Scaffold special for construction in tunnel and using method of scaffold

Abstract

The invention provides a scaffold special for construction in a tunnel and a using method thereof, and belongs to the technical field of scaffolds special for construction in the tunnel, the scaffold structurally comprises a movable base, a first rotator is vertically arranged on the movable base, a swing frame set is transversely arranged on the top face of the first rotator, and a self-adaptive fence frame set is hinged to the right end of the swing frame set; through cooperative auxiliary cooperative operation of the structures, the fence frame piece can horizontally and stably move from right to left according to the arc-shaped surface track of the tunnel arc-shaped top, and workers can conveniently stand in the fence frame piece to conduct overall construction of the tunnel arc-shaped top.

Description

Technical Field

[0001] The invention relates to a special scaffold for tunnel construction and a use method thereof, belonging to the technical field of special scaffolds for tunnel construction. Background Art

[0002] The top surface of the tunnel is all arc-shaped, and scaffolding is required when constructing the arc-shaped top.

[0003] The existing scaffolding only has a vertical lifting function. When constructing an arc-shaped roof in a tunnel, due to the inconsistent heights of the arc-shaped roof, the scaffolding needs to be raised and lowered again for each horizontal shift, which is very troublesome. In view of the above shortcomings, the present invention proposes a special scaffolding for tunnel construction and a method for using the same. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention aims to provide a special scaffold for tunnel construction and a method of using the same to solve the existing problems.

[0005] To achieve the above-mentioned object, the present invention is implemented through the following technical solution: a scaffold specially used for tunnel construction, the structure of which includes a movable base, a first rotator being vertically arranged on the movable base, and a swing frame group being horizontally arranged on the top surface of the first rotator, an adaptive fence group being hinged to the right end of the swing frame group, and a counterweight block being sleeved on the left end of the swing frame group; The swing frame assembly includes a horizontal platform, and a telescopic arm seat is provided on the left side of the top surface of the horizontal platform, and a telescopic arm member is hinged on the telescopic arm seat, and a second rotator is connected to the hinge of the telescopic arm member. A support arm assembly is connected between the left side of the bottom surface of the telescopic arm member and the right end of the top surface of the horizontal platform; The support arm assembly includes a pressing slide assembly, and the pressing slide assembly is hinged to a support arm body, and the left end of the support arm body is hinged to a first movable seat for being fixed on the left side of the bottom surface of the telescopic arm member; The pressing slide assembly includes a slide member, a second movable seat is provided on the top surface of the slide member, and a pressing telescopic member is provided in a transverse movable sleeve in the groove on the bottom surface of the slide member; The adaptive fence frame group includes a fence frame, and a fence frame part is hinged at the right end of the fence frame, and a horizontal sensor is arranged on the horizontally aligned front side of the fence frame part. A plurality of infrared sensors are arranged horizontally and vertically on the right side of the fence frame part. Two electromagnetic slide groups are arranged on the front and rear sides of the slot at the right end of the fence frame, and the two electromagnetic slide groups are movably sleeved and fixed to the front and rear sides of the left end of the fence frame part by electromagnetic connection. The front side of the fence frame part is transmission-connected to a third rotator.

[0006] A further improvement is that a counterweight groove is provided on the left side of the top surface of the horizontal platform, and a slide pressing groove for pressing the movable clamping sleeve of the slide group is provided laterally on the right side of the top surface of the horizontal platform, and a clamping slider is provided on the right side of the slide pressing groove; The upper ends of the left and right groove walls of the slide seat pressing groove are provided with a plurality of anti-slip grooves, while the lower ends of the left and right groove walls of the slide seat pressing groove are provided with a plurality of pressing grooves, and each pressing groove is provided with a first pressing tooth.

[0007] A further improvement is that the slide member includes a slide body, and a plurality of anti-slip protrusions are provided on the left and right sides of the slide body, and a movable groove for a pressure member is opened on the bottom surface of the slide body, and a plurality of pressure openings are opened through the left and right groove walls of the movable groove for the pressure member.

