Adjustable tunnel excavation rack

Abstract

The utility model relates to the technical field of excavation racks of tunnel engineering, and discloses an adjustable tunnel excavation rack which comprises a main rack, a lifting rack, a side wall overturning platform device and a clamping piece, the top end of the main rack is provided with the lifting rack, the bottom end of the lifting rack is provided with four sliding rods which are distributed in an axial symmetry mode, and the side wall overturning platform device is arranged on the side wall overturning platform device. The four sliding rods are correspondingly connected in the clamping pieces in a sliding fit mode, the four clamping pieces distributed in an axial symmetry mode are arranged at the inner end of the main rack, the clamping pieces are correspondingly connected with the sliding rods in a matched and clamped mode, and two side wall overturning platform devices distributed in an axial symmetry mode are arranged on the two opposite side walls of the main rack. The adjustable tunnel excavation rack is reasonable in structure, simple, accurate and flexible in lifting, wide in application range and capable of greatly improving the working speed and quality of tunnel construction.

Description

TECHNICAL FIELD

[0001] The utility model relates to tunnel engineering's excavation rack technical field, concretely is a kind of adjustable tunnel excavation rack. BACKGROUND

[0002] With the development of modernization, people's lifestyle has changed dramatically compared to the past, and the most obvious change is transportation. With the development of transportation, people need to build more transportation. In the process of transportation construction, tunnel construction is also very important for transportation construction. Therefore, in order to improve the efficiency of tunnel construction, tunnel excavation rack is usually used to assist tunnel construction.

[0003] Traditional tunnel excavation rack is usually fixed structure, size is not adjustable or adjustment range is extremely limited, when facing different geological conditions, design specifications of tunnel, the adaptability of this fixed structure rack is extremely poor, for example, when encountering large-section tunnel, fixed-size rack cannot meet the demand of large-area construction, resulting in low construction efficiency, while in small-section tunnel construction, too large rack will cause space waste and affect construction operation. In addition, the traditional rack has single function and cannot integrate multiple construction auxiliary functions. Therefore, we propose a kind of adjustable tunnel excavation rack. SUMMARY

[0004] (I) Technical problem solved

[0005] In view of the shortcomings of the prior art, the utility model provides an adjustable tunnel excavation rack, which solves the above problems.

[0006] (II) Technical scheme

[0007] To achieve the above purpose, the utility model provides the following technical scheme: an adjustable tunnel excavation rack, comprising a main rack, a lifting rack, a side wall overturning platform device and a clamping piece, the top end of the main rack is provided with a lifting rack, the bottom end of the lifting rack is provided with four sliding rods which are distributed in axis symmetry, the four sliding rods are slidably connected with the clamping piece inside, the inner end of the main rack is provided with four clamping pieces which are distributed in axis symmetry, the clamping pieces are matched with the sliding rods, and the two opposite side walls of the main rack are provided with two side wall overturning platform devices which are distributed in axis symmetry.

[0008] Preferably, four corners of the main rack bottom end are provided with support columns in axial symmetry, and the support columns are internally provided with sliding grooves, the sliding grooves are open at the top end of the main rack, and the sliding grooves are in sliding fit connection with the sliding rods, the two support columns on the long side of the main rack are provided with a group of observation holes in equidistance distribution at the top end of the opposite sides, and the side walls of the support columns are provided with hollow clamping adjusting boxes at the top end of the observation holes, the clamping adjusting boxes are internally provided with clamping pieces, and the clamping adjusting boxes are provided with fitting holes at the center of the side away from the support columns, the fitting holes are concentric with the top end of the observation hole group, and the side of the support column away from the clamping adjusting box is provided with two groups of connecting holes one in axial symmetry, and the two opposite short sides of the main rack are provided with rotating rods in axial symmetry.

[0009] Preferably, the sliding rod side wall of the lifting rack bottom end is provided with a group of adjusting holes in equidistance distribution, and the lifting rack top end side is provided with a ring of fences, and the lifting rack top end is internally provided with anti-skid rubber strips one.

[0010] Preferably, the side wall overturning platform device is composed of three parts, namely a side platform, two groups of connecting rods in axial symmetry and fixing blocks, and the connecting rods and the fixing blocks are in rotary connection, the fixing blocks are provided with a group of connecting holes two at the end face, the connecting holes two are in fit connection with the connecting holes one through adaptive screws, and the connecting rods are in rotary connection with the side platform at the end away from the fixing blocks.

