JPS6120124Y2 - - Google Patents

Description

[Detailed explanation of the idea] This invention relates to improvements in the basic structure of flat-bottomed containers.

Conventionally, flat-bottom containers such as tanks are placed on top of a concrete foundation by pouring grout to make it flat. In this case, it is important that the top surface of the foundation is completely flat, has so-called flatness, and has a smooth finish.

For this reason, in the past, the foundation bolts were positioned using templates, supported by support forms, etc., then fresh concrete was poured, and after hardening, the top surface of the concrete was chipped. Place the washer called a patch car at the required location, for example, at a position where the center and the circumference are divided into 8 to 10 equal parts, check the horizontal of the patch car, check the flatness of the patch car, and then pour the grout using the top surface of the patch car as a reference. It had a flat finish. Therefore, since the bottom plate of the flat-bottom container also rests on the top surface of the pack car, the container must be installed with sufficient accuracy, for example, about ±3 mm. The foundation constructed in this way becomes a foundation structure in which grout is placed on the foundation concrete in a so-called tsura-ichi manner, matching the top surface of the pack cars placed at the required locations so that the top surfaces are on the same plane. ing.

In this case, as the diameter of the container increases, the number of holes increases, and it is not an easy task to achieve flatness within tolerance over a wide range, and the required flatness cannot be obtained after grouting. In such cases, it may be necessary to perform correction work such as scraping the surface of the high part with a grinder or the like. In addition, in the case of a sloped foundation with a sloped top surface, the poured grout tends to move downward until it hardens, so-called grout sagging, making it difficult to obtain a flat surface with the required slope angle.

The purpose of this invention is to provide a basic structure for a flat-bottomed container that solves the above-mentioned problems.
A flat bottom in which a reference metal frame with foundation bolts attached to its outer peripheral edge is placed on the foundation concrete, and the reference metal frame is embedded in grout poured with the upper surface as the reference surface. Concerning the basic structure of the container.

Next, embodiments shown in the accompanying drawings will be described.

The standard metal frame 1 used in the foundation structure of this invention is made by assembling and fixing steel members such as channel steel 2 or angle steel in a lattice pattern so that their upper and lower surfaces are parallel to each other, and bolt holes 3 are drilled at required points on the outer edge so that the foundation bolts of the flat-bottomed container can be inserted through them and fixed with nuts.

First, assemble the back of the building, set up the formwork 4 for pouring foundation concrete on top of it, assemble the supporting formwork (not shown) on the backbone, and place the above-mentioned standard metal frame 1 horizontally on top of it. Alternatively, install it at the required inclination angle and fix it to the supporting formwork by an appropriate method. Insert foundation bolt 5 into foundation bolt hole 3 of reference metal frame 1.
through the shape steel 2 of the standard metal frame so that the anchor part (not shown) is sufficiently buried in the foundation concrete 6.
Fix it with nut 8. At this point, the flatness or inclination of the reference metal frame and the level of the foundation bolt heads shall be adjusted with precision. In this manner, the foundation concrete 6 is poured into the formwork 4 up to about the lower surface A-A of the metal frame, for example. Once it has hardened, chip the surface to make it fit better with the grout and pour the grout up to the top of the reference frame. If the reference metal frame is made strong by welding shaped steel, the flatness and horizontality of the entire surface of the reference metal frame can be accurately determined by leveling the center of the metal frame and about 5 points at both ends of the cross passing through the center. I'm going to go out. When the foundation concrete 6 is poured to below the bottom surface A-A of the reference metal frame, if the level of the reference metal frame goes out of order during pouring, insert and remove washers under these five metal frames. It can be leveled. Alternatively, the levelness or flatness can be adjusted by using a foundation bolt set perpendicular to the foundation surface and turning the nut to move the reference metal frame up and down.

In this way, pour the grout into the formwork and align the top surface of the grout layer 7 with reference to the top surface B-B of the metal frame 1 within each grid, not only within each grid but also as a whole. A foundation with highly accurate flatness or levelness (or slope) can be obtained.

In this way, in the basic structure of the present invention, a reference metal frame made by combining shaped steel sections so that their upper and lower surfaces are parallel is placed on the foundation concrete, and the upper surface of the reference metal frame is used as the reference surface, and the reference metal frame is placed on top of the foundation concrete. Since the structure is such that the grout is poured and the reference metal frame is embedded, if the flatness of the top surface of the installed reference metal frame is ensured, the grout can be flattened to follow the top surface of the reference metal frame. The flatness can be made very precise. Therefore, the flatness and horizontality of the top surface of the reference metal frame are measured at the center of the metal frame and at both ends of the cross passing through the center.
For example, the washer can be taken out easily by taking it in and taking it out and moving it up and down.

In the case of a sloped foundation, each grid can prevent the grout from moving or flowing downward, and the embedded reference frame also has the effect of supporting the container as a strength member. In addition, since the foundation bolts can be fixed with nuts to the flanges of the steel sections that make up the reference metal frame, there is no risk of the foundation bolts moving during foundation concrete pouring, and it is easy to make the foundation bolts perpendicular to the top surface of the foundation. The above effect is extremely large.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of the reference metal frame used in the basic structure of the present invention, Fig. 2 is a plan view showing the state in which the reference metal frame is installed, and Fig. 3 is the main part of the basic structure of the present invention. FIG. 1...Reference metal frame, 2...Shaped steel, 3...Foundation bolt holes, 4...Formwork for foundation concrete pouring, 5...
...Foundation bolt, 6...Foundation concrete, 7...
Grout layer, B-B... Grout top surface, A-A...
...Position of the bottom surface of the reference metal frame.

Claims (1)

[Scope of utility model registration request] Shaped steel is assembled in a lattice shape so that the top and bottom surfaces are parallel, and a reference metal frame with foundation bolts attached to the outer peripheral edge is placed on the foundation concrete. A basic structure of a flat-bottom container in which the reference metal frame is embedded in grout.