Tunnel digging and changing multi-head water drill and splitting rod loading and unloading device and construction method thereof

Abstract

The invention discloses a tunnel digging and changing multi-head water drill and splitting rod loading and unloading device and a construction method thereof.The device comprises a splitting rod loading and unloading device body, and the splitting rod loading and unloading device body comprises a mounting frame, a splitting rod loading and unloading actuator, a splitting rod loading and unloading actuator movement driving device and a multifunctional groove; the cleavage rod loading and unloading actuator is driven by the cleavage rod loading and unloading actuator movement driving device to be movably arranged on the multifunctional groove in the first direction; the first support arm is driven by a first power device to rotate, and the second support arm is driven by a second power device mounted on the first gear cylinder to rotate; a first water milling drill actuator is installed on the side, away from the supporting rod, of the first support arm, and a second water milling drill actuator is installed on the side, away from the supporting rod, of the second support arm. According to the invention, the combined operation of drilling and splitting rod loading and unloading is realized, and the construction efficiency is improved.

Description

Technical Field

[0001] The present invention relates to a device for loading and unloading a multi-head water mill drill and a splitting bar after tunneling modification and a construction method thereof, belonging to the technical field of tunnel construction. Background Technique

[0002] During the process of tunnel excavation, it is often necessary to pass through areas sensitive to vibration such as bridges, historical buildings, gas pipelines, and power facilities. In order to safely pass through structures with high anti-seismic requirements at close range, only non-blasting excavation can be used. It has the advantages of small vibration and impact, environmental protection and no pollution, and precise and controllable construction, so it is widely used.

[0003] With the continuous improvement of engineering requirements, a single non-blasting excavation method often fails to meet the comprehensive requirements of high efficiency, safety, and environmental protection. By combining the technology of core drilling with a water mill drill around the perimeter and splitting the core rock mass with a hydraulic splitting bar, the efficiency of non-blasting excavation can be improved, costs can be saved, and precise and safe construction can be ensured. Conventional water mill drills are usually fixed on brackets and drilled manually, with low efficiency, low mechanization and intelligence levels, and unable to fully guarantee the safety of construction personnel. When splitting the core rock mass, it is necessary to set up an operating platform frame to install the splitting bar into the hole and split the rock mass, and then use an excavator to pry and clean the broken rock mass, repeating the process layer by layer and splitting towards the center. Each cycle requires moving the operating platform frame, wasting time, and when removing the splitting bar after splitting the rock mass, broken rock mass will fall, threatening the personal safety of construction personnel. Patent CN119288526A invented a retractable multi-head water mill drill for tunnel construction, which solved problems such as the need for frequent disassembly and installation of brackets, but this device cannot flexibly adjust the distance between each water mill drill, making it difficult to achieve the ideal state of four water mill drills operating simultaneously. Especially when drilling holes on the arc edge, at most only two water mill drills can be opened simultaneously, greatly limiting the efficiency; on the other hand, this device is not easy to move. After completing a vertical hole drilling, it needs to be disassembled and fixed again, making it difficult to meet the requirements of high-efficiency construction; secondly, the height of the support column cannot be adjusted, making it difficult to apply to tunnels with different diameters, reducing the versatility and application range of this device.

[0004] In summary, it is necessary to develop and design a water mill drill and a device for loading and unloading a hydraulic splitting bar to solve the above technical problems, improve construction efficiency and drilling accuracy, fully guarantee the personal safety of construction personnel, enhance the level of mechanization and intelligence, and reduce equipment costs and personnel input. Summary of the Invention

[0005] Considering non-blasting construction in environmentally sensitive areas, improving the level of mechanization and intelligence, enhancing the construction efficiency and drilling accuracy of non-blasting excavation, fully guaranteeing the personal safety of construction personnel, and saving construction costs and shortening the construction period, the present invention provides a device for loading and unloading a multi-head water mill drill and a splitting bar after tunneling modification and a construction method thereof.

[0006] The technical solution of the present invention is as follows:

[0007] According to a first aspect of the present invention, there is provided a device for loading and unloading a multi-head water mill drill and a splitting bar for tunneling excavation and modification, including a fixed base 2, a first support arm 3, a second support arm 4, a splitting bar loading and unloading device 5, a first water mill drill actuator, a first power device 6, a second power device 7, a support block 8, a support rod 9, and a second water mill drill actuator; the splitting bar loading and unloading device 5 includes a mounting frame, a splitting bar loading and unloading actuator, a splitting bar loading and unloading actuator moving driving device, and a multi-functional groove 56. The mounting frame is provided with the splitting bar loading and unloading actuator moving driving device and the multi-functional groove 56. The splitting bar loading and unloading actuator is driven by the splitting bar loading and unloading actuator moving driving device to be movably arranged along a first direction on the multi-functional groove 56; one end face of the support rod 9 is vertically connected to one side of the fixed base 2, and the other end face of the support rod 9 is vertically connected to one side of the support block 8; the mounting frame is fixed in a direction perpendicular to the outer circumference of the support rod 9 upward, so that the plane formed by the axis of the splitting bar loading and unloading actuator and the axis of the support rod 9 is perpendicular to the heading face; the distance between the support block 8 and the heading face is smaller than the distance between the multi-functional groove 56 and the heading face; a first power device 6 is also fixedly installed on the outer circumference of the support rod 9, and a first gear cylinder 301 in the first support arm 3 is sleeved thereon; the first support arm 3 is driven to rotate by the first power device 6, and the second support arm 4 is driven to rotate by a second power device 7 installed on the first gear cylinder 301; the first water mill drill actuator is installed on one side of the first support arm 3 away from the support rod 9, and the second water mill drill actuator is installed on one side of the second support arm 4 away from the support rod 9; and in the initial state, the end faces of the first water mill drill actuator and the second water mill drill actuator on the side close to the heading face are in the same plane.

[0008] Further, the first support arm 3 includes a first gear cylinder 301 and a first telescopic rod 302. A first gear is installed at one end of the first gear cylinder 301 close to the first power device 6. The first power device 6 controls the rotation angle of the first gear cylinder 301 around the support rod 9 by meshing with the first gear through a third gear; one end of two parallelly arranged first telescopic rods 302 is fixed to the first gear cylinder 301, and the other end of the two first telescopic rods 302 installs the first water mill drill actuator; the second support arm 4 includes a first shaft sleeve 401, a second telescopic rod 402, and a second shaft sleeve 403. The first shaft sleeve 401 and the second shaft sleeve 403 are sleeved on the first gear cylinder 301. A second gear is provided on one side of the first shaft sleeve 401. The second power device 7 controls the rotation angle of the second support arm 4 by meshing with the second gear through a fourth gear; one end of two parallelly arranged second telescopic rods 402 is respectively fixed to the first shaft sleeve 401 and the second shaft sleeve 403, and the other end of the two second telescopic rods 402 installs the second water mill drill actuator through a rotating device.

[0009] Further, the first water mill drill actuator and the second water mill drill actuator have the same structure. The first water mill drill actuator includes a second-direction movement driving device, a first-direction movement driving device, a guide rail 305, a water mill drill motor 308, and a drill barrel 310. The second-direction movement driving device is installed at the first branch end of the first support arm 3. The second-direction movement driving device includes a second driving motor 313, a bidirectional ball screw 314, a bidirectional ball screw mounting seat, and a second slider. The rotation of the bidirectional ball screw 314 in the bidirectional ball screw mounting seat is driven by the second driving motor 313. The rotation of the bidirectional ball screw 314 drives two first-direction movement driving devices connected to the bidirectional ball screw 314 via the second slider to move away from or close to each other in the second direction at the same time. The first-direction movement driving device includes a first driving motor 306, a first slide rail 307, a first slider 309, and a first ball screw 304. One end of the first slide rail 307 is fixed to the second slider in the second-direction movement driving device, and the other end of the first slide rail 307 is matched with the support at the second branch end of the first support arm 3 through the guide rail 305 arranged in the second direction. The first ball screw 304 is installed in the first slide rail 307, and the first slider 309 slidably matched with the first slide rail 307 is installed on the first ball screw 304. The rotation of the first ball screw 304 is driven by the first driving motor 306, so that the first slider 309 drives the water mill drill motor 308 fixed on the first slider 309 and the drill barrel 310 driven by the water mill drill motor 308 to move together in the first direction. The water mill drill motor 308 drives the drill barrel 310 to perform a rotational movement.

