Tunnel section pipe roof drilling construction device and construction method

Abstract

The present invention provides a tunnel cross-section pipe roof drilling construction device and construction method, comprising an auxiliary telescopic rod, a main telescopic rod, a mobile platform, an angle adjustment assembly, a pipe roof, and an angle positioning assembly. The bottom ends of the auxiliary telescopic rod and the main telescopic rod are both connected to the mobile platform. The top end of the auxiliary telescopic rod is connected to an auxiliary support member for supporting the pipe roof via a ball joint. The top end of the main telescopic rod is connected to the angle adjustment assembly. The angle adjustment assembly is provided with a main support member for supporting the pipe roof and a first drive member for driving the pipe roof to rotate and drill into the tunnel. The pipe roof passes through the auxiliary support member and the main support member, respectively. The two ends of the angle positioning assembly are respectively mounted on the auxiliary support member and the main support member. The present invention adjusts the drilling angle and height by cooperating with the angle positioning assembly, resulting in a simple structure and convenient operation.

Description

Technical Field

[0001] The present invention belongs to the technical field of tunnel construction equipment, and in particular relates to a tunnel section pipe roof drilling construction device and a construction method. Background Art

[0002] With the rapid development of my country's highway projects and the increasing volume of road traffic, higher requirements are being placed on highway tunnel construction. It is foreseeable that in the coming decades, highway tunnels will enter an era of rapid development. At the same time, to meet the rapid growth of my country's transportation capacity, the scale of highway construction is also expanding. This rapid development also necessitates quality control of tunnel construction, for example, ensuring both rapid construction and stable construction.

[0003] During tunnel face construction, to avoid accidents such as collapse, drilling and modern geophysical exploration are first used to survey the geological conditions ahead of the tunnel's rock and soil excavation face. Based on the survey results, a pipe-roof structure is pre-drilled along the tunnel face for support, a process known as pipe-roof advance support. The inserted pipe-roof structure can serve as roof and sidewall support, laying a solid foundation for subsequent tunnel excavation. For the tunnel face, the pipe-roof adjustment angle is primarily determined by the surveyed rock formations. If the rock formation is relatively stable, the pipe-roof is generally drilled perpendicular to the tunnel face. If the rock formation is complex, the pipe-roof angle can be fine-tuned to maximize its support after being drilled in.

[0004] However, existing pipe-roof construction methods utilize a direct transmission connection between the drill bit and the pipe-roof. A drive mechanism drives the pipe-roof and drill bit, driving the pipe-roof directly into the tunnel. This prevents the drill bit from pre-determining the pipe-roof's drilling angle based on the tunnel's soil structure. Adjusting the angle requires manual visual inspection, but manual adjustment is inherently inaccurate. Summary of the Invention

[0005] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a tunnel pipe-roof drilling mechanism and construction method to solve the technical problems in the prior art that the drilling angle of the pipe-roof cannot be positioned in advance according to the soil structure in the tunnel, and the accuracy of manual angle adjustment is poor.

[0006] To achieve the above-mentioned objectives and other related objectives, the present invention provides a tunnel section pipe roof drilling construction device, comprising a main telescopic rod, a mobile platform, an angle adjustment assembly, a pipe roof and an angle positioning assembly, wherein the bottom end of the main telescopic rod is fixedly connected to the mobile platform, and the top end of the main telescopic rod is connected to the angle adjustment assembly, and the top of the angle adjustment assembly is hingedly provided with an adjustment frame, and the adjustment frame is provided with a support for supporting the pipe roof and a first drive member for driving the pipe roof to rotate and drill into the tunnel; the angle positioning assembly can be detachably mounted on the support to position the drilling angle of the pipe roof.

[0007] As described above, the present invention has at least the following beneficial effects:

[0008] The present invention provides an angle positioning assembly for pre-positioning the drilling angle of the pipe roof on one side of the pipe roof, and cooperates with the angle adjustment assembly and the main telescopic rod provided below the pipe roof, so that the pipe roof can reach a preset drilling angle in advance through the cooperation of the angle positioning assembly, the angle adjustment assembly and the main telescopic rod before the pipe roof is drilled. The mobile platform can move the pipe roof to the drilling position after the angle of the pipe roof is positioned, and then drill the pipe roof into the tunnel according to the positioned angle. Compared with the drilling angle of the pipe roof manually positioned in the prior art, the solution of arranging the angle positioning assembly on the support member supporting the pipe roof in the present invention can more accurately enable the pipe roof to be drilled into the tunnel at a set angle, so as to adapt to the construction of tunnel sections with complex rock formations. The construction quality of the pipe roof is high, and a more solid foundation is provided for subsequent construction. At the same time, the pipe roof drilling process will generate certain vibrations due to the resistance of the tunnel rock formation. In order to reduce the influence of the vibration on the angle positioning assembly, the angle positioning assembly can be installed when the pipe roof is positioned and removed from the support member during the pipe roof drilling process, which can prolong the service life of the angle positioning assembly and is more convenient to operate.

[0009] Preferably, the side of the support member is connected to a horizontal frame extending outward along the horizontal plane, the free end of the horizontal frame is provided with a connecting hole, the axial direction of the connecting hole is parallel to the axis of the pipe rack, and the angle positioning assembly is fixed through the connecting hole to be fixed to the horizontal frame.

[0010] Preferably, the angle positioning assembly includes a positioning rod, a signal transmitter, and a signal receiver. The positioning rod is fixed through a connecting hole. An installation hole is provided at one end of the positioning rod facing the tunnel section. The signal transmitter is installed in the installation hole. The signal receiver is installed on the tunnel section to connect with the signal of the signal transmitter. The drilling angle of the pipe roof is positioned according to the direction of signal transmission between the signal transmitter and the signal receiver.

[0011] Preferably, a shock-absorbing sleeve is provided in the connecting hole, and the shock-absorbing sleeve is sleeved on the outer surface of the positioning rod.

[0012] Preferably, the horizontal frame is a telescopic rod, a connecting groove is provided on the side of the support member, and one end of the telescopic rod away from the connecting hole is detachably connected to the connecting groove.