[0008] A further improvement is that the pressing telescopic part includes a two-way telescope, and two pressing sliders are horizontally arranged on the left and right sides of the two-way telescope, and the pressing sliders are movably inserted into the pressing through opening, and the outer side surface of the pressing slider is provided with a second pressing tooth that movably engages with the first pressing tooth.

[0009] A further improvement is that a fence frame movable groove is opened on the left side of the fence frame, and a plurality of fence frame sleeve openings are opened through the front sides of the left and right groove walls of the fence frame movable groove, and a plurality of electromagnetic slide assembly openings are opened through the rear sides of the left and right groove walls of the fence frame movable groove.

[0010] A further improvement is that the fence frame part includes a fence frame body, and a plurality of rotating shafts for inserting into the fence frame sleeves are provided in the middle of the front and rear sides of the fence frame body, and two positioning slides for movably inserting and electromagnetically connecting with the electromagnetic slide group are also provided on the front and rear sides of the fence frame body. Each positioning slide is semicircular, and one of the two rotating shafts is connected to the third rotator in a transmission manner.

[0011] A further improvement is that each of the electromagnetic slide assemblies includes a bottom slide, a top slide is sleeved on the right side of the bottom slide, and an electromagnetic chuck is sleeved in the left groove of the bottom slide; An inner semicircular groove is provided on the left side of the bottom slide, and an electromagnetic suction cup opening is provided through the middle of the left groove wall of the inner semicircular groove, and an outer semicircular groove is provided on the right side of the top slide; The diameter of the inner semicircular arc groove and the outer semicircular arc groove after being fitted together is adapted to the cross-section of the positioning slide rod, and the right side of the electromagnetic suction cup is provided with an arc-shaped magnetic surface for magnetically attracting the surface of the positioning slide rod.

[0012] A further improvement is that the movable base, telescopic arm, first rotator, second rotator and third rotator are all existing technologies, and their structures are not described here one by one.

[0013] In addition, the present invention also provides a method for using the above-mentioned special scaffold for tunnel construction, and the method for using is as follows: First, move the equipment into the tunnel and place it horizontally. Then, move the base to the middle of the tunnel width. Then, extend the telescopic arm to the right to move the adaptive barrier group to the right side of the tunnel. The infrared sensor will simultaneously perform anti-collision sensing of the adaptive barrier group. Then, the staff can use the auxiliary frame to enter the adaptive barrier group to carry out the construction of the tunnel arc top. When the adaptive fence group is to move from right to left along the curved surface of the tunnel's curved top, the swing frame group is adjusted to first cancel the pressing engagement of the pressing slide group with the slide pressing groove, and then the second rotator drives the telescopic arm to perform a 0-90° arc swing adjustment on the telescopic arm seat, and the swing angle each time is 5-10°. During this process, the pressing slide group will slide to the left in the slide pressing groove, and then the pressing slide group will re-engage the slide pressing groove, so that the support arm group will be driven to expand the positioning and reinforcement support of the telescopic arm after the swing angle; In addition, when the tilt angle of the telescopic arm changes, it will be sensed by the horizontal sensor, and the synchronous adaptive fence group will make horizontal adaptive adjustments. First, the electromagnetic suction cup cancels the electromagnetic connection of the positioning slide bar, and then the third rotator drives the fence frame to swing horizontally. During this process, the positioning slide bar will slide in the caliber formed by the inner semicircular groove and the outer semicircular groove. Then, the arc-shaped magnetic surface on the electromagnetic suction cup will re-electromagnetically adsorb and fix the surface of the positioning slide bar to enhance the horizontal stability of the fence frame. In addition, when the telescopic arm is in a vertical state, the second rotator drives the swing frame group and the adaptive barrier frame group to rotate 180 degrees, and then the swing frame group can be adjusted to swing to the left from 90-0 degrees, and the adaptive barrier frame group performs synchronous horizontal adaptive adjustment, so that the adaptive barrier frame group can move from the right side of the tunnel to the left side of the tunnel according to the curved surface of the curved top of the tunnel during construction.