[0010] Further, the first water mill drill actuator and the second water mill drill actuator further include a fixing ring 311, a water spray pipe 312, and a stopper 315. The fixing ring 311 is connected to the stopper 315. The stopper 315 is directly fixed to one end of the first slide rail 307 close to the heading face. The water spray pipe 312 is fixed to the periphery of the fixing ring 311 and has a spacing from the drill barrel 310. The water spray pipe 312 is externally connected to a water supply device.

[0011] Further, the actuator moving drive device for the splitting rod loading and unloading includes a third slider 52, a second ball screw 53, a second slide rail 54, and a third drive motor 55; the third drive motor 55 is installed on the mounting frame, drives the second ball screw 53 to rotate, and through the rotation of the second ball screw 53, the third slider 52 slidably engaged with the second slide rail 54 is movably arranged along the first direction; the splitting rod loading and unloading actuator includes a three-jaw clamping mechanism 51 and a fourth drive motor 57, the fourth drive motor 57 is used to drive the three-jaw clamping mechanism 51 to perform an opening and closing movement in the radial direction, the three-jaw clamping mechanism 51 is connected to the third slider 52, and the splitting rod loading and unloading actuator is driven to move along with the movement of the third slider 52; one end of the multi-functional groove 56 is a cylindrical structure, and a semi-cylindrical structure extends along the first direction on one side of the cylindrical structure, and a chute is provided in the semi-cylindrical structure along the first direction.

[0012] Further, the three-jaw clamping mechanism 51 includes three jaw heads 514, one of the three jaw heads 514 is engaged with the chute, one end of the three jaw heads 514 is used as a clamping end, and the other ends of the three jaw heads 514 are respectively rotatably engaged with one end of a mechanical link 513 and one end of a first connection block 515. The other end of the first connection block 515 and the middle of the mechanical link 513 are rotatably engaged with the ear plates on a three-jaw fixed support 517. The other end of the mechanical link 513 extends into the three-jaw fixed support 517 and is rotatably engaged with one end of a second connection block 516. The other end of the second connection block 516 is rotatably engaged with a nut seat 512 mounted on a third ball screw 511. One end of the third ball screw 511 is connected to the fourth drive motor 57. By driving the fourth drive motor 57 to rotate, the third ball screw 511 is driven to rotate, so that the nut seat 512 moves along the first direction, and the three jaw heads 514 are driven to clamp and loosen through the movement of the nut seat 512 along the first direction.

[0013] According to the second aspect of the present invention, a construction method for a tunnel excavation multi-head water mill drill and a splitting rod loading and unloading device is provided, including the following steps:

[0014] S1. Mark the positions of the peripheral holes and splitting holes on the tunnel face to be excavated;

[0015] S2. Fix the fixed base 2 to an external drive device; drive the three-jaw clamping mechanism 51 and the fourth drive motor 57 along the multi-functional groove 56 provided on the multi-functional groove 56 to move to one end of the multi-functional groove 56 close to the fixed base 2 through the third drive motor 55, and keep the splitting rod loading and unloading device 5 directly above the support rod 9;

[0016] S3. Connect an external water supply device to the water spray pipes 312 of the first water mill drill actuator and the second water mill drill actuator;

[0017] S4. Through the operation unit drive device, move the tunnel excavation multi-head water mill drill and the splitting rod loading and unloading device to the position of the center of the circular arc of the heading face, and make the support block 8 directly contact the heading face; divide the peripheral holes of the heading face into the peripheral holes of the circular arc side, the peripheral holes of the two side edges, and the peripheral holes of the bottom edge, and drill the peripheral holes of the circular arc side of the heading face, the peripheral holes of the two side edges of the heading face, the peripheral holes of the bottom edge of the heading face, and the splitting holes respectively.

[0018] Further, for the drilling of the peripheral holes on the circular arc side of the heading face, specifically: through the second drive motor 313 in the first water mill drill actuator and the second water mill drill actuator, adjust the distance between the two drill cylinders 310 on the first support arm 3 and the second support arm 4 to d - 2c; where d is the diameter of the drill cylinder 310 and c is the overlapping length of adjacent peripheral holes; rotate the third stepping motor 405 to make the bidirectional ball screw 314 in the second direction movement drive device in the second water mill drill actuator perpendicular to the second telescopic rod 402 in the second support arm 4; through the first power device 6 and the second power device 7, rotate the first support arm 3 and the second support arm 4 to both sides of the splitting rod loading and unloading device 5 respectively, and they are in the limit position in the closest state, and align the drill cylinder 310 with the peripheral holes on the circular arc side, so that there is an interval of one hole between the first water mill drill actuator and the second water mill drill actuator during the two drillings. After the drilling is completed, start the first power device 6 and the second power device 7 to rotate the first support arm 3 and the second support arm 4 downward by an angle of θ each time for the next drilling. After one cycle is completed, readjust the position and perform the second cycle at the same angle. The remaining holes on the circular arc after the second cycle are used as the first peripheral holes to be drilled;

[0019] For the drilling of the peripheral holes on the two side edges of the heading face, specifically: adjust the lengths of the first telescopic rod 302 in the first support arm 3 and the second telescopic rod 402 in the second support arm 4 so that the vertical distance from the center of the first gear cylinder 301 to the center of any drill cylinder 310 in the first water mill drill actuator and the vertical distance from the center of the second gear cylinder 401 to the center of any drill cylinder 310 in the second water mill drill actuator are half of the tunnel span, and adjust through the first power device 6 and the second power device 7 so that the first telescopic rod 302 and the second telescopic rod 402 are parallel to the heading face, and keep the center of the support block 8 on the center line of the heading face. Align the drill cylinder 310 with the holes on the side of the heading face, and use the method of leaving an interval of one hole between the first water mill drill actuator and the second water mill drill actuator during the two drillings. Drill simultaneously on the two side edges, and the distance moved downward each time is 4(d - c). After one cycle is completed, perform the second cycle at the same downward movement distance. The remaining holes on the two side edges after the second cycle are used as the second peripheral holes to be drilled;

[0020] Drill the peripheral holes around the bottom edge of the heading face, specifically: Adjust the angle between the first telescopic rod 302 in the first support arm 3 and the second telescopic rod 402 in the second support arm 4 to α through the first power device 6 and the second power device 7, and the first telescopic rod 302 is vertically downward, satisfying the vertical distance from the midpoint of the line connecting the centers of the two drill cylinders 310 in the second water mill drill actuator to the center of the second gear cylinder 401 wherein, l1 is the vertical distance from the midpoint of the line connecting the centers of the two drill cylinders 310 in the first water mill drill actuator to the center of the first gear cylinder 301; Adjust the angle between the working plane of the second water mill drill actuator and the second telescopic rod 402 to 90 - α through the third stepping motor 405, so that the two drill cylinders 310 of the first water mill drill actuator and the drill cylinders 310 of the second water mill drill actuator are on the same horizontal line. Adopt the method of leaving one hole between two drillings for the first water mill drill actuator and the second water mill drill actuator to drill. Move 8(d - c) from one side of the bottom edge to the other side each time to complete one cycle, and perform the second cycle with the same side shift distance. The remaining holes at the bottom edge after the second cycle are used as the third peripheral holes to be drilled.

[0021] Furthermore, drill the first peripheral hole to be drilled, the second peripheral hole to be drilled, and the third peripheral hole to be drilled by drilling each single peripheral hole.

