body which facilitates filling of prepacked concrete with aggregates by disposing a mortar injection outer pipe between a surface steel plate and a web steel plate.

(Problems to be solved by the invention) As described above, the box wall material used in the construction of the box wall with the hybrid structure is formed by welding various stiffeners or stud bolts to the inside of the flat steel plate, and further at appropriate intervals with a web steel plate or a through plate. Since it is basically manufactured by connecting flat steel plates to each other with bolts, it takes a lot of time and labor when welding stiffeners and web steel plates, and it is difficult to correct it due to large thermal distortion. When forming a wall using a material, it is difficult to butt-weld the surface flat steel plates at the joint between the box wall materials, and it is necessary to provide a separate connection plate.
It is said that both the price of the box wall material and the method of forming the box wall are expensive.

Also, in the process of forming the box wall, the box wall material in which the flat steel plates are connected to each other by the web steel plates has a poor filling workability of concrete because the filling space of concrete is partitioned by the web steel plate, and then the surface of The wall material in which the flat steel plates are connected to each other is poor in handleability because the rigidity of the wall material is low, and the through bolt is exposed on the surface. Furthermore, in the case of building a wall body having a complicated shape in a plane, it is necessary to produce various kinds of box wall materials corresponding to the shape, which further impairs the economical efficiency.

In view of the above problems, the present invention is a box which has high rigidity, excellent mechanical strength, is easy to produce and handle, is inexpensive, and has excellent performance in filling and adhering concrete. An object of the present invention is to provide a wall material for a box and a method for economically forming a wall for a box using the box wall material, which has good workability and high water-stopping property.

(Means for Solving the Problems) The present invention overcomes the above problems and achieves the above objects. The first invention is a truss or a grid between flange inner surfaces on one side or both sides of opposing channel steels. A second aspect of the present invention is a box wall material that is formed by forming a columnar frame by connecting with constant-width web members made of beams. Is a box wall material formed by connecting the webs of a constant number of the columnar frames to form a columnar frame and then sequentially abutting and fixing the webs of the desired number of the columnar frames to form a double wall surface block body. The third aspect of the present invention is to connect the mutually facing inner surfaces of the flanges of one side of the channel steel with a regularly spaced web material composed of a truss or a lattice beam, and then to keep the shape retaining metal pieces at appropriate intervals between the inner surfaces of the other flanges. To It is a box wall material that is fixed and formed into a columnar frame.

A fourth aspect of the present invention is to connect the inner side surfaces of one side flange of the channel steels facing each other with a constant-space web material composed of a truss or a lattice beam, and then hold the shape retaining metal pieces at appropriate intervals between the inner side surfaces of the other side flanges. Fixed to form a columnar frame,
Then, a desired number of the webs of the columnar frames are successively abutted and fixed to each other to form a double wall block body, and a fifth aspect of the present invention is a box wall material. The flange inner surfaces are connected to each other by a constant-space web material composed of trusses or lattice beams to form a columnar frame, and then a desired number of the columnar frame webs are sequentially abutted and fixed to each other to form a double wall block body. A female joint member is vertically installed at one end of the box wall material configured, and the female joint member of the box wall material and the open web end of the connecting box wall material are joint-fitted, and then the webs are mutually connected. It is a method of forming a box wall having a desired size by abutting and fixing.

A sixth aspect of the invention is to connect the inner side surfaces of one side flange of the channel steels facing each other with a constant-space web material composed of a truss or a lattice beam, and then hold the shape at an appropriate interval between the inner side surfaces of the other side flanges. A metal fitting is fixed to form a columnar frame, and then a desired number of the webs of the columnar frame are sequentially abutted and fixed to each other, and a female joint member is longitudinally attached to one end of the box wall material configured as a double wall block body. A method for forming a box wall having a desired size by jointly fitting the female joint member of the box wall material and the open web end of the connecting box wall material and then abutting and fixing the webs to each other Is.