[0014] The beneficial effects of the present invention are: The present invention provides a special scaffold for tunnel construction and a method for using the same. The special scaffold is constructed by a structural combination design of a movable base, a first rotator, a swing frame group, an adaptive barrier group, and a counterweight block. The first rotator mainly drives the swing frame group and the adaptive barrier group to perform a 180-degree rotation and side-changing operation.

[0015] The swing frame group composed of a horizontal platform, a telescopic arm seat, a telescopic arm part, a second rotator and a support arm group has the function of swinging 90° according to the arc surface of the arc-shaped top of the tunnel, and the telescopic arm part also has the function of assisting the adaptive frame group to perform anti-collision adaptive telescopic function, and the support arm group assists the telescopic arm part in adaptively unfolding after the swing angle and re-engaging the positioning support with the horizontal platform to prevent the second rotator from being unable to brake due to excessive pressure.

[0016] The adaptive barrier frame group, which is composed of a barrier frame, a barrier frame part, a horizontal sensor, an infrared sensor, and an electromagnetic slide group, has the function of synchronously performing adaptive horizontal adjustment when the telescopic arm part has a change in tilt angle, so that no matter what angle the telescopic arm part swings to, the barrier frame part can synchronously maintain a horizontal state, so that the workers in the barrier frame part will not have problems standing unstable. The electromagnetic slide group acts on the reinforced horizontal positioning of the barrier frame part, so that the barrier frame part remains in a horizontal and stable state and there is no risk of the barrier frame part tilting due to uneven pressure from the workers standing on the side of the barrier frame part.

[0017] Through the coordinated and auxiliary operation of the above structures, the fence frame can be moved horizontally and stably from right to left along the arc surface trajectory of the tunnel arc top, making it convenient for workers to stand in the fence frame to carry out the overall construction of the tunnel arc top. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of a special scaffold structure for tunnel construction according to the present invention; Figure 2 This is a schematic diagram of the horizontal platform structure of the present invention; Figure 3 This is a right side view of the slide pressing groove of the present invention; Figure 4 This is a schematic structural diagram of the support arm group of the present invention; Figure 5 This is a right side view of the pressing slide assembly of the present invention; Figure 6 This is a schematic diagram of the structure of the adaptive column frame group of the present invention; Figure 7 This is a schematic diagram of the top surface structure of the fence frame of the present invention; Figure 8 This is a schematic diagram of the frame structure of the present invention; Figure 9 This is a schematic diagram of the top surface structure of the electromagnetic slide assembly of the present invention; Figure 10 This is a schematic diagram of the structure of the electromagnetic chuck of the present invention; Figure 11 This is a rendering of the slide pressing groove and the pressing slide assembly of the present invention. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] See also Figures 1-11 The present invention provides a special scaffold for tunnel construction and a method for using the same: its structure includes a mobile base 1, and a first rotator 2 is vertically arranged on the mobile base 1, and a swing frame group 3 is horizontally arranged on the top surface of the first rotator 2, the right end of the swing frame group 3 is hinged with an adaptive fence group 4, and the left end of the swing frame group 3 is sleeved with a counterweight 5, the swing frame group 3 includes a horizontal platform 31, and a telescopic arm seat 32 is arranged on the left side of the top surface of the horizontal platform 31, and a telescopic arm member 33 is hinged on the telescopic arm seat 32, and the hinge of the telescopic arm member 33 is transmission-connected with a second rotator 34, a support arm group 35 is connected between the left side of the bottom surface of the telescopic arm member 33 and the right end of the top surface of the horizontal platform 31, and the support arm group 35 includes a pressing slide group 351, and a support arm body 352 is hinged on the pressing slide group 351, and the support arm body 352 The left end is hinged with a first movable seat 353 for being fixed on the left side of the bottom surface of the telescopic arm member 33, the said pressing slide group 351 includes a slide member 354, and a second movable seat 355 is provided on the top surface of the slide member 354, and a pressing telescopic member 356 is provided in the groove on the bottom surface of the slide member 354. The said adaptive fence group 4 includes a fence frame 41, and the fence frame 41 is hinged with a fence member 42 on the right end, and a horizontal sensor 43 is provided on the horizontally aligned front side of the fence member 42. A plurality of infrared sensors 44 are provided horizontally and vertically on the right side of the fence member 42. Two electromagnetic slide groups 45 are provided on the front and rear sides of the notch at the right end of the fence frame 41, and the two electromagnetic slide groups 45 and the front and rear sides of the left end of the fence member 42 are movably sleeved through each other and electromagnetically connected and fixed. The front side of the fence member 42 is transmission-connected with a third rotator 46.

