JP2001180793A - Side wall part structure for underground storage tank - Google Patents

Side wall part structure for underground storage tank

Info

Publication number
JP2001180793A
JP2001180793A JP37330199A JP37330199A JP2001180793A JP 2001180793 A JP2001180793 A JP 2001180793A JP 37330199 A JP37330199 A JP 37330199A JP 37330199 A JP37330199 A JP 37330199A JP 2001180793 A JP2001180793 A JP 2001180793A
Authority
JP
Japan
Prior art keywords
side wall
structure
segment
storage tank
underground storage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP37330199A
Other languages
Japanese (ja)
Inventor
Masaharu Miyazaki
Hideaki Nakamura
Yoshihiro Nose
Hidenori Suzuki
英晃 中村
正治 宮崎
吉弘 能勢
英憲 鈴木
Original Assignee
Ishikawajima Harima Heavy Ind Co Ltd
石川島播磨重工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ishikawajima Harima Heavy Ind Co Ltd, 石川島播磨重工業株式会社 filed Critical Ishikawajima Harima Heavy Ind Co Ltd
Priority to JP37330199A priority Critical patent/JP2001180793A/en
Publication of JP2001180793A publication Critical patent/JP2001180793A/en
Pending legal-status Critical Current

Links

Abstract

(57) [Problem] To provide a side wall structure of an underground storage tank in which a segment can be made to function as a cold insulator, thereby making it possible to reduce the overall thickness of the cold insulator and the side wall, thereby reducing the construction cost. A side wall section includes a side wall body formed of a concrete side wall and a segment structure, and a membrane is disposed in a layered manner via a cold insulator having a predetermined thickness. The body 11 is constituted by assembling the divided segments 11A,
A is formed by surrounding the lateral periphery of the internal lightweight concrete portion 11a with a reinforcing structure 11b as reinforcing means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side wall structure of an underground storage tank for storing liquefied natural gas and the like, and more specifically, a membrane, a cold insulator, a segment structure, and a concrete side wall are arranged in layers from the inner side. The present invention relates to a side wall structure comprising:

[0002]

2. Description of the Related Art Underground storage tanks for storing liquefied natural gas and the like are:
As shown in a conceptual cross-sectional view of FIG. 4, a cylindrical housing space is formed in the ground by a cylindrical side wall 1 'and a bottom slab 2 at the bottom, and a spherical roof 3 having an upper opening is provided. It is configured to cover.

[0005] As shown in an enlarged view of FIG. 5 and a partially enlarged view of FIG. 6, the side wall portion 1 ′ is provided with a layered membrane 30 with a cooling material 20 ′ inside a side wall frame 10 ′. It is configured.

[0004] The side wall frame 10 'has its own weight, gas pressure, liquid pressure,
And a structure supporting a load such as water pressure, and is composed of a segment structure 11 'formed of reinforced concrete and a concrete side wall 12'.

[0005] The segment structure 11 'is constructed by assembling segments 11A' in which the entire periphery of the side wall is divided into 48 in the circumferential direction and 25 in the height direction, for example.
In addition to defining the shape and accuracy of 0 ', it also functions as a formwork when constructing the outer concrete side wall 12'.

The heat insulating material 20 'is formed of a polyurethane foam having a predetermined thickness, functions to block external heat input and transmit the load received by the membrane 30' to the side wall, and anchors to the side wall frame 10 '. Has been fixed by.

[0007] The membrane 30 'is a thin plate made of a stainless alloy, is corrugated to absorb thermal contraction and thermal expansion, and is formed to have liquid tightness and air tightness.

[0008]

However, the segment 11A 'in the side wall portion 10' having the above-described structure is used.
After the (segment structure 11 ') has functioned as the accuracy regulation of the side wall frame 10' and the formwork as described above, the cold insulator 2
Only the load from 0 ′ is transmitted to the concrete side wall 12 ′ and does not function as a strength member of the side wall frame 10 ′.
The thermal conductivity was the same as that of the concrete side wall 12 ', and did not function as a cooling member.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and enables the segment structure to function as a cooling material, thereby making it possible to reduce the thickness of the cooling material and the entire side wall, thereby reducing the construction cost. An object of the present invention is to provide a sidewall structure of an underground storage tank that can be used.

