Variable cross-section reinforced flexible shed tunnel protection system

Abstract

The utility model discloses a variable cross-section reinforced flexible shed tunnel protection system, and relates to the technical field of protection engineering, the variable cross-section reinforced flexible shed tunnel protection system comprises a foundation, a variable cross-section arch frame beam and a protection net structure, and the foundation is used for installing the shed tunnel protection system on an engineering structure surface; the variable cross-section arch frame beams are installed on the foundation, each variable cross-section arch frame beam comprises a variable cross-section section located on the arch crown portion and uniform cross-section sections symmetrically arranged on the two sides of the variable cross-section section, and the radial width of each variable cross-section section is larger than that of each uniform cross-section section; and the protective net structure is arranged on the variable cross-section arch frame beam. The section of the arch crown part is improved, reinforced variable section transition is adopted in the span of the arch ring, the problem that the interface bearing capacity of the arch crown is low can be well solved, and meanwhile the purposes of saving materials and optimizing the structure can be achieved.

Description

Technical Field

[0001] The present application relates to the field of protective engineering technology, and in particular to a variable-section reinforced flexible shed tunnel protection system. Background Art

[0002] like Figure 1 The figure shows a schematic diagram of the steel arch structure of a traditional flexible shed tunnel. It is not difficult to find that the traditional flexible shed tunnel uses steel sections of equal cross-section as the main arch frame. When encountering a large cross-sectional span or a high protection level, the main arch frame is prone to problems such as excessive mid-span bending moment and insufficient arch frame bearing capacity. At this time, if the bearing capacity of the shed tunnel is to be increased, it has to be solved by increasing the steel cross-section, which is bound to lead to a certain degree of material waste.

[0003] In addition, if Figure 2 The figure shows a top view of a traditional flexible shed tunnel. It is not difficult to find that the support rod system of the traditional flexible shed tunnel is arranged in an "X" shape with a cross in the middle, which results in a large number of cross nodes in the middle of the rods. This is not conducive to the overall force coordination of the structural system, nor is it conducive to construction and installation, and has a certain impact on the construction period and quality.

[0004] Secondly, traditional flexible shed tunnels are mostly rigid structures formed by concrete or steel structures. They usually rely on the bearing capacity of the material itself to directly intercept and protect against falling rocks, which easily causes large internal forces inside the structure, often resulting in larger size and self-weight of the structure itself, longer construction period, and greater requirements for the bearing capacity of the foundation. Utility Model Content

[0005] The main purpose of this application is to provide a variable-section reinforced flexible shed tunnel protection system, aiming to solve the above-mentioned technical problems.

[0006] The technical solutions adopted in this application are as follows:

[0007] A variable-section reinforced flexible shed tunnel protection system, comprising:

[0008] Foundation, used to install the shed tunnel protection system on the engineering structure surface;

[0009] Variable-section arch beams, a plurality of said variable-section arch beams are installed on the foundation, said variable-section arch beams comprising a variable-section segment at the top of the arch and symmetrically arranged equal-section segments on both sides of said variable-section segment, wherein the radial width of said variable-section segment is greater than the radial width of said equal-section segment;

[0010] A protective net structure is arranged on the variable-section arch beam.

[0011] Optionally, the variable cross-section segment includes a connecting segment with the same cross-section as the constant cross-section segment and a reinforcing segment located inside the connecting segment and with the same curvature as the connecting segment, and both ends of the reinforcing segment are inclined and transitionally connected to the connecting segment.

[0012] Optionally, support rods are provided between the variable-section arch beams, and the support rods include continuous V-shaped support rods and I-shaped support rods provided inside the V-shaped support rods.

[0013] Optionally, the protective net structure includes a double-layer flexible net composed of a ring net and a twisted hexagonal net, and the protective net structure is fixed to the variable-section arch beam through a connecting piece.

[0014] Optionally, the connecting member includes a pressure plate for pressing the protective net structure onto the variable-section arch beam and a bolt for fastening the pressure plate to the variable-section arch beam.

[0015] Optionally, the variable-section reinforced flexible shed tunnel protection system further includes side beams, which are arranged at both ends of the variable-section arch beams and are used to connect the variable-section arch beams on the same side in series.

[0016] Optionally, the variable-section arch beams at both ends and the side beams on both sides are provided with edge ropes for fixing the edges of the protective net structure.

[0017] Optionally, the length of the variable cross-section segment is at least one third of the width of the road spanned by the tunnel protection system.

[0018] Optionally, the variable-section arch beams are arranged at equal distances.

