An adjustable subway construction tunnel support device

Abstract

The present invention relates to the technical field of mine tunnel support, and specifically to an adjustable subway construction tunnel support device, comprising a steel rope, two steel arches and two bases; the two bases are sequentially distributed along the horizontal direction perpendicular to the axial direction of the tunnel. The two steel arches are sequentially distributed along the axial direction of the tunnel, and are both composed of multiple arc-shaped steel segments. In the initial state, the two steel arches are both supported on the ground, and the tops of the arc-shaped structures of the two steel arches are respectively located on both sides of the line connecting the two bases; when in use, the two ends of each steel arch are respectively rotated around a horizontal axis perpendicular to the axial direction of the tunnel and installed on the two bases, and the steel arch can move relative to the base along the axial direction of the tunnel; the steel rope is used to alternately pass through the two steel arches, and the two steel arches can be driven to stand up to support the tunnel by stretching the two ends of the steel rope. The operation is simple, and the steel arch will not be further excessively tilted after standing up due to excessive tension, and the safety is high.

Description

Technical Field

[0001] The invention relates to the technical field of mine tunnel support, and in particular to an adjustable subway construction tunnel support device. Background Art

[0002] The initial support forms of tunnel engineering include sprayed anchor mesh support and steel frame anchor spray support. If the geological conditions are poor, the initial support needs to adopt steel grating arch frame or steel arch frame anchor spray support. The steel arch frame is processed in sections at the processing plant outside the tunnel. Before installation, it is transported to the tunnel face excavation site and manually assembled into two sections on the ground. Then it is erected and assembled. After welding and positioning with the excavation face anchor rods, longitudinal connecting steel bars are installed between the steel frames, steel mesh is installed, and finally, initial support concrete is sprayed.

[0003] The existing steel arch frame installation platform is only for workers to climb to the installation position on the inner wall of the tunnel, and then each steel arch frame segment is manually lifted to the installation position and assembled and installed. This installation method has high labor intensity and slow speed. In addition, the arch frame installation working surface is a newly excavated section with unstable surrounding rock, which is prone to falling rocks and injuring people, and is very dangerous. Summary of the invention

[0004] The invention provides an adjustable subway construction tunnel supporting device to solve the problems of slow installation operation and potential safety hazards of existing steel arch frames.

[0005] The adjustable subway construction tunnel support device of the present invention adopts the following technical solution:

[0006] An adjustable subway construction tunnel support device is used to support the tunnel top, including a steel rope, two steel arch frames and two bases; the two bases are sequentially distributed along the horizontal direction perpendicular to the tunnel axis and are respectively fixed on the ground on both sides close to the tunnel side walls; the two steel arch frames are sequentially distributed along the tunnel axis and are both composed of multiple arc-shaped steel segments, and the two adjacent steel segments of each steel arch frame are fixedly connected to form an arc-shaped structure coaxial with the tunnel top; the side of each steel arch frame is provided with an arc-shaped docking plate coaxial with the steel arch frame; the side of the two steel arch frames are provided with a plurality of threading ear plates, each steel segment has at least one threading ear plate, and the threading ear plates on the two steel arch frames are staggered in the circumferential direction of the steel arch frames; in the initial state, the two steel arch frames are both supported on the ground, and the two The top of the arc-shaped structure of the steel arch frame is located on both sides of the line connecting the two bases; when in use, the two ends of each steel arch frame are respectively installed on the two bases by rotating around a horizontal axis perpendicular to the axial direction of the tunnel, and the steel arch frame can move along the axial direction of the tunnel relative to the base; the steel rope alternately passes through the threading ear plates of the two steel arch frames, and then the two steel arch frames are caused to rotate around the hinge axis between them and the base by straightening the steel rope, so that the two steel arch frames are rotated to be coaxial with the top of the tunnel; then, while straightening the steel rope, the two steel arch frames are brought close to each other and then the docking plates on the two steel arch frames are plugged in until the edges of the two steel arch frames are abutted; and when the edges of the two steel arch frames are abutted, the steel rope is in a zigzag state between the two steel arch frames, and after the two ends of the steel rope in the zigzag state are fixed, the two steel arch frames tend to get closer.

[0007] Optionally, the number and length of the steel segments of the two steel arches are different, so that the connection positions of two adjacent steel segments of the two steel arches are staggered in the circumferential direction of the steel arches.

[0008] Optionally, in the circumferential direction of the steel arch, the connection position of the two steel segments of one steel arch is located at the middle position of the corresponding steel segment of the other steel arch.

