Water-sealed tunnel sealing plugs and underground water-sealed tunnel sealing structures

Abstract

This invention provides a sealing plug for a water-sealed cavern tunnel and a sealing structure for an underground water-sealed cavern. The sealing plug includes a columnar sealing plug body with an arc-shaped protrusion along its circumference on its side. The protrusion of the arc-shaped protrusion gradually decreases from the middle of the sealing plug body towards both ends. A manhole is provided within the sealing plug body, and a limiting structure is fixed to the inner wall of one end of the manhole. A sealing plate and a post-cast body are located within the manhole. One end of the post-cast body abuts against one side of the sealing plate, and the other side of the sealing plate abuts against the limiting structure. Using this invention, the arc-shaped protrusion is embedded in a groove pre-excavated in the inner wall of the tunnel, reducing the shear force on the interface between the sealing plug body and the tunnel, resulting in a high bonding strength and preventing through-cracks that could cause oil leakage. Furthermore, the limiting structure constrains and positions the sealing plate, facilitating the construction of the post-cast body.

Description

Technical Field

[0001] This utility model relates to the field of underground water-sealed cavern technology, specifically to a sealing plug for a water-sealed cavern tunnel and a sealing structure for an underground water-sealed cavern. Background Technology

[0002] Underground water-sealed cavern oil depots are underground oil storage facilities built based on the principle of water sealing. Compared to surface storage tanks, they offer advantages such as lower construction costs, reduced steel consumption, higher safety, and longer service life, and have gradually become a key development method for large-scale oil storage. The tunnels serve as the access points for the construction of water-sealed caverns. To prevent oil and gas leaks and water seepage into the depot, the tunnels must be sealed upon completion of construction to ensure the cavern's airtightness.

[0003] Existing water-sealed tunnels typically use cylindrical sealing plugs for sealing. These plugs are made of cast concrete. To ensure the access of construction equipment and materials, and to facilitate the removal of waste materials after construction, a manhole is pre-installed in the center of the sealing plug during construction, and then the manhole is filled with concrete later. However, the time interval between the sealing plug's formation and the tunnel sidewall's formation is large, and slight deformation occurs during the sealing plug's formation and curing process. Furthermore, the static pressure exerted on the sealing plug during subsequent work is extremely high. All of these factors can cause penetrating cracks at the interface between the sealing plug and the tunnel sidewall, leading to oil leaks. This not only wastes energy but also causes incalculable environmental pollution to the surrounding soil and water sources.

[0004] Furthermore, the inconvenience of frequent personnel entry and exit during manhole construction makes the formwork construction inside the manhole difficult, compromising the formwork's sealing and increasing the risk of concrete leakage during subsequent pours. Additionally, the formwork and other materials from the manhole cannot be removed from the tunnel after construction. For example, patent document CN202431280U provides a water-sealed tunnel sealing device that improves sealing by chiseling grooves in the tunnel's inner wall to embed a sealing plug into the tunnel's sidewall. However, this solution does not solve the problem of difficult manhole construction. Utility Model Content

[0005] To solve at least one of the above technical problems, this utility model provides a water-sealed tunnel sealing plug and an underground water-sealed tunnel sealing structure.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: This utility model provides a water-sealed tunnel sealing plug, including a columnar sealing plug body. The side of the sealing plug body has an arc-shaped protrusion along its circumference, and the protrusion of the arc-shaped protrusion gradually decreases from the middle of the sealing plug body to both ends. The sealing plug body has a manhole, and a limiting structure is fixed on the inner wall of one end of the manhole. A sealing plate and a post-cast body are provided in the manhole. One end of the post-cast body abuts against one side of the sealing plate, and the other side of the sealing plate abuts against the limiting structure.

[0007] The beneficial effects of this utility model are: This invention utilizes an arc-shaped protrusion design on the side of the sealing plug body, increasing the contact area and strength between the sealing plug body and the roadway. During construction, the arc-shaped protrusion is embedded in a pre-cut groove in the inner wall of the roadway, significantly reducing the shear force on the contact surface between the sealing plug body and the roadway. This also prevents stress concentration caused by sharp structures on the contact surface, avoiding through cracks that could lead to oil leakage. Furthermore, the sealing plate is constrained and positioned by a limiting structure, ensuring good sealing performance and facilitating the pouring of concrete after construction. This prevents concrete leakage during the pouring of concrete and avoids the formation of unremovable and uncleanable template residue, ensuring the cleanliness of the roadway after construction.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the arc-shaped protrusion extends to both ends of the sealing plug body.

