A protection structure of an underground cavern prestressed anchor cable

Abstract

The utility model relates to a kind of protection structure of underground cavern prestressed anchor cable.It is applicable to underground building structure technical field.The utility model adopts the technical scheme: a kind of protection structure of underground cavern prestressed anchor cable, wall is provided on underground cavern side wall, wall is made with opening on corresponding position with prestressed anchor cable anchor head, baffle that can close opening is set on the side wall of the side of wall away from prestressed anchor cable on corresponding position with opening, baffle is installed on the side wall of wall by bolt.So, it is convenient to install baffle on wall in conventional state to protect prestressed anchor cable in the inside of wall;When needing to overhaul prestressed anchor cable, baffle can be removed from wall after removing bolt, it is convenient for personnel to overhaul prestressed anchor cable on the side of wall through opening.

Description

Technical Field

[0001] This utility model relates to a protective structure for prestressed anchor cables in underground caverns. It is applicable to the field of underground building structure technology. Background Technology

[0002] In underground caverns with poor geological conditions, prestressed anchor cable support is often required to maintain the overall stability of the cavern. Due to the complexity of the underground hydrogeological environment, the durability of the anchor cable structure faces significant challenges. Exposed anchor heads may suffer from steel corrosion, leakage and deterioration of anti-corrosion grease within the protective cover, all of which affect durability. If the anchor cable stress exceeds the limit or significant damage occurs, the anchor cable needs to be re-tensioned and locked. Considering the importance of prestressed anchor cable support for the overall stability of underground caverns in poor surrounding rock, it is essential to regularly inspect the anchor cables during operation to promptly identify and repair problems, such as rust removal, replacement of anti-corrosion grease and protective covers, and even re-tensioning of the anchor cables. Under normal circumstances, the rock walls of underground caverns are covered by concrete walls or other masonry, making anchor cable maintenance difficult. Utility Model Content

[0003] The technical problem to be solved by this utility model is: to solve the above-mentioned technical problem, this utility model provides a protective structure for prestressed anchor cables in underground caverns.

[0004] The technical solution adopted by this utility model is: a protective structure for prestressed anchor cables in underground caverns. A wall is provided on the side wall of the underground cavern, and an opening is provided on the wall at the position corresponding to the anchor head of the prestressed anchor cable. A baffle that can close the opening is provided on the side wall away from the prestressed anchor cable at the position corresponding to the opening. The baffle is installed on the side wall of the wall by bolts.

[0005] A screw is installed on the side wall of the wall around the opening. The baffle has mounting holes at the corresponding positions of the screws. When the baffle is placed on the wall, the screw on the wall can pass through the mounting holes on the baffle. A nut that is threaded to the nut is installed at the end of the screw that passes through the mounting holes on the baffle. A washer is fitted on the screw between the nut and the baffle.

[0006] The nut is a wing nut.

[0007] The baffle is made of steel plate.

[0008] The baffle is covered with a layer of fire-resistant fabric.

[0009] A fireproof fabric pad is installed on the side of the baffle closest to the wall, and the fireproof fabric pad surrounds the opening when the baffle is placed on the wall.

[0010] The beneficial effects of this utility model are as follows: By setting an opening in the wall of the underground cavern and installing a baffle on the wall with bolts, it is convenient to protect the prestressed anchor cables on the inner side of the wall under normal conditions by installing the baffle on the wall; when it is necessary to inspect the prestressed anchor cables, the baffle can be removed from the wall by removing the bolts, so that personnel can easily inspect the prestressed anchor cables on one side of the wall through the opening.

[0011] This invention uses a steel plate as the baffle, wraps a fireproof fabric layer on the baffle, and sets a fireproof fabric pad on the baffle. This makes it easy to have good fire resistance when the baffle is installed on the wall, and avoids the exposed structure of the prestressed anchor cable being exposed to the threat of fire. Attached Figure Description

[0012] Figure 1 This is a structural cross-sectional view of the present invention.

[0013] Figure 2 This is a plan view of the baffle installed on the wall.

[0014] Figure 3 This is a cross-sectional view of the fireproof fabric padding layer between the baffle and the wall.

[0015] Figure 4 yes Figure 1 Enlarged view of point A in the middle.

[0016] In the diagram: 1. Wall; 2. Prestressed anchor cable; 3. Opening; 4. Baffle; 5. Screw; 6. Nut; 7. Fireproof fabric layer; 8. Fireproof fabric padding layer. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0018] Example 1 illustrates a protective structure for prestressed anchor cables 2 in an underground cavern. In this example, a wall 1 is installed on the side wall of the underground cavern. An opening 3 is formed on the wall 1 at a position corresponding to the anchor head of the prestressed anchor cable 2. A baffle 4, capable of closing the opening 3, is installed on the side wall of the wall 1 away from the prestressed anchor cable 2 at a position corresponding to the opening 3. The baffle 4 is bolted to the side wall of the wall 1. This allows for protection of the prestressed anchor cable 2 inside the wall 1 under normal conditions by installing the baffle 4 on the wall 1. When maintenance of the prestressed anchor cable 2 is required, the baffle 4 can be removed from the wall 1 by unbolting the bolts, allowing personnel to inspect the prestressed anchor cable 2 on one side of the wall 1 through the opening 3.