[0011] Preferably, the side platform side wall is provided with a rotating hole in rotary fit connection with the rotating rod, and the side platform bottom end is provided with two connecting blocks in axial symmetry, the connecting blocks are in rotary connection with the shaft end of the connecting rod, and the side platform top end is provided with anti-skid rubber strips two.

[0012] Preferably, the clamping piece is composed of two parts, namely a sliding plate and an elastic piece, and the sliding plate and the elastic piece are welded at the end face, the sliding plate is provided with a clamping block at the center of the side away from the elastic piece, the clamping block is in fit clamping with the adjusting hole through the sliding groove, the sliding plate is provided with a pull ring at the center of the side corresponding to the elastic piece, the pull ring is in sliding fit connection with the fitting hole, and the elastic piece is provided with a rectangular plate at the end away from the sliding plate, and the rectangular plate is in fit with the inner side wall of the clamping adjusting box.

[0013] (Three) beneficial effects

[0014] Compared with the prior art, the utility model provides a kind of adjustable tunnel excavation rack, with following beneficial effects:

[0015] 1. The adjustable tunnel excavation gantry significantly improves construction efficiency, the lifting gantry can be flexibly adjusted in height, construction personnel can quickly adjust to the appropriate position according to the height requirements of different construction positions of the tunnel, avoiding construction stagnation caused by height mismatch, and the side wall overturning platform device can widen the working space, when large-section tunnel construction is carried out, the unfolded side platform can enable construction personnel to work at multiple positions simultaneously, multi-region collaborative construction, reducing construction time, compared with the traditional fixed structure gantry, it can quickly adapt to different tunnel specifications, greatly improving the construction progress per unit time, and ensuring efficient progress of the tunnel project.

[0016] 2. The adjustable tunnel excavation gantry has excellent safety, in the design, the fence at the top of the lifting gantry and the anti-skid rubber strip one can effectively prevent construction personnel from falling accidentally during the lifting process of the gantry, avoiding safety hazards caused by height changes, the anti-skid rubber strip two at the top of the side platform also provides anti-skid protection for personnel working in the widened area on the side, reducing the risk of slipping, at the same time, the side wall overturning platform device unfolds to form a stable triangular structure, enhancing the stability of the whole gantry, reducing the safety risks caused by unstable structure, and comprehensively ensuring the personal safety of construction personnel, creating a safe and reliable working environment for tunnel construction. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the adjustable tunnel excavation gantry of the utility model;

[0018] Figure 2 It is a sectional view schematic view of the adjustable tunnel excavation gantry of the utility model;

[0019] Figure 3 It is a schematic view of the main gantry of the utility model;

[0020] Figure 4 It is a schematic view of the bottom of the main gantry of the utility model;

[0021] Figure 5 It is a schematic view of the side wall overturning platform device of the utility model;

[0022] Figure 6 It is a schematic view of the side platform of the utility model;

[0023] Figure 7 It is a schematic view of the clamping piece of the utility model.

[0024] In the figure: 1, main rack; 2, lifting rack; 3, side wall overturning platform device; 4, clamping part; 5, sliding rod; 6, adjusting hole; 7, anti-skid rubber strip one; 8, support column; 9, sliding groove; 10, clamping adjusting box; 11, matching hole; 12, observation hole; 13, connecting hole one; 14, rotating rod; 15, side platform; 16, connecting rod; 17, fixed block; 18, connecting hole two; 19, anti-skid rubber strip two; 20, rotating hole; 21, connecting block; 22, sliding plate; 23, elastic part; 24, clamping block. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0026] Please refer to Figures 1-7 An adjustable tunnel excavation rack, comprising a main rack 1, a lifting rack 2, a side wall overturning platform device 3 and a clamping part 4, the top end of the main rack 1 is provided with the lifting rack 2, the bottom end of the lifting rack 2 is provided with four sliding rods 5 distributed in an axis symmetry, the four sliding rods 5 are slidingly connected with the inside of the clamping part 4 in correspondence, the inside end of the main rack 1 is provided with four clamping parts 4 distributed in an axis symmetry, the clamping part 4 is clamped in correspondence with the sliding rod 5, and the two opposite side walls of the main rack 1 are provided with two side wall overturning platform devices 3 distributed in an axis symmetry, after the excavation rack is pushed into the tunnel, if the construction height needs to be increased, the clamping part 4 needs to be released from the clamping of the lifting rack 2, when the height is optimal, the clamping part 4 is released, so that the clamping part 4 continues to clamp the lifting rack 2, the height adjustment is completed, if the side needs to be widened, the side wall overturning platform device 3 needs to be unfolded, and after being fixed, the side widening construction work can be carried out, the applicable performance is high, and the construction efficiency can be greatly improved.