[0022] Furthermore, drill the splitting holes, specifically: Adjust the lengths of the first telescopic rod 302 in the first support arm 3 and the second telescopic rod 402 in the second support arm 4, so that the vertical distance from the center of the first gear cylinder 301 to the center of any drill cylinder 310 in the first water mill drill actuator and the vertical distance from the center of the second gear cylinder 401 to the center of any drill cylinder 310 in the second water mill drill actuator are less than half of the tunnel span. Rotate the first support arm 3 to the horizontal direction through the first power device 6, and adjust the vertical distance l2 from the midpoint of the line connecting the centers of the two drill cylinders 310 in the second water mill drill actuator to the center of the second gear cylinder 401 according to wherein, a is the row spacing of the splitting holes, l1 is the vertical distance from the midpoint of the line connecting the centers of the two drill cylinders 310 in the first water mill drill actuator to the center of the first gear cylinder 301, and d is the diameter of the drill cylinder 310; Rotate the second support arm 4 through the second power device 7 to make the angle between the second telescopic rod 402 and the first telescopic rod 302 β, and turn on the second drive motors 313 in the first water mill drill actuator and the second water mill drill actuator to adjust the distance between the two drill cylinders 310 on the first support arm 3 and the second support arm 4 to a; wherein, a is the row spacing of the splitting holes; Rotate the third stepping motor 405 to make the angle between the working plane of the second water mill drill actuator and the second telescopic rod 402 90 - β; Move the entire device to make the four drill cylinders 310 respectively correspond to 4 adjacent splitting holes on the same vertical line, and drill the splitting holes in the order from top to bottom and from left to right by starting four / three / two / one drill cylinder 310 at the same time.

[0023] The beneficial effects of the present invention are as follows:

[0024] 1. Through a reasonable layout method, the present invention assembles multiple water mill drills and a splitting bar loading and unloading device, enabling the same device to complete the key construction steps of non-blasting excavation. The device is fixed to an existing excavator through an interface device. The excavator can flexibly control the angle, eliminating the need to set up an operation platform for drilling and loading / unloading the splitting bar, and also eliminating the need to purchase special water mill drill trolleys and hydraulic splitting trolleys. This improves the mechanization level and construction efficiency, ensures the safety of construction personnel, saves construction costs, and can adjust the lengths of the two brackets through telescopic rods to adapt to tunnels with different diameters.

[0025] 2. The present invention can arrange four water mill drills on two brackets. The rotation angles of the two bracket arms can be controlled by two power devices. The distance between the two water mill drills on the same bracket can be adjusted by a second driving motor and a bidirectional ball screw. Through the coordinated adjustment of the excavator, two power devices, a driving motor, and a stepping motor, the water mill drills can be quickly and accurately moved to the marked position. After the water mill drills reach the designated position, multiple water mill drills will simultaneously start automatic drilling through the driving motor and the ball screw, and the rotation speed and drilling speed of the water mill drills will be dynamically adjusted according to the hardness of the rock mass in front of the heading face. This can reduce equipment wear, save energy and reduce consumption, and improve the drilling efficiency. When a stroke is completed (the first slider reaches the limiter), the water mill drills will automatically retract, improving the degree of automation and reducing the input of construction personnel.

[0026] 3. During the actual construction process, when multiple water mill drills are drilling simultaneously, a relatively high requirement is placed on the flatness of the heading face to ensure the drilling angle and keep the water mill drills drilling in a horizontal direction at all times. By connecting a torque sensor between the first driving motor and the first ball screw, when drilling, first start the first driving motor. After the drill barrel of the water mill drill touches the heading face, the value of the torque sensor will increase rapidly. After being processed by the connected external controller, the first driving motor will be automatically turned off. After all the working water mill drills touch the heading face, the water mill drill motor will be automatically started to ensure that all the working water mill drills start drilling simultaneously. This can not only ensure uniform force on the device and prevent the drill bit from deflecting, but also reduce the requirement for the flatness of the heading face, simplify the construction process, shorten the construction period, and reduce costs.

[0027] 4. By combining a three-jaw clamping device with a chute, automatic loading and unloading of the hydraulic splitting bar can be achieved through a simple design. After the splitting bar is clamped, the fourth driving motor and the torque sensor will automatically stop loading. The third driving motor drives the second ball screw, and the splitting bar is loaded into and taken out of the splitting hole using mechanical transmission, enabling precise control of the clamping force and the position of the splitting bar, and improving the safety of the operation. Description of the Drawings

[0028] Figure 1 is the usage state diagram of the present invention;

[0029] Figure 2 is the structural schematic diagram of the present invention;

[0030] Figure 3 is the structural schematic diagram of the first support arm and the first water mill drill actuator of the present invention;

[0031] Figure 4 is the structural schematic diagram of the second support arm and the second water mill drill actuator of the present invention;

[0032] Figure 5 is the structural schematic of the splitting rod loading and unloading device of the present invention Figure 1 ;

[0033] Figure 6 is the structural schematic of the splitting rod loading and unloading device of the present invention Figure 2 ;

[0034] Figure 7 is the assembly structural schematic of the three-jaw clamping mechanism of the present invention Figure 1 ;

[0035] Figure 8 is the exploded structural schematic of the three-jaw clamping mechanism of the present invention Figure 2 ;

[0036] Figure 9 is the layout diagram of the peripheral holes and splitting holes of the present invention;

[0037] Figure 10 is the schematic diagram of the principle of drilling peripheral holes of the present invention;

[0038] Figure 11 is the schematic diagram of the principle of drilling splitting holes of the present invention.

[0039] The reference numerals in the figure are as follows: 1, excavator; 2, fixed base; 3, first support arm; 4, second support arm; 5, splitting rod loading and unloading device; 6, first power device; 7, second power device; 8, support block; 9, support rod; 301, first gear cylinder; 302, first telescopic rod; 303, positioning hole; 304, first ball screw; 305, guide rail; 306, first driving motor; 307, first slide rail; 308, water mill drill motor; 309, first slider; 310, drill cylinder; 311, fixing ring; 312, water spray pipe; 313, second driving motor; 314, bidirectional ball screw; 315, limiter; 401, first bushing; 402, second telescopic rod; 403, second bushing; 404, rotating shaft; 405, third power device; 406, second support; 51, three-jaw clamping mechanism; 52, third slider; 53, second ball screw; 54, second slide rail; 55, third driving motor; 56, multi-functional groove; 57, fourth driving motor; 511, third ball screw; 512, nut seat; 513, mechanical connecting rod; 514, claw head; 515, first connecting block; 516, second connecting block; 517, three-jaw fixed support. Specific embodiments

[0040] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other arbitrarily.

[0041] Example 1: As Figures 1 - 11 shown, according to the first aspect of the embodiments of the present invention, a tunnel excavation and conversion multi-head water mill drill and splitting rod loading and unloading device is provided, including a fixed base 2, a first support arm 3, a second support arm 4, a splitting rod loading and unloading device 5, a first water mill drill actuator, a first power device 6, a second power device 7, a support block 8, a support rod 9, and a second water mill drill actuator;

[0042] The splitting rod loading and unloading device 5 includes an installation frame, a splitting rod loading and unloading actuator, a splitting rod loading and unloading actuator moving driving device, and a multi-functional groove {56}. The installation frame is provided with a splitting rod loading and unloading actuator moving driving device and a multi-functional groove {56}. The splitting rod loading and unloading actuator is driven by the splitting rod loading and unloading actuator moving driving device to be movably arranged along a first direction on the multi-functional groove {56}.

[0043] One end face of the support rod 9 is vertically connected to one side of the fixed base 2, and the other end face of the support rod 9 is vertically connected to one side of the support block 8; on the outer periphery of the support rod 9, the mounting frame is fixed in the vertically upward direction, so that the plane formed by the axis of the splitting rod loading and unloading actuator and the axis of the support rod 9 is perpendicular to the heading face; the distance between the support block 8 and the heading face is smaller than the distance between the multi-functional groove 56 and the heading face;

[0044] On the outer periphery of the support rod 9, the first power device 6 is also fixedly installed through the first power device mounting frame, and the first gear cylinder 301 in the first support arm 3 is sleeved; the first power device 6 drives the first support arm 3 to perform a rotational motion, and the second power device 7 installed on the first gear cylinder 301 drives the second support arm 4 to perform a rotational motion;

[0045] The first water mill drill actuator is installed on the side of the first support arm 3 away from the support rod 9, and the second water mill drill actuator is installed on the side of the second support arm 4 away from the support rod 9; and in the initial state, the end faces of the first water mill drill actuator and the second water mill drill actuator on the side close to the heading face are in the same plane. In the above, the first and second power devices can adopt stepping motors or servo motors.

