Tunnel construction rack

Abstract

The utility model discloses a tunnel construction rack which comprises a construction platform, a construction rack assembly is arranged at the bottom of the construction platform, and an adjusting rack assembly is arranged on the construction rack assembly. The adjusting frame assembly comprises an I-shaped frame, adjusting sleeves are fixedly arranged at the four corners of the I-shaped frame through concave fixing pieces correspondingly, first lifting legs are arranged in cavities of the four adjusting sleeves in a sleeved mode correspondingly, a plurality of rolling wheels are arranged on the inner sides of the fixing pieces, and the rolling wheels are clamped to the two transverse sides of the scaffold assembly. A motor is arranged at one end of the top of the I-shaped frame, a hinge wheel is arranged on an output shaft of the motor, a single rope is wound around the hinge wheel, the two ends of the rope are fixedly arranged on the two vertical sides of the bottom of the scaffold assembly, and the adjusting frame assembly pulls the rope to move at the bottom of the scaffold assembly through the motor. The device has the advantages of being free of frequent disassembly and assembly, convenient to move, suitable for different tunnel section sizes and the like.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, specifically a tunnel construction platform. Background Technology

[0002] Tunnel construction scaffolds are temporary support structures used for pouring invert concrete, installing reinforcing bars, and other related operations during tunnel construction. They are typically composed of steel components and are characterized by being detachable and reusable.

[0003] Currently, tunnel construction rigs still face numerous problems in practical applications, particularly in terms of assembly, disassembly, and adaptability to different tunnel cross-sectional dimensions. These issues severely restrict construction efficiency and affect construction quality. On one hand, the assembly and disassembly processes are complex and extremely time-consuming. Traditional tunnel construction rigs consist of numerous steel components, requiring individual splicing and fixing during on-site construction. This complex assembly method not only consumes significant manpower and time but also easily leads to disjointed construction processes. Furthermore, traditional rigs are bulky, lack convenient moving devices, and have poor mobility, making them difficult to move quickly and flexibly on the construction site and transfer between different construction areas, further slowing down the overall progress of tunnel construction. On the other hand, traditional rigs are poorly adaptable to different cross-sectional dimensions. When cross-sectional changes occur, large-scale modifications are required, involving the removal and addition of steel components, which is time-consuming and labor-intensive. Repeated disassembly and installation can affect the stability of the rig. If the rig's fit with the construction cross-section is poor after installation, rework will occur. In addition, frequent disassembly and installation accelerate component wear, reduce rig lifespan, and restrict construction efficiency.

[0004] Therefore, this application provides a tunnel construction platform to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this utility model is to provide a tunnel construction platform that solves the problem of poor mobility caused by the need for assembly and disassembly of existing platforms.

[0006] To solve the above-mentioned technical problems, this utility model provides a tunnel construction platform, including a construction platform, a construction frame assembly at the bottom of the construction platform, and an adjustment frame assembly on the construction frame assembly;

[0007] The adjustment frame assembly includes an I-shaped frame, with adjustment sleeves fixedly installed at the four corners of the I-shaped frame by concave fixing pieces. First lifting legs are respectively fitted into the cavities of the four adjustment sleeves. Multiple rollers are provided on the inner side of the fixing pieces, and the multiple rollers engage with the lateral sides of the construction frame assembly.

[0008] The frame is equipped with a winch self-traction linear mechanism, and the adjustment frame assembly moves at the bottom of the construction frame assembly through the winch self-traction linear mechanism;

[0009] The winch self-traction linear mechanism includes:

[0010] The motor is fixedly mounted on the top of the I-frame;

[0011] The hinge wheel is fixedly mounted on the output shaft of the motor;

[0012] The rope is fixed at both ends on the vertical sides of the bottom of the construction frame assembly, and the middle part of the rope is wound around the outer periphery of the hinge wheel according to the preset number of turns.

[0013] The motor rotates the hinge wheel to raise and lower the ropes on both sides of the hinge wheel, driving the I-frame to move along the rope rail.

[0014] A further improvement of the present invention is that the construction frame assembly includes a slide rail frame set at the bottom edge of the construction platform. The longitudinal section of the slide rail frame is concave, and the side of the slide rail frame is recessed inward to form a slide rail groove. Lifting sleeves are fixedly set at each corner of the slide rail frame, and a second lifting leg is respectively installed through each lifting sleeve.

