Steel member for tunnel supporting system

Abstract

The utility model discloses a steel member for a tunnel support system, which comprises an I-shaped steel body, and the I-shaped steel body comprises an upper flange plate, a lower flange plate and a web plate; a plurality of ribs are at least arranged on the upper surface of the upper flange plate and the lower surface of the lower flange plate; the protruding edges are located on parts of the upper flange plate and the lower flange plate or integrally cover the upper flange plate and the lower flange plate. According to the utility model, the contact area between the steel member and the concrete can be increased, the gripping force and friction force between the steel member and the concrete are improved, the overall effect of the steel member and the concrete is fully exerted, and the stability of the whole tunnel support system is further improved.

Description

Technical Field

[0001] The utility model relates to a tunnel support system, in particular to a steel component for the tunnel support system. Background Art

[0002] In tunnel engineering, various soft rock tunnel construction requires a large number of steel arches as initial support to ensure engineering safety. At present, the most commonly used in tunnel initial support is I-beam.

[0003] However, since the support volume is usually relatively large and the I-beams used for support need to be covered with sprayed concrete, concrete has a strong restraining effect on the steel, which is similar to the enhancement mechanism of the performance of steel in steel-reinforced concrete. Usually only one side is under pressure during the support process; therefore, during the support process, since the surface of the supporting component is a smooth plane or curved surface, it is easy for slippage and loosening to occur between the support system and the concrete structure, which in turn causes the steel component (I-beam) and concrete to fail to effectively play their overall role, affecting the support effect. When the initial support is subjected to uneven pressure in poor geological areas, it is easy for the I-beam support to become unstable and twisted, causing the steel arch frame to lose its supporting function. In severe cases, it may also cause landslides. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present utility model is to provide a steel component for a tunnel support system, which can increase the contact area between the steel component and concrete, improve the grip and friction between the steel component and concrete, give full play to the overall effect of the steel component and concrete, and thus improve the stability of the entire tunnel support system.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is as follows: a steel component for a tunnel support system, including an I-beam body, the I-beam body including an upper flange plate, a lower flange plate and a web plate; characterized in that: a plurality of ridges are provided on at least the upper surface of the upper flange plate and the lower surface of the lower flange plate; the ridges are located in parts of the upper flange plate and the lower flange plate, or cover the upper flange plate and the lower flange plate as a whole.

[0006] Furthermore, ridges are also provided on the lower surface of the upper flange plate and the upper surface of the lower flange plate.

[0007] Furthermore, the convex ribs are in at least two rows distributed along the width direction of the I-beam body, wherein each row of convex ribs includes a plurality of convex ribs distributed at intervals along the length direction of the I-beam body.

[0008] Furthermore, the convex ridge is in a strip shape, and an angle is formed between the convex ridge and the length direction of the I-beam body.

[0009] Furthermore, the inclination directions of two adjacent rows of ridges are opposite.

[0010] Furthermore, the convex ridges are in a herringbone shape, an X shape or a wave shape.

[0011] Furthermore, ridges are also provided on both side surfaces of the web.

[0012] Compared with the prior art, the utility model has the following advantages: convex ridges are arranged on the upper and lower sides and the entire surface of the I-beam, so that after the support system is built and concrete is sprayed, the contact area between the steel member and the concrete can be effectively increased, and the gripping force and friction between the steel member and the concrete can be improved, thereby avoiding slippage and looseness between the steel member and the concrete structure; the overall effect of the steel member and the concrete can be fully utilized, thereby improving the stability of the entire tunnel support system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional view of the utility model.

[0014] Figure 2 It is a top view of an implementation manner of the utility model.

[0015] Figure 3 It is a top view of another embodiment of the utility model.

[0016] In the figure: 1—upper flange plate, 2—lower flange plate, 3—web plate, 4—convex ridge. DETAILED DESCRIPTION

[0017] The utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0019] It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invention product is usually placed when used, which is only for the convenience of describing the present invention 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 of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical", etc. do not mean that the components are absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] Example 1: See Figure 1 , Figure 2 A steel member for a tunnel support system includes an I-beam body, wherein the I-beam body includes an upper flange plate 1, a lower flange plate 2 and a web plate 3. Among them, a plurality of ridges 4 are provided at least on the upper surface of the upper flange plate 1 and the lower surface of the lower flange plate 2; the ridges 4 are located partially on the upper flange plate 1 and the lower flange plate 2, or cover the upper flange plate 1 and the lower flange plate 2 as a whole. In specific implementation, the ridges 4 are at least two rows distributed along the width direction of the I-beam body, wherein each row of ridges 4 includes a plurality of ridges distributed at intervals along the length direction of the I-beam body; in this way, on the same I-beam body, multiple groups of structures that can increase the gripping force can be formed, thereby increasing the connection stability between the steel member and the concrete. In the actual processing process, the ridges 4 in two adjacent rows are staggered, thereby improving the distribution effect of the ridges 4.

