Tunnel construction platform vehicle and construction method

Abstract

The present invention discloses a tunnel construction platform vehicle and a construction method, comprising: a vehicle chassis system, a vertical lifting system, a construction platform and a bearing mechanism; the vertical lifting system and the bearing mechanism are respectively arranged on the vehicle chassis system, and the construction platform is respectively connected to the vertical lifting system and the bearing mechanism; the vertical lifting system is used to control the adjustment of the working direction of the construction platform in the tunnel; the bearing mechanism is used to extend and retract according to the actual working conditions and carry the construction platform. Advantages: It can realize the cross-belt secondary reinforcement operation of the belt slag discharge tunnel, satisfying the convenient construction under the condition of ensuring the continuous operation of the belt. At the same time, it also has the construction capability for the arch part of the tunnel, which greatly solves the safety hazards and efficiency problems existing in the original high-altitude tunnel operation, and ultimately shows the goal of fast, efficient and safe operation.

Description

Technical Field

[0001] The invention relates to a tunnel construction platform vehicle and a construction method, belonging to the technical field of high-altitude operations in tunnels. Background Art

[0002] In the field of tunnel construction, belt-transported slag tunnels squeezed by ground stress urgently need secondary reinforcement. The reinforcement parts include anchor rods, steel mesh and I-beam support beams. In order to ensure the continuity of belt-transported slag discharge in the tunnel, construction workers often use scaffolding to assist high-altitude operations. After the anchor rods and other equipment are installed in a specific area, the scaffolding is dismantled and moved to other construction areas. However, with the continuous increase in tunnel excavation progress, this method of manual scaffolding has the disadvantages of cumbersome disassembly and assembly, low safety factor and affected construction efficiency. It is extremely unfavorable for the rapid implementation of multi-point sporadic reinforcement projects in long-line tunnels.

[0003] Therefore, how to develop a platform vehicle that can adapt to the reinforcement work in the belt slag discharge tunnel and can meet the needs of multi-point rolling construction in long-line and cramped spaces, and supplemented by a construction method that is suitable for the tunnel layout environment, has naturally become a difficult problem that needs to be solved urgently by technical personnel in this field.

[0004] At present, since the belt-type slag tunnel requires the construction platform to have the characteristics of being able to cross the belt, having super bearing capacity, being able to be retracted and extended freely, and having a fast moving speed, the existing technology cannot meet the above conditions at the same time. The reasons include: First, the purely vertical lifting platform facilities cannot complete the operation of crossing the belt; second, although the gantry-type construction platform vehicle can meet the operation requirements of crossing the belt, it has defects such as being too large, inconvenient to move, and having too many branch platforms, which makes it difficult to adapt to the sporadic reinforcement projects of long-line tunnels; third, the high-altitude telescopic platform vehicle that can be moved laterally or in multiple directions can meet the tunnel operation requirements such as crossing the belt and moving quickly, but its laterally extended construction platform lacks a vertical support structure, which makes this type of operation platform unsuitable for the vibration and impact force generated by small equipment such as handheld air guns during construction, and its too small platform area cannot meet the needs of multiple people and multiple equipment working at the same time. In summary, the existing technology cannot fully meet the construction requirements of secondary reinforcement of belt-type slag tunnels, and the operation platform of some equipment has poor stability, which is very likely to cause safety accidents. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the existing technology, provide a tunnel construction platform vehicle and construction method, and thus realize the secondary reinforcement of the belt slag discharge tunnel after damage, achieve convenient construction while ensuring the continuous operation of the belt, and ultimately demonstrate the goal of fast, efficient and safe operation.

[0006] In order to solve the above technical problems, the present invention provides a tunnel construction platform vehicle, comprising: a vehicle chassis system, a vertical lifting system, a construction platform and a bearing mechanism;

[0007] The vertical lifting system and the bearing mechanism are respectively arranged on the vehicle chassis system, and the construction platform is respectively connected to the vertical lifting system and the bearing mechanism;

[0008] The vertical lifting system is used to control the adjustment of the working direction of the construction platform in the tunnel;

[0009] The carrying mechanism is used to extend and retract according to actual working conditions and carry the construction platform.

[0010] Furthermore, the vehicle chassis system includes: a vehicle chassis and legs;

[0011] A total of four legs are provided on both sides of the front and rear ends of the vehicle chassis;

[0012] The support legs are used to extend to the ground to support the vehicle chassis in a working state and to be retracted in a non-working state.

[0013] Furthermore, the vehicle chassis system further comprises: a tool box;

[0014] The tool box is arranged on the side of the vehicle chassis and is used for placing working tools.

[0015] Furthermore, the vehicle chassis system further includes: a storage tank;

[0016] The storage tank is arranged on the upper surface of the vehicle chassis and is used for placing tunnel reinforcement materials.

[0017] Furthermore, the vertical lifting system includes: a slewing system, a pitch lifting system and a mast-type lifting mechanism;

[0018] The slewing system includes a large slewing mechanism and a small slewing mechanism; the pitch lifting system includes a solid base, cylinder A, cylinder B and a pitch boom; the mast-type lifting mechanism includes mast a, mast b, mast c and mast d;

[0019] The lower end of the large rotary mechanism is fixedly connected to the front end of the upper surface of the vehicle chassis, and the upper end of the large rotary mechanism is arranged to rotate;

[0020] The masts a), b, c and d are vertically slidably connected in sequence;

[0021] The upper end of the large slewing mechanism is fixedly connected to the lower end of the solid base, the upper end of the large slewing mechanism is hinged to the lower end of the mast a, the lower end of the oil cylinder A is hinged to the upper end of the solid base, and the upper end of the oil cylinder A is hinged to the mast a;

[0022] The upper and lower ends of the oil cylinder B are hinged to the mast d and the luffing boom respectively;

[0023] The two ends of the small slewing mechanism are fixedly connected to the pitching boom and the construction platform respectively, and the end of the small slewing mechanism close to the construction platform is arranged to rotate.

[0024] Furthermore, the masts a, b, c and d are connected to each other through guide devices on the outer surface of the masts, and the chain transmission structure built into each mast is supplemented by a hydraulic device to achieve alternating lifting and lowering.