(Function) The box wall material according to the present invention is formed by forming a columnar frame by connecting the inner side surfaces of the flanges on one or both sides of the facing channel steels with a constant-space web material composed of a transformer or a lattice beam. There is an advantage that the structure is extremely simple and easy to manufacture, and since the flange of the channel steel which is the constituent material has an action as a rib in the longitudinal direction, the mechanical strength is high, and the handling is also easy, It has good compatibility with filled concrete, and since the constant-interval web material functions as a reinforcing bar, it is possible to form a high-strength hybrid structure and the cost is low, so it is highly economical.

Further, the box wall material of the double wall surface block body according to the present invention is a columnar frame in which the inner side surfaces of the flanges on one side or both sides of the facing channel steels are connected by a constant spacing web material composed of a truss or a lattice beam. Is formed, and then the desired number of the webs of the columnar frames are sequentially abutted and fixed to each other to form a double-walled block body. Moreover, the building efficiency is good, and it is possible to significantly reduce the cost of building the box wall.

Further, in the present invention, the one side flange inner side surfaces of the facing channel steels are connected to each other by a constant spacing web material constituted by a truss or a lattice beam, and then the shape retaining metal objects are appropriately spaced between the other flange inner side surfaces. When using a box wall material that is fixed to and is formed in a columnar frame, the box material of a relatively small scale is used because the constituent materials are simpler and the cost is lower, and it is certain that the shape is maintained during handling. In construction, economical construction can be expected while maintaining mechanical reliability.

In addition, as a box wall material, the inside surfaces of one end flange of the above-mentioned facing channel steels are connected by a constant spacing web material composed of a truss or a lattice beam, and then the inside surfaces of the other flanges are appropriately spaced. In the same manner, the shape retaining metal is fixed to form a columnar frame, and then the desired number of the webs of the columnar frames are sequentially abutted and fixed to each other, and the double wall block body is used as the box wall material. Since it is possible to easily produce a product with a predetermined size in the local workplace or factory and to ensure that the shape is maintained during handling, the production and installation efficiency is good, and the cost for constructing a box wall is significantly high. It is possible to reduce.

Further, the inner side surfaces of the flanges on one side or both sides of the facing channel steels are connected to each other by a constant-space web material composed of a truss or a lattice beam to form a columnar frame, and then a desired number of the webs of the columnar frame are mutually connected. A female joint member is vertically installed at one end of a box wall material which is successively abutted and fixed to form a double wall block body, and the female wall joint material of the box wall material is connected and the box wall material is opened. The method of the present invention for forming a box wall of a desired size by fitting the web tips together and then abutting and fixing the webs to each other is a method in which the formed box wall has double steel walls at regular intervals. It is said that the structure is such that it is fixed by a web material, and that the steel wall has increased rigidity in the vertical direction due to the flange of the channel steel, which is the constituent material, so that the resistance force against the horizontal action is large and the loading force is also large. It also has its own features Handling since the structure itself is simpler excellent easy workability also in response to the strength requirements of Hakomizo to no purpose limited in size tolerance, can create an optimal Hakomizokabe.

Furthermore, concrete can be smoothly filled, and at that time, the flange and the constant-space web material act as reinforcing bars,
A solid hybrid structure with concrete can be formed.

Furthermore, the inner surface of one side flange of the channel steel facing each other is connected with a constant spacing web material composed of a truss or a lattice beam, and then the shape retention metal is fixed at an appropriate interval between the inner surface of the flange on the other side. A female joint member is vertically installed at one end of a box wall material formed into a frame, and then sequentially abutting and affixing the webs of the desired number of the columnar frames to each other to secure the webs. A method for forming a box wall of a desired size by fitting and fitting the open web ends of the box wall material to the female joint member of the box wall material, and then abutting and fixing the webs to each other is similarly maintained. Despite its excellent workability and workability, smooth handling and concrete filling, and high mechanical performance,
Since the number of constituent materials is small and the price is low, it is suitable for the construction of small and medium-sized box berths that do not require much mechanical strength, and can bring high economic effect.

(Embodiment) FIG. 1 is a partially cutaway schematic perspective view of a box wall 1 according to the present invention. The box wall 1 is a box joint wall material 2a, 2b, a female joint member 3 and an open web tip which will be described in detail later. It is constructed by fitting joints using 4a. Since the web 4 of the box wall material includes, in other words, the flange portion of the channel steel which is the constituent material, the same portion may be referred to as the channel steel flange 4 for convenience of description below.

