JPH08100544A - Extraordinary large underground tank - Google Patents

Abstract

PURPOSE: To rationally increase the capacity as a group of large underground tanks, by connecting a plurality of large underground tank units to match the shape of the location area. CONSTITUTION: Seven large scale underground tank units 1,..., for example, are connected one another to form a honeycomb shape or horizontally in a cut-off wall constructed with a continuous underground wall 2 to obtain a large scale underground group. Auxiliary devices like pumps, measuring instruments and apparatus, pipes to control the whole large scale underground group are contained in the central large scale underground tank unit of the group, without storage materials, in order to control the centralized large scale underground tank group, and increase the control efficiency. In this case, partition walls 4 are all structural walls and serve as partitioning walls dividing respective tanks. The sectional shape and area of respective units 1 are appropriately decided including the space for the centralized control. And the capacity is increased by grouping large scale underground tanks with suitable dimensions.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to the shape of a very large underground tank.

[0002]

2. Description of the Related Art A large underground tank used for storing LNG, crude oil, etc. is generally constructed by the following procedure.

(1) An impermeable layer such as cohesive soil at an appropriate depth of the ground is selected.

(2) A water blocking wall (such as an underground continuous wall) reaching the impermeable layer is constructed in a cylindrical shape.

(3) The tank body is constructed inside the water blocking wall by various construction methods.

The water blocking wall and the side wall of the large-scale underground tank are required to withstand the earth pressure and water pressure applied from the surroundings evenly, so it is most efficient to construct them in a cylindrical shape.

[0007] Large underground tanks have been promoted to have a large capacity, and at present, those having a diameter of about 80 to 90 m, a depth of about 40 to 50 m, and a capacity of more than 200,000 Kl have appeared.

[0008]

To increase the capacity of the underground tank, naturally, there are two possible ways of expanding the diameter and increasing the depth. There is a problem in terms of safety as well as economic problems such as the need to further increase the thickness of the underground tank side wall.
In addition, increasing the depth also leaves a problem in economic efficiency.

Further, when a large storage capacity cannot be dealt with only by increasing the capacity of a large underground tank alone, it is necessary to construct a plurality of large underground tanks as a large underground tank group. In order to avoid the influence of large underground tanks, it is inevitable that adjacent large underground tanks will be placed at a considerable distance from each other, which will inevitably reduce the utilization rate of the land.

[0010]

[Means for Solving the Problems] In order to solve the above problems, the present invention does not rely on increasing the capacity of a large underground tank alone, but connects a plurality of large underground tanks to each other in a shape corresponding to the shape of the site. The purpose is to rationalize the construction of ultra-large underground tanks by constructing large underground tank groups.

That is, the present invention relates to an ultra-large underground tank in which a plurality of large underground tanks are horizontally connected to each other via a partition wall.

The main point of the present invention is to form a large underground tank unit by connecting these large underground tank units horizontally through a partition without particularly increasing the capacity of the large underground tank unit. As a result, a large underground tank group as a whole can cope with a large storage amount. Then, the utilization rate of the site is improved by making the connection shape suitable for the shape of the site.

Two types are adopted as the connecting type of the large underground tank of the present invention. One is when constructing on a vast site with a relatively high degree of freedom in land use, by connecting about 5 to 10 large underground tanks each having a substantially regular hexagonal horizontal section in a honeycomb shape in the horizontal direction. It is a group of two large underground tanks. The side wall (outer wall) of this large underground tank group may be a large number of bent flat planes that form a substantially regular hexagonal horizontal section, but a curved surface modified into an arc shape will retain the strength of the large underground tank group. From the viewpoint of.

The other one is a case where the site is constructed on a long and narrow site with a relatively low degree of freedom of use of the site, and about 3 to 10 large underground tanks each having a substantially circular horizontal section, and the circular sections of the horizontal section overlap. They are connected horizontally in a shape to form one large underground tank group. The large underground tanks may be connected in a straight line in one direction, may be connected in a curved line in one direction, and may be bent and sometimes connected. By arranging according to the shape of the land, the efficiency of land use is improved. The circular overlap rate of the large underground tanks to be connected is appropriately determined depending on the shape of the site and the capacity of the large underground tank group.

In either of the above two types, a vertical partition wall is constructed at the connecting portion, but this partition wall may be of a form that completely separates each large underground tank unit, or may be a vertical partition wall. It is also possible that the storage liquid is circulated so that the storage liquid can be distributed.

