Pipe shed forepoling structure

Abstract

The utility model discloses a pipe shed forepoling structure which comprises arched steel and a plurality of anchor rods. A plurality of first through holes are evenly formed in the arched steel in sequence, first anchor holes are formed in the construction face right opposite to the first through holes, the first anchor holes are used for installing the anchor rods, and the anchor rods located in the first anchor holes penetrate through the first through holes; a plurality of second anchor holes are uniformly formed in the arch-shaped inner side direction of the arch-shaped steel along an arch ring arc line, the second anchor holes are used for mounting the anchor rods, and the arch ring arc line is designed according to the terrain; every two adjacent anchor rods located in the second anchor holes are connected through a connecting rod, and the anchor rods located in the second anchor holes are connected with the anchor rods located in the first anchor holes around the anchor rods through supporting rods. The shape of the arch-shaped steel is not related to the arc of the arch ring, the same arch-shaped steel can be applied to tunnel construction under various conditions, and meanwhile the supporting effect can be enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to a pipe roof advance support structure. Background Art

[0002] During tunnel construction, the pipe-roof method, also known as the umbrella-arch method, is often used during tunnel excavation. This method is a pre-excavation support technology for shallow underground structures. The core of the pipe-roof method involves pre-drilling and installing thick-walled steel pipes with a large moment of inertia near the arc of the lining arch of the upcoming tunnel or underground structure. This serves as temporary pre-excavation support. This measure aims to prevent soil collapse and surface subsidence, ensuring the safe progress of excavation operations and subsequent support procedures.

[0003] In tunnel construction projects, more than one tunnel often needs to be excavated. When each tunnel is excavated, pipe-roof advance support is mostly used to support the tunnel entrance. When constructing the pipe-roof advance support, first design a suitable arch ring arc according to the conditions of the underground structure. Then, the arch steel is customized in the factory according to the designed arch ring arc. Only then can construction and support be carried out on site. After the construction is completed, the pipe-roof advance support structure is dismantled. In actual construction, the underground structure is complex. When excavating the tunnel, it is impossible to ensure that the arch steel required for all the entrances is exactly the same. This will result in the need for different pipe-roof advance support structures. Each pipe-roof advance support structure needs to be customized according to the actual situation and then transported to the construction site. During transportation, due to the huge size of the arch steel, the pipe-roof advance support structure is not easy to transport. Utility Model Content

[0004] The technical problem to be solved by the present invention is to provide a pipe-roof advance support structure in view of the deficiencies in the above-mentioned prior art, thereby solving the problems mentioned in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a pipe roof advance support structure, including arched steel and a plurality of anchor rods;

[0006] A plurality of first through holes are uniformly opened in sequence on the arched steel, and a first anchor hole is provided on the construction surface opposite to the first through hole. The first anchor hole is used to install the anchor rod, and the anchor rod located in the first anchor hole passes through the first through hole;

[0007] A plurality of second anchor holes are evenly opened on the inner side of the arch steel along the arc line of the arch ring, and the second anchor holes are used to install the anchor rods. The arc line of the arch ring is designed according to the terrain;

[0008] Two adjacent anchor rods located in the second anchor holes are connected by a connecting rod, and the anchor rod located in the second anchor hole is connected to the surrounding anchor rods located in the first anchor holes by a supporting rod.

[0009] Furthermore, both ends of the bottom of the arched steel are respectively fixed on a support base, and the support base is fixed on the construction ground.

[0010] Furthermore, the arched steel is composed of a plurality of rotating rods connected end to end in sequence through a hinge mechanism, the rotating rod at the end is connected to the support seat through a hinge, and a plurality of the first through holes are sequentially opened on the rotating rod.

[0011] Furthermore, the hinge mechanism includes two circular plates arranged opposite to each other, and the two circular plates are connected by a rotating shaft. The rotating shaft is located at the edge of the circular plate, and the rotating shaft is hinged to the two adjacent rotating rods respectively. The rotating rod can rotate along the rotating shaft. The two circular plates are respectively and evenly provided with a plurality of second through holes of the same number, and the end edges of the rotating rods are respectively provided with a plurality of third through holes. The third through holes have the same diameter as the second through holes, and when the rotating rod is rotated to the set point, the third through holes coincide with the second through holes.

[0012] Furthermore, the rotating shaft passes through one of the second through holes, and the end of the rotating shaft is fixed on the hole wall of the second through hole.