[0015] A further improvement of this utility model is that the rollers on the fixing plate are arranged in two rows.

[0016] A further improvement of this utility model is that a bearing plate is provided at the bottom of the slide rail groove, and two rows of rollers are clamped on the bearing plate. The rollers can roll along the length of the slide rail groove to achieve linear motion.

[0017] A further improvement of the present invention is that the I-frame includes two nested T-shaped tubes, and multiple adjustment holes are evenly provided at the nested positions of the two T-shaped tubes, which are fixed by pins.

[0018] A further improvement of this utility model is that a protective barrier is installed on the side of the construction platform, and the longitudinal height of the first lifting leg and the second lifting leg does not exceed the height of the protective barrier, so as to prevent affecting the tunnel construction.

[0019] A further improvement to the technical solution of this utility model is that two reinforcing ribs are provided in the middle of the slide rail frame.

[0020] A further improvement of this utility model is that the two ends of the rope are connected to the two vertical frames of the slide rail frame.

[0021] A further improvement of this utility model is that the I-beam frame is located below the slide rail frame and the rope.

[0022] A further improvement of the present invention is that: multiple adjustment holes are respectively provided through the sides of the first lifting leg and the second lifting leg; the adjustment sleeve and the lifting sleeve are respectively adapted to the first lifting leg and the second lifting leg through the adjustment holes; the adjustment holes and the adapted adjustment holes cooperate to fix the longitudinal height of the first lifting leg and the second lifting leg.

[0023] By adopting the above technical solution, this utility model has the following beneficial effects:

[0024] 1. This utility model provides a tunnel construction platform that, through the cooperation of a construction frame assembly and an adjusting frame assembly, eliminates the need for frequent disassembly and assembly of the platform, thus facilitating its movement. Specifically, during tunnel construction, after completing a portion of the construction process, the platform needs to be moved to proceed with subsequent construction. With this utility model, after completing the construction of the first section, only the second lifting leg of the construction frame assembly needs to be retracted. At this point, the adjusting frame assembly provides support for the construction frame assembly, and a motor-driven cable moves the construction frame assembly to the next section construction position. Upon reaching the new position, the second lifting leg is lowered while the first lifting leg is raised, restoring the construction frame assembly to its supported state. The adjusting frame assembly then follows to the location of the construction frame assembly, allowing subsequent construction work to continue. This utility model's tunnel construction platform differs from traditional platforms that require frequent disassembly and assembly, significantly improving the platform's movement efficiency, reducing manpower consumption during construction, and providing a more convenient and efficient operating method for tunnel construction.

[0025] 2. This utility model provides a tunnel construction platform. The adjustable frame assembly, through the telescopic structure of the I-beam frame, allows the platform to be well-suited to different tunnel cross-sectional dimensions. Specifically, the adjustable frame assembly of this utility model achieves precise adjustment of its lateral width by changing the lateral relative position between the two T-shaped tubes on the I-beam frame. During the movement of the construction platform, the width of the adjustable frame assembly can be adjusted as needed. Furthermore, the first and second lifting legs, with their longitudinally adjustable design, can flexibly adjust the longitudinal depth of the adjustable frame assembly. This enhances the platform's adaptability to different tunnel cross-sectional dimensions, providing reliable equipment support for the smooth progress of tunnel construction and improving the convenience and adaptability of tunnel construction.

[0026] 3. The present invention provides a tunnel construction platform. This platform increases the contact area with the ground by using four second lifting legs on the construction frame assembly and four first lifting legs on the adjustment frame assembly, effectively distributing the load, enhancing the stability of the platform during construction, and reducing the risk of swaying and tilting. At the same time, the support position and height of the four first lifting legs and the four second lifting legs can be flexibly adjusted, improving the platform's adaptability to different tunnel cross-sectional dimensions and terrain conditions, broadening its application range, and meeting diverse construction needs. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of an overall tunnel construction platform;

[0028] Figure 2 A schematic diagram of the overall structure of a tunnel construction platform;

[0029] Figure 3 This is a schematic diagram of the adjustment frame assembly in this utility model;

[0030] Figure 4 This is a structural schematic diagram of the construction frame assembly in this utility model;

[0031] Figure 5 This is a schematic diagram of the structure of the motor, winch, and rope in this utility model;

[0032] Figure 6 This is a schematic diagram of the structure of the I-frame in this utility model;

[0033] Figure 7 This is a schematic diagram of the structure of the fixing plate, adjusting sleeve and roller in this utility model;

[0034] Figure 8 This is a schematic diagram of the slide rail groove, bearing plate, and roller of this utility model;

[0035] Figure 9 for Figure 8 An enlarged schematic diagram of part A in the middle;

[0036] Figure 10 for Figure 5 Enlarged diagram of part B.