[0019] Example 2 is a protective structure for prestressed anchor cables 2 in underground caverns. Based on Example 1, in this example, screws 5 are installed on the sidewall of wall 1 around the opening 3. Mounting holes are formed on the baffle 4 at positions corresponding to the screws 5. When the baffle 4 is placed on wall 1, the screws 5 on wall 1 can pass through the mounting holes on the baffle 4. A nut 6, threadedly engaged with a nut 6, is installed at the end of the screw 5 passing through the mounting holes on the baffle 4. A washer is fitted onto the screw 5 between the nut 6 and the baffle 4. Thus, when the baffle 4 is installed on wall 1, the mounting holes on the baffle 4 are positioned corresponding to the screws 5 on wall 1. The engagement between the screws 5 and the mounting holes guides the installation of the baffle 4. After the baffle 4 is placed on wall 1, the washer and nut 6 are sequentially installed on the screws 5 to fix the baffle 4 to wall 1. When it is necessary to remove the baffle 4, the baffle 4 can be removed from the wall 1 by unscrewing the nut 6.

[0020] In this embodiment, nut 6 is a wing nut. This makes it easy for personnel to tighten the wing nut 6.

[0021] Example 3 is a protective structure for prestressed anchor cables 2 in underground caverns. Based on Example 1, in this example, the baffle 4 is a steel plate.

[0022] Furthermore, a fire-resistant fabric layer 7 is wrapped around the baffle 4.

[0023] Furthermore, a fireproof fabric pad 8 is provided on the side of the baffle 4 closest to the wall 1. When the baffle 4 is placed on the wall 1, the fireproof fabric pad 8 surrounds the opening 3. In this way, the baffle 4 has good fire resistance when installed on the wall 1, and the exposed structure of the prestressed anchor cable 2 is prevented from being exposed to the threat of fire.

[0024] In this embodiment, the fireproof fabric layer 7 and the fireproof fabric pad layer 8 are conventional fabrics that have undergone post-treatment with flame retardant finishing, using flame retardants such as THPC and TDBPP to form a fireproof film or chemically modified fibers; or they are directly made using flame-retardant polymer fibers such as Nomex (aramid 1313) and Kunol.

[0025] Example 4 is a protective structure for prestressed anchor cable 2 in an underground cavern. In this example, a wall 1 is provided on the side wall of the underground cavern. An opening 3 is made on the wall 1 at the position corresponding to the anchor head of the prestressed anchor cable 2. A baffle 4 that can close the opening 3 is provided on the side wall of the wall 1 away from the prestressed anchor cable 2 at the position corresponding to the opening 3. The baffle 4 is installed on the side wall of the wall 1 by bolts.

[0026] A screw 5 is installed on the side wall of the wall 1 around the opening 3. A mounting hole is made on the baffle 4 at the corresponding position of the screw 5. When the baffle 4 is arranged on the wall 1, the screw 5 on the wall 1 can pass through the mounting hole on the baffle 4. A nut 6 that is threaded to the nut 6 is installed at the end of the screw 5 that passes through the mounting hole on the baffle 4. A washer is fitted on the screw 5 between the nut 6 and the baffle 4.

[0027] The nut 6 is a wing nut 6.

[0028] The baffle 4 is made of steel plate.

[0029] A fireproof fabric layer 7 is wrapped around the baffle 4.

[0030] A fireproof fabric pad 8 is provided on the side of the baffle 4 closest to the wall 1. When the baffle 4 is placed on the wall 1, the fireproof fabric pad 8 surrounds the opening 3.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A protective structure for prestressed anchor cables in an underground cavern, wherein a wall (1) is provided on the side wall of the underground cavern, characterized in that: An opening (3) is made on the wall (1) at the position corresponding to the anchor head of the prestressed anchor cable (2). A baffle (4) that can close the opening (3) is provided on the side wall of the wall (1) away from the prestressed anchor cable (2) at the position corresponding to the opening (3). The baffle (4) is installed on the side wall of the wall (1) by bolts.

2. The protective structure for prestressed anchor cables in underground caverns according to claim 1, characterized in that: A screw (5) is installed on the side wall of the wall (1) around the opening (3). A mounting hole is made on the baffle (4) at the position corresponding to the screw (5). When the baffle (4) is arranged on the wall (1), the screw (5) on the wall (1) can pass through the mounting hole on the baffle (4). A nut (6) that is threaded with the nut (6) is installed at the end of the screw (5) that passes through the mounting hole on the baffle (4). A washer is fitted on the screw (5) between the nut (6) and the baffle (4).

3. The protective structure for prestressed anchor cables in underground caverns according to claim 2, characterized in that: The nut (6) is a wing nut.

4. The protective structure for prestressed anchor cables in underground caverns according to claim 1, characterized in that: The baffle (4) is a steel plate.

5. The protective structure for prestressed anchor cables in underground caverns according to claim 4, characterized in that: A fireproof fabric layer (7) is wrapped around the baffle (4).

6. The protective structure for prestressed anchor cables in underground caverns according to claim 4, characterized in that: A fireproof fabric pad (8) is provided on the side of the baffle (4) closest to the wall (1). When the baffle (4) is placed on the wall (1), the fireproof fabric pad (8) surrounds the opening (3).

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