Anchor cable stress over-limit fracture ejection protection device

Abstract

After grouting is conducted on an anchor cable, when a cast-in-place reinforced concrete structure is constructed, a pre-embedded steel bar pull rod and a pre-embedded connecting sleeve are arranged, and after the anchor cable is subjected to pre-stress tensioning and locking to be qualified, redundant steel strands are cut off through a hand grinding wheel, the steel bar pull rod and a protection steel plate are installed, and the anchor cable is subjected to stress overrun fracture ejection protection. And finally, the concrete sealing anchor is constructed and forms a whole with the protective steel plate to jointly prevent the anchor cable from catapulting and scattering, so that the catapulting force generated by fracture can be quickly and effectively absorbed when the anchor cable is fractured, accidental injury caused by the fracture of the anchor cable is prevented, and surrounding personnel and equipment are protected from being injured. The device is simple in structure, easy to install on site, free of maintenance and wide in application range, can be widely applied to the fields of slope supporting of mines, buildings, water conservancy and the like, and has important social and economic effects.

Description

Technical Field

[0001] The utility model belongs to the technical field of slope support engineering, and in particular relates to an anchor cable stress over-limit fracture ejection protection device. Background Art

[0002] Anchor cables are an important reinforcement and management tool in slope support applications such as mining, construction, and water conservancy projects. Their safety and stability are crucial. However, due to various factors, such as wear, overload, and corrosion, anchor cables can break, generating powerful ejection forces. Flying debris can cause serious damage to surrounding personnel and equipment. Therefore, developing a device that can effectively prevent anchor cable breakage and ejection is of great practical significance. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies in the prior art, in order to solve the problems existing in the above-mentioned prior art, the utility model provides an anchor cable stress over-limit fracture ejection protection device. During the operation of the prestressed anchor cable, due to various reasons such as wear, overload, corrosion, etc., the anchor cable may break, generating a strong ejection force, thereby preventing the anchor cable ejecta from flying and causing serious damage to surrounding personnel and equipment.

[0004] Its main technical solution is: an anchor cable stress over-limit fracture ejection protection device, including a reinforced concrete structure and an anchor cable embedded in the reinforced concrete structure, embedded steel bar pull rods are arranged in the reinforced concrete structure on both sides of the anchor cable, the top of the embedded steel bar pull rod is connected to the steel bar pull rod through an embedded connecting sleeve, the top of the steel bar pull rod is higher than the top of the anchor cable, and a protective steel plate is fixed to the top of the steel bar pull rod by a fixing nut.

[0005] Furthermore, the embedded connecting sleeve used to connect the embedded steel bar pull rods to the steel bar pull rods is located below the upper surface layer of the reinforced concrete structure.

[0006] Furthermore, a concrete anchor is provided on the upper surface of the reinforced concrete structure.

[0007] Furthermore, the concrete anchor seal encapsulates the steel bar pull rod and the protective steel plate outside the upper surface of the reinforced concrete structure.

[0008] The beneficial effects of the anchor cable stress over-limit fracture ejection protection device of the utility model are:

[0009] ① The utility model provides an anchor cable stress over-limit fracture ejection protection device, which can quickly and effectively absorb the ejection force generated by the fracture when the anchor cable breaks, so as to prevent accidental injuries caused by the anchor cable fracture and protect surrounding personnel and equipment from harm.

[0010] ②This device has a simple structure, is easy to install on site and is maintenance-free.

[0011] ③This device has a wide range of applications and can be widely used in slope support fields such as mining, construction, water conservancy, etc., and has important social and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0013] Figure 1 It is a side sectional schematic diagram of the overall structure of the utility model;

[0014] Among them: 1. Reinforced concrete structure; 2. Anchor cable; 3. Embedded steel bar pull rod; 4. Embedded connecting sleeve; 5. Steel bar pull rod; 6. Fixing nut; 7. Protective steel plate; 8. Concrete anchor. DETAILED DESCRIPTION

[0015] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant utility model and are not intended to limit the utility model. It should also be noted that, for ease of description, only the portions relevant to the utility model are shown in the accompanying drawings.

