A large cross-section tunnel pipe shed construction equipment and construction method

Abstract

The application provides a large-section tunnel pipe shed construction equipment and a construction method, which comprises a drilling pipe shed, a first driving part, a moving platform, an angle adjusting assembly, a first telescopic part and a second telescopic part. One end of the drilling pipe shed is in transmission connection with the first driving part, and the other end of the drilling pipe shed is movably connected with a first supporting part. The first supporting part is in spherical hinge connection with the top end of the first telescopic part. The angle adjusting assembly is connected to the lower part of the first driving part and the end of the drilling pipe shed away from the first supporting part. The top end of the second telescopic part is connected with the angle adjusting assembly. The bottom ends of the first telescopic part and the second telescopic part are both connected with the moving platform. The drilling angle and height are adjusted through the expansion and contraction of the angle adjusting assembly and the telescopic parts, and the structure is simple and the operation is convenient.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of tunnel construction equipment, and particularly relates to a large-section tunnel pipe shed construction equipment and a construction method. BACKGROUND

[0002] With the rapid development of tunnel construction scale and speed, the increasing traffic flow urgently needs larger-span large-section tunnels. In the next few decades, it is not difficult to foresee that a large number of tunnels with distinct characteristics such as large section, long tunnel line and soft and broken will be built, that is, highway tunnels will enter the construction period of large-section tunnels. At the same time, in order to adapt to the demand of economic development and improve the transportation capacity, the scale of highway construction in the country is expanding. Among them, the highway tunnel has gradually evolved from the original two-lane to three-lane and four-lane, and the tunnel span and section size have also been increasing. Therefore, it is particularly urgent to strengthen the research on related problems of such tunnels. Therefore, it is crucial to choose the appropriate construction method and support scheme to maintain the stability of the surrounding rock.

[0003] In the process of tunnel face construction, in order to avoid accidents such as collapse during construction, drilling and modern geophysical prospecting are used to detect the geological conditions in front of the tunnel rock mass excavation face, and according to the detection results, a pipe shed structure for support is drilled along the tunnel face in advance, that is, pipe shed advanced support is carried out. The pipe shed structure drilled can support the roof and sidewall, laying a solid foundation for subsequent tunnel excavation.

[0004] For large-section pipe shed advanced support, the traditional construction process mainly drills a hole in the tunnel face by a drill bit and a drill rod, then removes the drill bit and drill rod, and puts the pipe shed into the hole for support of the tunnel face. However, the traditional pipe shed support process has certain limitations, and for loose and soft rock mass, the drilled hole is prone to collapse and other problems. Therefore, the existing pipe shed construction process directly connects the drill bit and the pipe shed by transmission, and the driving device drives the pipe shed and the drill bit to rotate and drill. However, the drill bit and the pipe shed in the existing pipe shed construction equipment are installed on the mobile equipment through the supporting mechanism, and the pipe shed is drilled into the tunnel face by moving the mobile equipment. The position of the drill bit and the pipe shed on the mobile equipment is relatively fixed, and the pipe shed can only be adjusted in the horizontal direction by moving the mobile equipment, and cannot be drilled at multiple angles and in multiple directions according to the soil structure in the tunnel. SUMMARY

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide a large-section tunnel pipe shed construction equipment and a construction method, which solves the technical problem that the pipe shed cannot be drilled at multiple angles and in multiple directions in the existing pipe shed construction process.

[0006] To achieve the above object and other related objects, the present application provides a large-section tunnel pipe roof construction equipment, which comprises a drilling pipe roof, a first driving member, a moving platform, an angle adjusting assembly, a first telescopic member and a second telescopic member.

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

[0008] 1. By connecting one end of the drilling pipe roof with the first telescopic member through the first support member, and connecting the other end of the drilling pipe roof with the angle adjusting assembly, the ball hinge connection serves as a rotating fulcrum, and the drilling pipe roof is adjusted to rotate around the ball hinge connection through the angle adjusting assembly, while the telescopic members are extended and retracted, thereby realizing multi-angle and multi-direction drilling of the pipe roof construction.

[0009] 2. For a tunnel with a large section, the length of the drilling pipe roof required is also relatively long, and therefore the present application sets two telescopic members to support the drilling pipe roof, i.e., the drilling of the drilling pipe roof is supported through two fulcrums, thereby achieving better support effect.

[0010] 3. The present application has a relatively simple structure, and the drilling angle can be adjusted through only two telescopic members and an angle adjusting assembly, thereby being applicable to the large-section tunnel pipe roof support which has a greater demand for drilling position adjustment.

[0011] Preferably, the drilling pipe roof comprises a drill bit and a plurality of pipe roof pipes, the pipe roof pipe is a hollow pipe with an inner spline and an outer spline at both ends, the drill bit is connected to one end of the pipe roof pipe provided with the inner spline, the plurality of pipe roof pipes are connected in sequence through the splines, the pipe roof pipe away from the drill bit is connected to the first driving member through the outer spline, and a plurality of grouting holes are arranged on the pipe roof pipe; and an external drilling thread is arranged on the outer surface of the pipe roof pipe.

