Arch support construction device for highway soft rock tunnel

Abstract

The invention provides a highway soft rock tunnel arch support construction device, and belongs to the technical field of tunnel support arches, the highway soft rock tunnel arch support construction device comprises an outer arch, three sliding sleeves are uniformly and fixedly connected to the inner side wall of the outer arch, spline shafts are slidably connected to the interiors of the three sliding sleeves, and moving plates are fixedly connected to the ends of the spline shafts; an inner arch frame is arranged in the outer arch frame, a supporting frame is fixedly connected into the inner arch frame, two fixing bases are symmetrically and fixedly connected to the upper end face of the supporting frame, and a two-way screw is rotationally connected between the two fixing bases. Through the arrangement of the sliding sleeve, the spline shaft, the moving plate, the two-way screw rod, the moving block, the adjusting rod, the connecting cylinder, the first spring and the sliding plate, the moving plate is elastically supported, so that the top plate can be tightly attached to the rock wall of the tunnel guide, and the supporting stability and effect are improved; the problem that in the prior art, the supporting effect is poor due to the fact that the attaching performance of an outer arch frame and a tunnel rock wall is poor is solved.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel support arches, and in particular to a highway soft rock tunnel arch support construction device. Background Art

[0002] The excavation and support of soft rock tunnels is a process in which the surrounding rock and underground structure interact to reach a state of equilibrium. The interaction process is quite complex, especially for large-section highway soft rock tunnels. The stress redistribution of the surrounding rock and the large deformation of the tunnel section are a discontinuous nonlinear mechanical process. After the tunnel is excavated, support and reinforcement construction must be carried out quickly.

[0003] After searching, in the prior art, a Chinese patent with patent application number CN201821156117.9 discloses a double-layer arch support construction device for a highway soft rock tunnel, including a positioning rod, both ends of which are movably sleeved with an outer supporting steel arch, both sides of the outer supporting steel arch are fixedly connected with a fixing rod, and one end of the fixing rod away from the outer supporting steel arch is fixedly connected with an inner supporting steel arch. The double-layer arch support construction device for a highway soft rock tunnel horizontally supports the outer supporting steel arch and the inner supporting steel arch from both sides through the positioning rod, obliquely supports the outer supporting steel arch and the inner supporting steel arch from both sides through the support shaft, and longitudinally supports the bottom of the supporting steel arch through the support rod, and supports the tunnel with the outer supporting steel arch and the inner supporting steel arch at the same time, so that the arch support is stable, and the outer supporting steel arch and the inner supporting steel arch are not easy to twist and deform at the same time, so that the construction quality and safety of the tunnel are guaranteed, but the following defects still exist: (1) The outer arch frame in the support device in the prior art cannot abut against the tunnel rock wall, resulting in poor support effect. At the same time, when the outer arch frame support reinforcement through the support shaft in the prior art is subjected to external force, the stability of the support becomes poor; (2) The supporting device in the prior art improves the supporting effect by welding the fixing rods and the supporting shaft, which results in relatively low installation efficiency.

[0004] Therefore, we made improvements on this and proposed a highway soft rock tunnel arch support construction device. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the existing outer arch frame is inconvenient to fit well to the tunnel rock wall, resulting in poor supporting effect and inconvenient installation.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions: Highway soft rock tunnel arch support construction device is used to improve the above problems.

[0007] The present invention is specifically as follows: It includes an outer arch frame, three sliding sleeves are evenly fixedly connected on the inner side wall of the outer arch frame, spline shafts are slidably connected in the three sliding sleeves, and movable plates are fixedly connected to the ends of the spline shafts. An inner arch frame is arranged in the outer arch frame, and a support frame is fixedly connected in the inner arch frame. The upper end surface of the support frame is symmetrical and fixedly connected with two fixed seats, a bidirectional screw is rotatably connected between the two fixed seats, and a driving structure for driving the bidirectional screw to rotate is arranged on the support frame, and two moving blocks are symmetrically and threadedly connected on the bidirectional screw, and the two moving blocks are Three first connecting blocks are fixedly connected, and the first connecting blocks are rotatably connected to adjusting rods, and the top ends of the adjusting rods are rotatably connected to second connecting blocks, and the top ends of adjacent second connecting blocks are commonly fixedly connected to a top plate, a connecting tube is fixed at the center of the upper end surface of the top plate, and a bottom plate is fixedly connected in the connecting tube, and the upper end surface of the bottom plate is fixedly connected to a first spring, and the top end of the first spring is fixedly connected to a slide plate, and the slide plate is slidably connected to the connecting tube, and two supporting structures are symmetrically provided on the top plate, and reinforcement structures are provided at both ends of the inner arch.

