Tunnel construction channel junction intersection portal support device

Abstract

The utility model discloses a portal support device for an intersection at the junction of tunnel construction channels, which belongs to the technical field of tunnel support and comprises a profile steel arch frame positioned at the intersection between a constructed transverse channel and a tunnel main hole and a profile steel portal frame supported on the outer side of the profile steel arch frame. A plurality of vertical supporting frames are fixedly installed between the profile steel arch frame and the profile steel door frame, a plurality of supporting positions used for installing the vertical supporting frames are arranged on the profile steel arch frame, the connecting positions of the supporting positions and the vertical supporting frames are horizontally arranged, and bolt holes penetrating through the supporting positions are formed in the profile steel arch frame. Due to the fact that the top wall is arranged to be the horizontal supporting position, alignment of the vertical supporting frame is facilitated, a constructor can conveniently find the installation position of the vertical supporting frame, the installation position does not need to be marked before the vertical supporting frame is installed, the first end of the vertical supporting frame does not need to be cut into an arc shape, and the construction workload is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of tunnel support technology, specifically relating to a gantry support device at the intersection of tunnel construction passages. Background Technology

[0002] During tunnel construction, due to route and terrain constraints, tunnel support structures are required to reduce rock deformation and other adverse effects caused by excavation and to ensure the stability of the surrounding rock during the excavation process. In the construction of single-bore double-track tunnels with cross passages, the construction at the intersection between the cross passage and the main tunnel is more difficult. To ensure construction safety, the support structure used at the intersection between the cross passage and the main tunnel is crucial during tunnel excavation.

[0003] Existing technologies, such as Chinese Patent No. CN204312087U, disclose a reinforced support frame for the intersection of a tunnel cross passage and the main tunnel, which connects a steel arch frame and a steel portal frame through vertical support columns. However, in the above technology, the connection end between the vertical support column and the steel arch frame needs to be cut into a curved shape consistent with the arc surface of the arch frame on the construction site for ease of installation, which increases the construction difficulty and construction period.

[0004] Therefore, it is necessary to propose a gantry support device at the intersection of tunnel construction passages to solve the above problems. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a portal frame support device at the intersection of tunnel construction passages, which solves the problem that the installation of vertical support columns and steel arch frames in the prior art requires the processing of vertical support columns, which increases the amount of construction work.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides a portal frame support device at the intersection of a tunnel construction passage, including a steel arch frame located at the intersection between the constructed cross passage and the main tunnel, and a steel portal frame supported on the outside of the steel arch frame. Multiple vertical support frames are fixedly installed between the steel arch frame and the steel portal frame. Multiple support positions for installing the vertical support frames are provided on the steel arch frame. The connection between the support positions and the vertical support frames is horizontally arranged. Bolt holes penetrating the support positions are provided on the steel arch frame.

[0008] Furthermore, the support position is a first mounting groove set on the side of the steel arch frame near the vertical support frame, and the bottom wall of the first mounting groove is set horizontally.

[0009] Furthermore, the steel arch frame is provided with a first protrusion corresponding to the first mounting groove on the side away from the vertical support frame. The first protrusion is horizontally positioned away from the end of the first mounting groove, and the first protrusion is connected to the first mounting groove through bolt holes.

[0010] Furthermore, the first mounting groove is installed through the steel arch frame along the axial direction of the steel arch frame.

[0011] Furthermore, one end of the bottom wall of the first mounting groove is connected to the arc section of the steel arch frame.

[0012] Furthermore, the support position is a second protrusion located on the side of the steel arch frame near the handsome support frame, and the top wall of the second protrusion is horizontally positioned.

[0013] Furthermore, the steel arch frame is provided with a second mounting groove corresponding to the second protrusion on the side away from the vertical support frame. The top wall of the second mounting groove is horizontally set, and the second mounting groove and the second protrusion are connected through bolt holes.

[0014] The beneficial effects of this utility model are as follows:

[0015] This utility model, by setting a horizontal support position on the top wall, facilitates the alignment of the vertical support frame and makes it easier for construction personnel to accurately locate the installation position of the vertical support frame. It eliminates the need to mark the installation position before installing the vertical support frame and also eliminates the need to cut the first end of the vertical support frame into an arc shape, thus reducing the amount of construction work.

[0016] Other advantages, objectives, and features of this invention will be set forth in the following description and will be apparent to those skilled in the art to some extent, or may be learned by practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0017] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

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

[0019] Figure 2 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model.