[0013] Preferably, a connecting cylinder is provided at the end of the telescopic rod, and the end of the connecting cylinder away from the telescopic rod is coaxially rotatably connected to the operating cylinder, and the end of the operating cylinder away from the connecting cylinder is coaxially rotatably connected to the connecting tube, and the end of the operating cylinder away from the connecting cylinder is fixedly connected to a stud extending out of the connecting tube, and a screw hole threadedly connected to the stud is provided in the connecting groove.

[0014] Preferably, the outer cover of the signal transmitter is provided with a transparent dust cover, and the dust cover is detachably connected to one end of the positioning rod where the signal transmitter is mounted.

[0015] Preferably, the pipe rack comprises a drill bit and a plurality of pipe rack pipes that can be connected in sequence through splines, a steel cage is provided inside the pipe rack pipe, and an outer surface of the pipe rack pipe is provided with an external thread.

[0016] Preferably, the angle adjustment assembly includes a support frame, a second driving member and a driving rod, the bottom of the support frame and the bottom of the second driving member are fixedly arranged on the top of the main telescopic rod, one end of the driving rod is eccentrically hinged to the output end of the second driving member, and the other end of the driving rod is fixedly connected to the bottom of the adjustment frame, and the bottom of the adjustment frame is hinged to the support frame through a cross rod.

[0017] In addition, the present invention also provides a construction method based on a tunnel section pipe roof drilling construction device, comprising:

[0018] Step 1: Set up a pipe shed arch at the tunnel face, and install several grids on the pipe shed arch. Prefabricate a guide tube coaxial with the drilling angle in each grid, and install a signal receiver in the guide tube;

[0019] Step 2: Connect the pipe rack to the support member and connect it to the first driving member; install the positioning rod with a signal transmitter installed at one end into the connection hole at the free end of the cross frame, and turn on the signal transmitter;

[0020] Step 3: Move the mobile platform to the longitudinal position where the positioning rod reaches the signal receiver, adjust the telescopic length of the main telescopic rod so that the positioning rod reaches the height of the signal receiver; synchronously adjust the angle of the pipe rack and the positioning rod by extending and retracting the angle adjustment assembly and the main telescopic rod; stop the angle adjustment assembly when the signal emitted by the signal transmitter is received by the signal receiver. At this time, the angle of the positioning rod is the drilling angle of the pipe rack;

[0021] Step 4: Move the mobile platform horizontally until the pipe rack and the guide pipe are coaxial;

[0022] Step 5: Start the first driving member, which drives the pipe rack to pass through the guide pipe along the set angle and then drill into the tunnel face.

[0023] As described above, the present invention also has at least the following beneficial effects:

[0024] By setting up a grid on the tunnel face, the strength of the tunnel section can be strengthened in the case of a soft face, and the support force when the pipe roof is drilled can be increased. The axial direction of the guide tube is coaxial with the pipe roof to be drilled. The signal receiver installed on the guide tube is used to receive the electrical signal sent by the signal transmitter. When the signal receiver and the signal transmitter are connected, the positioning rod is coaxial with the guide tube, that is, the drilling angle of the pipe roof is successfully positioned. At this time, the horizontal movement of the mobile platform can quickly align the pipe roof with the axial direction of the guide tube, thereby improving the accuracy of the pipe roof drilling angle. Through the cooperation of the angle adjustment component, the main telescopic rod and the angle positioning component, the drilling angle of the pipe roof can be adjusted from multiple angles and directions. The present invention is easy to operate and has a relatively simple and practical overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 It is a schematic diagram of the specific structure of the angle positioning component in the present invention.

[0027] Figure 3 It is a structural schematic diagram of the connecting cylinder, operating cylinder and connecting tube in the present invention.

[0028] Figure 4 It is a structural schematic diagram of the operating cylinder in the present invention.

[0029] Figure 5 It is a structural schematic diagram of the steel cage in the present invention.

[0030] Figure 6 Schematic diagram of the structure of the cross frame in the present invention.

[0031] Figure 7 It is a schematic diagram of the partial structure of the angle adjustment component in the present invention.

[0032] Figure 8 Schematic diagram of the connection structure between the second driving member and the driving rod in the present invention.

[0033] Figure 9 Schematic diagram of the distances between the pipe rack, positioning rods, guide tubes and signal receivers in the present invention.

[0034] Component number description

[0035] 1. Pipe scaffold; 2. First drive member; 3. Mobile platform; 4. Angle adjustment assembly; 5. Horizontal plate; 6. Main telescopic rod; 7. Drill bit; 9. Adjustment frame; 10. Second drive member; 11. Drive rod; 12. Support frame; 13. Connecting plate; 14. Square frame; 15. Driver; 16. Cross rod; 17. Straight rod; 18. Vertical plate; 19. Protrusion; 22. Straight track; 23. Output shaft; 24. Ball joint support; 25. Moving block; 26. Auxiliary support; 27. Linear slide; 29. ​​Cross frame; 30. Disc; 31. Cross hole; 32. Threaded steel bar; 33. Main support; 34. Horizontal frame; 35. Connecting hole; 36. Positioning rod; 37. Signal transmitter; 38. Dust cover; 40. Connecting groove; 41. Connecting cylinder; 42. Operating cylinder

[0036] 43. Connecting tube; 44. Stud; 45. Polished rod; 46. Annular sliding block. DETAILED DESCRIPTION

[0037] The following describes the implementation of the present invention through specific embodiments. People skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0038] See also Figures 1 to 9 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0039] The following embodiments are for illustration only and can be combined with each other, and are not limited to the contents presented in the following single embodiments.