[0010] This facilitates a greater bonding area and strength between the sealing plug body and the roadway, while reducing the length of the sealing plug body required for sealing.

[0011] Furthermore, the limiting structure is an annular step and its outer ring side is fixedly connected to the sealing plug body.

[0012] This arrangement allows the sealing plate to be positioned so that one edge fits snugly against the limiting structure, ensuring good sealing and preventing concrete leakage.

[0013] Furthermore, the limiting structure is integrally formed and connected with the sealing plug body.

[0014] The limiting structure is cast simultaneously with the sealing plug body, eliminating the need for subsequent fixing of the limiting structure to the sealing plug body. This results in high construction efficiency and greater strength between the limiting structure and the sealing plug body.

[0015] Furthermore, one side of the limiting structure is coplanar with one end of the sealing plug body, and a steel reinforcement skeleton is provided inside the limiting structure, extending into the sealing plug body.

[0016] The limiting structure and the sealing plug body have a smooth transition, which facilitates pouring and allows the subsequent pouring to fully fill the manhole. The steel reinforcement skeleton improves the strength of the limiting structure and prevents it from cracking under pressure during the construction of the subsequent pouring.

[0017] Furthermore, the sealing plate includes two coplanar and spaced-apart crescent-shaped plates, with a strip plate between the two crescent-shaped plates. The sides of the two crescent-shaped plates that are far apart from each other are arc-shaped, and the two ends of the strip plate are arc-shaped. The strip plate and the two crescent-shaped plates together form a circular sealing plate.

[0018] During assembly, the width of the strip plate and the crescent plate is much smaller than the width of the manhole, making it easy to pass through the manhole; the strip plate and the two crescent plates together form a circular sealing plate, which can effectively seal the manhole and prevent concrete leakage from the later-cast part.

[0019] Furthermore, the inner wall of the manhole is provided with multiple reinforcing grooves, and the side of the post-cast body is provided with a protruding structure, which is embedded in the reinforcing groove.

[0020] By reinforcing the groove, the bonding strength between the post-cast body and the manhole inner wall is increased, and the shear force at the bonding surface between the post-cast body and the manhole inner wall is reduced under pressure, thus avoiding the generation of through cracks and improving the sealing performance.

[0021] Furthermore, both the reinforcing groove and the protrusion are annular and extend along the inner circumference of the manhole.

[0022] The post-cast structure experiences uniform stress on its periphery, preventing stress concentration that could lead to cracks.

[0023] Furthermore, one of the reinforcing grooves has a sidewall that is coplanar with one side of the sealing plate.

[0024] This avoids the interface between the post-cast body and the manhole being directly connected to the gap at the edge of the sealing plate, thus preventing the corrosive effects of the medium and static pressure from directly acting on the interface. At the same time, during the construction of the post-cast body, it is easier for concrete to enter the gap at the edge of the sealing plate, achieving a bond between the sealing plate and the manhole sidewall, thereby improving strength.

[0025] This utility model provides a sealing structure for underground water-sealed caverns, based on the aforementioned water-sealed cavern tunnel sealing plug; it includes a tunnel body, and an arc-shaped groove with a shape matching the arc-shaped protrusion is provided on the side wall of the tunnel body, and the surface of the arc-shaped protrusion is fixedly connected to the inner wall of the arc-shaped groove.

[0026] The sealing plug has a large contact area and strength with the roadway. At the same time, the arc-shaped protrusion is embedded in the arc-shaped groove pre-cut in the inner wall of the roadway, which greatly reduces the shear force on the contact surface between the sealing plug and the roadway during operation. It also avoids stress concentration caused by sharp structures on the contact surface and avoids oil leakage caused by through cracks on the contact surface. In addition, the cleanliness of the roadway is good after construction. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the underground water-sealed cavern sealing plug of this utility model.

[0028] Figure 2 for Figure 1 The left view.

[0029] Figure 3 This is a schematic diagram of the underground water-sealed cavern sealing structure of this utility model.

