JP3636960B2 - Half precast wall member and civil engineering construction method using the half precast wall member - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a half precast wall member, a civil engineering construction method using the half precast wall member, and the like.
[0002]
[Prior art]
FIG. 9 and FIG. 10 show a state in which civil engineering and construction work is performed at a high place such as a concrete fence 105 of a building 109 on a slope 108 along the road 110, for example. As shown in FIG. 10, a wooden formwork 102 is raised on the side edge 101 </ b> A of the concrete floor portion 101, and a wood is placed inside the concrete floor portion 101 with a predetermined gap from the wooden formwork 102. An inner mold 106 made of a frame is provided. A fresh concrete pouring space 107 is formed between the wooden formwork 102 and the inner formwork 106, and the concrete 103 is poured into this space and hardened to form a concrete cage 105.
[0003]
[Problems to be solved by the invention]
However, in the civil engineering construction described above, after the concrete fence 105 is completed, both the outer and inner molds 102 and 106 must be removed. In addition, when working at a high place as described above, in order to prevent the concrete 103 before hardening from getting over the upper edge of the wooden formwork 102 and scattering during the concrete placing work, The scaffold 100 had to be overhanged from the side edge of the floor 101 for safety and for the work of removing the formwork 102. Since this scaffold 100 is also removed when the civil engineering construction is completed, it causes an increase in construction costs.
[0004]
In order to solve such a problem, the outer wooden formwork 102 is made of iron plate, and is integrated with the concrete 103, thereby eliminating the work of removing the formwork provided on the outer edge of the concrete floor portion 101. A construction method has been proposed.
However, when such an iron plate is used, the coating 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 portion between the concrete 103 and the iron plate is formed on the top end surface, so even if a sealing material is provided at the joint portion, rainwater or the like enters from the joint portion. As a result, there is a problem that the joint portion expands due to freezing and thawing, rusting, etc., and further corrosion proceeds.
The present invention has been made in view of the circumstances described above, and its purpose is to reduce the maintenance after construction or make it unnecessary at all, particularly when the side wall portion is constructed at a high place. It is to provide a member, and also to provide a wall member that does not require a scaffold and a civil engineering construction method using the wall member.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the half precast wall member according to the invention of claim 1 is a half precast wall member used in civil engineering construction work in which a side wall portion is formed on the upper surface side end portion of the floor portion at a high place. The concrete is cast and hardened integrally with the half precast wall member installed and fixed at the upper surface side end portion of the floor portion while being raised at the upper surface side end portion of the floor portion. The side wall portion is formed in a state of being formed , and an anti-scattering wall portion is provided on the upper portion of the half precast wall member so as to jump out from the upper end surface when the concrete is placed. In addition, the scattering prevention wall portion is formed to have a thickness higher than that of the half precast wall member below the half precast wall member. In Yasuto wall member, characterized in that side the scattering prevention walls are protruded is to face the inside of the floor.
“High place” refers to a place where a side wall such as a wall of a building on a slope, a retaining wall, an elevated road or the like should be formed. In particular, the conventional civil engineering construction method indicates a construction place where a scaffold must be formed in the hollow.
[0006]
A second aspect of the present invention, in the side wall portion formed by integrating the said concrete and Precast wall member according to claim 1, the upper surface of the concrete is inclined toward the inside of the floor It is the assembly structure of the half precast wall member and concrete characterized by the above-mentioned.
According to a third aspect of the present invention, in the state where the half precast wall member according to the first aspect is raised at the upper surface side end portion of the floor portion, an inner mold is provided at a predetermined interval on the inner side of the floor portion. And pouring the concrete into a ready-mixed concrete pouring space formed between the wall member and the inner mold so that the upper end surface is slightly below the step of the anti-scattering wall. The civil engineering construction method using the half precast wall member, wherein the concrete and the half precast wall member are integrated to form a side wall portion.
