Steel frame locking foot structure of gas tunnel

Abstract

The utility model discloses a gas tunnel steel frame locking foot structure which comprises a fixing bottom plate and two fixing auxiliary plates, the fixing bottom plate is arranged at the bottom of an I-shaped steel frame, and the two fixing auxiliary plates are arranged on the upper sides of bottom wing plates of the fixing bottom plate respectively. Each fixing auxiliary plate is connected with the fixing bottom plate through at least two outer side bolt pieces and at least two inner side bolt pieces, and connecting through holes matched with the inner side bolt pieces are formed in the side edge of the bottom of the fixing bottom plate. A foot-lock anchor pipe is arranged between the middle of each fixing auxiliary plate and the fixing bottom plate. By increasing the contact area of the locking foot and the steel frame, the reliability of the steel frame locking foot is enhanced, meanwhile, the locking foot anchor pipe and the steel frame are connected in an anchoring mode through the bolts, and the safety of gas tunnel steel frame construction operation is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to tunnel support technical field, concretely relates to a gas tunnel steel frame lock foot structure. BACKGROUND

[0002] In the gas tunnel construction process, strictly controlling the fire source is one of the main means to prevent gas explosion, and the connection between the steel frame and the lock foot anchor rod is generally welded in the hole during the construction of the conventional steel frame lock foot structure. Welding operation in the gas tunnel for a long time may cause certain safety hazards, resulting in that the lock foot structure using welding operation is not high in practicality. At the same time, the action principle of the previous steel frame lock foot structure is that one end of the lock foot anchor pipe is fixed with the steel frame to form an integral whole, and the other end of the lock foot anchor pipe is tightly fastened with the surrounding rock mass to realize the functions of stabilizing the steel frame arch foot and tunnel advance support.

[0003] At present, there are two connection modes of the lock foot anchor pipe and the steel frame adopted in the construction, one is directly welded into shape, and the other is anchored through bolts. In the two methods, the connection position of the lock foot anchor pipe and the steel frame is on the outside of the I-shaped steel leg, and the contact area of the two is small, which is affected by the welding and anchoring process. In the construction process, the connection strength and stability of the lock foot anchor pipe and the steel frame are difficult to control. The foregoing tunnel steel frame lock foot pipe construction method is difficult to meet the current safe, efficient and rapid construction requirements. Therefore, in view of the foregoing problems, it is necessary to provide a gas tunnel steel frame lock foot structure. SUMMARY

[0004] In view of the above shortcomings of the prior art, the utility model provides a gas tunnel steel frame lock foot structure.

[0005] To achieve the above-mentioned purposes, the utility model adopts the following technical scheme: cooperating with the I-shaped steel frame, including a fixed bottom plate and two fixed vice plates, the fixed bottom plate is arranged at the bottom of the I-shaped steel frame, and the two fixed vice plates are arranged on the upper side of the bottom flange of the fixed bottom plate; each fixed vice plate is connected with the fixed bottom plate through at least two outer side bolt pieces and at least two inner side bolt pieces, and the bottom side of the fixed bottom plate is provided with a connecting through hole matched with the inner side bolt piece; a matched anchor pipe hole is arranged between the middle of each fixed vice plate and the fixed bottom plate, and a lock foot anchor pipe is fixed in the anchor pipe hole.

[0006] Further, the outer part of the lock foot anchor pipe is fixed with a steel frame anchor pipe limiting ring plate, and the steel frame anchor pipe limiting ring plate is arranged between the fixed vice plate and the fixed bottom plate.

[0007] Further, the thickness of the steel frame anchor pipe limiting ring plate is less than or equal to the thickness of the bottom of the I-shaped steel frame.

[0008] Further, the outer side bolt piece and the inner side bolt piece are the same in structure, and the outer side bolt piece comprises a bolt and a nut.

[0009] Further, the fixed bottom plate is provided with upper through holes matched with the outer side bolt and the inner side bolt, and the fixed sub-plate is provided with lower through holes matched with the outer side bolt and the inner side bolt.