Now, the box wall material 2a, 2b, the flange inner surface 6a, 6b, 6 of the channel steel 5a, 5b arranged so as to face the inside, respectively.
c and 6d are connected to each other by a constant-space web material composed of reinforcing bar trusses 7 and 7 (one reinforcing bar truss 7 is not shown for convenience of illustration) to form a columnar frame 8 of a unit, and then a desired number of the columnar columns. The webs of the frame 8 are successively brought into contact with each other and fixed by welding 9 (hereinafter, the fixing is also referred to as welding) to form a double wall block.

Next, 10 is a holding metal fitting made of equilateral angle steel, which is buried so as to slightly project from the rooting concrete 11, and the box wall material 2a is rooting concrete by a crane not shown.
When suspended above 11, the box wall material 2a is brought into contact with and pinched by the web protruding portion 4d, and the box wall material 2a is positioned through the web protruding portion 4d.

As described above, the box wall material 2a according to the present invention can be positioned easily and surely, and it is possible to efficiently construct a sturdy hybrid structure wall in which concrete is easily filled.

The holding metal fitting 10 can be appropriately adopted as long as it is a metal fitting having a holding function such as steel bar or U-shaped steel in addition to equilateral angle steel.

FIG. 2 is a partial perspective view for illustrating the columnar frame 8 according to the present invention in detail. As described above, the inner side surfaces 6a, 6b, 6c, 6d of the flanges of the channel steels 5a, 5b are connected to the reinforcing bar truss 7, A columnar frame 8 of a unit is formed by welding 12 through a fixed-interval web material made of 7 to connect them.

As described above, the columnar frame 8 of the present invention has a simple structure, is extremely easy to handle, has high rigidity, is well compatible with concrete, and has a steel structure, so that it can be freely connected by welding. Enables economical construction of a box wall.

As is clear from FIG. 2, when the inner flange surfaces 6a, 6b, 6c, 6d of the channel steels 5a, 5b are connected to each other by the constant-space web material composed of the reinforcing bar trusses 7,7, they are morphologically columnar. The frame is formed and the side on which the reinforcing bar trusses 7, 7 are arranged is the web 49
Therefore, the original web of the channel steels 5a and 5b becomes the flange 50 of the columnar frame.

In the present invention, the flange and the web of the columnar frame 8 are used in the meanings described above, and therefore, for convenience of description, the flanges of the channel steels 5a and 5b and the columnar frame 8 are used.
It should be understood that the web may refer to the same part.

Next, FIG. 3 shows a columnar frame 8 according to another embodiment.
In the schematic perspective view of FIG. 1, the columnar frame 8 is constructed as a unit member by welding 12 the inner side surfaces 6a, 6b of the flanges of the channel steels 5a, 5b to each other via a constant-space web material composed of the reinforcing bar truss 7. Therefore, there is a point that it is necessary to supplementarily use a morphological stabilizing method such as a rod-shaped spacer or clamp for supporting the flange at the time of handling, but the economical advantage is large because the number of materials is small, and the box There is little concern that mechanical problems will occur after building the wall.

FIG. 4 is a schematic perspective view of a columnar frame 8 suitable for a thick-walled box wall material when constructing a large-scale box, and is a constant-width web member formed by welding shaped steel into a rectangular frame member 13. Of the channel steels 5a, 5b by welding the inner surfaces 6a, 6b of the flanges on one side to each other, and is structurally strong and has a large resistance to the action from the vertical and horizontal directions. If further strength is required, a constant-space web material composed of the rectangular frame material 13 is welded to the inner surface of both side flanges of the channel steels 5a and 5b.

Next, FIGS. 5 and 6 are schematic perspective views of a columnar frame 8 according to another embodiment, in which the reinforcing bar truss 7 and the rectangular form 13 are provided on the inner surface 6a, 6b of one side flange of the channel steels 5a, 5b. Welded,
Shape retaining metal pieces such as shape retaining strips 47 and shape retaining steel bars 48 are fixed at appropriate intervals between the inner surfaces of the flanges on the other side. In this case, since the unit weight of the columnar frame 8 is small, it is economical and strong. It is highly utilized as a wall material for box tubs that is not in great demand.