[0007]
Operation of the invention and effect of the invention
According to the invention of claim 1, the half precast wall member is raised at the upper surface side end portion of the floor portion, and the concrete poured into the space with the inner formwork provided inside the floor portion is cured and integrated. As a result, a side wall portion is formed. In this way, the half precast wall member is integrated with the concrete placed later to form the outer surface side of the side wall, so there is no rust or paint peeling as compared to the conventional steel plate, Maintenance can be reduced or eliminated altogether.
In addition, since the anti-scattering wall portion is provided on the upper part of the half precast wall member, for example, when concrete is poured from the chute of a raw concrete car, the anti-scattering wall portion stops the concrete to be scattered. Spattering can be prevented. For this reason, it is not necessary to build a scaffold from the side edge of the floor.
[0008]
Furthermore, in the completed side wall portion, the joint portion between the concrete and the half precast wall member becomes the lower end edge of the scattering prevention wall portion. At this time, since the scattering prevention wall portion is formed thicker than the wall member below it, the joining portion faces the inner surface side of the floor portion. For this reason, compared with the case where a junction part exists in a top end surface like before, invasion of rainwater can be prevented.
According to invention of Claim 2 , the upper surface side of concrete in the side wall part inclines toward the inner side of a floor part. For this reason, since rainwater etc. flow toward the inner side direction of a floor part, the situation where water permeates into the junction part of a wall member and concrete can be avoided.
[0009]
According to invention of Claim 3 , since the scattering prevention wall part of a half precast wall member has protruded to the upper end side rather than the upper end surface when concrete is poured, concrete is ready-mixed from the chute | shoot of a ready-mixed vehicle, for example. When poured into the pouring space, the concrete to be scattered is stopped by the scattering prevention wall portion, so that the concrete can be prevented from scattering. For this reason, when carrying out civil engineering construction work at a high place, there is no need to assemble a scaffolding that protrudes to the side edge of the floor portion for ensuring safety below.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
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”). This 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 on an upper edge portion thereof. When the side wall 3 is formed as will be described later, the scattering prevention wall 2 is higher than the concrete to be placed later so as to jump out to the upper end side of the concrete upper end surface when the concrete 4 is placed. Is a high dimension setting. Further, the thickness A of the scattering prevention wall portion 2 is formed to be thicker than the thickness B of the wall member 1 below the step B, provided with a step 2A. In addition, in the wall member 1, it forms so that the side by which the scattering prevention wall part 2 protrudes may face the inner side of the floor part 5. FIG.
[0011]
Further, an insert nut 6 having a predetermined size (a nut with an internal thread cut on the inner surface) is inserted in advance on the inner surface side (the surface side shown in FIG. 1) of the wall member 1 when the wall member 1 is formed. It has been cured in the state. The insert nut 6 is connected to a fixing member 7 and a separator 8 as will be described later.
As shown in FIG. 2, the wall member 1 is in a state of being raised near the side edge 5 </ b> A of the concrete floor portion 5, and the concrete 4 is placed inside the wall member 1. On the upper surface side 5B (the surface side shown in FIG. 2) of the floor portion 5, a stud bar 9 is protruded at a predetermined position, and a reinforcing bar member 10 and the like are connected to the side wall portion 3 when the side wall portion 3 is formed. The
[0012]
Next, a civil engineering construction method 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 to the upper surface side 5 </ b> B of the floor portion 5 in a raised state. At a predetermined position on the upper surface side 5B, as shown in FIG. 3, a rectangular connection member 11 is paired (in this embodiment, a pair of members is provided near both ends in the length direction of the wall member 1, 3, the wall member 1 is fixed by a total of four connecting members 11.) It is welded and the holes opened in the connecting members 11 are used. The wall member 1 is fixed. That is, on the wall member 1 side, an upper and lower pair of L-shaped fixing members 7 are fixed by bolts 12 using the insert nut 6, and the other side portion of the fixing member 7 is directly Alternatively, the bolt 12 is fixed via the intermediate member 13. A packing 14 made of an elastic member is provided on the upper surface side 5B of the floor portion 5 and the lower end edge portion of the wall member 1 in order to prevent the concrete 4 from being glued. Similarly, a packing 14 made of an elastic member is also provided at a connection portion between the two wall members 1. Further, a reinforcing bar material 10 is disposed along the stud reinforcement 9 between the wall member 1 on the upper surface side 5 </ b> B and the inner mold 15.