[0025] Furthermore, the construction platform includes: a support arm system and a load-bearing push-pull system;

[0026] The support arm system includes a Y-shaped bracket, a telescopic mechanism, a first load-bearing arm, a second load-bearing arm, a cylinder D, and a lap handle; the load-bearing push-pull system includes a load-bearing system and a push-pull system, wherein the load-bearing system includes a load-bearing plate and a hinge; the push-pull system includes a stop module, a propulsion module, and a cylinder C;

[0027] The two branch arms of the Y-shaped bracket are respectively provided with the telescopic mechanism, the telescopic end of the telescopic mechanism is connected to the first load-bearing arm, and the oil cylinder D is hinged to the first load-bearing arm and the second load-bearing arm respectively. By changing the stroke of the oil cylinder D itself, the folding or extension state between the first load-bearing arm and the second load-bearing arm is controlled;

[0028] The connecting handle is located at the end of the second load-bearing arm and is used to connect with the U-shaped hook fixed on the tunnel wall;

[0029] The load-bearing plate includes a plurality of steel plates, and the steel plates are connected to each other by hinges;

[0030] The stop module is fixed to the starting section of the first load-bearing arm, and the stop module is connected to the adjacent steel plate through a hinge;

[0031] The propulsion module is slidably connected to the upper surface of the first load-bearing arm or the second load-bearing arm, and the rear side of the propulsion module is connected to the adjacent steel plate via a hinge;

[0032] An oil cylinder C is fixed on each side of the first load-bearing arm, and the front end of the oil cylinder C is connected to the propulsion module.

[0033] Furthermore, the push-pull system further comprises a lateral slide, rollers, a directional shaft and a forward slide;

[0034] The propulsion module is designed to be embedded in the forward slide and the lateral slide, so as to achieve riding on the first load-bearing arm and the second load-bearing arm. The forward slide is arranged inside the arm body directly above the first load-bearing arm and the second load-bearing arm, and the lateral slide is arranged on both sides of the first load-bearing arm and the second load-bearing arm.

[0035] Rollers are installed at the bottom of each steel plate that makes up the load-bearing plate. When the load-bearing plate is spread out on the first load-bearing arm and the second load-bearing arm, the rollers are completely immersed in the positive slideway; the two ends of the directional axis of the rollers are respectively embedded in the linear slots on both sides of the positive slideway.

[0036] Furthermore, the bearing mechanism includes a base, a first telescopic arm, a second telescopic arm, a third telescopic arm, a T-shaped cross bracing structure, and a load-bearing groove;

[0037] Among them, the base is fixed to the middle position at the rear of the upper surface of the vehicle chassis. The first telescopic arm, the second telescopic arm, and the third telescopic arm are connected to the top of the base in sequence. The lower end of the T-shaped cross brace structure is connected to the upper end of the third telescopic arm. There is a load-bearing groove at each end of the T-shaped cross brace structure. The load-bearing groove is used to support the second load-bearing arm, so that the working plane can be carried when it is in a folded and retracted state or working along the axial direction of the tunnel.

[0038] A construction method for a tunnel construction platform vehicle is applied to the secondary reinforcement requirements of a belt-type slag-discharging tunnel, and is characterized by comprising:

[0039] Step 1: Stop the belt conveyor and hang safety warning signs at both ends of the construction area;

[0040] Step 2: Two teams of construction workers each hold a manual pneumatic drill and drill overlapping holes on the inner tunnel wall of the belt conveyor;

[0041] Step 3: After all the overlapping drillings are completed, two U-shaped hooks are manually inserted into the overlapping drillings on both sides of the tunnel wall;

[0042] Step 4: Adjust the working plane of the tunnel construction platform vehicle to a position that forms a 90° angle with the belt conveyor, and place the two overlapping handles into the deepest recesses of the two U-shaped hooks on the tunnel wall, forming an overall operation mode that spans the belt;

[0043] Step 5: The construction party arranges multiple people and multiple pneumatic drills to go to the working surface and gradually carry out secondary reinforcement work;

[0044] Step 6: After the construction workers complete the secondary reinforcement work within the applicable height range, they drill overlapping holes at an appropriate height on the working plane and install U-shaped hooks. Then all construction workers evacuate the working plane.

[0045] Step 7: Adjust the working plane of the tunnel construction platform vehicle to the position above the second installation of the U-shaped hook, and drop the two overlapping handles into the deepest part of the two U-shaped hooks on the tunnel wall. The overall working mode is still formed across the belt, and the construction personnel return to the working plane;

[0046] Step 8: After the tunnel wall reinforcement at the spandrel and waist near the inner side of the belt conveyor is completed, all construction personnel evacuate the work plane and rotate the work plane 180 degrees to the opposite side away from the belt conveyor. After the work plane is overlapped and fixed with the U-shaped hook on the opposite tunnel wall, the secondary reinforcement work of the tunnel wall at the opposite spandrel and waist is gradually carried out;

[0047] Step 9: After the tunnel wall reinforcement is completed at the spandrel and haunch opposite the belt conveyor, all construction personnel evacuate the work plane, adjust the work plane of the tunnel construction platform vehicle to a position near the tunnel vault, and start the secondary reinforcement work on the tunnel vault;

[0048] Step 10: After the secondary reinforcement work of the tunnel vault is completed, all construction workers will evacuate the work plane and remove the safety warning signs previously set up at the entrances and exits of the construction area.

[0049] Furthermore, the construction standards of the overlapping drill holes include: a. The position of the overlapping drill holes is not less than 30 cm higher than the upper edge of the belt conveyor; b. When the overlapping drill holes are drilled, a certain downward angle is required, and the downward angle is 45°~60°; c. The depth of the overlapping drill holes is 30 cm~50 cm; d. The number of overlapping drill holes is 2 on each side, and a total of 4 overlapping drill holes on both sides; e. The spacing between the two overlapping drill holes on a single side is based on the spacing between the two oblique legs of the U-shaped support hook, so that the U-shaped support hook can be inserted into the tunnel wall. The spacing between the groups of overlapping drill holes on both sides is based on the middle position of each group of overlapping drill holes as the reference point, and the spacing between the reference points on both sides is the actual width between the two overlapping handles on the working plane.

[0050] Furthermore, the design requirements of the U-shaped support hook include: the U-shaped support hook is made of high-strength round steel, the diameter of the round steel should be equal to the diameter of the drill rod commonly used in pneumatic drills, the two legs of the U-shaped support hook are equal in length and the length is 50cm~70cm, the angle between the two legs of the U-shaped support hook and the U-shaped part is 45°~60°, and the distance between the two legs is 20cm~25cm, and the vertical length of the U-shaped part of the U-shaped support hook is 15cm~25cm.

