Tunnel open cut tunnel lining structure

Abstract

The utility model discloses a tunnel open cut tunnel lining structure which comprises an annular section formed by combining an arch ring section, a side wall section and an inverted arch section. The arch ring section is of a wave-shaped structure and comprises horizontal sections arranged horizontally and vertical sections arranged vertically, and the horizontal sections and the vertical sections are alternately combined and connected in the length direction of the tunnel. The arch ring section of the wave-shaped structure can well disperse stress concentration of loads, and the bearing capacity of the structure is improved. The whole structure has good flexibility, adverse effects caused by foundation disturbance and base stress can be reduced, and the shock resistance of the structure is greatly improved; the generation of longitudinal cracks of the lining can be effectively reduced; and the structural stability and the service life of the tunnel open cut tunnel lining structure are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel open hole engineering, in particular to a tunnel open hole lining structure. Background Art

[0002] As an important structure in the construction of highway and railway networks, tunnels play an increasingly important role in improving the alignment of the road network, improving the route grade, shortening mileage and driving time, ensuring driving safety, and improving operational efficiency. However, a series of engineering quality problems that occurred during the construction and use of tunnels not only caused huge economic losses, but also threatened driving safety. Cracks, corrosion, damage and other diseases in the tunnel lining structure are the most critical factors causing quality problems in tunnels after completion. Domestic and foreign investigations and studies have shown that a considerable proportion of tunnel lining structures have cracks, deformation, block drop and water leakage due to weak bearing capacity and poor stability. The existence of diseases will affect traffic quality, threaten the safety of driving in the tunnel, greatly shorten the maintenance cycle and service life of the tunnel, and bring about expensive repair, maintenance and reinforcement work in the later stage. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a tunnel open hole lining structure with good structural stability.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: a tunnel open hole lining structure, the annular cross-section includes an arch ring section, a side wall section and an inverted arch section; the arch ring section is a corrugated structure, the arch ring section includes a horizontal section arranged horizontally and a vertical section arranged vertically, and the horizontal section and the vertical section are alternately combined and connected along the length direction of the tunnel.

[0005] As a further improvement of the above solution:

[0006] The arch ring section, side wall section and invert arch section are constructed of ultra-high performance concrete.

[0007] The arch ring section, side wall section and invert arch section are constructed of active fly ash ultra-high performance concrete.

[0008] The horizontal section and the vertical section have the same thickness.

[0009] The thickness of the horizontal segment and the vertical segment is set to h, 50mm≤h≤150mm.

[0010] The length of the horizontal section is set to L, 500mm≤L≤1500mm; the height of the vertical section is set to H, 500mm≤H≤1500mm.

[0011] The vertical section comprises a convex section and a concave section which can be mutually engaged and spliced ​​along the length direction of the tunnel.

[0012] The convex part of the convex section is provided with embedded steel bars or steel sections on both side walls along the tunnel width direction; the concave part of the concave section is provided with embedded steel bars or steel sections on both side walls along the tunnel width direction.

[0013] Compared with the prior art, the advantages of the utility model are:

[0014] The utility model proposes a tunnel open hole lining structure, in which the arch ring section is set as a corrugated structure, forming a composite structure combining an arch structure and a corrugated structure. The arch ring section of the corrugated structure can better disperse the stress concentration of the load, thereby improving the bearing capacity of the structure itself. The longitudinal folding effect of the corrugated structure makes the arch ring section have low longitudinal stiffness, strong deformation resistance, strong foundation adaptability, and good overall flexibility, which can reduce the adverse effects of foundation disturbance and base stress and greatly improve the seismic resistance of the structure. The arch ring section of the corrugated structure also has great annular rigidity. The wavy setting increases the bending moment and the height of the compression zone of the lining structure, improves the bearing capacity of the lining structure, and can effectively reduce the generation of longitudinal cracks in the lining. The structural stability and service life of the tunnel open hole lining structure are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the annular cross-section structure of the open-cut tunnel lining structure in the embodiment.

[0016] Figure 2 yes Figure 1 AA cross-section diagram in.

[0017] Figure 3 yes Figure 2 Middle BB section.

[0018] The symbols in the figure represent:

[0019] 1. Arch ring section; 2. Side wall section; 3. Inverted arch section; 4. Vertical section; I. Convex section; II. Concave section; 5. Horizontal section. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] Figures 1 to 3An embodiment of a tunnel open hole lining structure of the utility model is shown, wherein the annular cross section comprises an arch ring section 1, a side wall section 2 and an inverted arch section 3; the arch ring section 1 is a corrugated structure, and the arch ring section 1 comprises a horizontal section 5 arranged horizontally and a vertical section 4 arranged vertically, and the horizontal section 5 and the vertical section 4 are alternately combined and connected along the length direction of the tunnel. In the structure, the arch ring section 1 is arranged as a corrugated structure, forming a combined structure combining an arch structure and a corrugated structure, and the arch ring section 1 of the corrugated structure can better disperse the stress concentration of the load, thereby improving the bearing capacity of the structure itself. The longitudinal folding effect of the corrugated structure makes the arch ring section 1 have low longitudinal stiffness, strong anti-deformation ability, strong foundation adaptability, good overall flexibility, can reduce the adverse effects caused by foundation disturbance and base stress, and greatly improve the seismic resistance of the structure. The arch ring section 1 of the corrugated structure has great annular rigidity, and the wavy setting increases the bending moment and the height of the compression zone of the lining structure, thereby improving the bearing capacity of the lining structure, and effectively reducing the generation of longitudinal cracks in the lining. In addition, the corrugated arch ring section 1 enhances the appearance of the lining structure, and the horizontal concave section at the top of the arch ring section 1 can be used to install lighting and other equipment, making full use of the space of the lining structure.