[0027] Further, the four corners of the bottom end of the main rack 1 are provided with support columns 8 which are distributed in axial symmetry, and the inside of the support column 8 is provided with a sliding groove 9, the sliding groove 9 is open at the top end of the main rack 1, the sliding groove 9 is connected with the sliding rod 5 in sliding mode, the two support columns 8 on the long side of the main rack 1 are provided with a group of observation holes 12 which are distributed at equal intervals at the top end of the opposite side, and the side wall of the support column 8 is provided with a hollow clamping adjusting box 10 at the top end, the inside of the clamping adjusting box 10 is provided with a clamping part 4, and the clamping adjusting box 10 is provided with a matching hole 11 at the center of the side away from the support column 8, the matching hole 11 is concentric with the top end of the observation hole 12 group, the side of the support column 8 away from the clamping adjusting box 10 is provided with two groups of connecting holes 13 which are distributed in axial symmetry, and the two opposite short sides of the main rack 1 are provided with rotating rods 14 which are distributed in axial symmetry, the observation hole 12 is convenient for observing the docking situation of the clamping part 4 and the lifting rack 2, improving the adjustment rate, the support column 8 plays a supporting role, and the support column 8 and the top plate of the main rack 1 are welded with reinforcing ribs to improve the bearing capacity and overall safety performance.

[0028] Further, the side wall of the lifting rack 2 is provided with a group of adjusting holes 6 which are distributed at equal intervals at the bottom end of the sliding rod 5, and the top end of the lifting rack 2 is provided with a ring of fences, the inside of the top end of the lifting rack 2 is provided with an anti-skid rubber strip 7, the adjusting hole 6 of the lifting rack 2 cooperates with the clamping part 4 to play a height adjusting role, and the fence and the anti-skid rubber strip 7 effectively ensure the safety of construction work.

[0029] Further, the side wall turning platform device 3 is composed of three parts, which are side platform 15, two groups of connecting rods 16 and fixed blocks 17 which are distributed in axial symmetry, and the connecting rod 16 and the fixed block 17 are connected in rotation, the end face of the fixed block 17 is provided with a group of connecting holes 18, the connecting holes 18 are connected with the connecting holes 13 through adaptive screws, and the end of the connecting rod 16 away from the fixed block 17 is connected with the side platform 15 in rotation, the side wall turning platform device 3 is attached to the side wall of the main rack 1 when it is not used, and the connecting holes 13 in the side wall of the fixed block 17 and the support column 8 at the bottom end are connected to prevent shaking, when the side wall turning platform device 3 is unfolded for use, the connecting holes 13 in the side wall of the fixed block 17 and the support column 8 at the top end are connected, at this time the side wall turning platform device 3 is in triangular structure, which ensures the safety of the workers working on the side platform 15.

[0030] Further, the side wall of the side platform 15 is provided with a rotating hole 20, the rotating hole 20 is connected with the rotating rod 14 in rotation, and the bottom end of the side platform 15 is provided with two connecting blocks 21 which are distributed in axial symmetry, the connecting blocks 21 are connected with the shaft end of the connecting rod 16 in rotation, and the top end of the side platform 15 is provided with an anti-skid rubber strip 19, the rotating hole 20 and the connecting block 21 both play a connecting role, and the anti-skid rubber strip 19 effectively ensures the safety of the workers working on the side platform 15.