The large underground tank group of the present invention is constructed in the same manner as the conventional large underground tank construction method. For example,
(1) At the same time constructing a water stop wall with a continuous underground wall on the outer circumference, at the same time constructing a large underground tank group partition wall with a continuous underground wall, draining the inside of the waterproof wall, excavating to a specified depth, and winding in a large size Construction method to build underground tanks. (2) After constructing a water stop wall with a continuous underground wall on the outer circumference, construct a large underground tank group main body (including bulkheads) on the ground, and in parallel with internal excavation, reverse winding to a large underground tank Construction method to build a group. (3) Without constructing a water-stop wall by a continuous underground wall, construct a tank bottom slab and side walls (including partition walls) one after another on the ground, excavate the bottom slab bottom ground, sunk the tank, and reverse-wind it. Open well construction method to build a large underground tank group. The construction method such as is appropriately adopted.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIG. 1 shows an example in which the large underground tanks of the present invention are connected in a honeycomb form to form a large underground tank group. (A) is a perspective cutaway view of a part and (b) is a cross section. FIG. 6C is a cross-sectional view of another example.

In the example shown in (a) and (b), a large underground is constructed by connecting seven large underground tank units 1 ... In a honeycomb shape inside a water blocking wall constructed by an underground continuous wall 2. Tanks are built. In this example, the large-scale underground tank single unit 1 in the center of the seven large-scale underground tank single units 1 does not store stored items inside but stores auxiliary equipment such as pumps, instrumentation, and piping for managing the entire large underground tank group. , The large-scale underground tanks are collectively managed to improve management efficiency. In this example, the partition walls 4 are all structural walls, and at the same time are partition walls that partition each large underground tank unit 1. In this example, all of the seven large underground tanks 1 have a substantially regular hexagonal cross section and have substantially the same internal volume, but the sectional shape is not limited to the approximately regular hexagon, and the internal volume (cross sectional area) Are not limited to equal ones. The cross-sectional shape and cross-sectional area of each single unit 1 are appropriately determined, including the space for intensive management. In the example shown in (c), each single unit 1
The outer peripheral side wall 3 has an arc-shaped horizontal cross section.

FIG. 2 shows an example in which the large underground tanks of the present invention are connected in the horizontal direction so that the circles of the horizontal cross-sections overlap each other to form one large underground tank group. A perspective view, (b) is a cross-sectional view.

A large underground tank group is constructed by horizontally connecting four large underground tank units 1 ... In a horizontal direction in the form of a circular cross-section in the interior of a water stop wall constructed by an underground continuous wall 2. ing. In this example, the partition walls 4 are all structural walls, and are not partition walls that partition the large-scale underground tank single bodies 1, and the stored items can be distributed between the single single bodies 1. In this example, 4 large underground tanks alone 1 ...
Are connected in a straight line, but may be bent or connected in a curved shape depending on the shape of the site.

[0022]

Since the present invention is configured as described above, it has the following effects.

(1) Since the large-capacity large underground tanks are not made large by enlarging the large underground tanks but by grouping large-sized underground tanks of an appropriate size, the large underground tanks become large. It is possible to achieve a large capacity with an appropriate construction cost without incurring an unnecessary construction cost rise.

(2) Since a plurality of large underground tanks are connected to each other in a shape corresponding to the shape of the site to increase the capacity of the large underground tank group, the utilization rate of the site can be improved.

[Brief description of drawings]

FIG. 1 is a view showing an example in which a single large-scale underground tank of the present invention is connected in a honeycomb shape to form a large-scale underground tank group,
(A) is a partially cut perspective view, (b) is a cross-sectional view, and (c) is a cross-sectional view of another example.

FIG. 2 shows an example of a single large-scale underground tank group in which horizontal large-scale underground tanks of the present invention are connected in a horizontal direction in such a manner that circles of horizontal cross-sections overlap each other, and FIG. ,
(B) is a cross-sectional view. 1 ・ ・ Large underground tank alone, 2 ・ ・ Underground continuous wall, 3 ・ ・
Peripheral side wall, 4 ... Partition wall, 5 ... Floor slab, 6 ... Roof.

Claims (3)

[Claims] 1. An ultra-large underground tank in which a plurality of large underground tanks are horizontally connected to each other via a partition wall. 2. The ultra-large underground tank according to claim 1, wherein the large underground tanks are connected in a honeycomb shape. 3. The super-large underground tank according to claim 1, wherein the large-sized underground tanks are connected so that the horizontal cross section has an overlapping circular shape.