JPH078588Y2 - Assembled underground tank foundation - Google Patents

Description

[Detailed Description of Device] a. Purpose of the Invention (1) Field of Industrial Application This invention relates to an underground tank foundation for a gas station, and more particularly to a precast type, that is, an underground tank foundation constructed by assembling ready-made members.

(2) Conventional technology As an underground tank foundation of this kind, as shown in Fig. 11,
There is one in which the whole of the tank foundation c consisting of the foundation base a and the foundation table b is precast, and as shown in the figure, it is placed at the bottom of the hole f dug in the ground e with the tank d being placed. It is installed on the basic concrete g through the crane h.

However, in the prior art, since the entire tank foundation c is precast, the weight is large,
In addition to the difficulty in transportation, the shape becomes complicated at the time of manufacturing, and there are great difficulties in manufacturing.

This tendency becomes larger as the tank foundation c becomes larger, and this conventional technique cannot deal with a scale in which the tanks d are mounted in two or more rows.

(3) Problems to be Solved by the Invention The present invention has been made in view of the above circumstances, and provides an assembly-type underground tank foundation capable of improving the efficiency of the assembling work and coping with an increase in the size of the foundation. With the goal.

B. Configuration of the Invention (1) Means for Solving Problems The prefabricated tank underground foundation of the present invention adopts the following configuration (technical means) in order to achieve the above object. That is, in a tank foundation in which one or more rows of tanks are arranged, a rectangular flat base base 1 is provided with a long groove 10a in the width direction and short grooves 10b on both sides of the long groove 10a at regular intervals. A plurality of engaging grooves 10 are formed in parallel with each other at predetermined intervals in the longitudinal direction, and are fitted in the engaging groove 10 of the base 1 and the long groove and the short groove on the lower surface thereof. Round long protrusion 17
The base 2 on which the engaging projections 17 composed of a and the short projections 17b are projected is fitted, and the base 1 and the base 2 are
It is characterized in that it is fixed by a joint plate 28 fixed to the base 1 and attached to the base 2.

(2) Action The base 1 and the base 2 are factory-produced as precast materials and transported to the assembly site.

When constructing an underground tank foundation, the foundation base 1 on the ground surface
Is installed horizontally, and the engaging projection 17 of the base 2 is fitted into the engaging groove 10 on the base 1. Since the engaging grooves 10 are formed by being accurately aligned, the engagement of the engaging protrusions 17 allows the base 2 to be accurately and uniquely installed on the base 1 without any displacement or blurring. . Then, the base 1 and the base 2 are fixed to each other by the joining plate 28.

In this construction work, since the base 1 and the base 2 are downsized, the work is easy, and the assembly operation is the main operation, so the work is performed efficiently.

(3) Embodiment An embodiment of the prefabricated underground tank foundation of the present invention will be described with reference to the drawings.

1 to 6 show a prefabricated underground tank foundation (hereinafter simply referred to as "tank foundation") of an embodiment (first embodiment).

FIG. 1 shows the entire plane of the present tank foundation H, and FIG. 2 shows its front surface.

As shown in the figure, this tank foundation H is parallel to each other with one rectangular base (longitudinal direction l, width direction b) of one basic base 1 and a predetermined interval in the longitudinal direction 1 on the basic base 1. It is composed of a plurality of bases 2 arranged in a shape, and these bases 1 and 2 are fixedly provided with an engaging structure and a joining structure shown in FIG.

FIG. 3 shows the plan view of the base 1.

That is, the base base 1 has a skeleton body made of reinforced concrete, has a rectangular plane, has a predetermined thickness, and has a predetermined interval in the longitudinal direction in parallel with the engaging groove 10.
Are recessed over a plurality (3 in this embodiment). The engagement groove 10 is composed of a first groove or a long groove 10a formed at the center and a second groove or a short groove 10b formed at both ends, and the long groove 10a and the short groove 10b are flat with a constant interval. Separated by section. The engagement groove 10 has the same depth in both the long groove 10a and the short groove 10b. Recesses (11) for joining are arranged symmetrically on the flat part with the center line of the engaging groove (10) as the axis of symmetry. The depth of the joint recess 11 is made relatively shallow.