[0012] Preferably, the angle adjusting assembly comprises an adjusting frame, a support frame, a second driving member and a driving rod, the adjusting frame is connected to the lower part of the connection between the first driving member and the drilling pipe roof, the bottom of the support frame and the bottom of the second driving member are fixedly arranged on the top end of the second telescopic member, one end of the driving rod is eccentrically hinged to the output end of the second driving member, the other end of the driving rod is fixedly connected to the bottom of the adjusting frame, and the bottom of the adjusting frame is hinged to the support frame through a cross rod.

[0013] Preferably, the output shaft of the second driving member is vertically upwardly arranged, and an outwardly extending connecting plate is fixedly arranged on the side of the output shaft of the second driving member, and the driving rod is hingedly connected to the connecting plate.

[0014] Preferably, the extending direction of the connecting plate forms an angle less than 90 degrees with the axis of the output shaft, a straight rail is arranged on the connecting plate, the driving rod is a telescopic rod, one end of the telescopic rod is slidingly connected in the straight rail, and a telescopic driving member is further arranged in the straight rail and used for driving the end of the telescopic rod to slide in the straight rail.

[0015] Preferably, the bottom of the adjusting frame is provided with two square frames and a straight rod, the two square frames are fixedly connected to the bottom of the adjusting frame in parallel to each other, the straight rod is fixedly connected between the two square frames, two opposite vertical plates are arranged on the straight rod, and two opposite ends of the cross rod are respectively hingedly connected to the two vertical plates; the support frame is an inverted U-shaped frame, the bottom of the U-shaped frame is fixed to the top end of the second telescopic member, two opposite protrusions are arranged on the inner side of the top of the U-shaped frame, and the other two opposite ends of the cross rod are respectively hingedly connected to the two protrusions.

[0016] Preferably, the top of the adjusting frame is provided with a straight linear slide rail extending along the axis of the drilling pipe shed, the first driving member is connected with a driver, the driver drives the first driving member to slide along the straight linear slide rail, and the output end of the first driving member is in spline transmission connection with the drilling pipe shed.

[0017] Preferably, the first support member is a support ring with an inner thread arranged on the inner surface, the outer surface of the drilling pipe shed is provided with an outer thread matched with the inner thread, and the end of the drilling pipe shed away from the first support member is also connected to the top of the adjusting frame through a support ring.

[0018] Preferably, the bottom of the moving platform is provided with a universal wheel.

[0019] In addition, the application also provides a construction method based on the super-large-section tunnel pipe shed construction equipment, which comprises the following steps:

[0020] Step one: erecting a pipe shed arch on the tunnel face, arranging a plurality of grids on the pipe shed arch, arranging a guide pipe in each grid, and performing preliminary shotcrete treatment on the tunnel face of the pipe shed arch;

[0021] Step two: connecting one end of the drilling pipe shed to the first support member and transmission connecting the other end of the drilling pipe shed with the first driving member;

[0022] Step three: moving the moving platform to the vicinity of the tunnel face;

[0023] Step four: adjust the telescopic length of the first telescopic member, so that the drilling pipe shed reaches the guide pipe of the required drilling;

[0024] Step five: adjust the angle of the drilling pipe shed to the required drilling angle through the angle adjusting assembly and the telescopic adjustment of the second telescopic member;

[0025] Step six: start the driver and the first driving member, and the first driving member slides along the linear slide rail to drive the drilling pipe shed to drill into the tunnel face along the guide pipe at the set angle.

[0026] As described above, the present application has at least the following beneficial effects:

[0027] The grating is set on the tunnel face before the pipe shed drilling, and the guide pipe is arranged in the grating, which can set the position and angle of the drilling pipe shed drilling in advance, and the grating can enhance the support of the drilling pipe shed in the case of soft face, and the guide pipe can limit the drilling angle in advance, thereby improving the drilling efficiency; the drilling pipe shed and the first driving member are moved to the face by the moving platform, then the drilling pipe shed is lifted to the guide pipe by the first telescopic member, then the drilling angle of the drilling pipe shed is adjusted by the telescopic adjustment of the angle adjusting assembly and the second telescopic member, and finally the first driving member is slid on the linear slide rail to gradually drive the drilling pipe shed connected with the first driving member to drill into the tunnel. Through the cooperation of the angle adjusting assembly and the two telescopic members, the drilling pipe shed can be adjusted in multiple angles and multiple directions, which is simple to operate and has a simple overall structure. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0029] Figure 2 It is a schematic diagram of the structure of the pipe shed pipe in the present application.

[0030] Figure 3 It is a schematic diagram of the local structure of the angle adjusting assembly in the present application.

