Freezing shaft outer wall connecting water-stop belt

Abstract

The invention discloses a freezing shaft outer wall connecting waterstop which comprises a first waterstop web and a second waterstop web, and the first waterstop web and the second waterstop web are connected through a movable part. The upper and lower adjacent outer wall sections are respectively an upper outer wall section and a lower outer wall section; when the upper outer wall is subjected to segmented pouring, the first water stop web is preset in the upper pouring space, and the second water stop web is retracted into the segmented pouring space of the upper outer wall through a movable part; and when the lower outer wall is subjected to segmented pouring, the second water stop web extends out of the upper pouring space through the movable part and enters the lower pouring space. The first water stop web and the second water stop web are connected through the movable component, the second water stop web can be adjacently retracted into the pouring space when the upper outer well wall is poured in a segmented mode, the second water stop web extends out and is fixedly embedded into the pouring space when the lower outer well wall is poured in a segmented mode, and a joint gap is effectively blocked.

Description

Technical Field

[0001] This invention relates to the field of mine shaft construction technology. Specifically, it relates to a frozen waterstop strip for the joint of the outer wall of a mine shaft. Background Technology

[0002] The outer wall of the frozen well was constructed using a reverse construction method, meaning it was excavated and built from top to bottom. During the pouring of the lower outer wall section, it was difficult to achieve a tight seal with the upper outer wall section, resulting in gaps at the joint between the upper and lower outer wall sections that could not be filled. After the frozen wall thaws, these gaps become water-filled channels, allowing water to seep between the inner and outer walls through the joints, ultimately causing leakage.

[0003] Because the well wall was designed to withstand freezing pressure on the outer wall and full water pressure on the inner wall, water-stopping measures were largely abandoned during the construction of the outer wall. The problem of water filling between the walls and leakage was addressed solely by improving the quality of the inner wall concrete and grouting between the walls. However, it has been proven that addressing the source of leakage is the ultimate solution.

[0004] In recent years, joint water-stopping technology for well walls has received increasing attention. This includes methods such as installing water-stop steel plates at the joint, pre-embedding grouting pipes for subsequent joint grouting, or using both methods simultaneously. However, this technology also presents several challenges during construction. For instance, the installation of water-stop steel plates presents difficulties in positioning and welding within the well. The formwork for pouring concrete needs optimization and modification at the water-stop steel plate location to facilitate subsequent welding. During concrete pouring, the obstruction of the water-stop steel plate exacerbates the difficulty of filling the space behind it. Furthermore, with subsequent joint grouting, the bonding effect between the grout and the well wall is difficult to guarantee after the well wall concrete has solidified, and the grout diffusion effect is also challenging. Additionally, the need to reserve grouting ports or channels further increases the construction difficulty. Therefore, finding an efficient and easy-to-construct water-stopping technology that effectively solves joint leakage problems remains a widely discussed area within the industry. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to provide a water-stop strip for the joint of the outer wall of the frozen well, which can effectively solve the problem of water leakage at the joint of the outer well wall. It does not require modification of the existing construction methods and construction structure, nor does it require the use of ground cranes to assist in the positioning and welding of steel plates. It can be carried out conveniently and efficiently using the existing construction methods.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a water-stop strip for the joint of the outer wall of a frozen well shaft, comprising a first water-stop web and a second water-stop web, the first water-stop web and the second water-stop web being connected by a movable component; two adjacent outer wall segments are respectively the upper outer wall segment and the lower outer wall segment; when the upper outer wall segment is poured: the first water-stop web is pre-set in the pouring space of the upper outer wall segment, and the second water-stop web is retracted into the pouring space of the upper outer wall segment through the movable component; when the lower outer wall segment is poured: the second water-stop web extends from the pouring space of the upper outer wall segment and enters the pouring space of the lower outer wall segment through the movable component.

[0007] The aforementioned type of frozen well casing joint waterstop has a pre-set placement cavity in the segmented pouring space of the upper outer wall that can accommodate the second waterstop web; or the first waterstop web has a placement cavity that can accommodate the second waterstop web; the placement cavity prevents the concrete from contacting or partially contacting the second waterstop web.

[0008] The aforementioned frozen well casing outer wall joint waterstop has a placement cavity with an opening communicating with the lower outer wall segment casting space. The second waterstop web extends from the placement cavity through the opening and enters the lower outer wall segment casting space.

[0009] In the above-mentioned frozen well casing outer wall joint waterstop, when the outer wall is poured in sections, the pouring template seals the opening of the placement cavity.

[0010] The aforementioned type of waterstop for the joint of the outer wall of a frozen well shaft, wherein the second waterstop web is inserted into the placement cavity and then fixed in the placement cavity by a temporary fixing component.

