A steel door frame for converting horizontal hole to regular hole

Abstract

The utility model belongs to the technical field of tunnel construction, and specifically proposes a steel portal frame for converting a transverse tunnel to a main tunnel, including a pair of tightly spliced ​​support frames, the support frame including a square mounting frame, the middle positions of the inner sides of the frames on both sides of the mounting frame are respectively connected to mounting plates; an arched bracket is mounted on the mounting plate, and the top of the arched bracket is connected to the top frame of the support frame; a protective arch is arranged on the top of the mounting frame close to the transverse tunnel, and a supporting beam is arranged on the top of the mounting frame close to the main tunnel. The utility model supports the main tunnel and the transverse tunnel respectively with support frames, and uses components such as arched brackets and supporting columns to strengthen the bearing capacity of the support frames, and the symmetrically arranged support frames play a supporting role on the transverse tunnel and the main tunnel, thereby ensuring the construction safety from the transverse tunnel to the main tunnel.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to a steel door frame for converting a horizontal tunnel into a regular tunnel. Background Art

[0002] With the vigorous development of domestic infrastructure construction, railway engineering transportation infrastructure has gradually developed from plain areas to mountainous and plateau areas. The number and mileage of tunnels are getting longer and longer, which has brought great difficulties to the construction of tunnels.

[0003] A cross tunnel refers to a passage that intersects the main tunnel of a tunnel vertically or horizontally. It is used to connect different tunnels or provide emergency escape passages. Many tunnels now adopt a construction plan that combines cross tunnels with main tunnels based on construction conditions. During the construction process, the intersection of the cross tunnel and the main tunnel is often the weakest structural position in the tunnel project. It has a special structure and a complex stress state. It is an important link to ensure construction safety. Therefore, there are high requirements for the overall stability of the intersection of the cross tunnel and the main tunnel. Utility Model Content

[0004] The utility model aims to solve the technical problems in the related art at least to a certain extent. To this end, the utility model proposes a steel door frame for converting a horizontal hole into a normal hole.

[0005] The technical solution of the utility model to solve the technical problem is: a steel door frame for converting a horizontal hole to a main hole, including a pair of tightly spliced ​​support frames, the support frames including square mounting frames, the middle positions of the inner sides of the frames on both sides of the mounting frames are respectively connected to mounting plates; an arch bracket is installed on the mounting plate, and the top of the arch bracket is connected to the top frame of the support frame; a protective arch is arranged on the top of the mounting frame close to the horizontal hole, and a supporting beam is arranged on the top of the mounting frame close to the main hole.

[0006] Preferably, the support beam includes a fixing plate, which is fixed to the top of the installation frame, the fixing plate is connected to a supporting pillar, the top of the pillar is connected to a horizontally placed connecting plate, and a plurality of positioning holes are vertically opened on the connecting plate.

[0007] Preferably, the supporting beam includes a bottom support, a limiting groove is opened on the inner wall of the bottom support, the bottom of the bottom support is rotatably connected to a threaded transmission rod with a thread, and the threaded transmission rod is driven to rotate by a motor; the inner side of the bottom support is slidably connected to the top support, a limiting plate is provided on the outer wall of the top support, which cooperates with the limiting groove to ensure that the top support does not rotate, and a thread that cooperates with the threaded transmission rod is provided on the inner wall of the top support, and the rotation of the threaded transmission rod drives the top support to slide along the inner wall of the bottom support; a first bolt hole connecting the bottom plate and the mounting frame is opened on the bottom support, and a second bolt hole connecting the main hole is opened on the top support.

[0008] Preferably, the side wall of the bottom support is provided with fixing holes, and the inner wall of the top support is provided with a plurality of fixing grooves vertically at corresponding positions.

[0009] Preferably, a plurality of supporting columns are provided between the top of the mounting frame and the arched support.

[0010] Preferably, a plurality of reinforcing ribs are provided between the bottom of the mounting plate and the mounting frame.

[0011] Preferably, a tie rod for support is connected between the top of the guard arch and the top of the installation frame.

[0012] Preferably, the bottom of the mounting frame is connected to the transverse plate.

[0013] Compared with the prior art, the above technical solution has the following advantages or beneficial effects:

[0014] 1. The utility model adopts support frames to support the main tunnel and the transverse tunnel respectively, and adopts arch brackets, support columns and other components to strengthen the load-bearing capacity of the support frames. The symmetrically arranged support frames support the transverse tunnel and the main tunnel, thereby ensuring the construction safety at the transition from the transverse tunnel to the main tunnel.

