Construction device and construction method for tunnel auxiliary tunnel to enter main tunnel and roof brushing

Abstract

The invention relates to the technical field of main tunnel entering and top brushing construction, in particular to a main tunnel entering and top brushing construction device and method for an auxiliary tunnel, and the device comprises a hydraulic expansion unit, a core-pulling type drilling unit, a construction trolley, a top brushing adjusting arm movably connected with the construction trolley, and a material conveying unit arranged on one side of the construction trolley; through the cooperation of the top-picking mechanical arm and the core-pulling type drilling unit or the hydraulic expansion unit, core-pulling trepanning can be achieved, stone splashing is avoided, construction safety is guaranteed, reaming operation can be completed, generated stone is conveyed to the outside in time in cooperation with the material conveying unit, manual field operation is avoided, equipment entering is reduced, and the construction efficiency is improved. The working efficiency is improved while the cost is reduced; angle adjustment of the core-pulling type drilling unit and the hydraulic expansion unit can be achieved through the angle adjusting mechanism, the drilling requirements of different angles are met, it is guaranteed that chambering is safer, overexcavation and undercut are avoided, the stability and reliability of top-picking operation are improved, and the top-picking operation requirements are further met.

Description

Technical Field

[0001] The invention relates to the technical field of top-lift construction for entering a main tunnel, and in particular to a top-lift construction device and a construction method for entering a main tunnel of a tunnel auxiliary tunnel. Background Art

[0002] During the construction of extra-long tunnels, auxiliary tunnels are usually constructed on the side of the mountain to speed up the construction progress. When the auxiliary tunnel is constructed to the main tunnel position, it is necessary to carry out top construction to open up the main tunnel heading. Then the construction equipment enters the main tunnel for two-way excavation to improve construction efficiency.

[0003] Since the top-lifting operation is a key and difficult point in tunnel construction and a safety control point, it is necessary for construction personnel to cooperate with excavation equipment and small-scale drilling and blasting methods to dig holes. For example, the Chinese invention patent application with application number 202410859879.9 provides a tunnel exit horizontal guide cross-channel top and main tunnel double-side wall pilot pit construction method. It records that the C-section section of the main tunnel is constructed using a three-step + temporary invert arch method, and drilling and blasting are carried out by manual hand-held air-leg rock drills; the excavation of the double-side wall pilot pit section of the main tunnel is carried out by manual cooperation with excavators and pneumatic picks. There are mixed stone surrounding rocks in some areas, and a multi-functional work platform is used to manually hold a YT28 air-leg rock drill for blasting and excavation. And the Chinese invention patent application with application number 202110110079.3 provides a tunnel inclined shaft entering the main tunnel top construction method, which records that when excavating the upper half of the section, a simple drilling and blasting work platform is used for drilling and blasting, a CAT320 excavator is used to remove the ballast, an ITC312 excavator is used to load the ballast, and VOLVOA25 is used for transportation.

[0004] Therefore, the existing top-lift construction requires more manpower and equipment to complete tasks such as drilling, blasting, and stone cleaning, which increases the difficulty of construction, reduces construction efficiency, and prolongs the construction period; at the same time, although the existing top-lift construction is excavated by smooth blasting, which reduces the vibration caused by blasting and improves the safety of excavation; but smooth blasting requires precise control of the amount of explosives, which can easily cause over-excavation and under-excavation, which not only increases the subsequent workload, but also reduces the construction quality, increases the difficulty of protecting the main tunnel arch, further increases the construction difficulty and construction cost, reduces the construction efficiency, and cannot meet the actual construction needs. Summary of the invention

[0005] The purpose of the present invention is to provide a tunnel auxiliary tunnel top-lifting construction device and construction method for the main tunnel, so as to solve the technical problem of low efficiency of the current main tunnel top-lifting construction.

[0006] The present invention solves the above-mentioned technical problems by:

[0007] A tunnel auxiliary tunnel main tunnel top-lift construction equipment comprises a hydraulic expansion unit, a core-pulling drilling unit, a construction trolley, a top-lift adjustment arm movably connected to the construction trolley and a material feeding unit arranged on one side of the construction trolley, wherein the top-lift adjustment arm is provided with an angle adjustment mechanism, and the top-lift adjustment arm is movably connected to the core-pulling drilling unit or the hydraulic expansion unit through the angle adjustment mechanism, and the material feeding unit extends from the bottom of the core-pulling drilling unit or the hydraulic expansion unit to the outside of the construction trolley.

[0008] It is further defined that the construction trolley is provided with a folding arm adjustment unit, and the folding arm adjustment unit includes a folding arm rotation drive and a rotation drive rod;

[0009] The rotary drive rod is arranged along the construction depth direction, and the folding arm rotary drive is connected with the top adjusting arm through the rotary drive rod, driving the top adjusting arm to rotate around the axis of the rotary drive rod, and the folding arm rotary drive is connected with the construction trolley.

[0010] It is further defined that the folding arm adjustment unit also includes a lifting drive and a lifting slider. A lifting slide is opened on the construction trolley. The fixed end of the lifting drive is connected to the construction trolley, and the output end of the lifting drive is connected to the lifting slider. One end of the lifting slider cooperates with the lifting slide, and the other end of the lifting slider is connected to the folding arm rotation drive through a connecting vertical plate. The rotation drive rod is located on one side of the folding arm rotation drive, and the rotation drive rod is rotatably connected to the connecting vertical plate. The connecting vertical plate is located on the outside of the lifting slide, and the folding arm adjustment unit is located above the feeding unit.

[0011] It is further defined that the angle adjustment mechanism includes an adapter arm, a drill angle drive and an L-turn arm;

[0012] The adapter arm is provided with an angle drive clamping hole and a rotating hole arranged in the same direction as the angle drive clamping hole, the fixed end of the drill angle drive is connected to the adapter arm through the angle drive clamping hole, the output end of the drill angle drive extends to the outside of the adapter arm, the long arm of the L-turn arm is rotatably connected to the adapter arm through the rotating hole, the short arm of the L-turn arm extends to the outside of the adapter arm and is connected to the core-pulling drilling unit or the hydraulic expansion unit, the output end of the drill angle drive is transmission-connected to the long arm of the L-turn arm, driving the core-pulling drilling unit or the hydraulic expansion unit to rotate around the long arm of the L-turn arm, and the top adjustment arm is connected to one side of the adapter arm.

[0013] It is further defined that the top-lifting adjustment arm includes an upper folding arm, a lower folding arm, an upper folding telescopic drive and a lower folding telescopic drive;

[0014] The top end of the upper folding arm is connected to the drilling angle adjustment mechanism, the bottom end of the upper folding arm is hinged to the top end of the lower folding arm through a first limiting bolt, the upper folding telescopic drive is located on the outside of the first limiting bolt, one end of the upper folding telescopic drive is connected to the upper folding arm, and the other end of the upper folding telescopic drive is connected to the lower folding arm; the bottom end of the lower folding arm is hinged to the end of the rotation drive rod through a second limiting bolt, the lower folding telescopic drive is located on the outside of the second limiting bolt, one end of the lower folding telescopic drive is connected to the lower folding arm, and the other end of the lower folding telescopic drive is connected to the rotation drive rod.

