Overhead anchor system and laying method thereof

Abstract

The invention belongs to the technical field of underground cavern construction, and particularly relates to an overhead anchor system and a laying method thereof. Wherein the overhead anchor system comprises two sets of hoisting equipment; the hoisting equipment comprises an anchor rod, a connecting assembly and an electric hoist, the connecting assembly is arranged at one end of the anchor rod, and the electric hoist is arranged on the connecting assembly; the two sets of hoisting equipment are arranged on the two sides of the top of the underground cavern correspondingly, and the two sets of hoisting equipment are located in the same vertical plane. When the overhead anchor system is used, the electric hoists in the two sets of hoisting equipment can be used for hoisting the two sides of to-be-mounted equipment respectively, so that the to-be-mounted equipment can be hoisted stably, the to-be-mounted equipment is prevented from swinging greatly, and potential safety hazards in the hoisting process are reduced.

Description

Technical Field

[0001] This invention belongs to the field of underground cavern construction technology, and specifically relates to a sky anchor system and its deployment method. Background Technology

[0002] In water conservancy project construction, the anchor system is a key facility to ensure the installation of large equipment and structural construction.

[0003] Currently, in underground caverns (such as tunnels or underground factories), the hoisting equipment for the overhead anchor system is mostly located in the middle of the top of the underground cavern. When in use, this type of overhead anchor system uses a single-point hoisting method to lift large equipment. During the hoisting process, the large equipment is prone to large swings, making it difficult to position and posing a significant safety hazard. In addition, the distance between the lifting point of the large equipment and the anchoring point of the hoisting equipment is small, resulting in insufficient effective operating space for the overhead anchor system, which is difficult to meet the usage requirements. Summary of the Invention

[0004] This invention provides a sky anchor system and its deployment method to solve the technical problem that in the prior art, the hoisting equipment of the sky anchor system is mostly set in the middle position of the top of the underground cavern, which easily leads to large equipment swinging during use and poses a significant safety hazard.

[0005] This invention is achieved through the following technical solution: a sky anchor system, comprising two sets of hoisting equipment; The hoisting equipment includes anchor bolts, connecting components, and electric hoists. The connecting components are located at one end of the anchor bolts, and the electric hoists are mounted on the connecting components. The two sets of hoisting equipment are respectively located on both sides of the top of the underground cavern, and the two sets of hoisting equipment are located in the same vertical plane.

[0006] To better realize the present invention, the above structure is further optimized, and the distance between the two sets of hoisting equipment is greater than or equal to the width of the equipment to be hoisted.

[0007] To better realize the present invention, the above structure is further optimized, and the connecting component includes a fixing plate and a fixing rod; The number of anchor bolts is four; There are four fixing plates, which are welded and fixed to the four anchor rods one by one, so that the four fixing plates form a box with a rectangular cross-section. The two ends of the fixing rod are respectively welded to a set of opposite fixing plates, and the electric hoist is hung on the fixing rod.

[0008] A method for deploying the above-mentioned anchor system, the method comprising the following steps: Determine the installation locations of the hoisting equipment on both sides of the top of the underground cavern; Anchor holes are drilled at the installation location, and the anchor holes on both sides of the top of the underground cavern are located in the same vertical plane; Select two sets of hoisting equipment and anchor the anchor bolts of the two sets of hoisting equipment into the anchor holes on both sides of the top of the underground cavern; Install the connecting components and the electric hoist in sequence.

[0009] To better realize the present invention, the above method is further optimized. After the anchor bolt is anchored, when the anchor bolt reaches the design strength after grouting and curing, the anchor bolt is subjected to non-destructive testing. After the anchoring quality is qualified, install the connecting components and electric hoist in sequence.

[0010] To better realize the present invention, the above method is further optimized by conducting a graded load test on the anchor system after the installation of the connecting components and the electric hoist is completed.

[0011] To better realize the present invention, the above method is further optimized. The graded load test is based on the design load and sequentially performs a 100% static load test, a 100% dynamic load test, and a 120% overload test. During the graded load test, the status of the connection components and anchor rods, as well as the connection between the connection components and the electric hoist, is monitored throughout the process.

[0012] Compared with the prior art, the present invention has the following advantages: In the sky anchor system provided by this invention, two sets of hoisting equipment are respectively set on both sides of the top of the underground cavern and are located in the same vertical plane. In use, the electric hoists in the two sets of hoisting equipment can respectively hoist both sides of the equipment to be installed, so as to steadily lift the equipment to be installed and avoid large swings of the equipment to be installed, thereby reducing safety hazards during the hoisting process. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of the sky anchor system of the present invention in use.