[0013]
Next, the inner mold 15 is provided inside the floor 5 (on the right side in FIG. 6, on the opposite side of the wall member 1 in the side wall 3) at a predetermined interval. The inner mold 15 is a mold that forms the inner surface side of the side wall portion 3, and is formed of, for example, a wooden frame. In addition, after the concrete 4 is hardened and the side wall part 3 is formed, it is removed. The height of the inner mold 15 is set to be lower than the height of the wall member 1 and lower than the step 2A position of the scattering prevention wall 2.
[0014]
Thus, when the inner mold 15 is installed, a fresh concrete pouring space 16 is formed between the wall member 1 and the inner mold 15. Further, one end of an iron bar separator 8 is screwed to the wall member 1 using an insert nut 6, and the other end is provided inside the inner mold 15 (left side in FIG. 6). Positioning is performed by the fastening member 17. Further, the screw member 18 is screwed to the fastening member 17 from the outside (right side in FIG. 6) of the inner mold 15 so that the inner mold 15 and the wall member 1 are interposed via the separator 8. It is in a state that maintains a predetermined distance and prevents harassment due to the side pressure of the raw control.
[0015]
Next, as shown in FIG. 6, the uncured concrete 4 is poured into the ready-mixed concrete pouring space 16 through, for example, a chute 19 of a ready-mixed vehicle (not shown). Even when the concrete 4 scatters and tries to get over the upper edge of the wall member 1 during the concrete placing operation, the scatter 4 is prevented because the scatter prevention wall 2 is provided. .
[0016]
Thus, after the concrete 4 is placed in the ready-mixed concrete pouring space 16, the concrete 4 is hardened. In addition, the upper end surface of the concrete 4 is slightly below the step 2A of the scattering prevention wall portion 2 (that is, a gap 20 is provided toward the inside of the floor portion 5). . Further, before the concrete 4 is properly cured and completely cured, the inclined surface 4A is inclined so as to incline toward the inside of the floor portion 5 by leveling the upper surface portion of the concrete 4 with a trowel or placing mortar. Is formed (see FIG. 7).
After the concrete 4 is hardened, the side wall portion 3 in which the wall member 1 and the concrete 4 are integrated is formed by removing the inner mold 15. The gap 20 is filled with a sealing material 21 to prevent intrusion of water or the like from this portion.
In addition, a protruding portion that protrudes toward the inside of the floor portion 5 is formed on a part of the inner mold 15 at an appropriate interval on the wall (side wall portion 3) of the building above the slope in this embodiment. In addition, it is common to provide a retaining wall.
[0017]
As described above, according to the present embodiment, the wall member 1 is raised to the upper surface side 5B of the floor portion 5, the inner mold 15 is provided on the inner side, and the inner mold 15 is interposed between the wall member 1 and the inner mold 15. The concrete 4 is poured into the formed ready-mixed concrete pouring space 16 and is hardened to form the side wall 3. At this time, the concrete wall member 1 is integrated with the concrete 4 to form the side wall portion 3. Thus, since the wall member 1 forms the outer surface side of the side wall part 3, compared with the conventional side wall made of iron plate, there is no rust or corrosion, so that maintenance can be reduced or eliminated at all.
[0018]
Further, the scattering prevention wall portion 2 of the wall member 1 is installed to protrude higher on the upper end side than the inner mold 15 when the concrete 4 is placed. 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 car, 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, when forming the side wall part 3 in a high place, it is not necessary to assemble a scaffold on the outer side of the side edge 5A of the floor part 5.
