Reinforcing structure for inverted-arch-free secondary lining

Abstract

The utility model relates to the technical field of tunnel reinforcement, in particular to a reinforcing structure for an inverted-arch-free secondary lining, which comprises a plurality of arch frame structures, a plurality of inclined strut structures, a cushion layer and a plurality of connecting rods, each arch frame structure comprises an arc-shaped steel frame and a bottom rod, the arc-shaped steel frames are connected with the bottom rods, and the arc-shaped steel frames and the bottom rods are encircled to form the section shape of a tunnel. The inclined strut structures are arranged between the arc-shaped steel frames and the bottom rods, the connecting rods are arranged between the adjacent arch frame structures, and the cushion layers are arranged between the secondary linings and the arch frame structures. The elastic cushion layer is arranged between the secondary lining and the arch frame structure, the cushion layer can protect the secondary lining and the arch frame structure and prevent large acting force between the secondary lining and the arch frame structure, the positions of the supporting seat I and the supporting seat II are adjustable and can be adjusted according to the protruding position of the inverted arch, so that the arch frame structure can be better attached to the inverted arch, and the supporting seat I and the supporting seat II are not prone to deformation. And meanwhile, the inclined strut structure is arranged in the arch frame structure, so that the stability of the arch frame structure can be enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel reinforcing technique field, especially in a kind of reinforcing structure for secondary lining of no inverted arch. BACKGROUND

[0002] The engineering geology condition where tunnel is located is extremely complex, and most tunnel projects have different degrees of diseases, among which the problem of secondary lining cracking of tunnel is particularly prominent, and secondary lining cracking will seriously threaten the safety and durability of tunnel project, and secondary lining of tunnel is the part of second reinforcing in tunnel engineering, which not only guarantees the stability, safety and beauty of tunnel engineering, but also is the common safety reserve measure, secondary lining is usually a ring of concrete lining made inside the initial lining of tunnel, which plays an important supporting role in the stability of surrounding rock of tunnel, and also plays a waterproof function, and the causes of secondary lining crack of tunnel are complex, including temperature stress, surrounding rock convergence deformation, engineering geology condition, underground water system change, uneven settlement of inverted arch, lining through joint setting not corresponding, construction technology and the like.The causes and characteristics of these cracks are not exactly the same, but they will all have serious impact on the safety and quality of tunnel engineering.For the damaged secondary lining, it needs to be temporarily reinforced as soon as possible to prevent further deterioration of the lining, and the common method is to carry out temporary steel frame support, grouting reinforcement surrounding rock and the like, and steel frame support usually includes I-steel arch, inclined brace and cross brace and the like, which can effectively share the pressure around, prevent further cracking, but the temporary support structure cannot guarantee the fit with the original secondary lining structure, and cannot inhibit the uplift of inverted arch. SUMMARY

[0003] In view of the technical problems in the background art, the purpose of the utility model is to provide a reinforcing structure for secondary lining of no inverted arch, which can closely fit with secondary lining while inhibiting the uplift of inverted arch to prevent further cracking of tunnel.

[0004] To achieve the above-mentioned purpose, the technical scheme provided by the utility model is as follows:

[0005] A reinforcing structure for secondary lining of no inverted arch, comprising a plurality of arch structures, a plurality of inclined brace structures, a cushion layer and a plurality of connecting rods, the arch structure comprises an arc-shaped steel frame and a bottom rod, the arc-shaped steel frame and the bottom rod are connected, and the arc-shaped steel frame and the bottom rod are arranged to form the cross-sectional shape of the tunnel, the inclined brace structure is arranged between the arc-shaped steel frame and the bottom rod, the connecting rod is arranged between adjacent arch structures, and the cushion layer is arranged between the secondary lining and the arch structure.

[0006] As a preferred, the inclined brace structure comprises a support seat I, a support seat II and a support rod, the support seat I and the support seat II are respectively connected at both ends of the support rod, the support seat I is connected with the arc-shaped steel frame, and the support seat II is connected with the bottom rod.

[0007] As preferred, the support base I comprises a support base I and a sliding rod I, the sliding rod I is arranged at one end of the support base I, a sliding groove I is arranged in the arc-shaped steel frame, and the sliding rod I is slidably arranged in the sliding groove I.

[0008] As preferred, the support base II comprises a support base II and a sliding rod II, the sliding rod II is arranged at one end of the support base II, a sliding groove II is arranged in the bottom rod, and the sliding rod II is slidably arranged in the sliding groove II.

[0009] As preferred, the support base I further comprises a locking piece I, a limiting groove I is arranged in the arc-shaped steel frame, the locking piece I and the sliding rod I are detachably connected, and the locking piece I is arranged in the limiting groove I.

