JP2001279852A - Half precast wall member and civil engineering construction method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wall member capable of reducing or eliminating maintenance after construction work when a side wall part is constructed at a high place and provide a wall member dispensing with the assembly of a scaffold and a civil engineering construction method using the wall member. SOLUTION: Inner forms 15 are provided across a predetermined interval on an inner side in a floor part 5 while a half precast wall member 1 rises in an end part on an upper face side 5B in the floor part 5. A scattering prevention wall part 2 is provided so as to protrude at a higher position than an upper face of the inner form 15 on an upper end side of the wall member 1. Concrete 4 is poured into a ready mixed concrete pouring space 16 formed between the wall member 1 and the inner form 15 and is hardened to integrate the concrete 4 with the wall member 1 so as to form a side wall part 3. Even if the concrete 4 tends to scatter outward when the concrete 4 is placed, scattering of the concrete 4 is prevented by the scattering prevention wall part 2 to avoid a danger in a lower part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a half precast wall member and a civil engineering construction method using the half precast wall member.

[0002]

2. Description of the Related Art FIG. 9 and FIG.
The situation when civil engineering construction work is performed at a high place, such as the concrete wall 105 of the building 109 on the slope 108 along 0, is shown. As shown in FIG. 10, a wooden formwork 102 is set up on a side edge 101A of the concrete floor 101, and a wooden form 102 is provided inside the concrete floor 101 with a predetermined gap from the wooden formwork 102. An inner mold 106 composed of a frame is provided. A fresh concrete pouring space 107 is formed between the wooden formwork 102 and the inner formwork 106, and concrete 1 is provided in this space.
03 is poured and hardened to form a concrete wall 105.

[0003]

However, in the above civil engineering and construction work, after the concrete fence 105 is completed, both the outer and inner formwork 102 and 106 must be removed. Also, when performing the work at a high place as described above, in order to prevent the concrete 103 before hardening from scattering over the upper edge of the wooden formwork 102 during the concrete placing work, The scaffolding 100 had to be extended from the side edge of the floor 101 to ensure safety and to remove the formwork 102. The scaffolding 100 is also removed when the civil engineering and construction work is completed, which causes an increase in the construction cost.

[0004] In order to solve such a problem, the outer wooden formwork 102 is made of iron plate, and concrete 1
A civil engineering construction method has been proposed in which the work of removing the formwork provided on the outer edge of the concrete floor portion 101 is omitted by integrating with the concrete floor portion 101. However, when such an iron plate is used, the painting or the iron plate itself is damaged over a long period of time, so that it is necessary to perform maintenance every predetermined period. Furthermore, when an iron plate is used, the joint between the concrete 103 and the iron plate is formed on the top end surface. Therefore, even if a sealing material is provided at the joint, rainwater or the like may enter the joint. As a result, there is a problem that the joined portion is expanded due to freezing and thawing, rusting, and the like, and the corrosion further proceeds. The present invention
The present invention has been made in view of the above circumstances, and an object thereof is to provide a wall member capable of reducing or completely eliminating the need for maintenance after the construction, particularly when performing the construction of a side wall portion at a high place. Another object of the present invention is to provide a wall member that does not require a scaffold and a civil engineering construction method using the wall member.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a half precast wall member according to the first aspect of the present invention is used for civil engineering construction work in which a side wall is formed at an upper end of a floor at a high place. In the state where it is raised at the upper side end of the floor, concrete is cast inside the same member installed and fixed at the floor end, hardened and integrated. The side wall portion is formed in a state in which the side wall is bent. The “high place” refers to a place where a side wall portion such as a building fence, a retaining wall, an elevated road or the like on a slope should be formed. In particular, it indicates a construction site where a scaffold must be assembled in a hollow in the conventional civil engineering construction method.
According to a second aspect of the present invention, in the first aspect, a scattering prevention wall portion is provided on an upper portion of the half precast wall member. The invention according to claim 3 is the invention according to claim 2, wherein the thickness of the scattering prevention wall portion is formed to be thicker with a step than the thickness of the half precast wall member below it. It is characterized by having.