[0046] Further, electromagnetic brakes are connected to both the first power device 6 and the second power device 7, which can accurately control the rotation angles of the first support arm 3 and the second support arm 4 and improve the controllability.

[0047] Further, the connection between the support rod 9 and the fixed base 2 is fixed by a reinforcing rib. On the side of the support block 8 facing the heading face, there is a convex platform. One end of the convex platform facing the heading face is a sharp vertex, and the diameter gradually increases until the other end reaches the thickest part. The overall contour is a gradual transition of a straight line or a curve. When the device is working, it can be fully fixed on the heading face, increasing the stability during work and reducing the influence of drilling vibration.

[0048] Applying the above technical solution, it can be seen that by setting the distance between the support block 8 and the heading face to be smaller than the distance between the multi-functional groove 56 and the heading face, the multi-functional groove 56 can be protected from contacting the heading face; by adopting the flange-type fixed base 2, the present invention can be fixed to the interface device on the excavator 1 through bolts, so that the present invention can be conveniently and flexibly controlled by using the existing excavator 1, without the need to set up a scaffold or purchase a special trolley, improving the drilling accuracy and the degree of mechanization, fully ensuring the safety of construction personnel, and saving costs.

[0049] Further, as Figure 2 、 Figure 3As shown, the first support arm 3 includes a first gear cylinder 301 and a first telescopic rod 302. A first gear is installed at one end of the first gear cylinder 301 close to the first power device 6. The first power device 6 controls the rotation angle of the first gear cylinder 301 around the support rod 9 by meshing with the first gear through a third gear. One end of two parallelly arranged first telescopic rods 302 is fixed to the first gear cylinder 301, and a first water mill drill actuator is installed at the other end of the two first telescopic rods 302.

[0050] As Figure 4 shown, the second support arm 4 includes a first bushing 401, a second telescopic rod 402, and a second bushing 403. The first bushing 401 and the second bushing 403 are sleeved on the first gear cylinder 301. A second gear is provided on one side of the first bushing 401. The second power device 7 controls the rotation angle of the second support arm 4 by meshing with the second gear through a fourth gear. One end of two parallelly arranged second telescopic rods 402 is respectively fixed to the first bushing 401 and the second bushing 403, and a second water mill drill actuator is installed at the other end of the two second telescopic rods 402 through a rotating device.

[0051] Further, the first telescopic rod 302 and the second telescopic rod 402 have the same structure and adopt a segmented design. The adjacent two rod bodies are matched through positioning holes 303 at different positions and the length change is adjusted by bolts to be applicable to tunnels with different hole diameters. The two first telescopic rods 302 and the two second telescopic rods 402 are both connected by cross bars.

[0052] Further, the rotating device includes a second support 406, a third power device 405, and a rotating shaft 404. The rotation angle of the second support 406 is adjusted by the third power device 405 fixed on the second telescopic rod 402 to drive the rotating shaft 404. Further, the third power device 405 can adopt a stepper motor and is connected with an electromagnetic brake.

[0053] Further, as Figure 2 、 Figure 3 、 Figure 4As shown, the first water mill drill actuator and the second water mill drill actuator have the same structure. Taking the first water mill drill actuator as an example, the first water mill drill actuator includes a second-direction movement driving device, a first-direction movement driving device, a guide rail 305, a water mill drill motor 308, and a drill barrel 310. The second-direction movement driving device is installed at the first branch end of the first support arm 3 (specifically: the second-direction movement driving device is installed at the end of the first telescopic rod 302 away from the support rod 9). The second-direction movement driving device includes a second driving motor 313, a bidirectional ball screw 314, a bidirectional ball screw mounting seat, and a second slider. The second driving motor 313 drives the bidirectional ball screw 314 in the bidirectional ball screw mounting seat to rotate. The rotation of the bidirectional ball screw 314 drives the two first-direction movement driving devices connected to the bidirectional ball screw 314 via the second slider to move away from or close to each other along the second direction. The first-direction movement driving device includes a first driving motor 306, a first slide rail 307, a first slider 309, and a first ball screw 304. One end of the first slide rail 307 is fixed to the second slider in the second-direction movement driving device, and the other end of the first slide rail 307 is fitted with the support at the second branch end of the first support arm 3 via the guide rail 305 arranged along the second direction (the second branch end is the end of the second telescopic rod 302 away from the support rod 9). The first ball screw 304 is installed in the first slide rail 307, and the first slider 309 slidably fitted with the first slide rail 307 is installed on the first ball screw 304. The rotation of the first ball screw 304 driven by the first driving motor 306 causes the first slider 309 to drive the water mill drill motor 308 fixed on the first slider 309 and the drill barrel 310 driven by the water mill drill motor 308 to move together along the first direction. The water mill drill motor 308 drives the drill barrel 310 to rotate. In the above, the first direction and the second direction are perpendicular, and the second driving motor 313 may be connected with an electromagnetic brake.

[0054] Further, as Figure 3 , Figure 4 shown, the first water mill drill actuator and the second water mill drill actuator further include a fixing ring 311, a water spray pipe 312, and a stopper 315. The fixing ring 311 is connected to the stopper 315. The stopper 315 is directly fixed to one end of the first slide rail 307 close to the heading face. The water spray pipe 312 is fixed around the fixing ring 311 and has a distance from the drill barrel 310. The water spray pipe 312 is externally connected to a water supply device. By spraying water, the temperature during drilling can be reduced, and the service life of the equipment can be extended. The fixing ring 311 can reduce the shaking of the drill barrel 310 during construction and improve the drilling accuracy. When the first slider 309 contacts the stopper 315, it indicates that one stroke has been completed. At this time, the first driving motor 306 adjusts the rotation direction to make the first slider 309 slide in the opposite direction, moving the drill barrel 310 out of the heading face and entering the next cycle.

[0055] In the above technical solution, through the coordinated action of the first power device 6, the second power device 7, the second drive motor 313, the third stepping motor 405 and the excavator 1, the drill barrel 310 of the water mill drill can be quickly and accurately aligned with the marked drilling position on the heading face. Further, torque sensors are connected between the first drive motor 306 and the first ball screw 304, and between the output end of the rotating shaft of the water mill drill motor 308 and the drill barrel 310. When drilling, first, reasonably plan the number of water mill drill constructions according to the drilling position. By connecting to an external controller, first turn on the first drive motor 306 to make the drill barrel 310 quickly contact the heading face. At this time, the torque increases rapidly, and the continuous advancement of the drill barrel 310 is stopped. After all the drill barrels 310 under construction have contacted the heading face, turn on the water mill drill motor 308 and the water spray pipe 312, and turn on the first drive motor 306 to continue to push the water mill drill forward in front of the heading face; during the drilling process, according to the rock mass conditions in front of the heading face, automatically adjust the rotation speeds of the water mill drill motor 308 and the first drive motor 306: when the rock mass in front is relatively broken, the value of the torque sensor will decrease. At this time, the rotation speeds of the water mill drill motor 308 and the first drive motor 306 will be automatically increased to improve the drilling speed; when the hardness of the surrounding rock mass in front is relatively high, the value of the torque sensor will increase. At this time, to protect the water mill drill motor 308 and the drill barrel 310, the rotation speeds of the water mill drill motor 308 and the first drive motor 306 will be reduced to lower the drilling speed. The rotation speeds of the water mill drill motor 308 and the first drive motor 306 are dynamically adjusted according to the rock mass conditions throughout the process, achieving the purpose of reducing equipment wear, reducing the risk of equipment failure, saving energy and reducing consumption, and improving the drilling efficiency.

