Demolition Construction Method for the Bottom of the LNG Storage Tank Raft Foundation

Abstract

The present application discloses a disassembly construction method for the bottom of an LNG storage tank foundation, including: a construction step of enabling operators to disassemble formwork supports for the construction structure presenting the bottom of the LNG storage tank foundation by standing. Since operators can disassemble formwork supports for the construction structure presenting the bottom of the LNG storage tank foundation by standing, the problem that operators cannot completely stand and quickly remove the formwork supports from the bottom of the foundation surface is solved.

Description

Technical Field

[0001] The present invention relates to a disassembly construction method for the bottom of an LNG storage tank foundation, belonging to the technical field of LNG storage tank construction. Background Art

[0002] In order to store natural gas in a liquefied state for peak shaving, it is necessary to build an LNG storage tank. The LNG storage tank is supported by a bottom foundation on pile foundations at a certain height above the ground. When constructing in mountainous areas with uneven terrains such as the Yunnan-Guizhou Plateau, in order to avoid occupying cultivated land in basins, the pile foundations need to be constructed on sloping slopes. Then, formwork supports are erected around the pile foundations at the bottom of the LNG storage tank foundation to form a support system (see the construction method for a large-volume concrete foundation of a large cryogenic storage tank with the Chinese patent publication number CN112049143A), and formwork is installed on the support system to pour the foundation surface.

[0003] When forming the support system, the formwork supports can be easily installed from bottom to top. However, after the foundation surface is poured and cured, the height from the slope to the foundation surface is about 1 m (such as Figure 1 H1 in Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a disassembly construction method for the bottom of an LNG storage tank foundation.

[0005] The present invention is achieved through the following technical solutions.

[0006] A disassembly construction method for the bottom of an LNG storage tank foundation provided by the present invention includes: a construction step of enabling an operator to stand and disassemble the formwork support of the construction structure presenting the bottom of the LNG storage tank foundation.

[0007] The construction step includes first: based on a working space H2 greater than the operator's height, disassembling the notch ejector rod in the heightening groove and then disassembling the bottom support plate to form a working notch.

[0008] The construction step includes then: using the working space H2 and the working notch to disassemble the vertical support and the foundation pouring formwork.

[0009] The construction structure at the bottom of the LNG storage tank foundation includes:

[0010] A sloping slope with a heightening groove in the middle of the slope;

[0011] Pile foundations constructed on the slope;

[0012] Foundation surface constructed on the pile foundations;

[0013] The casting formwork for the bearing platform is installed on the bottom surface of the bearing platform.

[0014] The casting formwork for the bearing platform is stably supported on the bottom surface of the bearing platform through formwork supports. The top rod of the bridging section of the formwork support supports the bottom support plate above the heightening groove, so that the height from the bottom of the heightening groove to the bottom support plate forms a working space H2 greater than the height of the operator.

[0015] The vertical supports of the formwork support stably support the casting formwork for the bearing platform in the working space H1 less than the height of the operator.

[0016] The bottom formwork support of the LNG storage tank bearing platform includes:

[0017] A bridging plate, and bridging section top rods detachably and fixedly installed on the bridging plate at intervals;

[0018] A bottom support plate, which is detachably and fixedly installed at the bottom of the bridging plate to support and resist the bridging plate;

[0019] A notch top rod, which is detachably and fixedly installed with the bottom support plate;

[0020] Vertical supports installed on the left and right sides of the bridging plate to support the casting formwork for the bearing platform.