[0015] It is further defined that the upper folding arm includes a first folding arm, a hydraulic drive, a pneumatic pump and a second folding arm connected in sequence, the top end of the lower folding arm is hinged to the bottom end of the first folding arm through a first limiting bolt, and the second folding arm is detachably connected to the transfer arm.

[0016] It is further defined that the hydraulic expansion unit includes an expansion drive, an expansion shell, and an adjustment arm expansion joint;

[0017] The expansion drive is detachably connected to the short arm of the L-arm through the expansion joint of the adjustment arm. The expansion drive is arranged on the inner side of the expansion shell to drive the expansion shell to expand or recover. The expansion shell is sleeved on the outer side of the expansion joint of the adjustment arm.

[0018] The core-pulling drilling unit comprises a hollow drill bit and a drilling rig, and the hollow drill bit is detachably connected to the short arm of the L-shaped arm through the drilling rig.

[0019] It is further defined that the feed unit includes a feed chute, a feed drive, a feed traction rod, a feed hopper and two of the hopper moving wheel groups; the feed chute is connected to the construction trolley, the material receiving end of the feed chute is located below the core-pulling drilling unit or the hydraulic expansion unit, the material dropping end of the feed chute passes through the bottom of the folding arm adjustment unit and extends to the rear of the construction trolley, and the material dropping end of the feed chute is higher than the material receiving end of the feed chute;

[0020] The two hopper moving wheel groups are arranged on opposite sides of the feed hopper along the length direction of the feed chute, one of the hopper moving wheel groups is located in the feed chute and slidingly cooperates with the feed chute, and is arranged close to the drop end of the feed chute; the other hopper moving wheel group is located above the feed chute; the feed traction rod is arranged on the feed chute along the width direction of the feed chute, the feed traction rod is connected to the feed hopper through a traction rope, the fixed end of the feed drive is connected to the construction trolley, and the output end of the feed drive is transmission-connected to the feed traction rod.

[0021] It is further defined that a running unit is provided at the bottom of the construction trolley, and the running unit includes a steering mechanism and a driving mechanism, the steering mechanism and the driving mechanism are located on opposite sides of the construction trolley, and the folding arm adjustment unit is close to the steering mechanism or the driving mechanism.

[0022] A method for top-lifting construction of a tunnel auxiliary tunnel entering a main tunnel, based on the above-mentioned top-lifting construction equipment for the tunnel auxiliary tunnel entering a main tunnel, comprises the following steps:

[0023] S1, the construction trolley moves from the auxiliary tunnel to the working surface at the junction of the main tunnel and the auxiliary tunnel;

[0024] S2, the feeding hopper slides to the receiving end of the feeding chute under the action of the feeding drive;

[0025] S3, connecting the core-pulling drilling unit to the angle adjustment mechanism;

[0026] S4, the top adjustment arm cooperates with the folding arm adjustment unit and the angle adjustment mechanism to drive the core-pulling drilling unit to perform core-pulling drilling on the working surface, remove the core stone to obtain the working hole, and repeat the drilling operation of the working hole until the drilling demand of the current working surface is met;

[0027] S5, disassembling the core-pulling drilling unit and connecting the hydraulic expansion unit to the angle adjustment mechanism;

[0028] S6, the top adjustment arm cooperates with the folding arm adjustment unit and the angle adjustment mechanism to drive the hydraulic expansion unit to move to the set working hole position. The hydraulic expansion unit performs adjustable static extrusion expansion on the working hole on the working surface according to the set extrusion expansion force, and repeats the extrusion expansion operation until the working surface expansion requirement is completed;

[0029] S7, the conveying hopper collects the scattered stones during the drilling and reaming operations. After the conveying hopper is full, the conveying drive is started to drive the conveying hopper to move to the drop end of the conveying chute until the conveying hopper turns around the hopper moving wheel group near the drop end of the conveying chute to complete the unloading;

[0030] S8, the construction trolley moves forward to the next operation surface, and then executes step S2 until the main tunnel top selection operation task is completed.

[0031] The beneficial effects of the present invention are:

[0032] 1. The present invention can realize drilling operations at different heights and expand holes at different positions to different degrees by cooperating with the top-picking mechanical arm and the core-pulling drilling unit or the hydraulic expansion unit, thereby improving the controllability of the top-picking operation and avoiding over-excavation and under-excavation; making the scattered stones more concentrated, and cooperating with the feeding unit, the generated stones can be transported to the outside in time, thereby avoiding manual on-site operations, reducing the equipment entry, reducing costs and improving work efficiency; and the angle adjustment mechanism can be used to adjust the operating angles of the core-pulling drilling unit and the hydraulic expansion unit to meet the drilling requirements at different angles, and can also ensure that the expansion is safer, improve the stability and reliability of the top-picking operation, and further meet the top-picking operation requirements; using the core-pulling drilling unit to open holes, stone splashing is avoided, construction safety is ensured, and after the hole is opened, the hole flushing operation is reduced, the operation difficulty is reduced, the work efficiency is further improved, and the actual construction requirements of the top-picking of the main hole are met.

[0033] 2. The present invention utilizes a folding arm adjustment mechanism to adjust the angle of the top-lifting adjustment arm, thereby being able to perform operations at different angles in a limited construction space, thereby increasing the operating range, reducing the time for adjusting the position of the construction trolley, and improving work efficiency; at the same time, in conjunction with the angle adjustment mechanism, the top-lifting adjustment arm can also avoid affecting the protective support on the surrounding sides during operation, thereby adapting to the needs of top-lifting operations and ensuring the safety of top-lifting operations.

[0034] 3. The feed hopper of the present invention is provided with two hopper moving wheel groups, one of which slides by engaging with the feed chute, so that the hopper moving wheel group can not only transport stones along the feed chute, but also flip over to unload after the feed hopper moves to the drop end of the feed chute. The operation is simple, manual loading and unloading is avoided, the operation difficulty and operation cost are reduced, and the operation efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the construction of the tunnel top drilling equipment of the present invention;

[0036] Figure 2 This is a three-dimensional structural diagram of the hollow drill bit of the present invention;

[0037] Figure 3 This is a three-dimensional structural diagram of the hydraulic expansion unit of the present invention;

[0038] Figure 4 It is a side view of the hydraulic expansion unit of the present invention;

[0039] Figure 5 This is a diagram showing the connection state between the angle adjustment mechanism of the present invention and the drilling rig;

[0040] Figure 6 This is a three-dimensional structural diagram of the top adjustment arm of the present invention;

[0041] Figure 7 It is a three-dimensional structural diagram of the steering mechanism of the present invention;

[0042] Figure 8 A top view of the steering mechanism of the present invention;

[0043] Fig. 9 It is a three-dimensional structural diagram of the driving mechanism of the present invention;

[0044] Fig.10 This is a diagram showing the connection state of the lifting chute and the folding arm adjustment unit of the present invention;

[0045] Fig.11 This is a three-dimensional structural diagram of the feeding unit of the present invention;