[0051] Furthermore, the step 4 includes:

[0052] Start the mast-type lifting mechanism and lift the folded and retracted working surface to a position that exceeds the load-bearing groove by more than 1m;

[0053] Operate the oil cylinder D to extend the second load-bearing arm until it is fully extended and fits tightly with the first load-bearing arm and is on the same horizontal plane;

[0054] Start the large rotary mechanism and rotate the extended working plane to the position where the angle between the belt conveyor and the working plane is 90°.

[0055] Continue to operate the mast-type lifting mechanism and lower the lap handle on the working surface directly above the belt conveyor to a position more than 50 cm from the inside of the U-shaped hook and the deepest part of the U-shaped hook;

[0056] Operate the telescopic mechanism to extend forward so that the arc-shaped slot of the overlap handle on the working plane is aligned with the most concave part of the U-shaped support hook;

[0057] Operate the mast-type lifting mechanism to lower it so that the arc-shaped slot of the overlap handle on the working surface fits into the deepest part of the U-shaped support hook;

[0058] Operate the oil cylinder C to spread the load-bearing plate along the first load-bearing arm and the second load-bearing arm, thereby forming a construction platform across the belt conveyor.

[0059] Furthermore, the step of adjusting the working plane of the tunnel construction platform vehicle to a position above the second installation of the U-shaped hook and placing the two overlapping handles into the most concave parts of the two U-shaped hooks on the tunnel wall respectively includes:

[0060] Operate the mast-type lifting mechanism to raise the column so that the arc-shaped slot of the lap handle is disengaged and extends at least 10 cm beyond the most concave part of the U-shaped hook;

[0061] Operate the telescopic mechanism to move backward so that the end of the overlap handle on the working plane is disengaged from the U-shaped hook at a horizontal distance of more than 50 cm;

[0062] Operate the mast-type lifting mechanism to raise the working surface to a position above the second installation of the U-shaped support hook. The vertical height should be at least 20 cm higher than the most concave part of the U-shaped support hook.

[0063] Operate the telescopic mechanism to extend forward so that the arc-shaped slot of the overlapping handle on the working plane is aligned with the deepest part of the U-shaped hook, and then operate the mast-type lifting mechanism to lower so that the arc-shaped slot of the overlapping handle is buckled into the deepest part of the U-shaped hook.

[0064] The beneficial effects achieved by the present invention are:

[0065] The tunnel construction platform vehicle and construction method proposed in this invention can realize the cross-belt secondary reinforcement operation of the belt slag discharge tunnel, satisfying the convenient construction requirements while ensuring the continuous operation of the belt. At the same time, it also has the construction capability for the tunnel vault part. The above advantages are lacking in other similar equipment. They greatly solve the safety hazards and efficiency problems existing in the original high-altitude tunnel operations, and ultimately achieve the goal of fast, efficient and safe operation. In addition to belt slag discharge tunnels, this patent can also be applied to general conventional tunnels or other cross-obstacle tunnel construction scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1This is a schematic diagram of the side structure of the tunnel construction platform vehicle in the folded state;

[0067] Figure 2 This is a schematic diagram of the side structure of the tunnel construction platform vehicle in the extended state;

[0068] Figure 3 It is a top view schematic diagram of the overall structure of the construction platform;

[0069] Figure 4 This is a simplified diagram of the push-pull load-bearing plate structure;

[0070] Figure 5 It is a schematic diagram of the load-bearing arm structure;

[0071] Figure 6 It is a schematic diagram of the load-bearing arm slide structure;

[0072] Figure 7 It is a schematic diagram of the bearing mechanism structure;

[0073] Figure 8 This is a schematic diagram of the tunnel construction platform vehicle operating across the belt.

[0074] 1-Vehicle chassis; 2-Toolbox; 3-Outriggers; 4-Storage tank; 5-Large slewing mechanism; 6-Solid base; 7-Cylinder A; 8-Mast lifting mechanism; 801-Mast a; 802-Mast b; 803-Mast c; 804-Mast d; 9-Cylinder B; 10-Long-lift arm; 11-Small slewing mechanism; 12-Y-bracket; 13-Telescopic mechanism; 14-Working plane; 1401-Stop module; 1402-Bearing plate; 1403-Propulsion module; 14031-Propulsion module longitudinal section; 1404-First bearing arm; 140 5-Second load-bearing arm; 1406-Cylinder C; 1407-Cylinder D; 1408-Lateral slide; 1409-Overlap handle; 1410-Hinge; 1411-Roller; 14111-Orienting axis; 1412-Forward slide; 14121-Longitudinal section of forward slide; 15-Carrying mechanism; 1501-Base; 1502-First telescopic arm; 1503-Second telescopic arm; 1504-Third telescopic arm; 1505-T-shaped cross bracing structure; 1506-Load-bearing groove; 16-U-shaped hook; 17-Belt conveyor; 18-Tunnel wall. DETAILED DESCRIPTION

[0075] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0076] The present invention proposes a tunnel construction platform vehicle, comprising a vehicle chassis system, a vertical lifting system, a construction platform, and a bearing mechanism. The accompanying construction method encompasses the entire construction process, with belt-discharging slag tunnels as a typical application scenario. By combining the equipment with auxiliary methods, construction applications in tunnels with special working conditions can be efficiently completed. The structural components of each component are detailed as follows:

[0077] (1) Structural composition:

[0078] 1) Vehicle chassis system:

[0079] like Figure 1 As shown, as an important component of the tunnel construction platform vehicle described in this patent, the vehicle chassis system mainly includes four components, namely the vehicle chassis (1), the tool box (2), the support legs (3), and the storage pool (4). Among them, the tool box (2) is an internal storage space provided in the vehicle chassis (1), which can be used to place work tools such as manual air drills, copper hammers, wrenches and U-shaped support hooks (16); and the storage pool (4) is a fence-type storage space provided on the upper surface of the vehicle chassis (1), which can be used to place bundles of anchor cables, steel mesh and I-beam support beams and other tunnel reinforcement materials. In addition, a total of four support legs (3) are provided on both sides of the vehicle chassis (1) at the front and rear ends. The support legs (3) can be extended or retracted according to whether the equipment is in working state. Its function is to stabilize the tunnel platform vehicle in the working state and prevent it from rolling over. The typical application scenarios of the support legs (3) are detailed in detail. Figure 8 .

