CN204552772U - The steel plate combined tunnel support structure of a kind of steel pipe - Google Patents

Abstract

The utility model discloses the steel plate combined tunnel support structure of a kind of steel pipe, comprise multiple tunnel support unit, tunnel support unit comprises supporting steel pipe and two the first hat steel plates, first hat steel plate connects the second hat steel plate away from the side of supporting steel pipe, supporting steel pipe is arranged two and all offer the joint steel pipe connecting fore shaft, first hat steel plate is arranged the first fixing steel pipe and the second fixing steel pipe, first fixing steel pipe is offered the first fixing fore shaft, second fixing steel pipe is offered the second fixing fore shaft, second hat steel plate is arranged the 3rd fixing steel pipe and the 4th fixing steel pipe, 3rd fixing steel pipe is offered the 3rd fixing fore shaft, 4th fixing steel pipe is offered the 4th fixing fore shaft, first fixing fore shaft be connected fore shaft and be connected, second fixing fore shaft is connected with the 3rd fixing fore shaft, adjacent two tunnel support unit are connected by the 4th fixing fore shaft snapping.This tunnel support structure can realize continuous print integer support to country rock, and supporting effect is good.

Description

A composite tunnel support structure of steel tube and steel plate

technical field

The utility model belongs to the technical field of tunnel support, in particular to a steel tube and steel plate combined tunnel support structure.

Background technique

When the tunnel passes through the weak and broken ground, the ground stress is relatively large, the surrounding rock shows strong rheology, the working face is unstable, and it may collapse at any time, and sometimes it even collapses without digging. At this time, if the conventional support method is still adopted, it will not be able to effectively control and prevent the deformation and collapse of the surrounding rock, and the range of relaxation and strain of the surrounding rock will be further expanded, causing a wider range of surrounding rock relaxation and changing the formation state. And the groundwater environment, in severe cases, it will affect the surface, change the shape of the ground, and endanger the stability and safety of the ground buildings. In this case, the surrounding rock should be reinforced before tunnel construction to improve the stability of the surrounding rock, and then excavated.

In weak surrounding rock, there are many ways to improve the stability of surrounding rock. According to the construction experience at home and abroad, the basic method to improve the stability of the surrounding rock is to control the relaxation and loss of the surrounding rock. The principle is: stabilize the face, close and reinforce the formation in time. These measures are comprehensive and complementary to each other, and should be determined according to specific conditions such as the nature of surrounding rock and construction methods. The country has accumulated rich experience in this regard, but there are still many problems. On the one hand, conventional advanced support methods such as pipe sheds, small conduits and other support structures have low shear stiffness, and the support effect is poor under the conditions of IV and V grades compared with broken surrounding rocks. It is difficult to achieve the effect of improving the stability of the rock mass in front of the tunnel face; on the other hand, the traditional support method still needs to be improved and perfected in terms of engineering and mechanization of construction technology.

The steel plate construction method is a relatively new advance support method in recent years. The width of the steel plate is generally 15cm, the length is 1.2-1.6m, and the interval is about 30cm. It is generally set within 120° of the vault. As a type of support structure, it has the advantages of light weight, long service life, low space requirements, and significant environmental protection effects. Especially in sandstone and mudstone, it can achieve the ideal advanced support effect and ensure the safety of tunnel construction. However, the current steel inserting plate method is mostly inserted into the rock mass in front of the tunnel face at intervals, without forming a continuous advance support structure, and the integrity is slightly poor.

