Tunnel folding type lagging jack and using method

Abstract

The invention discloses a tunnel folding type lagging jack and a using method, and relates to the technical field of underground engineering, the tunnel folding type lagging jack comprises a lagging jack I, a lagging jack II, a spacing control screw rod and a spacing adjusting handle, the spacing adjusting handle is connected with a plurality of round holes formed in the top end of the lagging jack II, and the round holes are evenly distributed in the lagging jack II and the lagging jack I; and a plurality of spacing adjusting screw rods are connected between the arch frame I and the arch frame II. According to the tunnel folding type arch frame of the structure, the uniformity of the arch frame distance and the construction safety can be achieved, the supporting effect of a whole primary supporting structure is guaranteed, meanwhile, the supporting strength between the arch frames is improved through the distance adjusting screw rods, and the tunnel folding type arch frame has important significance for improving the arch frame construction safety and guaranteeing the construction quality.

Description

Technical Field

[0001] The invention relates to the technical field of underground engineering, and in particular to a tunnel folding arch frame and a use method thereof. Background Art

[0002] At present, most tunnel construction adopts the drilling and blasting method. The traditional tunnel initial support structure construction usually adopts the manual installation of arch frames. The arch frame spacing is difficult to control. The difference in arch frame spacing affects the overall strength of the initial support structure, and there are safety hazards in construction, especially in the construction of soft surrounding rock tunnels. The stability of the surrounding rock is extremely poor. Construction workers are working on the open surface of the surrounding rock, which is prone to safety accidents and endangers the lives of construction workers. Therefore, in order to solve the problem of safe construction in soft surrounding rocks, a tunnel folding arch frame structure was invented. Summary of the invention

[0003] The purpose of the present invention is to provide a tunnel folding arch frame and a method of use, so as to solve the problems in the prior art that the arch frame spacing is difficult to control, the overall strength of the structure is low, and there are construction safety risks.

[0004] To achieve the above-mentioned purpose, the present invention provides a tunnel folding arch frame, comprising an arch frame I, an arch frame II, a spacing control screw and a spacing adjustment handle, wherein the spacing adjustment handle is connected to a circular hole arranged at the top of the arch frame II, and a plurality of the circular holes are arranged, and the plurality of the circular holes are evenly distributed on the arch frame II and the arch frame I, and a plurality of the spacing adjustment screws are connected between the arch frame I and the arch frame II.

[0005] Preferably, a limiting ring is fixedly provided at the end of the spacing adjustment screw, and the limiting ring is connected to the arch frame I through the circular hole. The spacing adjustment screw is provided with an external thread, and the external thread is adapted to the internal thread inside the limiting structure sleeve. One end of the limiting structure sleeve is connected to the arch frame II through a limiting ring II, and the other end of the limiting structure sleeve is connected to the double-layer gear plate.

[0006] Preferably, a limiting block is arranged inside the double-layer gear plate, and the limiting block is matched with the guide groove arranged on the limiting structure sleeve. A chain is arranged on the double-layer gear plate, and there are multiple chains. The double-layer gear plate arranged at the end of the arch frame II is connected to a single chain, and the chain arranged at the top of the arch frame II is connected to the three-layer gear plate.

[0007] Preferably, one end of the three-layer gear disk is connected to the handle limit rod through a bearing, the handle limit rod is connected to the round hole through the bearing, the other end of the three-layer gear disk is connected to the rotating handle, the rotating handle is connected to the handle glove tube, and the side end of the three-layer gear disk is connected to the spacing recording device.

[0008] Preferably, the spacing recording device is provided with a matching card slot, and the matching card slot is connected to the arch frame II; The spacing recording device includes a decimeter recording disk, a centimeter recording disk and a gear I, wherein the gear I is connected to the centimeter recording disk, the gear I is connected to the chain driving gear of the three-layer gear disk, the gear I and the gear II are coaxially arranged, the gear II drives the gear III, and the gear III is connected to the decimeter recording disk.

[0009] Preferably, the circumference of the gear II is 1 / 10 of the circumference of the gear III.