[0016] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0017] A device for protecting against excessive stress fracture and ejection of an anchor cable comprises a reinforced concrete structure 1 and an anchor cable 2 embedded in the reinforced concrete structure 1. Pre-embedded steel bar pull rods 3 are arranged in the reinforced concrete structure 1 on both sides of the anchor cable 2. The top of the pre-embedded steel bar pull rods 3 is connected to a steel bar pull rod 5 through a pre-embedded connecting sleeve 4. The top of the steel bar pull rod 5 is higher than the top of the anchor cable 2. A protective steel plate 7 is fixed to the top of the steel bar pull rod 5 through a fixing nut 6.

[0018] The embedded connecting sleeve 4 used to connect the embedded steel bar tie rod 3 with the steel bar tie rod 5 is located below the upper surface layer of the reinforced concrete structure 1.

[0019] A concrete sealing anchor 8 is provided on the upper surface of the reinforced concrete structure 1 , and the concrete sealing anchor 8 encapsulates the steel bar pull rod 5 and the protective steel plate 7 outside the upper surface of the reinforced concrete structure 1 .

[0020] During the normal operation of anchor cable 2, when the stress of anchor cable 2 is monitored to increase steadily, it is indicated that anchor cable 2 may break and fail, and nearby personnel and equipment must be evacuated in time. When the stress limit is reached and exceeded, anchor cable 2 breaks and fails.

[0021] Safety protection device: When the anchor cable 2 breaks, the protective steel plate 7 is fixed to the reinforced concrete structure 1 through the steel bar pull rod 5, the fixing nut 6 and the embedded steel bar pull rod 3. The protective steel plate 7 and the concrete sealing anchor 8 work together to block the anchor cable 2 from catapulting and scattering, protecting the surrounding personnel and equipment from damage caused by the catapulting force.

[0022] The embedded steel bar pull rod 3 is made of 22mm diameter HRB400 threaded steel bar, the embedded connecting sleeve 4 is made of straight thread connecting sleeve, the steel bar pull rod 5 is made of 22mm diameter HRB400 threaded steel bar, the protective steel plate 7 is made of 15mm thick Q235 steel plate, and the concrete sealing anchor 8 is made of C20 cast-in-place concrete.

[0023] The utility model discloses an on-site installation process of an anchor cable stress over-limit fracture ejection protection device: after the anchor cable 2 is lowered and grouting is performed, a pre-buried steel bar pull rod 3 and a pre-buried connecting sleeve 4 are set when constructing a cast-in-place reinforced concrete structure 1. After the anchor cable 2 is prestressed and locked and qualified, a hand grinding wheel is used to cut off the excess steel strands, and the steel bar pull rod 5 and the protective steel plate 7 are installed and tightened with a fixing nut 6. Finally, a concrete sealing anchor 8 is constructed to form a whole with the protective steel plate 7, which work together to block the anchor cable 2 from ejecting and scattering, thereby protecting surrounding personnel and equipment from being harmed by ejected and scattered objects.

[0024] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the utility model disclosed in this application is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the concept of the utility model. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An anchor cable stress over-limit fracture ejection protection device, comprising a reinforced concrete structure (1) and an anchor cable (2) embedded in the reinforced concrete structure (1), characterized in that: Embedded steel bar pull rods (3) are provided in the reinforced concrete structure (1) on both sides of the anchor cable (2); the top of the embedded steel bar pull rod (3) is connected to a steel bar pull rod (5) via an embedded connecting sleeve (4); the top of the steel bar pull rod (5) is higher than the top of the anchor cable (2); and a protective steel plate (7) is fixedly installed on the top of the steel bar pull rod (5) via a fixing nut (6).

2. The anchor cable over-stress fracture ejection protection device according to claim 1, characterized in that: The embedded connecting sleeve (4) used for connecting the embedded steel bar tie rod (3) with the steel bar tie rod (5) is located below the upper surface layer of the reinforced concrete structure (1).

3. The anchor cable over-stress fracture ejection protection device according to claim 1, characterized in that: A concrete sealing anchor (8) is provided on the upper surface of the reinforced concrete structure (1).

4. The anchor cable over-stress fracture ejection protection device according to claim 3, characterized in that: The concrete sealing anchor (8) encapsulates the steel bar pull rod (5) and the protective steel plate (7) located outside the upper surface of the reinforced concrete structure (1).

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