Structure of oil storage cavern

Abstract

The utility model relates to oil storage technology field, concretely relates to a structure of oil storage cavern, including oil storage room and a plurality of first grouting hole. The oil storage room sets up in the underground rock stratum, the inner wall of oil storage room is equipped with waterproof layer, the outer surface of waterproof layer is equipped with the concrete layer of spouting, a plurality of first grouting hole surrounds the oil storage room arrangement, every first grouting hole's top all with the water curtain tunnel of oil storage room top intercommunication, every first grouting hole's bottom all are lower than the bottom plate of oil storage room, the grouting material is injected in first grouting hole. The application through the waterproof layer, the first grouting hole and the grouting material filled in the first grouting hole's synergies, can realize good waterproof and water stop effect to the oil storage room, significantly reduce the groundwater from the inside wall of oil storage room to the internal infiltration situation, the quality safety of the oil stored is guaranteed effectively.

Description

Technical Field

[0001] This utility model relates to the field of oil storage technology, and in particular to the structure of an oil storage cavern. Background Technology

[0002] Oil storage caverns, constructed within underground rock formations, offer significant protective advantages compared to surface oil tanks, preventing wartime damage and offering relatively lower maintenance costs. However, when located below the groundwater level, especially near the sea, groundwater can easily seep into the cavern, contaminating the stored oil. Therefore, further structural optimization and improvement of oil storage caverns are urgently needed to effectively reduce the probability of leakage. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of existing oil storage caverns, which are prone to groundwater infiltration into the interior, and to provide a structure for an oil storage cavern.

[0004] This utility model provides a structure for an oil storage cavern, comprising: An oil storage chamber is located in an underground rock formation; the inner wall of the oil storage chamber is provided with a waterproof layer, and the outer surface of the waterproof layer is provided with a sprayed concrete layer. A plurality of first grouting holes are arranged around the oil storage chamber; the top of each first grouting hole is connected to the water curtain tunnel above the oil storage chamber, and the bottom of each first grouting hole is lower than the bottom plate of the oil storage chamber. Grouting material was injected into the first grouting hole.

[0005] This utility model provides a structure for an oil storage chamber, which is mainly used to store various oil products, including crude oil and refined oil products such as gasoline, diesel, and kerosene. The waterproof layer effectively prevents moisture from the rock strata from penetrating into the oil storage chamber, providing basic waterproof protection for the oil products inside. The shotcrete layer reinforces the inner wall of the oil storage chamber, enhancing its stability; simultaneously, the shotcrete layer also acts as a protective layer for the waterproof layer, preventing damage to it. A plurality of first grouting holes are used to construct grouting channels in the rock strata surrounding the oil storage chamber; the top of each first grouting hole is connected to the water curtain tunnel, allowing grouting operations to be performed within the water curtain tunnel, making the operation more convenient and safer; furthermore, the bottom of each first grouting hole is lower than the bottom plate of the oil storage chamber, ensuring that the entire surrounding facade of the oil storage chamber can be grouted for water-stopping operations. The grouting material, after solidification, has a water-stopping function. The grouting material can penetrate and diffuse into the cracks in the rock strata under pressure in the first grouting hole, thereby gradually forming a complete water-stopping curtain in the rock strata surrounding the oil storage chamber. This can effectively reduce the infiltration of groundwater into the oil storage chamber, thereby reducing the risk of groundwater contamination of the stored oil.

[0006] This invention, through the synergistic effect of the waterproof layer, the first grouting hole, and the grouting material filling the first grouting hole, can achieve good waterproof and water-stopping effects on the oil storage chamber, significantly reducing the infiltration of groundwater from the inner wall of the oil storage chamber into the interior, and effectively ensuring the quality and safety of the stored oil.

[0007] Preferably, the bottom of each of the first grouting holes is 50cm-200cm lower than the bottom plate of the oil storage chamber. This design ensures that the bottom of the first grouting hole is lower than the bottom plate of the oil storage chamber by a certain margin, which is to ensure that the grouting material can be smoothly injected into deeper rock strata through the bottom of the first grouting hole, thus achieving a better water-stopping effect.

[0008] Preferably, the distance between two adjacent first grouting holes on the side of the oil storage chamber facing the water is smaller than the distance between two adjacent first grouting holes at other locations in the oil storage chamber.

[0009] This is because the rock strata facing the water area in the oil storage chamber have relatively higher groundwater seepage pressure. To effectively address this, the spacing of the first grouting holes on that side is made denser. This creates a more continuous and dense water-stopping curtain during grouting, resulting in a better water-stopping effect. For other locations in the oil storage chamber, where the groundwater seepage pressure is relatively low, the spacing of the first grouting holes can be appropriately widened while still meeting water-stopping requirements. This reduces the number of first grouting holes needed, thereby saving construction costs.