[0019] Optionally, a pedestal is provided on the foundation, and the variable-section arch beam is assembled in the pedestal.

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

[0021] The embodiment of the present application proposes a variable-section reinforced flexible shed tunnel protection system, which improves the cross-section of the arch top and adopts a reinforced variable-section transition in the middle span of the arch ring, thereby effectively solving the problem of low bearing capacity of the arch top interface and achieving the purpose of saving materials and optimizing the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the steel arch structure of a traditional flexible shed tunnel;

[0023] Figure 2 This is a top view of a traditional flexible shed tunnel;

[0024] Figure 3 An axonometric diagram of the variable-section reinforced flexible shed tunnel protection system provided in an embodiment of the present application;

[0025] Figure 4 It is a structural diagram of a variable-section arch beam;

[0026] Figure 5 A top view of the variable-section reinforced flexible shed tunnel protection system provided in an embodiment of the present application;

[0027] Figure 6 A side view of a variable-section reinforced flexible shed tunnel protection system provided in an embodiment of the present application;

[0028] Figure 7 This is a schematic diagram of the installation structure of the protective net structure.

[0029] Description of the reference numerals in the accompanying drawings:

[0030] 1-foundation, 101-base, 2-variable-section arch beam, 201-constant-section section, 202-variable-section section, 2020-connecting section, 2021-reinforcement section, 3-protective net structure, 301-ring net, 302-twisted hexagonal net, 4-I-shaped support rod, 5-V-shaped support rod, 6-side beam, 7-pressure plate, 8-bolt, 9-edge rope. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0032] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In this application, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0035] Refer to the attached Figures 3 and 4 As shown, an embodiment of the present application provides a variable-section reinforced flexible shed tunnel protection system, comprising a foundation 1, a variable-section arch beam 2, and a protective net structure 3. The foundation 1 is a concrete structure cast on a structural surface, and is used to install the shed tunnel protection system on the structural surface, including but not limited to a road surface, a bridge, etc. A base 101 is cast or installed on the foundation 1, and is used to install the variable-section arch beam 2. Multiple variable-section arch beams 2 are assembled on the base 101 at equal intervals. The variable-section arch beam 2 includes a variable-section segment 202 located at the top of the arch and symmetrically arranged constant-section segments 201 on both sides of the variable-section segment 202. The radial width of the variable-section segment 202 is greater than the radial width of the constant-section segment 201, and the length of the variable-section segment 202 is at least one-third of the width of the road spanned by the shed tunnel protection system, so that the top of the arch is occupied by the variable-section segment 202. The protective net structure 3 is laid on the variable-section arch beam 2.

[0036] In this embodiment, by increasing and improving the cross-section of the arch top of the steel arch frame and adopting a reinforced variable cross-section transition in the middle of the arch ring span, the problem of low bearing capacity of the arch top interface can be better solved, and the stronger bearing capacity can be improved. It can better cope with the use scenarios with large cross-sectional spans or high protection energy levels, thereby achieving the purpose of saving materials and optimizing the structure to a certain extent.

[0037] In one embodiment, to provide an enhanced arch structure, such as Figure 3As shown, the variable cross-section segment 202 includes a connecting segment 2020 having the same cross-section as the equal cross-section segment 201 and a reinforcing segment 2021 located on the inner side of the connecting segment 2020 and having the same arc as the connecting segment 2020. The connecting segment 2020 and the equal cross-section segment 201 are integrally formed and have the same arc radius. The reinforcing segment 2021 and the connecting segment 2020 are integrally formed, and both ends of the reinforcing segment 2021 are inclined and transitionally connected to the connecting segment 2020, thereby forming a variable cross-section segment 202 having a larger radial width than the equal cross-section segment 201, thereby improving the bearing capacity of the steel arch frame.

[0038] In order to avoid the problem of using traditional X-shaped support rods, which would cause more cross nodes in the middle of the rods, which is not conducive to the overall force coordination of the structural system and is not conducive to construction and installation, such as Figure 5 and Figure 6 As shown, in this embodiment, support rods are arranged between the variable-section arch beams 2, and the support rods include a continuous V-shaped support rod 5 and an I-shaped support rod 4 arranged on the inner side of the V-shaped support rod 5, and the I-shaped support rod 4 is located at the center of the V-shaped support rod 5.

[0039] It can be found that by combining the longitudinal support of I-shaped support rods 4 with the diagonal support of continuous V-shaped support rods 5 between the steel arch frames, the layout of the support rod system is optimized and adjusted, avoiding the generation of cross nodes in the middle, improving structural stability, facilitating the transportation and installation of support components, and at the same time improving construction efficiency and shortening construction period.