[0010]

In order to achieve the above object, a side wall structure of an underground storage tank according to the present invention comprises a membrane structure, a cold insulator, a segment structure formed by assembling divided segments, and a concrete side wall having a layered structure from the inner surface side. In the side wall portion of the underground storage tank provided in the above, the segment is formed of lightweight concrete having a small thermal conductivity, and further, if necessary, reinforcing means such as surrounding the periphery with a steel plate. Characterized by being reinforced by

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a partially enlarged cross-sectional view of a side wall to which an example of a side wall structure of an underground storage tank according to the present invention is applied.

The illustrated side wall portion 1 is provided inside the side wall frame 10.
The membrane 30 is arranged in a layered manner via a cold insulator 20 having a predetermined thickness.

The side wall frame 10 includes a concrete side wall 12.
And a segment structure 11 disposed on the inner surface side.

As shown in a plan view of FIG. 2, the segment structure 11 has an overall shape of, for example, a 48-gon shape, and is divided into each side (ie, the entire periphery of the side wall is divided into 48 in the circumferential direction). At the same time, it is constructed by assembling, for example, 25 divided segments 11A in the height direction.

As shown in the perspective view of FIG. 3, the segment 11A has a trapezoidal shape corresponding to each side of the segment structure 11 having a plane shape of 48, and has a predetermined height. The periphery is formed by being surrounded by a reinforcing structure 11b as a reinforcing means. That is, lightweight concrete is cast inside the box-shaped reinforcing structure 11b to form the lightweight concrete portion 11a.

The lightweight concrete portion 11a is formed using a lightweight aggregate and has a lower specific gravity and a lower thermal conductivity than ordinary concrete, but has a poor compressive strength.

The reinforcing structure 11b is formed by assembling a plate of a predetermined thickness such as a stainless steel alloy, for example, and reinforces the lightweight concrete 11a to be filled therein so that the compressive strength of the entire segment 11a is the same as that of ordinary concrete. It is configured so that it can be increased to a degree or more.

The cold insulator 20 is formed of a polyurethane foam having a predetermined thickness, and is fixed to the side wall frame 10 (segment structure 11) by an anchor (not shown).

Thus, in the side wall portion 10 having the above structure, the segment structure has a cooling function,
It becomes possible to make the thickness of the expensive cold insulator 20 thin,
Construction costs can be reduced.

For example, in the conventional structure shown in FIG. 6, the thickness of the concrete side wall 12 ': 2.2 (m) The thickness of the segment 11A': 0.15 (m) The thickness of the cold insulator 20 ': 0.1. 21 (m) and the thermal conductivity of the concrete side wall 12 'and the segment 11A': λ = 2.3 (W / (m · K)) The thermal conductivity of the cooling material: λ = 0.031 (W / (M · K)), the heat transmittance: K ′ and the overall thermal conductivity: λ ′ are: K ′ = (2.2 / 2.3 + 0.15 / 2.3 + 0.21 / 0.031) −1 = 0.128 λ ′ = K ′ · x (2.2 + 0.15 + 0.21) = 0.32768.

On the other hand, the configuration of the present invention is applied by setting the thickness of the concrete side wall 12 and the segment 11 to be the same,
Thermal conductivity of segment 11 made of lightweight concrete: λ
= 0.17, a similar heat transmittance K is obtained (that is, K ′).
= K) The thickness of the heat insulating material 20: x is calculated. From K = (2.2 / 2.3 + 0.15 / 0.17 + x / 0.031) -1 = 0.128, x = (1 / 0.128-1.8) × 0.031 = 0.19 ( m), and the thickness of the cold insulator 20 is 0.21 (m) of the conventional configuration.
Can be reduced by about 10%.

In the above configuration example, the reinforcing means for reinforcing the segment 11A is constituted by the reinforcing structure 11b surrounding the periphery of the lightweight concrete portion 11a. However, the reinforcing means is not limited to this structure, and the reinforcing member is provided inside. Can be changed as appropriate. If the required strength can be obtained, the reinforcing means may not be provided.

[0024]

As described above, the side wall structure of the underground storage tank according to the present invention comprises a membrane structure, a cooling material, a segment structure formed by assembling divided segments, and a concrete side wall arranged in layers from the inner surface side. In the side wall of the installed underground storage tank, the segment is formed of lightweight concrete with low thermal conductivity, so that the segment functions as a cold insulator, reducing the thickness of the expensive cold insulator. And the construction cost can be reduced.

[0025] Further, since it is reinforced by reinforcing means such as surrounding the periphery with a steel plate as required, even if lightweight concrete having a small compressive strength is used,
It can be configured to have a strength that can withstand the load acting via the cold insulator.