[0031] Further, the clamping part 4 is composed of two parts, namely the sliding plate 22 and the elastic part 23, and the sliding plate 22 and the elastic part 23 are welded at the end face, the sliding plate 22 is provided with a clamping block 24 at the center of the side away from the elastic part 23, the clamping block 24 is correspondingly inserted into the inside of the sliding groove 9 and is matched and clamped with the adjusting hole 6, and the sliding plate 22 is provided with a pull ring at the center of the side corresponding to the elastic part 23, the pull ring is correspondingly matched and slidably connected with the matching hole 11, and the elastic part 23 is provided with a rectangular plate at the end away from the sliding plate 22, the rectangular plate is correspondingly matched with the inside side wall of the clamping and adjusting box 10, the elastic part 23 of the clamping part 4 is always in a compressed state, when the staff pulls the pull ring outward, the elastic part 23 continues to be compressed, and at this time the clamping block 24 is disengaged from the matching and clamping with the adjusting hole 6, so that the lifting rack 2 can be freely adjusted in height, when reaching the appropriate height, the pull ring is released, the elastic force of the elastic part 23 makes the clamping block 24 continue to be matched and clamped with the adjusting hole 6, and the fixing is completed.

[0032] Structural description:

[0033] The main rack 1 is the main support structure of the adjustable tunnel excavation rack, the top of the main rack 1 is provided with the lifting rack 2, the two opposite side walls of the main rack 1 are provided with the side wall overturning platform device 3, and the support columns 8 at the four corners of the bottom of the main rack 1 enhance the stability.

[0034] The lifting rack 2 is located at the top of the main rack 1, the bottom of the lifting rack 2 is provided with four sliding rods 5 matched with the clamping part 4, the height adjustment is realized through the adjusting hole 6 and the clamping part 4, and the top of the lifting rack 2 is provided with a fence and an anti-skid rubber strip 1.

[0035] The side wall overturning platform device 3 is composed of a side platform 15, a connecting rod 16 and a fixed block 17, is matched with the side wall of the main rack 1 when not used, is triangular after being unfolded, and is used for widening the working space.

[0036] The clamping part 4 is composed of the sliding plate 22 and the elastic part 23, the clamping block 24 is matched and clamped with the adjusting hole 6, the elastic part 23 is compressed or rebounds by pulling the pull ring, and the clamping and unlocking of the lifting rack 2 are realized.

[0037] The sliding rod 5 is symmetrically distributed at the bottom of the lifting rack 2, is correspondingly slid in the inside of the clamping part 4, is slidably matched with the sliding groove 9 of the support column 8, and provides the guide for the lifting of the lifting rack 2.

[0038] The adjusting hole 6 is a group of equidistantly distributed holes formed in the side wall of the sliding rod 5, is matched with the clamping block 24 of the clamping part 4, and realizes the adjustment and fixing of the height of the lifting rack 2.

[0039] The anti-skid rubber strip 1 is arranged at the top inside of the lifting rack 2, can increase the friction, effectively prevents the construction personnel from slipping down when walking or working on the rack, and guarantees the safety.

[0040] Support column 8: Support column 8 is located at the bottom of the four corners of the main rack 1, and the inside has a sliding groove 9 matched with the sliding rod 5, and is welded with the top plate of the main rack 1 to form a reinforcing rib, which plays a supporting and enhancing the overall stability;

[0041] Slide groove 9: Slide groove 9 is opened in the inside of support column 8, and the top end of the main rack 1 is an open structure, which is matched with the sliding rod 5 to provide a sliding track for the lifting of the lifting rack 2;

[0042] Clamping adjustment box 10: Clamping adjustment box 10 is a hollow box arranged on the top of the side wall of the observation hole 12 corresponding to the support column 8, and the inside is placed with the clamping part 4 to provide space for the movement of the clamping part 4;

[0043] Matching hole 11: Matching hole 11 is opened in the center of the side of clamping adjustment box 10 away from support column 8, and is concentric with the top end of a group of observation holes 12, which is matched with the pull ring of clamping part 4;

[0044] Observation hole 12: Observation hole 12 is a group of equidistantly distributed holes on the top end of the opposite side of the two support columns 8 of the long side of the main rack 1, which is convenient for observing the butt joint condition of the clamping part 4 and the lifting rack 2, and improves the adjustment efficiency;

[0045] Connecting hole one 13: Connecting hole one 13 is two groups of axially symmetrical distributed holes on the side of support column 8 away from clamping adjustment box 10, which is matched with the connecting hole two 18 of fixed block 17 through adaptive screw, and fixes the side wall flip platform device 3;