[0011] The aforementioned frozen well casing outer wall joint waterstop, when the outer wall is poured in sections: has a sealing shielding component between the first waterstop web and the pouring template, the shielding component forming a placement cavity between the first waterstop web and the pouring template.

[0012] The aforementioned waterstop strip for the joint of the outer wall of a frozen well shaft includes an upper shielding flange and a lower shielding block. The first waterstop web is arranged along a direction parallel to the center line of the well shaft. The lower shielding block is connected to the lower part of the first waterstop web. The upper shielding flange is connected to the side of the upper shielding flange adjacent to the casting template. The upper shielding flange is tightly fitted to the side wall of the casting template. The lower shielding block is tightly fitted to the bottom of the casting template. The space enclosed by the upper shielding flange, the lower shielding block, the first waterstop web, and the casting template is a placement cavity.

[0013] In the aforementioned frozen well casing joint waterstop, the end of the second waterstop web is connected to the movable component, and the second waterstop web swings relative to the first waterstop web in a direction close to or away from the first waterstop web via the movable component at the end; the second waterstop web is retracted into the placement cavity via the swinging of the movable component.

[0014] The aforementioned frozen well casing joint waterstop strip has the movable component arranged along the length direction of the first waterstop web or the second waterstop web. The first waterstop web is slidably sealed to the first waterstop web through the movable component, and the second waterstop web is slidably retracted into the placement cavity.

[0015] In the aforementioned frozen well casing joint waterstop, the second waterstop web is partially or entirely flexible in the length direction, the flexible portion of the second waterstop web forms a movable component, and the second waterstop web is folded into the placement cavity through the flexible portion.

[0016] The technical solution of the present invention achieves the following beneficial technical effects:

[0017] By using movable components to connect the first and second water-stopping webs, the second water-stopping web can be retracted into the pouring space during the segmented pouring of the upper outer well wall. When the segmented pouring of the lower outer well wall is carried out, the second water-stopping web extends out and is embedded in the pouring space, effectively blocking the joint gaps and achieving the effect of water blocking. Moreover, this structure is ingeniously designed, requiring no additional construction technology or equipment, and is perfectly integrated into the existing construction technology, making construction convenient and efficient. Attached Figure Description

[0018] Figure 1 A partial transverse cross-sectional schematic diagram of the unfolded joint waterstop of the present invention;

[0019] Figure 2 A schematic diagram of a partial transverse cross section of the shrinkage of the second water-stop web of the joint water-stop strip of the present invention;

[0020] Figure 3 A schematic diagram of the joint waterstop strip of the present invention being cast in sections on the upper outer wall;

[0021] Figure 4 A schematic diagram showing the completion of the lower well casing excavation after the upper outer wall of this invention has been poured in sections;

[0022] Figure 5 A schematic diagram illustrating the process of casting the lower outer wall in segments after the upper outer wall has been cast in segments according to the present invention;

[0023] Figure 6 The schematic diagram shows the joint waterstop strips of the present invention arranged in the upper outer wall segment and the lower outer wall segment respectively.

[0024] Figure 7 A schematic diagram of the segmented joint seam of the upper and lower outer walls in the prior art.

[0025] The reference numerals in the figure are as follows: 1-First waterstop web; 2-Second waterstop web; 3-Moving part; 4-Placement cavity; 5-Supporting steel plate; 6-Lower shielding block; 7-Upper shielding flange; 8-Fixing flange; 9-Fixing protrusion; 10-Outer wall segment; 11-Reinforcing bar; 12-Pouring template; 13-Pouring port. Detailed Implementation

[0026] In this embodiment, a waterstop strip for the joint of the outer wall of a frozen well shaft is provided, such as... Figure 1-2 As shown, it includes a first water-stopping web 1 and a second water-stopping web 2, which are connected by a movable part 3; Figure 3 , Figure 5 As shown, the two adjacent outer wall segments 10 are the upper outer wall segment 10 and the lower outer wall segment 10, respectively. During the casting of the upper outer wall segment 10: the first water-stopping web 1 is pre-installed within the casting space of the upper outer wall segment 10, and the second water-stopping web 2 is retracted into the casting space of the upper outer wall segment 10 via the movable component 3. During the casting of the lower outer wall segment 10: the second water-stopping web 2 extends from the casting space of the upper outer wall segment 10 and enters the casting space of the lower outer wall segment 10 via the movable component 3. In actual casting, the second water-stopping web 2 is first pre-installed in a non-expanded state and prefabricated together with the first water-stopping web 1 within the casting space of the upper outer wall segment 10.