Utility model content

The purpose of the utility model is to overcome the deficiencies in the above-mentioned prior art, and provide a steel tube steel plate combined tunnel support structure. The tunnel support structure can realize continuous overall support for the surrounding rock, has a good support effect, and ensures the safety of tunnel construction.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a steel tube and steel plate combined tunnel support structure, which is characterized in that it includes a plurality of tunnels connected in sequence and inserted into the outer surrounding rock of the tunnel face along the extension direction of the tunnel A support unit, the tunnel support unit includes a support steel pipe and two first hat-shaped steel plates connected to the support steel tube, the support steel tube is arranged between the two first hat-shaped steel plates, The side of the first hat-shaped steel plate away from the supporting steel pipe is connected with a second hat-shaped steel plate, and the supporting steel pipe is provided with two connecting steel pipes with connection locks. A first fixed steel pipe and a second fixed steel pipe are provided, the first fixed steel pipe is provided with a first fixed lock opening extending along its length direction, and the second fixed steel pipe is provided with a second fixed lock opening extending along its length direction. fixed lock, the second hat-shaped steel plate is provided with a third fixed steel pipe and a fourth fixed steel pipe, the third fixed steel pipe is provided with a third fixed lock extending along its length direction, the fourth fixed The steel pipe is provided with a fourth fixed lock extending along its length direction, the first fixed lock is connected with the connecting lock, the second fixed lock is connected with the third fixed lock, adjacent The two tunnel support units are buckled and connected through the fourth fixed lock.

The above-mentioned steel pipe steel plate combined tunnel support structure is characterized in that: an inverted T-shaped plate fixedly connected to it is arranged under the supporting steel pipe, and two connecting steel pipes are arranged on the inverted T-shaped plate one by one. both ends of the board.

The above-mentioned steel pipe and steel plate combined tunnel support structure is characterized in that: one side of the supporting steel pipe is provided with a first connecting plate, and the other side of the supporting steel pipe is provided with a second connecting plate, and the supporting steel pipe is provided with a second connecting plate. One end of the first connecting plate is fixedly connected to the supporting steel pipe, one connecting steel pipe is arranged on the other end of the first connecting plate, one end of the second connecting plate is fixedly connected to the supporting steel pipe, and the other connecting steel pipe is arranged on the second connecting steel pipe. the other end of the board.

The above-mentioned steel tube and steel plate combined tunnel support structure is characterized in that: the first fixed lock is welded to the connecting lock, and the second fixed lock is welded to the third fixed lock.

Compared with the prior art, the utility model has the following advantages:

1. The structure of the utility model is simple, and the design is novel and reasonable.

2. The utility model can form a continuous support structure for the overall support of the surrounding rock by setting the combined structure of steel pipe and steel plate, and its support effect is good, which ensures the safety of tunnel construction.

3. The utility model adopts the combined form of steel pipes and steel plates, mainly through the connection of steel pipes to ensure the overall rigidity of the entire tunnel support structure, and to avoid deviations in the process of inserting the tunnel support units into the surrounding rock, thereby causing damage to the tunnel excavation zone. come to trouble.

4. The utility model can effectively realize the connection of two adjacent hat-shaped steel plates by adopting the structural form of the supporting steel pipe, the first connecting plate and the second connecting plate or the structural form of supporting the steel pipe and the inverted T-shaped plate. The requirement of improving the overall rigidity of the tunnel support structure is achieved, and the structure is simple and the processing is convenient.

5. The utility model has the advantages of low cost, good application effect and convenient popularization and use.

To sum up, the utility model has the advantages of simple structure, novel and reasonable design, high working reliability, long service life, good use effect and easy popularization and use.

The technical solutions of the present utility model will be further described in detail through the drawings and embodiments below.

Description of drawings

Fig. 1 is a schematic diagram of the use state of Embodiment 1 of the present utility model.

Fig. 2 is a schematic structural view of the tunnel support unit in Embodiment 1 of the present utility model.

Fig. 3 is a schematic diagram of the connection relationship between the supporting steel pipe and the inverted T-shaped plate in Embodiment 1 of the utility model.

Fig. 4 is a structural schematic diagram of the first hat-shaped steel plate and the second hat-shaped steel plate of the present invention.

Fig. 5 is a schematic view of the use state of Embodiment 2 of the present invention.

Fig. 6 is a schematic structural view of the tunnel support unit in Embodiment 2 of the present utility model.

Fig. 7 is a schematic diagram of the connection relationship between the supporting steel pipe and the first connecting plate and the second connecting plate in Embodiment 2 of the present utility model.

