JPH0455522A - Foundation construction method for temporary column - Google Patents

Abstract

PURPOSE:To enable rapid construction by stacking disk-shaped concrete molded items having a protrusion in the center of the upper surface and a recess in the center of the underside thereof on one another from the bottom of a vertical shaft to fix a temporary column by means of a fixing means on the upper surface of the uppermost disk. CONSTITUTION:A disk-shaped concrete molded item 1 having a protrusion la and a recess 1b respectively on the upper surface and underside thereof is lifted with its protrusion directed upwardly to place it on the bottom of a vertical shaft 2. And then molded items 1 of identical shape are placed on the item 1 one by one to form a column-like foundation body 4, after which a temporary column 3 is inserted into a through hole 1c of item 1 to erect it. Further, a fixing member 5 is provided around the outer periphery of the column 3, so that bolts 6 are inserted into the tapped holes of the member 5 to fix the column 3.

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a foundation construction method for temporary columns.

<Conventional technology> As a conventional foundation construction method for temporary columns, there is a construction method in which, for example, a rooting material is attached to the base of the temporary column and erected, but the purpose of the rooting material is to increase the pull-out resistance of the temporary column. It ends up being a mere means of reinforcement. In addition, in order to ensure the effectiveness, increasing the depth of the roots of the temporary pillars and increasing the weight and width of the foundation underground is the most effective way to ensure a large resistance moment. If the thickness exceeds 2m (for a temporary pillar with a height of 15m above the ground), sufficient foundation work cannot be expected unless a special excavation machine is used, so in many cases reinforcement is placed at the base of the temporary pillar. Because the method used is to construct the foundation by pouring concrete deep into the foundation hole, even with the method of pouring concrete, a considerable period of time is required for reinforcing and curing of the concrete, and in some cases Not only does it require the transportation of heavy machinery, it takes a lot of man-hours, and it is difficult to construct it in narrow areas or mountainous areas where there are a lot of people's houses and facilities.Also, when the temporary pillars are removed, the concrete used as the foundation must be crushed when backfilling. Many problems remain, such as the need to transport the materials.

<Problems to be Solved by the Invention> The present invention has been made in order to solve the above-mentioned conventional problems as much as possible. The purpose of the present invention is to propose a new foundation construction method for temporary columns that can be constructed even in the case of temporary columns and that can provide sufficient pull-out resistance after inserting the temporary columns into the foundation.

Means for Solving the Problems> In order to achieve the above problems, in the present invention, a pit corresponding to the volume of the foundation to be buried is excavated, and a hole with an appropriate thickness is drilled in order to construct the foundation. A disc-shaped concrete molded body having a central part of the upper surface bulged to form a plateau-like convex part, and a concave part of the same shape corresponding to the shape of the convex part formed in the central part of the bottom side. At the same time, a through hole for erecting a temporary pillar is drilled in the center of the convex part, and the required number of single pieces are stacked in the vertical hole in order to form a cylindrical base. A means for solving this problem is a foundation construction method for temporary columns that are fixed by fixing means on the top surface and buried together with the foundation.

<Example> 1 is a disc-shaped concrete molded body having an appropriate thickness, and the central part of the upper surface is bulged to form a plateau-like convex part 1a,
A concave portion 1b having the same shape as the plateau-like convex portion 1a is formed at the center of the bottom surface thereof, and a through hole 1c for erecting the temporary pillar 3 is bored in the center of the convex portion 1a.

The gist of the present invention is a method of preparing a required number of molded bodies 1 and polymerizing them sequentially from the bottom of the pit 2 to obtain a cylindrical temporary column 30 and a base body 4. The process of this method is shown in Fig. 3. Explain according to the following.

Step (a): A pit hole 2 corresponding to the volume of the foundation body 4 to be buried is excavated. The base 2a of the shaft 2 is floored to stabilize the base body 4 (see FIG. 3A).

Step (b): Prepare the required number of disc-shaped concrete molded bodies 1 to constitute the base body 4, suspend the disc-shaped concrete molded bodies 1' with the trapezoidal convex #1a upward, and Install it on the base 2 & of 2 (see Figure 3, opening).

Step (c): Molded bodies 1# of the same shape are successively suspended on the disk-shaped concrete formed body 1' and polymerized to form a cylindrical base body 4.

The base body 4 obtained in this way is tentatively In order to erect installation pillar 3, a transparent hole for erecting a temporary pillar is installed. The hole 1c is in the depth direction as shown in Figure 3. Formed continuously.

Step (d): After inserting the temporary pillar 3 into the through hole 1c for erection of the temporary pillar 3 and erecting it, fix the temporary pillar 3 by the fixing means on the top surface of the plateau-like convex part 1a. do.

After that, it will be buried together with the above foundation and temporarily The equipment will be installed (see Figure 3, 2).

In the manner described above, the foundation for the temporary pillars 30 is completed using the construction method of the present invention.

In this embodiment, as the fixing means, as shown in FIG. Insert bolt 6 using the screw hole provided in the corresponding position.
Although the fixing means is not limited to the above, any means may be used as long as the temporary pillar 3 and the base body 4 are fixed so as to be integrated with each other.

<Effects of the Invention> According to the foundation construction method for temporary pillars according to the present invention, the central part of the upper surface of the disc-shaped concrete molded body is bulged to form a plateau-like convex part, and the central part of the bottom side of the convex part is bulged. Since the concave part of the same shape corresponding to the shape of the convex part is formed, the disc-shaped concrete molded bodies can be stacked one after another accurately without any gaps, and the foundation can be quickly assembled by inserting the temporary pillars into the through holes for erection. Since it is easy to assemble and dismantle, it is suitable as a foundation construction method for temporary pillars in narrow areas where houses and facilities are crowded, or at construction sites and event halls.

In addition, since the temporary pillar is fixed by the fixing means on the top surface of the terrace-like convex part, it has sufficient pull-out resistance against the overturning force acting on the temporary pillar, and has a high supporting force. can get.

Furthermore, it has a simple structure, is easy to implement, and is suitable for mass production because it consists of a disc-shaped molded body, so it can be used to erect various types of columns, and it can be used repeatedly. It is.

[Brief explanation of drawings]

Figure 1 is an exploded perspective view of essential parts showing one embodiment of the foundation construction method;
FIG. 2 is a sectional view showing an example of a disc-shaped concrete molded body employed in an embodiment of the present invention, and FIG. 3 is an explanatory view showing an example of construction using the foundation construction method. 1.1'1''----1 molded body la--6 part lb--H part lc--1 hole 2--1 vertical hole 3-----1 temporary pillar 4---- -One base body 5---One identification member 6---Bolt

Claims (1)

[Claims] (1) A foundation construction method for temporary columns in which, when installing temporary columns, a pit is dug in order to bury the foundation in a predetermined position and the foundation is installed in the pit. A pit corresponding to the area will be excavated and the floor will be laid. B. Prepare a disc-shaped concrete molding to form the foundation. The concrete molded body having an appropriate thickness has a central portion of the upper surface bulged to form a plateau-like convex portion, and a concave portion of the same shape corresponding to the shape of the convex portion is formed at the central portion of the bottom side. A through hole for erecting a temporary pillar is bored in the center of the convex portion. C. As described above, the required number of disc-shaped concrete molded bodies are sequentially polymerized from the bottom of the pit to form a base body. D. The temporary pillar is fixed by the fixing means on the uppermost surface of the terrace-like convex portion, and is installed by being buried together with the foundation. A foundation construction method for temporary columns obtained through each of the steps A to D above.