Round base recesses 12 are provided at the four corners of the base base 1, and joint reinforcing bars 13 embedded in the skeleton are projected into the base recess 1.

FIG. 4 shows the front shape of the base 2.

The base 2 is made of reinforced concrete and is formed into a substantially rectangular wall shape, the length of which is equal to the width b of the base 1 and the thickness of which is the engaging groove formed in the base 1. Equal to a width of 10. A recess on the top surface where the tank T is placed
15 are formed.

On the lower surface, an engaging projection 17 is formed which projects downward from the reference surface 16 and corresponds to the engaging groove 10 of the base 1. That is, the first protrusion or long protrusion 17 formed in the center portion
a corresponds to the first groove or the long groove 10a of the base 1 and is formed at both ends, and the second protrusions or the short protrusions 17b correspond to the second groove or the short groove 10b of the base 1. Also,
These heights are equal to the depth of the engaging groove 10. The long protrusions 17a correspond to the recesses 15 in the upper and lower phases, compensate for the cross-sectional defects of the recesses 15, and contribute to the stiffening of the base 2. The distance between the long protrusions 17a and the short protrusions 17b on the lower reference surface 16 corresponds to the flat portion of the base 1. A joint recess 18 is formed on the side surface of the base 2 facing the reference surface 16.

Reference numeral 19 denotes a mounting bolt embedded in the base 2 and protrudingly provided on the upper surface thereof. The mounting bolt 19 is placed on the base 2 and is fixed to the tank T.

5 and 6 show the detailed structure of the joint structure. FIG. 5 is an enlarged view of part A of FIG. 2, in which mortar is not filled, and FIG. 6 shows a cross section taken along the line BB of FIG. 5, showing a state in which mortar is filled.

That is, in the joint recess 11 of the base 1, the embedded plate 20 is fixed to the bottom of the embedded base 20 by exposing the surface of the embedded plate 20 through the anchor muscles 21 protruding into the body of the base 1. The members 22 are fixed side by side. Reference numeral 20a is an opening for inserting a bolt that communicates with the screw hole 22a of the nut member 22.

The joint recess 18 of the base 2 has an embedded plate at the back.
24 is fixed by exposing the surface thereof via anchor lines 25, and a nut member 26 is fixed to the embedding plate 24 side by side in the width direction. 24a is a screw hole 26a of the nut member 26.
It is an opening for inserting a bolt that communicates with.

When the base 2 is installed on the base 1 in a fixed position, the embedding plates 20 and 24 of these joint recesses 11 and 18 are in an orthogonal state.

Reference numeral 28 is an L-shaped joining plate attached to these embedded plates 20 and 24. The joining plate 28 has elongated bolt insertion holes 29 corresponding to the openings 20a and 24a.

The joining bolt 30 is screwed into the screw holes 22a and 26a of the nut members 22 and 26 through the bolt insertion holes 29 of the joining plate 28 and the openings 20a and 24a of the embedding plates 20 and 24, and the foundation is provided through the joining plate 28. The base 1 and the base 2 are firmly joined.

32 is a mortar filled in the joint recesses 11 and 18.

The procedure for assembling the tank foundation H of this embodiment is as follows.

(1) Basic concrete is placed at the bottom of the hole excavated in the ground, the upper surface of the basic concrete is leveled horizontally, and then the basic base 1 of the present tank foundation H is installed.

(2) Engaging projections 17 of the base 2 in the engaging grooves 10 of the base 1
Fit in. That is, the long protrusion 17a of the engagement protrusion 17 of the base 2 is fitted in the long groove 10a of the engagement groove 10, and the short protrusion 17b is fitted in the short groove 10b.