[0009] Optionally, a connecting structure is provided on each base, the connecting structure comprising a transmission rod and two hinge blocks, the transmission rod extends axially along the tunnel and is rotatably mounted on the base, the two hinge blocks are sequentially distributed along the axial direction of the transmission rod and are slidably mounted on the base; the two hinge blocks are respectively threadedly matched with the transmission rod, and the thread rotation directions of the two hinge blocks and the matching parts of the transmission rod are opposite; the ends on the same side of the two steel arch frames are respectively hinged to the two hinge blocks of the same set of connecting structures.

[0010] Optionally, two groups of connection structures are provided, and the two groups of connection structures are arranged in sequence along the distribution direction of the two bases. One end of the same steel arch is located between the two connection structures and is hinged to one hinge block of the two connection structures respectively.

[0011] Optionally, two adjacent steel sections of the same steel arch are connected by a bolt assembly.

[0012] Optionally, in the multiple steel sections of the same steel arch frame, the two ends of the middle steel section are respectively provided with fixed ear plates, connecting holes are opened on the fixed ear plates, the fixed ear plates of two adjacent steel sections are fitted together and connected by the bolt assembly; one end of the two steel sections located at the edge is provided with the fixed ear plate, and the other end is provided with a hinge rod for hinged connection with the hinge block.

[0013] Optionally, each steel arch frame has two docking plates on the side. When two steel arch frames are docked, the two docking plates of one steel arch frame are located between the two docking plates of the other steel arch frame, and each docking plate of one steel arch frame is in contact with the docking plate of the other adjacent steel arch frame.

[0014] Optionally, each steel section of the steel arch frame is an I-beam, and the two butt joint plates are located between the upper wing plate and the lower wing plate of the I-beam and fixed to the waist plate of the I-beam.

[0015] Optionally, the threading ear plate is arranged between two butt joint plates of the steel arch frame and fixed to the waist plate of the I-beam.

[0016] The beneficial effects of the present invention are as follows: the steel arch frame of the adjustable subway construction tunnel support device of the present invention is composed of multiple steel sections, which is convenient for transportation and installation. After the steel arch frames are spliced, steel ropes are used to drive the two steel arch frames to stand upright to support the tunnel. The operator only needs to stretch the two ends of the steel rope on the ground respectively. The operation is simple, and the steel arch frame will not tilt further excessively after standing upright due to excessive tension, so the safety is high.

[0017] Furthermore, after the edges of the two steel arches are abutted, the steel rope in a zigzag state causes the two steel arches to have a tendency to move closer together. After the two ends of the steel rope are fixed, the steel rope can also serve as a connecting piece to connect the two steel arches.

[0018] Furthermore, the two steel arch frames are connected by a docking plate to prevent one of the steel arch frames from tilting to one side, thereby improving the stability of the connection between the two steel arch frames.

[0019] Furthermore, the number and length of the steel segments of the two steel arches are different, so that the connection positions of the two adjacent steel segments of the two steel arches are staggered in the circumferential direction of the steel arches, thereby preventing the steel arches from having loose connection positions of the two adjacent steel segments, which affects the overall support strength of the steel arches. The number and length of the steel segments of each steel arch can be adjusted as needed to adapt to the use of different sizes and application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 This is a schematic diagram of an embodiment of an adjustable subway construction tunnel support device of the present invention installed in a tunnel;

[0022] Figure 2 It is a schematic diagram of the overall structure of an embodiment of an adjustable subway construction tunnel support device of the present invention;

[0023] Figure 3 It is a structural schematic diagram of one of the steel sections in an embodiment of an adjustable subway construction tunnel support device of the present invention;

[0024] Figure 4 It is a schematic diagram of a base and a connection structure in an embodiment of an adjustable subway construction tunnel support device of the present invention;

[0025] Figure 5 It is a cross-sectional schematic diagram of two steel arch frames butted against each other in an embodiment of an adjustable subway construction tunnel support device of the present invention;

[0026] Figure 6 It is a schematic diagram of an embodiment of an adjustable subway construction tunnel support device of the present invention in an initial state;

[0027] Figure 7 It is a schematic diagram of a state in which two steel arch frames are pulled up by steel ropes in an embodiment of an adjustable subway construction tunnel support device of the present invention;

[0028] Figure 8 It is a schematic diagram of two steel arch frames being pulled to an upright state in an embodiment of an adjustable subway construction tunnel support device of the present invention.