[0022] In this embodiment, the arch ring section 1, the side wall section 2 and the inverted arch section 3 are constructed of ultra-high performance concrete. In this structure, based on the material properties of ultra-high performance concrete, the compressive and tensile strengths of the lining structure are greatly improved, the soil shrinkage creep effect of the concrete is reduced, and the crack resistance of the lining structure is further improved.

[0023] In this embodiment, the arch ring section 1, the side wall section 2 and the inverted arch section 3 are constructed of ultra-high performance concrete made of active fly ash. In this structure, the active fly ash high performance concrete has good corrosion resistance, frost resistance, carbonization resistance, and chloride ion penetration resistance, which reduces the damage of the lining structure caused by the surrounding environment and further improves the structural stability of the lining structure.

[0024] In this embodiment, the horizontal section 5 and the vertical section 4 have the same thickness. Specifically, the thickness of the horizontal section 5 and the vertical section 4 is set to h, 50mm≤h≤150mm. The length of the horizontal section 5 is set to L, 500mm≤L≤1500mm; the height of the vertical section 4 is set to H, 500mm≤H≤1500mm. In this structure, ultra-high performance concrete can reduce the thickness of the corrugated arch ring section 1, increase the heat dissipation surface of the concrete, reduce the impact of the hydrothermal reaction on the lining structure, and further improve the crack resistance of the lining structure.

[0025] In this embodiment, the vertical section 4 includes a convex section I and a concave section II that can be mutually engaged and spliced ​​along the length direction of the tunnel. In this structure, the arch ring section 1, the side wall section 2, and the inverted arch section 3 can be prefabricated in sections, and then assembled and consolidated by equipment to form a whole. The connection between the arch ring section 1 and the two prefabricated sections can be adopted as follows Figure 3 The convex section I and the concave section II are connected in a mosaic manner, and the connection is performed in the middle of the vertical section 4, which is convenient for construction.

[0026] In this embodiment, the convex part of the convex section I is provided with embedded thick steel bars or steel sections on both sides of the wall along the width direction of the tunnel; the concave part of the concave section II is provided with embedded thick steel bars or steel sections on both sides of the wall along the width direction of the tunnel. In this structure, after the convex section I and the concave section II are assembled in place, ultra-high performance concrete is injected into the overlapped part between the two to consolidate and form a whole, which has a stable structure and is easy to construct.

[0027] Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the art can use the above disclosed technical content to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A tunnel open hole lining structure, characterized in that: The invention comprises an annular cross section composed of an arch ring section (1), a side wall section (2) and an inverted arch section (3); the arch ring section (1) is a wave-shaped structure, the arch ring section (1) comprises a horizontal section (5) arranged horizontally and a vertical section (4) arranged vertically, and the horizontal section (5) and the vertical section (4) are alternately combined and connected along the length direction of the tunnel.

2. The tunnel open hole lining structure according to claim 1 is characterized in that: The arch ring section (1), the side wall section (2) and the inverted arch section (3) are constructed of ultra-high performance concrete.

3. The tunnel open hole lining structure according to claim 1 is characterized in that: The arch ring section (1), the side wall section (2) and the invert arch section (3) are constructed of active fly ash ultra-high performance concrete.

4. The tunnel open hole lining structure according to claim 2 or 3, characterized in that: The horizontal section (5) and the vertical section (4) have the same thickness.

5. The tunnel open hole lining structure according to claim 4 is characterized in that: The thickness of the horizontal section (5) and the vertical section (4) is set to h, 50mm≤h≤150mm.

6. The tunnel open hole lining structure according to claim 5 is characterized in that: The length of the horizontal section (5) is set to L, 500mm≤L≤1500mm; the height of the vertical section (4) is set to H, 500mm≤H≤1500mm.

7. The open tunnel lining structure according to any one of claims 1 to 3, characterized in that: The vertical section (4) comprises a convex section (I) and a concave section (II) which can be mutually engaged and spliced ​​along the length direction of the tunnel.

8. The tunnel open hole lining structure according to claim 7 is characterized in that: The convex part of the convex section (I) is provided with embedded steel bars or steel sections on both side walls along the tunnel width direction; the concave part of the concave section (II) is provided with embedded steel bars or steel sections on both side walls along the tunnel width direction.

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