[0046] In the figure, 100-construction trolley; 110-lifting slide; 120-lifting drive base; 200-top adjustment arm; 210-upper folding arm; 211-first folding arm; 211a-upper folding clamp; 211b-upper folding oblique support seat; 212-hydraulic drive; 213-air pressure pump; 214-second folding arm; 220-lower folding arm; 220a-lower folding slot; 220b-lower folding oblique support seat; 220c-lower folding clamp; 221-upper folding drive base; 230-upper folding telescopic drive; 231-first limit bolt; 232-upper folding drive connecting seat; 240-lower folding telescopic drive; 240a-lower folding drive 240b-downward folding drive chuck; 241-second limiting bolt; 250-folding arm connector; 300-core-pulling drilling unit; 310-hollow drill bit; 311-drill bit wall; 312-drill teeth; 313-drill bit connector; 320-drilling machine; 400-folding arm adjustment unit; 410-lifting drive; 411-lifting drive connector; 420-lifting slider; 421-lifting drive sleeve; 430-folding arm rotation drive; 431-second driving gear; 432-limiting plate; 440-rotation drive rod; 440a-drive rod slot; 440b-drive rod diagonal support seat; 441- The second driven gear; 450-connecting vertical plate; 451-driving rod sleeve; 500-hydraulic expansion unit; 510-expansion drive; 511-fixed base; 520-expansion shell; 521-expansion slot; 530-adjusting arm expansion joint; 600-angle adjustment mechanism; 610-adapting arm; 611-angle drive clamping hole; 612-rotating hole; 620-drill bit angle drive; 621-first driving gear; 630-L turning arm; 631-first driven gear; 640-folding arm connecting slot; 700-feeding unit; 710-feeding chute; 720-feeding drive; 721-driving fixed Plate; 730-feeding traction rod; 731-traction rope; 740-feeding hopper; 750-hopper moving wheel group; 760-chute baffle; 761-hopper card interface; 800-traveling unit; 810-steering mechanism; 811-turning handle; 812-turning rod; 812a-driving sprocket; 813-driven rod; 813a-driven sprocket; 813b-limiting protrusion; 814-transmission chain; 815-steering wheel; 820-driving mechanism; 821-drive connecting plate; 822-traveling drive; 823-drive horizontal axis; 824-driving wheel; A-main hole; B-stone; C-auxiliary tunnel. DETAILED DESCRIPTION

[0047] like Figure 1As shown, after excavating along the longitudinal direction of the auxiliary tunnel C to the intersection with the main tunnel A, it is necessary to carry out top construction according to the arch structure of the main tunnel. At this time, it is necessary to excavate on the corresponding working surface of the main tunnel to facilitate the subsequent construction equipment to carry out excavation of the main tunnel along the top construction face. The scattered stones B will be cleaned and transported by loading equipment later.

[0048] During the top-lifting operation, it is necessary to drill a hole and then expand the hole on the working surface opposite to the auxiliary tunnel C to achieve excavation. The drilling operation at a high position is carried out by manually building a scaffold on site. The operation has high risks and low efficiency. If multiple people are involved in the operation, the operation cost will be increased.

[0049] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] Example 1

[0051] refer to Figure 1 The present embodiment provides a tunnel auxiliary tunnel main tunnel top-lifting construction equipment, including a hydraulic expansion unit 500, a core-pulling drilling unit 300, a construction trolley 100, a top-lifting adjustment arm 200 movably connected to the construction trolley 100, and a feeding unit 700 arranged on one side of the construction trolley 100, the top-lifting adjustment arm 200 is provided with an angle adjustment mechanism 600, the top-lifting adjustment arm 200 is movably connected to the core-pulling drilling unit 300 or the hydraulic expansion unit 500 through the angle adjustment mechanism 600, and the feeding unit 700 extends from the bottom of the core-pulling drilling unit 300 or the hydraulic expansion unit 500 to the outside of the construction trolley 100.

[0052] During the roofing operation, the construction trolley 100 moves to the work surface, and the roofing adjustment arm 200 drives the core-pulling drilling unit 300 to open the work hole according to the demand with the assistance of the angle adjustment mechanism 600. It can not only meet the needs of opening work holes at different angles, but also avoid internal supports to open holes, thereby ensuring the reliable implementation of the roofing operation and meeting the needs of the roofing operation.

[0053] At the same time, using the core-pulling drilling unit 300 for drilling can reduce the vibration generated by drilling through the crushing equipment, avoid the splashing of stones during the crushing process, and ensure the safety of the operation; at the same time, the core-pulling drilling unit 300 can be used to achieve drilling and coring, avoid excessive debris remaining in the borehole, and also avoid blowing and cleaning the borehole, thereby reducing the difficulty of drilling and improving the overall efficiency of the top-picking operation.

[0054] After the opening of the working hole is completed, the hydraulic expansion unit 500 can be replaced to perform static hole expansion on the working hole to avoid vibration caused by gunpowder explosion, and at the same time avoid over-excavation and under-excavation, so as to ensure stable and reliable construction.

[0055] At the same time, in conjunction with the material feeding unit 700, the stones generated during the drilling and expansion process are collected and transported to the rear of the construction trolley 100, and are directly transported by the loading vehicle, thereby reducing the use of cleaning equipment, reducing costs and improving efficiency.

[0056] The core-pulling drilling unit 300 includes a hollow drill bit 310 and a drilling rig 320 , and the hollow drill bit 310 is movably connected to the angle adjustment mechanism 600 through the drilling rig 320 .

[0057] refer to Figure 2 The hollow drill bit 310 includes a drill bit wall 311, drill teeth 312 and a drill bit connector 313. The drill teeth 312 are arranged in an array around the axis of the drill bit wall 311 at one end of the drill bit wall 311, and the drill bit connector 313 is arranged at the other end of the drill bit wall 311. The drill bit connector 313 is detachably connected to the output end of the drilling rig 320, and the connection method can be selected from threaded connection or clamping, etc.

[0058] The hollow drill bit 310 is driven to rotate by the drilling rig 320, and the hollow drill bit 310 drills and coring at the corresponding position of the working surface as required, thereby reducing the splash of gravel during the drilling operation, reducing the vibration of the working surface, improving the drilling efficiency and ensuring the safety and reliability of the top-picking operation; and after drilling with the hollow drill bit 310, the stone core rods after drilling can be concentrated in the feeding unit 700 for collection, which is convenient for feeding, reduces the later site cleaning time, and improves the working efficiency.

[0059] Compared with gunpowder blasting, the hydraulic expansion unit 500 is more stable and reliable, has high safety, low cost and high efficiency; compared with chemical blasting or pneumatic structure blasting, it has higher hole expansion capacity and higher efficiency than gunpowder blasting and chemical blasting. The expansion force can be precisely controlled, and different expansion forces can be applied according to the position of the working hole to squeeze and expand the working hole to avoid over-excavation and under-excavation, and also to avoid stone splashing. It is easy to collect and has higher safety, which further meets the needs of actual top-picking operations.

[0060] Specifically, the hydraulic expansion unit 500 includes an expansion drive 510, an expansion shell 520 and an adjusting arm expansion joint 530; one end of the adjusting arm expansion joint 530 is detachably connected to the drilling angle adjustment mechanism 600, and the disassembly method can be selected from threaded connection, bolt connection, or clamping connection, and the other end of the adjusting arm expansion joint 530 is connected to the expansion drive 510, and the expansion drive 510 is preferably hydraulically driven; the shape of the expansion shell 520 matches the opened working hole, and the cylindrical shape is used as an example for explanation. The number of expansion shells 520 is at least two, and when the number of expansion shells 520 is multiple, three or four can be selected; all expansion shells 520 are installed on the outside of the expansion drive 510 around the axis of the adjusting arm expansion joint 530.