[0021] A counterweight block slot 311 is provided on the left side of the top surface of the horizontal platform 31, and a slide pressing groove 312 for pressing the movable sleeve of the slide group 351 is provided laterally on the right side of the top surface of the horizontal platform 31. A locking slider 313 is provided on the right side of the slide pressing groove 312. A plurality of anti-slip grooves 3121 are provided on the upper ends of the left and right groove walls of the slide pressing groove 312, and a plurality of pressing grooves 3122 are provided on the lower ends of the left and right groove walls of the slide pressing groove 312, and a first pressing tooth 3123 is provided in each pressing groove 3122.

[0022] The sliding seat member 354 includes a sliding seat body 3541, and a plurality of anti-slip protrusions 3542 are provided on the left and right sides of the sliding seat body 3541, and a movable groove 3543 for pressing the pressing member is opened on the bottom surface of the sliding seat body 3541, and a plurality of pressing openings 3544 are opened through the left and right groove walls of the movable groove 3543 for pressing the pressing member.

[0023] The pressing and retractable member 356 includes a bidirectional retractor 3561, and two pressing sliders 3562 are horizontally arranged on the left and right sides of the bidirectional retractor 3561, and the pressing sliders 3562 are movably inserted into the pressing opening 3544. The outer side surface of the pressing slider 3562 is provided with a second pressing tooth 3563 that movably engages with the first pressing tooth 3123.

[0024] The left side of the fence frame 41 is provided with a fence frame movable groove 411, and the front sides of the left and right groove walls of the fence frame movable groove 411 are provided with multiple fence frame sleeve openings 412, and the rear sides of the left and right groove walls of the fence frame movable groove 411 are provided with multiple electromagnetic slide assembly openings 413.

[0025] The fence frame part 42 includes a fence frame body 421, and a plurality of rotating shafts 422 for inserting into the fence frame sleeve 412 are provided in the middle of the front and rear sides of the fence frame body 421, and two positioning slides 423 for movably inserting and electromagnetically connecting with the electromagnetic slide group 45 are also provided on the front and rear sides of the fence frame body 421. Each positioning slide 423 is semicircular in shape, and one of the two rotating shafts 422 is transmission-connected to the third rotator 46.

[0026] Each electromagnetic slide group 45 includes a bottom slide 451, and a top slide 452 is fitted on the right side of the bottom slide 451, and an electromagnetic suction cup 453 is fitted in the left groove of the bottom slide 451. An inner semicircular groove 4511 is provided on the left side of the bottom slide 451, and an electromagnetic suction cup opening 4512 is provided through the middle of the left groove wall of the inner semicircular groove 4511. An outer semicircular groove 4521 is provided on the right side of the top slide 452. The diameter of the inner semicircular groove 4511 and the outer semicircular groove 4521 after fitting together is adapted to the cross-section of the positioning slide 423. The right side of the electromagnetic suction cup 453 is provided with an arc-shaped magnetic surface 4531 for magnetically attracting the surface of the rod body of the positioning slide 423. Working principle: Including the following usage: First, the device is moved to the tunnel and placed horizontally. Then, the mobile base 1 is shifted to the middle of the tunnel width. Then, the telescopic arm 33 is extended horizontally to the right to move the adaptive fence group 4 to the right side of the tunnel. The infrared sensor 44 simultaneously performs anti-collision sensing of the adaptive fence group 4. Then, the staff can use the auxiliary frame to enter the adaptive fence group 4 to carry out the construction of the tunnel arc top. It should be noted that the telescopic arm 33 is in a horizontal state at this time, and the adaptive fence group 4 is also in a horizontal state. When the telescopic arm 33 is extended to the right, the horizontal infrared sensors 44 in each infrared sensor 44 perform anti-collision sensing.