[0010] As preferred, the support base II further comprises a locking piece II, a limiting groove II is arranged in the arc-shaped steel frame, the locking piece II and the sliding rod II are detachably connected, and the locking piece II is arranged in the limiting groove II.

[0011] As preferred, the two ends of the support rod are arc-shaped, the support rod is detachably connected with the support base I, and the support rod is detachably connected with the support base II.

[0012] The utility model has the advantages and beneficial effects that:

[0013] In the utility model, the elastic cushion layer is arranged between the secondary lining and the arch structure, so that the reinforcing structure can better support the secondary lining, the cushion layer can also protect the secondary lining and the arch structure, prevent a large force between the two, the positions of the support base I and the support base II are adjustable, the positions can be adjusted according to the position of the inverted arch, so that the arch structure can better adhere to the inverted arch, prevent the inverted arch from protruding, and the diagonal bracing structure is arranged in the arch structure, so that the stability of the arch structure is also enhanced. ACCURACY OF DRAWINGS

[0014] Fig. 1 The utility model provides a connection schematic diagram of the reinforcing structure for the secondary lining without inverted arch.

[0015] Fig. 2 The utility model provides a three-dimensional view of the reinforcing structure for the secondary lining without inverted arch.

[0016] Fig. 3 The utility model provides a connection schematic diagram of the arch structure and the diagonal bracing structure of the reinforcing structure for the secondary lining without inverted arch.

[0017] Fig. 4 The utility model provides an explosion view of the diagonal bracing structure of the reinforcing structure for the secondary lining without inverted arch.

[0018] Attached reference numerals: A-Secondary lining, B-Inverted arch, C-Arch frame structure, D-Diagonal bracing structure, 2-Arch-shaped steel frame, 21-Slide groove I, 22-Limiting groove I, 3-Bottom rod, 31-Slide groove II, 32-Limiting groove II, 4-Support seat I, 41-Support I, 42-Slide rod I, 43-Locking piece I, 5-Support seat II, 51-Support II, 52-Slide rod II, 53-Locking piece II, 6-Support rod, 7-Connecting rod, 8-Bedding layer. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] Example

[0022] like Figs. 1-4 As shown, a reinforcement structure for secondary lining without an invert arch includes several arch frame structures C, several diagonal bracing structures D, a cushion layer 8, and several connecting rods 7. The arch frame structure C includes an arc-shaped steel frame 2 and a bottom rod 3, which are connected. Both the arc-shaped steel frame 2 and the bottom rod 3 are steel structural components and can be fixedly connected by welding or other methods. The arc-shaped steel frame 2 and the bottom rod 3 form the cross-sectional shape of the tunnel. The arc-shaped steel frame 2 and the bottom rod 3 are connected within the tunnel according to the shape of the secondary lining A. The connecting rods 7 are placed between adjacent arch frame structures C. The arch frame structures C are assembled and connected by overlapping. Due to gaps between the parts... Since the arch frame structure C is difficult to fit tightly with the secondary lining A after overlapping, a pad 8 is set on the outside of the arch frame structure C. The pad 8 is placed between the secondary lining A and the arch frame structure C. After the arch frame structure C overlaps, it abuts against the pad 8, so that the pad 8 fits tightly with the secondary lining A and can better support the secondary lining A. The pad 8 is made of elastic material, which can provide maximum support for the secondary lining A and absorb some of the interaction force between the secondary lining A and the arch frame structure C, thus protecting the secondary lining A and the arch frame structure C to the greatest extent and preventing the secondary lining A or the arch frame structure C from being damaged due to large forces during the support process.

[0023] like Figs. 1-4As shown, the diagonal bracing structure D is set between the arc-shaped steel frame 2 and the bottom rod 3. The diagonal bracing structure D includes support seat I4, support seat II5 and support rod 6. Support seat I4 and support seat II5 are respectively connected to the two ends of support rod 6. Support seat I4 is connected to the arc-shaped steel frame 2, and support seat II5 is connected to the bottom rod 3. Support seat I4 abuts against the secondary lining in the A direction, and support seat II5 abuts against the invert arch in the B direction. The diagonal bracing structure D not only makes the connection between the arc-shaped steel frame 2 and the bottom rod 3 more stable, but also, with support seat II5 facing the invert arch B, it can maximize the contact between the bottom rod 3 and the invert arch B, preventing the invert arch B from bulging.

[0024] like Figs. 1-4 As shown, the support base I4 includes a support I41, a locking element I43, and a sliding rod I42. The sliding rod I42 is located at one end of the support I41. A sliding groove I21 is provided through the arc-shaped steel frame 2. Both ends of the sliding rod I42 are protruding and slidably located within the sliding groove I21. A limiting groove I22 is provided through the arc-shaped steel frame 2. The locking element I43 and the sliding rod I42 are detachably connected, and the locking element I43 is located within the limiting groove I22. The locking element I43 and the sliding rod I42 are connected by a shaft hole and by a threaded connection. When one end of the locking element I43 is fully inserted into the sliding rod I42 through the limiting groove I22, the locking element I43 can fit tightly against the arc-shaped steel frame 2, restricting the sliding of the sliding rod I42 and fixing the support base I4.