[0010] A method for using a tunnel folding arch frame comprises the following steps: Step 1: Assemble, install the spacing control screws on arch frame I and arch frame II, and install the double-layer gear plate, chain and spacing adjustment handle on arch frame II; Step 2: Install, fix arch frame II on the installed arch frame, turn the spacing adjustment handle, adjust the elongation length of the spacing control screw, and ensure the uniformity of the arch frame spacing; Step 3, dismantling, after the screw pitch adjustment is completed, dismantle the double-layer gear plate, the triple-layer gear plate, the chain, the pitch adjustment handle and the pitch recording device components for reuse.

[0011] Therefore, the present invention adopts a tunnel folding arch frame and a method of using the above structure, which has the following beneficial effects: (1) The folding arch frame of the present invention has controllable spacing and reasonable force, which can solve the problem of safe construction of the initial support structure of the soft surrounding rock tunnel, while ensuring the uniformity of the structural strength and the consistency of the strength of the entire tunnel treatment structure.

[0012] (2) The adjustment process of the foldable arch frame of the present invention only requires one person, and the adjustment is convenient. By turning the handle, all the rods are driven to push the arch frame forward. The change of the arch frame spacing can be observed in real time through the spacing recording device. The rotation direction of the handle and the final adjustment result can be determined by observing the position of the pointer on the distance device.

[0013] (3) The folding arch frame of the present invention is operated on the side of the initial support that has been completed, which ensures the safety of construction, ensures the strength of the initial support structure and uniform force, prevents local deformation and damage due to uneven force, and increases unnecessary construction costs; the steel mesh is arranged on one side of the arch frame adjusting screw to increase the support strength of the area between the arch frames and ensure construction safety.

[0014] (4) The installation and disassembly process of the foldable arch frame of the present invention is quick and convenient, and most of the arch frame adjustment structure materials can be reused, which reduces material costs and has a wide range of applications.

[0015] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the folding arch frame of the tunnel of the present invention; Figure 2 This is a disassembled diagram of the arch spacing adjustment structure of the present invention; Figure 3 This is an exploded view of the arch spacing adjustment position structure of the present invention; Figure 4 This is a structural diagram of the arch spacing adjustment position of the present invention; Figure 5 This is a three-layer gear structure diagram of the present invention; Figure 6 This is a diagram of a spacing recording device of the present invention; Figure 7 It is a cross-sectional view of the spacing recording device of the present invention; Reference numerals 1. Arch frame I; 2. Arch frame II; 3. Spacing control screw; 4. Double-layer gear plate; 5. Chain; 6. Spacing adjustment handle; 7. Round hole; 8. Limiting structure sleeve; 9. Limiting ring; 10. Limiting ring II; 11. Guide groove; 12. Internal thread; 13. Limit block; 14. External thread; 15. Bearing; 16. Handle limit rod; 17. Three-layer gear plate; 18. Turning handle; 19. Handle sleeve; 20. Spacing recording device; 21. Intermediate gear; 22. Chain drive gear; 23. Decimeter recording disk; 24. Centimeter recording disk; 25. Matching slot; 26. Gear I; 27. Gear II; 28. Gear III. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0018] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] Example See also Figure 1-7 The present invention provides a tunnel folding arch frame, including an arch frame Ⅰ1, an arch frame Ⅱ2, a spacing control screw 3 and a spacing adjustment handle 6. The spacing adjustment handle 6 is connected to a circular hole 7 arranged at the top of the arch frame Ⅱ2. There are multiple circular holes 7. The circular holes 7 are used to install the spacing control screw 3 and the screw rotating internal threaded sleeve, so as to achieve the adjustable arch frame spacing. The multiple circular holes 7 are evenly distributed on the arch frame Ⅱ2 and the arch frame Ⅰ1, and multiple spacing adjustment screws 3 are connected between the arch frame Ⅰ1 and the arch frame Ⅱ2.

[0020] A limiting ring 9 is fixedly provided at the end of the spacing adjustment screw 3, and the limiting ring 9 is connected to the circular hole 7 on the arch frame Ⅰ1. The spacing adjustment screw 3 is provided with an external thread 14, and the external thread 14 is matched with the internal thread 12 inside the limiting structure sleeve 8. One end of the limiting structure sleeve 8 is connected to the circular hole 7 on the arch frame Ⅱ2 through the limiting ring 2 10, and the other end of the limiting structure sleeve 8 is connected to the double-layer gear plate 4. A limiting block 13 is provided inside the double-layer gear plate 4, and the limiting block 13 is matched with the guide groove 11 provided on the limiting structure sleeve 8, so that the spacing of the arch frames can be adjusted after the spacing control screw 3 is rotated. The setting of the limiting block 13 and the guide groove 11 ensures the stability of the connection, and the spacing adjustment screw 3 passes through the limiting structure sleeve 8 and the double-layer gear plate 4.