[0027] When the adaptive fence group 4 is to move from right to left along the curved surface of the tunnel arc top, the swing frame group 3 is adjusted to first cancel the pressing engagement of the pressing slide group 351 with the slide pressing groove 312, and then the second rotator 34 drives the telescopic arm member 33 to perform an arc swing adjustment of 0-90° on the telescopic arm seat 32, and the swing angle each time is 5-10°. During this process, the pressing slide group 351 will slide leftward in the slide pressing groove 312, and then the pressing slide group 351 will re-engage with the slide pressing groove 312, so that the support arm group 35 is driven to expand the positioning and reinforcement support of the telescopic arm member 33 after the swing angle; It should be noted that the pressing engagement of the pressing slide assembly 351 with the slide pressing groove 312 is canceled by the bidirectional retracting of the bidirectional retractor 3561, which simultaneously pulls the two pressing slide blocks 3562 to slide in the pressing passage 3544 toward the bidirectional retractor 3561, disengaging the first pressing teeth 3123 and the second pressing teeth 3563. Conversely, the bidirectional retractor 3561 extends, and the first pressing teeth 3123 and the second pressing teeth 3563 engage to position the pressing slide assembly 351, preventing the telescopic arm member 33 from being pressed and causing the support arm assembly 35 to slide out of its deployed state. In addition, when the telescopic arm 33 is swinging at an angle, the infrared sensor of each infrared sensor 44 is closest to the inner wall of the tunnel, so that the telescopic arm 33 can cooperate with the infrared sensor 44 to adaptively stretch and retract while swinging at an angle, so that the adaptive fence group 4 will not have the problem of collision when walking on the curved surface brought by the telescopic arm 33. This is because the curved top of the tunnel is not a perfect circular arc top.

[0028] In addition, when the tilt angle of the telescopic arm 33 changes, it will be sensed by the horizontal sensor 43, and the synchronous adaptive fence group 4 will perform horizontal adaptive adjustment. First, the electromagnetic suction cup 453 cancels the electromagnetic connection with the positioning slide 423, and then the third rotator 46 drives the fence member 42 to swing horizontally. During this process, the positioning slide 423 will slide within the caliber formed by the inner semicircular arc groove 4511 and the outer semicircular arc groove 4521. Then, the arc-shaped magnetic surface 4531 on the electromagnetic suction cup 453 re-electromagnetically adsorbs and fixes the rod surface of the positioning slide 423, thereby enhancing the horizontal stability of the fence member 42. It should be noted that the arc-shaped magnetic surface 4531 and the surface of the positioning slide 423 always maintain a two-surface pressure, so that the electromagnetic suction cup 453 and the positioning slide 423 can be electromagnetically connected or disconnected by simply turning the power on or off of the electromagnetic suction cup 453. The swing of the fence frame 42 can be directly achieved by rotating the third rotator 46. However, the self-locking function of the brake in the third rotator 46 is prone to unilateral load-bearing when the staff stands on the side of the fence frame body 421, which causes the self-locking brake in the third rotator 46 to bear too much pressure and fail to brake. Therefore, it is important to cooperate with the electromagnetic slide group 45 and the positioning slide rod 423 to assist in the electromagnetic connection positioning reinforcement.

[0029] In addition, when the telescopic arm 33 is in a 90° vertical state, the second rotator 34 drives the swing frame group 3 and the adaptive fence group 4 to rotate 180°, and then the swing frame group 3 can be adjusted to swing leftward from 90-0°, and the adaptive fence group 4 can be synchronously adjusted horizontally, so that the adaptive fence group 4 can move from the right side of the tunnel to the left side of the tunnel according to the curved surface of the curved top of the tunnel during construction. It should be noted that when the telescopic arm 33 swings to a vertical state, the fence member 42 on the adaptive fence group 4 is also adaptively adjusted to a horizontal state. When the second rotator 34 drives the swing frame group 3 and the adaptive fence group 4 to rotate 180° and change sides, the fence member 42 will only rotate in place. At this time, the staff need to stand in the center area of ​​the fence member 42 for safety.

