Operation tunnel cavity renovation structure

Abstract

The utility model discloses an operation tunnel cavity renovation structure which comprises a tunnel renovation ring arranged below a tunnel cavity and a foam concrete entity filled in the tunnel cavity, and the tunnel renovation ring comprises a reinforcing anchor rod and a corrugated steel plate annularly lined below a tunnel lining. The reinforcing anchor rods are arranged in a tunnel lining and a tunnel primary support, the tail ends of the reinforcing anchor rods are fixed in surrounding rock, the corrugated steel plate is erected between the two steel plate bases, the steel plate bases are embedded in the concrete foundation, the concrete foundation is poured at an arch foot of the tunnel lining, and the concrete foundation is connected with the tunnel lining through the corresponding reinforcing anchor rods; a pouring space is formed between the corrugated steel plate and the tunnel lining; and a waterproof mortar layer is filled in the pouring space. Partial or whole-ring chiseling and rebuilding of the tunnel are not needed, time and labor are saved, efficiency is high, and influence on tunnel operation is small. The structure is stable, waterproof effect is good, and repairing quality is high.

Description

TECHNICAL FIELD

[0001] The utility model belongs to tunnel disease regulation technical field, especially relate to a kind of operation tunnel cavity regulation structure. BACKGROUND

[0002] The cavity behind tunnel lining has concealment, potential harm is very big, cavity can unload the load of its surrounding rock, make the surrounding rock pressure of adjacent range redistribution, can lead to nearby ground pressure increase, make tunnel structure bear eccentric load and produce stress concentration phenomenon, can cause structure bearing capacity to be insufficient, make cavity become the focus of lining structure damage, even lead to collapse.Therefore, the research and application of cavity defect regulation scheme have important significance to guarantee tunnel safe operation.

[0003] In actual construction process, when cavity appears behind lining, currently mainly through grouting to complete the repair of cavity, although slurry can play the role of repair after consolidation, but repair quality is lower.Especially when cavity is larger, single grouting method cannot meet the repair quality requirement.Currently, larger cavity is mostly treated by partial or whole ring chiseling and rebuilding, this method is time-consuming and labor-consuming, greatly influence normal operation of tunnel.And general tunnel waterproof board is located between primary support and lining, to treat cavity behind primary support, existing conventional means such as “open skylight”, grouting filling etc. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of operation tunnel cavity regulation structure to solve the technical problem existing in prior art, which can better regulate larger cavity, with good repair quality and high efficiency.

[0005] The utility model provides a kind of operation tunnel cavity regulation structure to solve the technical problem existing in prior art, which can better regulate larger cavity, with good repair quality and high efficiency.

[0006] The corrugated steel plate is fixed with tunnel lining by chemical anchor bolt, gasket is arranged on the chemical anchor bolt, and structural adhesive is used to seal the connecting portion.

[0007] The reinforced anchor rod is densified at arch foot and cavity.

[0008] The corrugated steel plate is provided with a galvanized layer, is spliced by multiple blocks, two adjacent blocks are overlapped and connected by high-strength bolts, a gasket is arranged on the high-strength bolt, and the connecting position is sealed by structural glue.

[0009] The corrugated steel plate is connected with the steel plate base by bolts.

[0010] The utility model has the advantages and positive effects that: by adopting cavity grouting and adding the regulation ring structure, the tunnel does not need to be partially or entirely ringed to be removed and rebuilt, time and labor are saved, efficiency is high, the influence on tunnel operation is small; moreover, the foam concrete is used to fill the cavity, the regulation ring structure adopts the reinforced anchor rod and the corrugated steel plate reinforcing structure and is provided with a waterproof layer, the structure is stable, the waterproof effect is good, and the repair quality is high. Further, the chemical anchor bolt is used to fix the corrugated steel plate, the connection of the lining, the corrugated steel plate and the waterproof layer is stable; the reinforced anchor rod with the tail end penetrating into the surrounding rock is punched into the tunnel lining, and the reinforced concrete foundation and the tunnel lining are connected together, so that the lining weak part can be reinforced, and the stability of the connection between the regulation structures is enhanced. The utility model is particularly suitable for large cavities in tunnels. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 It is a structural sectional view of a cavity section; Figure 1

[0013] It is a structural sectional view of a cavity section; Figure 3 Figure 1 It is a structural sectional view of a cavity section.

[0014] In the drawing: 1. Concrete foundation; 2. Reinforced anchor rod; 3. Chemical anchor bolt; 4. Tunnel lining; 5. Tunnel primary support; 6. Waterproof mortar layer; 7. Corrugated steel plate; 8. Foam concrete entity; 9. Tunnel cavity. DETAILED DESCRIPTION

[0015] In order to further understand the invention content, characteristics and effects of the utility model, the following examples are exemplified, and are described in detail as follows in cooperation with the drawings:

[0016] Please refer to Figures 1-3 ​The utility model provides an operating tunnel cavity remediation structure, which comprises a tunnel remediation ring arranged below a tunnel cavity 9 and a foamed concrete body 9 filled in the tunnel cavity, the tunnel remediation ring comprises reinforced anchor rods 2 and corrugated steel plates 7 lined below a tunnel lining to form a ring, the reinforced anchor rods 2 are arranged in the tunnel lining 4 and a tunnel primary support 5 and fixed at the ends in surrounding rock, the corrugated steel plates 7 are arranged between two steel plate bases, the steel plate bases are embedded in a concrete foundation 1, the concrete foundation 1 is poured at a tunnel lining springing, and the concrete foundation 1 is connected with the tunnel lining 4 through corresponding reinforced anchor rods 2; a grouting space is formed between the corrugated steel plates 7 and the tunnel lining 4; and a waterproof mortar layer 6 is filled in the grouting space.