(3) Connecting recesses of the base 1 and the base 2
The joint plate 28 is brought into contact with the bolts 11, 18 so that the bolt insertion hole 29 and the openings 20a, 24a of the embedding plates 20, 24 are aligned with each other, and the joint bolt 30 is screwed and fixed.

(4) The joint recesses 11 and 18 are filled with mortar 32.

In this way, the assembly of the tank foundation H is completed,
After this, the tank T is placed in the recess 15 of the foundation table 2 and fixed through the mounting bolts 19, and the pillars are erected on the foundation base 1, on which the floor concrete is placed. To be done.

(Second Embodiment) As shown by a chain line 35 in FIG. 3, a half-divided base base (this is referred to as an "A-type base base") obtained by dividing the base base 1 into two in the longitudinal center is integrated with a joint 36. And

7 and 8 show the detailed structure of the joint 36. FIG. 7 shows its planar structure, and FIG. 8 shows its sectional structure.

A concave portion 38 is provided in a portion where the A type base base 1A is opposed to each other, and an embedded plate 39 is provided at the bottom of the concave portion 38 with an anchor line.
The surface is exposed through 40 and fixed. An opening 39a for inserting a bolt is formed side by side in the embedding plate 39, and a joining bolt 41 is inserted into the embedding plate 3 through the opening 39a.
9 is welded and fixed.

Reference numeral 42 denotes a joining plate, which is arranged so as to straddle between the recesses 38 of the base 1A, the bolt insertion hole 42a thereof being aligned with the opening 39a of the embedding plate 39, and the joining bolt 41 protruding from the bolt insertion hole 42a. The nut 43 is screwed into the threaded portion of the.

Reference numeral 44 is a mortar filled in the recess 38.

According to this embodiment, the base 1 is divided in half, the weight of the base 1 is reduced, and the carrying operation is further facilitated.

(Third Embodiment) FIGS. 9 and 10 show still another embodiment (third embodiment) of the present invention. In the figure, the same reference numerals are given to the same members as those in the first and second embodiments.

In this embodiment, the base base 1 corresponds to a tank base in which two or more rows of tanks are arranged, and the base base 1 is further downsized and standardized.

The basic base 1 of this embodiment comprises an A type basic base 1A, a B type basic base 1B, a C type basic base 1C, and a D type basic base 1D (these are collectively referred to as split type basic bases).

Since the A type base base 1A has been described in the second embodiment, detailed description thereof will be omitted, but the length of the long groove 10c of the engaging groove is equal to 1/2 of the long groove 10a.

The B type base base 1B has a long groove 10c formed in the width direction,
The long groove 10c in the mold base 1B also has a half length of the long groove 10a, and is continuous with the long groove 10c of the A-shaped base 1A.
To form.

The C-shaped base base 1c has a short groove 10b and a recess 11 with the longitudinal center line as the axis of symmetry, and the C-shaped base base 1C extends from the outer edge of the short groove 10b.
The distance to the outer edge of is equal to the length of the reference surface 16 of the base 2.

The D-shaped base 1D has a long groove 10a in the width direction.

Of these basic bases, the connecting rebars 13 are arranged in A type and C type.

Then, these base bases 1A, 1B, 1C, 1D are firmly joined to each other by the joining portion 36 shown in the second embodiment.

In addition, in the figure, 46 is a precast floor slab, and 47 is a column member interposed between the floor slab 46 and the foundation base 1 of the tank foundation. The column member 47 has a cylindrical shape, and normally a fume tube is used, and connecting rebars 48 and 49 are provided so as to project from the lower part and the upper part thereof.

The illustrated embodiment shows an arrangement of three or more rows. The arrangement of two rows is A
It is made by a combination of type + type B + type C + type B + type A. A type + B type + C type + D for arrangement of 3 or more rows
Type + (C type + D type) + ... + C type + B type + A type.

According to the third embodiment, by appropriately selecting the split type bases 1A to 1D, it is possible to freely cope with the case where a plurality of rows of tanks are installed. Moreover, these split-type foundation bases are small in size, and the convenience of transportation can be further promoted.