[0021] The double-layer gear plate 4 is an integral structure, in which the positions of the teeth correspond to each other. A chain 5 is arranged on the double-layer gear plate 4, and there are multiple chains 5. The double-layer gear plate 4 arranged at the end of the arch frame Ⅱ2 is connected to a single chain 5, and the upper end of the chain 5 arranged at the top of the arch frame Ⅱ2 is connected to the three-layer gear plate 17.

[0022] One end of the three-layer gear disc 17 is connected to the handle limit rod 16 through the bearing 15, and the handle limit rod 16 is connected to the round hole 7 through the bearing 15 and installed on the arch frame II 2. The other end of the three-layer gear disc 17 is connected to the rotating handle 18, and the rotating handle 18 is connected to the handle grommet 19. By rotating the spacing adjustment handle 6, the three-layer gear disc 17 and the chain 5 are driven, so that the double-layer gear discs 4 at other positions are rotated, so that the arch frame spacing is changed. The side end of the three-layer gear plate 17 is connected to the spacing recording device 20, and a matching slot 25 is provided on the spacing recording device 20, which is connected to the arch frame II2 through the matching slot 25; the arch frame I1 and the arch frame II2 are both set as I-shaped structures, and the spacing recording device 20 is installed on the side end of the arch frame II2.

[0023] The spacing recording device 20 includes a decimeter recording disk 23, a centimeter recording disk 24, a gear I 26, a gear II 27 and a gear III 28. The intermediate gear 21 of the three-layer gear disk 17 is driven to rotate by rotating the spacing adjustment handle 6, and the chain drive gear 22 drives the intermediate gear 21 to rotate. Each time the intermediate gear 21 of the three-layer gear disk 17 rotates one circle, the gear I 26 on the spacing recording device 20 will be driven to rotate once, thereby driving the pointer of the centimeter recording disk 24 to rotate and indicate the value. The gear I 26 and the gear II 27 of the spacing recording device 20 are coaxially arranged, and the gear II 27 rotates to drive the spacing recording gear III 28 to rotate, thereby causing the pointer of the decimeter recording disk 23 to rotate and indicate the value. The sum of the values ​​of the decimeter recording disk 23 and the centimeter recording disk 24 is the spacing adjusted by the arch frame; the circumference of the gear II 27 is 1 / 10 of the circumference of the gear III 28.

[0024] A method for using a tunnel folding arch frame comprises the following steps: Step 1: Before tunnel construction, assemble the arch frame I1, arch frame II2, spacing control screw 3, double-layer gear plate 4, chain 5, double-layer gear plate 4 and spacing adjustment handle 6 outside the tunnel in advance. Connect one end of the spacing adjustment screw 3 to the limiting ring 9 and install it on the circular hole 7 of the arch frame I1. The spacing adjustment screw 3 passes through the limiting ring II 10, the limiting structure sleeve 8 and the double-layer gear plate 4 in sequence, and is fixed to the circular hole 7 on the arch frame II2 through the limiting ring II 10. Install the spacing adjustment handle 6 and the spacing recording device 20 on the circular hole 7 at the top of the arch frame II2, and install the chain 5 on the double-layer gear plate 4 and the three-layer gear plate 17.

[0025] Step 2: After the tunnel is completed, fix the arch frame II2 to the installed arch frame by connecting the annular bolts of the arch frame II2, and drive the three-layer gear plate 17 and the chain 5 by rotating the spacing adjustment handle 6, so that the double-layer gear plates 4 at other positions rotate, thereby adjusting the elongation length of the spacing control screw 3, and read the arch frame spacing value through the spacing recording device 20 to determine the number of rotations of the spacing adjustment handle 6.