As the grooved steel, shaped steel specified by JIS-G-3101, JIS-G-3350, lightweight shaped steel and various rolled steel sheets, as well as plated steel sheets and coated steel sheets formed into a groove shape Are used according to the purpose, but it goes without saying that they are appropriately selected in consideration of joining techniques such as welding and adhesion.

7 and 8 are a cross-sectional view and a front view of the box wall material 2b. In the present embodiment, the box wall material 2b has four columnar frames 8 connected to each other. Consider the strength and handling, connect any number as necessary.

Next, the box wall material, that is, the double wall surface block body 2b formed by mutually fixing the columnar frames 8 will be described in detail.

As shown in FIGS. 7 and 8, the webs 49a, 49b of the columnar frames 8a, 8b are brought into contact with each other so that the outer flanges 50 are aligned with each other on one plane, and the bending points of the webs and the flanges are fixed by successive welding. 9 to form the double wall surface block body 2b.

In FIG. 7, since the double wall surface block 2b is a joint connection, the surface of the web which is to be originally formed, that is, the left end face toward the drawing, is not welded with the constant-width web material, so that the flange of the channel steel projects. ing. Therefore, in the present invention, the protruding portion of the flange of the channel steel is referred to as an open web tip 4.

In this embodiment, the welding method is used for the fixing 9, but
Depending on the case, an adhesion method may be adopted.

Next, FIGS. 9, 10, and 11 are partial plan views, front views, and side views showing a situation in which the female joint member 3 is vertically installed at one end of the double wall surface block body 2a. With respect to a predetermined number of double wall surface block bodies 2a provided with the female joint member 3 in the above, the open web tip 4 of the double wall surface block body 2b (not shown) to be connected to the female joint member 3 as described above.
After the two are fitted together, the webs of the double wall surface block body are fixed to each other, whereby a box wall having a desired size can be formed.

In FIG. 11, reference numeral 15 is a through hole for inserting an electrode for fixing the female joint member 3 to the open web tip 4 by the spot welding method. The female joint member 3 is previously welded to the inside of the open web tip 4. After that, the reinforcing bar truss 7 may be fixed. Next, FIGS. 12, 13, and 14 are vertical cross-sectional views of the columnar frames 8a, 8c, and 8d according to the present invention. In the columnar frame 8a, the reinforcing bar truss 7 is used as the constant-space web material. 8c, angle steel 16 and columnar frame 8d
Uses steel strip 17

In the present invention, connecting the flange inner surfaces on one side or both sides of the facing channel steels with a constant-space web member made of a truss or a lattice beam means such a connection, and is appropriate without departing from the purpose. A connecting member can be used.

By the way, with respect to the box wall material according to the present invention, it is possible to easily form a desired long upright wall in the horizontal direction, as described above, but it is also very easy to connect in the right-angled direction, and it is shown in FIG. The partial plan view of FIG. 16 will be described.

FIG. 15 is a partial plan view for constructing a right angle part of the box wall, in which the web 4 of the double wall block body 2b is replaced with the double wall block body 2c.
9 shows a situation in which the end portion of the flange 18 is fixed by butt welding 9 and 19 is a weir plate.

FIG. 16 is a partial plan view in the case of constructing a right-angled wall, for example, a partition wall in the middle of the box wall, in which the web 4 of the double wall surface block body 2b is placed at the central portion of the flange 18 of the double wall surface block body 2c. In the present invention, the double wall surface block body has a buttable web, and the flange is a flat surface, so that the butt welding can be performed easily and reliably. It is possible to construct partition walls at any place on the wall, and it is easy to construct surrounding walls such as wells and pits.

Thus, in the present invention, when welding a columnar frame or a double wall surface block body, deformation occurs due to processing strain or improper handling during transportation, and when the gap is too wide during welding,
As shown by the broken line in the figure, means for attracting each other such as using a temporary fitting 20 and a bolt 21 are adopted, but since these means are well known, detailed description thereof will be omitted.