[0031] Figure 4 It is a schematic diagram of the connection structure of the second driving member and the driving rod in the present application.

[0032] Figure 5 It is a schematic diagram of the structure of the cross-shaped frame in the present application.

[0033] Figure 6 It is a schematic diagram of the structure when four threaded steel bars are installed between two cross-shaped frames in the present application.

[0034] Element number explanation

[0035] 1, drilling pipe shed; 2, first driving member; 3, moving platform; 4, angle adjusting assembly; 5, first telescopic member; 6, second telescopic member; 7, drill bit; 8, drilling thread; 9, adjusting frame; 10, second driving member; 11, driving rod; 12, support frame; 13, connecting plate; 14, square frame; 15, driver; 16, cross rod; 17, straight rod; 18, vertical plate;

[0036] 19, protrusion; 20, inner spline; 21, outer spline; 22, straight rail; 23, output shaft; 24, spherical hinge support; 25, sliding block; 26, support ring; 27, linear slide rail; 28, pipe shed pipe; 29, cross-shaped frame; 30, disc; 31, cross-shaped hole; 32, threaded steel bar. DETAILED DESCRIPTION

[0037] The embodiments of the present application will be described in detail by the following specific examples, and other advantages and effects of the present application can be easily understood by those skilled in the art from the contents disclosed in the specification.

[0038] Please refer to Figures 1 to 6 It should be understood that the structures, proportions, sizes, etc. shown in the drawings of the specification are only used to cooperate with the contents disclosed in the specification, to be understood and read by those skilled in the art, and do not have technical significance to limit the conditions that the present application can be implemented, so any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present application can produce and the purposes that the present application can achieve, should still fall within the scope of the technical content disclosed by the present application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the specification are only for the convenience of clear description, and are not used to limit the scope of the present application, and the change or adjustment of the relative relationship, without substantially changing the technical content, is also regarded as the scope of the present application.

[0039] The following examples are only for illustration. The various embodiments can be combined, which are not limited to the content shown in the following single embodiment.

[0040] Please refer to Figures 1-4The application provides a large-section tunnel pipe shed construction equipment, which comprises a drilling pipe shed 1, a first driving part 2, a moving platform 3, an angle adjusting assembly 4, a first telescopic part 5 and a second telescopic part 6. One end of the drilling pipe shed 1 is in transmission connection with the first driving part 2, and the other end of the drilling pipe shed 1 is movably connected with a first supporting part. The first supporting part is in spherical hinge connection with the top end of the first telescopic part 5. The lower part of the drilling pipe shed 1 is provided with an angle monitoring device (not shown in the figure). The angle adjusting assembly 4 is installed at the connection between the first driving part 2 and the drilling pipe shed 1 and is in communication connection with the angle monitoring device. The top end of the second telescopic part 6 is connected with the angle adjusting assembly 4. The bottom ends of the first telescopic part 5 and the second telescopic part 6 are fixedly connected with the moving platform 3. Preferably, the first telescopic part 5 and the second telescopic part 6 can adopt telescopic air cylinders or electric telescopic rods. The telescopic air cylinders will not cause leakage that is easy to cause fire during use, and the electric telescopic rods will not cause leakage. Therefore, the use of the two telescopic mechanisms in the tunnel can avoid safety hazards. The first driving part 2 can adopt a motor drive. The output end of the motor is in transmission connection with the drilling pipe shed 1, so that the drilling pipe shed 1 drills into the tunnel. The first supporting part is used for supporting the drilling pipe shed 1 when the drilling pipe shed 1 rotates to drill into the tunnel. The first supporting part is in spherical hinge connection with the top end of the first telescopic part 5, so that the drilling pipe shed 1 can rotate around the spherical hinge to the required angle under the adjustment of the angle adjusting assembly 4. The angle monitoring device is used for monitoring the angle of the drilling pipe shed 1 in real time. Preferably, the tunnel pipe shed drilling device further comprises a display screen and a controller (not shown in the figure). The angle monitoring device is preferably an angle sensor. The angle sensor communicates the monitored values to the controller and displays them on the display screen, so that the operator can more clearly know the drilling angle of the drilling pipe shed 1 and the change of the drilling angle in the adjustment process. The display screen, the controller and the angle sensor can all adopt the devices commonly used for monitoring angles in the prior art, and their connections also belong to the commonly used connection modes for monitoring angles in the field. The application does not improve the angle monitoring and display, so the specific working principles and structures of the display screen, the controller and the angle sensor will not be described here.