[0019]
Furthermore, in the completed side wall portion 3, the joint portion between the concrete 4 and the wall member 1 is formed at the lower end edge of the scattering prevention wall portion 2. At this time, since the scattering prevention wall portion 2 is formed to be thicker than the wall member 1 below the step 2A, the joint portion faces the inner surface side of the floor portion 5. For this reason, invasion of rainwater or the like can be prevented as compared with the conventional case where the joint portion is on the top end surface.
[0020]
In addition, an inclined surface 4 </ b> A that is inclined toward the inner side of the floor portion 5 is formed on the upper surface side of the concrete 4 in the side wall portion 3. For this reason, since rainwater etc. flows toward the inner side of the floor portion 5, it is possible to avoid a situation where water enters the joint portion between the wall member 1 and the concrete 4.
[0021]
In addition, as a structure which raises the wall member 1 on the upper surface of the floor part 5, it is not restricted to said embodiment, For example, you may make it show in FIG. In this example, a fixing member 30 having an L-shaped cross section and long in the vertical direction is used. The wall member 1 is provided with an insert bolt 31, and the fixing member 30 is connected using a bolt hole 30 </ b> A provided in the fixing member 30.
The technical scope of the present invention is not limited by the above-described embodiment, and can be suitably implemented, for example, for high-altitude work such as a retaining wall on a slope, an elevated road or a wall rail of a bridge. .
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a half precast wall member in the present embodiment. FIG. 2 is a partial perspective view showing an upper surface side of a floor portion. FIG. FIG. 4 is a partially enlarged plan view of a state in which a half precast wall member is raised at the upper surface side end portion of the floor portion. FIG. 5 is a half view at the upper surface side end portion of the floor portion. Partially enlarged front view of the precast wall member in a raised state. [Fig. 6] A side cross section showing a state in which an inner mold is attached to the inside of the floor and concrete is placed in a ready-mixed concrete pouring space. FIG. 7 is a side cross-sectional view when a side wall portion is completed by integrating a half precast wall member and concrete. FIG. 8 In another embodiment, a half precast wall member is attached to an upper surface side end portion of a floor portion. Launch FIG. 9 is a side cross-sectional view of the building in a state. FIG. 9 is a general view showing a building fence on a slope on one side of a road in the conventional example. FIG. Cross-sectional side view showing the concrete placing operation when forming [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Half precast wall member 2 ... Spattering prevention wall part 2A ... Step 3 ... Side wall part 4 ... Concrete 4A ... Inclined surface 5 ... Floor part 15 ... Inside formwork 16 ... Ready-mixed concrete pouring space

Claims (3)

It is a half precast wall member used in civil engineering construction work that forms a side wall at the upper surface side end of the floor at a high place,
In a state of being raised at the upper surface side end portion of the floor portion , concrete is placed inside the half precast wall member that is installed and fixed at the upper surface side end portion of the floor portion , and is cured and integrated. The side wall is formed ,
The upper part of the half precast wall member is provided with a scattering prevention wall portion so as to jump out to the upper end side from the upper end surface when the concrete is placed,
The thickness of the scattering prevention wall portion is formed to be thicker than the half precast wall member below the thickness, and the scattering prevention wall portion protrudes from the half precast wall member. A half precast wall member characterized in that the installed side faces the inside of the floor portion . The said side wall part formed by integrating the half precast wall member of Claim 1 and the said concrete WHEREIN: The upper surface side of the said concrete is inclined toward the inner side of the said floor part, It is characterized by the above-mentioned. Assembly structure of half precast wall member and concrete. In the state which raised the half precast wall member according to claim 1 to the upper surface side end part of a floor part, an inner formwork is provided inside the floor part at a predetermined interval, and the wall member and the inner side are provided. The concrete and the half are poured into a ready-mixed concrete pouring space formed between the mold and the concrete by pouring the concrete so that the upper end surface is slightly below the step of the anti-scattering wall and curing the concrete. A civil engineering construction method using a half precast wall member, wherein the side wall portion is formed by integrating the precast wall member.

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