[0015] 2. The utility model can use the retractable support beam to synchronously start the motor in the support beam after the support frame is installed, so that the top of the support beam can completely support the top of the main hole, thereby improving the reliability of the top support. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0017] Figure 1 It is a structural diagram of the utility model.

[0018] Figure 2 It is a side view of the utility model.

[0019] Figure 3 It is a schematic diagram of the structure of point A of the utility model.

[0020] Figure 4 It is a schematic diagram of the structure of point B of the utility model.

[0021] Figure 5 It is a structural schematic diagram of the support beam in the second embodiment.

[0022] Figure 6 It is a cross-sectional view of the joist in the second embodiment.

[0023] Figure 7 It is a schematic diagram of the installation position of the utility model in a hole.

[0024] Description of reference numerals:

[0025] 1. Support frame; 2. Mounting frame; 3. Arch bracket; 4. Support column; 5. Mounting plate; 6. Reinforcement ribs; 8. Arch guard; 9. Tie rod; 10. Support beam; 11. Fixing plate; 12. Pillar; 13. Connecting plate; 14. Positioning hole; 15. Cross plate; 101. Bottom support; 102. First bolt hole; 103. Fixing hole; 104. Fixing slot; 105. Second bolt hole; 106. Top support; 107. Threaded transmission rod; 108. Limiting slot; 109. Motor; 1010. Bottom plate; 1011. Limiting plate. DETAILED DESCRIPTION

[0026] In order to clearly illustrate the technical features of this solution, the utility model is described in detail below through specific implementation methods and in combination with the accompanying drawings. The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. In addition, the utility model can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. It should be noted that the components illustrated in the accompanying drawings are not necessarily drawn to scale. The utility model omits the description of known components and processing technologies and processes to avoid unnecessary limitations on the utility model. The terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] Embodiment 1:

[0028] refer to Figure 1-Figure 4A steel door frame for converting a horizontal hole to a straight hole includes a pair of tightly spliced ​​support frames 1, the support frame 1 includes a square mounting frame 2, and mounting plates 5 are symmetrically provided at the middle position of the inner sides of the frames on both sides of the mounting frame 2; an arched bracket 3 is installed on the mounting plate 5, and the top of the arched bracket 3 is connected to the top frame of the support frame 1, and a plurality of supporting columns 4 are provided between the top of the mounting frame 2 and the arched bracket 3. The arched bracket 3 and the plurality of supporting columns 4 disperse the pressure received on the top of the mounting frame 2 to prevent stress concentration; by arranging the mounting plate 5 and the reinforcing ribs 6, the force of the arched bracket 3 is transmitted to the bottom of the mounting frame 2 to maintain the overall structural stability.

[0029] A protective arch 8 is arranged on the top of the installation frame 2 near the transverse hole, and a tie rod 9 is arranged between the installation frame 2 and the protective arch 8 for support. The protective arch 8 is arranged on one side of the transverse hole for top support of the transverse hole, and the tie rod 9 is arranged to prevent the protective arch 8 from deformation.

[0030] A joist 10 is arranged on the top of the installation frame 2 near the main hole. The joist 10 includes a fixing plate 11, a pillar 12, a connecting plate 13 and a positioning hole 14. The joist 10 is arranged on the installation frame 2 through the fixing plate 11. The pillar 12 is vertically arranged on the fixing plate 11. The connecting plate 13 is horizontally arranged on the pillar 12. The connecting plate 13 is vertically arranged with a plurality of positioning holes 14. The plurality of positioning holes 14 arranged on the joist 10 are used to connect the main hole steel door arch frame to prevent the main hole steel door arch frame from deflecting.

[0031] A transverse plate 15 is provided at the lower part of the installation frame 2. The transverse plate 15 increases the contact area between the installation frame 2 and the ground, reduces the pressure of the installation frame 2 on the ground, and supports the installation frame 2 in the horizontal direction.

[0032] How it works: See Figure 7 The steel door frame can be fixed to the surrounding rock of the transverse hole by locking anchor rods. The pressure above the transverse hole is transmitted to the installation frame 2 through the protective arch 8 and the tie rod 9. The pressure above the main hole is transmitted to the installation frame 2 through the support beam 10. The pressure received by the installation frame 2 is dispersed through the arch support 3 and multiple supporting columns 4. At the same time, the horizontal plate 15 at the bottom of the installation frame 2 reduces the pressure on the ground.