[0061] The expansion drive 510 can be optionally a hydraulic pump station, which can not only meet the demand for expansion force required for different working hole expansion, but also can accurately control the expansion force, so as to facilitate the adjustment of the expansion force according to the position of the working hole and the properties of the stone around the working hole, thereby improving the applicability of the hole expansion operation.

[0062] When the number of expansion shells 520 is three or four, the number of expansion drives 510 is the same as the number of expansion shells 520, the fixed ends of the corresponding number of expansion drives 510 are spliced ​​in sequence, and the output ends of the expansion drives 510 are connected to the corresponding expansion shells 520; when in use, the expansion drives 510 are synchronously extended through the corresponding expansion shells 520 to squeeze the working hole to complete the hole expansion operation; after the hole expansion is completed, the expansion drive 510 can be retracted.

[0063] When the number of expansion shells 520 is two, the number of expansion drives 510 is one or two; when the number of expansion drives 510 is one, the expansion shell 520 is a semicircular structure, and the fixed end and the output end of the expansion drive 510 are both connected to the corresponding expansion shell 520. When working, the expansion drive 510 uses two expansion shells 520 to squeeze the working hole.

[0064] refer to Figure 3 When the number of expansion drives 510 is two, the fixed ends of the two expansion drives 510 are both provided with a fixed base 511 to increase the extrusion stroke and the degree of hole expansion; the two expansion drives 510 are connected through the fixed base 511, the output end of the expansion drive 510 is connected to the corresponding expansion shell 520, and the adjustment arm expansion joint 530 is connected to the outside of the two fixed bases 511.

[0065] The expansion drive 510 is utilized to drive the expansion shell 520 to squeeze and expand the working hole, thereby causing the stones on the side of the working hole to break and fall off. When in use, the position of the working hole on the working surface can be determined. For example, the degree of hole expansion and the degree of falling off on the working surface can be increased for the working hole in the middle, while for the working hole on the side of the working surface, it is sufficient to ensure that the stones on the side of the working surface fall off to avoid over-excavation, thereby ensuring that the top-lifting operation is safe and reliable and meets the operation requirements. In addition, during the hole expansion operation, the hydraulic expansion unit 500 can be extended into the working hole to avoid under-excavation due to gunpowder blasting or agent blasting due to filler reasons, thereby improving the reliability of the top-lifting operation and also improving work efficiency.

[0066] refer to Figure 4 In order to ensure the safety and reliability of hole expansion and facilitate disassembly and maintenance, it is preferred to set an expansion slot 521 on the inner wall of the expansion shell 520, and the expansion slot 521 is detachably connected to the output end of the corresponding expansion drive 510.

[0067] Further explanation: due to the uneven end faces of the working surface, working holes need to be opened at different positions and angles. At the same time, due to the need for support maintenance during the top lifting operation, when the working hole is close to the protective support, in order to avoid the collision between the top lifting adjustment arm 200 and the protective support, the angle adjustment mechanism 600 is used to realize the different opening requirements of the working holes in the top lifting operation.

[0068] refer to Figure 5 The drilling angle adjustment mechanism 600 includes a transfer arm 610, a drill angle drive 620 and an L-turn arm 630. The transfer arm 610 is provided with an angle drive clamping hole 611 and a rotation hole 612. The angle drive clamping hole 611 and the rotation hole 612 are provided in the same direction.

[0069] Among them, a folding arm connecting groove 640 is provided at one end of the transfer arm 610, and the transfer arm 610 is detachably connected to the top adjustment arm 200 through the folding arm connecting groove 640.

[0070] The drill angle drive 620 cooperates with the angle drive clamping hole 611, and the angle drive clamping hole 611 matches the shape of the fixed end of the drill angle drive 620. For example, the cross-section of the angle drive clamping hole 611 can be selected to be rectangular or polygonal to prevent the drill angle drive 620 itself from rotating in the angle drive clamping hole 611.

[0071] At the same time, a first limiting hole is opened on the adapter arm 610, and the first limiting hole is connected to the angle drive clamping hole 611. A second limiting hole is opened at the fixed end of the drill angle driver 620, so that after the drill angle driver 620 is installed in the angle drive clamping hole 611, a third limiting bolt is used to pass through the first limiting hole and connect with the second limiting hole to ensure a stable connection between the drill angle driver 620 and the adapter arm 610; the output end of the drill angle driver 620 extends to the outside of the adapter arm 610.

[0072] The L-shaped arm 630 is an L-shaped structure. The long arm of the L-shaped arm 630 is rotatably connected to the transfer arm 610 through the rotating hole 612. The short arm of the L-shaped arm 630 is located on the outside of the transfer arm 610. The end of the short arm of the L-shaped arm 630 is connected to the drilling rig 320 or the adjusting arm expansion joint 530, so that the core-pulling drilling unit 300 or the hydraulic expansion unit 500 can rotate around the axis of the rotating hole 612 to adjust the pitch angle during operation to meet the requirements of opening the working hole. At the same time, the hydraulic expansion unit 500 can also be extended to different working holes for hole expansion. For ease of use, the adjustable arm expansion joint 530 can be selected to be detachably connected to the drilling rig 320. The drilling rig 320 is stopped during hole expansion, thereby avoiding disassembly of the drilling rig 320 when opening and expanding the hole, thereby further improving the operation efficiency.

[0073] At this time, a first driving gear 621 is set on the output end of the drill angle drive 620, and a first driven gear 631 is set at the end of the long side of the L-shaped arm 630. The first driving gear 621 is meshed with the first driven gear 631, so that the rotation of the output end of the drill angle drive 620 is controlled, and the operation is simple.

[0074] refer to Figure 6 The top-lifting adjustment arm 200 includes an upper folding arm 210, a lower folding arm 220, an upper folding telescopic drive 230 and a lower folding telescopic drive 240. A folding arm connecting head 250 is arranged at the top of the upper folding arm 210. The folding arm connecting head 250 is clamped with the folding arm connecting groove 640 by the fourth limiting bolt. The bottom end of the upper folding arm 210 is rotatably connected with the top end of the lower folding arm 220 by the first limiting bolt 231. At this time, an upper folding clamp 211a is arranged at the bottom end of the upper folding arm 210, and a lower folding groove 220a cooperating with the upper folding clamp 211a is arranged at the top of the lower folding arm 220. The upper folding clamp 211a is rotatably connected with the lower folding groove 220a by the first limiting bolt 231.

[0075] The upper folding telescopic drive 230 is located on the outside of the first limiting bolt 231, and the upper folding telescopic drive 230 is connected between the upper folding arm 210 and the lower folding arm 220; an upper folding drive base 221 is provided on the lower folding arm 220, and the upper folding drive base 221 is close to the lower folding card slot 220a, and an upper folding oblique support seat 211b is provided on the upper folding arm 210, and the upper folding oblique support seat 211b is close to the upper folding card head 211a. At this time, an upper folding drive connecting seat 232 is provided at the bottom of the upper folding telescopic drive 230, and the upper folding drive connecting seat 232 is connected to the upper folding drive base 221, and the top of the upper folding telescopic drive 230 is hinged to the upper folding oblique support seat 211b.

