Rock anchor rod foundation

Abstract

The utility model relates to the technical field of electric power engineering, in particular to a rock anchor rod foundation which comprises a bearing platform and at least one anchoring assembly, the first anchoring assembly comprises a plurality of anchor rods and a plurality of connecting columns, and the connecting columns of the same anchoring assembly are sequentially arranged at intervals from top to bottom. The anchor rods of the same anchoring assembly are arranged around the connecting columns of the same anchoring assembly at intervals in the axial direction, the anchor rods of the same anchoring assembly are fixed to the connecting columns of the same anchoring assembly, and the upper portions of the anchor rods of the same anchoring assembly and at least one connecting column, located on the upper portion, of the same anchoring assembly are fixed in the bearing platform. The lower portion of each anchor rod of the same anchoring assembly and the other connecting columns of the same anchoring assembly protrude to the position below the bearing platform. The multiple anchor rods form the anchoring assembly under the action of the connecting columns, the anchoring assembly is high in strength and large in bearing capacity, the excavation volume of a foundation pit is reduced, and the construction period of the power transmission tower is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power engineering, in particular to a rock anchor foundation. Background Art

[0002] The rock anchor foundation is a foundation type that uses rock mass as the main bearing layer for anchoring and anchor bars as the main tension member. As the installation foundation of the transmission tower, the rock anchor foundation is crucial to the stable operation of the transmission tower. For 500kV and above transmission line projects, the transmission tower has high requirements for the bearing capacity of the rock anchor foundation. In the traditional rock anchor foundation, the anchor bar uses a single steel bar. Due to the limitation of the steel bar diameter, the bearing capacity of a single anchor bar is limited. In order to meet the transmission tower requirements of 500kV and above transmission line projects, it is necessary to increase the number of anchor bars to ensure that the rock anchor foundation can meet the transmission tower requirements of 500kV and above transmission line projects. However, after the number of anchor bars increases, the number of anchor pits for burying anchor bars needs to be increased accordingly, which will increase the excavation volume of the anchor pits, resulting in a longer construction period and floor space for the transmission tower. Utility Model Content

[0003] The technical problem to be solved by the utility model is that: in the existing rock anchor foundation, the bearing capacity of a single anchor bar is relatively small, and when constructing a 500kV and above power transmission line project, a large number of anchor pits need to be excavated.

[0004] In order to solve the above technical problems, the purpose of the utility model is to provide a rock anchor foundation, including a cap and at least one anchor assembly, each of the anchor assemblies includes multiple anchor rods and multiple connecting columns, the connecting columns of the same anchor assembly are arranged in sequence from top to bottom, the anchor rods of the same anchor assembly are arranged axially at intervals around the connecting columns of the same anchor assembly, and the anchor rods of the same anchor assembly are fixed to the connecting columns of the same anchor assembly, the upper part of each anchor rod of the same anchor assembly and at least one connecting column located at the upper part of the same anchor assembly are fixed in the cap, and the lower part of each anchor rod of the same anchor assembly and the remaining connecting columns of the same anchor assembly protrude below the cap.

[0005] As a preferred solution, each of the anchor rods is threaded steel bar.

[0006] As a preferred solution, each of the connecting columns is threaded steel.

[0007] As a preferred solution, three anchor rods are provided, and the three anchor rods are evenly spaced and arranged around each of the connecting columns.

[0008] As a preferred solution, the connecting columns are all coaxially arranged.

[0009] As a preferred solution, each of the anchor rods and each of the connecting columns are welded.

[0010] As a preferred embodiment, the rock anchor foundation includes a plurality of anchor pits arranged on the rock ground, and each of the anchor rods and the connecting columns protruding below the pedestal are respectively located in each of the anchor pits, and each of the anchor pits is poured with concrete.

[0011] As a preferred solution, the concrete in the anchor pit is cast by pressure casting.

[0012] As a preferred solution, the rock anchor foundation includes a foundation pit, each of the anchor pits is arranged at the bottom of the foundation pit, and the cap is concrete poured in the foundation pit.

[0013] As a preferred solution, the concrete in the foundation pit is cast by pressure casting.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The rock anchor foundation of the utility model comprises a cap and at least one anchor assembly, each anchor assembly comprises a plurality of anchor rods and a plurality of connecting columns, the connecting columns of the same anchor assembly are sequentially arranged at intervals from top to bottom, the anchor rods of the same anchor assembly are arranged at intervals around the axial direction of the connecting columns of the same anchor assembly, and the anchor rods of the same anchor assembly are fixed to the connecting columns of the same anchor assembly, the upper part of the anchor rods of the same anchor assembly and at least one connecting column of the same anchor assembly located at the upper part are fixed in the cap, and the lower part of the anchor rods of the same anchor assembly and the remaining connecting columns of the same anchor assembly protrude below the cap; the plurality of anchor rods form an anchor assembly under the action of the connecting columns, and the anchor assembly has high strength and large bearing capacity; therefore, when constructing a 500kV and above transmission line project, the number of anchor assemblies required is much smaller than the number of anchor bars required by the current construction plan, thereby reducing the amount of foundation pit excavation and shortening the construction period of the transmission tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the rock anchor foundation of the utility model;