[0026] Step 3: When the spacing between the arches reaches the designed width, the double-layer gear plate 4, the chain 5, the triple-layer gear plate 17, the spacing adjustment handle 6 and the spacing recording device 20 can be removed and recycled to avoid unnecessary waste of materials and save construction costs.

[0027] Therefore, the present invention adopts a tunnel folding arch frame and a method of use of the above-mentioned structure. The spacing of the folding arch frame of the present invention is controllable and the force is reasonable, which can solve the problem of safe construction of the initial support structure of the soft surrounding rock tunnel, and at the same time ensure the uniformity of the structural strength and the consistency of the strength of the entire tunnel treatment structure; the adjustment process of the folding arch frame of the present invention only requires one person, and the adjustment is convenient. By turning the handle to drive all the rods, the arch frame is pushed forward, and the change of the arch frame spacing can be observed in real time through the spacing recording device, and the rotation direction of the handle and the final adjustment result are determined by observing the pointer position on the distance device; the folding arch frame of the present invention is operated on the side of the initial support where the construction has been completed, so as to ensure the safety of the construction, ensure the strength and uniform force of the initial support structure, prevent local deformation and damage caused by uneven force, and increase unnecessary construction costs; the steel mesh is arranged on one side of the arch frame adjusting screw, which can increase the support strength of the area between the arch frames and ensure construction safety; the installation and disassembly process of the folding arch frame of the present invention is fast and convenient, and most of the arch frame adjustment structure materials can be reused, which reduces the material cost and has a wide range of applications.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A tunnel folding arch frame, characterized in that: It includes an arch frame I, an arch frame II, a spacing control screw and a spacing adjustment handle. The spacing adjustment handle is connected to a circular hole arranged at the top of the arch frame II. There are multiple circular holes, and the multiple circular holes are evenly distributed on the arch frame II and the arch frame I. Multiple spacing adjustment screws are connected between the arch frame I and the arch frame II.

2. The tunnel folding arch according to claim 1, characterized in that: A limiting ring is fixedly provided at the end of the spacing adjustment screw, and the limiting ring is connected to the arch frame I through the circular hole. The spacing adjustment screw is provided with an external thread, and the external thread is adapted to the internal thread inside the limiting structure sleeve. One end of the limiting structure sleeve is connected to the arch frame II through a limiting ring II, and the other end of the limiting structure sleeve is connected to the double-layer gear plate.

3. The tunnel folding arch according to claim 2, characterized in that: A limiting block is arranged inside the double-layer gear plate, and the limiting block is matched with the guide groove arranged on the limiting structure sleeve. A chain is arranged on the double-layer gear plate, and there are multiple chains. The double-layer gear plate arranged at the end of the arch frame II is connected to a single chain, and the chain arranged at the top of the arch frame II is connected to the triple-layer gear plate.

4. The tunnel folding arch according to claim 3, characterized in that: One end of the three-layer gear disc is connected to the handle limit rod through a bearing, and the handle limit rod is connected to the round hole through the bearing. The other end of the three-layer gear disc is connected to the rotating handle, and the rotating handle is connected to the handle glove tube. The side end of the three-layer gear disc is connected to the spacing recording device.

5. The tunnel folding arch according to claim 4, characterized in that: The spacing recording device is provided with a matching card slot, and the matching card slot is connected to the arch frame II; The spacing recording device includes a decimeter recording disk, a centimeter recording disk and a gear I, wherein the gear I is connected to the centimeter recording disk, the gear I is connected to the chain driving gear of the three-layer gear disk, the gear I and the gear II are coaxially arranged, the gear II drives the gear III, and the gear III is connected to the decimeter recording disk.

6. The tunnel folding arch according to claim 5, characterized in that: The circumference of the gear II is 1 / 10 of the circumference of the gear III.

7. A method for using a tunnel folding arch frame according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: Assemble, install the spacing control screws on arch frame I and arch frame II, and install the double-layer gear plate, chain and spacing adjustment handle on arch frame II; Step 2: Install, fix arch frame II on the installed arch frame, turn the spacing adjustment handle, adjust the elongation length of the spacing control screw, and ensure the uniformity of the arch frame spacing; Step 3, dismantling, after the screw pitch adjustment is completed, dismantle the double-layer gear plate, the triple-layer gear plate, the chain, the pitch adjustment handle and the pitch recording device components for reuse.

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