[0010] Preferably, a row of second grouting holes is provided on the side of the oil storage chamber facing the water area. These second grouting holes are located on the side of the first grouting holes away from the oil storage chamber. The top of each second grouting hole is connected to the water curtain tunnel. The bottom depth of each second grouting hole is the same as the bottom depth of the first grouting hole. Grouting material is injected into the second grouting holes. In this design, the top of each second grouting hole is connected to the water curtain tunnel, allowing grouting operations to be performed within the water curtain tunnel. The second grouting holes are used to construct grouting channels in the rock strata on the side of the oil storage chamber facing the water area. Combined with the grouting material, this forms a second water-stopping curtain, further reducing the groundwater seepage pressure in the rock strata on the side of the oil storage chamber facing the water area, resulting in a better water-stopping effect.

[0011] Preferably, the distance between the first grouting hole and the inner wall of the oil storage chamber is 8m-14m, and the angle α between the second grouting hole and the first grouting hole is 1°-3°. The distance between the first grouting hole and the inner wall of the oil storage chamber is defined as the minimum value among many distances from each point on the inner wall of the oil storage chamber to the first grouting hole.

[0012] Preferably, the first grouting holes and the second grouting holes are arranged alternately in the arrangement direction. In this scheme, the second grouting holes can effectively fill the weak area formed after the injection of grouting material into two adjacent first grouting holes, further enhancing the water-stopping effect of the rock strata on the side of the oil storage chamber facing the water area.

[0013] Preferably, an anchor bolt is installed on the inner wall of the oil storage chamber. One end of the anchor bolt is anchored within the shotcrete layer, and the other end is anchored within the corresponding rock stratum of the inner wall of the oil storage chamber. In this design, the anchor bolt effectively enhances the connection strength and stability between the shotcrete layer and the rock stratum of the inner wall of the oil storage chamber, making them form a more integrated and robust structural system.

[0014] The material in the shotcrete layer can be ordinary concrete or fiber-reinforced concrete.

[0015] Preferably, the sprayed concrete layer is made of fiber-reinforced concrete. In this design, the fiber component in the fiber-reinforced concrete effectively inhibits the propagation of micro-cracks within the concrete and disperses tensile stress, thereby significantly improving the tensile strength and crack resistance of the sprayed concrete layer. The fiber component in the fiber-reinforced concrete can be at least one of steel fibers and synthetic fibers.

[0016] The waterproof layer can be a modified bitumen membrane, a polyurethane waterproof coating, a cement-based penetrating crystalline waterproof material, or an epoxy bitumen coating.

[0017] Preferably, the waterproof layer comprises a waterproof membrane and an epoxy asphalt coating, wherein the epoxy asphalt coating is located between the waterproof membrane and the inner wall of the oil storage chamber. In this design, the epoxy asphalt coating possesses excellent permeability, effectively filling micro-cracks in the inner wall of the oil storage chamber, thereby forming a preliminary waterproof barrier to prevent moisture from seeping through these tiny gaps. The waterproof membrane is then laid on top of the epoxy asphalt coating. The waterproof membrane has good tensile properties; when the inner wall of the oil storage chamber cracks due to various factors (such as temperature changes, structural stress, etc.), the waterproof membrane can adapt to the deformation of the inner wall by virtue of its tensile strength, maintaining a tight bond with the substrate, thus effectively reducing water seepage problems caused by cracking of the inner wall.

[0018] The grouting material can be a cement-based grouting material, a polyurethane grouting material, or an acrylate grouting material. The cement-based grouting material is based on cement, with the addition of certain admixtures (such as water-reducing agents, early-strength agents, waterproofing agents, etc.), which are then mixed with water to form a slurry. The polyurethane grouting material is formulated using polyisocyanates and polyether resins as main raw materials, mixed with various admixtures. The acrylate grouting material is a two-component or multi-component homogeneous liquid grouting material made primarily of acrylate aqueous solutions, with the addition of appropriate amounts of crosslinking agents, accelerators, initiators, water, or modifiers.

[0019] Preferably, the grouting material is a cement-based grouting material. Compared to polyurethane grouting materials and acrylate grouting materials, the cement-based grouting material is less expensive and can save on construction costs.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a structure for an oil storage cavern. Through the synergistic effect of the waterproof layer, the first grouting hole, and the grouting material filled in the first grouting hole, the oil storage cavern can achieve good waterproof and water-stopping effects, significantly reducing the infiltration of groundwater from the inner wall of the oil storage cavern into the interior, and effectively ensuring the quality and safety of the stored oil. Attached Figure Description

[0021] Figure 1This is a cross-sectional schematic diagram of the structure of an oil storage cavern in Example 1.