[0041] As Figures 1-2As shown, the drilling pipe shed 1 comprises a drill bit 7 and a plurality of pipe shed pipes 28, the pipe shed pipe 28 being a hollow pipe with an inner spline 20 and an outer spline 21 at both ends, the drill bit 7 being connected with the end of the pipe shed pipe 28 provided with the inner spline 20, the plurality of pipe shed pipes 28 being sequentially fixedly connected through the inner and outer splines, the pipe shed pipe 28 away from the drill bit 7 being drivingly connected with the first driving member 2 through the outer spline 21, and a plurality of grouting holes (not shown in the figure) being formed on the pipe shed pipe 28 in the shape of a plum blossom. The outer surface of the pipe shed pipe 28 is provided with a drilling thread 8. The end of the pipe shed pipe 28 away from the inner spline 20 is integrally provided with a connecting pipe with a radial dimension smaller than the maximum radial dimension of the pipe shed pipe 28, the outer spline 21 being arranged on the outer surface of the connecting pipe, the connecting pipe being hollow inside and being in communication with the pipe shed pipe 28, and the maximum radial dimension formed by the outer spline 21 also being smaller than the maximum radial dimension of the pipe shed pipe 28, so that no protruding part is generated when two adjacent pipe shed pipes 28 are connected. The drill bit 7 is a disposable high-strength hole drill bit 7 commonly used in tunnel pipe shed drilling in the prior art, the end of the drill bit 7 connected with the pipe shed pipe 28 being fixedly provided with a connecting shaft (not shown in the figure), the connecting shaft being provided with the outer spline 21, the connecting shaft being connected with the inner spline 20 at one end of the first pipe shed pipe 28 through the outer spline 21 to achieve the purpose of transmission, the inner spline 20 at one end of the second pipe shed pipe 28 being connected with the outer spline 21 at the end of the first pipe shed pipe 28 away from the drill bit 7, the plurality of pipe shed pipes 28 in the middle being sequentially spline-connected, the end of the last pipe shed pipe 28 away from the drill bit 7 being drivingly connected with the first driving member 2 to drive the pipe shed pipe 28 and the drill bit 7 to rotate and drill into the tunnel. The spline connection between the adjacent pipe shed pipes 28 can effectively improve the connection efficiency, the plurality of grouting holes being arranged on the pipe shed pipe 28, and the pipe shed pipe 28 being filled with slurry after being drilled into the tunnel to make the connection of the pipe shed pipe 28 with the tunnel more stable.

[0042] As Figure 1 , Figure 3As shown, the angle adjusting assembly 4 comprises an adjusting frame 9, a supporting frame 12, a second driving member 10 and a driving rod 11, the adjusting frame 9 is connected at the lower part of the connecting part between the first driving member 2 and the drilling pipe shed 1, the bottom of the supporting frame 12 and the bottom of the second driving member 10 are fixedly arranged at the top end of the second telescopic member 6, one end of the driving rod 11 is eccentrically hinged with the output end of the second driving member 10, the other end of the driving rod 11 is fixedly connected at the bottom of the adjusting frame 9, and the bottom of the adjusting frame 9 is hinged with the supporting frame 12 through a cross rod 16. Preferably, the second driving member 10 is an electric motor, when it is needed to adjust the drilling angle of the drilling pipe shed 1, the second driving member 10 is started to rotate, and then the adjusting frame 9 is driven to rotate around the hinged part between the adjusting frame 9 and the supporting frame 12 through the eccentrically hinged driving rod 11, and then the drilling pipe shed 1 connected with the adjusting frame 9 is driven to rotate around the spherical hinge connecting part between the first supporting member and the first telescopic member, so as to achieve the purpose of adjusting the angle, and the hinged structure between the adjusting frame 9 and the supporting frame 12 and the connecting structure between the driving rod 11 and the second driving member 10 are relatively simple and convenient to operate, and are relatively safe during the construction in the tunnel.

[0043] As shown in Figure 1 , Figures 3-4 , the output shaft 23 of the second driving member 10 is vertically arranged upward, the side surface of the output shaft 23 of the second driving member 10 is fixedly provided with a connecting plate 13 extending outwardly and obliquely, and the driving rod 11 is hinged on the connecting plate 13. Specifically, the bottom of the supporting frame 12 and the bottom of the second driving member 10 are fixedly arranged on a horizontal plate, and the bottom of the horizontal plate is fixedly connected at the top surface of the second telescopic member 6, since the radial dimension of the output shaft of the general electric motor is relatively small, in order to better eccentrically hinge the bottom end of the driving rod 11 at the side surface of the output shaft 23, the connecting plate 13 extending outwardly and obliquely is arranged at the side surface of the output shaft 23, the spherical hinge support 24 is arranged on the connecting plate 13, the bottom end of the driving rod 11 is fixedly connected with a rotating ball, and the rotating ball is hinged in the spherical hinge support 24, at this time, with the rotation of the output shaft 23 of the second driving member 10, the driving rod 11 will be driven to rotate in a circle by the spherical hinge support 24, and is limited by the supporting frame 12 to make the adjusting frame 9 fixedly connected with the top end of the driving rod 11 rotate in a circle around the cross rod 16, that is, the drilling pipe shed 1 can be driven to rotate around the first supporting member, and then the angle can be adjusted.