[0008] As a preferred technical solution of the present invention, the driving structure includes a worm wheel fixed at the center of the bidirectional screw, a rotating rod is rotatably connected to the support frame, the top end of the rotating rod is fixedly connected to a worm meshing with the worm wheel, and the bottom end of the rotating rod is fixedly connected to a handwheel.

[0009] As a preferred technical solution of the present invention, the support structure includes two mounting seats that are symmetrical and fixed on the upper end surface of the top plate, and an arc-shaped plate is slidably connected inside the mounting seats. A group of second springs are evenly and fixedly connected to the bottom ends of the arc-shaped plates, and the inner ends of the second springs are respectively fixedly connected to the inner bottom walls of the mounting seats.

[0010] As a preferred technical solution of the present invention, the reinforcement structure includes two guide frames respectively fixed on the outer side walls of the inner arch frame, each of the guide frames is slidably connected with a column, a connecting rod is fixedly connected between adjacent columns, two movable openings are symmetrically provided on the inner arch frame, and connecting blocks are slidably connected in the two movable openings, one end of the connecting block is fixedly connected to the connecting rod, and the other end of the connecting block is fixedly connected to a pedal, a positioning block is fixedly connected to the pedal, and the positioning block is connected to the inner arch frame by bolts.

[0011] As a preferred technical solution of the present invention, a group of reinforcement seats are fixedly connected to the inner walls on both sides of the outer arch frame, and reinforcement blocks are clamped in the reinforcement seats. The ends of the reinforcement blocks away from the reinforcement seats are fixedly connected to the inner arch frame.

[0012] As a preferred technical solution of the present invention, two threaded barrels are fixedly connected to the inner walls on both sides of the outer arch frame, and the threaded barrels are connected to the inner arch frame through hexagon socket bolts.

[0013] As a preferred technical solution of the present invention, a groove matching the movable plate is provided on the outer arch frame, and a socket matching the spline shaft is provided on the outer arch frame.

[0014] As a preferred technical solution of the present invention, the lower end surface of the support frame is symmetrically and fixedly connected with two groups of first assembly blocks, the inner side wall of the inner arch frame is fixedly connected with a second assembly block corresponding to the position of the first assembly block, and a reinforcing rod is connected between the first assembly block and the second assembly block through a bolt assembly.

[0015] As a preferred technical solution of the present invention, four ferrules are evenly and fixedly connected to the lower end surface of the support frame, the four ferrules are respectively connected to the bottom sleeve through a bolt assembly, and a reinforcing column is provided between two adjacent ferrules in the longitudinal direction.

[0016] As a preferred technical solution of the present invention, three sliding openings matching the adjusting rods are provided on the top of the inner arch frame.

[0017] Compared with the prior art, the present invention has the following beneficial effects: In the scheme of the present invention: 1. Through the set sliding sleeve, spline shaft, moving plate, bidirectional screw, moving block, adjusting rod, connecting tube, first spring and sliding plate, elastic support of the moving plate is achieved, so that the top plate can be closely fitted with the rock wall of the tunnel guide to improve the stability and effect of the support, and solve the problem of poor support effect caused by poor fit between the outer arch frame and the tunnel rock wall in the prior art; 2. By setting the moving block and the supporting structure, the arc plate can be adaptively adjusted when the tunnel wall is slightly deformed, so as to maintain the stability of the supporting structure and reduce the pressure on the tunnel wall, thus solving the problem of poor supporting effect of the supporting shaft in the prior art; 3. By setting the reinforcement seat, reinforcement block, threaded barrel and hexagon socket bolt, the outer arch frame and the inner arch frame can be quickly connected without welding, which reduces the difficulty of installation, facilitates combined installation, improves installation efficiency, and solves the problem of low installation efficiency in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the combined structure provided by the present invention; Figure 2 A front view schematic diagram of the structure provided by the present invention; Figure 3 A schematic diagram of a single internal structure provided by the present invention; Figure 4 A schematic diagram of the structure of the outer arch frame and its connecting parts provided by the present invention; Figure 5 A schematic diagram of the support adjustment structure provided by the present invention; Figure 6 A schematic diagram of the internal structure of the outer arch provided by the present invention; Figure 7 A schematic diagram of the reinforcement structure provided by the present invention; Figure 8 A schematic structural diagram of another perspective of the combination provided by the present invention.

