Portal arch for tunnel portal construction

Abstract

The utility model discloses a tunnel portal lagging jack for tunnel portal construction, which comprises a lagging jack main body, a support frame and an outer protective layer, the lagging jack main body consists of a plurality of support sections, each support section is an arched shell and comprises a top shell and two side shells, first supports are fixedly mounted at two ends of the top shell of each support section, and second supports are fixedly mounted at two ends of the top shell of each support section. The supporting section and the adjacent supporting section are rotatably connected through a first support, a plurality of second supports are installed on a side shell of the supporting section, and the second supports are used for installing adjusting rods; the supporting frame is arranged below the arch frame body, a third support is installed on a side shell of the supporting section, a plurality of connecting supports are arranged on the periphery of the supporting frame, the third support is fixedly connected with the connecting supports through installation adjusting rods, and the outer protection layer is detachably installed on the arch frame body. The arch frame body can be matched with the actual shape of the tunnel door opening by adjusting the arch frame body, and the arch frame has the advantages of being high in flexibility and practicability.

Description

Technical Field

[0001] The utility model relates to the technical field related to tunnel construction, and specifically relates to a portal arch for tunnel portal construction. Background Technique

[0002] The tunnel arch can bear the pressure of the tunnel top and the surrounding soil layers, ensuring the safety and stability of the tunnel construction during the construction process. Without the support of the arch, the tunnel is likely to collapse and other catastrophic events may occur. The contour of the tunnel portal arch is generally fixed. However, it is very difficult for the excavated portal at the construction site to completely match the shape of the arch, and there is often a problem that the portal excavation is too large. Therefore, on-site construction workers need to carry out additional plugging and support. To solve this problem, we want to design an adjustable and more flexible portal arch. Content of the Utility Model

[0003] The purpose of the utility model is to provide a portal arch for tunnel portal construction to solve the problems put forward in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution:

[0005] A portal arch for tunnel portal construction, comprising: an arch main body, a support frame and an outer protective layer. The arch main body is composed of several support sections, these support sections are connected end to end and can be rotatably connected to each other. The support section is an arched shell, including a top shell and side shells on both sides. First brackets are fixedly installed at the left and right ends of the top shell of the support section. The support section and the adjacent support section are rotatably connected through the first brackets. Several second brackets are installed on the side shell of the support section. The second brackets are used to install adjusting rods, and the head and tail ends of the adjusting rods are respectively connected to two adjacent support sections; the support frame is arranged below the arch main body. Third brackets are installed on the side shell of the support section. Several connecting brackets are arranged on the periphery of the support frame. The third brackets are fixedly connected to the connecting brackets through the installation of adjusting rods. The outer protective layer is detachably installed on the arch main body.

[0006] As a further scheme of the utility model: the adjusting rod is a double-headed threaded adjusting rod or an electric control adjusting rod.

[0007] As a further scheme of the utility model: the outer protective layer is a layer of soft pad, made of elastic material, covered and installed on the arch main body and can be detached.

[0008] As a further scheme of the utility model: the outer protective layer is a layer of inflatable pad.

[0009] As a further scheme of the utility model: the support section is internally provided with a top shell and side shells reinforced with reinforcing ribs.

[0010] As a further solution of the present utility model: The first brackets at both ends of the support section are rotatably connected by installation pins or bolts.

[0011] As a further solution of the present utility model: Second brackets and third brackets are provided on the side shells on both sides of the support section, and two circles of connecting brackets are correspondingly arranged around the support frame.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: The arch frame body of the present utility model can be adjusted to fit the actual shape of the tunnel portal by itself, and has the advantages of high flexibility and strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0014] Figure 2 It is a schematic perspective view of the arch frame body and the support frame of the present utility model.

[0015] Figure 3 It is a schematic front view structure diagram of the support frame of the present utility model.

[0016] Figure 4 It is a schematic front view structure diagram of the arch frame body of the present utility model.

[0017] Figure 5 It is a schematic diagram of the connection structure of the support section of the present utility model Figure 1 .

[0018] Figure 6 It is a schematic diagram of the connection structure of the support section of the present utility model Figure 2 . DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] Refer to Figures 1-6, in the embodiment of the present utility model, a portal arch for tunnel portal construction includes: an arch frame main body 1, a support frame 2, and an outer protective layer 3. The arch frame main body 1 is composed of several support sections 11, these support sections 11 are connected end to end, and are rotatably connected to each other. The support section 11 is an arched shell, including a top shell 111 and side shells 112 on both sides. The top shell 111 of the support section 11 fixedly installs a first bracket 12 at the left and right ends. The support section 11 and the adjacent support section 11 are rotatably connected through the first bracket 12. A plurality of second brackets 121 are installed on the side shell 112 of the support section 11, and the second brackets 121 are used to install the adjusting rod 13. The head and tail ends of the adjusting rod 13 are respectively connected to two adjacent support sections 11;

[0021] The first brackets 121 at the head and tail ends of the support section 11 are rotatably connected through installation pins or bolts. The top shell 111 and the side shell 112 reinforced by the reinforcing ribs 113 are arranged inside the support section 11. The reinforcing ribs 113 play a role in strengthening the support section 11, making its structure more stable.

