Simple connecting device for steel frame and feet-lock bolt
By designing a simple connection device for steel frame and lock foot anchor for tunnel engineering, the problems of unreliable connection and complex equipment in the prior art are solved, and a more stable support effect and a safer construction process are achieved.
Patent Information
- Application Number
- CN202421348871.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-13
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-06-13
AI Technical Summary
In the existing tunnel projects, the connection method between the grille steel frame and the lock foot anchor rod has problems such as unreliable connection, poor strength and complex connection devices, resulting in poor initial support effect and increasing construction risks.
A simple connection device between a steel frame and a lock foot anchor is designed, and a combination of a frame body, a connecting component and an anchor body is used to achieve a stable connection between the frame body and the anchor body through an enclosure member and a symmetrically arranged restriction member.
It improves the installation accuracy of the anchor body, ensures the overall stability of the frame, enhances the initial support effect, and reduces the safety hazards of tunnel construction.
Smart Images
Figure CN222615366U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tunnel engineering support, in particular to a simple connection device for a steel frame and a locking foot anchor rod. Background Art
[0002] In recent years, in the early stages of tunnel excavation in some areas, objective factors such as poor surrounding rock quality and complex engineering geological conditions are often encountered. It is usually necessary to set up initial support structures such as grid steel frames and locking anchors for reinforcement. However, due to improper connection methods and connection devices of grid steel frames and locking anchors, the initial support effect is poor, which makes it easy for serious engineering accidents to occur during the construction process, resulting in significant casualties and economic losses.
[0003] At present, the connection methods between the grid steel frame and the locking foot anchor rod mainly adopt welding and mechanical connection. For welding, "L"-shaped steel bars are currently mainly used as the connection medium, and then the locking foot anchor rod, the medium component and the grid steel frame are welded together. However, the contact area between the "L"-shaped steel bars and the grid steel frame and the locking foot anchor rod is too small, which will lead to an unreliable connection between the two, and the strength of the "L"-shaped steel bars is poor, which is easy to deform or even break, resulting in partial separation of the grid steel frame and the locking foot anchor rod, which restricts the support effect of the initial support to a certain extent; for mechanical connection, the corresponding connection medium is also used to combine the locking foot anchor rod and the grid steel frame. Since welding is not required, the structure of the connection medium is relatively complex, such as bolt + steel plate combination, complex clip and special-shaped connection device. However, although the connection node strength of the mechanical component is higher than the weld in welding, the locking foot effect is better, but the structure of the component itself is complex and the installation steps are cumbersome, which increases the installation construction time, affects the construction period, and is not conducive to the rapid construction of the tunnel. Utility Model Content
[0004] The purpose of the utility model is to provide a simple connection device between a steel frame and a locking foot anchor rod to solve the problems raised in the above background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a simple connection device between a steel frame and a locking foot anchor rod, comprising a frame, a rock mass supported by the frame is arranged on the back of the frame, anchor rod bodies for connecting the frame and the rock mass are arranged on both sides of the frame, a connecting assembly for connecting the anchor rod body and the frame is arranged on the outside of the frame, the connecting assembly comprises an embracing member and a symmetrically arranged limiting member, the limiting member comprises a limiting steel plate, and the anchor rod body and the limiting steel plate are interlaced.
[0006] Preferably, the embracing member includes a rectangular steel plate and a symmetrically arranged diamond-shaped steel plate, and the opposite ends of the rectangular steel plate and the diamond-shaped steel plate are fixedly connected with a rounded steel plate.
[0007] Preferably, one side of the diamond-shaped steel plate is fixedly connected to one side of the limiting steel plate, and a limiting groove for inserting the anchor rod body is provided on the front side of one side of the limiting steel plate.
[0008] Preferably, the vertical cross-section of the limiting groove is a square, the side length of the limiting groove is 1.1-1.3 times the diameter of the anchor body, and the inclination angle of the diamond-shaped steel plate is consistent with the angle of the anchor body.