[0030] Figure 4 A schematic diagram of the manhole structure before pouring concrete for the sealing structure of the underground water-sealed cavern.

[0031] Figure 5 for Figure 3 A sectional view along line AA.

[0032] In the accompanying drawings, the technical features represented by each reference numeral are as follows: 1-Sealing plug body; 2-Manhole; 3-Limiting structure; 4-Sealing plate; 41-Crescent plate; 42-Strip plate; 5-Post-cast body; 6-Arch-shaped protrusion; 7-Reinforcing groove; 8-Tunnel body. Detailed Implementation

[0033] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0034] This utility model refers to Figures 1-5 .

[0035] Example 1, as Figures 1-2 As shown: This utility model provides a water-sealed tunnel sealing plug, including a columnar sealing plug body 1. The side of the sealing plug body 1 is provided with an arc-shaped protrusion 6 along its circumference. The protrusion of the arc-shaped protrusion 6 gradually decreases from the middle of the sealing plug body 1 to its two ends. The sealing plug body 1 is provided with a manhole 2. A limiting structure 3 is fixed on the inner wall of one end of the manhole 2. A sealing plate 4 and a post-cast body 5 are provided in the manhole 2. One end of the post-cast body 5 abuts against one side of the sealing plate 4, and the other side of the sealing plate 4 abuts against the limiting structure 3.

[0036] principle: During installation, the sealing plug for the underground water-sealed cavern is placed inside the cavern. First, an arc-shaped groove is excavated into the inner wall of the cavern to form the arc-shaped protrusion 6. Then, the sealing plug body 1 is integrally cast, leaving the manhole 2 intact. During casting, the concrete on the outer ring side enters the arc-shaped groove to form the arc-shaped protrusion 6, while the inner concrete forms the central columnar structure of the sealing plug body 1. After the sealing plug body 1 is formed and cured, personnel and tools can be evacuated through the manhole 2, and debris inside the cavern can be cleaned. Finally, the sealing plate 4 is placed into the manhole 2 and abuts against the limiting structure 3, sealing the inward end of the manhole 2 with the sealing plate 4. Then, the post-cast body 5 is constructed. After the post-cast body 5 is cast and formed, the cavern is completely sealed.

[0037] Note: The outer shape of the sealing plug body 1 matches the tunnel. For example, if the tunnel is arch-shaped, the sealing plug body 1 is also arch-shaped.

[0038] By employing this utility model, the side of the sealing plug body 1 is designed with an arc-shaped protrusion 6, which increases the bonding area and strength between the sealing plug body 1 and the roadway. During construction, the arc-shaped protrusion 6 is embedded in the groove pre-cut in the inner wall of the roadway, which greatly reduces the shear force on the bonding surface between the sealing plug body 1 and the roadway during operation, and avoids stress concentration caused by sharp structures on the bonding surface, thus preventing oil leakage caused by through cracks on the bonding surface. In addition, the sealing plate 4 is constrained and positioned by the limiting structure 3, which has good sealing performance, facilitates the pouring of the body 5 after construction, avoids concrete leakage during the construction of the pouring body 5, and does not produce template residue that cannot be removed and cleaned, thus ensuring the cleanliness of the roadway after construction.

[0039] Furthermore, the arc-shaped protrusion 6 extends to both sides of the sealing plug body 1.

[0040] Note: When viewed from the side, the sealing plug body 1 is elliptical in shape.

[0041] This facilitates a greater bonding area and strength between the sealing plug body 1 and the roadway, while reducing the length of the sealing plug body 1 required for sealing.

[0042] Furthermore, the limiting structure 3 is an annular step and its outer ring side is fixedly connected to the sealing plug body 1.

[0043] This arrangement allows the edge of the sealing plate 4 to be tightly fitted to the limiting structure 3, ensuring good sealing and preventing concrete leakage.

[0044] Furthermore, the limiting structure 3 is integrally formed and connected with the sealing plug body 1.

[0045] The limiting structure 3 is cast simultaneously with the sealing plug body 1, eliminating the need for subsequent fixing of the limiting structure 3 to the sealing plug body 1. This results in high construction efficiency and greater strength between the limiting structure 3 and the sealing plug body 1.