[0017] Figure 2 is a structural schematic diagram of an anchoring assembly;

[0018] In the figure, 1. anchoring assembly, 11. anchor rod, 12. connecting column, 2. pedestal, 3. anchoring pit. DETAILED DESCRIPTION

[0019] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0020] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", 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 present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. It should be understood that the terms "first", "second", etc. are used in the present utility model to describe various information, but such information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present utility model, the "first" information may also be referred to as the "second" information, and similarly, the "second" information may also be referred to as the "first" information.

[0021] like Figure 1 , Figure 2 As shown, a preferred embodiment of the rock anchor foundation of the utility model comprises a cap 2 and at least one anchor assembly 1, each anchor assembly 1 comprises a plurality of anchor rods 11 and a plurality of connecting columns 12, the connecting columns 12 of the same anchor assembly 1 are sequentially spaced from top to bottom, the anchor rods 11 of the same anchor assembly 1 are axially spaced around the connecting columns 12 of the same anchor assembly 1, and the anchor rods 11 of the same anchor assembly 1 are fixed to the connecting columns 12 of the same anchor assembly 1, the upper parts of the anchor rods 11 of the same anchor assembly 1 and at least one connecting column 12 of the same anchor assembly 1 located at the upper part are fixed in the cap 2, and the lower parts of the anchor rods 11 of the same anchor assembly 1 and the remaining connecting columns 12 of the same anchor assembly 1 protrude below the cap 2. The anchor assembly 1 has high strength and large bearing capacity; therefore, when constructing a 500kV and above transmission line project, the number of anchor assemblies 1 required is much smaller than the number of single anchor bars required by the current construction plan, thereby reducing the amount of foundation pit excavation; moreover, the processing of the anchor assembly 1 can be carried out in parallel with the excavation of the transmission tower foundation pit or in advance of the foundation pit excavation, shortening the construction period of the transmission tower.

[0022] In this embodiment, each anchor rod 11 is a threaded steel bar; specifically, the cap 2 is cast by concrete, and the threaded steel bar has a large pull-out resistance in concrete. In this embodiment, the anchor rod 11 is set as a threaded steel bar to ensure the bonding force between the anchor assembly 1 and the cap 2. In other embodiments of the utility model, the anchor rod 11 can be made of ordinary steel bars.

[0023] The connecting column 12 not only connects the anchor rods 11, so that the anchor rods 11 and the connecting columns 12 are fixedly connected to form the anchor assembly 1; moreover, the connecting column 12 also increases the pull-out resistance of the anchor assembly 1 in the cap 2. This is because the connecting columns 12 are arranged at intervals up and down, and each connecting column 12 is a solid steel bar. The space between the two adjacent connecting columns 12 is filled with concrete, which can increase the pull-out resistance of the anchor assembly 1. Therefore, there is no need to set a bending portion at the end of each anchor rod 11, which can simplify the processing flow of the anchor assembly 1.

[0024] In this embodiment, each connection column 12 is a threaded steel bar. The outer side of the threaded steel bar has a threaded groove. The connection column 12 is set as a threaded steel bar. The side of each anchor rod 11 facing the center of each connection column 12 is fixedly connected to each connection column 12 by welding. The threaded groove on the surface of the threaded steel bar is convenient for filling with welding liquid, thereby ensuring the direct connection strength between the connection column 12 and the anchor rod 11.

[0025] Among them, there are three anchor rods 11, and the three anchor rods 11 are evenly arranged around each connecting column 12. The diameter of the connecting column 12 is the same as the diameter of the anchor rod 11. The length of the anchor rod 11 is 50 mm, and the interval between two adjacent connecting columns 12 is 1.5 m. In this embodiment, there are three connecting columns 12, two of the three connecting columns 12 are respectively located at the upper and lower ends of the anchor assembly 1, and the other one of the three connecting columns 12 is located in the middle of the anchor assembly 1.

[0026] In other embodiments of the present invention, the number of the connecting columns 12 may be greater than three, and the number of the anchor rods 11 may be greater than three.

[0027] In this embodiment, each connecting column 12 is coaxially arranged. In other embodiments of the utility model, each anchor rod 11 can be bent before welding the anchor rod 11, and after welding, the shape of the anchor assembly 1 matches the geographical shape of the part to be fixed.