[0056] Further, as Figures 5 - 6 shown, the splitting rod loading and unloading actuator moving drive device includes a third slider 52, a second ball screw 53, a second slide rail 54, and a third drive motor 55; the third drive motor 55 is installed on the mounting frame, drives the second ball screw 53 to rotate through the third drive motor 55, and makes the third slider 52 slidingly engaged with the second slide rail 54 movably disposed along the first direction through the rotational movement of the second ball screw 53;

[0057] The splitting rod loading and unloading actuator includes a three-jaw clamping mechanism 51 and a fourth drive motor 57. The fourth drive motor 57 is used to drive the three-jaw clamping mechanism 51 to perform an opening and closing movement in the radial direction. The three-jaw clamping mechanism 51 is connected to the third slider 52, and drives the splitting rod loading and unloading actuator to move along with the movement of the third slider 52;

[0058] One end of the multi-functional groove 56 is a cylindrical structure, and a semi-cylindrical structure extends along the first direction on one side of the cylindrical structure. A chute is provided in the semi-cylindrical structure along the first direction.

[0059] Furthermore, the width of the groove opened at the bottom of the multi-functional groove 56 can be set to be greater than the maximum width of the mechanical connecting rod 513, facilitating the free clamping and loosening of the three-jaw clamping mechanism 51.

[0060] Applying the above technical solution, it can be seen that the splitting rod loading and unloading device 5 is directly fixed above the support rod 9 through the mounting frame. The third driving motor 55 drives the second ball screw 53 to rotate, so that the third slider 52 linearly slides on the second slide rail 54. The third slider 52 drives the three-jaw clamping mechanism 51 to linearly move on the multi-functional groove 56, thereby realizing the process of loading and unloading the splitting rod. The multi-functional groove 56 is in a semi-cylindrical shape, which can maximize the prevention of the splitting rod from falling due to equipment vibration during the loading and unloading process, and at the same time facilitate the placement of the splitting rod into the multi-functional groove 56. One end of the multi-functional groove 56 close to the fixed base 2 is in a cylindrical structure. When drilling, the splitting rod loading and unloading device does not work, which facilitates the three-jaw clamping mechanism 51 to approach the cylindrical structure end of the fixed base 2 so that one end of the three-jaw clamping mechanism 51 extends into the cylindrical structure. Moreover, the third driving motor 55 is equipped with an electromagnetic brake to prevent the three-jaw clamping mechanism 51 from sliding randomly, avoiding the separation of the three-jaw clamping mechanism 51 from the multi-functional groove 56 due to the rotation of the entire device during drilling, reducing the input of construction personnel and ensuring safe construction.

[0061] Furthermore, as Figures 7 - 8 shown, the three-jaw clamping mechanism 51 includes three jaw heads 514. One of the three jaw heads 514 cooperates with the chute. One end of the three jaw heads 514 serves as a clamping end. The other ends of the three jaw heads 514 are respectively rotationally matched with one end of the mechanical connecting rod 513 and one end of the first connecting block 515. The other end of the first connecting block 515 and the middle of the mechanical connecting rod 513 are rotationally matched with the ear plates on the three-jaw fixed support 517. The other end of the mechanical connecting rod 513 extends into the three-jaw fixed support 517 and is rotationally matched with one end of the second connecting block 516. The other end of the second connecting block 516 is rotationally matched with the nut seat 512 mounted on the third ball screw 511. One end of the third ball screw 511 is connected to the fourth driving motor 57. By rotating the fourth driving motor 57 to drive the third ball screw 511 to rotate, the nut seat 512 moves in the first direction. By the movement of the nut seat 512 in the first direction, the three jaw heads 514 are driven to clamp and loosen. During the clamping and loosening processes of the three jaw heads 514, they all remain parallel, maximizing the contact surface between the jaw heads 514 and the splitting rod. There are many tooth-shaped patterns on the surface of the jaw heads 514, increasing the friction force when clamping the splitting rod.

[0062] During specific application, the fourth driving motor 57 can be connected with an electromagnetic brake and a torque sensor is connected between the fourth driving motor 57 and the third ball screw 511. During operation, first, the excavator 1 adjusts the device to a certain height to facilitate the construction workers to place the splitting rod into the multi-functional groove 56. Subsequently, the external controller is used to start the fourth driving motor 57, so that the three claw heads 514 clamp the hydraulic splitting rod. After clamping, the value of the torque sensor increases rapidly. At this time, the clamping will automatically stop and the fourth driving motor 57 will be automatically turned off. The multi-functional groove 56 is aligned with the splitting hole by controlling the excavator 1. The third driving motor 55 is started, and the third slider 52 drives the three-claw clamping mechanism 51 to move towards the heading face. When the splitting rod reaches the bottom of the hole, the value of the torque sensor increases rapidly, and the fourth driving motor 57 automatically rotates in the opposite direction, and the claw heads 514 are loosened. Subsequently, the third driving motor 55 also rotates in the opposite direction, and the three-claw clamping mechanism 51 slides backward, that is, one loading is completed, and the loading cycle of the next splitting rod is entered. The whole process requires the whole device to be kept horizontal; after splitting the rock mass, first, the excavator 1 is operated to align the multi-functional groove 56 with the splitting hole, and the third driving motor 55 and the fourth driving motor 57 are started. While the three-claw clamping mechanism 51 moves towards the splitting rod, the claw heads 514 are loosened. After the end face of the three-claw fixed support 517 contacts the splitting rod, the fourth driving motor 57 will be automatically started, and the three claw heads 514 clamp it. The third driving motor 55 rotates in the opposite direction, and the third slider 52 drives the three-claw fixed support 517 to slide backward along the second slide rail 54, and the splitting rod is taken out from the heading face until the whole splitting rod enters the multi-functional groove 56. The excavator 1 is controlled to move the device to a suitable height, and the three-claw clamping mechanism 51 is loosened by controlling the fourth driving motor 57, and the splitting rod is taken out from the multi-functional groove 56.

[0063] As Figures 1 - 11 shown, according to the second aspect of the embodiment of the present invention, a construction method of a tunnel excavation and modification multi-head wet diamond drill and splitting rod loading and unloading device is provided, including the following steps:

[0064] S1. Mark the positions of the perimeter holes and splitting holes on the heading face of the tunnel to be excavated;

[0065] In order to form a continuous free face for the perimeter holes, a form of an overlapping circle is adopted (exemplarily, the overlap between two holes is 2 cm).

[0066] Further, the following optional parameters are given: the diameter of the drill barrel 310 is 16 cm, the distance between the centers of two adjacent perimeter holes is 14 cm; the diameter of the splitting hole is 16 cm, the lateral spacing between adjacent splitting holes is 40 cm, and the vertical row spacing is also 40 cm; the span of the portal-shaped tunnel is 6 m and the height is 6.6 m, then 200 perimeter holes need to be drilled.

[0067] S2. Fix the fixed base 2 to the excavator 1 using bolts; control the third drive motor 55 through an external controller, and drive the three-jaw clamping mechanism 51 and the fourth drive motor 57 to move along the multifunctional groove 56 opened on the multifunctional groove 56 to one end of the multifunctional groove 56 close to the fixed base 2, and keep the splitting rod loading and unloading device 5 directly above the support rod 9;

[0068] S3. Connect the external water supply device to the water spray pipes 312 of the first water mill drill actuator and the second water mill drill actuator;

[0069] S4. Operate the excavator 1 to move the tunnel excavation converted multi-head water mill drill and the splitting rod loading and unloading device to the center position of the face arc, and make the support block 8 directly contact the face; adjust the first power device 6, the second power device 7, the third stepping motor 405 and the second drive motor 313 of the first water mill drill actuator and the second water mill drill actuator through the external controller to adjust the positions of the first water mill drill actuator and the second water mill drill actuator.