[0015] Figure 2 This is a connection state diagram of the connecting component and the anchor rod in a sky anchor system of the present invention.

[0016] In the picture: 1. Anchor bolt; 2. Connecting components; 3. Electric hoist. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0018] In the description of this invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0020] In the embodiments of this application, such as Figure 1 and Figure 2 As shown, the anchor system includes two sets of hoisting equipment; among them, The hoisting equipment includes an anchor bolt 1, a connecting assembly 2, and an electric hoist 3. The connecting assembly 2 is located at one end of the anchor bolt 1, and the electric hoist 3 is located on the connecting assembly 2. Two sets of hoisting equipment are respectively installed on both sides of the top of the underground cavern, see [reference]. Figure 1 Furthermore, both sets of hoisting equipment are located in the same vertical plane.

[0021] When in use, the electric hoists 3 in the two sets of hoisting equipment can be hoisted on both sides of the equipment to be installed to lift it smoothly. In this state, the center of gravity of the equipment to be installed is located between the two sets of hoisting equipment. Constrained by the two sets of hoisting equipment, the equipment to be installed will not swing significantly, thereby improving the safety of the hoisting process and reducing safety hazards.

[0022] In addition, the hoisting equipment is set on the side of the top of the underground cavern. The distance between the anchor point of the hoisting equipment and the lifting point on the side of the equipment to be installed is L1, and the distance between the middle position of the top of the underground cavern and the lifting point on the top of the equipment to be installed is L2. L1 is greater than L2, so that the hoisting equipment has enough operating space. Moreover, when encountering weak or broken surrounding rock, it is not necessary to excavate the middle position of the top of the underground cavern to meet the reinforcement requirements, thereby improving the safety of the underground cavern construction process and reducing the installation difficulty of the anchor system.

[0023] It is worth noting that in weak and fractured surrounding rock, the self-stabilization time of the surrounding rock is short after the underground cavern is excavated, requiring the support to closely follow the excavation face. If the top arch (the middle position of the top of the underground cavern) is expanded, it is easy to damage the arch-shaped load-bearing structure of the underground cavern, thereby causing a collapse. The two sets of hoisting equipment in the anchor system provided in this embodiment are respectively set at the two sides of the top of the underground cavern. When encountering weak and fractured surrounding rock, it is only necessary to expand the excavation to the design cross-section and carry out I-beam support to reinforce the hoisting equipment; while the expansion at this position (the two sides of the top of the underground cavern) will not damage the arch-shaped load-bearing structure of the underground cavern, thus ensuring the safety of the construction process.

[0024] In some embodiments, the distance between the two sets of hoisting equipment is greater than or equal to the width of the equipment to be hoisted, so that the anchor system can better constrain the equipment to be installed when hoisting it, and further avoid large swinging.

[0025] 1. In an optimized configuration, the aforementioned connecting component 2 includes a fixing plate and a fixing rod; wherein, The number of anchor bolts 1 is four; There are four fixing plates, which are welded and fixed to the four anchor rods 1 in a one-to-one correspondence, so that the four fixing plates form a box with a rectangular cross-section. The two ends of the fixing rod are welded to a set of opposite fixing plates, and the electric hoist 3 is hung on the fixing rod to make the installation and disassembly of the electric hoist 3 more convenient.

[0026] Based on the above-described structure of the sky anchor system, this embodiment provides a method for deploying the sky anchor system, which includes the following steps: Determine the installation locations of the hoisting equipment on both sides of the top of the underground cavern; An anchor hole is drilled at the installation location. In this embodiment, the anchor hole is drilled with a diameter of 60mm using drilling equipment, and its axis forms a 70° angle with the horizontal plane. The end of the anchor hole furthest from the center of the underground cavern is inclined towards the side of the underground cavern. See [reference needed]. Figure 1 Furthermore, the anchor holes on both sides of the top of the underground cavern are located in the same vertical plane; Two sets of hoisting equipment were selected, and the anchor rods 1 in the two sets of hoisting equipment were respectively anchored in the anchor holes on both sides of the top of the underground cavern to complete the anchoring construction of the anchor rods 1. In this embodiment, the diameter of the anchor rod 1 is 28mm and the length is 5.7m. The eight anchor rods 1 are divided into two groups and inserted into the anchor holes on both sides of the top of the underground cavern, with four in each group. The axis line connecting the four anchor rods 1 in the same group forms a rectangle. Install the connecting component 2 and the electric hoist 3 in sequence; specifically, weld and fix the connecting component 2 to one end of the four anchor rods 1 near the center of the underground cavern, and then hang the electric hoist 3 on the connecting component 2 to complete the installation of the sky anchor system in the underground cavern.