[0022] Figure 2 for Figure 1 Cross-sectional view of section AA.

[0023] Marked in the image: 1-Water Curtain Channel 2-First grouting hole, 3-Second grouting hole, 4-Oil storage chamber, 401 - Waterproof layer, 402 - Shotcrete layer. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0025] Unless otherwise specified, the terms "upper," "lower," "left," "right," "center," "inner," and "outer" used in the description of specific embodiments of this utility model to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is usually placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, and for enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0026] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," "parallel," and "coaxial" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, parallel, or coaxial. Slight tilt or deviation is permissible, as long as it does not affect the normal function of the relevant component. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be perfectly horizontal; a slight tilt is acceptable. "Coaxial" means that two components are arranged as coaxially as possible, allowing them to move coaxially or approximately coaxially when their relative positions change. Alternatively, it can be simplified to mean that the corresponding device / component / element, when arranged in "horizontal," "vertical," "suspended," "parallel," or "coaxial" directions, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. For example, the deviation in the "coaxial" direction is controlled within 0.2-1mm, preferably within 0.2-0.5mm. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0027] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0028] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0029] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0030] Example 1 like Figure 1 and Figure 2 As shown, the structure of an oil storage cavern includes an oil storage chamber 4 and several first grouting holes 2.

[0031] The oil storage chamber 4 is located in the underground rock strata; the inner wall of the oil storage chamber 4 is provided with a waterproof layer 401, and the outer surface of the waterproof layer 401 is provided with a sprayed concrete layer 402. Specifically, the cross-section of the oil storage chamber 4 is a straight-walled circular arch or horseshoe shape. The inner wall of the oil storage chamber 4 includes the bottom surface, top surface, and surrounding sides of the oil storage chamber 4.

[0032] Several first grouting holes 2 are arranged around the oil storage chamber 4; the top of each first grouting hole 2 is connected to the water curtain tunnel 1 above the oil storage chamber 4, and the bottom of each first grouting hole 2 is lower than the bottom plate of the oil storage chamber 4. The axis of the water curtain tunnel 1 is consistent with the length direction of the oil storage chamber 4, and the water curtain tunnel 1 is located directly above the oil storage chamber 4.

[0033] Grouting material was injected into the first grouting hole 2.

[0034] In an optional embodiment, the bottom of each first grouting hole 2 can be 50cm-200cm lower than the bottom plate of the oil storage chamber 4, specifically 50cm, 60cm, 80cm, 100cm, 120cm, 150cm, 180cm, or 200cm.

[0035] In an optional embodiment, the spacing between two adjacent first grouting holes 2 on the side of the oil storage chamber 4 facing the water can be smaller than the spacing between two adjacent first grouting holes 2 at other locations in the oil storage chamber 4. Specifically, the spacing between two adjacent first grouting holes 2 on the side of the oil storage chamber 4 facing the water can be 1.5m-2.5m, while the spacing between two adjacent first grouting holes 2 at other locations in the oil storage chamber 4 can be 2m-3.5m.

[0036] In an optional embodiment, a row of second grouting holes 3 can be provided on the side of the oil storage chamber 4 facing the water area. The second grouting holes 3 are located on the side of the first grouting holes 2 away from the oil storage chamber 4. The top of each second grouting hole 3 is connected to the water curtain tunnel 1. The bottom depth of each second grouting hole 3 is consistent with the bottom depth of the first grouting hole 2. Grouting material is injected into the second grouting holes 3. Specifically, the spacing between two adjacent second grouting holes 3 can be 1.5m-2.5m.

[0037] In an optional embodiment, the distance between the first grouting hole 2 and the inner wall of the oil storage chamber 4 can be 8m-14m, specifically 8m, 9m, 10m, 11m, 12m, 13m, or 14m. The angle α between the second grouting hole 3 and the first grouting hole 2 can be 1°-3°, specifically 1°, 1.5°, 2°, 2.5°, or 3°.

[0038] The inclination angle of the first grouting hole 2 (i.e. the angle between it and the vertical plane) needs to be determined by taking into account the following factors: the vertical depth difference between the oil storage chamber 4 and the water curtain tunnel 1, the structural dimensions of the oil storage chamber 4 itself, and the distance between the first grouting hole 2 and the inner wall of the oil storage chamber 4.

[0039] In an optional embodiment, the first grouting hole 2 and the second grouting hole 3 can be arranged alternately in the arrangement direction.