[0037] Reference numerals: 1. Construction frame assembly; 11. Construction platform; 111. Protective barrier; 12. Slide rail frame; 13. Slide rail groove; 131. Bearing plate; 14. Lifting sleeve; 15. Second lifting leg; 16. Reinforcing rib; 17. Adjustment hole; 18. Adaptive adjustment hole; 2. Adjustment frame assembly; 21. I-beam frame; 211. T-tube; 22. Fixing plate; 23. Adjustment sleeve; 24. Cavity; 25. First lifting leg; 26. Roller; 27. Motor; 271. Hinge wheel; 272. Rope. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] The present invention will be further explained below with reference to specific embodiments.

[0042] Please see Figures 1-5 , Figures 8-10This utility model provides a technical solution: a tunnel construction platform, including a construction platform 11, a construction frame assembly 1 at the bottom of the construction platform 11, and an adjustment frame assembly 2 on the construction frame assembly 1; the adjustment frame assembly 2 includes an I-beam frame 21, with adjustment sleeves 23 fixedly mounted at the four corners of the I-beam frame 21 by concave fixing pieces 22, and first lifting legs 25 respectively fitted into the cavities 24 of the four adjustment sleeves 23; multiple rollers 26 are arranged on the inner side of the fixing pieces 22, and the multiple rollers 26 engage with the lateral sides of the construction frame assembly 1; the I-beam frame 21 is equipped with a winch self-traction linear mechanism. The adjusting frame assembly 2 moves at the bottom of the construction frame assembly 1 via a winch self-traction linear mechanism. The winch self-traction linear mechanism includes: a motor 27, fixedly installed on the top of the I-frame 21; a hinge wheel 271, fixedly installed on the output shaft of the motor 27; and a rope 272, with both ends of the rope 272 fixedly set on the vertical sides of the bottom of the construction frame assembly 1, and the middle part of the rope 272 wound around the outer periphery of the hinge wheel 271 according to a preset number of turns. The motor 27 rotates the hinge wheel 271 to release and retract the rope 272 on both sides of the hinge wheel 271, driving the I-frame 21 to move along the rope rail. The rope 272 can be wound multiple times around the hinge wheel 271. This multi-turn winding increases the friction between the rope 272 and the hinge wheel 271, effectively preventing the motor 27 from spinning freely and ensuring stable pulling. It is important to note that the rope 272 must always be taut to avoid slippage. Alternatively, the hinge wheel 271 can be replaced with a sprocket, and the rope 272 with a chain. The tight meshing of the chain and sprocket drives the component forward, similarly avoiding the problem of the motor 27 spinning freely and providing reliable power transmission for the movement of the adjustment frame assembly 2. When subsequent construction is required after the completion of the previous tunnel section, this tunnel construction platform can efficiently advance the construction process based on the following operating procedures. First, using the adjusting frame assembly 2 as a support structure, the motor 27 is started. The hinge wheel 271 at the front end of the motor 27 then rotates, winding the rope 272. Under the tension of the rope 272, the construction frame assembly 1 and the adjusting frame assembly 2 are connected by the engagement of the rollers 26, causing the rollers 26 to roll along both sides of the construction frame assembly 1, thereby moving the construction frame assembly 1 to the next tunnel section position. After the construction frame assembly 1 is stably supported on the ground by its own lifting legs, the first lifting leg 25 of the adjusting frame assembly 2 is retracted, and the motor 27 is started again. The motor 27 drives the hinge wheel 271 to rotate, pulling the adjusting frame assembly 2 to move at the bottom of the construction frame assembly 1, so that it follows to the next tunnel section. Considering the large size and weight of traditional tunnel rigs, each disassembly and assembly requires a large number of construction workers and a lot of time, resulting in a long construction cycle and seriously slowing down the construction progress. In contrast, this tunnel rig, with its flexible and convenient mobile system, can move smoothly between different construction sections, reducing the financial investment in equipment maintenance, saving a lot of manpower and time, reducing construction interruptions, shortening the construction cycle, ensuring continuous and orderly tunnel construction, and improving the construction progress.