[0040] See also Figure 1-8A tunnel section pipe roof drilling construction device includes a main telescopic rod 6, a mobile platform 3, an angle adjustment component 4, a pipe roof 1 and an angle positioning component. The bottom end of the main telescopic rod 6 is fixedly connected to the mobile platform 3, and the top end of the main telescopic rod 6 is connected to the angle adjustment component 4. The top of the angle adjustment component 4 is hinged with an adjustment frame 9, and the adjustment frame 9 is provided with a support for supporting the pipe roof 1 and a first driving member 2 for driving the pipe roof 1 to rotate and drill into the tunnel; the angle positioning component is detachably mounted on the support. The support members include auxiliary support members 26 and main support members 33. The adjustment frame 9 can be mounted on either the auxiliary support member 26 or the main support member 33, or the auxiliary support member 26 and the main support member 33 can be mounted on the adjustment frame 9 in sequence along the drilling direction of the pipe roof 1. In this case, the pipe roof 1 is supported on the adjustment frame 9 through the auxiliary support members 26 and the main support member 33, respectively. Preferably, the main telescopic rod 6 can be a telescopic cylinder or an electric telescopic rod. The telescopic cylinder does not produce leakage that can easily cause a fire during use, while the electric telescopic rod does not produce leakage. Therefore, using one of these two telescopic mechanisms in the tunnel can effectively avoid safety hazards. Preferably, the first drive member 2 is driven by a motor, and the output end of the motor is connected to the pipe roof 1 for driving the pipe roof 1 into the tunnel. The tunnel pipe roof drilling device also includes an operating platform. The operating platform (not shown) can be arranged on the mobile platform 3. The operating platform can be equipped with a controller and a display for controlling the operation of various electronic components. The controller and the electronic components are electrically connected, for example, to control the switch of the angle positioning assembly. The controller can be a conventional control device in the prior art, and its connection to each electronic component also adopts a conventional connection method in the art. The present invention does not improve the control system of the controller to control each electronic component, so the specific working principle and structure of the controller are not repeated here. When facing a tunnel section with different rock layers (such as the junction of soft and hard rock layers or a mixed rock layer), it is necessary to drill the pipe roof 1 into the tunnel at the optimal drilling angle. In this case, it is necessary to cooperate with the angle positioning assembly and the angle adjustment assembly 4 to adjust the drilling angle of the positioning pipe roof 1 in advance before drilling into the tunnel. After the adjustment is completed, the pipe roof 1 can be moved to the drilling point of the tunnel section by the mobile platform for drilling construction. At the same time, the construction environment in the tunnel is complex. The process of drilling the pipe roof 1 into the tunnel will generate a large amount of smoke, dust, gas impurities, and external forces such as the drive of the first drive member and the resistance generated by the tunnel on the pipe roof 1 during drilling into the tunnel will also cause the pipe roof 1 to vibrate significantly. Therefore, in order to increase the service life of the angle positioning assembly, the angle positioning assembly is detachably connected to the main support member 33 and can be installed or removed as needed.

[0041] like Figure 1-2As shown, the side surfaces of the auxiliary support member 26 and the main support member 33 are respectively connected to a horizontally extending outward cross frame 34. The free ends of the two cross frames 34 are respectively provided with a connection hole 35. The line (or axis) connecting the centers of the two connection holes 35 is parallel to the axis of the pipe rack 1. The angle positioning assembly passes through the two connection holes 35 and is fixedly connected to the two connection holes 35 to be fixedly connected to the cross frame 34. The two connection holes 35 are used to ensure that the angle positioning assembly remains coaxial with the pipe rack 1. The cross frame is used to removably fix the angle positioning assembly to the horizontal side surface of the pipe rack 1.

[0042] like Figure 1-2 As shown, the angle positioning assembly includes a positioning rod 36, a signal transmitter 37, a signal receiver, and a transparent dust cover 38. The two ends of the positioning rod 36 pass through two connecting holes 35 respectively. The end of the positioning rod 36 facing the tunnel section is provided with a mounting hole. The signal transmitter 37 is installed in the mounting hole. The signal receiver is installed on the tunnel section to connect with the signal transmitter 37. The drilling angle of the pipe rack is determined according to the direction of signal transmission between the signal transmitter 37 and the signal receiver. The positioning rod 36 is parallel to the axis of the pipe rack 1. Therefore, once the positioning rod 36 is oriented, the drilling direction of the pipe rack 1 is determined. Subsequently, drilling can be carried out by simply moving the pipe rack 1 to the drilling location. The signal transmitter 37 is used to cooperate with the signal receiver. According to the principle of two points locating a straight line, the position of the signal receiver is first determined (that is, the pipe roof drilling point on the tunnel section, and the direction in which the signal receiver receives the signal is the direction of the pipe roof drilling at this location), and then the rotation of the positioning rod on which the signal transmitter 37 is installed is adjusted through the angle adjustment component. When the signal emitted by the signal transmitter 37 is received by the signal receiver, the positioning rod points to the set direction of the pipe roof 1 drilling.

[0043] Because pipe rack 1 experiences significant vibration during drilling, to reduce the number of times the angle positioning assembly must be removed from the two supports, a shock-absorbing sleeve (not shown) coaxial with connecting hole 35 is fixedly mounted on the inner wall of connecting hole 35. This sleeve is mounted on the outer surface of positioning rod 36. The shock-absorbing sleeve reduces the impact of vibration on signal transmitter 37 at the end of the positioning rod, preventing radial movement of the positioning rod and signal transmitter 37, thereby increasing the service life of signal transmitter 37 and the accuracy of angle positioning.