[0013] Furthermore, the intersection of the two support rods is fixedly connected by welding.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] The utility model provides a pipe-roof advance support structure, which completes the preliminary support for the pipe-roof advance support by evenly opening a plurality of second anchor holes along the arc of the arch ring and installing anchor rods in the second anchor holes. In order to make the support more stable, traditional arch steel is used to reinforce the pipe-roof advance support. At the same time, anchor rods are used in the first through holes of the arch steel to fix the arch steel to increase the stability of the arch steel support. Finally, connecting rods and support rods are used to reinforce the double-layer support, thereby achieving a good support effect. Therefore, the shape of the arch steel has no correlation with the arc of the arch ring. The same arch steel can be used in tunnel construction in various situations, and the support effect can also be enhanced.

[0016] The utility model provides an advanced support structure for a pipe roof, which uses multiple rotating rods to be hinged at the head and tail to obtain arched steel. In this way, the arched steel is convenient to transport and is not easily damaged during transportation. At the same time, when the arched steel is at the construction site, the shape of the arched steel can be made as close to the arc line of the arch ring as possible, thereby increasing the uniform distribution and stability of the support.

[0017] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model provides a schematic diagram of the overall structure of a pipe roof advance support structure.

[0019] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0020] Figure 3 It is a structural diagram of the hinge mechanism in the present invention.

[0021] Figure 4 This is a schematic diagram of the connection structure between the transfer rod and the hinge mechanism in the utility model.

[0022] Description of the accompanying drawings:

[0023] 1. Support rod; 2. Connecting rod; 3. Anchor rod; 4. Rotating rod; 5. First through hole; 6. Articulated mechanism; 6-1. Circular plate; 6-2. Rotating shaft; 6-3. Second through hole; 6-4. Third through hole; 7. Support seat; 8. Articulated part. DETAILED DESCRIPTION

[0024] like Figure 1-4 As shown, the utility model provides a pipe roof advance support structure, including arch steel and a plurality of anchor rods 3;

[0025] A plurality of first through holes 5 are uniformly opened in sequence on the arched steel. A first anchor hole is provided on the construction surface opposite to the first through holes 5. The first anchor hole is used to install the anchor rod 3. The anchor rod 3 located in the first anchor hole passes through the first through hole 5.

[0026] A plurality of second anchor holes are evenly opened on the inner side of the arch steel along the arc line of the arch ring, and the second anchor holes are used to install the anchor rods 3. The arc line of the arch ring is designed according to the terrain.

[0027] Two adjacent anchor rods 3 located in the second anchor holes are connected by a connecting rod 2 , and the anchor rods 3 located in the second anchor hole are connected to the surrounding anchor rods 3 located in the first anchor holes by a supporting rod 1 .

[0028] During construction, the arch arc is first obtained according to the geological structure and topography of the construction site, and the arch arc is drawn on the construction surface. The arch steel is fixed in front of the construction surface, and a drilling machine is used to evenly open several second anchor holes along the arch arc. At the same time, the first anchor hole is opened along the first through hole 5 on the arch steel. Then the anchor rod 3 is installed in the first anchor hole and the second anchor hole, and then the support rod 1 and the connecting rod 2 are used to connect the anchor rods 3. In this way, the support effect can be strengthened.

[0029] The utility model completes the preliminary support for the pipe-roof advance support by evenly opening a number of second anchor holes along the arc of the arch ring and installing anchor rods in the second anchor holes. In order to make the support more stable, traditional arch steel is used to reinforce the pipe-roof advance support. At the same time, anchor rods 3 are used in the first through holes 5 of the arch steel to fix the arch steel to increase the stability of the arch steel support. Finally, connecting rods and support rods are used to reinforce the double-layer support to achieve a good support effect. Therefore, the shape of the arch steel has no correlation with the arc of the arch ring. The same arch steel can be used in tunnel construction in various situations, and the support effect can also be enhanced.

[0030] In the present invention, the two ends of the bottom of the arched steel are respectively fixed on a support base 7, and the support base 7 is fixed on the construction ground. When fixed by the support base 7, the support base 7 can be fixed to the construction ground by bolts.

[0031] At the same time, in order to facilitate the transportation of the arched steel, the arched steel is decomposed into individual rotating rods 4 connected end to end. The arched steel is composed of several rotating rods 4 connected end to end through a hinge mechanism 6 in sequence. The rotating rod 4 at the end is connected to the support seat 7 through a hinge 8, and a plurality of the first through holes 5 are opened on the rotating rod 4 in sequence.