[0070] Divide the peripheral holes of the face into arc-side peripheral holes, side-edge peripheral holes, and bottom-edge peripheral holes (for illustrative purposes only and not for limitation, for example, Figure 9 the peripheral holes on the black dotted line are arc-side peripheral holes, the peripheral holes on the blue line are side-edge peripheral holes, the peripheral holes on the red line are bottom-edge peripheral holes, and the holes where the two lines overlap are determined according to construction convenience), and drill the arc-side peripheral holes of the face, the side-edge peripheral holes of the face, the bottom-edge peripheral holes of the face, and the splitting holes respectively. Specifically:

[0071] Drilling of the arc-side peripheral holes of the face: Adjust the distance between the two drill barrels 310 on the first support arm 3 and the second support arm 4 to d - 2c through the second drive motor 313 in the first water mill drill actuator and the second water mill drill actuator; where d is the diameter of the drill barrel 310 and c is the overlapping length of adjacent peripheral holes; rotate the third stepping motor 405 to make the bidirectional ball screw 314 in the second direction movement drive device in the second water mill drill actuator perpendicular to the second telescopic rod 402 in the second support arm 4; rotate the first support arm 3 and the second support arm 4 to both sides of the splitting rod loading and unloading device 5 through the first power device 6 and the second power device 7, and they are at the limit positions in the closest state, and align the drill barrel 310 with the uppermost arc-side peripheral hole, so that there is an interval of one hole between the first water mill drill actuator and the second water mill drill actuator during two drillings. After the drilling is completed, start the first power device 6 and the second power device 7 to rotate the first support arm 3 and the second support arm 4 downward by an angle of Space the first water jet drill actuator and the second water jet drill actuator by one hole between two drill holes until reaching the lowest arc edge peripheral hole that meets the conditions, completing one cycle; after completing one cycle, readjust the position and perform a second cycle at the same angle. The remaining holes on the arc after the second cycle are used as the first peripheral holes to be drilled; where l is the vertical distance from the center of the first gear cylinder 301 to the center of any drill cylinder 310 in the first water jet drill actuator / the vertical distance from the center of the second gear cylinder 401 to the center of any drill cylinder 310 in the second water jet drill actuator;

[0072] Drilling of peripheral holes on both sides of the tunnel face: Adjust the lengths of the first telescopic rod 302 in the first support arm 3 and the second telescopic rod 402 in the second support arm 4 so that the vertical distance from the center of the first gear cylinder 301 to the center of any drill cylinder 310 in the first water jet drill actuator and the vertical distance from the center of the second gear cylinder 401 to the center of any drill cylinder 310 in the second water jet drill actuator are half of the tunnel span. Then, through the first power device 6 and the second power device 7, adjust to make the first telescopic rod 302 and the second telescopic rod 402 parallel to the tunnel face, and keep the center of the support block 8 on the center line of the tunnel face. Align the drill cylinder 310 with the hole on the side of the tunnel face, and use the method of spacing the first water jet drill actuator and the second water jet drill actuator by one hole between two drill holes for drilling. Drill simultaneously on both sides, with the distance of each downward movement being 4(d - c). After completing one cycle, perform a second cycle with the same downward movement distance. The remaining holes on both sides after the second cycle are used as the second peripheral holes to be drilled;

[0073] Drilling of peripheral holes on the bottom edge of the tunnel face: Keep the length of the first support arm 3 unchanged, and through the first power device 6 and the second power device 7, adjust the included angle between the first telescopic rod 302 in the first support arm 3 and the second telescopic rod 402 in the second support arm 4 to be and the first telescopic rod 302 is vertically downward, satisfying the vertical distance from the midpoint of the line connecting the centers of the two drill cylinders 310 in the second water jet drill actuator to the center of the second gear cylinder 401 where l1 is the vertical distance from the midpoint of the line connecting the centers of the two drill cylinders 310 in the first water jet drill actuator to the center of the first gear cylinder 301; Adjust the included angle between the working plane of the second water jet drill actuator and the second telescopic rod 402 to be 90 - α (the working plane is the plane formed by the central axes of the two first gear cylinders 31 in the second water jet drill actuator) through the third stepping motor 405, so that the two drill cylinders 310 of the first water jet drill actuator and the drill cylinders 310 of the second water jet drill actuator are on the same horizontal line. Use the method of spacing the first water jet drill actuator and the second water jet drill actuator by one hole between two drill holes for drilling. Complete one cycle by laterally moving 8(d - c) from one side of the bottom edge to the other side each time, and perform a second cycle with the same lateral movement distance. The remaining holes on the bottom edge after the second cycle are used as the third peripheral holes to be drilled;

[0074] For the first peripheral hole to be drilled, the second peripheral hole to be drilled, and the third peripheral hole to be drilled, a single peripheral hole drilling method is used for drilling.

[0075] Splitting hole drilling: Adjust the lengths of the first telescopic rod 302 in the first support arm 3 and the second telescopic rod 402 in the second support arm 4 so that the vertical distance from the center of the first gear cylinder 301 to the center of any drill cylinder 310 in the first water jet drill actuator and the vertical distance from the center of the second gear cylinder 401 to the center of any drill cylinder 310 in the second water jet drill actuator are less than half of the tunnel span to avoid drilling blind spots. Rotate the first support arm 3 to the horizontal direction through the first power device 6 (taking Figure 9 the perspective of... as an example, when drilling one or more columns on the left, the tunnel modified multi-head water jet drill and the splitting rod loading and unloading device face the working face. Taking the working face as the front view, the first support arm 3 rotates to the right side of the support rod 9; conversely, for one or more columns on the right, the first support arm 3 rotates to the left side of the support rod 9. By this method, the problem of interference caused by the limited area on the periphery of the working face can be avoided), and adjust the vertical distance l2 from the midpoint of the connection line between the centers of the two drill cylinders 310 in the second water jet drill actuator to the center of the second gear cylinder 401 according to where a is the distance between two adjacent drill holes, that is, the row spacing of the splitting holes.

[0076] Rotate the second support arm 4 through the second power device 7 so that the included angle between the second telescopic rod 402 and the first telescopic rod 302 is and turn on the second drive motor 313 in the first water jet drill actuator and the second water jet drill actuator, and adjust the distance between the two drill cylinders 310 on the first support arm 3 and the second support arm 4 to a, where a is the row spacing of the splitting holes;

[0077] Rotate the third stepping motor 405 so that the working plane of the second water jet drill actuator forms an angle of 90 - β with the second telescopic rod 402;

[0078] Move the entire device so that the four drill cylinders 310 respectively correspond to 4 adjacent splitting holes on the same vertical line, and drill the splitting holes in the order from top to bottom and from left to right by starting four / three / two / one drill cylinder 310 at the same time;

[0079] It should be noted that if the aperture of the splitting hole is inconsistent with that of the peripheral hole, after the peripheral hole drilling is completed, the drill cylinder 310 conforming to the aperture of the splitting hole can be replaced. If there is a replacement, d involved in the above splitting hole drilling is the diameter of the replaced drill cylinder 310.

[0080] During the drilling process, in combination with the connected external controller, first start the first driving motor 306 to automatically move the water mill drill towards the heading face. When the drill barrel 310 contacts the heading face, stop the movement. When all the working water mill drills contact the heading face, turn on the external water supply device, and the water spray pipe 311 starts to spray water. Turn on each water mill drill motor 308 and at the same time start the first driving motor 306, and the required water mill drills drill simultaneously. During the drilling process, according to the hardness of the rock mass, dynamically adjust the rotation speeds of the water mill drill motor 308 and the driving motor 306. When the first slider 309 moves to contact the limiter 315, turn off the water mill drill motor 308, and the first driving motor 306 reverses, and the first slider 309 slides back. According to the length of the drill barrel 310, the drilling depth is about 100 cm each time. According to the situation of the rock mass ahead, the drilling time for a group of holes is about 6 - 8 minutes until all the peripheral holes and splitting holes are drilled, and then turn off the external water supply device. Gently tap the core by hand to disconnect it from the mother rock, take out the rock core. After the core taking is completed, a free face is formed by the peripheral drilling.