[0043] Please see Figure 2 , Figure 4 This utility model provides a technical solution: a tunnel construction platform. The construction platform assembly 1 includes a slide rail frame 12 disposed at the bottom edge of the construction platform 11. The longitudinal section of the slide rail frame 12 is concave, and the sides of the slide rail frame 12 are recessed inward to form a slide rail groove 13. Lifting sleeves 14 are fixedly disposed at each corner of the slide rail frame 12, and a second lifting leg 15 is respectively disposed through each lifting sleeve 14. The concave section design of the slide rail frame 12, in cooperation with the multiple rollers 26 on the adjusting frame assembly 2, enables the rollers 26 on the adjusting frame assembly 2 to accurately engage in the slide rail groove 13, providing reliable guiding constraints for the relative movement between the construction platform assembly 1 and the adjusting frame assembly 2, ensuring a smooth and accurate movement process. In addition, by adjusting the second lifting legs 15 of the construction platform assembly 1, the support state of the construction platform assembly 1 is changed. Before the movement operation, the second lifting legs 15 are retracted, facilitating the movement of the construction platform assembly 1 to the designated construction section position under the drive of the adjusting frame assembly 2.

[0044] Please see Figure 2 , Figure 7 This utility model provides a technical solution: a tunnel construction platform, wherein the rollers 26 on the fixing plate 22 are distributed in two rows. The two-row distribution of the rollers 26 is used to engage with the slide rail groove 13 of the construction frame assembly 1.

[0045] Please see Figure 2 , Figures 7-9 This utility model provides a technical solution: a tunnel construction platform, wherein the slide rail groove 13 includes a support plate 131 at the bottom, and two rows of rollers 26 are clamped in the support plate 131. The rollers 26 roll along the support plate 131 to achieve linear movement. The upper row of rollers 26 is arranged inside the slide rail groove 13, above the support plate 131, while the lower row of rollers 26 is arranged below the support plate 131, so that the rollers 26 and the slide rail frame 12 can be precisely engaged, providing effective constraint for the linear movement of the rollers 26. This ensures the stability of the linear movement of the adjustment frame assembly 2 relative to the construction frame assembly 1 during construction, avoids displacement deviation caused by the offset of the rollers 26, and improves the accuracy and reliability of the tunnel construction platform position adjustment.

[0046] Please see Figures 2-3 , Figure 6This utility model provides a technical solution: a tunnel construction platform, wherein the frame 21 includes two nested T-shaped tubes 211, with multiple adjustment holes 17 evenly spaced at the nesting positions of the two T-shaped tubes 211, and the adjustment holes 17 are fixed by pins. During tunnel construction, to meet different working spaces and construction requirements, the pins can be pulled out as needed to adjust the nesting depth of the two T-shaped tubes 211. After adjustment, the pins are inserted back into the selected adjustment holes 17 and fixed, thereby changing the lateral distance of the adjustment frame assembly 2. The nested design of the two T-shaped tubes 211 improves the adaptability of the adjustment frame assembly 2 to different tunnel cross-sectional dimensions, avoiding construction limitations caused by fixed platform dimensions.

[0047] Please see Figure 2 , Figure 4 This utility model provides a technical solution: a tunnel construction platform 11 with protective guardrails 111 installed on the side of the platform 11. The guardrails 111 serve to protect construction workers from falling. Due to the complex tunnel construction environment and the existence of height differences, construction workers are at risk of falling. The protective guardrails 111 are vertically installed on the side of the construction platform 11, which can effectively protect the lives of construction workers.

[0048] Please see Figure 2 , Figure 5 This utility model provides a technical solution: a tunnel construction platform, in which two transverse reinforcing ribs 16 are arranged in the middle of the slide rail frame 12. During tunnel construction, the construction frame assembly 1 needs to support the weight of the construction platform 11, construction personnel, equipment, etc. As a key load-bearing component, the slide rail frame 12 bears a large load. The design of the two parallel reinforcing ribs 16 can effectively enhance the overall structural strength and stability of the slide rail frame 12, distribute the load, and reduce the risk of frame deformation.

