A corrugated steel plate foundation joint structure for tunnel reinforcement

Abstract

The application relates to a corrugated steel plate foundation joint structure for tunnel reinforcement, which is used for realizing adjustable and quick connection between a corrugated steel plate and a foundation bracket in a corrugated steel plate reinforced tunnel. The structure comprises a first flange plate arranged at the end of the corrugated steel plate, a second flange plate arranged on the top surface of the foundation bracket, a pre-pressing spring arranged between the first flange plate and the second flange plate, and connecting bolts used for fastening the first flange plate and the second flange plate. Compared with the prior art, the application has the advantages of not occupying the tunnel clearance, good waterproof performance, high rigidity, quick flexibility, good applicability, high construction efficiency and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of tunnel reinforcement repair, in particular to a corrugated steel plate foundation joint structure for tunnel reinforcement. BACKGROUND

[0002] Existing tunnels will inevitably suffer from various complex diseases during their entire life cycle, which will change the material properties of the lining segments to varying degrees. In recent years, corrugated steel structures have gradually been researched and promoted in the field of tunnel repair and reinforcement due to their unique advantages. Using assembled structures for tunnel repair and reinforcement and reasonably designing on-site assembly construction have become a hot and important research topic for relevant personnel.

[0003] Corrugated steel plate has the advantages of high strength, good toughness, and potential for rapid assembly and construction, as it has high strength, good toughness, and potential for rapid assembly and construction. However, due to manufacturing errors and on-site assembly errors, there will be some errors when assembling the corrugated steel plate, which will affect the assembly of the corrugated steel plate reinforcement structure and thus affect the overall stress performance of the corrugated steel plate reinforcement structure. According to engineering experience, the end error | Δ | is generally ≤ 50 mm.

[0004] Currently, in the field of joint assembly, flat washers or spring washers are usually used to balance the errors at the foundation joint. However, when the end error Δ is large, flat washers and spring washers have poor applicability, and the flexibility of the washers is low, making it difficult to perform well under different foundation joint end error conditions. Therefore, a new type of fast foundation joint is needed to compensate for the shortcomings of existing flat washers and spring washers. SUMMARY

[0005] The purpose of the present application is to overcome the shortcomings of the prior art and provide a corrugated steel plate foundation joint structure for tunnel reinforcement.

[0006] The purpose of the present application can be achieved by the following technical solutions:

[0007] A corrugated steel plate foundation joint structure for tunnel reinforcement is used to achieve adjustable and fast connection between the corrugated steel plate and the foundation corbel in a corrugated steel plate reinforced tunnel. The structure includes a first flange plate arranged at the end of the corrugated steel plate, a second flange plate arranged on the top surface of the foundation corbel, a pre-press spring arranged between the first flange plate and the second flange plate, and a connecting bolt for fastening the first flange plate and the second flange plate.

[0008] The connecting bolt passes through the first flange plate, the pre-press spring and the second flange plate in sequence and is fastened to the first flange plate and the second flange plate by a nut, respectively.

[0009] The space between the first flange and the second flange is filled with concrete mortar to ensure the rigidity of the joint.

[0010] The connecting bolts are M20 high-strength bolts.

[0011] The second flange is welded to the top surface of the foundation bracket, and its width is equal to that of the top surface of the foundation bracket.

[0012] The first flange is welded to the end of the corrugated steel plate, and its width is equal to that of the second flange.

[0013] Multiple pre-made bolt holes are sequentially and equidistantly opened on the first and second flanges, for passing through connecting bolts and then being fixed by nuts.

[0014] The bolt holes are oblong holes.

[0015] The corrugated steel plate has a triangular or sinusoidal cross-sectional shape.

[0016] The specific construction steps for this basic joint structure are as follows:

[0017] 1) The corrugated steel plate is positioned by adjusting the gap between the end of the corrugated steel plate and the top surface of the foundation bracket using a preload spring;

[0018] 2) The corrugated steel plate is connected to the foundation bracket by passing the connecting bolts through the first flange, the preload spring and the second flange in sequence and then tightening them with nuts.

[0019] 3) After connection, pour concrete mortar into the gap between the first flange and the second flange and perform standard curing to complete the construction of the foundation joint structure.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1. The flanges of this invention are set at the end face of the corrugated steel plate and the top surface of the foundation bracket, without occupying the tunnel clearance, and the cast-in-place concrete mortar between the flanges ensures the waterproof performance of the foundation joint.

[0022] Second, this invention can meet different termination errors, has good flexibility, and effectively makes up for the shortcomings of flat washers and spring washers. At the same time, the cast-in-place concrete mortar also ensures the rigidity of the foundation joint.

[0023] Third, the basic joint provided by this invention is characterized by speed, flexibility and good applicability, which can significantly improve construction efficiency and reduce manpower, material and time costs, and has good social and economic benefits. Attached Figure Description

[0024] Figure 1 A schematic diagram of the basic cow leg structure.

[0025] Figure 2 This is a schematic diagram showing the assembly and termination errors of corrugated steel plates.

[0026] Figure 3 This is a schematic diagram of the quick-connect base connector of the present invention.

[0027] Figure 4 This is a schematic diagram showing the opening position of the end flange of a corrugated steel plate with a triangular wave cross-section.

[0028] Figure 5 This is a schematic diagram showing the opening position of the end flange of a corrugated steel plate with a sinusoidal cross-section.