[0076] At the same time, a lower folding clamp 220c is arranged at the bottom end of the lower folding arm 220, and the lower folding clamp 220c is rotatably connected to the construction trolley 100 through the second limiting bolt 241; a lower folding oblique support seat 220b is arranged on the lower folding arm 220, and the lower folding telescopic drive 240 is located on the outside of the second limiting bolt 241, and a lower folding drive slot 240a is arranged on the top of the lower folding telescopic drive 240, and the lower folding drive slot 240a is hinged to the lower folding oblique support seat 220b, and a lower folding drive clamp 240b is arranged at the bottom of the lower folding telescopic drive 240, and the lower folding drive clamp 240b is rotatably connected to the construction trolley 100.

[0077] By extending and retracting the upper folding telescopic drive 230 and the lower folding telescopic drive 240, the angle between the upper folding arm 210 and the lower folding arm 220 and the angle between the lower folding arm 220 and the horizontal direction are controlled, and the height of the core-pulling drilling unit 300 or the hydraulic expansion unit 500 on the top of the lower folding arm 220 and the distance from the working surface are adjusted to meet the working requirements at different heights and angles on the working surface.

[0078] Further explanation, in order to ensure the hole-drilling efficiency of the hollow drill bit 310, the upper folding arm 210 includes a first folding arm 211, a hydraulic drive 212, a pneumatic pump 213 and a second folding arm 214 connected in sequence, wherein the upper folding clamp 211a is located at the bottom end of the first folding arm 211, the upper folding oblique support 211b is located at the bottom of the first folding arm 211, and the folding arm connecting head 250 is located at the top of the second folding arm 214; when drilling, the hydraulic drive 212 and the pneumatic pump 213 are used to provide reliable support force to the hollow drill bit 310.

[0079] The construction trolley 100 is preferably movable. For example, a traveling unit 800 is provided at the bottom of the construction trolley 100 to facilitate forward and backward movement and left and right movement.

[0080] The traveling unit 800 includes a steering mechanism 810 and a driving mechanism 820 , and the steering mechanism 810 and the driving mechanism 820 are located at the front and rear sides of the bottom of the construction trolley 100 . Preferably, the steering mechanism 810 is close to the top adjustment arm 200 .

[0081] The steering mechanism 810 can utilize a rotating handle to drive a wheel to rotate in a certain direction, thereby controlling the travel direction of the construction trolley 100 and making it easier to adjust the position.

[0082] refer to Figure 7 In one embodiment, the steering mechanism 810 includes a rotating handle 811, a rotating rod 812, a driving sprocket 812a, a driven rod 813, a driven sprocket 813a, a transmission chain 814 and a steering wheel 815; wherein the number of the steering wheels 815, the number of the driven rods 813 and the number of the driven sprockets 813a are all two.

[0083] refer to Figure 8 The rotating rod 812 and the two driven rods 813 are all vertically arranged and rotatably connected to the construction trolley 100. The rotating rod 812 and the two driven rods 813 form an isosceles triangle structure, preferably an equilateral triangle structure; the top of the rotating rod 812 extends to the top of the construction trolley 100, and the movable handle 811 is connected to the top of the rotating rod 812 for easy operation; the bottom of the driven rod 813 passes through the construction trolley 100 and extends to the bottom of the construction trolley 100, the steering wheel 815 is rotatably connected to the corresponding driven rod 813, and a limiting protrusion 813b is provided on the driven rod 813 to limit the driven rod 813.

[0084] The driven sprocket 813a is connected to the driven rod 813, the driving sprocket 812a is connected to the rotating rod 812, and the transmission chain 814 is sleeved on the outside of the driving sprocket 812a and the two driven sprockets 813a, so that when the driving sprocket 812a rotates, the two driving sprockets 812a are driven to rotate synchronously through the transmission chain 814, thereby realizing the steering of the construction trolley 100 when it moves.

[0085] refer to Fig. 9 The driving mechanism 820 includes a driving connecting plate 821, a traveling drive 822, a driving transverse shaft 823 and a driving wheel 824, wherein the number of the driving wheels 824 is an even number, the traveling drive 822 is connected to the construction trolley 100 through the driving connecting plate 821, the driving wheels 824 are installed at both ends of the driving transverse shaft 823, the driving transverse shaft 823 is rotationally connected to the construction trolley 100, and the traveling drive 822 drives the corresponding driving transverse shaft 823 to rotate; the traveling drive 822 can be selected to be driven by a motor or an engine, and the traveling drive 822 can be selected to be one, used to drive all the driving transverse shafts 823 to rotate; the number of the traveling drives 822 can be selected to be the same as the number of the driving transverse shafts 823, so that each traveling drive 822 drives the corresponding driving transverse shaft 823 to rotate.

[0086] Further explanation, by arranging the folding arm adjustment unit 400 on the construction trolley 100, the purpose is to reduce the frequent left and right adjustments of the position of the construction trolley 100 during the top-lifting operation of the main tunnel, so that the top-lifting adjustment arm 200 drives the core-pulling drilling unit 300 to open holes at the left and right positions of the working surface and drives the hydraulic expansion unit 500 to expand the working holes at different positions, thereby increasing the opening range of the core-pulling drilling unit 300.

[0087] refer to Fig.10 Specifically, the folding arm adjustment unit 400 includes a folding arm rotation drive 430 and a rotation drive rod 440. The rotation drive rod 440 is perpendicular to the working surface. A connecting vertical plate 450 is provided at the fixed end of the folding arm rotation drive 430. The folding arm rotation drive 430 is connected to the construction trolley 100 through the connecting vertical plate 450. A driving rod sleeve 451 is provided on the connecting vertical plate 450. The driving rod sleeve 451 is located on one side of the folding arm rotation drive 430. One end of the rotation drive rod 440 is rotatably connected to the connecting vertical plate 450 through the driving rod sleeve 451. The other end of the driving rod 440 is provided with a driving rod slot 440a, which is hinged to the lower folding clamp 220c. A driving rod diagonal support seat 440b is provided on the rotating driving rod 440, and the driving rod diagonal support seat 440b is close to the driving rod slot 440a. The driving rod diagonal support seat 440b is hinged to the lower folding driving clamp 240b. The rotating driving rod 440 is transmission-connected with the folding arm rotating drive 430, and is used for driving the top lifting adjustment arm 200 to rotate around the axis of the rotating driving rod 440, thereby increasing the top lifting operation range and further improving work efficiency.

[0088] At this time, a second driving gear 431 can be optionally set at the output end of the folding arm rotation drive 430, and a second driven gear 441 meshing with the second driving gear 431 can be set on the rotation drive rod 440. In order to ensure stable and reliable transmission, a limit plate 432 is selected to be set on the outer end face of the second driving gear 431. The limit plate 432 is coaxially arranged with the second driving gear 431. The diameter of the limit plate 432 is larger than the diameter of the second driving gear 431, so that the limit plate 432 covers the side end of the second driven gear 441, which is used to limit the movement of the second driven gear 441 along its axial direction.