[0025] like Figs. 1-4As shown, the support base II 5 includes a support II 51, a locking piece II 53 and a sliding rod II 52, the sliding rod II 52 is arranged at one end of the support II 51, a sliding groove II 31 is arranged in the bottom rod 3, the two ends of the sliding rod II 52 are protruding, and the two ends are slidably arranged in the sliding groove II 31, a limiting groove II 32 is arranged in the arc-shaped steel frame 2, the locking piece II 53 and the sliding rod II 52 are detachably connected, and the locking piece II 53 is arranged in the limiting groove II 32, the locking piece II 53 and the sliding rod II 52 are connected in the shaft hole mode, and the locking piece II 53 and the sliding rod II 52 are connected through threads, when one end of the locking piece II 53 is completely inserted into the sliding rod II 52 through the limiting groove II 32, the locking piece II 53 can be closely attached to the bottom rod 3, the sliding of the sliding rod II 52 is limited, the support base II 5 is fixed, the two ends of the support rod 6 are arc-shaped, the support rod 6 and the support I 41 are detachably connected, the support rod 6 and the support II 51 are detachably connected, after analyzing the structure of the inverted arch B, the support base II 5 is moved to the position where the inverted arch B is easy to protrude and is fixed, one end of the support rod 6 is placed on the support II 51, the position of the support base I 4 is adjusted, the other end of the support rod 6 abuts against the support I 41 and the support base II 5 is fixed, one end of the inclined strut structure D is arranged towards the secondary lining A so that the cushion layer 8 abuts against the secondary lining A, and the other end is arranged towards the inverted arch B so that the bottom rod 3 abuts against the inverted arch B, not only the stability of the overall structure is increased, but also the position of the inclined strut structure D can be adjusted according to the protrusion of the inverted arch B, and the protrusion of the inverted arch B is greatly prevented.

[0026] The preferred embodiments of the utility model have been described, and are not used to limit the utility model, for the person skilled in the art, the utility model can have various changes and changes, and any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A reinforcing structure for a secondary lining without invert, comprising a number of arch structures, a number of diagonal strut structures, a cushion layer and a number of connecting rods, characterized in that, The arch structure comprises an arc-shaped steel frame and a bottom rod, the arc-shaped steel frame and the bottom rod are connected, the arc-shaped steel frame and the bottom rod are arranged in a cross-sectional shape of a tunnel, the diagonal brace structure is arranged between the arc-shaped steel frame and the bottom rod, the connecting rod is arranged between adjacent arch structures, and the cushion layer is arranged between the secondary lining and the arch structure.

2. A reinforcing structure for a secondary lining without inverted arches according to claim 1, characterized in that, The diagonal brace structure comprises a support seat I, a support seat II and a support rod, the support seat I and the support seat II are connected at two ends of the support rod respectively, the support seat I is connected with the arc-shaped steel frame, and the support seat II is connected with the bottom rod.

3. A reinforcing structure for a secondary lining without inverted arches according to claim 2, characterized in that, The support seat I comprises a support seat I and a sliding rod I, the sliding rod I is arranged at one end of the support seat I, a sliding groove I is arranged through the arc-shaped steel frame, and the sliding rod I is slidably arranged in the sliding groove I.

4. A reinforcing structure for a secondary lining without inverted arches according to claim 2, characterized in that, The support seat II comprises a support seat II and a sliding rod II, the sliding rod II is arranged at one end of the support seat II, a sliding groove II is arranged through the bottom rod, and the sliding rod II is slidably arranged in the sliding groove II.

5. A reinforcing structure for a secondary lining without inverted arches according to claim 3, characterized in that, The support seat I further comprises a locking piece I, a limiting groove I is arranged through the arc-shaped steel frame, the locking piece I and the sliding rod I are detachably connected, and the locking piece I is arranged in the limiting groove I.

6. A reinforcing structure for a secondary lining without inverted arches according to claim 4, characterized in that, The support seat II further comprises a locking piece II, a limiting groove II is arranged through the arc-shaped steel frame, the locking piece II and the sliding rod II are detachably connected, and the locking piece II is arranged in the limiting groove II.

7. A reinforcing structure for a secondary lining without inverted arches according to claim 4, characterized in that, Arc-shaped ends of the support rod are arranged, the support rod is detachably connected with the support seat I, and the support rod is detachably connected with the support seat II.

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