[0029] Explanation of markings in the diagram:

[0030] 1. Corrugated steel plate termination, 2. Foundation bracket, 3. First flange, 4. Second flange, 5. Bolt hole, 6. Preload spring, 7. Connecting bolt, 8. Cast-in-place concrete mortar. Detailed Implementation

[0031] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0032] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0033] It should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0034] Example

[0035] like Figure 1 and Figure 2 As shown, due to the prefabrication error of the corrugated steel plate and the on-site assembly construction error, there is a termination error Δ when the corrugated steel plate is actually assembled and constructed. That is, there is a gap between the termination end 1 of the corrugated steel plate and the top of the foundation bracket 2, making it impossible to use flat washers and spring washers with non-adjustable thickness.

[0036] like Figure 3As shown, the present invention provides a corrugated steel plate foundation joint structure for tunnel reinforcement, which enables rapid connection between the corrugated steel plate and the foundation bracket 2 in the corrugated steel plate reinforced tunnel. The joint structure includes a first flange 3 welded to the end 1 of the corrugated steel plate, a second flange 4 welded to the top surface of the foundation bracket 2, a preload spring 6, connecting bolts 7, and concrete mortar 8.

[0037] The structure is constructed by welding a first flange 3 at the end 1 of the corrugated steel plate and a second flange 4 to the top of the foundation bracket 2 of the shield tunnel. A pre-compression spring 6 is installed between the first flange 3 and the second flange 4 for pre-fixation. Then, connecting bolts 7 (M20 high-strength bolts are used in this example) are passed through the first flange 3, the pre-compression spring 6 and the second flange 4 in sequence to connect the corrugated steel plate and the foundation bracket 2. Finally, concrete mortar 8 is poured on site between the first flange 3 and the second flange 4 and standard curing is carried out.

[0038] In this example, the widths of the first flange 3 welded to the end 1 of the corrugated steel plate and the second flange welded to the top surface of the foundation bracket 2 should be equal and equal to the width of the top surface of the foundation bracket 2.

[0039] Multiple bolt holes 5 are pre-drilled on the first flange 3 and the second flange 4, and the bolt holes 5 are in the form of oblong holes.

[0040] like Figure 4 and Figure 5 As shown, the corrugated steel plate can adopt a triangular wave cross section or a sine wave cross section. The figure shows the opening positions on the first flange 3 and the second flange 4. The openings are in the form of waist-shaped holes and are arranged equidistantly along a straight line, avoiding the connection positions of the corrugated steel plate.

[0041] The construction steps for this joint structure are as follows:

[0042] (a) Positioning the corrugated steel plate using the preloaded spring 6;

[0043] (b) The corrugated steel plate and the foundation bracket 2 are connected by M20 high-strength bolts;

[0044] (c) Pour concrete mortar 8 into the gap between the first flange 3 and the second flange 4 and perform standard curing.

[0045] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A corrugated steel plate foundation joint structure for tunnel reinforcement, used to achieve an adjustable and quick connection between the corrugated steel plate and the foundation bracket (2) in a corrugated steel plate reinforced tunnel, characterized in that, The structure includes a first flange (3) set at the end (1) of the corrugated steel plate, a second flange (4) set on the top surface of the foundation bracket (2), a preload spring (6) set between the first flange (3) and the second flange (4), and connecting bolts (7) for fastening the first flange (3) and the second flange (4); the space between the first flange (3) and the second flange (4) is filled with concrete mortar (8) to ensure the rigidity of the joint. The specific construction steps for this basic joint structure are as follows: 1) The gap between the end (1) of the corrugated steel plate and the top surface of the foundation bracket (2) is adjusted by the preload spring (6) to achieve the positioning of the corrugated steel plate; 2) The corrugated steel plate is connected to the foundation bracket (2) by passing the connecting bolts through the first flange (3), the preload spring (6) and the second flange (4) in sequence and then tightening them with nuts; the connecting bolts pass through the first flange (3), the preload spring (6) and the second flange (4) in sequence and then tighten them with nuts to the first flange (3) and the second flange (4) respectively. 3) After connection, pour concrete mortar (8) into the gap between the first flange (3) and the second flange (4) and perform standard curing to complete the construction of the foundation joint structure.

2. The corrugated steel plate foundation joint structure for tunnel reinforcement according to claim 1, characterized in that, The connecting bolt (7) is an M20 high-strength bolt.

3. The corrugated steel plate foundation joint structure for tunnel reinforcement according to claim 1, characterized in that, The second flange (4) is welded to the top surface of the base bracket (2), and its width is equal to that of the top surface of the base bracket (2).

4. A corrugated steel plate foundation joint structure for tunnel reinforcement according to claim 3, characterized in that, The first flange (3) is welded to the end (1) of the corrugated steel plate, and its width is equal to that of the second flange (4).

5. A corrugated steel plate foundation joint structure for tunnel reinforcement according to claim 4, characterized in that, Multiple pre-made bolt holes (5) are sequentially and equidistantly opened on the first flange (3) and the second flange (4) for passing through connecting bolts and then being fixed by nuts.

6. A corrugated steel plate foundation joint structure for tunnel reinforcement according to claim 5, characterized in that, The bolt hole (5) is a waist-shaped hole.

7. A corrugated steel plate foundation joint structure for tunnel reinforcement according to claim 1, characterized in that, The corrugated steel plate has a triangular or sinusoidal cross-sectional shape.

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