[0089] Further explanation, in order to further improve the operating range of the top-lifting adjustment arm 200, the folding arm adjustment unit 400 also includes a lifting drive 410 and a lifting slider 420, and the lifting slider 420 is connected to the connecting vertical plate 450; at this time, a lifting drive connecting seat 411 is arranged at the bottom of the lifting drive 410, and a lifting drive sleeve 421 is arranged at the bottom of the lifting slider 420, and the top of the lifting drive 410 is clamped with the lifting drive sleeve 421, and the lifting slider 420 is simultaneously connected to the construction trolley 100 in a vertical direction for sliding connection, and at the same time, a lifting drive base 120 is arranged on the construction trolley 100, and the lifting drive 410 is detachably connected to the lifting drive base 120 through the lifting drive connecting seat 411, thereby further improving the operating range of the top-lifting adjustment arm 200 in the vertical direction.

[0090] A lifting slot 110 is correspondingly provided on the construction trolley 100. Preferably, one end of the lifting slider 420 cooperates with the lifting slot 110, so that the lifting slider 420 can slide up and down along the lifting slot 110 and be restricted in the lifting slot 110. The lifting drive base 120 is located on the outside of the lifting slot 110, and the lifting drive sleeve 421 is located on the other end of the lifting slider 420, that is, the lifting drive sleeve 421 is located on the outside of the lifting slot 110.

[0091] To further illustrate, the number of the top-lifting adjustment arms 200 can be selected as one. In order to improve the efficiency of the top-lifting construction, it can also be selected as two or more. When the number of the top-lifting adjustment arms 200 is two or more, all the top-lifting adjustment arms 200 are arranged on the construction trolley 100 at intervals in the horizontal direction; two top-lifting adjustment arms 200 are taken as an example for explanation.

[0092] Correspondingly, the number of lifting chutes 110, the number of core-pulling drilling units 300, the number of hydraulic expansion units 500 and the number of folding arm adjustment units 400 are all the same as the number of top-lifting adjustment arms 200, so that multiple core-pulling drilling units 300 or multiple hydraulic expansion units 500 are connected to the corresponding top-lifting adjustment arms 200 through the angle adjustment mechanism 600, and the top-lifting adjustment arms 200 are connected to the corresponding lifting chutes 110 through the folding arm adjustment units 400, thereby realizing the synchronous drilling operation of multiple core-pulling drilling units 300 or the synchronous expansion operation of multiple hydraulic expansion units 500, further improving the efficiency of the top-lifting operation of the main hole.

[0093] To further explain, the stone produced after the hole expansion is completed is aggregated and transported through the feeding unit 700.

[0094] refer to Fig.11 The material conveying unit 700 includes a material conveying chute 710, a material conveying drive 720, a material conveying traction rod 730, a material conveying hopper 740 and two hopper moving wheel groups 750.

[0095] The material conveying chute 710 is connected to the construction trolley 100. The material receiving end of the material conveying chute 710 is located below the core-pulling drilling unit 300 or the hydraulic expansion unit 500. The material dropping end of the material conveying chute 710 passes through the bottom of the folding arm adjustment unit 400 and extends to the rear of the construction trolley 100. The material dropping end of the material conveying chute 710 is higher than the material receiving end of the material conveying chute 710, which facilitates the material hopper 740 to slide from the material dropping end to the material receiving end after unloading.

[0096] Two hopper moving wheel groups 750 are arranged on the front and rear sides of the feed hopper 740 along the length direction of the feed chute 710. The hopper moving wheel group 750 located on the front side of the feed hopper 740 is clamped on the inner side of the feed chute 710 and slides with the feed chute 710. The hopper moving wheel group 750 located on the rear side of the feed hopper 740 is placed on the upper end surface of the feed chute 710; the feed traction rod 730 is arranged on the feed chute 710 along the width direction of the feed chute 710. The feed traction rod 730 can be optionally arranged at the bottom or below the feed chute 710, and preferably the feed traction rod 730 is located at the dropping end of the feed chute 710.

[0097] The fixed end of the material conveying drive 720 is connected to the construction trolley 100 via a driving fixed plate 721 , and the output end of the material conveying drive 720 is transmission-connected to the material conveying traction rod 730 .

[0098] The feeding traction rod 730 is connected to the feeding hopper 740 by a traction rope 731, and the hopper moving wheel group 750 cooperating with the feeding chute 710 is close to the dropping end of the feeding chute 710, so that after the feeding hopper 740 slides to the dropping end of the feeding chute 710, the feeding traction rod 730 continues to rotate, and the feeding hopper 740 is pulled by the traction rope 731, and the front side hopper moving wheel group 750 contacts the dropping end of the feeding chute 710, and the feeding hopper 740 flips upward around its front side hopper moving wheel group 750, thereby completing the unloading.

[0099] After unloading is completed, the feed drive 720 rotates in the opposite direction, and the feed hopper 740, under the traction of the traction rope 731, relies on its own gravity to flip to the rear side of the hopper moving wheel group 750 to contact the upper end surface of the feed chute 710, and then the feed hopper 740 slides to the receiving end of the feed chute 710 to prepare for the next feed.

[0100] Among them, a hopper card interface 761 is opened at the material receiving end of the feed chute 710. After the hopper moving wheel group 750 on the front side of the feed hopper 740 passes through the hopper card interface 761 and cooperates with the feed chute 710, a chute baffle 760 is set on the hopper card interface 761 to ensure that the operation of the feed hopper 740 is stable and reliable.

[0101] Example 2

[0102] Based on the tunnel auxiliary tunnel entering the main tunnel top-lifting construction equipment provided in Example 1, this embodiment provides a tunnel auxiliary tunnel entering the main tunnel top-lifting construction method, including the following steps:

[0103] S1, the construction trolley 100 moves from the auxiliary tunnel C to the working surface at the junction of the main tunnel A and the auxiliary tunnel C;

[0104] Specifically, the construction trolley 100 moves under the action of the driving mechanism 820, and the steering mechanism 810 is used to adjust the travel direction of the construction trolley 100, so that the construction trolley 100 moves in front of the working surface, and at the same time, the dropping end of the material feeding chute 710 is adjusted toward the auxiliary tunnel, so as to facilitate the stone loading vehicle to receive and transport the materials.

[0105] S2, the feeding hopper 740 slides to the material receiving end of the feeding chute 710 under the action of the feeding drive 720;

[0106] Specifically, after the construction trolley 100 approaches the working surface, the feed drive 720 rotates in the opposite direction, loosens the traction rope 731, and allows the feed hopper 740 to slide stably to the material receiving end of the feed chute 710 by its own weight, and the feed hopper 740 approaches the working surface to avoid material leakage; then the feed drive 720 stops rotating.

[0107] S3, connecting the core-pulling drilling unit 300 to the angle adjustment mechanism 600;

[0108] Specifically, according to the diameter of the working hole and the required depth of the working hole, a hollow drill bit 310 of corresponding specifications is selected; then the hollow drill bit 310 is connected to the drilling rig 320, and then the drilling rig 320 is connected to the L-arm 630 to prepare for the drilling operation.

[0109] S4, the top adjustment arm 200 cooperates with the folding arm adjustment unit 400 and the angle adjustment mechanism 600 to drive the core-pulling drilling unit 300 to perform core-pulling drilling on the working surface, remove the core stone to obtain the working hole, and repeat the drilling operation of the working hole until the drilling demand of the current working surface is met;

[0110] Specifically, the position of the working hole is set according to the working surface. First, the angle between the upper folding arm 210 and the lower folding arm 220 is adjusted by the upper folding telescopic drive 230 to adjust the height of the hollow drill bit 310. If the height is not met, the lower telescopic drive 240 is used to adjust the angle between the lower folding arm 220 and the rotating drive rod 440, thereby ensuring the drilling requirements of the hollow drill bit 310 at different heights on the working surface; if the working hole is located on either side of the folding arm rotating drive 430, the folding arm rotating drive 430 is used to drive the top adjusting arm 200 to rotate around the axis of the rotating drive rod 440, so that the hollow drill bit 310 can cover the drilling requirements at different positions of the working surface.