[0080] 2) Vertical lifting system:

[0081] like Figure 1 、 Figure 2 As shown, the vertical lifting system of the tunnel construction platform vehicle described in this patent mainly includes three major components: a slewing system, a pitch lifting system, and a mast-type lifting mechanism (8). The specific secondary structure and functional positioning of each component are detailed as follows:

[0082] The slewing system includes a large slewing mechanism (5) and a small slewing mechanism (11), wherein the large slewing mechanism (5) is fixedly connected to the front end of the upper surface of the vehicle chassis (1), and the large slewing mechanism (5) can rotate 360 ​​degrees by itself, thereby realizing the driven rotation of the parts that are directly and indirectly fixedly connected to the upper surface of the large slewing mechanism (5), thereby completing the adjustment of the working direction of the equipment described in this patent in the tunnel. In addition, the two ends of the small slewing mechanism (11) are fixedly connected to the pitching arm (10) and the Y-shaped bracket (12) respectively. The function of the small slewing mechanism (11) is to fine-tune the working plane (14) through its own rotation, ensuring that the working plane (14) adapts to the inclined slope of the inclined shaft belt slag discharge tunnel at an appropriate angle, so that the working plane (14) is always parallel to the horizontal plane.

[0083] The pitching and lifting system includes a solid base (6), a cylinder A (7), a cylinder B (9) and a pitching boom (10), wherein the solid base (6) and the large rotary mechanism (5) are welded and fixed, and the main function of the solid base (6) is to fix the subsequent connecting mechanism as a whole. The lower end of the cylinder A (7) is hinged to the upper end of the solid base (6), and the upper end of the cylinder A (7) is also hinged to the mast a (801). The cylinder A (7) can realize the linkage pitching of the mast-type lifting mechanism (8) and other auxiliary connecting mechanisms by controlling its own telescopic stroke. The upper and lower ends of the cylinder B (9) are respectively hinged to the mast d (804) and the pitching boom (10). The cylinder B (9) can realize the lifting and lowering of the pitching boom (10), the small rotary mechanism (11) and the working plane (14) by controlling its own telescopic stroke.

[0084] The mast-type lifting mechanism (8) mainly includes mast a (801), mast b (802), mast c (803) and mast d (804), wherein the lower end of mast a (801) is hinged to the large rotary mechanism (5), and the mast-type lifting mechanism (8) can be controlled to pitch as the oil cylinder A (7) is extended and retracted. Figure 2 As shown, the mast-type lifting mechanism (8) can realize the alternating lifting and lowering of mast a (801), mast b (802), mast c (803) and mast d (804) in the vertical direction, thereby controlling the working plane (14) to complete the lifting operation in the vertical direction.

[0085] 3) Construction platform:

[0086] As shown in the figure: 1- Figure 6 As shown, the most critical component of the tunnel construction platform vehicle described in this patent is the construction platform, which mainly includes two parts: the support arm system and the load-bearing push-pull system. The specific secondary structure and functional positioning of each component are detailed as follows:

[0087] The support arm system mainly includes a Y-shaped bracket (12), a telescopic mechanism (13), a first load-bearing arm (1404), a second load-bearing arm (1405), a cylinder D (1407) and a lap handle (1409). The Y-shaped bracket (12) is the overall support structure of the entire working plane (14). The two branch arms of the Y-shaped bracket (12) are respectively provided with a telescopic mechanism (13). The function of the telescopic mechanism (13) is to control the first load-bearing arm (1404) and the second load-bearing arm (1405) to be retracted and extended through the change of its own stroke, and finally realize the lateral span adjustment of the working plane (14) in the tunnel, such as Figure 3 As shown. The oil cylinder D (1407) can realize the folding or stretching state between the first load-bearing arm (1404) and the second load-bearing arm (1405) by changing its own stroke, that is: when the tunnel construction platform vehicle is in a non-working state, the oil cylinder D (1407) can be operated by contraction to fold the first load-bearing arm (1404) and the second load-bearing arm (1405); when the tunnel construction platform vehicle is stopped and about to start working, the oil cylinder D (1407) can be operated by extension to unfold the first load-bearing arm (1404) and the second load-bearing arm (1405). Figure 8 As shown, the connecting handle (1409) is located at the end of the second load-bearing arm (1405), and its main purpose is to connect with the U-shaped support hook (16) fixed on the tunnel wall (18) to achieve support of the end of the working plane (14) near the tunnel wall (18), so that the working plane (14) will not overturn due to unilateral suspension, and can ensure that the working plane (14) can withstand the vibration impact during manual air drilling construction.

[0088] The load-bearing push-pull system is further divided into a load-bearing system and a push-pull system, wherein the load-bearing system mainly includes a load-bearing plate (1402) and a hinge (1410); the push-pull system mainly includes a stop module (1401), a propulsion module (1403), a longitudinal section of the propulsion module (14031), an oil cylinder C (1406), a lateral slide (1408), a roller (1411), a directional shaft (14111), a forward slide (1412), and a longitudinal section of the forward slide (14121).

[0089] The load-bearing plate (1402) of the load-bearing system is composed of multiple steel plates with a certain strength. The steel plates are connected to each other through hinges (1410), thereby ensuring that the load-bearing plate (1402) can be pushed and pulled to expand in the working state and folded and retracted in the non-working state.

[0090] The push-pull system, the stop module (1401) is located at the starting section of the first load-bearing arm (1404), and the two are fixedly connected. The stop module (1401) is connected to the adjacent load-bearing plate (1402) steel plate through a hinge (1410). The significance of the stop module (1401) is to keep the starting section in a fixed state during the process of the load-bearing plate (1402) being pushed, pulled or retracted. The details are as follows Figure 1-Figure 3 The overall appearance of the propulsion module (1403) is a step-shaped and slidable state. The rear side propulsion module longitudinal section (14031) of the propulsion module (1403) is as shown. Figure 5 As shown, the rear side of the propulsion module (1403) is connected to the steel plate of the adjacent load-bearing plate (1402) through a hinge (1410). The propulsion module (1403) can be ridden on the first load-bearing arm (1404) and the second load-bearing arm (1405) by being embedded in the forward slide (1412) and the lateral slide (1408). The forward slide (1412) is arranged inside the arm body directly above the first load-bearing arm (1404) and the second load-bearing arm (1405). The longitudinal section (14121) of the forward slide is as shown. Figure 6 As shown, the lateral slideway (1408) is provided on both sides of the first load-bearing arm (1404) and the second load-bearing arm (1405). An oil cylinder C (1406) is fixed on each side of the first load-bearing arm (1404), and the front end of the oil cylinder C (1406) is connected to the propulsion module (1403). In order to enable the load-bearing plate (1402) to slide on the first load-bearing arm (1404) and the second load-bearing arm (1405) along with the propulsion module (1403), rollers (1411) are installed at the bottom of each component steel plate of the load-bearing plate (1402). After the load-bearing plate (1402) is spread out on the first load-bearing arm (1404) and the second load-bearing arm (1405), the rollers (1411) can be completely immersed in the forward slideway (1412) without affecting the tight fit between the load-bearing plate (1402) and the first load-bearing arm (1404) and the second load-bearing arm (1405). The structural relationship between the rollers (1411), the forward slideway (1412) and the lateral slideway (1408) is as follows: Figure 6 As shown, the connection relationship between the orientation axis (14111) of the roller (1411) and the positive slideway (1412) is also as shown. Figure 6 As shown, the function of the directional shaft (14111) is to confine the roller (1411) within the forward slideway (1412) to prevent the load-bearing plate (1402) from jumping out of the slideway when folding and retracting.