[0027] This deployment method provides the anchor system with sufficient operational space to meet its usage requirements.

[0028] The electric hoist 3 mentioned above is a small and lightweight lifting device with features such as small size, light weight, and simple operation. It is widely used in industrial and mining enterprises, warehouses, docks and other places.

[0029] In some embodiments, after the anchoring of anchor rod 1 is completed, when the grouting curing of anchor rod 1 reaches the design strength, non-destructive testing is performed on anchor rod 1. In this embodiment, the non-destructive testing of anchor rod 1 is performed by using an anchor rod non-destructive testing instrument to test the mortar density and length of anchor rod 1 to determine the anchoring quality of anchor rod 1, so as to ensure that the mortar density and length of anchor rod 1 meet the design requirements. After the anchoring quality is qualified, install the connecting component 2 and the electric hoist 3 in sequence according to the above method.

[0030] In some embodiments, after the installation of the connecting component 2 and the electric hoist 3 is completed, a graded load test is performed on the anchor system. Specifically, the graded load test is based on the design load, and 100% static load test, 100% dynamic load test and 120% overload test are carried out in sequence. During the graded load test, the status of the connection between the connecting component 2 and the anchor rod 1 and the connection between the connecting component 2 and the electric hoist 3 is monitored throughout the process. In this embodiment, the graded load test is based on the design load of 245kN. During the graded load test, the weld between the fixing plate and the anchor rod 1, the anchoring position of the anchor rod 1 and the weld between the fixing rod and the fixing plate are monitored throughout the process. After confirming that there are no problems such as loosening, deformation and cracks, it can be put into actual use and the subsequent hoisting operation of the equipment to be installed is successfully completed.

[0031] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A sky anchor system, characterized in that: Includes two sets of hoisting equipment; The hoisting equipment includes an anchor bolt (1), a connecting assembly (2), and an electric hoist (3). The connecting assembly (2) is located at one end of the anchor bolt (1), and the electric hoist (3) is located on the connecting assembly (2). The two sets of hoisting equipment are respectively located on both sides of the top of the underground cavern, and the two sets of hoisting equipment are located in the same vertical plane.

2. The anchor system according to claim 1, characterized in that: The distance between the two sets of hoisting equipment is greater than or equal to the width of the equipment to be hoisted.

3. The anchor system according to claim 1, characterized in that: The connecting assembly (2) includes a fixing plate and a fixing rod; The number of anchor bolts (1) is four; There are four fixing plates. The four fixing plates are welded and fixed to the four anchor rods (1) in a one-to-one correspondence, so that the four fixing plates form a box with a rectangular cross-section. The two ends of the fixed rod are respectively welded to a set of opposite fixed plates, and the electric hoist (3) is hung on the fixed rod.

4. A method for deploying a sky anchor system as described in any one of claims 1 to 3, characterized in that: Includes the following steps: Determine the installation locations of the hoisting equipment on both sides of the top of the underground cavern; Anchor holes are drilled at the installation location, and the anchor holes on both sides of the top of the underground cavern are located in the same vertical plane; Two sets of hoisting equipment were selected, and the anchor rods (1) in the two sets of hoisting equipment were respectively anchored in the anchor holes on both sides of the top of the underground cavern; Install the connecting component (2) and the electric hoist (3) in sequence.

5. The method for deploying the anchor system according to claim 4, characterized in that: After the anchor bolt (1) is anchored, when the anchor bolt (1) reaches the design strength after grouting and curing, non-destructive testing is carried out on the anchor bolt (1); After the anchoring quality is qualified, the connecting component (2) and the electric hoist (3) are installed in sequence.

6. The method for deploying the anchor system according to claim 4, characterized in that: After the installation of the connecting components (2) and the electric hoist (3) is completed, a graded load test is conducted on the anchor system.

7. The method for deploying the anchor system according to claim 6, characterized in that: The graded load test is based on the design load, and 100% static load test, 100% dynamic load test and 120% overload test are carried out in sequence. During the graded load test, the status of the connection between the connecting component (2) and the anchor rod (1) and the connection between the connecting component (2) and the electric hoist (3) is monitored throughout the process.

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