[0027] Both the first water-stopping web 1 and the second water-stopping web 2 are annular. In order to further improve the sealing and water-blocking effect and the embedding effect, a supporting steel plate 5 is built into the first water-stopping web 1 along its length. The supporting steel plate 5 has through holes to improve the connection effect of the materials on both sides. A T-shaped embedding flange 8 is provided on the side of the first water-stopping web 1 away from the center of the well. Embedding flanges 9 are provided on both sides of the first water-stopping web 1 and both sides of the second water-stopping web 2 to improve the embedding effect and sealing and water-blocking performance.

[0028] like Figure 4 As shown, the upper outer wall segment 10 has a pre-set placement cavity 4 that can accommodate the second water-stop web 2 in the pouring space. In specific settings, a temporary space can be built in the pouring space by means of a baffle to prevent concrete from entering the temporary space and to prevent the concrete from contacting the second water-stop web 2; or a placement cavity 4 that can accommodate the second water-stop web 2 can be designed on the first water-stop web 1.

[0029] In this embodiment, a corresponding structure is set on the first water-stopping web 1 to form a placement cavity 4, and the placement cavity 4 prevents the concrete from contacting or partially contacting the second water-stopping web 2.

[0030] like Figure 4-5 As shown, the placement cavity 4 has an opening that communicates with the casting space of the lower outer wall segment 10. During the casting of the upper outer wall segment 10: the casting template 12 seals the opening of the placement cavity 4; after the upper casting template is removed, the opening of the placement cavity 4 is exposed, and the second water-stopping web 2 extends out of the placement cavity 4 through the opening and enters the casting space of the lower outer wall segment 10; after the second water-stopping web 2 is retracted into the placement cavity 4, it is fixed in the placement cavity 4 by a temporary fixing component. In this embodiment, the temporary fixing component is glue. The glue is used to temporarily fix the second water-stopping web 2 in the placement cavity 4 to ensure that the second water-stopping web 2 will not automatically pop out after the upper casting template is removed.

[0031] like Figure 2-3 As shown, during the casting of the outer wall segment 10: a shielding component is provided between the first water-stopping web 1 and the casting template 12 for sealing connection. The shielding component forms a placement cavity 4 between the first water-stopping web 1 and the casting template 12. Specifically, the shielding component includes an upper shielding flange 7 and a lower shielding block 6. The first water-stopping web 1 is arranged along a direction parallel to the center line of the well shaft. The lower shielding block 6 is connected to the lower part of the first water-stopping web 1. The upper shielding flange 7 is connected to the side of the upper shielding flange 7 adjacent to the casting template 12. The upper shielding flange 7 is tightly fitted to the side wall of the casting template 12. The lower shielding block 6 is tightly fitted to the bottom of the casting template 12. The space enclosed by the upper shielding flange 7, the lower shielding block 6, the first water-stopping web 1, and the casting template 12 is the placement cavity 4.

[0032] In this embodiment, the second water-stopping web 2 is made of rubber and is partially or completely flexible in the length direction. The second water-stopping web 2 is integrally formed, and the movable part 3 is the flexible part of the second water-stopping web 2. The second water-stopping web 2 swings, folds or rolls up relative to the first water-stopping web 1 through the flexible part and enters or extends out of the placement cavity 4.

[0033] In other embodiments, the movable component 3 is an independent, bendable, swingable component, such as a hinge. One end of the second water-stopping web 2 is connected to the first water-stopping web 1 via the hinge. The hinge is covered with rubber or other sealing material and is sealed to the first water-stopping web 1 and the second water-stopping web 2. The second water-stopping web 2 swings relative to the first water-stopping web 1 in a direction that approaches or moves away from the first water-stopping web 1 via the hinge. The second water-stopping web 2 swings through the movable component 3 and retracts or extends into the placement cavity 4.

[0034] In other embodiments, the movable component 3 may also adopt a sliding structure, such as a matching groove and a slider. The sliding structure is arranged on the first water-stopping web 1, along the length direction of the first water-stopping web 1 or the length direction of the second water-stopping web 2. A portion of the second water-stopping web 2 is connected to the first water-stopping web 1 through the sliding structure. The sliding structure has a limiting and sealing structure. The first water-stopping web 1 is slidably and sealingly engaged with the first water-stopping web 1 through the movable component 3. The second water-stopping web 2 is slidably retracted into the placement cavity 4 or slid out of the placement cavity 4 through the sliding structure.