[0029] In the figure: 100, steel arch frame; 101, first arch frame; 102, second arch frame; 110, steel section; 120, docking plate; 130, threading ear plate; 140, fixing ear plate; 150, hinged rod; 160, bolt assembly; 200, base; 210, transmission rod; 220, hinged block; 300, steel rope. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] An embodiment of an adjustable subway construction tunnel support device of the present invention is used to support the top of the tunnel, such as Figures 1 to 8 As shown, it includes a steel rope 300 , two steel arch frames 100 and two bases 200 .

[0032] The two bases 200 are distributed in sequence along a horizontal direction perpendicular to the axial direction of the tunnel, and are respectively fixed on the ground at both sides close to the side walls of the tunnel.

[0033] The two steel arches 100 are distributed in sequence along the axial direction of the tunnel, and are both composed of multiple arc-shaped steel segments 110. The two adjacent steel segments 110 of each steel arch 100 are fixedly connected to form an arc-shaped structure coaxial with the top of the tunnel. The side of each steel arch 100 is provided with an arc-shaped docking plate 120 coaxial with the steel arch 100; the side of the two steel arches 100 is provided with a plurality of threading lug plates 130, each steel segment 110 has at least one threading lug plate 130, and the threading lug plates 130 on the two steel arches 100 are staggered in the circumferential direction of the steel arch 100. In the initial state, the two steel arches 100 are both supported on the ground, and the tops of the arc-shaped structures of the two steel arches 100 are respectively located on both sides of the line connecting the two bases 200; the steel ropes 300 alternately pass through the threading lug plates 130 of the two steel arches 100. When in use, firstly, the two ends of each steel arch frame 100 are respectively rotated around a horizontal axis perpendicular to the axial direction of the tunnel and installed on the two bases 200, and the steel arch frame 100 can move along the axial direction of the tunnel relative to the base 200; then, the two steel arch frames 100 are caused to rotate around the hinge axis between them and the base 200 by straightening the steel rope 300, so that the two steel arch frames 100 are rotated to be coaxial with the top of the tunnel; thereafter, while straightening the steel rope 300, the two steel arch frames 100 are brought close to each other so that the docking plates 120 on the two steel arch frames 100 are plugged in until the edges of the two steel arch frames 100 are abutted; and when the edges of the two steel arch frames 100 are abutted, the steel rope 300 is in a zigzag state between the two steel arch frames 100, and after the two ends of the steel rope 300 in the zigzag state are fixed, the two steel arch frames 100 tend to get closer. Specifically, the holes on the threading lugs 130 of the two steel arches 100 through which the steel ropes 300 pass are not on the same arc line, so that when the edges of the two steel arches 100 abut, the steel ropes 300 are in a zigzag state under the restriction of the threading lugs 130 of the two steel arches 100. Among them, by adjusting the initial spacing between the two steel arches 100, when the two steel arches 100 rotate to be coaxial with the tunnel top, the docking plates 120 of the two steel arches 100 are just about to enter the plug-in state, which prevents the two steel arches 100 from further rotating and approaching.

[0034] The steel arch frame 100 is composed of a plurality of steel sections 110, which is convenient for transportation and installation. After the steel arch frames 100 are spliced, the steel rope 300 is used to drive the two steel arch frames 100 to stand up to support the tunnel. The operator only needs to stretch the two ends of the steel rope 300 on the ground. The operation is simple, and the steel arch frame 100 will not tilt excessively after standing up due to excessive tension, so it is highly safe. After the edges of the two steel arch frames 100 are abutted, the steel rope 300 in a zigzag state makes the two steel arch frames 100 tend to get closer. After the two ends of the steel rope 300 are fixed, the steel rope 300 can also be used as a connecting piece to connect the two steel arch frames 100. Furthermore, the two steel arch frames 100 are plugged in through the docking plate 120 to prevent one of the steel arch frames 100 from tilting to one side, thereby improving the stability of the connection between the two steel arch frames 100.

[0035] In this embodiment, the number and length of the steel segments 110 of the two steel arch frames 100 are different, so that the connection positions of the two adjacent steel segments 110 of the two steel arch frames 100 are staggered in the circumferential direction of the steel arch frames 100, so as to avoid the steel arch frames 100 being affected by the loose connection positions of the two adjacent steel segments 110. Preferably, in the circumferential direction of the steel arch frames 100, the connection position of the two steel segments 110 of one steel arch frame 100 is located in the middle position of the corresponding steel segment 110 of the other steel arch frame 100. Specifically, the two steel arch frames 100 are respectively connected to the first arch frame 101 and the second arch frame 102. The first arch frame 101 has three steel segments 110, and the length ratio of the first arch frame 101 in the circumferential direction is 2:2:2. The second arch frame 102 has four steel segments 110, and the length ratio of the four steel segments 110 in the circumferential direction is 1:2:2:1. This configuration allows the connection positions of every two adjacent steel segments 110 of the two steel arch frames 100 to be evenly and alternately distributed in the circumferential direction of the steel arch frames 100, thereby improving the overall supporting strength of the two steel arch frames 100.