[0091] 4) Carrying mechanism:

[0092] like Figure 2As shown, the bearing mechanism (15) of the tunnel construction platform vehicle described in this patent, the function of the bearing mechanism (15) is to be telescopic according to the actual working conditions and to carry the working plane (14), the bearing mechanism (15) mainly includes a base (1501), a first telescopic arm (1502), a second telescopic arm (1503), a third telescopic arm (1504), a T-shaped cross bracing structure (1505), and a load-bearing groove (1506). The base (1501) is fixed to the rear middle portion of the upper surface of the vehicle chassis (1), and the first telescopic arm (1502), the second telescopic arm (1503), and the third telescopic arm (1504) are sequentially connected to the upper surface of the base (1501). The lower end of the T-shaped cross bracing structure (1505) is connected to the upper end of the third telescopic arm (1504). Each end of the T-shaped cross bracing structure (1505) has a load-bearing groove (1506). The function of the load-bearing groove (1506) is to support the second load-bearing arm (1405), so that the working plane (14) can be carried when it is in a folded and stowed state or in a working state along the axial direction of the tunnel.

[0093] (2) Implementation method:

[0094] The present invention discloses a construction method of a tunnel construction platform vehicle:

[0095] This implementation plan proposes a specific construction method for the secondary reinforcement needs of belt-type slag-discharging tunnels. It also details the application of the tunnel construction platform vehicle in typical operating scenarios and how the various functions of the equipment are implemented, as follows:

[0096] Generally speaking, the entire circumferential section of a belt-type slag-discharging tunnel will require secondary reinforcement. The construction method proposed in this patent is implemented in the order of "arch spandrels and arch haunches" first, and then "arch crown", and is combined with the realization of the tunnel construction platform vehicle function, as detailed below:

[0097] A. Step 1: Notify the tunnel construction dispatching department to stop the belt conveyor (17) and hang safety warning signs at both ends of the construction area.

[0098] The step 1 includes placing the tunnel construction platform vehicle (such as Figure 1 Drive to the construction area and stop securely.

[0099] B. Step 2: Two groups of construction workers each hold a manual air drill and drill overlapping holes on the inner tunnel wall (18) of the belt conveyor (17). The overlapping holes are mainly used to insert the U-shaped hooks (16). The construction standards of the overlapping holes include: a. The overlapping hole position is not less than 30 cm above the upper edge of the belt conveyor; b. When drilling the overlapping holes, a certain downward angle is required, and the downward angle is preferably 45°~60°; c. The depth of the overlapping holes is preferably 30 cm~50 cm; d. The number of overlapping holes is There are 2 overlapping holes on each side, for a total of 4 overlapping holes on both sides, that is, two groups of construction workers construct 2 overlapping holes on each side; e. The spacing between the two overlapping holes on one side is based on the spacing between the two oblique legs of the U-shaped support hook (16), so that the U-shaped support hook (16) can be just inserted into the tunnel wall (18), and the spacing between the overlapping holes of each group on both sides (each group of overlapping holes is 2) is based on the middle position of each group of overlapping holes as the reference point, and the spacing between the reference points on both sides is the actual width between the two overlapping handles (1409) on the working plane (14).

[0100] The design requirements of the U-shaped support hook (16) include: the U-shaped support hook (16) is made of high-strength round steel, the diameter of the round steel should be equal to the diameter of the drill rod commonly used in the pneumatic drill, the two legs of the U-shaped support hook (16) are equal in length and the length is preferably 50cm~70cm, the angle between the two legs of the U-shaped support hook (16) and the U-shaped part is preferably 45°~60°, and the distance between the two legs is preferably 20cm~25cm, and the vertical length of the U-shaped part of the U-shaped support hook (16) is preferably 15cm~25cm.

[0101] C. Step 3. After all the overlapping drilling holes are completed, two U-shaped hooks (16) are manually inserted into the tunnel walls (18) on both sides. The installation standards of the U-shaped hooks (16) include that the two legs are not fully inserted into the overlapping drilling holes, and the length of the two legs exposed from the overlapping drilling holes should not be less than the distance from the arc-shaped slot on the overlapping handle (1409) to the overlapping handle (1409). The construction scheduling department is notified to resume the operation of the belt conveyor (17).

[0102] The step three includes, after the U-shaped hooks (16) on the tunnel walls (18) on both sides are inserted, fine-tuning the position of the tunnel construction platform vehicle in the construction area to ensure that the two overlapping handles (1409) of the working plane (14) can be exactly overlapped at the most concave part of the U-shaped hooks (16), and the distance between the tunnel construction platform vehicle and the belt conveyor (17) should be no less than 15 cm.

[0103] D. Step 4: Adjust the working plane (14) of the tunnel construction platform vehicle to a position with a 90° angle to the belt conveyor (17), and drop the two lap handles (1409) into the most concave part of the two U-shaped hooks (16) on the tunnel wall (18), so as to form an overall working mode across the belt, as shown in FIG. Figure 8 shown.

[0104] The fourth step includes starting the mast-type lifting mechanism (8) to lift the folded and retracted working plane (14) to a position more than 1m above the load-bearing groove (1506). Subsequently, the oil cylinder D (1407) is operated to extend until the second load-bearing arm (1405) is fully extended and tightly fits with the first load-bearing arm (1404) and is on the same horizontal plane. Next, the large rotary mechanism (5) is started to rotate the extended working plane (14) to a position directly above the belt conveyor (17) with an angle of 90° between the two. Then, the mast-type lifting mechanism (8) is continued to be operated to lower the connecting handle (1409) of the working plane (14) directly above the belt conveyor (17) to a position more than 50 cm away from the inside of the U-shaped support hook (16) and the most concave part of the U-shaped support hook (16). Next, the telescopic mechanism (13) is operated to extend forward so that the arc-shaped slot of the lap handle (1409) on the working plane (14) is aligned with the most concave part of the U-shaped support hook (16). Next, the mast-type lifting mechanism (8) is operated to descend so that the arc-shaped slot of the lap handle (1409) on the working plane (14) is buckled into the most concave part of the U-shaped support hook (16). Finally, the oil cylinder C (1406) is operated to spread the load-bearing plate (1402) along the first load-bearing arm (1404) and the second load-bearing arm (1405), thereby forming a construction platform across the belt conveyor (17), as shown in FIG. Figure 8 shown.