[0010] Further, each fixed sub-plate is connected with the fixed bottom plate through two outer side bolts and two inner side bolts, and the two outer side bolts and the two inner side bolts are arranged at four corners of the fixed sub-plate.

[0011] Further, the fixed sub-plate and the fixed bottom plate are both rectangular plates.

[0012] Further, the thickness of the fixed sub-plate and the fixed bottom plate is greater than or equal to the thickness of the bottom wing plate of the I-shaped steel frame.

[0013] The utility model discloses the beneficial effects are:

[0014] The utility model discloses the fixed bottom plate sets up in I-shaped steel frame bottom, and two fixed sub-plates set up on the upside of I-shaped steel frame bottom wing plate, and each fixed sub-plate outside is fixedly connected with the fixed bottom plate through at least two outer side bolts, and each fixed sub-plate inside is connected and fixed with the fixed bottom plate and I-shaped steel frame through at least two inner side bolts, and the inner side bolt is connected and fixed together with I-shaped steel frame, fixed sub-plate, fixed bottom plate and fixed bottom plate, and the connection is reliable, and the connection contact area is greater. The lock foot anchor pipe is fixed in the fixed sub-plate and the fixed sub-plate through the steel frame anchor pipe spacing ring plate, thereby cooperating the anchor rod and better fixing I-shaped steel frame.

[0015] The utility model discloses the beneficial effects are:

[0016] The utility model discloses the beneficial effects are: BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is the front view of the utility model;

[0018] Fig. 2 It is the bottom view of the utility model;

[0019] Fig. 3 It is the structure whole schematic diagram of the utility model;

[0020] Fig. 4This is an exploded view of the present invention;

[0021] The symbols for each component are as follows:

[0022] 1. I-beam steel frame; 2. Fixed sub-plate; 3. Fixed base plate; 4. Locking foot anchor pipe; 5. Bolt; 6. Nut; 7. Steel frame anchor pipe limiting ring plate. Detailed Implementation

[0023] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0024] like Figs. 1 to 4 As shown, the gas tunnel steel frame locking structure is used in conjunction with the I-beam steel frame 1. The gas tunnel steel frame locking structure includes a fixed base plate 3 and two fixed auxiliary plates 2. The fixed base plate 3 is located at the bottom of the I-beam steel frame 1, and the two fixed auxiliary plates 2 are respectively located on the upper side of the bottom flange of the fixed base plate 3. Each fixed auxiliary plate 2 is connected to the fixed base plate 3 by at least two outer bolts and at least two inner bolts. The outer bolts and inner bolts have the same structure, and the outer bolts include bolts 5 and nuts 6. The bottom edge of the fixed base plate 3 is provided with a connecting through hole that mates with the inner bolts. The fixed base plate 3 is provided with an upper through hole that mates with the outer and inner bolts, and the fixed auxiliary plate 2 is provided with a lower through hole that mates with the outer and inner bolts.

[0025] Each fixed sub-plate 2 has a matching anchor hole between its center and the fixed base plate 3, and a locking anchor pipe 4 is fixed inside the anchor hole. A steel frame anchor pipe limiting ring plate 7 is fixed to the outside of the locking anchor pipe 4. The locking anchor pipe 4 and the steel frame anchor pipe limiting ring plate 7 are integrally formed, or the steel frame anchor pipe limiting ring plate 7 can be fixed to the outside of the locking anchor pipe 4 by welding. The steel frame anchor pipe limiting ring plate 7 is located between the fixed sub-plate 2 and the fixed base plate 3. The thickness of the steel frame anchor pipe limiting ring plate 7 is preferably less than or equal to the bottom thickness of the I-shaped steel frame 1. The steel frame anchor pipe limiting ring plate 7 is preferably circular or rectangular.

[0026] Each fixed vice plate 2 and fixed bottom plate 3 are connected by two outer side bolt pieces and two inner side bolt pieces, which are evenly arranged at the four corners of the fixed vice plate 2. The fixed vice plate 2 and the fixed bottom plate 3 are preferably rectangular plates, and the rectangular fixed vice plate 2 has a large area of adhesion with the bottom flange of the I-shaped steel frame 1, facilitating the fixed connection of the fixed vice plate 2 with the bottom of the I-shaped steel frame 1. The thickness of the fixed vice plate 2 and the fixed bottom plate 3 is greater than or equal to the thickness of the bottom flange of the I-shaped steel frame 1, ensuring the fixed connection effect of the fixed vice plate 2 and the fixed bottom plate 3 on the bottom flange of the I-shaped steel frame 1.