[0081] Adjust the device to a suitable height, manually place the splitting bar into the multi-functional groove 56, and make the claw head 514 clamp the end of the splitting bar. Adjust the excavator 1 to align the multi-functional groove 56 with the splitting hole. The three-jaw clamping mechanism 51 slowly loads the splitting bar into the splitting hole. When it reaches the bottom, automatically release the claw head 514 and move backward. Continue to load the next splitting bar in the same steps. The model of the splitting bar selected is the YGF - 3000 model. After a batch of splitting bars are loaded, turn on the hydraulic device connected to the splitting bar to split the core rock mass. After a batch of core rock mass splitting is completed, move the three-jaw clamping mechanism 51 to the end of the multi-functional groove 56 facing the heading face and release the claw head 514. Align the claw head 514 with the splitting bar. When the splitting bar contacts the three-jaw fixed support 517, the three claw heads 514 clamp the splitting bar and move backward. After the splitting bar is completely taken out, move the device of the present invention to a suitable height, release the claw head 514, and manually take out the splitting bar. Take out all the splitting bars from the rock mass in the same steps. Use a small excavator to pry down the fragmented rock mass, and transport the pried rock mass to the waste dump by a muck truck. The process of loading the splitting bar → splitting the core rock mass → taking out the splitting bar → prying down and cleaning the fragmented rock mass is repeated. Split and excavate the rock mass from the periphery to the center until all the rock mass is cleaned up and enter the next heading face. After the cyclic construction of each heading face is completed, sort out and summarize each process, propose improvement measures, and correct relevant parameters. During the construction process, use a TC-4850N-6 intelligent network blasting vibration monitor to monitor the vibration velocity and amplitude generated during construction in real time, and use a Leica electronic level to monitor the vertical settlement and differential settlement of the structure to ensure safe construction.

[0082] The specific embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A tunneling modified multi-head water mill drill and splitting rod loading and unloading device, characterized in that It includes a fixed base (2), a first support arm (3), a second support arm (4), a splitting bar loading and unloading device (5), a first water jet drill actuator, a first power device (6), a second power device (7), a support block (8), a support rod (9), and a second water jet drill actuator; The splitting bar loading and unloading device (5) includes a mounting frame, a splitting bar loading and unloading actuator, a splitting bar loading and unloading actuator moving driving device, and a multi-functional groove (56). The mounting frame is provided with a splitting bar loading and unloading actuator moving driving device and a multi-functional groove (56). The splitting bar loading and unloading actuator is driven by the splitting bar loading and unloading actuator moving driving device to be movably arranged along a first direction on the multi-functional groove (56); One end surface of the support rod (9) is perpendicularly connected to one side of the fixed base (2), and the other end surface of the support rod (9) is perpendicularly connected to one side of the support block (8); the mounting frame is fixed in the vertically upward direction on the outer periphery of the support rod (9), so that the plane formed by the axis of the splitting bar loading and unloading actuator and the axis of the support rod (9) is perpendicular to the heading face; the distance between the support block (8) and the heading face is smaller than the distance between the multi-functional groove (56) and the heading face; A first power device (6) is also fixedly installed on the outer periphery of the support rod (9), and a first gear cylinder (301) in the first support arm (3) is sleeved thereon; the first power device (6) drives the first support arm (3) to perform a rotational motion, and the second power device (7) installed on the first gear cylinder (301) drives the second support arm (4) to perform a rotational motion; A first water jet drill actuator is installed on the side of the first support arm (3) away from the support rod (9), and a second water jet drill actuator is installed on the side of the second support arm (4) away from the support rod (9); and in the initial state, the end faces on the side of the first water jet drill actuator and the second water jet drill actuator close to the heading face are in the same plane.

2. The tunnel excavation modified multi-head water jet drill and splitting bar loading and unloading device according to claim 1, wherein The first support arm (3) includes a first gear cylinder (301) and a first telescopic rod (302). A first gear is installed at one end of the first gear cylinder (301) close to the first power device (6). The first power device (6) controls the rotation angle of the first gear cylinder (301) around the support rod (9) by meshing a third gear with the first gear; one end of two parallelly arranged first telescopic rods (302) is fixed to the first gear cylinder (301), and the other end of the two first telescopic rods (302) installs a first water jet drill actuator; The second support arm (4) includes a first bushing (401), a second telescopic rod (402), and a second bushing (403). The first bushing (401) and the second bushing (403) are sleeved on the first gear cylinder (301). A second gear is provided on one side of the first bushing (401). The second power device (7) controls the rotation angle of the second support arm (4) by meshing with the second gear through a fourth gear. One ends of two parallelly arranged second telescopic rods (402) are respectively fixed to the first bushing (401) and the second bushing (403), and the other ends of the two second telescopic rods (402) are installed with a second water mill drill actuator through a rotating device.

3. The tunneling modified multi-head water mill drill and splitting bar loading and unloading device according to claim 1, characterized in that, The first water mill drill actuator and the second water mill drill actuator have the same structure. The first water mill drill actuator includes a second direction movement driving device, a first direction movement driving device, a guide rail (305), a water mill drill motor (308), and a drill cylinder (310). The second direction movement driving device is installed at the first branch end of the first support arm (3). The second direction movement driving device includes a second driving motor (313), a bidirectional ball screw (314), a bidirectional ball screw mounting seat, and a second slider. By driving the bidirectional ball screw (314) in the bidirectional ball screw mounting seat to rotate through the second driving motor (313), two first direction movement driving devices connected to the bidirectional ball screw (314) through the second slider move away from or close to each other along the second direction at the same time. The first direction movement driving device includes a first driving motor (306), a first slide rail (307), a first slider (309), and a first ball screw (304). One end of the first slide rail (307) is fixed to the second slider in the second direction movement driving device, and the other end of the first slide rail (307) is matched with the support at the second branch end of the first support arm (3) through a guide rail (305) arranged along the second direction. A first ball screw (304) is installed in the first slide rail (307), and a first slider (309) slidably matched with the first slide rail (307) is installed on the first ball screw (304). By driving the first ball screw (304) to rotate through the first driving motor (306), the first slider (309) drives the water mill drill motor (308) fixed on the first slider (309) and the drill cylinder (310) driven by the water mill drill motor (308) to move together along the first direction. The water mill drill motor (308) drives the drill cylinder (310) to perform a rotational movement.

4. The tunneling modified multi-head water mill drill and splitting rod loading and unloading device according to claim 3, characterized in that, The first water mill drill actuator and the second water mill drill actuator further include a fixing ring (311), a water spray pipe (312), and a stopper (315). The fixing ring (311) is connected to the stopper (315). The stopper (315) is directly fixed to one end of the first slide rail (307) close to the tunnel face. The water spray pipe (312) is fixed to the periphery of the fixing ring (311) and has a spacing from the drill cylinder (310). The water spray pipe (312) is externally connected to a water supply device.

5. The tunneling multi-head water mill drill and splitting bar loading and unloading device according to claim 1, characterized in that the splitting bar loading and unloading actuator moving drive device includes a third slider (52), a second ball screw (53), a second slide rail (54), and a third drive motor (55); the third drive motor (55) is installed on the mounting frame, drives the second ball screw (53) to rotate through the third drive motor (55), and makes the third slider (52) slidably engaged with the second slide rail (54) movably arranged in a first direction through the rotation of the second ball screw (53); the splitting bar loading and unloading actuator includes a three-jaw clamping mechanism (51) and a fourth drive motor (57), the fourth drive motor (57) is used to drive the three-jaw clamping mechanism (51) to perform an opening and closing movement in the radial direction, the three-jaw clamping mechanism (51) is connected to the third slider (52), and drives the splitting bar loading and unloading actuator to move along with the movement of the third slider (52); one end of the multi-functional groove (56) is a cylindrical structure, and a semi-cylindrical structure extends along the first direction on one side of the cylindrical structure, and a chute is provided in the semi-cylindrical structure along the first direction.