[0049] Please see Figure 5 This utility model provides a technical solution: a tunnel construction platform, with the two ends of a rope 272 connected to the two vertical sidewalls of a slide rail frame 12. When it is necessary to move the construction platform assembly 1, the motor 27 drives the hinge wheel 271 to rotate, and the rope 272, under the traction of the hinge wheel 271, moves the slide rail frame 12 and the entire construction platform assembly 1.

[0050] Please see Figures 2-5 This utility model provides a technical solution: a tunnel construction platform, in which the I-beam frame 21 is located below the slide rail frame 12. In the overall structural system of the tunnel construction platform, the I-beam frame 21, as a key component of the adjusting frame assembly 2, works in conjunction with the slide rail frame 12 and the rope 272. The I-beam frame 21 primarily bears and transmits the load from the slide rail frame 12. Its lower position allows it to provide stable support and a guiding reference for the slide rail frame 12 through its own structural characteristics when the construction platform moves.

[0051] Please see Figures 2-4 This utility model provides a technical solution: a tunnel construction platform, wherein multiple adjustment holes 17 are respectively provided through the sides of the first lifting leg 25 and the second lifting leg 15, and the sides of the adjustment sleeve 23 and the lifting sleeve 14 are respectively adapted to the first lifting leg 25 and the second lifting leg 15 through-holes 18, and the adjustment holes 17 and the adapted adjustment holes 18 cooperate to fix the longitudinal height of the first lifting leg 25 and the second lifting leg 15. In actual construction scenarios, the height of the platform can be flexibly adjusted according to the height requirements of different construction sections of the tunnel. In specific operation, first loosen the pins used for fixing on the adjusting sleeve 23 and the lifting sleeve 14, so that the first lifting leg 25 and the second lifting leg 15 can slide freely in the adjusting sleeve 23 and the lifting sleeve 14. According to the required height, move the first lifting leg 25 and the second lifting leg 15 to the appropriate position so that the adjusting hole 17 and the matching adjusting hole 18 are precisely aligned. Then, pass the pin through the aligned adjusting hole 17 and the matching adjusting hole 18 and tighten it, thereby firmly locking the first lifting leg 25 and the second lifting leg 15 at the corresponding height position, ensuring the overall stability and safety of the construction platform.

[0052] The working principle of the technical solution provided by this utility model is as follows:

[0053] Installation steps: Two T-shaped tubes 211 are spliced ​​together to form an I-frame 21. First lifting legs 25 are fitted into the adjusting sleeves 23 at the four corners of the I-frame 21, and the first lifting legs 25 are initially fixed according to the current tunnel cross-section height and position. Next, a motor 27 is fixedly installed on the I-frame 21. Then, the double-row rollers 26 inside the fixing plate 22 are engaged between the bearing plates 131. The rope 272 is wound multiple times around the hinge wheel 271 at the front end of the motor 27, and both ends of the rope 272 are fixed to the vertical sides of the slide rail frame 12. Second lifting legs 15 are fitted into the lifting sleeves 14 at the four corners of the slide rail frame 12, and the second lifting legs 15 are initially fixed according to the current tunnel cross-section height and position. Afterwards, a construction platform 11 is installed on the slide rail frame 12, and protective barriers 111 are vertically installed on both sides of the construction platform 11. The installation is now complete.