[0021] The beneficial effect of the present invention is that since the operator can stand to disassemble the formwork support of the construction structure presenting the bottom of the LNG storage tank bearing platform, the problem that the operator cannot stand completely to quickly remove the formwork support from the bottom of the bearing platform is solved. Description of the Drawings

[0022] Figure 1 It is a schematic diagram of the slope body, bearing platform piles, and bearing platform surface;

[0023] Figure 2 It is a schematic diagram of the formwork support supporting the casting formwork for the bearing platform around the bearing platform piles;

[0024] Figure 3 It is a schematic diagram of the formwork support;

[0025] In the figure: 1 - slope body; 11 - heightening groove; 2 - bearing platform piles; 3 - bearing platform surface; 4 - notch top rod; 5 - bridging plate; 6 - bridging section top rod; 61 - vertical support; 63 - flange; 64 - force dividing rod; 65 - sleeve; 7 - bottom support plate; 8 - casting formwork for the bearing platform. Detailed Embodiments

[0026] The technical solution of the present invention will be further described below, but the scope of protection is not limited thereto.

[0027] As Figures 2 to 3 shown.

[0028] A bottom formwork support for the LNG storage tank foundation slab of the present application includes:

[0029] A bridging plate 5 formed of a steel plate in an arc shape, and bridging section top rods 6 detachably and fixedly installed on the bridging plate 5 at intervals, and the bridging section top rods 6 support the foundation slab casting formwork 8 above the height compensation groove 11;

[0030] A bottom support plate 7 formed of a steel plate in an arc shape, and the bottom support plate 7 is detachably and fixedly installed at the bottom of the bridging plate 5 to support and resist the bridging plate 5;

[0031] A notch top rod 4 formed of a wooden square or a steel pipe, and the notch top rod 4 is detachably and fixedly installed with the bottom support plate 7, and the bottom of the notch top rod 4 is installed in the height compensation groove 11 of the slope body 1;

[0032] Erecting supports 61 installed on the left and right sides of the bridging plate 5 to support the foundation slab casting formwork 8.

[0033] The end of the bridging plate 5 is detachably installed in the middle of the inner vertical rod of the erecting support 61 through a flange 63 by bolts and nuts, and the flange 63 is installed on the outer vertical rod of the erecting support 61 through a force dividing rod 64 and a sleeve 65, and the sleeve 65 is two detachable and fixed petals; the gravity of the concrete poured by the bridging section top rod 6 supporting the foundation slab casting formwork 8 is transmitted to the bridging plate 5, and part of the force received by the bridging section top rod 6 on the bridging plate 5 is directly transmitted to the slope body 1 through the notch top rod 4, and part is transmitted to the erecting support 61 through the flange 63, and the flange 63, the force dividing rod 64 and the sleeve 65 ensure the position of the side of the bridging plate 5.

[0034] During disassembly, first disassemble the notch top rod 4, the bottom support plate 7 and remove the bridging plate 5 and the bridging section top rods 6 to form a disassembly operation notch, and then use the operation notch as the operation space to disassemble the erecting support 61 and the foundation slab casting formwork 8, solving the problem that the support system with the vertical rod directly supporting the bottom formwork of the foundation slab cannot quickly form an operation notch for disassembly.

[0035] A construction structure at the bottom of the LNG storage tank foundation slab of the present application includes:

[0036] A slope body 1 with a slope as the construction surface, and a height compensation groove 11 for supplementing the height is pre-excavated in the middle of the slope body 1; completely excavating the middle of the slope body 1 results in a large amount of earthwork and serious environmental damage;

[0037] Foundation slab piles 2 constructed on the slope body 1 by reinforced concrete construction;

[0038] A foundation slab surface 3 constructed on the foundation slab piles 2 by reinforced concrete construction;

[0039] A foundation slab casting formwork 8 installed on the bottom surface of the foundation slab surface 3;

[0040] The formwork support for pouring the bearing platform realizes the pouring by stably supporting the formwork 8 for pouring the bearing platform on the bottom surface of the bearing platform surface 3. The top rod 6 of the bridging section of the formwork support supports the bottom support plate 7 above the heightening groove 11, so that the height from the bottom of the heightening groove 11 to the bottom support plate 7 forms an operating space H2 greater than the height of the operator;

[0041] The vertical support 61 of the formwork support stably supports the formwork 8 for pouring the bearing platform in the operating space H1 less than the height of the operator.