[0044] Preferably, the two cross frames 34 are telescopic rods, such as electric telescopic rods or rod-shaped structures that can be telescoped in the prior art. The sides of the auxiliary support member 26 and the main support member 33 are respectively provided with connecting grooves 40, and the ends of the two electric telescopic rods facing away from the connecting holes 35 are respectively detachably connected to the connecting grooves 40. For different tunnel face conditions, drilling holes with different spacings need to be set. Therefore, the spacing between the angle positioning assembly and the pipe roof 1 needs to be adjustable to accommodate a wider range of applications. At this time, by adopting an electric telescopic rod structure for the cross frame, the spacing between the angle positioning assembly and the pipe roof 1 can be adjusted by electrically controlling the extension and retraction. Specifically, as Figure 3-Figure 4 As shown, the electric telescopic rod is integrally provided with a connecting cylinder 41 at one end facing the connecting groove 40, and a coaxial operating cylinder 42 is rotatably provided at the free end of the connecting cylinder 41. The end of the operating cylinder 42 away from the connecting cylinder 41 is rotatably connected to the end of a coaxial connecting tube 43, and the end of the operating cylinder 42 away from the connecting cylinder 41 is also integrally provided with a light rod 45, which is located in the connecting tube 43 and rotatably connected thereto. The end of the light rod 45 away from the operating cylinder 42 extends out of the connecting tube 43 and is integrally provided with a stud 44, and a screw hole that cooperates with the stud is provided in the connecting groove 40. The radial dimensions of the polished rod 45 and the stud 44 are identical and smaller than those of the operating cylinder 42. An annular sliding block 46 with a wedge-shaped cross-section is provided on each end face of the operating cylinder 42. Wedge-shaped grooves slidably connected to the annular sliding blocks 46 are provided on the opposing end faces of the connecting cylinder 41 and the connecting tube 43. The operating cylinder 42 rotates within the wedge-shaped grooves to achieve rotational connection with the connecting cylinder 41 and the connecting tube 43. By rotating the operating cylinder 42, the stud 44 affixed to the operating cylinder 42 can be screwed into the screw hole in the connecting groove 40. The annular sliding blocks 46 on both end faces of the operating cylinder 42 enable the operating cylinder 42 to rotate with the connecting cylinder 41 and the connecting tube 43 without axially disengaging. This achieves a detachable connection between the electric telescopic rod and the two supporting members. As an alternative to the above-mentioned detachable connection structure between the electric telescopic rod and the connecting groove 40, a plurality of elastic protrusions can be provided circumferentially on one end of the electric telescopic rod facing the connecting groove 40. When the electric telescopic rod is inserted into the connecting groove 40, the elastic protrusions are pressed by the inner wall of the connecting groove 40 so that the end of the electric telescopic rod comes into frictional contact with the connecting groove 40, thereby retaining the electric telescopic rod in the connecting groove 40. The elastic protrusions can also prevent the electric telescopic rod from moving circumferentially or radially relative to the connecting groove 40, thereby ensuring effective installation.

[0045] Preferably, the dust cover 38 is provided on the outer surface of the signal transmitter 37 and is detachably connected to the end of the positioning rod 36. A large amount of dust is generated during the drilling process of the pipe rack 1, and the signal transmitter 37 is a precision instrument. Therefore, by providing a transparent dust cover 38 on the outer cover of the signal transmitter 37, dust is prevented from damaging the use of the signal transmitter 37 while not affecting the signal transmitter 37 from sending outward signals. Specifically, the end of the positioning rod 36 is provided with a plurality of rubber protrusions (not shown in the figure) extending radially outward from the positioning rod 36. The rubber protrusions are distributed in a ring shape around the axial direction of the positioning rod. The dust cover 38 is conical in shape, and the large-diameter end of the dust cover 38 is provided with an annular clamping portion that bends inwardly toward the dust cover 38. When in use, the clamping portion of the dust cover 38 passes through the rubber protrusions to avoid being clamped with the rubber protrusions. The clamping portion of the dust cover 38 compresses the rubber protrusions when passing through the rubber protrusions. When the clamping portion passes through the rubber protrusions, the rubber protrusions are reset and abut against the inner wall surface of the dust cover 38 for fixation. Through the clamping connection between the rubber protrusions and the clamping portion, the large diameter end of the dust cover 38 only needs to pass through the rubber protrusions to be clamped to the end of the positioning rod 36. The operation is convenient. When the signal transmitter needs to be replaced, it only needs to be pulled out from the end of the positioning rod 36.

[0046] Preferably, the positioning rod 36 is a hollow tube. One end of the signal transmitter 37 with a connection can pass directly through the mounting hole, through the interior of the positioning rod 36, and out from the rear end of the positioning rod 36 to be electrically connected to the controller. The hollow tube is provided mainly to protect the connection end of the signal transmitter 37. When the signal transmitter 37 and the signal receiver located on the side of the guide tube are connected, the angle adjustment of the pipe rack 1 is completed. However, at this time, the pipe rack 1 is not aligned with the center of the guide tube. The pipe rack 1 needs to be moved horizontally toward the center of the guide tube by a distance m, such as Figure 9 As shown, assuming that the distance from the axis of the guide tube to the center of the signal receiver is d, and the distance from the axis of the pipe rack 1 to the axis of the positioning rod 36 is L, the distance that the pipe rack 1 needs to move is m=Ld, so the mobile platform 3 needs to drive the pipe rack 1 to move horizontally toward the center of the guide tube for a distance of m.