Explanation of reference signs:

1—Tunnel support unit; 1-1—Support steel pipe; 1-2—First hat-shaped steel plate;

1-3—the second hat-shaped steel plate; 1-4—connecting steel pipe; 1-5—the first fixed steel pipe;

1-6—the second fixed steel pipe; 1-7—the third fixed steel pipe; 1-8—the fourth fixed steel pipe;

1-9—the first fixed lock; 1-10—the second fixed lock; 1-11—the third fixed lock;

1-12—the fourth fixed lock; 1-13—inverted T-shaped plate; 1-14—connection lock;

1-15—the first connecting plate; 1-16—the second connecting plate; 2—the tunnel face;

3—surrounding rock.

Detailed ways

Example 1

As shown in Figure 1, Figure 2, Figure 3 and Figure 4, a steel tube and steel plate combined tunnel support structure includes a plurality of tunnel supports connected in sequence and inserted into the outer surrounding rock 3 of the tunnel face 2 along the extension direction of the tunnel. A protection unit 1, the tunnel support unit 1 includes a support steel pipe 1-1 and two first hat-shaped steel plates 1-2 connected to the support steel pipe 1-1, and the support steel pipe 1-1 is set Between the two first hat-shaped steel plates 1-2, a second hat-shaped steel plate 1-3 is connected to the side of the first hat-shaped steel plate 1-2 away from the support steel pipe 1-1, and the support The protective steel pipe 1-1 is provided with two connecting steel pipes 1-4 with connection locks 1-14, and the first hat-shaped steel plate 1-2 is provided with a first fixed steel pipe 1-5 and a second fixed steel pipe 1-5. Steel pipe 1-6, the first fixed steel pipe 1-5 is provided with a first fixed lock 1-9 extending along its length direction, and the second fixed steel pipe 1-6 is provided with a first fixed lock opening 1-9 extending along its length direction The second fixed lock 1-10, the third fixed steel pipe 1-7 and the fourth fixed steel pipe 1-8 are arranged on the second hat-shaped steel plate 1-3, and the third fixed steel pipe 1-7 is provided with The third fixed lock 1-11 extending along its length direction, the fourth fixed steel pipe 1-8 is provided with a fourth fixed lock 1-12 extending along its length direction, the first fixed lock 1 -9 is connected to the connection lock 1-14, the second fixed lock 1-10 is connected to the third fixed lock 1-11, and two adjacent tunnel support units 1 pass through the fourth fixed lock Port 1-12 snap-in connection.

In this embodiment, a continuous support structure for supporting the surrounding rock 3 as a whole can be formed by setting a steel tube and steel plate combined tunnel support structure, which has a good support effect and ensures the safety of tunnel construction. During specific construction, a tunnel support unit 1 is first inserted into the surrounding rock 3 from the tunnel vault, and then a tunnel support unit 1 is respectively connected on both sides of the tunnel support unit 1, and two adjacent tunnel supports The protection unit 1 is fastened and connected to form an integral support structure.

In this embodiment, the tunnel support structure adopts a combination of steel pipes and steel plates, mainly through the connection of the steel pipes to ensure the overall rigidity of the entire tunnel support structure, and to avoid the occurrence of damage during the insertion of the tunnel support unit 1 into the surrounding rock 3. Deviations thus cause trouble for tunnel excavation.

As shown in Figure 3, an inverted T-shaped plate 1-13 fixedly connected to it is arranged under the supporting steel pipe 1-1, and two connecting steel pipes 1-4 are arranged on the inverted T-shaped plate 1 one by one. Both ends of -13.

In this embodiment, through the connection form of the supporting steel pipe 1-1 and the inverted T-shaped plate 1-13, the connection to the adjacent hat-shaped steel plate can be effectively realized. The overall rigidity requirement of the structure.

In this embodiment, the first fixed lock 1-9 is welded to the connection lock 1-14, and the second fixed lock 1-10 is welded to the third fixed lock 1-11.