[0019] Indicated in the figure: 1. Outer arch; 2. Sliding sleeve; 3. Spline shaft; 4. Moving plate; 5. Inner arch; 6. Support frame; 7. Fixed seat; 8. Bidirectional screw; 9. Driving structure; 901. Worm gear; 902. Rotating rod; 903. Worm; 904. Hand wheel; 10. Moving block; 11. First connecting block; 12. Adjusting rod; 13. Second connecting block; 14. Top plate; 15. Connecting tube; 16. Bottom plate; 17. First spring; 18. Slide plate; 19. Support structure; 1901. Mounting seat ; 1902, arc plate; 1903, second spring; 20, reinforcement structure; 2001, guide frame; 2002, plug column; 2003, connecting rod; 2004, connecting block; 2005, pedal; 2006, positioning block; 21, reinforcement seat; 22, reinforcement block; 23, threaded barrel; 24, hexagon socket bolt; 25, groove; 26, socket; 27, first assembly block; 28, second assembly block; 29, reinforcement rod; 30, sleeve; 31, bottom sleeve; 32, reinforcement column. DETAILED DESCRIPTION

[0020] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0021] like Figure 1-Figure 8As shown, the present embodiment proposes a highway soft rock tunnel arch support construction device, including an outer arch frame 1, three sliding sleeves 2 are evenly fixedly connected on the inner side wall of the outer arch frame 1, spline shafts 3 are slidably connected in the three sliding sleeves 2, and movable plates 4 are fixedly connected at the ends of the spline shafts 3. The sliding sleeves 2 can make the spline shafts 3 slide up and down stably, so that the movable plates 4 can be stably moved and lifted, so that the movable plates 4 can fit the tunnel rock wall to improve the support effect. An inner arch frame 5 is provided in the outer arch frame 1, and a support frame 6 is fixedly connected in the inner arch frame 5. The upper end surface of the support frame 6 is symmetrical and fixedly connected with two fixed seats 7, and a bidirectional screw 8 is rotatably connected between the two fixed seats 7. A driving structure 9 for driving the bidirectional screw 8 to rotate is provided on the support frame 6, and two moving blocks 10 are symmetrically and threadedly connected on the bidirectional screw 8. Three first connecting blocks 11 are fixedly connected to the two moving blocks 10, and the first connecting blocks 11 are rotatably connected with adjusting rods 12. The top of the adjusting rod 12 is rotatably connected to A second connecting block 13 is connected, and the top ends of adjacent second connecting blocks 13 are fixedly connected with a top plate 14. A connecting tube 15 is fixed at the center of the upper end surface of the top plate 14. A bottom plate 16 is fixedly connected in the connecting tube 15. The upper end surface of the bottom plate 16 is fixedly connected with a first spring 17. The top end of the first spring 17 is fixedly connected with a slide plate 18. The slide plate 18 is slidably connected to the connecting tube 15. The two moving blocks 10 can move simultaneously through the rotation of the bidirectional screw 8. The movement of the moving block 10 can drive the adjusting rod 12 to move. The movement of the adjusting rod 12 can drive the top plate 14 to move. With the movement of the top plate 14, the connecting tube 15 approaches the outer arch 1, and then the slide plate 18 contacts the bottom end of the spline shaft 3. With the continued movement, the first spring 17 is deformed, and then the moving plate 4 is elastically supported, so that it fits well with the tunnel rock wall, thereby improving the support effect. Two supporting structures 19 are symmetrically provided on the top plate 14, and reinforcement structures 20 are provided at both ends of the inner arch 5.