6. The tunneling multi-head water mill drill and splitting rod loading and unloading device according to claim 5, characterized in that, The three-jaw clamping mechanism (51) includes three jaw heads (514), one of the three jaw heads (514) is engaged with the chute, one end of the three jaw heads (514) is used as a clamping end, and the other ends of the three jaw heads (514) are respectively rotatably engaged with one end of a mechanical link (513) and one end of a first connecting block (515), the other end of the first connecting block (515) and the middle part of the mechanical link (513) are rotatably engaged with the ear plates on a three-jaw fixed support (517), the other end of the mechanical link (513) extends into the three-jaw fixed support (517) and is rotatably engaged with one end of a second connecting block (516), the other end of the second connecting block (516) is rotatably engaged with a nut seat (512) mounted on a third ball screw (511), one end of the third ball screw (511) is connected to the fourth drive motor (57), and drives the third ball screw (511) to rotate through the rotation of the fourth drive motor (57), so that the nut seat (512) moves in the first direction, and drives the three jaw heads (514) to clamp and loosen through the movement of the nut seat (512) in the first direction.

7. A construction method for a tunneling multi-head water mill drill and splitting bar loading and unloading device, comprising the following steps: S1. Mark the positions of the peripheral holes and splitting holes on the tunnel face to be excavated; S2. Fix the fixed base (2) to an external drive device; Drive the three-jaw clamping mechanism (51) and the fourth drive motor (57) to move along the multi-functional groove (56) provided on the multi-functional groove (56) to one end of the multi-functional groove (56) close to the fixed base (2) through the third drive motor (55), and keep the splitting bar loading and unloading device (5) directly above the support rod (9); S3. Connect an external water supply device to the water spray pipes (312) of the first water mill drill actuator and the second water mill drill actuator; S4. Through the operating part drive device, move the tunnel excavation multi-head water mill drill and the splitting rod loading and unloading device to the position of the center of the circular arc of the heading face, and make the support block (8) directly contact the heading face; divide the peripheral holes on the heading face into the peripheral holes on the circular arc side, the peripheral holes on the two side edges, and the peripheral holes on the bottom edge, and drill the peripheral holes on the circular arc side of the heading face, the peripheral holes on the two side edges of the heading face, the peripheral holes on the bottom edge of the heading face, and the splitting holes respectively.

8. The construction method of the tunneling and multi-head water mill drill and splitting bar loading and unloading device according to claim 7, characterized in that, The drilling of the peripheral holes on the circular arc side of the heading face is specifically as follows: Through the second drive motor (313) in the first water mill drill actuator and the second water mill drill actuator, adjust the distance between the two drill cylinders (310) on the first support arm (3) and the second support arm (4) to d - 2c; where d is the diameter of the drill cylinder (310) and c is the overlapping length of adjacent peripheral holes; rotate the third stepping motor (405) to make the bidirectional ball screw (314) in the second direction moving drive device in the second water mill drill actuator perpendicular to the second telescopic rod (402) in the second support arm (4); through the first power device (6) and the second power device (7), rotate the first support arm (3) and the second support arm (4) to both sides of the splitting rod loading and unloading device (5) respectively, and both are in the limit position in the closest state, and align the drill cylinder (310) with the peripheral hole on the circular arc side, so that there is one hole interval between the first water mill drill actuator and the second water mill drill actuator in the two drillings. After the drilling is completed, by starting the first power device (6) and the second power device (7), rotate the first support arm (3) and the second support arm (4) downward by an angle of θ each time for the next drilling. After one cycle is completed, readjust the position and perform the second cycle at the same angle. The remaining holes on the circular arc after the second cycle are used as the first peripheral holes to be drilled; The drilling of the peripheral holes on the two side edges of the heading face is specifically as follows: Adjust the lengths of the first telescopic rod (302) in the first support arm (3) and the second telescopic rod (402) in the second support arm (4) so that the vertical distance from the center of the first gear cylinder (301) to the center of any drill cylinder (310) in the first water mill drill actuator and the vertical distance from the center of the second gear cylinder (401) to the center of any drill cylinder (310) in the second water mill drill actuator are half of the tunnel span, and adjust through the first power device (6) and the second power device (7) so that the first telescopic rod (302) and the second telescopic rod (402) are parallel to the heading face, and keep the center of the support block (8) on the center line of the heading face. Align the drill cylinder (310) with the holes on the side of the heading face, and use the method of having one hole interval between the first water mill drill actuator and the second water mill drill actuator in the two drillings for drilling. The two side edges are drilled simultaneously, and the downward movement distance each time is 4(d - c). After one cycle is completed, perform the second cycle at the same downward movement distance. The remaining holes on the two side edges after the second cycle are used as the second peripheral holes to be drilled; Drilling the peripheral holes around the bottom edge of the heading face, specifically: adjusting the included angle between the first telescopic rod (302) in the first support arm (3) and the second telescopic rod (402) in the second support arm (4) to α through the first power device (6) and the second power device (7), and the first telescopic rod (302) is vertically downward, satisfying the vertical distance from the midpoint of the connection line of the centers of the two drill cylinders (310) in the second water mill drill actuator to the center of the second gear cylinder (401). Wherein, l1 is the vertical distance from the midpoint of the connection line of the centers of the two drill cylinders (310) in the first water mill drill actuator to the center of the first gear cylinder (301); adjusting the included angle between the working plane of the second water mill drill actuator and the second telescopic rod (402) to 90 - α through the third stepping motor (405) so that the two drill cylinders (310) of the first water mill drill actuator and the drill cylinders (310) of the second water mill drill actuator are on the same horizontal line. The first water mill drill actuator and the second water mill drill actuator are used to drill in a way that there is one hole interval between two drill holes. Each time, a side shift of 8(d - c) is completed from one side of the bottom edge to the other side to complete one cycle, and the second cycle is carried out with the same side shift distance. The remaining holes at the bottom edge after the second cycle are used as the third peripheral holes to be drilled.

9. The construction method of the tunneling modified multi-head water mill drill and splitting bar loading and unloading device according to claim 8, characterized in that, Drill the first peripheral holes to be drilled, the second peripheral holes to be drilled, and the third peripheral holes to be drilled by the method of drilling a single peripheral hole.

10. The construction method of the tunneling modified multi-head water mill drill and splitting rod loading and unloading device according to claim 7, characterized in that, The splitting hole drilling is specifically as follows: Adjust the lengths of the first telescopic rod (302) in the first support arm (3) and the second telescopic rod (402) in the second support arm (4) so that the vertical distance from the center of the first gear cylinder (301) to the center of any drill cylinder (310) in the first water mill drill actuator and the vertical distance from the center of the second gear cylinder (401) to the center of any drill cylinder (310) in the second water mill drill actuator are less than half of the tunnel span. Rotate the first support arm (3) to the horizontal direction through the first power device (6), and adjust the vertical distance l2 from the midpoint of the line connecting the centers of the two drill cylinders (310) in the second water mill drill actuator to the center of the second gear cylinder (401) according to where a is the row spacing of the splitting holes, l1 is the vertical distance from the midpoint of the line connecting the centers of the two drill cylinders (310) in the first water mill drill actuator to the center of the first gear cylinder (301), and d is the diameter of the drill cylinder (310). Rotate the second support arm (4) through the second power device (7) so that the angle between the second telescopic rod (402) and the first telescopic rod (302) is β, and turn on the second drive motor (313) in the first water mill drill actuator and the second water mill drill actuator to adjust the distance between the two drill cylinders (310) on the first support arm (3) and the second support arm (4) to a; where a is the row spacing of splitting holes. Rotate the third stepping motor (405) so that the angle between the working plane of the second water mill drill actuator and the second telescopic rod (402) is 90 - β. Move the entire device so that the four drill cylinders (310) respectively correspond to 4 adjacent splitting holes on the same vertical line, and drill the splitting holes in the order from top to bottom and from left to right by starting four / three / two / one drill cylinder (310) at the same time.

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