[0111] Since the angle between the axis of the working hole and the working surface is not fixed according to needs, when there is an angle between the upper folding arm 210 and the working surface, the drill angle drive 620 can be used to drive the hollow drill bit 310 to drill vertically on the working surface, or drive the hollow drill bit 310 to drill on the working surface parallel to the upper folding arm 210. The angle between the hollow drill bit 310 and the upper folding arm 210 can also be adjusted to realize the opening of working holes at different angles on the working surface to meet different drilling needs.

[0112] During the drilling process, the drill rig 320 drives the hollow drill bit 310 to rotate and perform core drilling to complete the opening of a single working hole; the opening operation of the working holes is circulated in this way until the opening requirements of all working holes are completed.

[0113] S5, disassembling the core-pulling drilling unit 300 and connecting the hydraulic expansion unit 500 to the angle adjustment mechanism 600;

[0114] Specifically, after the opening of the working hole is completed, the drilling rig 320 or the idle drill bit 310 is dismantled, and the dismantling of the hollow drill bit 310 is taken as an example for explanation, and then the adjusting arm expansion joint 530 is connected to the output end of the drilling rig 320.

[0115] S6, the top adjustment arm 200 cooperates with the folding arm adjustment unit 400 and the angle adjustment mechanism 600 to drive the hydraulic expansion unit 500 to move to the set working hole position, and the hydraulic expansion unit 500 performs adjustable static extrusion expansion on the working hole on the working surface according to the extrusion expansion force of the set size, and repeats the extrusion expansion operation until the working surface expansion requirement is completed;

[0116] Similarly, in order to allow the expansion drive 510 and the expansion shell 520 to extend into the working hole for hole expansion, it is necessary to adjust the position of the hydraulic expansion unit 500 and the angle with the working surface, and try to set the expansion shell 520 coaxially with the working hole to ensure safe and controllable hole expansion.

[0117] During the hole expansion process, the expansion force can be adjusted by the expansion drive 510 according to the position of the working hole, and the expansion shell 520 can be used to squeeze and destroy the stones around the working hole from the inside out; for example, a working hole located in the middle of the working surface can use a larger expansion force, the purpose of which is to increase the degree of peeling of the stones in the middle of the working surface and facilitate the peeling of the stones around the outer working holes; for the working holes around the working surface, in order to avoid over-excavation, the expansion force is reduced to reduce the squeezing of the stones outside the working surface; at the same time, due to the peeling of the stones in the middle of the working surface, a smaller expansion force is applied to the working holes around the working surface to destroy the peeling of the stones near the middle of the working surface; this process is repeated to complete the hole expansion of all working holes, thereby improving the hole expansion quality and efficiency.

[0118] Furthermore, hole expansion in this manner is more stable, stone splashing is avoided, and the stripped stone is scattered more concentratedly, making it easier for the feeding unit 700 to receive and feed the material later.

[0119] S7, the feed hopper 740 collects the scattered stones during the drilling and reaming operations. After the feed hopper 740 is full, the feed drive 720 is started to drive the feed hopper 740 to move to the discharge end of the feed chute 710 until the feed hopper 740 turns around the hopper moving wheel group 750 near the discharge end of the feed chute 710 to complete the unloading;

[0120] Specifically, when drilling and coring, the hopper 740 can collect the stone core rods dropped by the hollow drill bit 310 to avoid the scattering of stones, which increases the difficulty and time cost of later cleaning. At the same time, it is convenient for material collection and increases the conveying quality and efficiency of stones.

[0121] During the hole expansion operation, the stripped stones are also scattered more concentratedly, and the stripped stones are collected by the feeding hopper 740, which also ensures the feeding efficiency and avoids affecting the movement of the loading vehicle and the construction trolley 100.

[0122] After the feed hopper 740 is full, the feed drive 720 rotates forward, and the traction rope 731 is used to drive the feed hopper 740 to move toward the drop end of the feed chute 710, until the feed hopper 740 is flipped under the limit of the front hopper moving wheel group 750, and the rear hopper moving wheel group 750 is away from the feed chute 710, so that the collected stones are unloaded onto the loading vehicle at the corresponding position, completing the unloading.

[0123] Then execute step S2, so that the feed hopper 740 slides to the receiving end of the feed chute 710 to continue collecting materials; wherein, when the feed hopper 740 is unloading, the drilling operation and the reaming operation are stopped; at the same time, multiple unloading operations can be carried out during the drilling operation and the reaming operation, and the drilling operation or the reaming operation is continued after the unloading is completed until the top picking operation of the current working surface is completed.

[0124] S8. The construction trolley 100 moves forward to the next operation surface, and then executes step S2 until the main tunnel top selection operation task is completed.

[0125] After completing the top-lifting operation of the previous working surface, the construction trolley 100 moves to the next working surface again to prepare for the top-lifting operation of the next working surface.

[0126] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the present invention.

Claims

1. A tunnel auxiliary tunnel entry main tunnel top pick construction equipment, characterized in that: The invention comprises a hydraulic expansion unit (500), a core-pulling drilling unit (300), a construction trolley (100), a top adjustment arm (200) movably connected to the construction trolley (100), and a material feeding unit (700) arranged on one side of the construction trolley (100), wherein the top adjustment arm (200) is provided with an angle adjustment mechanism (600), the top adjustment arm (200) is movably connected to the core-pulling drilling unit (300) or the hydraulic expansion unit (500) via the angle adjustment mechanism (600), and the material feeding unit (700) extends from below the core-pulling drilling unit (300) or the hydraulic expansion unit (500) to the outside of the construction trolley (100).

2. The tunnel auxiliary tunnel main tunnel top-lifting construction equipment according to claim 1 is characterized in that: The construction trolley (100) is provided with a folding arm adjustment unit (400), and the folding arm adjustment unit (400) comprises a folding arm rotation drive (430) and a rotation drive rod (440); The rotary drive rod (440) is arranged along the construction depth direction, and the folding arm rotary drive (430) is connected to the top adjustment arm (200) through the rotary drive rod (440), driving the top adjustment arm (200) to rotate around the axis of the rotary drive rod (440), and the folding arm rotary drive (430) is connected to the construction trolley (100).

3. The tunnel auxiliary tunnel entry main tunnel top lifting construction equipment according to claim 2 is characterized in that: The folding arm adjustment unit (400) further comprises a lifting drive (410) and a lifting slider (420). A lifting slide groove (110) is provided on the construction trolley (100). The fixed end of the lifting drive (410) is connected to the construction trolley (100). The output end of the lifting drive (410) is connected to the lifting slider (420). One end of the lifting slider (420) cooperates with the lifting slide groove (110). The other end of the lifting slider (420) is connected to the folding arm rotation drive (430) through a connecting vertical plate (450). The rotation drive rod (440) is located on one side of the folding arm rotation drive (430). The rotation drive rod (440) is rotatably connected to the connecting vertical plate (450). The connecting vertical plate (450) is located on the outside of the lifting slide groove (110). The folding arm adjustment unit (400) is located above the feeding unit (700).