[0046] Furthermore, one side of the limiting structure 3 is coplanar with one end of the sealing plug body 1, and a steel reinforcement skeleton is provided inside the limiting structure 3, which extends into the sealing plug body 1.

[0047] The limiting structure 3 and the sealing plug body 1 have a smooth transition, which facilitates casting and allows the post-cast body 5 to fully fill the manhole 2. The steel reinforcement skeleton improves the strength of the limiting structure 3 and prevents the limiting structure 3 from cracking under pressure during the construction of the post-cast body 5.

[0048] Furthermore, the sealing plate 4 includes two coplanar and spaced-apart crescent-shaped plates 41, with a strip plate 42 between the two crescent-shaped plates 41. The sides of the two crescent-shaped plates 41 that are far apart from each other are arc-shaped, and the two ends of the strip plate 42 are arc-shaped. The strip plate 42 and the two crescent-shaped plates 41 together form a circular sealing plate 4.

[0049] Note: Manhole 2 is circular. In addition, depending on the size of manhole 2, one or more strip plates 42 may be provided.

[0050] During assembly, the width of the strip plate 42 and the crescent plate 41 is much smaller than the width of the manhole 2, making it easy to pass through the manhole 2; the strip plate 42 and the two crescent plates 41 together form a circular sealing plate 4, which can effectively seal the manhole 2 and prevent concrete leakage from the post-cast body 5.

[0051] Furthermore, the inner wall of the manhole 2 is provided with a plurality of reinforcing grooves 7, and the side of the post-cast body 5 is provided with a protruding structure, which is embedded in the reinforcing grooves 7.

[0052] By reinforcing the groove 7, the bonding strength between the post-cast body 5 and the inner wall of the manhole 2 is increased, and the shear force at the bonding surface between the post-cast body 5 and the inner wall of the manhole 2 is reduced when under pressure, thus avoiding the generation of through cracks and improving the sealing performance.

[0053] Furthermore, both the reinforcing groove 7 and the protrusion structure are annular and extend along the inner circumference of the manhole 2.

[0054] The post-cast structure experiences uniform stress on all five sides, preventing stress concentration that could lead to cracks.

[0055] Furthermore, one of the reinforcing grooves 7 has a sidewall that is coplanar with one side of the sealing plate 4.

[0056] This avoids the interface between the post-cast body 5 and the manhole 2 being directly connected to the gap at the edge of the sealing plate 4, thus preventing the corrosive effects of the medium and static pressure from directly acting on the interface. At the same time, during the construction of the post-cast body 5, it is easier for concrete to enter the gap at the edge of the sealing plate 4, achieving the bonding between the sealing plate 4 and the sidewall of the manhole 2, thereby improving the strength.

[0057] Example 2, as Figures 3-5As shown: This utility model provides a sealing structure for underground water-sealed caverns, based on the aforementioned water-sealed cavern tunnel sealing plug; it includes a tunnel body 8, and an arc-shaped groove with a shape matching the arc-shaped protrusion 6 is provided on the side wall of the tunnel body 8, and the surface of the arc-shaped protrusion 6 is fixedly connected to the inner wall of the arc-shaped groove.

[0058] Note: By casting the sealing plug body 1 inside the tunnel body 8, the surface of the arc-shaped protrusion 6 and the inner wall of the arc-shaped groove are bonded and fixed with concrete.

[0059] The sealing plug body 1 has a large contact area and strength with the roadway. At the same time, the arc-shaped protrusion 6 is embedded in the arc-shaped groove pre-cut in the inner wall of the roadway, which greatly reduces the shear force on the contact surface between the sealing plug body 1 and the roadway during operation. It also avoids stress concentration caused by sharp structures on the contact surface and avoids oil leakage caused by through cracks on the contact surface. In addition, the cleanliness of the roadway is good after construction.

