Tunnel supporting operation safety device serving as secondary lining steel bar falling protector

Abstract

The utility model provides a tunnel support operation safety device serving as a secondary lining steel bar falling protector, which belongs to the technical field of tunnel construction protection and comprises an anchor rod, a connecting component and a circular ring are arranged at the lower end of the anchor rod, and the lower end of the anchor rod is connected with the circular ring through the connecting component. And a safety belt of a worker is hung on the steel wire rope, so that the defect of insufficient personnel protection caused by the fact that a traditional excavation trolley protective barrier is not repaired in time after being damaged is overcome, the operation safety of personnel is ensured, and the principle that engineering construction is people-oriented is kept; the steel bar protection layer is effectively controlled, meanwhile, vault steel bars are prevented from settling due to dead weight, the device is installed during primary supporting, the circular rings and the steel wire ropes can be detached through the connecting sleeves during lining operation, the repeated utilization rate is high, and the anchor rods left in the rock mass can enhance the overall structural strength of primary supporting.

Description

Technical Field

[0001] The utility model relates to a safety device for tunnel support operation and also serves as an anti-falling device for the secondary lining steel bars, but it does not limit the utility model. Background Art

[0002] With the strong promotion of urban modernization construction and the rapid development of rail transit, subway construction technology is also in a stage of rapid development. Since the open-cut method of construction often causes serious interference to the surrounding ground commerce and traffic, the underground mined-out station will gradually become the main direction of construction. During the construction of the mined-out project, during the support operation, there are disadvantages such as the shaking of the trolley, insufficient height and easy damage of the guardrail, which often cannot better guarantee the safety of the operators working at high altitudes, and there is also a serious problem of high maintenance cost consumption. The traditional trolley protection not only consumes the maintenance cost, but also cannot completely solve the life safety of the operators. After the secondary lining steel bars are tied, due to the self-weight of the arch top steel bars, there is a risk of sinking or even collapse, and the project quality and safety cannot be effectively guaranteed. Content of the Utility Model

[0003] In order to solve the problem that the life safety of the operators cannot be completely guaranteed, and after the secondary lining steel bars are tied, there is a risk of sinking or even collapse due to the self-weight of the arch top steel bars, the utility model provides a safety device for tunnel support operation and also serves as an anti-falling device for the secondary lining steel bars.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A safety device for tunnel support operation and also serves as an anti-falling device for the secondary lining steel bars, including an anchor rod, a connecting component and a ring are arranged at the lower end of the anchor rod, and the lower end of the anchor rod is connected with the ring through the connecting component.

[0006] As a further description of the above technical scheme:

[0007] The connecting component includes a screw rod, a connecting sleeve, a welding plate and a connecting rod. The lower end of the anchor rod is fixedly connected with the screw rod. The circumferential surface of the screw rod is threadedly connected with the connecting sleeve. The lower end of the connecting sleeve is fixedly connected with the welding plate. The lower end of the welding plate is fixedly connected with the connecting rod, and the connecting rod is fixedly connected with the ring.

[0008] As a further description of the above technical scheme:

[0009] A backing plate is threadedly connected to the circumferential surface of the screw rod near one end of the anchor rod.

[0010] As a further description of the above technical scheme:

[0011] Internal threads are arranged inside the connecting sleeve, and the internal threads are matched with the external threads of the screw rod.

[0012] As a further description of the above technical solution:

[0013] The diameter of the welding plate is greater than the outer diameter of the connecting sleeve.

[0014] As a further description of the above technical solution:

[0015] A reinforcing block is fixedly connected to the lower end of the welding plate, and the reinforcing block is fixedly connected to the connecting rod.

[0016] The beneficial effects of the present utility model: By providing the anchor rod, the connecting assembly and the circular ring, the steel wire rope is passed through the circular ring, and the safety belt of the worker is suspended on the steel wire rope, thus avoiding the disadvantage of insufficient personnel protection caused by untimely repair after the damage of the protective railing of the traditional excavation trolley, ensuring the safety of personnel operation, adhering to the principle of people-oriented in engineering construction. During the lining steel bar operation, the steel bar mesh is reliably tied by the anchor rod, effectively controlling the steel bar protective layer, and at the same time preventing the steel bars at the top of the arch from settling due to their own weight. And this device is installed during the initial support. When entering the lining operation, the circular ring and the steel wire rope can be disassembled through the connecting sleeve, with high reuse rate. The anchor rod left in the rock mass can strengthen the overall structure strength of the initial support. Therefore, the utilization of this device realizes the advantages of safety, economy and environmental protection in tunnel operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly show a safety device for tunnel support operation and also serving as an anti-falling device for the second lining steel bars, the following drawings are shown;

[0018] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 Of the present utility model Figure 1 Enlarged view of part A;

[0020] Figure 3 It is a schematic diagram of the structure of the connecting sleeve of the present utility model.

[0021] Wherein the reference numerals in the drawings;

[0022] 1. Anchor rod; 2. Lead screw; 3. Base plate; 4. Connecting sleeve; 5. Welding plate; 6. Connecting rod; 7. Circular ring; 8. Reinforcing block. DETAILED DESCRIPTION OF THE INVENTION

[0023] Please refer to the attached Figures 1-3, a safety device for tunnel support operations that also serves as an anti-falling device for the secondary lining steel bars, includes a bolt 1. A connection component and a circular ring 7 are provided at the lower end of the bolt 1, and the lower end of the bolt 1 is connected to the circular ring 7 through the connection component. The connection component includes a screw rod 2, a connection sleeve 4, a welding plate 5, and a connecting rod 6. The lower end of the bolt 1 is fixedly connected to the screw rod 2. The circumferential surface of the screw rod 2 is threadedly connected to the connection sleeve 4. The lower end of the connection sleeve 4 is fixedly connected to the welding plate 5. The lower end of the welding plate 5 is fixedly connected to the connecting rod 6, and the connecting rod 6 is fixedly connected to the circular ring 7.