[0036] In this embodiment, a connection structure is provided on each base 200, and the connection structure includes a transmission rod 210 and two hinge blocks 220; the transmission rod 210 extends along the axial direction of the tunnel and is rotatably mounted on the base 200, and the two hinge blocks 220 are sequentially distributed along the axial direction of the transmission rod 210 and are slidably mounted on the base 200; the two hinge blocks 220 are respectively threadedly matched with the transmission rod 210, and the thread rotation directions of the two hinge blocks 220 and the matching parts of the transmission rod 210 are opposite; the ends of the same side of the two steel arches 100 are respectively hinged to the two hinge blocks 220 of the same group of connection structures. Preferably, two groups of connection structures are provided, and the two groups of connection structures are sequentially arranged along the distribution direction of the two bases 200, and one end of the same steel arch 100 is located between the two connection structures and is respectively hinged to one hinge block 220 of the two connection structures.

[0037] In this embodiment, two adjacent steel segments 110 of the same steel arch frame 100 are connected by a bolt assembly 160. Specifically, among the multiple steel segments 110 of the same steel arch frame 100, the two ends of the steel segment 110 located in the middle are respectively provided with fixing ear plates 140, and the fixing ear plates 140 are provided with connection holes, and the fixing ear plates 140 of the two adjacent steel segments 110 are fitted together and connected by the bolt assembly 160; one end of the two steel segments 110 located at the edge is provided with the fixing ear plate 140, and the other end is provided with a hinge rod 150 for hinged connection with the hinge block 220.

[0038] In this embodiment, there are two butt joint plates 120 on the side of each steel arch frame 100. When two steel arch frames 100 are butt jointed, the two butt joint plates 120 of one steel arch frame 100 are located between the two butt joint plates 120 of the other steel arch frame 100, and each butt joint plate 120 of one steel arch frame 100 is in contact with the butt joint plate 120 of the other adjacent steel arch frame 100. Specifically, each steel section 110 of the steel arch frame 100 is an I-beam, and the two butt joint plates 120 are located between the upper wing plate and the lower wing plate of the I-beam and fixed to the waist plate of the I-beam. Among them, the threading ear plate 130 is arranged between the two butt joint plates 120 of the steel arch frame 100 and fixed to the waist plate of the I-beam.

[0039] When using the adjustable subway construction tunnel support device of the present invention, first fix two bases 200 to the ground, then assemble two steel arch frames 100 into an arc structure, and place the assembled two steel arch frames 100 on both sides of the line connecting the two bases 200, with the ends of the two steel arch frames 100 close to each other and the tops away from each other. Then, the hinge rods 150 at the ends of the two steel arch frames 100 are rotated to the hinge blocks 220 installed on the two bases 200, and the spacing between the two hinge blocks 220 of the same transmission structure is adjusted, thereby adjusting the initial spacing between the two steel arch frames 100. Then, the steel rope 300 is alternately passed through the threading lugs 130 on the two steel arches 100. The two ends of the steel rope 300 are respectively located on both sides of the circumferential direction of the steel arches 100. The steel rope 300 is pulled in opposite directions, so that the two steel arches 100 can be synchronously erected under the drive of the steel rope 300. When the two steel arches 100 rotate to be coaxial with the top of the tunnel, the docking plates 120 of the two steel arches 100 are just about to enter the plug-in state, which prevents the two steel arches 100 from further rotating and approaching. After that, while continuing to straighten the steel rope 300, the transmission rod 210 is rotated so that the two hinge blocks 220 drive the two steel arches 100 to approach each other, and then the docking plates 120 on the two steel arches 100 are plugged until the upper wing plate and the lower wing plate of the I-beam of the two steel arches 100 are in contact. At this time, the steel rope 300 is in a zigzag state between the two steel arches 100, and the two ends of the steel rope 300 in the zigzag state are fixed, so that the two steel arches 100 tend to be closer. Then, the two ends of the steel rope 300 are fixed to the two bases 200 respectively, and then cement is poured at the ends of the two bases 200 and the two steel arches 100, so as to fix the positions of the two steel arches 100. In some other embodiments, the two steel arches 100 can be further connected by a bolt structure.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An adjustable subway construction tunnel support device for supporting the top of the tunnel, characterized in that: It includes steel ropes, two steel arches and two bases; The two bases are distributed in sequence along a horizontal direction perpendicular to the tunnel axis and are respectively fixed on the ground on both sides close to the tunnel side wall; The two steel arch frames are distributed in sequence along the axial direction of the tunnel, and are both composed of multiple arc-shaped steel segments. The two adjacent steel segments of each steel arch frame are fixedly connected to form an arc-shaped structure coaxial with the top of the tunnel; the side of each steel arch frame is provided with an arc-shaped docking plate coaxial with the steel arch frame; the side of the two steel arch frames are provided with multiple threading ear plates, each steel segment has at least one threading ear plate, and the threading ear plates on the two steel arch frames are staggered in the circumferential direction of the steel arch frames; in the initial state, the two steel arch frames are both supported on the ground, and the tops of the arc-shaped structures of the two steel arch frames are respectively located on both sides of the line connecting the two bases; when in use, the two ends of each steel arch frame are respectively surrounded by a vertical The horizontal axis perpendicular to the tunnel axis is rotatably installed on the two bases, and the steel arch frames can move relative to the bases along the axial direction of the tunnel; the steel ropes are alternately passed through the threading ear plates of the two steel arch frames, and then the two steel arch frames are caused to rotate around the hinge axis between them and the base by straightening the steel ropes, so that the two steel arch frames are rotated to be coaxial with the tunnel top; thereafter, while straightening the steel ropes, the two steel arch frames are brought close to each other and then the docking plates on the two steel arch frames are plugged in until the edges of the two steel arch frames are abutted; and when the edges of the two steel arch frames are abutted, the steel rope is in a zigzag state between the two steel arch frames, and after the two ends of the steel rope in the zigzag state are fixed, the two steel arch frames tend to get closer.