[0033] Embodiment 2:

[0034] See also Figure 5 and Figure 6, other structures are the same as those in the first embodiment, except that the supporting beam 10 includes a bottom support 101, a limiting groove 108 is opened on the inner wall of the bottom support 101, the bottom of the bottom support 101 is rotatably connected to a threaded transmission rod 107 with a thread, and the threaded transmission rod 107 is driven to rotate by a motor 109; the inner side of the bottom support 101 is slidably connected to the top support 106, and a limiting plate 1011 is provided on the outer wall of the top support 106, which cooperates with the limiting groove 108 to ensure that the top support 106 does not rotate, and a thread that cooperates with the threaded transmission rod 107 is provided on the inner wall of the top support 106, and the threaded transmission rod 107 rotates to drive the top support 106 to slide along the inner wall of the bottom support 101; the bottom support 101 is provided with a first bolt hole 102 connecting the bottom plate 1010 and the mounting frame 2, and the top support 106 is provided with a second bolt hole 105 connected to the main hole steel door arch frame. The side wall of the bottom bracket 101 is provided with fixing holes 103 , and the inner wall of the top bracket 106 is provided with a plurality of fixing grooves 104 vertically at corresponding positions for installing positioning pins.

[0035] Working principle: The other parts are the same as those in Example 1. When installing the steel door frame of the main hole, first lower the support beam 10 to the lowest position, and install it on the top of the installation frame 2 with bolts through the bottom support 101 and the bottom plate 1010. After erecting the support frame 1, start the motor 109. The motor 109 drives the threaded transmission rod 107 to rotate, and the top support 106 is continuously lifted up. After it is pushed onto the main hole steel door arch frame, connect the support beam 10 with the main hole steel door arch frame with bolts and install the positioning pins to stabilize it. Then support the cross hole through the support frame 1 and then splice the two support frames 1 to realize the support connection of the cross hole to the main hole part.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A steel portal frame for converting a horizontal hole to a normal hole, characterized in that: The invention comprises a pair of tightly connected support frames (1), wherein the support frame (1) comprises a square mounting frame (2), wherein the middle positions of the inner sides of the frames on both sides of the mounting frame (2) are respectively connected to mounting plates (5); an arched support (3) is mounted on the mounting plate (5), and the top of the arched support (3) is connected to the top frame of the support frame (1); a protective arch (8) is arranged on the top of the mounting frame (2) close to the transverse hole, and a supporting beam (10) is arranged on the top of the mounting frame (2) close to the main hole.

2. The horizontal hole to straight hole steel gantry according to claim 1, characterized in that: The support beam (10) comprises a fixing plate (11), the fixing plate (11) being fixed to the top of the installation frame (2), the fixing plate (11) being connected to a supporting pillar (12), the top of the pillar (12) being connected to a horizontally placed connecting plate (13), and the connecting plate (13) being provided with a plurality of positioning holes (14) in a vertical direction.

3. The horizontal hole to straight hole steel portal frame according to claim 1, characterized in that: The supporting beam (10) comprises a bottom support (101), a limiting groove (108) is formed on the inner wall of the bottom support (101), the bottom of the bottom support (101) is rotatably connected to a threaded transmission rod (107) with threads, and the threaded transmission rod (107) is driven to rotate by a motor (109); the inner side of the bottom support (101) is slidably connected to a top support (106), a limiting plate (1011) is formed on the outer wall of the top support (106), and the limiting plate cooperates with the limiting groove (108) to ensure that the top support (106) does not rotate, and a thread that cooperates with the threaded transmission rod (107) is formed on the inner wall of the top support (106), and the threaded transmission rod (107) rotates to drive the top support (106) to slide along the inner wall of the bottom support (101); the bottom support (101) is formed with a first bolt hole (102) connecting the bottom plate (1010) and the mounting frame (2), and the top support (106) is formed with a second bolt hole (105) connected to the positive hole.

4. The horizontal hole to straight hole steel gantry according to claim 3, characterized in that: A fixing hole (103) is formed on the side wall of the bottom bracket (101), and a plurality of fixing grooves (104) are formed vertically at corresponding positions on the inner wall of the top bracket (106).

5. The horizontal hole to straight hole steel portal frame according to claim 1, characterized in that: A plurality of supporting columns (4) are provided between the top of the installation frame (2) and the arched support (3).

6. The steel portal frame for converting a horizontal hole to a normal hole according to claim 1, characterized in that: A plurality of reinforcing ribs (6) are provided between the bottom of the mounting plate (5) and the mounting frame (2).

7. The horizontal hole to straight hole steel portal frame according to claim 1, characterized in that: A tie rod (9) for support is connected between the top of the protective arch (8) and the top of the installation frame (2).

8. A horizontal hole to straight hole steel portal frame according to any one of claims 1 to 7, characterized in that: The bottom of the mounting frame (2) is connected to the horizontal plate (15).

Images