[0044] As shown in Figures 3-4As shown, the extension direction of the connecting plate 13 is less than 90 degrees with the axis of the output shaft 23, that is, the end of the connecting plate 13 away from the output shaft 23 is inclined upward, and the connecting plate 13 is provided with a straight rail 22, which is arranged along the extension direction of the connecting plate 13. The driving rod 11 is a telescopic rod. One end of the telescopic rod is slidingly connected in the straight rail 22, and the straight rail 22 is further provided with a telescopic driving member for driving the end of the telescopic rod to slide in the straight rail 22. Specifically, the straight rail 22 is a trapezoidal chute with a large bottom and a small top in longitudinal section, and a trapezoidal sliding block 25 matched with the shape of the straight rail 22 is slidingly connected in the straight rail 22. The top of the sliding block 25 extends out of the straight rail 22 and is fixedly connected with the spherical hinge support 24, and the opening of the spherical hinge support 24 is upward. The rotating ball at the bottom end of the telescopic rod extends into and is rotatably connected in the spherical hinge support 24. When the sliding block 25 is located close to the second driving member 10, the adjusting frame 9 is kept in a horizontal state. When it is necessary to adjust the drilling angle of the drilling pipe shed 1, the sliding block 25 is driven by the pushing and pulling action of the telescopic driving member to move in the straight rail 22 to a set distance away from the second driving member 10, that is, the position of the end of the telescopic rod on the connecting plate 13 is adjusted. At this time, since the top of the telescopic rod is fixed to the bottom of the adjusting frame 9, the adjusting frame 9 will be adjusted to a certain angle according to the movement of the telescopic rod. After the position of the telescopic rod on the connecting plate 13 is adjusted, the second driving member 10 is started to rotate and drive the connecting plate 13 to rotate, and the connecting plate 13 drives the telescopic rod to rotate around the cross rod 16 and the support frame 12 at the same time. At this time, the adjusting frame 9 fixed to the telescopic rod will produce a circular motion synchronized with the telescopic rod. When the value measured by the angle monitoring device reaches the required drilling angle, the second driving member 10 is closed, and the drilling process of the drilling pipe shed 1 is continued. The straight rail 22 is mainly used to adjust the amplitude of the rotation of the driving rod 11, thereby expanding the drilling angle of the adjusting frame 9 and the drilling pipe shed 1, and making the adjustment range more extensive.

[0045] As Figure 1 、 Figure 3As shown, the adjusting frame 9 is provided with two square frames 14 and a straight rod 17 which are integrally connected, 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, the straight rod 17 is provided with two opposite vertical plates 18, the cross rod 16 is in the shape of cross as a whole and the four protruding ends are spherical, the spherical bodies of the two opposite ends of the cross rod 16 are respectively hingedly connected to the through holes in the two vertical plates 18, the edges of the through holes are respectively smoothly transitioned; the supporting frame 12 is an inverted U-shaped frame, the bottom of the U-shaped frame is fixedly connected to the horizontal plate fixedly arranged at the top end of the second telescopic member 6, the top inner side of the U-shaped frame is provided with two corresponding protruding parts 19, the spherical bodies of the other two opposite ends of the cross rod 16 are respectively hingedly connected to the through holes in the two protruding parts 19, the edges of the through holes are also smoothly transitioned. Through the hingedly connection of the ends of the cross rod 16 with the vertical plates 18 and the protruding parts 19, the adjusting frame 9 can perform circumferential movement relative to the supporting frame 12, thereby realizing the adjustment of the angle between the adjusting frame 9 and the drilling pipe shed 1. The contact points of the cross rod 16 with the adjusting frame 9 and the supporting frame 12 are more, so the connection is more stable, and the range of load bearing is larger.