[0028] In this embodiment, the rock bolt foundation includes a first foundation pit and a plurality of anchoring pits 3 arranged at the bottom of the first foundation pit, the cap 2 is concrete poured in the foundation pit, and each anchor rod 11 and each connecting column 12 protruding below the cap 2 are respectively located in each anchoring pit 3, and each anchoring pit 3 is poured with concrete. In this embodiment, the concrete in the foundation pit and the anchoring pit 3 can be made of materials such as fine stone concrete and cement mortar.

[0029] The anchor assembly 1 utilizes three shorter steel bars to weld and fix three anchor rods 11 to form an anchor bar bundle. Therefore, the bearing capacity of the anchor assembly 1 is greater than that of a single anchor bar. Under the condition of the same foundation force, the number of anchor bars and the size of the pedestal 2 can be reduced, which can reduce the excavation volume of the foundation pit and soil erosion, minimize the degree of damage to the vegetation near the tower position, and reduce the destructive impact of the rock anchor foundation construction on the environment.

[0030] In this embodiment, in order to ensure the support strength of the rock bolt foundation, the concrete in the anchor pit 3 and the foundation pit are poured by pressure pouring. There are multiple anchor assemblies 1, which are horizontally spaced and arranged at the bottom of the cap 2.

[0031] In summary, the rock bolt foundation of the utility model comprises a cap 2 and at least one anchor assembly 1, each anchor assembly 1 comprises a plurality of anchor rods 11 and a plurality of connecting columns 12, each connecting column 12 of the same anchor assembly 1 is sequentially arranged from top to bottom, each anchor rod 11 of the same anchor assembly 1 is arranged axially at intervals around each connecting column 12 of the same anchor assembly 1, and each anchor rod 11 of the same anchor assembly 1 is fixed to each connecting column 12 of the same anchor assembly 1, and the upper part of each anchor rod 11 of the same anchor assembly 1 and the upper part of the same anchor assembly 1 are connected to each other. At least one connecting column 12 of the anchor assembly 1 is fixed in the pedestal 2, and the lower part of each anchor rod 11 of the same anchor assembly 1 and the remaining connecting columns 12 of the same anchor assembly 1 all protrude below the pedestal 2; multiple anchor rods 11 form an anchor assembly 1 under the action of the connecting columns 12, and the anchor assembly 1 has high strength and large bearing capacity; therefore, when constructing a 500kV and above transmission line project, the number of anchor assemblies 1 required is much smaller than the number of anchor bars required by the current construction plan, thereby reducing the excavation amount of the foundation pit and shortening the construction period of the transmission tower.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A rock bolt foundation, characterized in that: The invention comprises a cap (2) and at least one anchor assembly (1), each of the anchor assemblies (1) comprising a plurality of anchor rods (11) and a plurality of connecting columns (12), the connecting columns (12) of the same anchor assembly (1) being arranged in sequence from top to bottom, the anchor rods (11) of the same anchor assembly (1) being arranged in axial spacing around the connecting columns (12) of the same anchor assembly (1), and the anchor rods (11) of the same anchor assembly (1) being arranged in axial spacing. ) are fixed to the connecting columns (12) of the same anchor assembly (1), the upper parts of the anchor rods (11) of the same anchor assembly (1) and at least one connecting column (12) located at the upper part of the same anchor assembly (1) are fixed in the base (2), and the lower parts of the anchor rods (11) of the same anchor assembly (1) and the remaining connecting columns (12) of the same anchor assembly (1) protrude below the base (2).

2. The rock bolt foundation according to claim 1, characterized in that: Each of the anchor rods (11) is threaded steel bar.

3. The rock bolt foundation according to claim 1, characterized in that: Each of the connecting columns (12) is threaded steel.

4. The rock bolt foundation according to claim 1, characterized in that: Three anchor rods (11) are provided, and the three anchor rods (11) are evenly spaced and arranged around each of the connecting columns (12).

5. The rock bolt foundation according to claim 1, characterized in that: Each of the connecting columns (12) is coaxially arranged.

6. The rock bolt foundation according to claim 1, characterized in that: Each of the anchor rods (11) and each of the connecting columns (12) are welded.

7. The rock bolt foundation according to claim 1, characterized in that: The rock anchor foundation comprises a plurality of anchor pits (3) arranged on the rock ground, each anchor rod (11) and each connecting column (12) protruding below the cap (2) are respectively located in each anchor pit (3), and each anchor pit (3) is poured with concrete.

8. The rock bolt foundation according to claim 7, characterized in that: The concrete in the anchoring pit (3) is cast by pressure casting.

9. The rock bolt foundation according to claim 7, characterized in that: The rock bolt foundation comprises a foundation pit, each of the anchoring pits (3) is arranged at the bottom of the foundation pit, and the cap (2) is concrete poured in the foundation pit.

10. The rock bolt foundation according to claim 9, characterized in that: The concrete in the foundation pit is cast by pressure casting.

Images