By the way, the box wall material according to the present invention is very easy to combine with the frame rebars of the floor and ceiling when constructing a building, and since the filling of reinforced concrete can be carried out smoothly, structurally It is possible to quickly form a very rigid box wall, and as a result, many types of box walls can be economically constructed.

Fig. 17 is a partial cross-sectional view showing a situation in which a bottom plate of a building is constructed using the box wall material according to the present invention, Fig. 18 shows the same upper plate connection, and Fig. 19 shows an intermediate floor connection.

In FIGS. 17 to 19, 22 is a through reinforcing bar, 23 is an auxiliary reinforcing bar, and the through reinforcing bar 23 is appropriately connected by a coupler 24.

Reference numeral 25 is a stud dovetail which is appropriately planted in the double wall block body 2c, 26 is an anchor nut, and 27 is a swelling rubber for stopping water.

The stud dowel 25 and the anchor nut 26 are covered with protective concrete 28.

Reference numeral 29 is sidewall concrete filled in the cavity of the double wall block body 2c, and 30 is bottom slab concrete.

Further, 31 is a fulcrum plate of the deck plate 32, and 33 is an upper concrete plate.

34 is a capping hardware, 35 is a fulcrum angle, 36 is a sharkey, and 37 is an intermediate floor concrete.

Except for the double wall surface block body 2c, the coupling means shown in FIGS. 17 to 19 are well known, and therefore detailed description thereof will be omitted.

Next, an example in which the box wall material and the box wall forming method of the present invention are used for constructing an underground buried type common groove, will be described with reference to FIGS.
It will be explained according to the construction guide in Figure 27.

As the construction procedure, as shown in FIG. 20, excavating using the power shovel 39 according to the predetermined dimensions of the common groove 38 to be constructed shown by the broken line, and then arranging the reinforcing bars 40 as shown in FIG. 21, The sandwiching metal fitting 10 described in FIG. 1 is planted, and then the slab concrete 41 is placed.

Furthermore, as shown in FIG.
Then, as shown in FIG. 23, the step of installing the box wall material 2 oppositely using the moving stand 43 is repeated, and the fulcrum plate 31 is welded to the box wall material 2.

Further, the beam 44 and the deck plate 45 are attached in the order of Fig. 24 and Fig. 25, and as shown in Fig. 26, concrete placing between the box wall 1 and the upper slab concrete 33 is carried out, and finally the 27th. Backfilling 46 is performed as shown in the figure to complete the common groove 38.

(Effects of the Invention) The box wall material of the present invention is easy to manufacture, yet has extremely high rigidity, has excellent characteristics in terms of mechanical strength and handling, and is low in price. Since it has excellent properties such as the bondability with the core rebar as well as the filling and adhesion of concrete, the practical effect is extremely great.

Further, the box wall method using the box wall material, since only a female joint is provided at one end of the box wall material, because it is possible to complete a long box wall in a short period as desired, as a result, Since many types of boxes can be constructed economically, the economic effect is extremely large.

[Brief description of drawings]