[0105] E. Step 5: Based on the actual situation on site, the construction party arranges multiple people and multiple pneumatic drills to climb onto the working plane (14) and gradually implement the secondary reinforcement work. It should be noted that all workers who climb up must wear safety belts, and the buckle end of the safety belt can be fixed to the old anchor rod on the tunnel wall (18).

[0106] F. Step 6: After the secondary reinforcement work within the height range is completed, the construction workers can drill overlapping holes at an appropriate height on the working plane (14) and install the U-shaped hooks (16) according to the construction standards of the overlapping holes in "Step 2" and the installation standards of the U-shaped hooks (16) in "Step 3". Then all construction workers can evacuate the working plane (14).

[0107] G. Step 7: Adjust the working plane (14) of the tunnel construction platform vehicle to a position slightly above the second installation of the U-shaped support hook (16), and drop the two overlapping handles (1409) into the deepest recesses of the two U-shaped support hooks (16) on the tunnel wall (18). The overall operation mode is still formed across the belt. The construction personnel return to the working plane (14), fasten their safety belts and continue to carry out the secondary reinforcement operation.

[0108] The seventh step comprises operating the mast-type lifting mechanism (8) to perform an ascending operation, so that the arc-shaped slot of the lap handle (1409) is disengaged and extends beyond the most concave part of the U-shaped support hook (16) by not less than 10 cm. Subsequently, the telescopic mechanism (13) is operated to perform a retreating operation, so that the end of the lap handle (1409) on the working plane (14) is disengaged from the U-shaped support hook (16) by a horizontal distance of more than 50 cm. Then, the mast-type lifting mechanism (8) is continued to operate to raise the working plane (14) to a position above the second installation of the U-shaped support hook (16), and the vertical height should extend beyond the most concave part of the U-shaped support hook (16) by not less than 20 cm. Finally, the telescopic mechanism (13) is operated to extend forward so that the arc-shaped slot of the lap handle (1409) on the working plane (14) is aligned with the most concave part of the U-shaped support hook (16), and then the mast-type lifting mechanism (8) is operated to descend so that the arc-shaped slot of the lap handle (1409) is buckled into the most concave part of the U-shaped support hook (16).

[0109] If the height of the working platform (14) still needs to be adjusted upwards, repeat "step six" and "step seven".

[0110] H. Step 8. After the spandrel and waist tunnel wall (18) near the inner side of the belt conveyor (17) are reinforced, all construction workers evacuate the working plane (14) and rotate the working plane (14) 180 degrees to the opposite side away from the belt conveyor (17). After the working plane (14) is overlapped and fixed with the U-shaped hook (16) on the opposite tunnel wall (18), the secondary reinforcement work of the spandrel and waist tunnel wall (18) is gradually carried out. The construction process, construction sequence and precautions involved in the process can be referred to "Steps 2 to 7".

[0111] The step eight involves the operation of the tunnel construction platform vehicle and the reinforcement of the inner side of the belt conveyor (17), which is a repeated operation. Except for operating the large rotary mechanism (5) to rotate the working plane (14) 180 degrees, the remaining operations can be implemented and adjusted accordingly according to "step seven".

[0112] I. Step 9: After the tunnel wall (18) at the spandrel and waist opposite to the belt conveyor (17) is reinforced, all construction workers evacuate the working plane (14) and adjust the working plane (14) to Figure 2The construction workers then boarded the work platform (14) and fastened their safety belts before starting the secondary reinforcement work on the tunnel vault.

[0113] The step nine comprises first operating the mast-type lifting mechanism (8) to raise the working plane (14) to a position above the last installed U-shaped hook (16), and then operating the telescopic mechanism (13) to perform a backward operation so that the lap handle (1409) is out of the U-shaped hook (16). Subsequently, the large rotary mechanism (5) is operated to rotate the extended working plane (14) 90 degrees clockwise so that the working plane (14) is parallel to the central axis of the tunnel. Next, the mast-type lifting mechanism (8) is operated to alternately raise mast a (801), mast b (802), mast c (803) and mast d (804) to an appropriate height (the working plane (14) is preferably 1.8m to 2m away from the tunnel vault). Finally, the carrying mechanism (15) is operated to lift the first telescopic arm (1502), the second telescopic arm (1503), and the third telescopic arm (1504) in sequence until the two bearing grooves (1506) of the T-shaped cross bracing structure (1505) and the second bearing arm (1405) are tightly supported, as shown in FIG. Figure 2 shown.

[0114] J. Step 10: After the secondary reinforcement work of the tunnel vault is completed, all construction workers will evacuate the work plane (14) and remove the safety warning signs previously set up at the entrance and exit of the construction area. If you need to rush to the next construction area, just drive the tunnel operation platform vehicle to the next area in the current state, and repeat the above steps for construction technology and process; if you do not need to continue construction, restore the tunnel operation platform vehicle to the Figure 1 The vehicle then drove away to a safe area and stopped.

[0115] The step ten is only described for the case where no further construction is required: first, the bearing mechanism (15) is operated to make the first telescopic arm (1502), the second telescopic arm (1503), and the third telescopic arm (1504) successively lower and retract to the initial state; then, the oil cylinder C (1406) is operated to perform a retraction operation so that the load-bearing plate (1402) is folded and retracted along the forward slide (1412) to within the range of the first load-bearing arm (1404); then, the oil cylinder D (1407) is operated to perform a retraction operation until the second load-bearing arm (1405) and the first load-bearing arm (1404) are completely folded, and the telescopic mechanism (13) is retracted back to the original state; then, the mast-type lifting mechanism (8) is operated to perform a lowering operation until the second load-bearing arm (1405) of the folded and retracted working plane (14) falls into the load-bearing groove (1506), as shown in FIG. Figure 1 shown.

