JPS5916624B2 - How to build an underground tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for constructing an underground tank suitable for storing high temperature, low temperature, and high pressure liquids such as LPG.

In recent years, tanks for storing the liquid have tended to be constructed underground for security reasons and other reasons.

However, in conventional underground tanks, while the reinforced concrete is generally strong enough to prevent damage from earthquakes and other events, the inside of the reinforced concrete is lined with a steel plate or other material with an insulating material in order to prevent leakage and evaporation of the stored liquid. ing. As the capacity of the tank increased, the side walls of the reinforced concrete Ro were gradually made thicker, and the dimensions of the reinforcing bars had to be made thicker, and all of this construction work was carried out on-site, resulting in large construction costs. It requires a long construction period. Recently, therefore, a method of constructing an underground tank by assembling factory-produced segments and J5 panels on the ground, or sinking them underground using the welling method while assembling them, has become more economical than the conventional method. There is less area dedicated to construction, which does not disrupt the living environment around the construction site, and reduces construction time■
0 It has come to attract attention because of the fact that it is

However, although this construction method has been put to practical use in the construction of water storage tanks, there are problems with bond strength and other issues, and it is still a problem in the construction of tanks for storage of high temperature, low temperature, and high pressure liquids such as liquefied gas. The current number of cases is 25. The purpose of this invention is to provide an extremely effective and suitable underground tank construction method that uses economically obtainable segments and provides a tank body with high strength based on the above-mentioned viewpoints. Feature 30 is that plate bodies provided with insertion holes for press dressing wires are arranged in a ring shape with double spaces between the inner and outer plates, and the space formed between the inner and outer plate bodies is filled with concrete, while the above-mentioned A strong tensile force is applied to the press-dressed wire inserted through the insertion hole to construct the 35th circumferential wall for the tank, and while this construction work is being carried out, or after the entire tank circumferential wall is constructed, it is sunk underground using the Wellue method. The point is that it allows you to build a tank.

The present invention will be specifically explained below with reference to the drawings.
1 to 3 show embodiments of the present invention, in which FIG. 1 is a schematic perspective view illustrating the structure of the tank peripheral wall, FIG. 2 is a schematic explanatory diagram of the first embodiment, and FIG. FIG. 3 is a schematic explanatory diagram of a second embodiment.

First, on the ground where the underground tank E is to be constructed, rectangular prefabricated panels A having insertion holes 2 for inserting the press dress wires 1 in the vertical and horizontal directions are arranged in an annular shape with a required diameter at intervals a between the inside and outside. A space b formed between the inner and outer prefabricated panels A is filled with concrete 3.

Next, a strong tensile force is applied to the press dress wires 1 inserted into the respective insertion holes 2 (which horizontally connect the respective prefabricated panels A), and a strong tensile force is applied to the first stage tank peripheral wall 4 constituting the underground tank E. is constructed.

In the first embodiment of the present invention, after the construction of the tank peripheral wall 4 of the first stage described above is completed, the earth and sand inside the tank peripheral wall 4 is excavated and ground by the own weight of the tank peripheral wall 4. Using the so-called welle method, the first stage tank peripheral wall 4 is sunk into the ground up to its upper surface, and the second stage, third stage, and so on are placed on top of it in the same manner as described above. After the tank circumferential wall 4 is laid down and sunk underground by the above-mentioned Wellue method, and the tank circumferential wall of the required height is formed, a strong tensile force is applied to each press dress wire 1 inserted into the vertical insertion hole 2. This completes the construction of the required peripheral wall of the underground tank, and then a bottom plate is constructed on this, and a membrane is attached to the inner peripheral wall via an appropriate heat insulating material to complete the construction of the underground tank E. The second embodiment of the present invention shown in FIG. This is a method of constructing an underground tank E by sinking it into the ground using the Wellue method.
Since the outline is the same as that of the first embodiment, a detailed explanation will be omitted here.

As mentioned above, this invention uses plates such as prefabricated panels that are mass-produced in a factory, so it is not only extremely economical, but also a constant material with stable quality. In addition, since each adjacent plate is pressed while applying a strong tensile force to the press-dress wire inserted through each insertion hole provided in the plate, the entire circumferential wall of the tank can be covered both vertically and horizontally by the press-dress wire. As a result, it is possible to obtain a tank with extremely high resistance to internal pressure.Furthermore, in this invention, the plate bodies are double-layered, the inner and outer plates, and an appropriate interval is provided between the inner and outer plates. Since the space that is formed is filled with concrete, the wall thickness can be freely set according to the scale of the tank being constructed, which has extremely large industrial effects.

In addition, particularly according to the present invention, not only the inner and outer panels are made of prestressed concrete structure, but also the entire tank wall structure, including the concrete 3 cast on site, is prestressed and extremely robust. It's possible. That is, by finally applying a press dress in the vertical direction, the concrete 3 is press-dressed in the vertical direction like the inner and outer plates due to the surface friction resistance with the inner and outer plates, and the wall thickness of the concrete 3 is A press dress is also applied in the direction in which the concrete is compressed, and as a result, the entire triple-layered structure becomes a prestressed concrete structure.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; FIG. 1 is a schematic perspective view illustrating the structure of the tank peripheral wall, FIG. 2 is a schematic explanatory diagram of the first embodiment, and FIG. 3 is a schematic diagram of the second embodiment. It is an explanatory diagram. In the figure, 1...press dress wire, 2...
...Insertion hole, 3...Concrete, 4.
... Tank peripheral wall, A ... Prefabricated panel, a ... Interval, b ... Space.

Claims (1)

[Claims] 1 Plate bodies provided with prestress wire insertion holes vertically and horizontally are arranged in an annular manner at double intervals between the inner and outer plates, and the space formed between the inner and outer plates is filled with concrete, while the A strong tensile force is applied to the prestress wire inserted into the insertion hole to construct the tank peripheral wall, and while this construction work is being carried out, or after the entire tank peripheral wall is constructed and then sunk underground using the well construction method, the vertical An underground tank construction method characterized in that the underground tank is constructed by applying a tensile force to a prestressed wire inserted through an insertion hole in the direction.