[0022] Since the length of the adjusting rod 13 is adjustable and the support sections 11 are rotatably connected to each other, by adjusting the length of the adjusting rod 13 between the support sections 11, the overall shape of the arch frame main body 1 can be adjusted to fit the tunnel portal. In addition, the outer protective layer 3 is detachably installed on the arch frame main body 1. The outer protective layer 3 is a layer of soft pad or inflatable pad, made of elastic material, and is covered and installed on the arch frame main body 1. The outer protective layer 3 is in contact with the tunnel soil layer. After the overall shape of the arch frame main body 1 changes, the shape of the outer protective layer 3 changes accordingly. Since the outer protective layer 3 itself has elasticity and has a certain self-adaptive effect, it can play the role of a buffer pad and an adjusting pad, making the arch frame main body 1 fit more closely with the tunnel portal.

[0023] The support frame 2 is arranged below the arch frame main body 1. A third bracket 122 is installed on the side shell 112 of the support section 11. A plurality of connecting brackets 21 are arranged on the periphery of the support frame 2. The third bracket 122 is fixedly connected to the connecting bracket 21 through the installation of the adjusting rod 13. Second brackets 121 and third brackets 122 are provided on both side shells 112 of the support section 11. Two circles of connecting brackets 21 are correspondingly arranged on the periphery of the support frame 2.

[0024] The support frame 2 is fixedly connected to the arch frame main body 1 through the adjusting rod 13, playing a supporting role for the arch frame main body 1. Since the length of the adjusting rod 13 is adjustable, even if the shape of the arch frame main body 1 changes, by adjusting the length of the adjusting rod 13, it can still be fixedly connected to the support frame 2.

[0025] The adjusting rod 13 is a double-thread adjusting rod or an electric control adjusting rod. If a double-thread adjusting rod is adopted, manual adjustment by construction workers is required. If an electric control adjusting rod is adopted, electric control adjustment can be carried out, which is more labor-saving. Also, some of the adjusting rods 13 can use double-thread adjusting rods and some can use electric control adjusting rods. For the specific usage method, the double-thread adjusting rod or the electric control adjusting rod can be selected according to the actual situation.

[0026] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0027] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An arch frame for tunnel portal construction, comprising: An arch support main body (1), a support frame (2) and an outer protective layer (3), characterized in that the arch support main body (1) is composed of a plurality of support sections (11), these support sections (11) are connected end to end and are rotatably connected to each other, the support section (11) is an arched shell, including a top shell (111) and side shells (112) on both sides, the top shell (111) of the support section (11) fixedly installs a first bracket (12) at the left and right ends, the support section (11) and the adjacent support section (11) are rotatably connected through the first bracket (12), a plurality of second brackets (121) are installed on the side shell (112) of the support section (11), the second bracket (121) is used to install an adjusting rod (13), and the head and tail ends of the adjusting rod (13) are respectively connected to two adjacent support sections (11); the support frame (2) is arranged below the arch support main body (1), a third bracket (122) is installed on the side shell (112) of the support section (11), a plurality of connecting brackets (21) are arranged on the periphery of the support frame (2), and the third bracket (122) is fixedly connected to the connecting bracket (21) by installing an adjusting rod (13), and the outer protective layer (3) is detachably installed on the arch support main body (1).

2. The portal arch for tunnel entrance construction according to claim 1, characterized in that: The adjusting rod (13) is a double-headed threaded adjusting rod or an electric control adjusting rod.

3. The portal arch support for tunnel entrance construction according to claim 1, wherein: The outer protective layer (3) is a layer of soft pad, made of elastic material, covered and installed on the arch support main body (1), and the outer protective layer (3) is detachable.

4. A portal arch for tunnel portal construction according to claim 1, characterized in that: The outer protective layer (3) is a layer of inflatable pad.

5. The portal arch for tunnel portal construction according to claim 1, characterized in that: Reinforcing ribs (113) are arranged inside the support section (11) to reinforce the top shell (111) and the side shell (112).

6. The portal arch for tunnel portal construction according to claim 1, wherein: The first brackets (121) at the head and tail ends of the support section (11) are rotatably connected by installing pins or bolts.

7. The portal arch for tunnel entrance construction according to claim 1, characterized in that: Second brackets (121) and third brackets (122) are arranged on the side shells (112) on both sides of the support section (11), and two circles of connecting brackets (21) are correspondingly arranged on the periphery of the support frame (2).

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