[0042] When demolishing the construction structure, the operator can stand completely in the operating space H2 greater than the height of the operator to carry out the demolition operation, and then use the operating space H2 as the basic space to demolish the two-side frameworks, solving the problem that the operator cannot stand completely to quickly demolish the formwork support from the bottom of the bearing platform surface.

[0043] A disassembly construction method for the bottom of an LNG storage tank bearing platform according to the present application includes the following steps:

[0044] Step 1: Based on the operating space H2 greater than the height of the operator, disassemble the notch top rod 4 in the heightening groove 11 and then disassemble the bottom support plate 7 to form an operating notch;

[0045] Step 2: Use the operating space H2 and the operating notch to disassemble the vertical support 61 and the formwork 8 for pouring the bearing platform.

[0046] It is realized that the operator can stand to disassemble the formwork support of the construction structure presenting the bottom of the LNG storage tank bearing platform, solving the problem that the operator cannot stand completely to quickly disassemble the formwork support from the bottom of the bearing platform surface.

[0047] This technology originates from the Guiyang Natural Gas Storage and Emergency Peak-Shaving Facility Project.

Claims

1. A disassembly construction method for the bottom of an LNG storage tank foundation, characterized in that, Including: Implementing the construction steps for the operator to remove the formwork support of the construction structure presenting the bottom of the LNG storage tank foundation by standing; The construction steps include first: Based on the working space H2 greater than the operator's height, after removing the notch ejector rod (4) in the height compensation groove (11), remove the bottom support plate (7) to form a working notch; The construction steps include then: Using the working space H2 and the working notch to remove the vertical support (61) and the foundation casting formwork (8); The construction structure at the bottom of the LNG storage tank foundation includes: An inclined slope (1) with a slope, and a height compensation groove (11) in the middle of the slope (1); Foundation piles (2) of the foundation, constructed on the slope (1); Foundation surface (3), constructed on the foundation piles (2); Foundation casting formwork (8), installed on the bottom surface of the foundation surface (3); The foundation casting formwork (8) is stably supported on the bottom surface of the foundation surface (3) through the formwork support. The bridging section ejector rod (6) of the formwork support supports the bottom support plate (7) above the height compensation groove (11), so that the height from the bottom of the height compensation groove (11) to the bottom support plate (7) forms a working space H2 greater than the operator's height; The vertical support (61) of the formwork support stably supports the foundation casting formwork (8) in the working space H1 less than the operator's height; The formwork support at the bottom of the LNG storage tank foundation includes: A bridging plate (5), and bridging section ejector rods (6) detachably and fixedly installed on the bridging plate (5) at intervals; A bottom support plate (7), detachably and fixedly installed at the bottom of the bridging plate (5) to support and resist the bridging plate (5); A notch ejector rod (4), detachably and fixedly installed with the bottom support plate (7); Vertical supports (61) installed on the left and right sides of the bridging plate (5) to support the foundation casting formwork (8).

2. The disassembly construction method for the bottom of the LNG storage tank bearing platform according to claim 1, characterized in that: The end of the bridging plate (5) is detachably installed in the middle of the inner vertical rod of the vertical support (61) through a flange plate (63).

3. The disassembly construction method for the bottom of the LNG storage tank bearing platform according to claim 2, characterized in that: The flange plate (63) is installed on the outer vertical rod of the vertical support (61) through a force dividing rod (64) and a sleeve (65).

4. The disassembly construction method for the bottom of the LNG storage tank bearing platform according to claim 1, characterized in that: The gravity of the concrete poured by the bridging section ejector rod (6) supporting the foundation casting formwork (8) is transmitted to the bridging plate (5). Part of the force received by the bridging section ejector rod (6) on the bridging plate (5) is directly transmitted to the slope (1) through the notch ejector rod (4), and part is transmitted to the vertical support (61) through the flange plate (63).

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