[0046] As Figure 1As shown, the top of the adjusting frame 9 is provided with a linear slide rail 27 extending along the axial direction of the drilling pipe shed 1, the first driving member 2 is connected with a driver 15, the driver 15 drives the first driving member 2 to slide along the linear slide rail 27, and the output end of the first driving member 2 is connected with the drilling pipe shed 1 through a spline transmission. Specifically, the bottom of the first driving member 2 is also fixedly provided with a sliding block, which is driven to slide on the linear slide rail 27 by the driver 15. The driver 15 can adopt an existing servo motor, and the servo motor driving the sliding block to slide along the linear slide rail 27 belongs to the conventional structure in the field, so the specific structure and connection relationship will not be described here. When the drilling pipe shed 1 drills into the tunnel face, since the drilling depth is uncertain, a plurality of pipe shed pipes 28 need to be connected in sequence to reach the required length. When in use, a certain number of pipe shed pipes 28 are connected first, then the last pipe shed pipe 28 far from the drill bit 7 is connected with the first driving member 2, at this time the first driving member 2 is located at the end of the linear slide rail 27 far from the first telescopic member 5, and then the driver 15 is started to drive the first driving member 2 to move towards the drill bit 7 along the linear slide rail 27, and the first driving member 2 is started to drive the drill bit 7 and the plurality of pipe shed pipes 28 to rotate, so as to realize the drilling of the drilling pipe shed 1. When the first driving member 2 moves to the end of the linear slide rail 27 close to the first telescopic member 5, if the length of the drilling pipe shed 1 does not reach the requirement, the driver 15 can be started to drive the first driving member 2 to return to the initial position, then a certain number of pipe shed pipes 28 are spline-connected in sequence at the end of the last pipe shed pipe 28 drilled into, one pipe shed pipe 28 close to the first driving member 2 at this time is spline-connected with the first driving member 2 through the spline transmission, and then the drilling process of the drilling pipe shed 1 driven by the first driving member 2 is repeated. The drilling depth of the drilling pipe shed 1 can be extended by repeating the above steps.

[0047] As shown in the figure, Figure 1 The first support member is a support ring 26 with an inner thread on the inner surface, and the outer surface of the drilling pipe shed 1 is provided with an outer thread matched with the inner thread. The end of the drilling pipe shed 1 far from the first support member is also connected to the top of the adjusting frame 9 through the support ring 26. The threaded connection between the support ring 26 and the outer surface of the drilling pipe shed 1 constitutes a lead screw nut structure. When the support ring 26 is relatively fixed, the drilling pipe shed 1 rotates while drilling into the tunnel, at this time the support ring 26 can support the drilling of the drilling pipe shed 1, and will not interfere with the rotation and advancement of the drilling pipe shed 1, thereby improving the supporting effect.

[0048] The bottom of the mobile platform 3 is provided with universal wheels (not shown in the figure), and the universal wheels can be selected as universal wheels with self-locking function. The universal wheels can make the mobile platform 3 move, and the side surface of the mobile platform 3 can be connected with a transport vehicle, and the mobile platform 3 can be transported to the corresponding position through the transport vehicle. The transport vehicle can be connected with the mobile platform 3 through a padlock and the like, and the specific connection structure belongs to the prior art, and will not be described here. Through the movement of the mobile platform 3, the drilling pipe shed 1 can be quickly transported to the tunnel face where the tunnel face is needed, and the movement is facilitated.

[0049] The application further provides a construction method of the super-large-section tunnel pipe shed construction equipment, which comprises the following steps:

[0050] Step one: a pipe shed arch is erected at the tunnel face, a plurality of grids are arranged on the pipe shed arch, a guide pipe is arranged in each grid, and the tunnel face of the pipe shed arch is subjected to preliminary shotcrete treatment; the pipe shed arch is arranged along the curvature of the tunnel face, a plurality of staggered plates are pre-welded on the arch to form a plurality of grids, and then the guide pipes are welded in the grids; the axial direction of the guide pipes is designed to be the same as the drilling direction, so that after the pipe shed arch is installed, the guide pipes can provide the drilling position and angle for the drilling of the drilling pipe shed 1; before the drilling pipe shed pipe is drilled, the pipe shed arch with large rigidity is erected at the tunnel face, so as to form a ring-shaped protective layer with certain pressure bearing capacity, thereby creating a safe supporting environment for tunnel construction; and the plurality of grids are welded on the pipe shed arch, so as to further improve the strength of the pipe shed arch and provide support and installation positions for the plurality of guide pipes.

[0051] Step two: one end of the drilling pipe shed 1 is connected in the first supporting piece, and the other end of the drilling pipe shed 1 is drivingly connected with the first driving piece 2; the first supporting piece is provided with an internal thread, and the outer surface of the drilling pipe shed 1 is provided with a drilling thread 8 matched with the internal thread, so that after the drilling pipe shed 1 passes through the first supporting piece, the continuous rotation of the drilling pipe shed 1 driven by the first driving piece 2 can make the drilling pipe shed 1 continuously drill into the tunnel face along the axial direction of the first supporting piece;

[0052] Step three: the mobile platform 3 is moved to the vicinity of the tunnel face;

[0053] Step four: the telescopic length of the first telescopic piece 5 is adjusted, so that the drilling pipe shed 1 reaches the required guide pipe;

[0054] Step five: adjust the drilling pipe shed 1 to be coaxial with the guide pipe through the angle adjustment assembly 4 and the telescopic adjustment of the second telescopic piece 6, and measure the drilling angle through the angle monitoring device; the first support piece is connected with the top end of the first telescopic piece 5 through a spherical hinge, so that one end of the drilling pipe shed 1 passing through the first support piece serves as a rotating fulcrum, and the other end of the drilling pipe shed 1 and the bottom of the first driving piece 2 are jointly installed on the angle adjustment assembly 4; the angle adjustment assembly 4 adjusts the rotation of the drilling pipe shed 1 around the rotating fulcrum, so that the drilling angle of the drilling pipe shed 1 reaching coaxial with the guide pipe can be adjusted;