[0022] like Figure 1 , Figure 3 and Figure 5 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the driving structure 9 includes a worm gear 901 fixed at the center of the bidirectional screw 8, a rotating rod 902 is rotatably connected to the support frame 6, the top of the rotating rod 902 is fixedly connected to a worm 903 meshing with the worm gear 901, and the bottom of the rotating rod 902 is fixedly connected to a handwheel 904; the worm 903 is driven to rotate by the handwheel 904, thereby driving the worm gear 901 and the bidirectional screw 8 to rotate. Due to the symmetrical thread design of the bidirectional screw 8, the two moving blocks 10 can move toward the center or both sides at the same time to realize the lifting and lowering adjustment of the top plate 14. The operation is simple and the adjustment is precise, which improves the adaptability of the support structure and can be flexibly adjusted according to different geological conditions. The three moving plates 4 can be lifted at the same time, so that the moving plates 4 can fit well with the tunnel wall.

[0023] like Figure 1 , Figure 2 and Figure 5 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the support structure 19 includes two mounting seats 1901 that are symmetrical and fixed on the upper end surface of the top plate 14, and the mounting seats 1901 are slidably connected with an arc plate 1902, and the bottom end of the arc plate 1902 is evenly fixedly connected with a group of second springs 1903, and the inner ends of the second springs 1903 are respectively fixedly connected to the inner bottom wall of the mounting seat 1901; the arc plate 1902 in the mounting seat 1901 provides additional supporting force through the second spring 1903, thereby increasing the contact area and stability between the top plate 14 and the tunnel wall. When the tunnel wall undergoes a slight deformation, the arc plate 1902 can be adaptively adjusted to maintain the stability of the support structure and reduce the pressure on the tunnel wall. At the same time, the arc plate 1902 can stably contact with the outer arch frame 1, thereby improving the support effect. Moreover, compared with the prior art, there is no need for welding for fixation, which greatly speeds up the installation efficiency.

[0024] like Figure 1 , Figure 3 and Figure 7 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the reinforcement structure 20 includes two guide frames 2001 respectively fixed on the outer side walls of the inner arch frame 5, the guide frames 2001 are slidably connected with the plug posts 2002, and the connecting rods 2003 are fixedly connected between the adjacent plug posts 2002. The inner arch frame 5 has two symmetrically opened movable openings, and the two movable openings are slidably connected with the connecting blocks 2004, one end of the connecting block 2004 is fixedly connected to the connecting rod 2003, and the other end of the connecting block 2004 is fixedly A pedal 2005 is fixedly connected, and a positioning block 2006 is fixedly connected to the pedal 2005, and the positioning block 2006 is connected to the inner arch frame 5 by bolts; fixing the positioning block 2006 by bolts is convenient for installing the inner arch frame 5. After the installation of the inner arch frame 5 is completed, the bolts on the positioning block 2006 are removed, and then pressure is applied to the pedal 2005 to make the connecting block 2004, the connecting rod 2003 and the plug column 2002 descend, so that the plug column 2002 is inserted into the ground, forming an additional support system, thereby enhancing the stability of the two ends of the inner arch frame 5.

[0025] like Figure 1 and Figure 2As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, a group of reinforcement seats 21 are fixedly connected to the inner walls on both sides of the outer arch frame 1, and reinforcement blocks 22 are clamped in the reinforcement seats 21. The reinforcement blocks 22 are fixedly connected to the inner arch frame 5 at one end away from the reinforcement seats 21; the connection strength between the outer arch frame 1 and the inner arch frame 5 is further enhanced by the combination of the reinforcement seats 21 and the reinforcement blocks 22, so that the entire support structure is more stable when it is subjected to the pressure above the tunnel, and the collapse or deformation of the support structure is effectively prevented, and it is also convenient to establish a connection between the outer arch frame 1 and the inner arch frame 5 without welding, thereby improving the efficiency of assembly.

[0026] like Figure 1 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, two threaded tubes 23 are fixedly connected to the inner walls on both sides of the outer arch frame 1, and the threaded tube 23 is connected to the inner arch frame 5 through the hexagon socket bolts 24; through the fastening connection between the threaded tube 23 and the hexagon socket bolts 24, the stability between the outer arch frame 1 and the inner arch frame 5 is further ensured, which is not only simple and easy, but also has high tensile strength and shear strength, and can withstand various external forces in tunnel construction.

[0027] like Figure 1 and Figure 6 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, a groove 25 matching the movable plate 4 is provided on the outer arch frame 1, and a socket 26 matching the spline shaft 3 is provided on the outer arch frame 1; the design of the groove 25 on the outer arch frame 1 and the socket 26 of the spline shaft 3 enables the movable plate 4 and the spline shaft 3 to slide and position smoothly, thereby ensuring the adjustment accuracy and stability of the support structure.