[0060] In the description of this utility model, it should be understood that if descriptive terms indicating orientation, direction, or positional relationship appear, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc., the orientation or positional relationship indicated in this specification is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of understanding this utility model and simplifying the description, and does not indicate or imply that the part, element, or whole referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0061] Furthermore, if sequential descriptive terms such as "first," "second," etc., appear, their purpose in this specification is for ease of understanding or simplification. For example, to distinguish multiple technical features of the same type or function, which must be mentioned separately, this specification may use prefixes or suffixes to differentiate them. Therefore, they should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first," "second," etc., may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0062] In this utility model, if descriptive terms describing structural relationships are used, such as "installation," "connection," "joining," and "fixing," they should be interpreted broadly unless otherwise explicitly specified and limited. For example, "installation," "connection," and "joining" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. "Fixing" can refer to an integral fixation or a detachable fixation using fasteners; it can be a direct fixation or a fixation through an intermediate medium. For those skilled in the art, the specific meaning of the above descriptive terms in this utility model can be understood based on the specific circumstances, the context, and the coherence of the preceding and following text.

[0063] In this utility model, if descriptive terms containing subordinate or connecting meanings appear, such as "above" or "below" the second feature, they should not be interpreted restrictively unless otherwise explicitly specified and limited. For example, "above" or "below" can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. For those skilled in the art, the specific meaning of the above descriptive terms in this utility model can be understood according to the specific circumstances, the context, and the coherence of the preceding and following text.

[0064] Furthermore, "above," "on top of," and "above" the first feature in relation to the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0065] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments, examples, and features described in this specification, and such combinations or integrations should all fall within the scope of the present invention.

[0066] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Variations, modifications, substitutions, and modifications made by those skilled in the art to the above embodiments within the scope of information available through public channels and in conjunction with the technical teachings given in this application are still covered within the protection scope of this application.

Claims

1. A sealing plug for a water-sealed tunnel, characterized in that: The sealing plug body (1) is columnar in shape. The side of the sealing plug body (1) is provided with an arc-shaped protrusion (6) along its circumference. The protrusion of the arc-shaped protrusion (6) gradually decreases from the middle of the sealing plug body (1) to both ends. The sealing plug body (1) is provided with a manhole (2). A limiting structure (3) is fixed on the inner wall of one end of the manhole (2). A sealing plate (4) and a post-cast body (5) are provided in the manhole (2). One end of the post-cast body (5) abuts against one side of the sealing plate (4), and the other side of the sealing plate (4) abuts against the limiting structure (3).

2. The water-sealed tunnel sealing plug according to claim 1, characterized in that: The arc-shaped protrusion (6) extends to both sides of the sealing plug body (1).

3. The water-sealed tunnel sealing plug according to claim 1, characterized in that: The limiting structure (3) is an annular step and its outer ring side is fixedly connected to the sealing plug body (1).

4. The water-sealed tunnel sealing plug according to claim 3, characterized in that: The limiting structure (3) is integrally formed and connected with the sealing plug body (1).

5. The water-sealed tunnel sealing plug according to claim 3, characterized in that: One side of the limiting structure (3) is coplanar with one end of the sealing plug body (1), and a steel reinforcement skeleton is provided inside the limiting structure (3), which extends into the sealing plug body (1).

6. The water-sealed tunnel sealing plug according to claim 1, characterized in that: The sealing plate (4) includes two coplanar and spaced-apart crescent-shaped plates (41), with a strip plate (42) between the two crescent-shaped plates (41). The two crescent-shaped plates (41) are arc-shaped on the opposite side, and the two ends of the strip plate (42) are arc-shaped. The strip plate (42) and the two crescent-shaped plates (41) together form a circular sealing plate (4).

7. The water-sealed tunnel sealing plug according to claim 1, characterized in that: The inner wall of the manhole (2) is also provided with multiple reinforcing grooves (7), and the side of the post-cast body (5) is provided with a protruding structure, which is embedded in the reinforcing groove (7).

8. The water-sealed tunnel sealing plug according to claim 7, characterized in that: The reinforcing groove (7) and the protrusion structure are both annular and extend along the inner circumference of the manhole (2).

9. The water-sealed tunnel sealing plug according to claim 8, characterized in that: One of the reinforcing grooves (7) has a sidewall that is coplanar with one side of the sealing plate (4).

10. A sealing structure for an underground water-sealed cavern, characterized in that: The sealing plug for the water-sealed tunnel is based on any one of claims 1-9; it includes a tunnel body (8), and an arc groove with a shape matching the arc protrusion (6) is provided on the side wall of the tunnel body (8), and the surface of the arc protrusion (6) is fixedly connected to the inner wall of the arc groove.

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