[0047] like Figure 1 、 Figure 5-6As shown, the pipe rack 1 includes a drill bit 7 and multiple pipes. The pipes are hollow tubes with internal and external splines at each end, respectively. A reinforcing cage is provided within the pipes, and the outer surfaces of the pipes are provided with external threads. Specifically, the drill bit 7 is connected to the end of the pipe with the internal splines. The multiple pipes are fixedly connected in sequence via the internal and external splines. The pipes away from the drill bit 7 are connected to the first drive member 2 via the external splines. The external threads on the outer surfaces of the pipes are used to reduce the effort required to drill into the tunnel. Preferably, the support member is provided with internal threads that threadably connect to the pipes. The internal threads on the support member are provided to prevent damage to the external threads of the pipes. Through the threaded connection, the support member and the pipes form a nut-screw mechanism, thereby supporting the pipes without damaging the threads on the pipes. The pipes are provided with multiple grouting holes. The drill bit 7 adopts the disposable high-strength drill bit 7 with holes commonly used in the prior art for drilling tunnel pipe sheds. A connecting shaft (not shown in the figure) is fixed to one end of the drill bit 7 connected to the pipe shed pipe. An external spline is provided on the connecting shaft. The connecting shaft is connected to the internal spline at one end of the first pipe shed pipe through the external spline to achieve the purpose of transmission. The end of the last pipe shed pipe away from the drill bit 7 can be connected to the first drive member 2 for transmission. The first drive member 2 drives the pipe shed pipe and the drill bit 7 to rotate and drill into the tunnel. The spline connection between adjacent pipe shed pipes can effectively improve the connection efficiency. A plurality of grouting holes are provided on the pipe shed pipe. After the pipe shed pipe is drilled into the tunnel, slurry can be poured into the pipe shed pipe to make the connection between the pipe shed pipe and the tunnel more stable after being drilled into the tunnel. The above-mentioned steel cage is composed of a plurality of threaded steel bars 32 placed in the pipe shed pipe and coaxial with the pipe shed pipe, which are used to improve the rigidity and strength of the pipe shed. The length of the steel cage is equal to the distance between the opposite ends of the internal spline and the external spline on the pipe shed pipe; specifically, as Figure 5-6As shown, in this embodiment, the steel cage is composed of four steel bar threads 32, and the two ends of the four steel bar threads 32 are installed in the pipe-supporting pipe through two cross-shaped frames 29. The two opposite cross-shaped frames 29 are detachably connected to the inner wall surface of the pipe-supporting pipe along the radial direction of the pipe-supporting pipe. The surfaces of the two opposite cross-shaped frames 29 are fixed with a disc 30 with a radial size smaller than the inner diameter of the pipe-supporting pipe. The middle part of the cross-shaped frame 29 and the disc 30 is provided with a cross-shaped hole 31 that passes through the axial direction of the pipe-supporting pipe so that the middle part of the cross-shaped frame 29 and the disc 30 can pass through the slurry. The cross frame 29 is mainly used to place the ends of four threaded steel bars 32, and the disc 30 is mainly used to limit the ends of the four threaded steel bars 32 between the inner and outer splines of the pipe-roof pipe. When the four threaded steel bars 32 are inserted into the pipe-roof pipe and the two ends are respectively located in the four areas formed by each cross frame 29 and the pipe-roof pipe, each threaded steel bar 32 is respectively located between two adjacent holes on the cross hole 31. Therefore, the interiors of the two connected sections of the pipe-roof pipe are connected, which ensures the strength of the pipe-roof without affecting the subsequent grouting construction. In the existing pipe rack, the steel cage is inserted after the pipe rack is drilled. However, when the length of the pipe rack drilled into the tunnel is too long, the operation of inserting the steel cage is more troublesome, and an additional power mechanism needs to be set up to input the steel cage. In addition, the overly long steel cage is inconvenient to transport, and the shorter steel cage requires an additional connection structure, which is more complicated. In addition, when the four threaded steel bars 32 are placed in the pipe rack, the external threads on their surfaces will generate resistance to each other, which is inconvenient to operate. Therefore, the present invention avoids the problem of inconvenient operation when adding threaded steel bars 32 therein after the pipe rack is drilled by adding a steel cage in the pipe rack in advance.

[0048] like Figure 1 、 Figure 7-8As shown, the angle adjustment assembly 4 includes a support frame 12, a second driving member 10 and a driving rod 11. The bottom of the support frame 12 and the bottom of the second driving member 10 are fixedly arranged on the top of the main telescopic rod 6. One end of the driving rod 11 is eccentrically hinged to the output end of the second driving member 10, and the other end of the driving rod 11 is fixedly connected to the bottom of the adjustment frame 9. The bottom of the adjustment frame 9 is hinged to the support frame 12 through a cross rod 16. Preferably, the second drive member 10 is a motor. When the drilling angle of the pipe rack 1 needs to be adjusted, the second drive member 10 is activated, and the drive rod 11, driven by the second drive member, rotates eccentrically around the axis of the second drive member 10. At this time, the adjustment frame 9 fixed to the drive rod 11 also rotates eccentrically. Since the bottom of the adjustment frame 9 is hinged to the support frame 12 via a cross rod 16, the adjustment frame 9 rotates around the cross rod 16. At this time, the pipe rack 1 within the support member mounted on the adjustment frame 9 rotates synchronously with the adjustment frame 9, thereby achieving the purpose of adjusting the angle. The hinged structure of the adjustment frame 9 and the support frame 12, as well as the connection structure of the drive rod 11 and the second drive member 10, are relatively simple, easy to operate, and safer during construction in the tunnel. When the pipe rack 1 has longitudinal displacement during the rotation of the adjustment frame 9, longitudinal adjustment can be achieved by extending and retracting the main telescopic rod 6.

[0049] like Figure 1 、 Figure 7-8 As shown, the output shaft 23 of the second driving member 10 is arranged vertically upward, and a connecting plate 13 extending obliquely outward is fixed to the side of the output shaft 23, and the driving rod 11 is hinged on the connecting plate 13. Specifically, the bottom of the support frame 12 and the second driving member 10 are both fixed on a circular horizontal plate 5, and the bottom of the horizontal plate 5 is fixedly connected to the top surface of the main telescopic rod 6. Since the radial dimension of the output shaft of a general motor is relatively small, in order to better enable the bottom end of the driving rod 11 to be eccentrically hinged to the side of the output shaft 23, the present invention provides a connecting plate 13 extending obliquely outward on the side of the output shaft 23, and the bottom end of the driving rod 11 is connected to the top surface of the connecting plate 13 by a ball joint.

[0050] like Figure 8As shown, the connecting plate 13 extends radially and obliquely upward along the output shaft 23, making it easier to connect the drive rod 11 to the connecting plate 13. The connecting plate 13 is provided with a straight track 22, which runs along the extension direction of the connecting plate 13. The drive rod 11 is a telescopic rod; one end of the telescopic rod is slidably connected to the straight track 22, and the straight track 22 is also provided with a telescopic drive member for driving the end of the telescopic rod to slide within the straight track 22. The straight track 22 is preferably a chute with a wedge-shaped longitudinal cross-section. A wedge-shaped moving block 25 that matches its shape is slidably connected to the straight track 22, and the bottom end of the drive rod 11 is hinged to the top surface of the moving block 25. When the movable block 25 is located within the straight track 22 near one end of the second drive member 10, the adjustment frame 9 remains horizontal. When the drilling angle of the pipe roof 1 needs to be adjusted, the telescopic drive member is activated, driving the movable block 25 within the straight track 22 to a set distance away from the second drive member 10. At this time, since the top of the drive rod 11 is fixed to the bottom of the adjustment frame 9, the adjustment frame 9 also deflects when the drive rod 11 deflects. Subsequently, by activating the second drive member 10 to rotate the connecting plate 13, the adjustment frame 9 is rotated. When the signal transmitter 37 in the angle positioning assembly communicates with the signal receiver on the tunnel section, the drilling angle of the pipe roof 1 is adjusted. The second drive member 10 is then deactivated, and the drilling process of the pipe roof 1 resumes. The straight track 22 also serves to adjust the rotation amplitude of the drive rod 11, thereby expanding the drilling angle of the adjustment frame 9 and the pipe roof 1, providing a wider adjustment range.