[0027] Working process and principle: as shown in Fig. 4 To improve the safety of tunnel construction, the I-shaped steel frame 1 is erected at the same time as the tunnel excavation. In order to improve the structural safety and stability of the I-shaped steel frame 1, a lock foot anchor pipe 4 is added near the arch foot of the steel frame. In this embodiment, the lock foot anchor pipe 4 and the steel frame anchor pipe limiting ring plate 7 are welded together in advance when the lock foot anchor pipe 4 is installed. The steel frame anchor pipe limiting ring plate 7 serves to increase the friction area of the steel frame anchor pipe 4 with the fixed bottom plate 3 and the fixed vice plate 2. Then, the fixed bottom plate 3 is installed, and the fixed bottom plate 3 is connected with the reserved connecting through hole of the bottom flange of the I-shaped steel frame 1 through the inner side bolt piece, and the inner side bolt piece is fixed by the bolt 5 and the nut 6. Subsequently, the steel frame anchor pipe 4 and the two fixed vice plates 2 are installed simultaneously, the steel frame anchor pipe 4 passes through the fixed bottom plate 3 and the fixed vice plate 2 and is tightly adhered by the strong friction force among them. At the same time, the fixed vice plate 2 is anchored with the I-shaped steel frame 1 at the steel flange through the inner side bolt piece.

Claims

1. A gas tunnel steel frame locking foot structure used in cooperation with an I-shaped steel frame (1), characterized in that, It comprises a fixed bottom plate (3) and two fixed vice plates (2), the fixed bottom plate (3) is arranged at the bottom of the I-shaped steel frame (1), and the two fixed vice plates (2) are arranged on the upper side of the bottom flange of the fixed bottom plate (3); Each fixed vice plate (2) is connected with the fixed bottom plate (3) through at least two outer bolts and at least two inner bolts, and the bottom side of the fixed bottom plate (3) is provided with a connecting through hole matched with the inner bolt; The middle part of each fixed vice plate (2) and the fixed bottom plate (3) are provided with matched anchor pipe holes, and the anchor pipe holes are fixed with lock foot anchor pipes (4).

2. The gas tunnel steel frame lock foot structure according to claim 1, characterized in that, The outer part of the lock foot anchor pipe (4) is fixed with a steel frame anchor pipe limiting ring plate (7), which is arranged between the fixed vice plate (2) and the fixed bottom plate (3).

3. The gas tunnel steel frame lock foot structure according to claim 2, characterized in that, The thickness of the steel frame anchor pipe limiting ring plate (7) is less than or equal to the thickness of the bottom of the I-shaped steel frame (1).

4. The gas tunnel steel frame lock foot structure according to claim 1, characterized in that, The outer bolt and the inner bolt are the same structure, and the outer bolt comprises a bolt (5) and a nut (6).

5. The gas tunnel steel frame lock foot structure according to claim 1, characterized in that, The fixed bottom plate (3) is provided with an upper through hole matched with the outer bolt and the inner bolt, and the fixed vice plate (2) is provided with a lower through hole matched with the outer bolt and the inner bolt.

6. The gas tunnel steel frame lock foot structure according to claim 1, wherein Each fixed vice plate (2) and the fixed bottom plate (3) are connected through two outer bolts and two inner bolts, and the two outer bolts and the two inner bolts are evenly arranged at the four corners of the fixed vice plate (2).

7. The gas tunnel steel frame lock foot structure according to claim 1, characterized in that, The fixed vice plate (2) and the fixed bottom plate (3) are both rectangular plates.

8. The gas tunnel steel frame lock foot structure according to claim 1, characterized in that, The thickness of the fixed vice plate (2) and the fixed bottom plate (3) is greater than or equal to the thickness of the bottom flange of the I-shaped steel frame (1).

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