[Brief description of the drawings]

FIG. 1 is a partially enlarged cross-sectional view of a side wall portion to which a configuration example of a side wall portion structure of an underground storage tank according to the present invention is applied.

FIG. 2 is a plan view of the entire segment structure.

FIG. 3 is a perspective view of a segment of a segment structure.

FIG. 4 is a conceptual sectional view of an underground storage tank.

FIG. 5 is an enlarged view of the side wall portion.

FIG. 6 is a partially enlarged view of a side wall portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Side wall part 10 Side wall skeleton 11 Segment structure 11A segment 11a Lightweight concrete part (lightweight concrete) 11b Reinforcement structure (steel plate, reinforcing means) 12 Concrete side wall 20 Cold insulator 30 Membrane

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hidenori Suzuki 3-2-16-1 Toyosu, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries, Ltd. Tokyo Engineering Center (72) Inventor Masaharu Miyazaki 3-2-2 Toyosu, Koto-ku, Tokyo No. 16 Ishikawajima Harima Heavy Industries, Ltd. Tokyo Engineering Center F term (reference) 2D047 AB02 3E070 AA03 AA13 AB32 DA02 DA03 NA01 SA01 SA06 SA20 3E073 AA01 AB04 CA01 CB02 CC01 CD08

Claims (3)

[Claims]
1. A side wall portion of an underground storage tank having a membrane structure, a cold insulator, a segment structure formed by assembling divided segments, and a concrete side wall arranged in layers from an inner surface side, wherein the segment has a thermal conductivity. A side wall structure of an underground storage tank characterized by being formed of lightweight concrete having a small size.
2. The side wall structure of an underground storage tank according to claim 1, wherein said segments are constructed by reinforcing lightweight concrete with reinforcing means.
3. The side wall structure of an underground storage tank according to claim 2, wherein the segment is formed by surrounding lightweight steel with a steel plate, and the reinforcing means is the steel plate.
JP37330199A 1999-12-28 1999-12-28 Side wall part structure for underground storage tank Pending JP2001180793A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP37330199A JP2001180793A (en) 1999-12-28 1999-12-28 Side wall part structure for underground storage tank

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP37330199A JP2001180793A (en) 1999-12-28 1999-12-28 Side wall part structure for underground storage tank

Publications (1)

Publication Number Publication Date
JP2001180793A true JP2001180793A (en) 2001-07-03

Family

ID=18501934

Family Applications (1)

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JP37330199A Pending JP2001180793A (en) 1999-12-28 1999-12-28 Side wall part structure for underground storage tank

Country Status (1)

Country Link
JP (1) JP2001180793A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101428210B1 (en) * 2012-11-14 2014-08-07 현대중공업 주식회사 Underground type LNG storage tank and method for constructing there of
KR101437745B1 (en) * 2012-12-11 2014-09-03 현대중공업 주식회사 Aboveground type liquid storage tank and method for constructing there of
KR101536864B1 (en) * 2014-03-21 2015-07-23 현대중공업 주식회사 Aboveground type Liquefied Natural Gas storage tank and method for constructing there of
KR101745509B1 (en) 2012-04-26 2017-06-09 가부시키가이샤 아이에이치아이 Free-standing liner unit and method for building tank

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101745509B1 (en) 2012-04-26 2017-06-09 가부시키가이샤 아이에이치아이 Free-standing liner unit and method for building tank
US10364939B2 (en) 2012-04-26 2019-07-30 Ihi Corporation Free-standing liner unit and method of building tank
KR101428210B1 (en) * 2012-11-14 2014-08-07 현대중공업 주식회사 Underground type LNG storage tank and method for constructing there of
KR101437745B1 (en) * 2012-12-11 2014-09-03 현대중공업 주식회사 Aboveground type liquid storage tank and method for constructing there of
KR101536864B1 (en) * 2014-03-21 2015-07-23 현대중공업 주식회사 Aboveground type Liquefied Natural Gas storage tank and method for constructing there of
WO2015142126A1 (en) * 2014-03-21 2015-09-24 현대중공업 주식회사 Ground liquefied natural gas storage tank and method for manufacturing same
US10533707B2 (en) 2014-03-21 2020-01-14 Hyundai Heavy Industries Co., Ltd. Ground liquefied natural gas storage tank and method for manufacturing the same

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