[0116] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A tunnel construction platform vehicle, characterized in that: include: Vehicle chassis system, vertical lifting system, construction platform and carrying mechanism; The vertical lifting system and the bearing mechanism are respectively arranged on the vehicle chassis system, and the construction platform is respectively connected to the vertical lifting system and the bearing mechanism; The vertical lifting system is used to control the adjustment of the working direction of the construction platform in the tunnel; The carrying mechanism is used to extend and retract according to actual working conditions and carry the construction platform; The vertical lifting system includes: a rotation system, a pitch lifting system and a mast-type lifting mechanism (8); The slewing system includes a large slewing mechanism (5) and a small slewing mechanism (11); the pitching and lifting system includes a solid base (6), a cylinder A (7), a cylinder B (9), and a pitching arm (10); the mast-type lifting mechanism (8) includes a mast a (801), a mast b (802), a mast c (803), and a mast d (804); The lower end of the large rotary mechanism (5) is fixedly connected to the front end of the upper surface of the vehicle chassis (1), and the upper end of the large rotary mechanism (5) is arranged to rotate; The mast a (801), mast b (802), mast c (803) and mast d (804) are vertically slidably connected in sequence; The upper end of the large slewing mechanism (5) is fixedly connected to the lower end of the solid base (6), the upper end of the large slewing mechanism (5) is hinged to the lower end of the mast a (801), the lower end of the oil cylinder A (7) is hinged to the upper end of the solid base (6), and the upper end of the oil cylinder A (7) is hinged to the mast a (801); The upper and lower ends of the oil cylinder B (9) are respectively hinged to the mast d (804) and the luffing boom (10); The two ends of the small slewing mechanism (11) are fixedly connected to the pitching arm (10) and the construction platform respectively, and the small slewing mechanism (11) is arranged to rotate at one end close to the construction platform; The construction platform includes: a support arm system and a load-bearing push-pull system; The support arm system includes a Y-shaped bracket (12), a telescopic mechanism (13), a first load-bearing arm (1404), a second load-bearing arm (1405), an oil cylinder D (1407), and a lap handle (1409); the load-bearing push-pull system includes a load-bearing system and a push-pull system, wherein the load-bearing system includes a load-bearing plate (1402) and a hinge (1410); the push-pull system includes a stop module (1401), a propulsion module (1403), and an oil cylinder C (1406); The telescopic mechanism (13) is respectively provided in the two branch arms of the Y-shaped bracket (12); the telescopic end of the telescopic mechanism (13) is connected to the first load-bearing arm (1404); the oil cylinder D (1407) is hinged to the first load-bearing arm (1404) and the second load-bearing arm (1405), respectively; and the folding or extension state between the first load-bearing arm (1404) and the second load-bearing arm (1405) is controlled by changing the stroke of the oil cylinder D (1407); The connecting handle (1409) is located at the end of the second load-bearing arm (1405) and is used for connecting with the U-shaped hook (16) fixed on the tunnel wall (18); The load-bearing plate (1402) comprises a plurality of steel plates, and the steel plates are connected to each other via hinges (1410); The stop module (1401) is fixed to the starting section of the first load-bearing arm (1404), and the stop module (1401) is connected to the adjacent steel plate via a hinge (1410); The propulsion module (1403) is slidably connected to the upper surface of the first load-bearing arm (1404) or the second load-bearing arm (1405), and the rear side of the propulsion module (1403) is connected to the adjacent steel plate via a hinge (1410); An oil cylinder C (1406) is fixed to each side of the first load-bearing arm (1404), and the front end of the oil cylinder C (1406) is connected to the propulsion module (1403).

2. The tunnel construction platform vehicle according to claim 1, characterized in that: The vehicle chassis system comprises: a vehicle chassis (1) and supporting legs (3), A total of four supporting legs (3) are provided on both sides of the front and rear ends of the vehicle chassis (1); The support legs (3) are used to extend to the ground to support the vehicle chassis (1) in a working state, and to be retracted in a non-working state.

3. The tunnel construction platform vehicle according to claim 2, characterized in that: The vehicle chassis system further comprises: a tool box (2); The tool box (2) is arranged on the side of the vehicle chassis (1) and is used for placing working tools.

4. The tunnel construction platform vehicle according to claim 2, characterized in that: The vehicle chassis system further includes: a storage tank (4); The storage tank (4) is arranged on the upper surface of the vehicle chassis (1) and is used for placing tunnel reinforcement materials.

5. The tunnel construction platform vehicle according to claim 1, characterized in that: The masts a (801), b (802), c (803) and d (804) are connected to each other via guide devices on the outer surfaces of the masts, and are alternately lifted and lowered by a chain transmission structure built into each mast and assisted by a hydraulic device.

6. The tunnel construction platform vehicle according to claim 1, characterized in that: The push-pull system further includes a lateral slideway (1408), a roller (1411), a directional shaft (14111) and a forward slideway (1412); The propulsion module (1403) is designed to slide on the first load-bearing arm (1404) and the second load-bearing arm (1405) by being embedded in the forward slideway (1412) and the lateral slideway (1408). The forward slideway (1412) is arranged inside the arm body directly above the first load-bearing arm (1404) and the second load-bearing arm (1405), and the lateral slideway (1408) is arranged on both sides of the first load-bearing arm (1404) and the second load-bearing arm (1405). Rollers (1411) are installed at the bottom of each component steel plate of the load-bearing plate (1402). When the load-bearing plate (1402) is spread on the first load-bearing arm (1404) and the second load-bearing arm (1405), the rollers (1411) are completely immersed in the forward slideway (1412); the two ends of the directional axis (14111) of the roller (1411) are respectively embedded in the linear slots on both sides of the forward slideway (1412).

7. The tunnel construction platform vehicle according to claim 1, characterized in that: The bearing mechanism comprises a base (1501), a first telescopic arm (1502), a second telescopic arm (1503), a third telescopic arm (1504), a T-shaped cross bracing structure (1505), and a load-bearing groove (1506); The base (1501) is fixed to the rear middle portion of the upper surface of the vehicle chassis (1); the first telescopic arm (1502), the second telescopic arm (1503), and the third telescopic arm (1504) are sequentially connected to the upper surface of the base (1501); the lower end of the T-shaped cross bracing structure (1505) is connected to the upper end of the third telescopic arm (1504); and each end of the T-shaped cross bracing structure (1505) has a load-bearing groove (1506), which is used to support the second load-bearing arm (1405), so that the working plane (14) can be carried when it is in a folded and stowed state or in a working state along the axial direction of the tunnel.