[0028] like Figure 1 and Figure 2 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the lower end surface of the support frame 6 is symmetrically and fixedly connected with two groups of first assembly blocks 27, and the inner side wall of the inner arch frame 5 is fixedly connected with a second assembly block 28 corresponding to the position of the first assembly block 27, and a reinforcing rod 29 is connected between the first assembly block 27 and the second assembly block 28 by a bolt assembly; the support frame 6 can be supported by the reinforcing rod 29, and the strength of the support frame 6 can be enhanced, thereby further improving the support effect.

[0029] like Figure 1 , Figure 2 and Figure 8As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the lower end surface of the support frame 6 is evenly fixedly connected with four clamping sleeves 30, and the four clamping sleeves 30 are respectively connected with bottom sleeves 31 through bolt assemblies, and a reinforcing column 32 is provided between two adjacent clamping sleeves 30 in the longitudinal direction; the support frame 6 and the inner arch frame 5 are connected through the reinforcing rod 29 and the clamping sleeve 30, the bottom sleeve 31 and the reinforcing column 32, so as to form a stable support system, improve the overall rigidity and stability of the support structure, and enhance its ability to withstand the pressure above the tunnel.

[0030] like Figure 1 As shown, as a preferred embodiment, on the basis of the above-mentioned method, three sliding openings matching the adjusting rod 12 are further opened on the top of the inner arch frame 5; the sliding opening design on the top of the inner arch frame 5 enables the adjusting rod 12 to smoothly pass through and connect to the top plate 14, thereby realizing the lifting and lowering adjustment function of the top plate 14, which not only improves the flexibility of the support structure, but also ensures the smoothness and reliability of the adjustment process.

[0031] Specifically, when the highway soft rock tunnel arch support construction device is working / in use: the outer arch frame 1 is placed in the installation position, and then the inner arch frame 5 is installed, so that the reinforcement block 22 is stuck in the reinforcement seat 21, and then the hexagon socket bolt 24 is screwed into the threaded tube 23, and then the bolt on the positioning block 2006 is removed, and the pedal 2005 is pressed to make the connecting block 2004, the connecting rod 2003 and the plug column 2002 descend, so that the plug column 2002 is inserted into the ground, and then the hand wheel 904 is turned to rotate the worm 903, and the rotation of the worm 903 drives the worm wheel 901 and the bidirectional screw 8 to rotate at the same time, and the rotation of the bidirectional screw 8 causes the two moving blocks 10 to move inward at the same time, so that the adjusting rod 12 The movement of the adjusting rod 12 drives the top plate 14 to approach the outer arch 1, thereby moving the slide plate 18 and contacting the bottom end of the spline shaft 3. During the movement, the first spring 17 is deformed, and the spline shaft 3 and the movable plate 4 move, thereby making the movable plate 4 fit the tunnel rock wall, thereby improving the support effect. During the movement of the top plate 14, the arc plate 1902 contacts the outer arch 1. As the top plate 14 moves, the arc plate 1902 squeezes the second spring 1903, and the second spring 1903 provides additional support force. When the tunnel wall is slightly deformed, the arc plate 1902 can be adaptively adjusted to maintain the stability of the support structure and reduce the pressure on the tunnel wall.

[0032] All technical features in this embodiment can be freely combined according to actual needs.

[0033] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention may also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A highway soft rock tunnel arch support construction device, comprising an outer arch (1), characterized in that: The inner wall of the outer arch frame (1) is evenly and fixedly connected with three sliding sleeves (2), the three sliding sleeves (2) are slidably connected with a spline shaft (3), the ends of the spline shaft (3) are fixedly connected with a moving plate (4), the outer arch frame (1) is provided with an inner arch frame (5), the inner arch frame (5) is fixedly connected with a support frame (6), the upper end surface of the support frame (6) is symmetrical and fixedly connected with two fixed seats (7), a bidirectional screw (8) is rotatably connected between the two fixed seats (7), the support frame (6) is provided with a driving structure (9) for driving the bidirectional screw (8) to rotate, the bidirectional screw (8) is symmetrically and threadedly connected with two moving blocks (10), and the two moving blocks (10) are fixedly connected with three first connecting blocks (11), the first connecting block (11) is rotatably connected to an adjusting rod (12), the top end of the adjusting rod (12) is rotatably connected to a second connecting block (13), the top ends of adjacent second connecting blocks (13) are commonly fixedly connected to a top plate (14), a connecting tube (15) is fixedly connected at the center of the upper end surface of the top plate (14), a bottom plate (16) is fixedly connected inside the connecting tube (15), the upper end surface of the bottom plate (16) is fixedly connected to a first spring (17), the top end of the first spring (17) is fixedly connected to a slide plate (18), the slide plate (18) is slidably connected to the connecting tube (15), two supporting structures (19) are symmetrically provided on the top plate (14), and reinforcement structures (20) are provided at both ends of the inner arch frame (5).

