JPH1088646A - Method of installation of concrete structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of installation, by which level control works which have been needed at the time of the installation of a concrete structure are unnecessitated while safety can also be improved. SOLUTION: L-shaped sectional angle materials made of a metal are used as height adjusting members 30 when the concrete structure 20 with a flat base 21 is mounted on a concrete foundation 10 with a flat surface in the method of installation, and the method of installation consists of a process, in which the other flange sections 32 are buried into the foundation in a form that one flange sections 31 of the angle materials are exposed onto the surface 13 of the foundation 10 and one flange sections 31 are positioned in specified height, and a process, in which bed mortar 15 is executed onto the surface 13 of the foundation 10 in specified thickness for unifying the foundation 10 and the concrete structure 20. A process, in which the concrete structure 20 is installed, is contained after the execution of the bed mortar 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a flat foundation,
The present invention relates to a technique for installing a concrete structure such as a box culvert.

[0002]

2. Description of the Related Art In the construction of concrete structures,
2. Description of the Related Art In place of cast-in-place concrete, a method of using a precast concrete member manufactured in advance in a factory or the like has been widely used in the past. One of them is the box culvert method. In this method, for example, a large number of square tubular precast concrete members (box culverts) are prepared and installed at the site while being connected to each other in the axial direction.

[0003] This box culvert method, for example,
It is often used when constructing concrete structures such as water and sewage systems, underground common ditches, and underground water storage tanks.

[0004] When the above-mentioned concrete structure is constructed by such a construction method, it is necessary to take measures to increase the installation accuracy of the box culvert itself. The reason for this is that if the installation accuracy is poor, it takes time and effort to align and center the box culverts when they are connected to each other, resulting in a significant decrease in work efficiency. In particular, since the box culvert itself is usually heavy, it is difficult to adjust the installation position later.

[0005] In this respect, conventionally, the foundation for installing the box culvert is made of concrete and its surface is made flat, and the bottom surface of the box culvert is also made flat. The flat bars for height adjustment are arranged in a plurality of rows at regular intervals on the surface of the device, and then installed.

[0006]

However, such a conventional installation method has problems to be solved in the following points. First, it takes time to manage the level at the time of box culvert installation. In other words, the flat bar placed on the foundation may be displaced when the box culvert is installed, or the overlapping state of each flat bar that has been stacked for adjusting the height may be broken. Correction work is required each time, so that workability and work efficiency are significantly reduced.

Secondly, when the flat bar placed on the foundation is displaced or collapsed as described above, the correction work must be performed while the box culvert is hung by a crane or the like. There is a danger of workers being caught in limbs. Therefore, improvements in this safety are also needed.

The present invention has been made in consideration of the above points, and eliminates the need for level control work required when installing a concrete structure, thereby improving work efficiency, and also improving safety. It is an object of the present invention to provide a technology that can be improved.

[0009]

According to the present invention, there is provided a concrete foundation having a flat surface.
When installing a concrete structure with a flat bottom,
A method of adjusting the installation accuracy by arranging at least two rows of plate-shaped adjusting members on the foundation at intervals, wherein a metal angle member having an L-shaped cross section is used as the adjusting member. A step of embedding the other flange part in the foundation in a form in which one flange part is exposed on the surface of the foundation and positioning one flange part at a predetermined height, and on the surface of the foundation, The method includes a step of applying a laying mortar to a predetermined thickness for integrating the foundation and the concrete structure, and a step of installing the concrete structure after the laying mortar is constructed. Here, the adjustment member can be positioned at a predetermined height by a support material embedded in the foundation in advance. Further, the concrete structure is a box culvert having a structure connected in the axial direction thereof, and the adjusting member extends along the axial direction of the box culvert, and is located near both side surfaces of the box culvert. Can be arranged.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to FIGS. FIG.
FIG. 2 is a cross-sectional view showing an example in which a concrete structure installation method according to the present invention is applied to a box culvert, FIG. 2 is a perspective view showing the construction procedure, and FIG. 3 is another embodiment similar to FIG. It is sectional drawing.

In these figures, reference numeral 10 denotes a concrete foundation, on which a box culvert 20 is mounted on a surface 11 of the foundation. The foundation 10 is constructed by casting cast-in-place concrete 12 from above the laying stones 11 and taking care that the surface 13 is formed flat.

Before the box culvert 20 is installed on the surface 13 of the foundation 10, an adjusting member 30 is arranged. In this embodiment, an angle member is used as the adjusting member 30. The adjusting member 30 made of the angle material includes one flange portion 31 and the other flange portion 32.
Are so-called commercially-available steel materials that cross each other at an angle of 90 degrees (in an L-shape).

In this embodiment, the surface (outer surface) of one of the flange portions 31 of the adjusting member 30 is
The other flange portion 32 is disposed so as to be buried in the foundation 10 so as to extend horizontally on the surface 13 of the base member 10. At that time, the lower surface (inner surface) of the one flange portion 31 is positioned at such a height as to be in contact with the surface 13 of the foundation 10.

As shown in FIG. 1, the adjusting members 30 are arranged in two rows at an interval on the left and right, and extend in the axial direction of the box culvert 20. The left and right adjustment members 30, 30
Are set to be equal to or more than の of the width of the bottom surface 21 of the box culvert 20 in the width direction (lateral direction). Thereby, consideration is given so that the box culvert 20 can be installed horizontally on the left and right adjusting members 30 in a stable state.