According to a fourth aspect of the present invention, in the side wall portion formed by integrating the half precast wall member according to the third aspect and the concrete, the upper surface side of the concrete faces the inside of the floor portion. The half precast wall member and the concrete are assembled with each other and are inclined. According to a fifth aspect of the present invention, in the state where the half precast wall member according to the second or third aspect is raised at an upper end of the floor, an inner formwork is provided inside the floor at a predetermined interval. Is provided, concrete is poured into a ready-mixed concrete pouring space formed between the wall member and the inner formwork, and the concrete is hardened, so that the concrete and the half precast wall member are integrated to form a side wall portion. This is a civil construction method using a half precast wall member.

[0007]

According to the first aspect of the present invention, the half precast wall member is raised at the upper end of the floor portion on the upper surface side, and is provided in the space between the half precast wall member and the inner formwork provided inside the floor portion. The poured concrete is hardened and integrated to form a side wall. As described above, since the half precast wall member is integrated with the concrete cast later and forms the outer surface side of the side wall portion, there is no rust or peeling of the paint compared to the conventional steel plate, Maintenance can be reduced or eliminated altogether. According to the invention of claim 2, since the scattering prevention wall is provided on the upper part of the half precast wall member, for example, when concrete is poured from the chute of the ready-mixed concrete car, the concrete to be scattered is prevented from scattering. Since the part is stopped, scattering of concrete can be prevented.
For this reason, it is not necessary to form a scaffold from the side edge of the floor.

According to the third aspect of the present invention, in the completed side wall portion, the joint between the concrete and the half precast wall member is the lower edge of the scattering prevention wall portion. At this time, the scattering prevention wall portion is formed thicker with a step than the wall member below it, so that the joint portion faces the inner surface side of the floor portion. For this reason, it is possible to prevent infiltration of rainwater as compared with the conventional case where the joining portion is on the top end surface. According to the invention of claim 4, the upper surface side of the concrete in the side wall portion is inclined toward the inside of the floor portion. For this reason, for example, rainwater or the like flows toward the inside of the floor, so that it is possible to avoid a situation where water enters the joint between the wall member and the concrete.

According to the fifth aspect of the present invention, the scattering prevention wall portion of the half precast wall member protrudes toward the upper end side from the upper end surface when the concrete is cast. When the concrete is poured into the ready-mixed concrete pouring space, the scattering prevention wall stops the concrete to be scattered, so that the scattering of the concrete can be prevented. For this reason, when performing civil engineering construction work at a high place, it is not necessary to form a scaffold that projects to the side edge of the floor for ensuring safety below.

[0010]

Next, an embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 shows a half precast wall member 1 of the present embodiment (hereinafter, simply referred to as “wall member 1”). The wall member 1 is manufactured in a place different from the place where the wall member 1 is installed in advance. The wall member 1 is formed in a substantially rectangular flat plate shape, and a scattering prevention wall portion 2 is provided at an upper edge portion thereof. When forming the side wall portion 3 as described later, the scattering prevention wall portion 2 is higher than the concrete to be cast later so as to protrude toward the upper end side from the upper end surface of the concrete when the concrete 4 is cast. Has a high dimension setting. Further, the thickness A of the scattering prevention wall portion 2 is smaller than the thickness B of the wall member 1 therebelow by a step 2A.
And is formed thicker. In the wall member 1, the side on which the scattering prevention wall 2 is protruded is the floor 5.
Is formed so as to face the inside.

On the inner surface side (the surface side shown in FIG. 1) of the wall member 1, an insert nut 6 of a predetermined size (a nut with an internal thread cut on the inner surface) forms the wall member 1. Is hardened in a state of being inserted in advance. A fixing member 7 and a separator 8 are connected to the insert nut 6 as described later. As shown in FIG. 2, the wall member 1 is set up near the side edge 5A of the concrete floor 5, and the concrete 4 is cast inside the wall member 1. On the upper surface 5B (the surface shown in FIG. 2) of the floor 5, a stud bar 9 is protrudingly provided at a predetermined position, and a reinforcing bar 10 and the like are connected to the side wall 3 when the side wall 3 is formed. You.