Example 2

As shown in Fig. 5, Fig. 6 and Fig. 7, the difference between this embodiment and Embodiment 1 is that a first connecting plate 1-15 is provided on one side of the supporting steel pipe 1-1, and the supporting The other side of the steel pipe 1-1 is provided with a second connecting plate 1-16, one end of the first connecting plate 1-15 is fixedly connected to the supporting steel pipe 1-1, and a connecting steel pipe 1-4 is arranged on the first connecting The other end of the plate 1-15 and one end of the second connecting plate 1-16 are fixedly connected to the supporting steel pipe 1-1, and another connecting steel pipe 1-4 is arranged at the other end of the second connecting plate 1-16.

In this embodiment, by adopting the structural form of the supporting steel pipe 1-1, the first connecting plate 1-15 and the second connecting plate 1-16, the connection of two adjacent hat-shaped steel plates can be effectively realized, and the improved It meets the overall rigidity requirements of the tunnel support structure, and its structure is simple and easy to process.

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any simple modifications, changes and equivalent structural transformations made to the above embodiments according to the technical essence of the present utility model still belong to Within the scope of protection of the technical solution of the utility model.

Claims (4)

1. A steel tube and steel plate combined tunnel support structure, characterized in that: it includes a plurality of tunnel support units (1) connected in sequence and inserted into the tunnel face (2) outside surrounding rock (3) along the extension direction of the tunnel , the tunnel support unit (1) includes a support steel pipe (1-1) and two first hat-shaped steel plates (1-2) connected with the support steel pipe (1-1), the support The steel pipe (1-1) is arranged between the two first hat-shaped steel plates (1-2), and the side of the first hat-shaped steel plate (1-2) away from the supporting steel pipe (1-1) is connected There is a second hat-shaped steel plate (1-3), the supporting steel pipe (1-1) is provided with two connecting steel pipes (1-4) with connecting locks (1-14), the first A hat-shaped steel plate (1-2) is provided with a first fixed steel pipe (1-5) and a second fixed steel pipe (1-6), and the first fixed steel pipe (1-5) is provided with Extended first fixed lock (1-9), the second fixed steel pipe (1-6) is provided with a second fixed lock (1-10) extending along its length direction, the second hat-shaped The steel plate (1-3) is provided with a third fixed steel pipe (1-7) and a fourth fixed steel pipe (1-8), and the third fixed steel pipe (1-7) is provided with a first steel pipe extending along its length direction. Three fixed locks (1-11), the fourth fixed steel pipe (1-8) is provided with a fourth fixed lock (1-12) extending along its length direction, the first fixed lock (1 -9) It is connected with the connecting lock (1-14), the second fixed lock (1-10) is connected with the third fixed lock (1-11), and two adjacent tunnels are supported The unit (1) is fastened and connected through the fourth fixed locking socket (1-12). 2. A steel pipe steel plate combined tunnel support structure according to claim 1, characterized in that: an inverted T-shaped plate (1-13) fixedly connected to it is arranged under the support steel pipe (1-1) , the two connecting steel pipes (1-4) are arranged at both ends of the inverted T-shaped plate (1-13) in one-to-one correspondence. 3. A steel tube and steel plate combined tunnel support structure according to claim 1, characterized in that: one side of the support steel tube (1-1) is provided with a first connecting plate (1-15), the The other side of the supporting steel pipe (1-1) is provided with a second connecting plate (1-16), and one end of the first connecting plate (1-15) is fixedly connected to the supporting steel pipe (1-1), A connecting steel pipe (1-4) is arranged on the other end of the first connecting plate (1-15), one end of the second connecting plate (1-16) is fixedly connected with the supporting steel pipe (1-1), and the other The connecting steel pipe (1-4) is arranged on the other end of the second connecting plate (1-16). 4. A steel tube and steel plate combined tunnel support structure according to claim 1, characterized in that: the first fixed lock (1-9) is welded to the connecting lock (1-14), The second fixed lock (1-10) is welded to the third fixed lock (1-11).