[0030] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims, not the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be included within the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0031] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A special scaffold for tunnel construction, comprising a movable base (1), a first rotator (2) vertically arranged on the movable base (1), and a swing frame group (3) laterally arranged on the top surface of the first rotator (2), an adaptive fence group (4) hingedly connected to the right end of the swing frame group (3), and a counterweight block (5) sleeved on the left end of the swing frame group (3); The swing frame assembly (3) includes a horizontal platform (31), and a telescopic arm seat (32) is provided on the left side of the top surface of the horizontal platform (31), and a telescopic arm member (33) is hingedly connected to the telescopic arm seat (32), and a second rotator (34) is connected to the hinge of the telescopic arm member (33). A support arm assembly (35) is connected between the left side of the bottom surface of the telescopic arm member (33) and the right end of the top surface of the horizontal platform (31); The support arm assembly (35) includes a pressing slide assembly (351), and a support arm body (352) is hingedly connected to the pressing slide assembly (351), and a first movable seat (353) is hingedly connected to the left end of the support arm body (352) for being fixed on the left side of the bottom surface of the telescopic arm member (33); The pressing slide assembly (351) includes a slide member (354), a second movable seat (355) is provided on the top surface of the slide member (354), and a pressing telescopic member (356) is provided in a transverse movable sleeve in a groove on the bottom surface of the slide member (354); The adaptive fence group (4) includes a fence frame (41), and the fence frame (41) is hinged with a fence frame member (42) at the right end, and a horizontal sensor (43) is arranged on the front side of the fence member (42) in a horizontal alignment, and a plurality of infrared sensors (44) are arranged horizontally and vertically on the right side of the fence member (42), and two electromagnetic slide groups (45) are arranged on the front and rear sides of the notch at the right end of the fence frame (41), and the two electromagnetic slide groups (45) and the front and rear sides of the left end of the fence member (42) are movably sleeved and fixed by electromagnetic connection, and the front side of the fence member (42) is transmission-connected with a third rotator (46).

2. A special scaffold for tunnel construction according to claim 1, characterized in that: A counterweight block groove (311) is provided on the left side of the top surface of the horizontal platform (31), and a slide pressing groove (312) for pressing the movable sleeve of the slide group (351) is provided on the right side of the top surface of the horizontal platform (31), and a card slider (313) is provided on the right side of the slide pressing groove (312); The upper ends of the left and right groove walls of the slide seat pressing groove (312) are provided with a plurality of anti-slip grooves (3121), while the lower ends of the left and right groove walls of the slide seat pressing groove (312) are provided with a plurality of pressing grooves (3122), and each pressing groove (3122) is provided with a first pressing tooth (3123).

3. The special scaffold for tunnel construction according to claim 2, characterized in that: The slide member (354) includes a slide body (3541), and a plurality of anti-slip protrusions (3542) are provided on the left and right sides of the slide body (3541), and a movable groove (3543) for a pressing member is provided on the bottom surface of the slide body (3541), and a plurality of pressing openings (3544) are provided through the left and right groove walls of the movable groove (3543).

4. A special scaffold for tunnel construction according to claim 3, characterized in that: The pressing and retractable member (356) includes a bidirectional retractor (3561), and two pressing sliders (3562) are laterally arranged on the left and right sides of the bidirectional retractor (3561), and the pressing sliders (3562) are movably inserted into the pressing opening (3544). The outer side surface of the pressing slider (3562) is provided with a second pressing tooth (3563) that movably engages with the first pressing tooth (3123).

5. The special scaffold for tunnel construction according to claim 4, characterized in that: The left side of the fence frame (41) is provided with a fence frame movable groove (411), and the front sides of the left and right groove walls of the fence frame movable groove (411) are provided with a plurality of fence frame sleeve openings (412), and the rear sides of the left and right groove walls of the fence frame movable groove (411) are provided with a plurality of electromagnetic slide assembly openings (413).