Next, a method of civil engineering construction for forming the side wall 3 near the side edge 5A of the floor 5 will be described with reference to FIGS. First, as shown in FIG. 3, the wall member 1 is fixed on the upper surface side 5B of the floor portion 5 in an upright state. At a predetermined position on the upper surface side 5B, a rectangular connection member 11 is paired as shown in FIG.
FIG. 3 shows a pair of wall members 1 near both ends in the longitudinal direction.
, The wall member 1 is fixed by a total of four connecting members 11. The wall member 1 is fixed by using a hole opened in the connecting member 11. That is, a pair of upper and lower L-shaped fixing members 7 are fixed to the wall member 1 by the bolts 12 using the insert nut 6,
The other side portion of the fixing member 7 is fixed by a bolt 12 directly or via an intermediate member 13. In addition, on the upper surface side 5B of the floor portion 5 and the lower edge portion of the wall member 1,
A packing 14 made of an elastic member is provided in order to prevent the concrete 4 from being set. Similarly, a packing 14 made of an elastic member is also provided at a connection portion between the two wall members 1.
Is provided. In addition, between the wall member 1 on the upper surface side 5B and the inner form 15,
0 is arranged.

Next, the inside of the floor 5 (right side in FIG. 6).
On the side wall portion 3 (on the side opposite to the wall member 1), the inner mold 15 is provided at a predetermined interval. This inner form 15 is
This is a mold forming the inner surface side of the side wall portion 3, and is formed of, for example, a wooden frame. After the concrete 4 is hardened and the side wall 3 is formed, it is removed. The height of the inner form 15 is set to be lower than the height of the wall member 1 and lower than the position of the step 2A of the scattering prevention wall portion 2.

Thus, when the inner formwork 15 is installed,
A fresh concrete pouring space 16 is formed between the wall member 1 and the inner formwork 15. One end of an iron rod-shaped separator 8 is screwed to the wall member 1 using an insert nut 6, and the other end of the separator 8 is an inner mold 1.
Positioning is performed by a fixing member 17 provided inside (the left side in FIG. 6) of the fifth member 5. Further, the screw member 18 is screwed to the fixing member 17 from the outside (the right side in FIG. 6) of the inner form 15,
The inner mold 15 and the wall member 1 maintain a predetermined distance via the separator 8 to prevent harami due to the side pressure of the ready-mixed concrete.

Next, as shown in FIG. 6, the uncured concrete 4 is poured into the ready-mixed concrete pouring space 16 through a chute 19 of a ready-mixed concrete car (not shown), for example. In the case of this concrete placing operation, even if the concrete 4 scatters and tries to get over the upper edge of the wall member 1, the scattering prevention wall 2 is provided, so that the concrete 4 is prevented from scattering. .

Thus, the fresh concrete pouring space 1
After the concrete 4 is poured into the concrete 6, the concrete 4 hardens. Note that the upper end surface of the concrete 4 is located slightly below the step 2A of the scattering prevention wall portion 2 (that is, the gap 20 is provided toward the inside of the floor portion 5). . Also, before the concrete 4 is appropriately hardened and before it is completely hardened, the upper surface of the concrete 4 is leveled with a trowel or mortar is provided so that the inclined surface 4A is inclined toward the inside of the floor 5. (See FIG. 7). Concrete 4
After the hardening, the inner side frame 15 is removed to form the side wall 3 in which the wall member 1 and the concrete 4 are integrated. The gap 20 is filled with a sealing material 21 to prevent water or the like from entering the gap 20. In addition,
On the wall (side wall 3) of the building above the slope in this embodiment, a projecting portion is formed on a part of the inner formwork 15 at an appropriate interval so as to project toward the inside of the floor 5. It is common to provide a retaining wall.

As described above, according to the present embodiment, the wall member 1
Is raised on the upper surface side 5B of the floor portion 5, an inner formwork 15 is provided inside, and the concrete 4 is poured into a fresh concrete pouring space 16 formed between the inner formwork 15 and the wall member 1. Then, the side wall 3 is formed by being cured. At this time, the concrete wall member 1
The side walls 3 are integrated with the concrete 4. As described above, since the wall member 1 forms the outer surface side of the side wall portion 3, there is no rust, corrosion, or the like as compared with the conventional iron plate side wall, so that maintenance can be reduced or eliminated altogether.

The scattering prevention wall 2 of the wall member 1 is installed so as to protrude higher toward the upper end side than the inner form 15 when the concrete 4 is cast. For this reason, for example, when the concrete 4 is poured into the ready-mixed concrete pouring space 16 from the chute 19 of the ready-mixed concrete vehicle, the scattering prevention wall 2 stops the concrete 4 to be scattered, so that the scattering of the concrete 4 can be prevented. For this reason,
In particular, when forming the side wall 3 at a high place, the floor 5
It is not necessary to assemble the scaffold outside the side edge 5A.