FIG. 1 is a partially cutaway schematic perspective view of a box wall according to the present invention,
2 is a partial schematic perspective view of a columnar frame, FIG. 3 is a partially cutaway schematic perspective view of a columnar frame according to another embodiment, and FIG. 4 is a partial schematic perspective view of another columnar frame, FIG. 5 and FIG. FIG. 6 is a schematic perspective view of a powder part of a columnar frame according to an embodiment having a shape retainer, FIG. 7 is a cross-sectional plan view of a double wall surface block body, FIG. 8 is a partially cutaway front view thereof, and FIGS. FIG. 11 shows a situation in which a female joint member is vertically installed at one end of a double wall block body. FIG. 9 is a partial plan view, FIG. 10 is a front view, and 11 is a side view. is there. 12, 13 and 14 are vertical cross-sectional views of columnar frames that can be used in the embodiments of the present invention, FIG. 15 is a partial plan view for constructing a right angle part of a box wall, and FIG. 16 is a partition wall. Fig. 17 is a partial cross-sectional view showing a situation in which a bottom slab of a building is constructed using the box wall material according to the present invention, and Fig. 18 is a partial cross-sectional view showing upper plate connection. FIG. 19 is a partial cross-sectional view showing an intermediate floor connection, and FIGS. 20 to 27 are sequential explanatory views for constructing a common groove embodying the present invention. 1 ... Box wall, 2a, 2b ... Box wall material, 3 ... Female joint member, 4 ... Web, 4a ... Open web tip, 4b ... Web protrusion, 5a, 5b ... Channel shape Steel, 6a, 6b, 6c, 6d …… Flange inner surface, 7 …… Reinforcement truss, 8 …… Column frame, 9…
… Sticking (welding), 10… Clamping fittings, 11… Rooted concrete, 12… Welding, 13… Rectangular frame material, 14… Lip channel steel frame, 15… Through hole for electrode insertion, 16 …… Angle steel, 17 …… Strip steel plate, 18 …… Flange, 19 …… Dam plate, 20
…… Temporary fittings, 21 …… Bolts, 22 …… Through rebars, 23…
… Auxiliary rebar, 24 …… Coupler, 25 …… Stud dowel, 26 …… Anchor nut, 27 …… Swelling rubber for stopping water,
28 …… Protective concrete, 29 …… Sidewall concrete, 30
…… Bottom slab concrete, 31 …… fulcrum plate, 32 …… deck plate, 33 …… upper slab concrete, 34 …… capping hardware, 35 …… fulcrum angle, 36 …… Sherkey,
37 …… Intermediate floor concrete, 38 …… Common groove, 39 …… Power shovel, 40 …… Reinforcing bar, 41 …… Slab concrete, 42
...... Crane truck, 43 …… Transfer stand, 44 …… Beam,
45 …… Deck plate, 46 …… Backfill, 47 …… Shape retention strip, 48 …… Shape retention steel bar, 49 …… Web, 50 …… Flange

Claims (6)

[Claims] Claims: 1. A box wall material formed by forming columnar frames by connecting the inner side surfaces of the flanges on one side or both sides of the facing channel steels with a constant spacing web material composed of a truss or a lattice beam. 2. A columnar frame is formed by connecting the flange inner surfaces on one side or both sides of the facing channel steels to each other with a constant spacing web material composed of a truss or a lattice beam, and then a desired number of the webs of the columnar frames. A box wall material that is constructed by forming a double wall block by sequentially abutting and fixing each other. 3. The opposing inner surface of one side flange of the channel steel is connected by a constant spacing web material composed of a truss or a lattice beam, and then shape retaining members are provided at appropriate intervals between the inner surface of the flange on the other side. Box wall material that is fixed and formed into a columnar frame. 4. A pair of opposing groove inner side inner surfaces of a flange are connected to each other by a constant spacing web member composed of a truss or a lattice beam, and then shape retaining members are provided at appropriate intervals between the other inner side flange inner surfaces. A box-and-wall material which is fixed to form a columnar frame, and then a desired number of the webs of the columnar frames are successively abutted and fixed to each other to form a double wall surface block body. 5. A columnar frame is formed by connecting the inner side surfaces of the flanges on one or both sides of the facing channel steels with a constant spacing web member composed of a truss or a lattice beam, and then forming a columnar frame of a desired number. A female joint member is vertically installed at one end of a box wall material constituted by a double wall surface block body by sequentially abutting and affixing webs to each other, and the box joint material of the box wall material is provided continuously with the female joint member. A method of forming a box wall having a desired size by fitting and fitting the open web ends of wall materials and then abutting and fixing the webs to each other. 6. A pair of opposing groove inner side inner surfaces of a flange are connected to each other by a constant spacing web member composed of a truss or a lattice beam, and then shape retaining members are formed at appropriate intervals between the other inner flange side surfaces. A columnar frame is fixedly formed, and then a desired number of the webs of the columnar frame are sequentially abutted and fixed to each other, and a female joint member is vertically provided at one end of a box wall material configured as a double wall block body. At the same time, the female joint member of the box wall material is connected to the open web tip of the connecting box wall material by joint fitting, and then the webs are abutted and fixed to each other to form a box wall of a desired size.