[0009] Preferably, the transverse cross-section of the rounded steel plate is a quarter arc, and the diameter of the arc is 0.5-1 times the diameter of the vertical main reinforcement of the frame.
[0010] Preferably, the thickness of the rectangular steel plate, the rounded steel plate and the diamond-shaped steel plate is 0.25-0.5 times the diameter of the vertical main reinforcement of the frame.
[0011] Preferably, a slot for inserting the anchor rod body is provided on the front side of the rock mass.
[0012] Technical effects and advantages of the utility model:
[0013] The utility model utilizes the design of a frame, a connecting assembly and an anchor body, and effectively connects the frame and the anchor body through the connecting assembly, thereby solving the problems of poor connection effect between the frame and the anchor body and complex connection device, and at the same time improves the accuracy of anchor body installation, ensures the overall stability of the frame, improves the support effect of the initial support, and is conducive to eliminating safety hazards in tunnel construction. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the overall connection structure of the utility model.
[0015] Figure 2 It is a schematic diagram of the three-dimensional structure of the connection component of the utility model.
[0016] In the figure: 1. frame; 2. connection assembly; 21. rectangular steel plate; 22. rounded steel plate; 23. diamond steel plate; 24. limit steel plate; 3. anchor body; 4. rock mass. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0018] The utility model provides Figure 1-2 A simple connection device for a steel frame and a locking anchor rod is shown, comprising a frame 1, a rock mass 4 supported by the frame 1 is arranged on the back of the frame 1, anchor rod bodies 3 for connecting the frame 1 and the rock mass 4 are arranged on both sides of the frame 1, and a connecting assembly 2 for connecting the anchor rod body 3 and the frame 1 is arranged on the outside of the frame 1, the connecting assembly 2 comprises an embracing member and symmetrically arranged limiting members, the limiting members comprise a limiting steel plate 24, and the anchor rod body 3 and the limiting steel plate 24 are interlaced.
[0019] Specifically, a slot for inserting the anchor rod body 3 is provided on the front side of the rock mass 4 .
[0020] Furthermore, two slots are provided, which are symmetrically arranged on both sides of the frame 1. After the anchor body 3 is inserted into the slot, grouting is performed into the slot to fix the anchor body 3 to the rock mass 4. The anchor body 3 is a mortar anchor made of a hot-rolled seamless steel pipe with a diameter of 50 mm and a length of 5 m. The number of anchor bodies 3 corresponds to the number of slots. The angle at which the anchor body 3 is inserted into the slot is 30° with the horizontal plane. The frame 1 is a grid steel frame with a horizontal cross-sectional size of 150 mm×150 mm. It is composed of vertical main bars, transverse connecting steel bars and reinforcing steel bars, wherein the vertical main bars and transverse connecting steel bars are HRB400 grade steel bars with diameters of 22 mm and 12 mm, respectively, and the reinforcing steel bars are HPB300 grade steel bars with a diameter of 8 mm.
[0021] Specifically, the embracing member includes a rectangular steel plate 21 and a symmetrically arranged diamond steel plate 23, and the opposite ends of the rectangular steel plate 21 and the diamond steel plate 23 are fixedly connected with a rounded steel plate 22, one side of the diamond steel plate 23 is fixedly connected to one side of the limiting steel plate 24, and the front of one side of the limiting steel plate 24 is provided with a limiting groove for inserting the anchor rod body 3, the vertical cross-section of the limiting groove is a square, and the side length of the limiting groove is 1.1-1.3 times the diameter of the anchor rod body 3, the inclination angle of the diamond steel plate 23 is consistent with the angle of the anchor rod body 3, the transverse cross-section of the rounded steel plate 22 is a quarter arc, the diameter of the arc is 0.5-1 times the diameter of the vertical main reinforcement of the frame 1, and the thickness of the rectangular steel plate 21, the rounded steel plate 22 and the diamond steel plate 23 is 0.25-0.5 times the diameter of the vertical main reinforcement of the frame 1.