6. The special scaffold for tunnel construction according to claim 5, characterized in that: The fence frame member (42) includes a fence frame body (421), and a plurality of rotating shafts (422) for being inserted into the fence frame sleeve (412) are provided in the middle of the front and rear sides of the fence frame body (421), and two positioning slide bars (423) for being movably inserted into the electromagnetic slide assembly (45) and fixedly connected to the electromagnetic slide assembly (45) are also provided on the front and rear sides of the fence frame body (421), each positioning slide bar (423) is semicircular, and one of the two rotating shafts (422) is transmission-connected to the third rotator (46).

7. The special scaffold for tunnel construction according to claim 6, characterized in that: Each electromagnetic slide assembly (45) includes a bottom slide (451), a top slide (452) is sleeved on the right side of the bottom slide (451), and an electromagnetic suction cup (453) is sleeved in the left groove of the bottom slide (451); An inner semicircular groove (4511) is provided on the left side of the bottom slide (451), and an electromagnetic suction cup opening (4512) is provided through the middle of the left groove wall of the inner semicircular groove (4511), and an outer semicircular groove (4521) is provided on the right side of the top slide (452); The diameter of the inner semicircular arc groove (4511) and the outer semicircular arc groove (4521) after being fitted together is adapted to the cross-section of the positioning slide rod (423), and the right side of the electromagnetic suction cup (453) is provided with an arc-shaped magnetic attraction surface (4531) for magnetically attracting the surface of the rod body of the positioning slide rod (423).

8. A method for using the special scaffold for tunnel construction according to claim 7, characterized in that: Here’s how to use it: First, the device is moved to the tunnel and placed horizontally. Then, the mobile base (1) is shifted to the middle of the width of the tunnel. Then, the telescopic arm (33) is extended horizontally to the right to move the adaptive fence group (4) to the right side of the tunnel. The infrared sensor (44) simultaneously performs anti-collision sensing of the adaptive fence group (4). Then, the staff can use the auxiliary frame to enter the adaptive fence group (4) to carry out the construction of the tunnel arc top. When the adaptive fence group (4) is to move from right to left along the arc surface of the tunnel arc top, the swing frame group (3) is adjusted, and first the pressing engagement of the pressing slide group (351) with the slide pressing groove (312) is cancelled, and then the second rotator (34) drives the telescopic arm member (33) to perform 0-90° arc swing adjustment on the telescopic arm seat (32), and the swing angle each time is 5-10°. During this process, the pressing slide group (351) will slide leftward in the slide pressing groove (312), and then the pressing slide group (351) will re-engage with the slide pressing groove (312), so that the support arm group (35) is driven to expand the positioning reinforcement support of the telescopic arm member (33) after the swing angle; In addition, when the tilt angle of the telescopic arm member (33) changes, it will be sensed by the horizontal sensor (43), and the synchronous adaptive fence group (4) will make horizontal adaptive adjustments. First, the electromagnetic suction cup (453) removes the electromagnetic connection of the positioning slide bar (423), and then the third rotator (46) drives the fence member (42) to swing horizontally. During this process, the positioning slide bar (423) will slide in the caliber formed by the inner semicircular arc groove (4511) and the outer semicircular arc groove (4521). Then, the arc-shaped magnetic surface (4531) on the electromagnetic suction cup (453) re-electromagnetically adsorbs and fixes the rod surface of the positioning slide bar (423), thereby enhancing the horizontal stability of the fence member (42); In addition, when the telescopic arm member (33) is in a 90° vertical state, the second rotator (34) drives the swing frame group (3) and the adaptive fence group (4) to rotate 180°, and then the swing frame group (3) can be adjusted to perform a leftward swing operation from 90-0°, and the adaptive fence group (4) performs synchronous horizontal adaptive adjustment, so that the adaptive fence group (4) can move from the right side of the tunnel to the left side of the tunnel according to the arc surface of the tunnel arc top during construction.

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