[0051] like Figure 1 、 Figure 7As shown, the bottom of the adjusting frame 9 is provided with two integrally connected square frames 14 and a straight rod 17, the two square frames 14 are fixedly connected to the bottom of the adjusting frame 9 in parallel with each other, the straight rod 17 is fixedly connected to the middle part between the two square frames 14, and two opposite vertical plates 18 are provided on the straight rod 17. The cross rod 16 is cross-shaped as a whole and the four protruding ends are spheres. The spheres at two opposite ends of the cross rod 16 are respectively hinged in the through holes opened on the two vertical plates 18, and the edges of each through hole are smoothly transitioned; the support frame 12 is an inverted U-shaped frame, the bottom of the U-shaped frame is fixed to the horizontal plate 5 fixed at the top of the main telescopic rod 6, and two corresponding protrusions 19 are provided on the inner side of the top of the U-shaped frame. The spheres at the other two opposite ends of the cross rod 16 are respectively hinged in the through holes opened on the two protrusions 19, and the edges of the through holes are also smoothly transitioned. The ends of the crossbar 16 are hingedly connected to the vertical plates 18 and the protrusions 19, so that the adjustment frame 9 can move in a circular motion relative to the support frame 12, thereby adjusting the angle between the adjustment frame 9 and the pipe rack 1. Since the adjustment frame 9 needs to support the pipe rack 1 and the first drive member 2, and the first drive member 2 also needs to drive the drilling of the pipe rack 1, the overall size of the adjustment frame 9 is relatively large. At this time, when the overall size of the crossbar 16 is larger, the contact area of ​​the crossbar 16 with the adjustment frame 9 and the support frame 12 is larger, thereby making the connection more stable and capable of bearing a wider range of loads.

[0052] like Figure 1As shown, the top of the adjustment frame 9 is provided with a linear slide 27 extending axially along the pipe rack 1. The first drive member 2 is connected to a driver 15, which drives the first drive member 2 to slide along the linear slide 27. The output end of the first drive member 2 is connected to the pipe rack 1 via a spline transmission. Specifically, a movable block is also fixed to the bottom of the first drive member 2. This movable block is driven to slide on the linear slide 27 by the driver 15. The driver 15 can adopt an existing servo motor. The servo motor driving the movable block to slide along the linear slide 27 is a conventional structure in the art, and therefore its specific structure and connection relationship are not further described here. When the pipe roof 1 is drilled into the tunnel face, due to the uncertainty of the drilling depth, multiple sections of pipe roof pipes need to be connected in sequence to achieve the required length. When in use, a certain number of pipe roof pipes are connected first, and then the last pipe roof pipe away from the drill bit 7 is connected to the first driving member 2. At this time, the first driving member 2 is located at the end of the linear slide 27 away from the auxiliary telescopic rod, and then the driver 15 is turned on to drive the first driving member 2 to move forward along the linear slide 27 toward the drill bit 7. The first driving member 2 is turned on to drive the drill bit 7 and several pipe roof pipes to rotate to achieve the drilling of the pipe roof 1. When the first driving member 2 moves to the end of the linear slide 27, if the drilling depth of the pipe roof 1 does not meet the requirement, the driver 15 can be used to drive the first driving member 2 to return to the initial position, and then the end of the last pipe roof pipe drilled is spline-connected with the required number of pipe roof pipes in sequence, and the pipe roof pipe close to the first driving member 2 at this time is connected to the first driving member 2 through a spline transmission, and the drilling process of the pipe roof 1 driven by the first driving member 2 is repeated. The length of the pipe roof 1 can be extended by repeating the above steps.

[0053] The mobile platform 3 is provided with running wheels (not shown) at its base, which allow it to be moved to a desired location. Alternatively, the mobile platform 3 can be connected to a transport vehicle and transported to the desired location. The transport vehicle can be connected to the mobile platform 3 via a padlock or other structure. The specific connection structure is known in the art and will not be described in detail here. The movement of the mobile platform 3 allows the pipe rack 1 to be quickly transported to the desired tunnel face, facilitating its movement.

[0054] In another embodiment of the present invention, if a single pipe rack is relatively long, an auxiliary telescopic rod parallel to the main telescopic rod 6 can be installed on the mobile platform 3. The bottom of the auxiliary support member 26 is connected to the top of the auxiliary telescopic rod via a ball joint. The bottom of the main support member 33 is fixed to the adjustment frame 9. The main support member 33 and the auxiliary support member 26 are used to support the drilling of the pipe rack 1. In this case, the adjustment frame 9 does not need to be long. The auxiliary support member 26 is connected to the top of the auxiliary telescopic rod via a ball joint, allowing the pipe rack 1 to rotate in multiple directions around the ball joint as the adjustment frame 9 rotates. When the angle of the pipe rack 1 needs to be adjusted, one of the auxiliary telescopic rod or the main telescopic rod 6 can be adjusted to be flexible. The other can be fixed after being extended to the desired position. Then, the rotation of the second drive member 10 drives the drive rod 11 and the adjustment frame 9 to rotate simultaneously. Because the rotation point of the adjustment frame 9 is located at the cross rod 16 below it, the adjustment frame 9, driven by the drive rod 11, rotates and tilts at an angle. As a result, the pipe rack 1 placed on the adjustment frame 9 undergoes a certain circular motion, allowing the angle of the pipe rack 1 to be adjusted. One of the auxiliary telescopic rod or the main telescopic rod 6 can be extended and retracted at will while the other is in a fixed state, which can ensure that the pipe rack 1 will not interfere when the adjustment frame 9 rotates.