[0022] Further, the plate thickness of the rectangular steel plate 21, the rounded steel plate 22 and the diamond steel plate 23 is 10 mm, the inclination angle of the diamond steel plate 23 is 30°, the limiting groove is opened on the side of the limiting steel plate 24 facing the diamond steel plate 23, the side length of the limiting groove is 60 mm, the length of the rectangular steel plate 21 is 100 mm, the radius of the arc of the rounded steel plate 22 is 12.5 mm, the connection between the rectangular steel plate 21, the rounded steel plate 22, the diamond steel plate 23 and the limiting steel plate 24 is welded and fixed, and the parts where the rectangular steel plate 21, the rounded steel plate 22 and the diamond steel plate 23 contact the frame 1 are connected by double-sided fillet welds, and the anchor After the rod body 3 is inserted into the limiting groove, the parts where the anchor rod body 3 contacts the diamond steel plate 23 are connected by double-sided fillet welding, so that the frame 1, the connecting assembly 2 and the anchor rod body 3 are combined into one, forming a stable supporting structure, which has the advantages of simple structure and convenient construction. The use of this connecting device can effectively connect the frame 1 and the anchor rod body 3, solve the problems of poor connection effect between the frame 1 and the anchor rod body 3 and complex connection device, etc., and at the same time improve the accuracy of installation of the anchor rod body 3, ensure the overall stability of the frame 1, improve the support effect of the initial support, and help eliminate safety hazards in tunnel construction.
[0023] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A simple connection device for a steel frame and a locking anchor rod, comprising a frame (1), a rock mass (4) supported by the frame (1) is arranged on the back of the frame (1), and anchor rod bodies (3) for connecting the frame (1) and the rock mass (4) are arranged on both sides of the frame (1), characterized in that: The frame (1) is provided with a connecting assembly (2) for connecting the anchor rod body (3) and the frame (1) on the outside, the connecting assembly (2) comprising an embracing member and symmetrically arranged limiting members, the limiting members comprising a limiting steel plate (24), and the anchor rod body (3) and the limiting steel plate (24) are interlaced.
2. A simple connection device for a steel frame and a locking foot anchor rod according to claim 1, characterized in that: The embracing member comprises a rectangular steel plate (21) and a symmetrically arranged rhombus-shaped steel plate (23), and a rounded steel plate (22) is fixedly connected to opposite ends of the rectangular steel plate (21) and the rhombus-shaped steel plate (23).
3. A simple connection device for a steel frame and a locking foot anchor rod according to claim 2, characterized in that: One side of the diamond-shaped steel plate (23) is fixedly connected to one side of the limiting steel plate (24), and a limiting groove for inserting the anchor rod body (3) is provided on the front side of one side of the limiting steel plate (24).
4. A simple connection device for a steel frame and a locking foot anchor rod according to claim 3, characterized in that: The vertical cross-section of the limiting groove is a square, the side length of the limiting groove is 1.1-1.3 times the diameter of the anchor rod body (3), and the inclination angle of the diamond-shaped steel plate (23) is consistent with the angle of the anchor rod body (3).
5. A simple connection device for a steel frame and a locking foot anchor rod according to claim 2, characterized in that: The transverse cross section of the rounded steel plate (22) is a quarter arc, and the diameter of the arc is 0.5-1 times the diameter of the vertical main reinforcement of the frame (1).
6. A simple connection device for a steel frame and a locking foot anchor rod according to claim 2, characterized in that: The thickness of the rectangular steel plate (21), the rounded steel plate (22) and the diamond-shaped steel plate (23) is 0.25-0.5 times the diameter of the vertical main reinforcement of the frame (1).
7. A simple connection device for a steel frame and a locking foot anchor rod according to claim 1, characterized in that: The front side of the rock mass (4) is provided with a slot for inserting the anchor rod body (3).