[0020] The following are the markings in the attached diagram: 1. Steel arch frame, 101. First mounting groove, 102. First protrusion, 103. Second mounting groove, 104. Steel gantry frame, 2. Vertical support frame, 3. Detailed Implementation

[0021] Example 1, as Figure 1As shown in Figure 2, this utility model provides a portal frame support device at the intersection of a tunnel construction passage, comprising: a steel arch frame 1 located at the intersection between the constructed cross passage and the main tunnel, and a steel portal frame 2 supported on the outside of the steel arch frame 1. A plurality of vertical support frames 3 are fixedly installed between the steel arch frame 1 and the steel portal frame 2. The steel arch frame 1 is provided with a plurality of support positions for installing the vertical support frames 3. The connection between the support positions and the vertical support frames 3 is horizontally arranged. The steel arch frame 1 is provided with bolt holes (not shown in the figure) that penetrate the support positions.

[0022] In this scheme, the first end of the vertical support frame 3 is installed on the support position, the second end of the vertical support frame 3 abuts against the steel gantry 2, and then the first end of the vertical support frame 3 is fixedly connected to the support position and the second end of the vertical support frame 3 is fixedly connected to the steel gantry 2 by bolts.

[0023] This solution facilitates the alignment of the vertical support frame 3 by setting a horizontal support position on the top wall, making it easier for construction personnel to accurately locate the installation position of the vertical support frame 3. It eliminates the need to mark the installation position before installing the vertical support frame 3 and also eliminates the need to cut the first end of the vertical support frame 3 into an arc shape, thus reducing the amount of construction work.

[0024] Example 2, as Figure 1 Based on Embodiment 1, the support position is a first mounting groove 101 located on the side of the steel arch frame 1 near the vertical support frame 3, and the bottom wall of the first mounting groove 101 is horizontally positioned. The steel arch frame 1 has a first protrusion 102 corresponding to the first mounting groove 101 on the side away from the vertical support frame 3. The end of the first protrusion 102 away from the first mounting groove 101 is horizontally positioned, and the first protrusion 102 communicates with the first mounting groove 101 through bolt holes.

[0025] The first mounting groove 101 is provided through the steel arch frame 1 along the axial direction of the steel arch frame 1. This allows the vertical support frame 3 to be slidably mounted on the first mounting groove 101 along the axial direction of the steel arch frame 1.

[0026] One end of the bottom wall of the first mounting groove 101 is connected to the arc section of the steel arch frame 1, so that the first mounting groove 101 is notched to accommodate vertical support frames 3 of different widths.

[0027] Example 3, as Figure 2 Based on Embodiment 1, the support position is a second protrusion 103 located on the side of the steel arch frame 1 near the vertical support frame 3, and the top wall of the second protrusion 103 is horizontally arranged. The steel arch frame 1 is provided with a second mounting groove 104 corresponding to the second protrusion 103 on the side away from the vertical support frame 3, and the top wall of the second mounting groove 104 is horizontally arranged. The second protrusion 103 and the second mounting groove 104 are connected through bolt holes.

[0028] Compared with Example 2, Example 3 has the protrusion and the mounting groove positioned oppositely.

[0029] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A portal frame support device at the intersection of a tunnel construction passage, comprising a steel arch frame located at the intersection between the constructed cross passage and the main tunnel opening, and a steel portal frame supported on the outside of the steel arch frame, characterized in that: Multiple vertical support frames are fixedly installed between the steel arch frame and the steel portal frame. The steel arch frame is provided with multiple support positions for installing the vertical support frames. The connection between the support positions and the vertical support frames is horizontal. The steel arch frame is provided with bolt holes that pass through the support positions.

2. The tunnel construction passage junction gantry support device according to claim 1, characterized in that: The support position is a first mounting groove set on the side of the steel arch frame near the vertical support frame, and the bottom wall of the first mounting groove is set horizontally.

3. The tunnel construction passage junction gantry support device according to claim 2, characterized in that: The steel arch frame is provided with a first protrusion corresponding to the first mounting groove on the side away from the vertical support frame. The first protrusion is horizontally positioned away from the end of the first mounting groove, and the first protrusion is connected to the first mounting groove through bolt holes.

4. The gantry support device at the intersection of tunnel construction passages according to claim 2, characterized in that: The first mounting groove is installed through the steel arch frame along the axis of the steel arch frame.

5. The gantry support device at the intersection of tunnel construction passages according to claim 2, characterized in that: One end of the bottom wall of the first mounting groove is connected to the arc section of the steel arch frame.

6. The portal frame support device at the intersection of tunnel construction passages according to claim 1, characterized in that: The support position is a second protrusion located on the side of the steel arch frame near the handsome support frame, and the top wall of the second protrusion is horizontally set.

7. The tunnel construction passage junction gantry support device according to claim 6, characterized in that: The steel arch frame is provided with a second mounting groove corresponding to the second protrusion on the side away from the vertical support frame. The top wall of the second mounting groove is horizontally set, and the second mounting groove and the second protrusion are connected through bolt holes.

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