[0017] The more preferred scheme of the embodiment is as follows:

[0018] The corrugated steel plates 7 are fixed with the tunnel lining 4 through chemical anchors 3, the chemical anchors 3 are provided with gaskets, the connection positions are sealed through structural glue, and the waterproof performance can be effectively improved. The above structure can improve the strength and stability of the corrugated steel plates; the gaskets can prevent grouting overflow and improve the waterproof performance of the corrugated steel plates to a certain extent.

[0019] The reinforced anchor rods 2 are densified at the springing and the cavity, the tensile stress at the springing is large, and lining cracks, water leakage and the like are prone to occur; the weak parts can be reinforced through the densified reinforced anchor rods, and the associated diseases can be remediated; the anchor rod ends penetrate into the surrounding rock, the contact between the compacted filling body and the surrounding rock is compacted, and the stress state of the lining can be further optimized. The cavity can be further reinforced through the densified reinforced anchor rods.

[0020] The corrugated steel plates 7 are provided with a galvanized layer and are spliced by a plurality of blocks, two adjacent blocks are overlapped and connected through high-strength bolts, the high-strength bolts are provided with gaskets, the connection positions are sealed through structural glue, and the waterproof performance can be effectively improved. The above structure can improve the strength and stability of the corrugated steel plates; the prefabricated gaskets can prevent grouting overflow and improve the waterproof performance of the corrugated steel plates to a certain extent.

[0021] The corrugated steel plates 7 and the steel plate bases are connected through bolts, the structure is simple, and the construction is convenient.

[0022] The construction method of the utility model is as follows:

[0023] S1. The reinforced anchor rods 2 are punched in, used for stabilizing the tunnel lining 4 and the tunnel primary support 5, and enhancing the connection stability between the subsequent filling body, waterproof layer, concrete foundation and surrounding rock and tunnel lining.

[0024] S2. The foamed concrete 8 is used for filling the cavity, can fill the load vacancy, optimize the stress state of the lining and prevent the cavity from developing.

[0025] Generally, when filling the vault cavity with concrete, due to insufficient pouring pressure, concrete shrinkage and other reasons, the concrete may not be in close contact with the surrounding rock and form a whole, not only failing to fill the missing load and optimize the stress state of the lining, but also directly acting on the weak part of the lining, causing adverse effects; while the foam concrete has the characteristics of light weight, high strength, easy to pour and strong adhesion, which can fill the cavity more fully, while the self-weight has less impact, which can better optimize the stress state of the lining.

[0026] S3. A concrete foundation 1 is arranged at the arch foot of the tunnel lining, and a steel plate base is embedded in the concrete foundation 1, and the steel plate base is connected with the reinforced anchor rod 2 driven in by step S1, thereby enhancing the connection between the concrete foundation and the tunnel lining and improving the stability of the foundation, so as to ensure that the corrugated steel plate and the waterproof layer are in a stable state.

[0027] The corrugated steel plate 7 arranged in a ring is arranged between the two steel plate bases, the corrugated steel plate is connected with the steel plate base by bolts, the corrugated steel plate 7 is arranged below the tunnel lining 4 within the regulation ring, and a pouring space is formed between the corrugated steel plate and the tunnel lining.

[0028] S4. The pouring space is filled with waterproof mortar to form a waterproof layer 6, which can improve the overall waterproof performance of the tunnel.

[0029] Although the preferred embodiments of the utility model are described above in combination with the drawings, the utility model is not limited to the above-mentioned specific embodiments, and the above-mentioned specific embodiments are only illustrative and not restrictive, and those skilled in the art can make many forms under the inspiration of the utility model without departing from the purpose of the utility model and the scope protected by the claims, and these all belong to the protection scope of the utility model.

Claims

1. An operation tunnel hole remediation structure, characterized by, The structure comprises a tunnel improvement ring arranged below a tunnel cavity and a foamed concrete entity filled in the tunnel cavity, the tunnel improvement ring comprises reinforced anchor rods and corrugated steel plates lined below a tunnel lining, the reinforced anchor rods are arranged in the tunnel lining and a tunnel primary support, and the terminal end is fixed in surrounding rock, the corrugated steel plates are arranged between two steel plate bases, the steel plate bases are embedded in a concrete foundation, the concrete foundation is poured at an arch spring of the tunnel lining, and the concrete foundation is connected with the tunnel lining through corresponding reinforced anchor rods; a pouring space is formed between the corrugated steel plates and the tunnel lining; A waterproof mortar layer is filled in the pouring space.

2. The operation tunnel hole remediation structure according to claim 1, wherein, The corrugated steel plates are fixed with the tunnel lining through chemical anchors, the chemical anchors are provided with gaskets, and the connection is sealed through structural glue.

3. The operation tunnel hole remediation structure according to claim 1, wherein, The reinforced anchor rods are densified at the arch spring and the cavity.

4. The operational tunnel void remediation structure of claim 1, wherein, The corrugated steel plates are provided with a galvanized layer, are spliced by multiple blocks, two adjacent blocks are overlapped and are connected through high-strength bolts, the high-strength bolts are provided with gaskets, and the connection is sealed through structural glue.

5. The operational tunnel void remediation structure of claim 1, wherein, The corrugated steel plates are connected with the steel plate bases through bolts.

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