[0021] As an optimization, the convex rib 4 is strip-shaped, and there is an angle between the convex rib 4 and the length direction of the I-beam body; further, the inclination directions of two adjacent rows of convex ribs 4 are opposite. In this way, anti-slip can be achieved in the length direction of the I-beam body, and protection can also be achieved in the width direction of the I-beam body, with better effect. During the processing, the cross section of the convex rib 4 is semicircular, trapezoidal or rectangular.

[0022] In specific implementation, ridges 4 are also provided on the lower surface of the upper flange plate 1 and the upper surface of the lower flange plate 2. Ridges 4 are also provided on both sides of the web plate 3. In this way, the surface of the entire I-beam body is arranged with ridges 4, thereby greatly increasing the connection stability between the steel member and the concrete.

[0023] When the steel structure is used to build and support the tunnel support system, a plurality of the above-mentioned steel structures are used; the steel structure is bent into an arc shape, and end plates are respectively provided at both ends of the steel structure, and the end plates on the two adjacent steel structures are connected by bolts. The upper flange plate 1 of the steel structure is in close contact with the surrounding rock (inner wall) of the tunnel; finally, concrete is sprayed on the surrounding rock surface of the tunnel body, and the concrete covers the steel structure with a certain thickness, thereby completing the construction and support of the tunnel support system.

[0024] The convex ridges 4 are arranged on the upper and lower sides and the entire surface of the I-beam. In this way, after the support system is built and concrete is sprayed, the contact area between the steel member and the concrete can be effectively increased, and the gripping force and friction between the steel member and the concrete can be improved, thereby avoiding slippage and looseness between the steel member and the concrete structure; the stability of the steel member can be effectively improved, and then the stability of the entire tunnel support system can be improved.

[0025] Example 2: Participation Figure 3 , which is different from Example 1, the convex ridge 4 is in a herringbone shape, which can further enhance the gripping force between the steel member and the concrete, thereby enhancing the supporting stability of the tunnel support system.

[0026] In specific implementation, the convex ridge 4 in this solution may also be in other forms, including but not limited to X-shape, wave shape, etc., to enhance the support stability of the tunnel support system.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the technical solution. Ordinary technicians in this field should understand that those modifications or equivalent replacements of the technical solution of the utility model without departing from the purpose and scope of the technical solution of the utility model should be included in the scope of the claims of the utility model.

Claims

1. A steel member for a tunnel support system, comprising an I-beam body, wherein the I-beam body comprises an upper flange plate, a lower flange plate and a web plate; characterized in that: At least a plurality of ridges are provided on the upper surface of the upper flange plate and the lower surface of the lower flange plate; the ridges are located partially on the upper flange plate and the lower flange plate, or cover the upper flange plate and the lower flange plate as a whole.

2. A steel member for a tunnel support system according to claim 1, characterized in that: The lower surface of the upper flange plate and the upper surface of the lower flange plate are also provided with ridges.

3. A steel member for a tunnel support system according to claim 1 or 2, characterized in that: The convex ribs are arranged in at least two rows distributed along the width direction of the I-beam body, wherein each row of convex ribs includes a plurality of convex ribs distributed at intervals along the length direction of the I-beam body.

4. A steel member for a tunnel support system according to claim 3, characterized in that: The convex ridge is in a strip shape, and an angle is formed between the convex ridge and the length direction of the I-beam body.

5. A steel member for a tunnel support system according to claim 4, characterized in that: The inclination directions of two adjacent rows of ridges are opposite.

6. A steel member for a tunnel support system according to claim 3, characterized in that: The convex ridges are in a herringbone shape, an X shape or a wave shape.

7. The steel member for a tunnel support system according to claim 1, characterized in that: The two side surfaces of the web are also provided with ridges.

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