[0024] Specifically, during the support operation, the steel wire rope is passed through the circular ring 7, and the worker's safety belt is suspended on the steel wire rope. This avoids the disadvantage of insufficient personnel protection caused by the untimely repair of the damaged protective railing of the traditional excavation trolley, ensuring the safety of personnel operations and adhering to the principle of putting people first in engineering construction. During the lining steel bar operation, the bolt 1 is used to reliably tie the steel bar mesh, effectively controlling the steel bar protection layer and preventing the steel bars at the arch top from settling due to their own weight. And this device is installed during the primary support. When entering the lining operation, the circular ring 7 and the steel wire rope can be disassembled through the connection sleeve 4, with a high reuse rate. The bolt 1 left in the rock mass can strengthen the overall structure strength of the primary support. Therefore, the utilization of this device realizes the advantages of safety, economy, and environmental protection in tunnel operations.

[0025] A backing plate 3 is threadedly connected to the circumferential surface of the screw rod 2 near one end of the bolt 1. During operation, by setting the backing plate 3, the contact area between the bolt 1 and the tunnel surface can be increased under the action of the backing plate 3.

[0026] Internal threads are provided inside the connection sleeve 4, and the internal threads cooperate with the external threads of the screw rod 2. During operation, since the internal threads are provided inside the connection sleeve 4, it is convenient for the connection sleeve 4 to be connected to the screw rod 2.

[0027] The diameter of the welding plate 5 is larger than the outer diameter of the connection sleeve 4. During operation, since the diameter of the welding plate 5 is larger than the outer diameter of the connection sleeve 4, it is convenient for the welding plate 5 to be connected to the connection sleeve 4.

[0028] A reinforcing block 8 is fixedly connected to the lower end of the welding plate 5, and the reinforcing block 8 is fixedly connected to the connecting rod 6. During operation, by setting the reinforcing block 8, the stability of the connection between the connecting rod 6 and the welding plate 5 can be improved under the action of the reinforcing block 8.

[0029] Working principle

[0030] Installation process during primary support:

[0031] After the tunnel excavation, first conduct the initial spraying on the face of the tunnel. The trolley is advanced to the tunnel working face for the initial support operation. Install the bolt 1 into the tunnel. When installing the bolt 1, according to the characteristics of the tunnel section, pre-select the setting points in advance according to the tunnel section, drill the anchor holes with the same depth as the initial support, grout simultaneously with the tunnel bolt 1, install the processed screw rod 2 and the backing plate 3, then install the connecting sleeve 4, wrap it tightly with plastic film and then carry out spraying. After the spraying is completed, install the steel wire rope inside the ring 7. During the next cycle of operation, the operator can hang the safety belt on the steel wire rope installed this time for edge safety operation. This avoids the disadvantage of insufficient personnel protection caused by the untimely repair after the damage of the traditional excavation trolley guardrail, ensures the safety of personnel operation, and adheres to the principle of people-oriented in engineering construction.

[0032] Installation process during the secondary lining:

[0033] For the tunnel lining, the steel bar installation and the cast-in-place concrete pouring are carried out through the steel bar trolley and the steel form trolley. When the steel bars are tied to the crown of the arch, disassemble and recycle the steel wire rope and the connecting sleeve 4. After recycling, it is convenient for continuous cyclic use. The exposed screw rod 2 is reliably welded to the lining steel bars through the L-shaped steel bars to control the steel bar layer spacing, the protective layer and prevent the steel bars from sinking due to gravity.

[0034] Those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the disclosure hereof. This application is intended to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present invention and include the well-known common general knowledge or conventional technical means in the technical field not disclosed by the present invention. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present invention are pointed out by the following claims.

[0035] It should be understood that relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. The present invention is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A safety device for tunnel support operations that also serves as a fall arrester for the secondary lining steel bars, including a bolt (1), characterized in that: A connecting component and a ring (7) are provided at the lower end of the anchor rod (1), and the lower end of the anchor rod (1) is connected to the ring (7) through the connecting component.

2. The safety device for tunnel support operation, which also serves as a fall arrester for the secondary lining steel bars according to claim 1, is characterized in that: The connecting component includes a lead screw (2), a connecting sleeve (4), a welding plate (5) and a connecting rod (6). A lead screw (2) is fixedly connected to the lower end of the anchor rod (1). A connecting sleeve (4) is threadedly connected to the circumferential surface of the lead screw (2). A welding plate (5) is fixedly connected to the lower end of the connecting sleeve (4). A connecting rod (6) is fixedly connected to the lower end of the welding plate (5), and the connecting rod (6) is fixedly connected to the ring (7).

3. A safety device for tunnel support operations that also serves as a fall arrester for the secondary lining steel bars, as described in claim 2, wherein: A backing plate (3) is threadedly connected to the circumferential surface of the lead screw (2) near one end of the anchor rod (1).

4. A safety device for tunnel support operations, which also serves as a fall arrester for the secondary lining steel bars, as described in claim 3, characterized in that: Internal threads are provided inside the connecting sleeve (4), and the internal threads are matched with the external threads of the lead screw (2).

5. The safety device for tunnel support operation, which also serves as a fall arrester for the secondary lining steel bars, according to claim 2, is characterized in that: The diameter of the welding plate (5) is larger than the outer diameter of the connecting sleeve (4).

6. The safety device for tunnel support operation, which also serves as a fall arrester for the secondary lining steel bars according to claim 5, is characterized in that: A reinforcing block (8) is fixedly connected to the lower end of the welding plate (5), and the reinforcing block (8) is fixedly connected to the connecting rod (6).

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