[0055] The present invention also provides a construction method based on the above-mentioned ultra-large cross-section tunnel pipe roof drilling device, which specifically includes the following steps:

[0056] Step 1: Build a pipe-roof arch at the tunnel face. Interlace steel plates are welded between the upper and lower frames of the pipe-roof arch to form several grids. A guide tube coaxial with the drilling angle is welded inside each grid. Perform preliminary grouting on the tunnel face of the pipe-roof arch and install the signal receiver on the guide tube. The specific installation method of the signal receiver can be: the signal receiver can be installed in the fixing bracket welded on the side of the guide tube. At this time, the distance d between the signal receiver and the axis of the guide tube can be set to be equal to the distance L between the axis of the pipe roof and the axis of the positioning rod. At this time, when the signal transmitter on the positioning rod is connected to the signal of the signal receiver, the pipe roof coincides with the axis of the guide tube; or an annular rubber ring with the same size as the inner wall of the guide tube is set on the periphery of the signal receiver. When in use, the signal receiver and the rubber ring are inserted into the guide tube so that the signal receiver is located at the axis of the guide tube. In this scheme, after the signal transmitter on the positioning rod is connected to the signal receiver, the pipe roof also needs to move the distance from the axis of the pipe roof to the axis of the positioning rod; or a connecting ring is fixedly sleeved on the outside of the signal receiver, and the end face of the connecting ring is axially fixed to the coaxial mounting ring. The inner ring of the mounting ring is used to be sleeved on the outer wall of the guide tube. When in use, the mounting ring is sleeved on the outer wall of the guide tube. The connecting ring is located outside the guide tube mouth, and the signal receiver in the connecting ring is aligned with the guide tube. Coaxial, the mounting ring can be removed from the guide tube when not in use for reuse. In this scheme, after the signal transmitter and the signal receiver are connected, the pipe roof also needs to move the distance between the pipe roof axis and the positioning rod axis. Specifically, the pipe roof arch is an arched frame arranged along the curvature of the tunnel face. Several staggered steel plates are pre-welded on the pipe roof arch to form several grids, and then guide tubes coaxial with the drilling angle are welded inside the grids. The axial direction of the guide tube is pre-designed to be the same as the drilling direction, so that after the pipe roof arch is installed, the guide tube can provide the drilling position and angle for the subsequent drilling of the pipe roof 1. Before drilling into the pipe roof pipe, a pipe roof arch with greater rigidity is erected on the tunnel face to form an annular protective layer with a certain pressure bearing capacity, thereby creating a safe support environment for tunnel construction. Several grids are welded on the pipe roof arch to further improve the strength of the pipe roof arch, and at the same time to provide support and installation positions for several guide tubes and signal receivers. After the guide pipe and the fixing frame are installed, they can be sprayed to make the pipe arch fit on the tunnel face, stabilizing the face and the surrounding rock nearby. After the spraying is completed, the signal receivers can be installed on the fixing frames.

[0057] Step 2: Add a steel cage consisting of four threaded steel bars 32 along the axial direction of the pipe-roof pipe to improve the strength of the pipe-roof pipe; specifically, first place one end of the pipe-roof pipe into a cross-shaped frame 29, then insert one end of the four threaded steel bars 32 into the pipe-roof pipe and make each end of the four threaded steel bars 32 be located in the four areas formed by the cross-shaped frame 29 and the inner wall of the pipe-roof pipe in turn and abut against the disc 30, then clamp another cross-shaped frame 29 into the other end of the pipe-roof pipe and make the other end of each threaded steel bar pass through the four areas formed by the cross-shaped frame 29 and the pipe-roof pipe and abut against another disc 30, and now the installation of the steel cage in the pipe-roof pipe is completed.

[0058] Step 3: Connect one end of the pipe rack 1 to the auxiliary support 26, and pass the other end of the pipe rack 1 through the main support 33 and connect it to the first driving member 2; install the positioning rod 36 with a signal transmitter 37 installed at one end into the connecting hole 35 at one end of the two cross frames 34, and connect the other ends of the two cross frames 34 into the connecting grooves 40 of the two supports, and turn on the signal transmitter 37.

[0059] Step 4: Move the mobile platform 3 to the longitudinal position where the signal transmitter 37 on the positioning rod 36 reaches the signal receiver, and adjust the telescopic length of the main telescopic rod 6 so that the positioning rod 36 reaches the height of the signal receiver; adjust the angle between the pipe roof 1 and the positioning rod 36 through the angle adjustment component 4, and stop adjusting the angle adjustment component 4 when the signal emitted by the signal transmitter 37 is received by the signal receiver. At this time, the angle of the positioning rod 36 is the drilling angle of the pipe roof 1.

[0060] Step 5: Move the mobile platform 3 horizontally until the pipe rack 1 and the guide pipe are coaxial. The distance m moved is calculated by the above formula m=Ld.

[0061] Step 6: Turn on the driver 15 and the first driver 2. The first driver 2 slides along the linear guide rail 27 to drive the pipe rack 1 to drill into the tunnel face at a set angle through the guide pipe. The first driver 2 stops when the tail of the first drilled pipe rack is about 0.5m away from the auxiliary support. At this time, the first driver 2 moves to the end of the linear guide rail 27 near the auxiliary support. The driver 15 drives the first driver 2 back to the initial position of the linear guide rail 27. Then, the required number of pipe rack pipes are connected between the first drilled end pipe rack pipe and the first driver 2 through splines. The driver 15 then drives the first driver 2 to drive the connected pipe rack 1 to continue drilling into the tunnel. Repeat the above steps until the last pipe rack pipe is drilled. After drilling is completed, the driver 15 drives the first driver 2 away from the last pipe rack pipe.

[0062] Step 7: Repeat steps 4 to 6 until all pipe racks 1 are drilled into the tunnel.

[0063] Step 8: After the pipe roof 1 is drilled, the tail of the pipe roof pipe exposed on the tunnel face is sealed with concrete. Each pipe roof pipe is also provided with multiple grouting holes, which are connected to the interior of the pipe roof pipe. A delivery pump is connected to one of the grouting holes at the tail end of the pipe roof pipe exposed on the tunnel face, and grout is injected into the hole. The slurry is dispersed through the grouting holes and penetrates into the surrounding loose surrounding rock mass, solidifying it to form a stabilization circle, accelerating the solidification of the slurry and achieving the effect of stopping water. When the injected slurry reaches 85% of the design strength, short-distance excavation and support are carried out on the tunnel face. Preferably, the injected slurry is preferably a cement-water glass dual-liquid slurry, which can improve the physical properties of the rock mass. After the slurry solidifies, a strong bearing capacity shed-type advance support is formed between the pipe roof 1 and the tunnel, which can effectively control rock subsidence and stop water, ensuring smooth construction of the excavation below.