[0055] Step six: a steel reinforcement cage (not shown in the figure) composed of four threaded steel bars 32 is additionally arranged in the pipe shed pipe 28 along the axial direction of the pipe shed pipe 28, for improving the rigidity and strength of the pipe shed; specifically, as shown in Figure 5 、 Figure 6 two opposite cross-shaped frames 29 are arranged on the inner wall surface of the pipe shed pipe 28 along the radial direction of the pipe shed pipe 28, one of the cross-shaped frames 29 is fixed between the inner spline 20 and the outer spline 21 in the pipe shed pipe 28 and close to the inner spline 20, and the other cross-shaped frame 29 is fixed between the inner spline 20 and the outer spline 21 in the pipe shed pipe 28 and close to the outer spline 21; the side surfaces of the two cross-shaped frames 29 away from each other are both fixedly provided with a disc 30 with a radial dimension smaller than the inner diameter of the pipe shed pipe 28; the middle parts of the cross-shaped frames 29 and the discs 30 are provided with cross-shaped holes 31 penetrating through along the axial direction of the pipe shed pipe 28, so that the middle parts of the cross-shaped frames 29 and the discs 30 can pass through the slurry; the cross-shaped frames 29 are mainly used for placing the end portions of the four threaded steel bars 32, and the discs 30 are mainly used for limiting the end portions of the four threaded steel bars 32 between the inner and outer splines of the pipe shed pipe 28; after the four threaded steel bars 32 are inserted into the pipe shed pipe 28, the end portions thereof pass through four regions formed by the cross-shaped frames 29 and the inner wall of the pipe shed pipe 28 and abut against the disc 30 close to the inner spline 20; at this time, each threaded steel bar 32 is located between two adjacent cross-shaped holes 31, and therefore the interiors of the two pipe shed pipes 28 connected together are in communication through the center of the inner spline 20, the cross-shaped hole 31 of one cross-shaped frame 29, the cross-shaped hole 31 of the other cross-shaped frame 29 and the center of the outer spline 21. The existing construction is to pass the steel reinforcement cage into the pipe shed after the pipe shed is drilled, however, when the length of the pipe shed drilled into the tunnel is too long, the operation of passing the steel reinforcement cage is more troublesome, a power mechanism needs to be additionally arranged to input the steel reinforcement cage, and the overlong steel reinforcement cage is inconvenient to transport, and a connecting structure needs to be additionally arranged for the shorter steel reinforcement cage, which is relatively complex, and the four threaded steel bars 32 are inconvenient to operate due to the resistance between the external threads on the surfaces thereof when being placed into the pipe shed; therefore, the present application can avoid the problem of inconvenient operation when the threaded steel bars 32 are additionally arranged in the pipe shed after the pipe shed is drilled by additionally arranging the steel reinforcement cage in the pipe shed pipe 28 in advance;

[0056] Step seven: the driver 15 and the first driving member 2 are started, the first driving member 2 slides along the linear slide rail 27 to drive the drilling pipe shed 1 to drill into the tunnel face at a set angle, and stops when the tail of the first drilled pipe shed pipe 28 is about 0.5 m away from the first support, at this time, the first driving member 2 is just moved to the end of the linear slide rail 27 close to the first support, the first driving member 2 is returned to the initial position of the linear slide rail 27 through the reverse driving of the driver 15, then a required number of pipe shed pipes 28 are connected between the tail of the first drilled pipe shed pipe 28 and the first driving member 2 through the spline connection, and the first driving member 2 drives the connected drilling pipe shed 1 to continue to drill into the tunnel through the driver 15. The above steps are repeated until the last pipe shed pipe 28 is drilled, and the first driving member 2 is driven away from the last pipe shed pipe 28 by the driver 15 after drilling is completed.

[0057] Step eight: after the drilling pipe shed 1 is drilled, the tail of the pipe shed pipe 28 exposed on the tunnel face is closed with concrete, a plurality of grouting holes are formed on each pipe shed pipe 28 and are in communication with the inside of the pipe shed pipe, a conveying pump is connected to one of the grouting holes at the tail of the pipe shed pipe 28 exposed on the tunnel face, and grout is injected into the grouting hole, the grout is dispersed into the surrounding loose rock mass through the grouting hole to solidify and form a stable circle, the solidification of the grout is accelerated, and the effect of water stopping is achieved; when the injected grout reaches 85% of the design strength, the tunnel face is excavated and supported in short footage. Preferably, the injected grout is preferably a cement-sodium silicate double-liquid grout, which can improve the physical properties of the rock mass; after the grout is solidified, the drilling pipe shed 1 and the tunnel can form a shed-type advanced support with strong bearing capacity, which can effectively control the subsidence of the rock mass and the water stopping function, and ensure the smooth construction of the lower excavation.