[0046] Rotating rod 14: Rotating rod 14 is axially symmetrical distributed on the two opposite short sides of the main rack 1, and is matched with the rotating hole 20 of the side platform 15 to provide rotating support for the unfolding and folding of the side wall flip platform device 3;

[0047] Side platform 15: Side platform 15 is the main working platform of the side wall flip platform device 3, and has anti-skid rubber strip two 19 on the top, which is connected with other components through rotating hole 20 and connecting block 21;

[0048] Connecting rod 16: Connecting rod 16 is axially symmetrical distributed in two groups, and the two ends are respectively connected with fixed block 17 and side platform 15, which plays a connecting and supporting role when the side wall flip platform device 3 is unfolded and folded;

[0049] Fixed block 17: Fixed block 17 has connecting hole two 18 on the end face, which is matched with connecting hole one 13 through adaptive screw, so as to realize the connection and fixation of side wall flip platform device 3 and main rack 1;

[0050] Connecting hole two 18: Connecting hole two 18 is a group of holes opened on the end face of fixed block 17, which is matched with connecting hole one 13 through adaptive screw, and is used for fixing the position of side wall flip platform device 3 in different states;

[0051] Anti-skid rubber strip two 19: Anti-skid rubber strip two 19 is arranged on the top of the side platform 15, which can increase the friction and prevent the construction personnel from falling down when working on the side platform 15, thereby ensuring the construction safety;

[0052] Rotary hole 20: The rotary hole 20 is arranged on the side wall of the side platform 15 and is in rotary connection with the rotary rod 14, so that the side platform 15 can rotate around the rotary rod 14, thereby realizing the unfolding and folding of the side wall turnover platform device 3;

[0053] Connecting block 21: The connecting block 21 is arranged on the bottom of the side platform 15 and is in rotary connection with the shaft end of the connecting rod 16, thereby playing a connecting role during the unfolding and folding of the side wall turnover platform device 3;

[0054] Sliding plate 22: The sliding plate 22 is a part of the clamping piece 4 and is welded with the elastic piece 23, one side of the sliding plate 22 is provided with a clamping block 24, and the other side is provided with a pull ring, the clamping block 24 is separated from the adjusting hole 6 by pulling the pull ring;

[0055] Elastic piece 23: The elastic piece 23 is welded with the sliding plate 22 and is always in a compressed state, the elastic force of the elastic piece 23 makes the clamping block 24 be clamped with the adjusting hole 6, the clamping can be released by compressing the elastic piece 23 through an external force, thereby realizing the height adjustment;

[0056] Clamping block 24: The clamping block 24 is arranged on the center of the side of the sliding plate 22 away from the elastic piece 23 and is in clamping connection with the adjusting hole 6 through the sliding groove 9, thereby realizing the fixation of the lifting stand 2.

[0057] Working principle: according to the diagram, the adjustable tunnel excavation rack is correctly installed, when using the adjustable tunnel excavation rack, first, the rack is pushed to the tunnel construction position, when the height of the rack needs to be adjusted, the construction personnel pull the pull ring of the sliding plate 22 of the clamping part 4, at this time, the elastic part 23 is further compressed, the clamping block 24 is disengaged from the adjusting hole 6 of the side wall of the sliding rod 5 at the bottom of the lifting rack 2, because the sliding groove 9 of the supporting column 8 at the bottom of the main rack 1 is in sliding cooperation with the sliding rod 5, the lifting rack 2 can be freely lifted under the guidance of the sliding groove 9, the construction personnel adjust the lifting rack 2 to the appropriate position according to the actual construction height requirement, then release the pull ring, the elastic part 23 pushes the sliding plate 22 under the action of the elastic force, so that the clamping block 24 is re-engaged with the adjusting hole 6, the height fixing of the lifting rack 2 is completed, during the adjustment process, the workers can observe the docking condition of the clamping part 4 and the lifting rack 2 through the observation hole 12 on the supporting column 8, so as to improve the adjustment rate, if the side of the rack needs to be widened, the construction personnel first release the connection between the fixed block 17 and the connecting hole one 13 at the bottom of the side wall of the supporting column 8, unfold the side wall flip platform device 3, one end of the connecting rod 16 in the side wall flip platform device 3 is rotationally connected with the fixed block 17, and the other end is rotationally connected with the side platform 15, after the fixed block 17 is reconnected with the connecting hole one 13 at the top of the side wall of the supporting column 8 through the adaptive screw, the side wall flip platform device 3 forms a triangular structure, the stability is enhanced, the side platform 15 is rotationally connected with the rotating rod 14 of the short side of the main rack 1 through the rotating hole 20, and the bottom connecting block 21 is rotationally connected with the shaft end of the connecting rod 16, so that the unfolding process is smooth, the unfolded side platform 15 provides wider working space for construction, the anti-skid rubber strip two 19 at the top of the side platform 15 can effectively ensure the safety of the workers working on it, and the fence at the top of the lifting rack 2 and the anti-skid rubber strip one 7 also provide safety protection for the workers working on the lifting rack 2, the whole rack works cooperatively through the cooperation of various parts, and meets different tunnel construction requirements.