4. The tunnel auxiliary tunnel main tunnel top-lifting construction equipment according to claim 2 is characterized in that: The angle adjustment mechanism (600) comprises a transfer arm (610), a drill angle drive (620) and an L-shaped arm (630); The transfer arm (610) is provided with an angle drive clamping hole (611) and a rotation hole (612) arranged in the same direction as the angle drive clamping hole (611); the fixed end of the drill angle drive (620) is connected to the transfer arm (610) through the angle drive clamping hole (611); the output end of the drill angle drive (620) extends to the outside of the transfer arm (610); the long arm of the L-shaped arm (630) is rotatably connected to the transfer arm (610) through the rotation hole (612). The short arm of the L-shaped arm (630) extends to the outside of the transfer arm (610) and is connected to the core-pulling drilling unit (300) or the hydraulic expansion unit (500); the output end of the drill angle drive (620) is transmission-connected to the long arm of the L-shaped arm (630), driving the core-pulling drilling unit (300) or the hydraulic expansion unit (500) to rotate around the long arm of the L-shaped arm (630); and the top adjustment arm (200) is connected to one side of the transfer arm (610).

5. The tunnel auxiliary tunnel main tunnel top-lifting construction equipment according to claim 4 is characterized in that: The lifting and adjusting arm (200) comprises an upper folding arm (210), a lower folding arm (220), an upper folding telescopic drive (230) and a lower folding telescopic drive (240); The top end of the upper folding arm (210) is connected to the drilling angle adjustment mechanism (600), the bottom end of the upper folding arm (210) is hinged to the top end of the lower folding arm (220) through a first limiting bolt (231), the upper folding telescopic drive (230) is located on the outside of the first limiting bolt (231), one end of the upper folding telescopic drive (230) is connected to the upper folding arm (210), and the other end of the upper folding telescopic drive (230) is connected to the lower folding arm (220); the bottom end of the lower folding arm (220) is hinged to the end of the rotating drive rod (440) through a second limiting bolt (241), the lower folding telescopic drive (240) is located on the outside of the second limiting bolt (241), one end of the lower folding telescopic drive (240) is connected to the lower folding arm (220), and the other end of the lower folding telescopic drive (240) is connected to the rotating drive rod (440).

6. The tunnel auxiliary tunnel entry main tunnel top lifting construction equipment according to claim 5 is characterized in that: The upper folding arm (210) comprises a first folding arm (211), a hydraulic drive (212), a pneumatic pump (213) and a second folding arm (214) which are connected in sequence; the top end of the lower folding arm (220) is hinged to the bottom end of the first folding arm (211) via a first limiting bolt (231); and the second folding arm (214) is detachably connected to the transfer arm (610).

7. The tunnel auxiliary tunnel entry main tunnel top lifting construction equipment according to claim 4 is characterized in that: The hydraulic expansion unit (500) comprises an expansion drive (510), an expansion shell (520) and an adjustment arm expansion joint (530); The expansion drive (510) is detachably connected to the short arm of the L-shaped arm (630) through the adjustment arm expansion joint (530); the expansion drive (510) is arranged on the inner side of the expansion shell (520) to drive the expansion shell (520) to expand or recover; the expansion shell (520) is sleeved on the outer side of the adjustment arm expansion joint (530); The core-pulling drilling unit (300) comprises a hollow drill bit (310) and a drilling machine (320), and the hollow drill bit (310) is detachably connected to the short arm of the L-shaped arm (630) via the drilling machine (320).

8. The tunnel auxiliary tunnel entry main tunnel top-lifting construction equipment according to any one of claims 2 to 7, characterized in that: The feeding unit (700) comprises a feeding chute (710), a feeding drive (720), a feeding traction rod (730), a feeding hopper (740) and two hopper moving wheel groups (750); the feeding chute (710) is connected to the construction trolley (100), the material receiving end of the feeding chute (710) is located below the core-pulling drilling unit (300) or the hydraulic expansion unit (500), the material dropping end of the feeding chute (710) passes through the bottom of the folding arm adjustment unit (400) and extends to the rear of the construction trolley (100), and the material dropping end of the feeding chute (710) is higher than the material receiving end of the feeding chute (710); The two hopper moving wheel groups (750) are arranged on opposite sides of the feed hopper (740) along the length direction of the feed chute (710); one of the hopper moving wheel groups (750) is located in the feed chute (710) and slides with the feed chute (710), and is arranged close to the drop end of the feed chute (710); the other hopper moving wheel group (750) is located above the feed chute (710); the feed traction rod (730) is arranged on the feed chute (710) along the width direction of the feed chute (710), the feed traction rod (730) is connected to the feed hopper (740) through a traction rope (731), the fixed end of the feed drive (720) is connected to the construction trolley (100), and the output end of the feed drive (720) is transmission-connected to the feed traction rod (730).

9. The tunnel auxiliary tunnel entry main tunnel top lifting construction equipment according to claim 8, characterized in that: A running unit (800) is arranged at the bottom of the construction trolley (100), and the running unit (800) includes a steering mechanism (810) and a driving mechanism (820). The steering mechanism (810) and the driving mechanism (820) are located on opposite sides of the construction trolley (100), and the folding arm adjustment unit (400) is close to the steering mechanism (810) or the driving mechanism (820).

10. A method for top-lifting construction of a tunnel auxiliary tunnel into a main tunnel, characterized in that: The tunnel auxiliary tunnel entry main tunnel top-lifting construction equipment according to claim 8 comprises the following steps: S1, the construction trolley (100) moves from the auxiliary tunnel (C) to the working surface at the junction of the main tunnel (A) and the auxiliary tunnel (C); S2, the feeding hopper (740) slides to the material receiving end of the feeding chute (710) under the action of the feeding drive (720); S3, connecting the core-pulling drilling unit (300) to the angle adjustment mechanism (600); S4, the top adjustment arm (200) cooperates with the folding arm adjustment unit (400) and the angle adjustment mechanism (600) to drive the core-pulling drilling unit (300) to perform core-pulling drilling on the working surface, remove the core stone to obtain the working hole, and repeat the drilling operation of the working hole until the drilling demand of the current working surface is met; S5, disassembling the core-pulling drilling unit (300) and connecting the hydraulic expansion unit (500) to the angle adjustment mechanism (600); S6, the top adjustment arm (200) cooperates with the folding arm adjustment unit (400) and the angle adjustment mechanism (600) to drive the hydraulic expansion unit (500) to move to the set working hole position, and the hydraulic expansion unit (500) performs adjustable static extrusion expansion on the working hole on the working surface according to the extrusion expansion force of the set size, and repeats the extrusion expansion operation until the working surface expansion requirement is met; S7, the feed hopper (740) collects the scattered stones during the drilling and reaming operations. After the feed hopper (740) is full, the feed drive (720) is started to drive the feed hopper (740) to move to the discharge end of the feed chute (710), until the feed hopper (740) turns around the hopper moving wheel group (750) near the discharge end of the feed chute (710) to complete the unloading; S8, the construction trolley (100) moves forward to the next operation surface, and then executes step S2 until the main tunnel top selection operation task is completed.

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