2. A highway soft rock tunnel arch support construction device according to claim 1, characterized in that: The driving structure (9) comprises a worm wheel (901) fixed at the center of the bidirectional screw (8); a rotating rod (902) is rotatably connected to the support frame (6); a worm (903) meshingly connected to the worm wheel (901) is fixedly connected to the top end of the rotating rod (902); and a hand wheel (904) is fixedly connected to the bottom end of the rotating rod (902).

3. A highway soft rock tunnel arch support construction device according to claim 1, characterized in that: The support structure (19) comprises two mounting seats (1901) which are symmetrical and fixed on the upper end surface of the top plate (14); an arc-shaped plate (1902) is slidably connected inside each of the mounting seats (1901); a group of second springs (1903) are evenly and fixedly connected to the bottom ends of the arc-shaped plates (1902); and the inner ends of the second springs (1903) are respectively fixedly connected to the inner bottom walls of the mounting seats (1901).

4. A highway soft rock tunnel arch support construction device according to claim 1, characterized in that: The reinforcement structure (20) comprises two guide frames (2001) respectively fixed on the outer side walls of the inner arch frame (5), each of the guide frames (2001) being slidably connected with a plug column (2002), and a connecting rod (2003) being fixedly connected between adjacent plug columns (2002), and two movable openings are symmetrically provided on the inner arch frame (5), and a connecting block (2004) is slidably connected in the two movable openings, one end of the connecting block (2004) is fixedly connected to the connecting rod (2003), and the other end of the connecting block (2004) is fixedly connected to a pedal (2005), and a positioning block (2006) is fixedly connected to the pedal (2005), and the positioning block (2006) is connected to the inner arch frame (5) by bolts.

5. A highway soft rock tunnel arch support construction device according to claim 1, characterized in that: A group of reinforcement seats (21) are fixedly connected to the inner walls on both sides of the outer arch frame (1), and reinforcement blocks (22) are clamped in the reinforcement seats (21). One end of the reinforcement block (22) away from the reinforcement seat (21) is fixedly connected to the inner arch frame (5).

6. A highway soft rock tunnel arch support construction device according to claim 1, characterized in that: Two threaded barrels (23) are fixedly connected to the inner walls on both sides of the outer arch frame (1), and the threaded barrels (23) are connected to the inner arch frame (5) via hexagon socket bolts (24).

7. A highway soft rock tunnel arch support construction device according to claim 1, characterized in that: The outer arch frame (1) is provided with a groove (25) matching the movable plate (4), and the outer arch frame (1) is provided with a socket (26) matching the spline shaft (3).

8. A highway soft rock tunnel arch support construction device according to claim 1, characterized in that: The lower end surface of the support frame (6) is symmetrically and fixedly connected with two groups of first assembly blocks (27); the inner side wall of the inner arch frame (5) is fixedly connected with a second assembly block (28) corresponding to the position of the first assembly block (27); and a reinforcing rod (29) is connected between the first assembly block (27) and the second assembly block (28) via a bolt assembly.

9. A highway soft rock tunnel arch support construction device according to claim 1, characterized in that: Four clamping sleeves (30) are evenly and fixedly connected to the lower end surface of the support frame (6); the four clamping sleeves (30) are respectively connected to a bottom sleeve (31) via a bolt assembly; and a reinforcing column (32) is provided between two adjacent clamping sleeves (30) in the longitudinal direction.

10. A highway soft rock tunnel arch support construction device according to claim 1, characterized in that: The top of the inner arch frame (5) is provided with three sliding openings matching the adjustment rod (12).

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