Various methods are conceivable as a method of positioning the adjusting member 30 with respect to the foundation 10. For example, only the adjusting member 30 can be embedded and set before the cast-in-place concrete 12 is hardened. However, as a simpler and more reliable method, the support member 14 is set before the cast-in-place concrete 12 is cast, and the adjusting member 30 is fixed to the support member 14 by a method such as welding, bolting or bundling. By doing so, it can be positioned at the target height.

As the support member 14, in addition to the same angle member as the adjusting member 30, a channel steel, a lightweight H steel, a reinforcing bar, or the like can be used. A plurality of the support members 14 are provided at appropriate intervals in the length direction of the adjustment member 30. After the cast-in-place concrete 12 is hardened, the concrete 12, the adjusting member 30, and the support member 14 form an integral substructure.

When such an installation method is carried out, when the foundation 10 is constructed, the cast-in-place concrete 12 is constructed with the support member 14 and the adjusting member 30 being set.
The surface is leveled. The height of the surface 13 of the base 10 is set to reach the lower surface of the one flange portion 31 of the adjusting member 30, and the mortar 15 is spread thereon. Regarding the thickness of the spread mortar 15, one of the flange portions 31
In this case, one of the flange portions 31
About 2 cm, which is the same thickness as, or slightly thicker than that.

Before the laying mortar 15 hardens, the box culvert 20 carried near the installation site is lifted and installed at a target position on the foundation 10. This installation state is shown in FIG. 1, and as shown in FIG. 1, the bottom surface 21 of the box culvert 20 comes into contact with the left and right adjustment members 30 and 30 and is horizontally and firmly installed. In this state, the mortar 15 is hardened, so that the bottom 21 of the box culvert 20 and the surface 13 of the foundation 10 are integrated.

The box culvert 20 is installed so as to rest on the adjusting member 30.
0, the adjustment member 30
Does not shift. Moreover, the adjusting member 3
Since 0 is set at the target height position, the installation accuracy of the box culvert can be sufficiently increased. As a result, level adjustment management becomes unnecessary, and
Work efficiency can be improved.

In addition, since the level adjustment work is not required in this way, the cause of a disaster such as pinching of a limb can be basically eliminated. The adjusting member 30 and the support member 14
Also functions as a steel material for reinforcing the concrete of the foundation 10.

In another embodiment, shown in FIG.
The left and right adjustment members 30, 30 positioned above are set so as to be located near the left and right side surfaces 22, 22 of the box culvert 20.

By doing so, the adjusting member 30 can have a centering function of the box culvert 20 in addition to its original level adjusting function.
That is, when the box culvert 20 is installed, the box culverts 20 to be connected to each other in the axial direction only by installing the side surface 22 along the edge of the adjustment member 30.
The axes between one another can be exactly matched. Thereby, the workability and the installation accuracy can be further improved.

In the embodiment, the box culvert has been described as an example. However, it is needless to say that the present invention can be applied to other concrete structures. In addition, the adjusting members 30 are arranged in two lines, one line on each side, but it is also possible to arrange two or more lines as needed.

[0024]

As described above, according to the present invention, when a concrete structure having a flat bottom is installed on a concrete foundation having a flat surface, a metal angle member having an L-shaped cross section is used as a height adjusting member. With the step of embedding the other flange portion in the foundation in a form in which one flange portion of the angle material is exposed on the surface of the foundation and positioning one flange portion at a predetermined height, On the surface of the foundation,
The method includes a step of applying a laying mortar to a predetermined thickness for integrating the foundation and the concrete structure, and a step of installing the concrete structure after construction of the laying mortar. This eliminates the need for level management work required at the time of installation, improves work efficiency, and also improves safety.

Also, the positioning of the adjusting member can be easily and accurately set by positioning the adjusting member at a predetermined height by the support member embedded in the base in advance. Further, it can have a function as a concrete reinforcing member.

Further, the concrete structure is a box culvert having a structure connected in the axial direction of the box culvert, and the adjusting members extend along the axial direction of the box culvert, and are located near both side surfaces of the box culvert. With this arrangement, the adjusting member can have a centering function in addition to the level adjusting function.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a construction procedure according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Foundation 11 Split stone 12 Cast-in-place concrete 13 Surface 14 Support material 15 Spread mortar 20 Box culvert 21 Bottom surface 22 Side surface 30 Adjusting member 31 One flange 32 The other flange

Claims (3)

[Claims] When a concrete structure having a flat bottom is installed on a concrete foundation having a flat surface, at least two plate-like adjusting members are spaced apart on the foundation.
An installation method for a concrete structure, in which installation accuracy is adjusted by arranging in a row, wherein a metal angle member having an L-shaped cross section is used as the adjustment member, and one flange portion of the angle member is used as the base member. A step of burying the other flange portion in the foundation in a form exposed on the surface and positioning the one flange portion at a predetermined height; and, on the surface of the foundation, a foundation and a concrete structure. A method for installing a concrete structure, comprising: a step of applying a spread mortar to a predetermined thickness for achieving integration of the concrete structure; and a step of installing the concrete structure after construction of the spread mortar. 2. The concrete structure installation method according to claim 1, wherein the adjusting member is positioned at the predetermined height by a support member embedded in the foundation in advance. 3. The box culvert having a structure in which the concrete structure is connected in the axial direction thereof, wherein the adjusting member extends along the axial direction of the box culvert, and is close to both side surfaces of the box culvert. The concrete structure installation method according to claim 1 or 2, wherein the concrete structure is disposed so as to be positioned at each of the concrete structures.