[0032] In which, the hinge mechanism 6 includes two circular plates 6-1 arranged opposite to each other, and the two circular plates 6-1 are connected by a rotating shaft 6-2. The rotating shaft 6-2 is located at the edge of the circular plate 6-1, and the rotating shaft 6-2 is hinged to the two adjacent rotating rods 4 respectively. The rotating rod 4 can rotate along the rotating shaft 6-2. The two circular plates 6-1 are respectively and evenly provided with a plurality of second through holes 6-3 of the same number, and the end edges of the rotating rod 4 are respectively provided with a plurality of third through holes 6-4. The third through holes 6-4 have the same diameter as the second through holes 6-3, and when the rotating rod 4 rotates to the set point, the third through holes 6-4 coincide with the second through holes 6-3. In the present invention, when determining the angle between the two rotating rods 4, the two rotating rods 4 are adjusted to appropriate positions so that one of the third through holes 6-4 coincides with one of the second through holes 6-3, and the positions of the overlapping third through holes 6-4 and the second through holes 6-3 are fixed by bolts and nuts, thereby achieving angle fixation between the two rotating rods 4.

[0033] The rotating shaft 6-2 passes through one of the second through holes 6-3, and the end of the rotating shaft 6-2 is fixed to the hole wall of the second through hole 6-3. In this way, a wider angle can be adjusted between the two rotating rods 4.

[0034] The utility model uses multiple rotating rods 4 to be hinged at the end to obtain arch steel, which is convenient to transport and not easy to cause damage to the arch steel during transportation. At the same time, when the arch steel is at the construction site, the shape of the arch steel can be made as close to the arc line of the arch ring as possible, thereby increasing the uniform distribution and stability of the support.

[0035] In the present invention, the intersection of the two support rods 1 is fixedly connected by welding, thereby facilitating better support and strengthening the support structure.

[0036] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A pipe roof advance support structure, characterized in that: It includes an arch steel and a plurality of anchor rods (3); A plurality of first through holes (5) are uniformly opened in sequence on the arched steel, a first anchor hole is provided on the construction surface opposite to the first through hole (5), the first anchor hole is used to install the anchor rod (3), and the anchor rod (3) located in the first anchor hole passes through the first through hole (5); A plurality of second anchor holes are evenly opened on the inner side of the arch of the arch steel along the arc line of the arch ring, and the second anchor holes are used to install the anchor rods (3). The arc line of the arch ring is designed according to the terrain. Two adjacent anchor rods (3) located in the second anchor holes are connected via a connecting rod (2), and the anchor rods (3) located in the second anchor hole are connected to the surrounding anchor rods (3) located in the first anchor holes via a supporting rod (1).

2. A pipe roof advance support structure according to claim 1, characterized in that: The two ends of the bottom of the arched steel are respectively fixed on a support seat (7), and the support seat (7) is fixed on the construction ground.

3. A pipe roof advance support structure according to claim 2, characterized in that: The arched steel is composed of a plurality of rotating rods (4) connected end to end in sequence through a hinge mechanism (6), the rotating rod (4) at the end is connected to the support seat (7) through a hinge (8), and a plurality of the first through holes (5) are sequentially opened on the rotating rod (4).

4. A pipe roof advance support structure according to claim 3, characterized in that: The hinge mechanism (6) comprises two circular plates (6-1) arranged opposite to each other. The two circular plates (6-1) are connected via a rotating shaft (6-2). The rotating shaft (6-2) is located at the edge of the circular plate (6-1). The rotating shaft (6-2) is respectively hinged to two adjacent rotating rods (4). The rotating rods (4) can rotate along the rotating shaft (6-2). The two circular plates (6-1) are respectively and evenly provided with a plurality of second through holes (6-3) of the same number. The end edges of the rotating rods (4) are respectively provided with a plurality of third through holes (6-4). The third through holes (6-4) have the same diameter as the second through holes (6-3). When the rotating rods (4) rotate to a set position, the third through holes (6-4) coincide with the second through holes (6-3).

5. A pipe roof advance support structure according to claim 4, characterized in that: The rotating shaft (6-2) passes through one of the second through holes (6-3), and the end of the rotating shaft (6-2) is fixed on the hole wall of the second through hole (6-3).

6. A pipe roof advance support structure according to claim 1, characterized in that: The intersection of the two support rods (1) is fixedly connected by welding.

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