[0054] Usage Procedure: First, retract the second lifting leg 15 on the construction frame assembly 1 and secure it with a pin. At this time, the first lifting leg 25 of the adjusting frame assembly 2 acts as a support structure, providing stable support for the entire platform. Then, start the motor 27. The hinge wheel 271 at the front end of the motor 27 begins to rotate. The hinge wheel 271 drives the rope 272 to move laterally by winding. Under the tension of the rope 272, the construction frame assembly 1 moves in the designated direction on the adjusting frame assembly 2. When the construction frame assembly 1 moves to the next tunnel construction section, stop the motor 27 and lower the second lifting leg. Lower leg 15 and secure it again with pins. At this point, construction frame assembly 1 is in contact with and supported by the second lifting leg 15, achieving stable support. Next, retract the first lifting leg 25 on the adjusting frame assembly 2, securing it with pins as well. Start motor 27 again, using the action of the front hinge wheel 271 on the rope 272 to move the adjusting frame assembly 2 towards the construction frame assembly. When the adjusting frame assembly 2 reaches the next tunnel construction section, stop motor 27, release the first lifting leg 25, and secure it with pins, ensuring the adjusting frame assembly 2 is also stably supported on the ground. Furthermore, during actual tunnel construction, the distance between the two T-shaped frames on the I-beam 21 can be adjusted according to different tunnel terrains, thereby flexibly changing the width of the adjusting frame assembly 2 to better adapt to construction needs. It should be noted that the relative movement sequence between the adjusting frame assembly 2 and the construction frame assembly 1 can be adjusted according to the specific tunnel construction conditions and is not entirely limited to the above steps.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A tunnel construction platform, characterized in that, The construction platform (11) is provided with a construction frame assembly (1) at the bottom of the construction platform (11) and an adjustment frame assembly (2) is provided on the bottom surface of the construction frame assembly (1). The adjustment frame assembly (2) includes an I-shaped frame (21). The four corners of the I-shaped frame (21) are respectively fixed with adjustment sleeves (23) by concave fixing pieces (22). The first lifting legs (25) are respectively fitted into the cavities (24) of the four adjustment sleeves (23). Multiple rollers (26) are provided on the inner side of the fixing pieces (22). The multiple rollers (26) engage with the transverse sides of the construction frame assembly (1). The frame (21) is equipped with a winch self-traction linear mechanism, and the adjustment frame assembly (2) moves at the bottom of the construction frame assembly (1) through the winch self-traction linear mechanism; The winch self-traction linear mechanism includes: The motor (27) is fixedly installed on the top of the I-frame (21); The hinge wheel (271) is fixedly mounted on the output shaft of the motor (27); The rope (272) is fixed at both ends on the vertical sides of the bottom of the construction frame assembly (1), and the middle part of the rope (272) is wound around the outer periphery of the hinge wheel (271) according to the preset number of turns; The motor (27) rotates the hinge wheel (271) to release and retract the ropes (272) on both sides of the hinge wheel (271), driving the frame (21) to move along the rope rail.

2. The tunnel construction platform according to claim 1, characterized in that, The construction frame assembly (1) includes a slide rail frame (12) set at the bottom edge of the construction platform (11). The longitudinal section of the slide rail frame (12) is concave. The slide rail frame (12) has a slide rail groove (13) formed by the inward recess of the side. Lifting sleeves (14) are fixedly set at each corner of the slide rail frame (12). A second lifting leg (15) is respectively installed through each lifting sleeve (14).

3. A tunnel construction platform according to claim 1, characterized in that, The rollers (26) on the fixed plate (22) are arranged in two rows.

4. A tunnel construction platform according to claim 2, characterized in that, The slide rail (13) includes a support plate (131) at the bottom, and two rows of rollers (26) are clamped in the support plate (131). The rollers (26) roll along the support plate (131) to achieve linear motion.

5. A tunnel construction platform according to claim 1, characterized in that, The frame (21) includes two nested T-shaped tubes (211). Multiple adjustment holes (17) are evenly opened at the nested positions of the two T-shaped tubes (211). The adjustment holes (17) are fixed by pins.

6. A tunnel construction platform according to claim 2, characterized in that, A protective barrier (111) is installed on the side of the construction platform (11). The longitudinal height of the first lifting leg (25) and the second lifting leg (15) does not exceed the height of the protective barrier (111) to prevent it from affecting the tunnel construction.

7. A tunnel construction platform according to claim 2, characterized in that, Two horizontal reinforcing ribs (16) are set in the middle of the slide rail frame (12).

8. A tunnel construction platform according to claim 1, characterized in that, The two ends of the rope (272) are connected to the two vertical frames of the slide rail frame (12).

9. A tunnel construction platform according to claim 8, characterized in that, The I-beam frame (21) is located below the slide rail frame (12).

10. A tunnel construction platform according to claim 1, characterized in that, Multiple adjustment holes (17) are provided through the sides of the first lifting leg (25) and the second lifting leg (15). The adjustment sleeve (23) and the lifting sleeve (14) are respectively adapted to the first lifting leg (25) and the second lifting leg (15) through the adjustment holes (18). The adjustment holes (17) and the adaptation adjustment holes (18) cooperate to fix the longitudinal height of the first lifting leg (25) and the second lifting leg (15).

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