Further, in the completed side wall 3, the joint between the concrete 4 and the wall member 1 is formed at the lower edge of the shatterproof wall 2. At this time, since the scattering prevention wall portion 2 is formed to be thicker with the step 2A than the wall member 1 below it, the joint portion faces the inner surface side of the floor portion 5. For this reason, it is possible to prevent rainwater or the like from entering as compared with the conventional case where the joint portion is on the top end surface.

Further, the upper surface side of the concrete 4 in the side wall portion 3 has an inclined surface 4A inclined toward the inside of the floor portion 5.
Are formed. For this reason, since rainwater or the like flows toward the inside of the floor 5, it is possible to avoid a situation in which water enters the joint between the wall member 1 and the concrete 4.

The configuration in which the wall member 1 is raised on the upper surface of the floor 5 is not limited to the above embodiment, but may be as shown in FIG. 8, for example. In this example, a fixing member 30 having an L-shaped cross section and a vertically long length is used. An insert bolt 31 is provided in the wall member 1, and a bolt hole 30 provided in the fixing member 30 is provided.
The fixing member 30 is connected using A. The technical scope of the present invention is not limited by the above-described embodiment, and can be suitably implemented, for example, for work at high places such as a retaining wall on a slope, an elevated road or a bridge railing. .

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a half precast wall member according to the present embodiment.

FIG. 2 is a partial perspective view showing an upper surface side of a floor.

FIG. 3 is a side cross-sectional view when a half precast wall member is set up at an end of an upper surface side of a floor.

FIG. 4 is a partially enlarged plan view showing a state in which a half precast wall member is raised at the upper end of the floor.

FIG. 5 is a partially enlarged front view showing a state in which a half precast wall member is raised at the upper end of the floor portion.

FIG. 6 is a side sectional view showing a state in which an inner formwork is attached to an inner side of a floor portion and concrete is poured into a fresh concrete pouring space.

FIG. 7 is a side sectional view when a half precast wall member and concrete are integrated and a side wall portion is completed.

FIG. 8 is a side cross-sectional view showing a state in which a half precast wall member is raised at an upper side end of a floor in another embodiment.

FIG. 9 is a schematic view showing a building fence on a slope on one side of a road in a conventional example.

FIG. 10 is a side sectional view showing a state of a concrete placing operation when forming a side wall portion on the upper surface side of a floor portion in a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Half precast wall member 2 ... Shatterproof wall 2A ... Step 3 ... Side wall 4 ... Concrete 4A ... Slope 5 ... Floor 15 ... Inner formwork 16 ... Fresh concrete pouring space

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) E04C 2/38 E04C 2/38 J E04B 2/00 2/46 J (72) Inventor Tsunehiko Koike Nagoya, Aichi 2-1, 1-1 Kiyokawa-cho, Nakagawa-ku, Takigami Industry Co., Ltd. (72) Inventor Yoshinobu Nakajima, Shiogagi-cho, Minato-ku, Nagoya-shi, Aichi (No. 10) Tokai Concrete Industry Co., Ltd. F-term (reference) in Tokai Concrete Industry Co., Ltd., Shionagi-cho, Minato-ku, Nagoya-shi (No. 10) 2D048 AA83 2D059 AA21 BB37 DD16 2E162 CA11

Claims (5)

[Claims] 1. A half precast wall member used in civil engineering construction work for forming a side wall at an upper end of a floor at a high position, wherein the half precast wall is raised at an upper end of the floor. The half precast wall member, wherein the side wall portion is formed in a state where concrete is poured and hardened and integrated into the same member fixed and installed at the floor end and the inside thereof in the laid state. 2. The half precast wall member according to claim 1, wherein a scattering prevention wall portion is provided on an upper portion of the half precast wall member. 3. The scatter prevention wall portion according to claim 2, wherein the thickness of the half-precast wall member below the scatter prevention wall portion is made thicker with a step. Half precast wall members. 4. The side wall formed by integrating the half precast wall member and the concrete according to claim 3, wherein the upper surface side of the concrete is inclined toward the inside of the floor. An assembling structure of a half precast wall member and concrete. 5. In a state where the half precast wall member according to claim 2 or 3 is raised on an upper surface side end of a floor,
An inner formwork is provided at a predetermined interval inside the floor, and concrete is poured into a ready-mixed concrete pouring space formed between the wall member and the inner formwork, and the concrete is hardened. And a half precast wall member integrated with the half precast wall member to form a side wall portion.