[0040] In addition, in this embodiment, Figure 4 and Figure 5 As shown, the protective net structure 3 includes a double-layer flexible net composed of a ring net 301 and a twisted hexagonal net 302. The protective net structure 3 is fixed to the variable cross-section arch beam 2 through a connecting piece. Figure 7 As shown, the connecting parts include a pressing plate 7 and a bolt 8. The pressing plate 7 clamps and presses the double-layer flexible protective net structure 3 on the variable-section arch beam 2, and the pressing plate 7 is connected and fixed to the variable-section arch beam 2 by the bolt 8.

[0041] As can be understood, based on the principle of energy matching, multiple layers of flexible protective netting are laid above the arch structure and fixed to the arch structure using a connection method such as a pressure plate 7 and bolts 8. The flexible metal netting and the rigid structural frame form a flexible shed tunnel structure system that combines both rigidity and flexibility. This flexible shed tunnel structure has the characteristics of light weight, convenient construction, shortened construction time, and low cost, and has more significant social and economic benefits than traditional shed tunnels.

[0042] In one embodiment, in order to complete the edge fixing of the protective net on the arch frame, as shown in FIG. Figure 3 and 4As shown, the shed tunnel protection system also includes side beams 6. The side beams 6 are two parallel side beams, which are respectively arranged at the two ends of the variable-section arch frame beam 2, and are used to connect the variable-section arch frame beams 2 on the same side in series, which can increase the stability of the entire system to a certain extent. At the same time, after the protective net structure 3 is laid on the variable-section arch frame beam 2, the two ends and the bottom end are respectively trimmed with the variable-section arch frame beams 2 at both ends and the side beams 6 on both sides, and the protective net structure 3 is fixed to the variable-section arch frame beams 2 at both ends and the side beams 6 on both sides by the trimming rope 9, so that the entire protective net is laid on the arch frame.

[0043] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A variable-section reinforced flexible shed tunnel protection system, characterized in that: include: Foundation, used to install the shed tunnel protection system on the engineering structure surface; Variable-section arch beams, a plurality of said variable-section arch beams are installed on the foundation, said variable-section arch beams comprising a variable-section segment at the top of the arch and symmetrically arranged equal-section segments on both sides of said variable-section segment, wherein the radial width of said variable-section segment is greater than the radial width of said equal-section segment; A protective net structure is arranged on the variable-section arch beam.

2. The variable cross-section reinforced flexible shed tunnel protection system according to claim 1 is characterized in that: The variable cross-section segment includes a connecting segment with the same cross-section as the constant cross-section segment and a reinforcing segment located inside the connecting segment and with the same arc as the connecting segment. Both ends of the reinforcing segment are inclined and transitionally connected to the connecting segment.

3. The variable cross-section reinforced flexible shed tunnel protection system according to claim 1 is characterized in that: Support rods are arranged between the variable-section arch beams, and the support rods include continuous V-shaped support rods and I-shaped support rods arranged inside the V-shaped support rods.

4. The variable cross-section reinforced flexible shed tunnel protection system according to claim 1 is characterized in that: The protective net structure comprises a double-layer flexible net consisting of a ring net and a double-twisted hexagonal net, and the protective net structure is fixed to the variable-section arch beam through a connecting piece.

5. The variable cross-section reinforced flexible shed tunnel protection system according to claim 4 is characterized in that: The connecting member includes a pressure plate for pressing the protective net structure onto the variable-section arch beam and a bolt for fastening the pressure plate to the variable-section arch beam.

6. The variable cross-section reinforced flexible shed tunnel protection system according to claim 1 is characterized in that: It also includes side beams, which are arranged at both ends of the variable-section arch beams and are used to connect the variable-section arch beams on the same side in series.

7. The variable cross-section reinforced flexible shed tunnel protection system according to claim 6 is characterized in that: The variable-section arch beams at both ends and the side beams on both sides are provided with edge-closing ropes for fixing the edges of the protective net structure.

8. The variable cross-section reinforced flexible shed tunnel protection system according to claim 1 is characterized in that: The length of the variable cross-section section is at least one third of the width of the road spanned by the shed tunnel protection system.

9. The variable cross-section reinforced flexible shed tunnel protection system according to claim 1 is characterized in that: The variable-section arch beams are arranged at equal distances from each other.

10. The variable cross-section reinforced flexible shed tunnel protection system according to claim 1, characterized in that: A pedestal is provided on the foundation, and the variable-section arch beam is assembled in the pedestal.

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