[0040] In an optional embodiment, anchor bolts may be installed on the inner wall of the oil storage chamber 4. One end of the anchor bolt is anchored within the shotcrete layer 402, and the other end is anchored in the corresponding rock stratum of the inner wall of the oil storage chamber 4. The anchoring depth of the anchor bolts can be 40cm-100cm.

[0041] In an optional embodiment, the sprayed concrete layer 402 can be made of fiber-reinforced concrete. Specifically, the thickness of the sprayed concrete layer 402 can be 10cm-20cm.

[0042] In an optional embodiment, the waterproof layer 401 may include a waterproof membrane and an epoxy bitumen coating, wherein the epoxy bitumen coating is located between the waterproof membrane and the inner wall of the oil storage chamber 4. Specifically, the waterproof membrane may be a modified bitumen membrane or a thermoplastic polyolefin waterproof membrane. The thickness of the modified bitumen membrane may be 2mm, 3mm, 4mm, or 5mm, and the thickness of the thermoplastic polyolefin waterproof membrane may be 1.2mm, 1.5mm, 1.8mm, or 2mm. The thickness of the epoxy bitumen coating may be 150μm-200μm.

[0043] In an optional embodiment, the fiber-reinforced concrete may include steel fibers and polypropylene fibers. Specifically, the steel fibers may have a diameter of 0.3mm-0.8mm, a length of 20mm-35mm, and a dosage of 40kg / m³-80kg / m³. The polypropylene fibers may have a length of 12mm-19mm and a dosage of 0.8kg / m³-1.2kg / m³. In this embodiment, the steel fibers can significantly improve the crack resistance and impermeability of the shotcrete layer 402, while the polypropylene fibers can reduce plastic shrinkage cracks in the shotcrete layer 402.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A structure for an oil storage cavern, characterized in that, include: Oil storage chamber (4), wherein the oil storage chamber (4) is located in underground rock strata; The inner wall of the oil storage chamber (4) is provided with a waterproof layer (401), and the outer surface of the waterproof layer (401) is provided with a sprayed concrete layer (402). A plurality of first grouting holes (2) are arranged around the oil storage chamber (4); the top of each first grouting hole (2) is connected to the water curtain tunnel (1) above the oil storage chamber (4), and the bottom of each first grouting hole (2) is lower than the bottom plate of the oil storage chamber (4); Grouting material is injected into the first grouting hole (2).

2. The structure of an oil storage cavern according to claim 1, characterized in that, The bottom of each of the first grouting holes (2) is 50cm-200cm lower than the bottom plate of the oil storage chamber (4).

3. The structure of an oil storage cavern according to claim 1, characterized in that, The distance between two adjacent first grouting holes (2) on the side of the oil storage chamber (4) facing the water is smaller than the distance between two adjacent first grouting holes (2) at other locations of the oil storage chamber (4).

4. The structure of an oil storage cavern according to claim 1, characterized in that, A row of second grouting holes (3) is also provided on the side of the oil storage chamber (4) facing the water. The second grouting holes (3) are located on the side of the first grouting hole (2) away from the oil storage chamber (4). The top of each second grouting hole (3) is connected to the water curtain tunnel (1), and the bottom depth of each second grouting hole (3) is consistent with the bottom depth of the first grouting hole (2). Grouting material is injected into the second grouting hole (3).

5. The structure of an oil storage cavern according to claim 4, characterized in that, The distance between the first grouting hole (2) and the inner wall of the oil storage chamber (4) is 8m-14m, and the angle α between the second grouting hole (3) and the first grouting hole (2) is 1°-3°.

6. The structure of an oil storage cavern according to claim 4, characterized in that, The first grouting hole (2) and the second grouting hole (3) are arranged alternately in the arrangement direction.

7. The structure of an oil storage cavern according to any one of claims 1-6, characterized in that, An anchor rod is provided on the inner wall of the oil storage chamber (4). One end of the anchor rod is anchored in the sprayed concrete layer (402), and the other end of the anchor rod is anchored in the rock layer corresponding to the inner wall of the oil storage chamber (4).

8. The structure of an oil storage cavern according to claim 7, characterized in that, The sprayed concrete layer (402) is made of fiber-reinforced concrete.

9. The structure of an oil storage cavern according to claim 7, characterized in that, The waterproof layer (401) includes a waterproof membrane and an epoxy bitumen coating, wherein the epoxy bitumen coating is located between the waterproof membrane and the inner wall of the oil storage chamber (4).

10. The structure of an oil storage cavern according to claim 7, characterized in that, The grouting material is a cement-based grouting material.

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