2. The adjustable subway construction tunnel support device according to claim 1, characterized in that: The number and length of the steel segments of the two steel arch frames are different, so that the connection positions of two adjacent steel segments of the two steel arch frames are staggered in the circumferential direction of the steel arch frames.

3. The adjustable subway construction tunnel support device according to claim 2, characterized in that: In the circumferential direction of the steel arch frame, the connection position of the two steel segments of one steel arch frame is located at the middle position of the corresponding steel segment of the other steel arch frame.

4. The adjustable subway construction tunnel support device according to claim 1, characterized in that: A connecting structure is provided on each base, and the connecting structure includes a transmission rod and two hinge blocks. The transmission rod extends along the axial direction of the tunnel and is rotatably installed on the base. The two hinge blocks are distributed in sequence along the axial direction of the transmission rod and are slidably installed on the base. The two hinge blocks are respectively matched with the transmission rod threads, and the thread rotation directions of the two hinge blocks and the matching parts of the transmission rod are opposite. The ends of the same side of the two steel arch frames are respectively hinged to the two hinge blocks of the same group of connecting structures.

5. The adjustable subway construction tunnel support device according to claim 3, characterized in that: Two groups of connection structures are provided, and the two groups of connection structures are arranged in sequence along the distribution direction of the two bases. One end of the same steel arch is located between the two connection structures and is respectively hinged to one hinge block of the two connection structures.

6. The adjustable subway construction tunnel support device according to claim 5, characterized in that: Two adjacent steel sections of the same steel arch are connected by a bolt assembly.

7. The adjustable subway construction tunnel support device according to claim 6, characterized in that: Among the multiple steel sections of the same steel arch frame, the two ends of the steel section located in the middle are respectively provided with fixed ear plates, and connecting holes are opened on the fixed ear plates. The fixed ear plates of two adjacent steel sections are fitted together and connected by the bolt assembly; one end of the two steel sections located at the edge is provided with the fixed ear plate, and the other end is provided with a hinge rod for hinged connection with the hinge block.

8. The adjustable subway construction tunnel support device according to claim 1, characterized in that: There are two butt joint plates on the side of each steel arch frame. When two steel arch frames are butt jointed, the two butt joint plates of one steel arch frame are located between the two butt joint plates of the other steel arch frame, and each butt joint plate of one steel arch frame fits with the butt joint plate of the other adjacent steel arch frame.

9. The adjustable subway construction tunnel support device according to claim 8, characterized in that: Each steel section of the steel arch frame is an I-beam, and two butt plates are located between an upper wing plate and a lower wing plate of the I-beam and are fixed to a waist plate of the I-beam.

10. The adjustable subway construction tunnel support device according to claim 9, characterized in that: The threading ear plate is arranged between two butt joint plates of the steel arch frame and is fixed to the waist plate of the I-beam.

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