The prefabricated underground tank foundation of the present invention is not limited to the above embodiments, and various design changes are possible within the scope of the basic technical idea. That is, the following aspects are included within the technical scope of the present invention.

The recesses 11 and 18 may be omitted, and the embedding plates 20 and 24 may be installed directly in the recesses.
It is a design consideration to align the 24 surfaces with the surfaces of the base 1 and the base 2, respectively.

C. Effect of the Invention According to the present invention, the base and the base are made of precast material having engaging grooves and engaging protrusions that engage with each other. By fitting the engaging protrusions of the base into the engaging grooves of the base, the base can be accurately installed without displacement or blurring. This facilitates the position adjustment of the foundation table. Also, a strong tank foundation can be constructed by interposing the joining plate. Furthermore, the product is downsized, easy to carry, and simple construction work can be performed.
Construction efficiency is improved.

Furthermore, by dividing the foundation base, it is possible to further promote the downsizing of the precast material and easily deal with a large tank foundation.

[Brief description of drawings]

1 to 10 show an embodiment of a prefabricated underground tank foundation of the present invention, FIG. 1 is a plan view of a precast underground tank foundation of one embodiment (first embodiment), and FIG. Front view, FIG. 3 is a plan view of the base, FIG. 4 is a front view of the base, FIG. 5 is an enlarged sectional view of part A of FIG. 2, and FIG. 6 is a sectional view taken along line BB of FIG. FIG. 7 is a plan view of a joint portion of another embodiment (second embodiment) of the present invention, FIG. 8 is a sectional view taken along the line CC of FIG. 7, and FIG. 9 is still another embodiment of the present invention. FIG. 10 is a perspective view of the embodiment (3rd embodiment), and FIG. 10 is a sectional view taken along line DD of FIG. FIG. 11 is a view showing a construction state of a conventional precast foundation. H ... Underground tank foundation, 1 ... Foundation base, 2 ... Foundation base, 10
... Engagement groove, 10a ... Long groove, 10b ... Short groove, 17 ... Engagement protrusion, 17a
… Long protrusion, 17b… Short protrusion, 28… Joining plate

Claims (4)

[Scope of utility model registration request] 1. A tank foundation in which one or more rows of tanks are arranged, in which a rectangular flat base is provided with a long groove in the width direction and short grooves on both sides of the long groove at regular intervals. A plurality of engaging grooves formed in parallel with each other at a predetermined interval in the longitudinal direction, and in the engaging groove of the base base, long projections fitted to the long groove and the short groove respectively on the lower surface thereof, and A base stand on which engaging projections composed of short projections are provided is fitted, and the base base and the base stand are fixed by a joining plate fixed to the base base and attached to the base stand. Assembled underground tank foundation characterized by. 2. A prefabricated underground tank foundation according to claim 1, wherein in the tank foundation in which one row of tanks is arranged, the foundation base is vertically divided into two in the central portion. 3. A tank base in which two rows of tanks are arranged, an A-type base base having a short groove at one end and a groove having a length half that of the long groove at the other end, and a widthwise direction. 1/2 of long groove
B-type base base having a groove of the same length, and short grooves symmetrically arranged in the longitudinal direction in the central portion, and the length of the short groove and the edge portion is the A-type base base. The prefabricated underground tank foundation according to claim 1, wherein the prefabricated underground tank foundation is a combination of a C-type foundation base that matches the distance between the two grooves of the above. 4. A tank base in which three or more rows of tanks are arranged, an A-type base base having a short groove at one end and a groove half the length of the long groove at the other end, and a full width direction. 1/2 of long groove over
B-type base base having a groove and a short groove symmetrically arranged in the longitudinal direction in the central portion, and the lengths of the short groove and the edge portion are the same as those of the A-type base base. The prefabricated underground tank foundation according to claim 1, which comprises a combination of a C-shaped base base having a groove interval and a D-shaped base base having a long groove over the entire width direction.