[0058] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An adjustable tunnel excavation platform, comprising a main platform (1), a lifting platform (2), a sidewall tilting platform device (3), and a clamping component (4), characterized in that: The top end of the main frame (1) is provided with a lifting platform (2), and the bottom end of the lifting platform (2) is provided with four sliding rods (5) distributed symmetrically. The four sliding rods (5) are connected in sliding fit inside the clamping member (4). The inner end of the main frame (1) is provided with four clamping members (4) distributed symmetrically. The clamping members (4) are engaged with the sliding rods (5). The two opposite side walls of the main frame (1) are provided with two side wall flipping platform devices (3) distributed symmetrically.

2. The adjustable tunnel excavation platform according to claim 1, characterized in that: The main frame (1) has four symmetrically distributed support columns (8) at its bottom corners, and each support column (8) has a groove (9) inside. The groove (9) is open at the top of the main frame (1), and it is slidably connected to the sliding rod (5). The two support columns (8) on the long side of the main frame (1) have a set of equally spaced observation holes (12) at their top ends, and the top ends of the side walls of the support columns (8) corresponding to the observation holes (12) are hollow. The clamping adjustment box (10) is fitted with a clamping component (4) inside. The clamping adjustment box (10) has a mating hole (11) at the center of the side away from the support column (8). The mating hole (11) is concentric with the top of the observation hole (12). The support column (8) has two sets of axially symmetrically distributed connecting holes (13) on the side away from the clamping adjustment box (10). The main frame (1) has axially symmetrically distributed rotating rods (14) on the two opposite short sides.

3. The adjustable tunnel excavation platform according to claim 2, characterized in that: The sliding rod (5) at the bottom end of the lifting platform (2) has a set of equal-spaced adjustment holes (6) on its side wall, and a fence is provided on the side of the top end of the lifting platform (2), and an anti-slip rubber strip (7) is provided inside the top end of the lifting platform (2).

4. The adjustable tunnel excavation platform according to claim 1, characterized in that: The side wall flipping platform device (3) consists of three parts: a side platform (15), two sets of axially symmetrically distributed connecting rods (16) and a fixing block (17). The connecting rods (16) and the fixing block (17) are rotatably connected. The end face of the fixing block (17) is provided with a set of connecting holes two (18). The connecting holes two (18) are connected to the connecting holes one (13) by means of an adapter screw. The end of the connecting rod (16) away from the fixing block (17) is rotatably connected to the side platform (15).

5. An adjustable tunnel excavation platform according to claim 4, characterized in that: The side platform (15) has a rotating hole (20) on its side wall. The rotating hole (20) is rotatably connected to the rotating rod (14). The bottom end of the side platform (15) has two axially symmetrically distributed connecting blocks (21). The connecting blocks (21) are rotatably connected to the shaft end of the connecting rod (16). The top end of the side platform (15) has a second anti-slip rubber strip (19).

6. An adjustable tunnel excavation platform according to claim 2, characterized in that: The clamping component (4) consists of two parts: a sliding plate (22) and an elastic component (23). The end faces of the sliding plate (22) and the elastic component (23) are welded together. A clamping block (24) is provided at the center of the side of the sliding plate (22) away from the elastic component (23). The clamping block (24) is inserted into the sliding groove (9) and engages with the adjustment hole (6). A pull ring is provided at the center of the side of the sliding plate (22) corresponding to the elastic component (23). The pull ring is slidably engaged with the mating hole (11). A rectangular plate is provided at the end of the elastic component (23) away from the sliding plate (22). The rectangular plate is fitted against the inner side wall of the clamping adjustment box (10).

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