[0064] Through the above-mentioned construction method, the present invention effectively solves the difficult problem that the drilling angle of the pipe roof cannot be adjusted in multiple directions according to the soil structure in the tunnel during the pipe roof drilling construction in the tunnel, effectively improves the construction quality of the pipe roof, and provides a better safety guarantee for subsequent construction; when constructing this method, the drilling angle can be adjusted according to the different rock layers in the tunnel through the angle adjustment component, the overall structure is relatively simple, the construction cost is low, and the implementation is relatively convenient.

[0065] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A tunnel section pipe roof drilling construction device, characterized by: It includes main telescopic rod, mobile platform, angle adjustment component, pipe rack and angle positioning component. The bottom end of the main telescopic rod is fixedly connected to the mobile platform, and the top end of the main telescopic rod is connected to the angle adjustment assembly. The top of the angle adjustment assembly is hingedly connected to an adjustment frame, which is provided with a support for supporting the pipe rack and a first driving member for driving the pipe rack to rotate and drill into the tunnel; the angle positioning assembly is detachably mounted on the support to position the drilling angle of the pipe rack; The angle adjustment assembly includes a support frame, a second driving member and a driving rod, the bottom of the support frame and the bottom of the second driving member are both fixedly arranged at the top of the main telescopic rod, one end of the driving rod is eccentrically hinged to the output end of the second driving member, and the other end of the driving rod is fixedly connected to the bottom of the adjustment frame, and the bottom of the adjustment frame is hinged to the support frame through a cross rod; The output shaft of the second driving member is arranged vertically upward, and a connecting plate extending obliquely outward is fixedly provided on the side of the output shaft, and the driving rod is hingedly connected to the connecting plate; a straight track is provided on the connecting plate, and the direction of the straight track is arranged along the extension direction of the connecting plate; The bottom of the adjustment frame is provided with two integrally connected square frames and a straight rod, the two square frames are fixedly connected to the bottom of the adjustment frame in parallel with each other, the straight rod is fixedly connected to the middle part between the two square frames, and two opposite vertical plates are provided on the straight rod. The cross rod is cross-shaped as a whole and the four protruding ends are respectively spheres. The spheres at the two opposite ends of the cross rod are respectively hinged in the through holes opened in the two vertical plates, and the edges of each through hole are smoothly transitioned.

2. A tunnel section pipe roof drilling construction device according to claim 1, characterized in that: The side of the support member is connected to a horizontal frame extending outward along the horizontal plane. The free end of the horizontal frame is provided with a connecting hole. The axial direction of the connecting hole is parallel to the axis of the pipe rack. The angle positioning assembly is fixed through the connecting hole to be fixed to the horizontal frame.

3. The tunnel section pipe roof drilling construction device according to claim 2, characterized in that: The angle positioning assembly includes a positioning rod, a signal transmitter and a signal receiver. The positioning rod is fixed through a connecting hole. An installation hole is provided at one end of the positioning rod facing the tunnel section. The signal transmitter is installed in the installation hole. The signal receiver is installed on the tunnel section to connect with the signal of the signal transmitter. The drilling angle of the pipe roof is positioned according to the direction of signal transmission between the signal transmitter and the signal receiver.

4. The tunnel section pipe roof drilling construction device according to claim 3, characterized in that: A shock-absorbing sleeve is provided in the connecting hole, and the shock-absorbing sleeve is sleeved on the outer surface of the positioning rod.

5. The tunnel section pipe roof drilling construction device according to claim 3, characterized in that: The horizontal frame is a telescopic rod, a connecting groove is provided on the side of the support member, and one end of the telescopic rod away from the connecting hole is detachably connected to the connecting groove.

6. The tunnel section pipe roof drilling construction device according to claim 5, characterized in that: The end of the telescopic rod is provided with a connecting cylinder, and the end of the connecting cylinder away from the telescopic rod is coaxially connected to the operating cylinder, and the end of the operating cylinder away from the connecting cylinder is coaxially connected to the connecting tube, and the end of the operating cylinder away from the connecting cylinder is fixedly connected to a stud extending out of the connecting tube, and a screw hole threadedly connected to the stud is provided in the connecting groove.

7. The tunnel section pipe roof drilling construction device according to claim 3, characterized in that: The outer cover of the signal transmitter is provided with a transparent dust cover, and the dust cover is detachably connected to one end of the positioning rod where the signal transmitter is mounted.

8. The tunnel section pipe roof drilling construction device according to claim 1, characterized in that: The pipe rack comprises a drill bit and a plurality of pipe rack pipes connected in sequence through splines. A steel cage is arranged inside the pipe rack pipe, and an external thread is arranged on the outer surface of the pipe rack pipe.

9. A construction method for a tunnel section pipe-roof drilling construction device according to claim 6, characterized in that: include: Step 1: Set up a pipe shed arch at the tunnel face, and install several grids on the pipe shed arch. Prefabricate a guide tube coaxial with the drilling angle in each grid, and install a signal receiver in the guide tube; Step 2: Connect the pipe rack to the support member and connect it to the first driving member; install the positioning rod with a signal transmitter installed at one end into the connection hole at the free end of the cross frame, and turn on the signal transmitter; Step 3: Move the mobile platform to the longitudinal position where the positioning rod reaches the signal receiver, and adjust the telescopic length of the main telescopic rod so that the positioning rod reaches the height of the signal receiver; The angles of the pipe rack and the positioning rod are adjusted synchronously by extending and retracting the angle adjustment assembly and the main telescopic rod. When the signal emitted by the signal transmitter is received by the signal receiver, the angle adjustment assembly is stopped. At this time, the angle of the positioning rod is the drilling angle of the pipe rack. Step 4: Move the mobile platform horizontally until the pipe rack and the guide pipe are coaxial; Step 5: Start the first driving member, which drives the pipe rack to pass through the guide pipe along the set angle and then drill into the tunnel face.

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