8. A construction method based on the tunnel construction platform vehicle according to claim 1, applied to the secondary reinforcement requirements of belt slag discharge tunnels, characterized in that: include: Step 1: Stop the belt conveyor (17) and hang safety warning signs at both ends of the entrance and exit of the construction area; Step 2: Two groups of construction workers each hold a manual air drill and drill overlapping holes on the inner tunnel wall (18) of the belt conveyor (17); Step 3: After all the overlapping drillings are completed, two U-shaped hooks (16) are manually inserted into the overlapping drillings on both sides of the tunnel wall (18); Step 4: Adjust the working plane (14) of the tunnel construction platform vehicle to a position at a 90° angle to the belt conveyor (17), and drop the two overlapping handles (1409) into the most concave parts of the two U-shaped hooks (16) on the tunnel wall (18), so as to form an overall operation mode across the belt; Step 5: The construction party arranges multiple people and multiple pneumatic drills to go onto the working plane (14) and gradually implement the secondary reinforcement work; Step 6: After the construction workers have completed the secondary reinforcement work within the applicable height range, they drill overlapping holes at an appropriate height on the working plane (14) and install U-shaped support hooks (16), and then all the construction workers evacuate the working plane (14); Step 7: Adjust the working plane (14) of the tunnel construction platform vehicle to the position above the second installation of the U-shaped support hook (16), and drop the two overlapping handles (1409) into the most concave part of the two U-shaped support hooks (16) on the tunnel wall (18). The whole still forms an operating mode across the belt, and the construction personnel return to the working plane (14); Step eight, after the spandrel and waist tunnel wall (18) near the inner side of the belt conveyor (17) are reinforced, all construction workers evacuate the working plane (14), and rotate the working plane (14) 180 degrees to the opposite side away from the belt conveyor (17), and the working plane (14) is then connected and fixed with the U-shaped hook (16) on the opposite tunnel wall (18), and then the secondary reinforcement work of the opposite spandrel and waist tunnel wall (18) is gradually carried out; Step 9: After the tunnel wall (18) at the spandrel and waist opposite to the belt conveyor (17) is reinforced, all construction workers evacuate the working plane (14), adjust the working plane (14) of the tunnel construction platform vehicle to a position near the tunnel vault, and start the secondary reinforcement work on the tunnel vault; Step 10: After the secondary reinforcement work of the tunnel vault is completed, all construction workers evacuate the working plane (14) and remove the safety warning signs previously set up at the entrance and exit of the construction area.

9. The construction method according to claim 8, characterized in that: The construction standards of the overlapping drill holes include: a. The position of the overlapping drill holes is not less than 30 cm higher than the upper edge of the belt conveyor; b. When the overlapping drill holes are drilled, a certain downward angle is required, and the downward angle is 45°~60°; c. The depth of the overlapping drill holes is 30 cm~50 cm; d. The number of overlapping drill holes is 2 on each side, and a total of 4 overlapping drill holes on both sides; e. The spacing between the two overlapping drill holes on a single side is based on the spacing between the two oblique legs of the U-shaped support hook (16), so that the U-shaped support hook (16) can be just inserted into the tunnel wall (18), and the spacing between the overlapping drill holes on both sides is based on the middle position of each group of overlapping drill holes as the reference point, and the spacing between the reference points on both sides is the actual width between the two overlapping handles (1409) on the working plane (14).

10. The construction method according to claim 8, characterized in that: The design requirements of the U-shaped support hook (16) include: the U-shaped support hook (16) is made of high-strength round steel, the diameter of the round steel should be equal to the diameter of the drill rod commonly used in the pneumatic drill, the two legs of the U-shaped support hook (16) are equal in length and the length is 50cm~70cm, the angle between the two legs of the U-shaped support hook (16) and the U-shaped part is 45°~60°, and the distance between the two legs is 20cm~25cm, and the vertical length of the U-shaped part of the U-shaped support hook (16) is 15cm~25cm.

11. The construction method according to claim 8, characterized in that: The step 4 includes: Activate the mast-type lifting mechanism (8) to lift the folded and retracted working surface (14) to a position that is more than 1 meter above the load-bearing groove (1506); Operate the oil cylinder D (1407) to extend the second load-bearing arm (1405) until the second load-bearing arm (1405) is fully extended and fits tightly with the first load-bearing arm (1404) and is on the same horizontal plane; Start the large rotary mechanism (5) to rotate the extended working plane (14) to a position where the angle between the belt conveyor (17) and the belt conveyor (17) is 90 degrees; Continue to operate the mast-type lifting mechanism (8) and lower the connecting handle (1409) of the working plane (14) directly above the belt conveyor (17) to a position more than 50 cm from the inside of the U-shaped hook (16) and the most concave part of the U-shaped hook (16); The telescopic mechanism (13) is operated to extend forward so that the arc-shaped slot of the lap handle (1409) on the working plane (14) is aligned with the most concave part of the U-shaped support hook (16); The mast-type lifting mechanism (8) is operated to lower the mast-type lifting mechanism (8) so that the arc-shaped groove of the lap handle (1409) on the working plane (14) is buckled into the most concave part of the U-shaped support hook (16); The oil cylinder C (1406) is operated to spread the load-bearing plate (1402) along the first load-bearing arm (1404) and the second load-bearing arm (1405), thereby forming a construction platform across the belt conveyor (17).

12. The construction method according to claim 8, characterized in that: The step of adjusting the working plane (14) of the tunnel construction platform vehicle to a position above the second installation of the U-shaped support hook (16), and dropping the two overlapping handles (1409) into the most concave parts of the two U-shaped support hooks (16) on the tunnel wall (18) respectively, comprises: The mast-type lifting mechanism (8) is operated to perform an ascending operation, so that the arc-shaped slot of the lap handle (1409) is disengaged and extends beyond the most concave part of the U-shaped support hook (16) by not less than 10 cm; The telescopic mechanism (13) is operated to move backward so that the end of the lap handle (1409) on the working plane (14) is disengaged from the U-shaped hook (16) by a horizontal distance of more than 50 cm; Operate the mast-type lifting mechanism (8) to raise the working plane (14) to a position above the second installation of the U-shaped support hook (16), and the vertical height should exceed the most concave part of the U-shaped support hook (16) by not less than 20 cm; The telescopic mechanism (13) is operated to extend forward so that the arc-shaped slot of the lap handle (1409) on the working plane (14) is aligned with the most concave part of the U-shaped support hook (16), and then the mast-type lifting mechanism (8) is operated to descend so that the arc-shaped slot of the lap handle (1409) is buckled into the most concave part of the U-shaped support hook (16).

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