[0035] In application, the second water-stopping web 2 is first bent and folded into the placement cavity 4, and the free end of the second water-stopping web 2 is temporarily fixed to the upper shielding flange 7 with glue. The joint water-stop is placed into the pouring space and contacts the pouring template. The placement cavity 4 is formed below the upper shielding flange 7 to prevent concrete from contacting the second water-stopping web 2. After pouring, the pouring template is removed, and one side of the placement cavity 4 is exposed, but the second water-stopping web 2 will not pop out. When pouring the lower outer well wall in sections, the end of the second water-stopping web 2 is torn apart from the upper shielding flange 7 or cut with a blade. Under the action of elasticity or external force, the second water-stopping web 2 enters the lower pouring space. After pouring, it directly contacts the concrete to form a water-stop that connects the upper and lower outer well walls in sections, preventing water from seeping into the well shaft through the joint.

[0036] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of the claims of this patent application.

Claims

1. A waterstop strip for freezing the outer wall of a well casing, characterized in that, It includes a first water-stopping web (1) and a second water-stopping web (2), which are connected by a movable component (3); the two adjacent outer wall segments (10) are the upper outer wall segment (10) and the lower outer wall segment (10), respectively; when the upper outer wall segment (10) is poured: the first water-stopping web (1) is preset in the pouring space of the upper outer wall segment (10), and the second water-stopping web (2) is taken into the pouring space of the upper outer wall segment (10) through the movable component (3); when the lower outer wall segment (10) is poured: the second water-stopping web (2) extends out from the pouring space of the upper outer wall segment (10) and enters the pouring space of the lower outer wall segment (10) through the movable component (3).

2. The waterstop strip for the joint of a frozen well casing according to claim 1, characterized in that, The upper outer wall segment (10) has a pre-set placement cavity (4) that can accommodate the second water-stopping web (2) in the casting space; or the first water-stopping web (1) has a placement cavity (4) that can accommodate the second water-stopping web (2); the placement cavity (4) prevents the concrete from contacting or partially contacting the second water-stopping web (2).

3. A waterstop strip for the joint of a frozen well casing according to claim 2, characterized in that, The placement cavity (4) has an opening that communicates with the casting space of the lower outer wall segment (10), and the second water-stopping web (2) extends out of the placement cavity (4) through the opening and enters the casting space of the lower outer wall segment (10).

4. A waterstop strip for the joint of a frozen well casing according to claim 3, characterized in that, When the outer wall is poured in sections (10) as described above: the pouring template (12) blocks the opening of the placement cavity (4).

5. A waterstop strip for the joint of a frozen well casing according to any one of claims 2-4, characterized in that, After the second water-stopping web (2) is inserted into the placement cavity (4), it is fixed in the placement cavity (4) by a temporary fixing component.

6. A waterstop strip for the joint of a frozen well casing according to any one of claims 2-4, characterized in that, When the outer wall is segmented (10) is poured: there is a shielding component that is sealed between the first water-stopping web (1) and the pouring template (12), and the shielding component forms a placement cavity (4) between the first water-stopping web (1) and the pouring template (12).

7. A waterstop strip for the joint of a frozen well casing according to claim 6, characterized in that, The shielding component includes an upper shielding flange (7) and a lower shielding block (6). The first water-stopping web (1) is arranged along the direction parallel to the center line of the well shaft. The lower shielding block (6) is connected to the lower part of the first water-stopping web (1). The upper shielding flange (7) is connected to the side of the upper shielding flange (7) adjacent to the casting template (12). The upper shielding flange (7) is tightly fitted to the side wall of the casting template (12). The lower shielding block (6) is tightly fitted to the bottom of the casting template (12). The space enclosed by the upper shielding flange (7), the lower shielding block (6), the first water-stopping web (1), and the casting template (12) is a placement cavity (4).

8. A waterstop strip for the joint of a frozen well casing according to any one of claims 2-4, characterized in that, The end of the second water-stopping plate (2) is connected to the movable component (3), and the second water-stopping plate (2) swings relative to the first water-stopping plate (1) in a direction close to or away from the first water-stopping plate (1) through the movable component (3) at the end; the second water-stopping plate (2) swings into the placement cavity (4) through the movable component (3).

9. A waterstop strip for the joint of a frozen well casing according to any one of claims 2-4, characterized in that, The movable component (3) is arranged along the length direction of the first water-stopping web (1) or the length direction of the second water-stopping web (2). The first water-stopping web (1) is slidably sealed with the first water-stopping web (1) through the movable component (3), and the second water-stopping web (2) is slidably retracted into the placement cavity (4).

10. A waterstop strip for the joint of a frozen well casing according to any one of claims 2-4, characterized in that, The second water-stopping web (2) is partially or entirely flexible in the length direction. The flexible portion of the second water-stopping web (2) forms a movable part (3). The second water-stopping web (2) is folded into the placement cavity (4) through the flexible portion.

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