[0058] In summary, the present application effectively solves the problem that the drilling angle cannot be adjusted in multiple directions during the pipe shed drilling construction in the tunnel, and the grating and the guide pipe are arranged before the pipe shed drilling, which can effectively improve the construction efficiency of the pipe shed and provide better safety guarantee for subsequent construction. During the construction of the method, the drilling angle can be adjusted through the angle adjusting assembly according to different rock layers in the tunnel, the adjusting mechanism is relatively simple, the required construction cost is relatively low, and the implementation is relatively convenient.

[0059] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should be covered by the claims of the present application.

Claims

1. A super-large cross-section tunnel pipe roof construction equipment, characterized by: It includes a drilling pipe rack, a first driving member, a mobile platform, an angle adjustment component, a first telescopic member and a second telescopic member. One end of the drilling pipe shed is in transmission connection with the first driving member, and the other end of the drilling pipe shed is movably connected to the first supporting member, and the first supporting member is connected to the top end of the first telescopic member by a ball joint; The angle adjustment assembly is installed at the connection between the first driving member and the drilling pipe roof; The top end of the second telescopic member is connected to the angle adjustment assembly; The bottom ends of the first telescopic member and the second telescopic member are both connected to the mobile platform; The angle adjustment assembly includes an adjustment frame, a support frame, a second driving member and a driving rod, the adjustment frame is connected to the lower part of the connection between the first driving member and the drilling pipe rack, the bottom of the support frame and the bottom of the second driving member are both fixedly arranged on the top of the second telescopic member, 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 outward is fixedly provided on the side surface of the output shaft of the second driving member, and the driving rod is hinged on the connecting plate; The connecting plate extends in a direction such that the angle between the connecting plate and the axis of the output shaft is less than 90 degrees. A straight track is provided on the connecting plate. The driving rod is a telescopic rod, one end of which is slidably connected to the straight track. A telescopic driving member is further provided in the straight track for driving the end of the telescopic rod to slide within the straight track. The bottom of the adjusting frame is provided with two square frames and a straight rod, the two square frames are fixedly connected to the bottom of the adjusting frame in parallel with each other, the straight rod is fixedly connected between the two square frames, the straight rod is provided with two opposite vertical plates, and the two opposite ends of the cross rod are respectively hinged on the two vertical plates; the supporting frame is an inverted U-shaped frame, the bottom of the U-shaped frame is fixed to the top of the second telescopic member, and two corresponding protrusions are provided on the inner side of the top of the U-shaped frame, and the other two opposite ends of the cross rod are respectively hinged on the two protrusions.

2. The super-large cross-section tunnel pipe roof construction equipment according to claim 1, characterized in that: The drilling pipe rack includes a drill bit and multiple pipe rack pipes. The pipe rack pipes are hollow pipe fittings with internal splines and external splines at both ends respectively. The drill bit is connected to the end of the pipe rack pipe with the internal spline. Multiple pipe rack pipes are connected in sequence through splines. The pipe rack pipe away from the drill bit is transmission-connected to the first driving member through the external spline. Multiple grouting holes are provided on the pipe rack pipe; the outer surface of the pipe rack pipe is provided with a drilling thread.

3. The super-large cross-section tunnel pipe roof construction equipment according to claim 1, characterized in that: A linear slide rail extending axially along the drilling pipe shed is provided on the top of the adjusting frame. The first driving member is connected to a driver, which drives the first driving member to slide along the linear slide rail. The output end of the first driving member is connected to the drilling pipe shed through a spline transmission.

4. The super-large cross-section tunnel pipe roof construction equipment according to claim 3, characterized in that: The first support member is a support ring with an internal thread on its inner surface, the outer surface of the drilling pipe rack is provided with an external thread matching the internal thread, and the end of the drilling pipe rack away from the first support member is also connected to the top of the adjustment frame through the support ring.

5. The super-large cross-section tunnel pipe roof construction equipment according to claim 1, characterized in that: Universal wheels are provided at the bottom of the mobile platform.

6. A construction method for a super-large cross-section tunnel pipe-roof construction equipment according to claim 3, characterized in that: include: Step 1: Set up a pipe shed arch frame at the tunnel face, install several grids on the pipe shed arch frame, set guide pipes in each grid frame, and perform preliminary grouting treatment on the tunnel face of the pipe shed arch frame; Step 2: Connect one end of the drill pipe to the first support member, and connect the other end of the drill pipe to the first driving member; Step 3: Move the mobile platform to the vicinity of the tunnel face; Step 4: Adjust the telescopic length of the first telescopic member so that the drilling pipe shed reaches the guide pipe to be drilled; Step 5: Adjust the drilling pipe shed to the required drilling angle by telescoping the angle adjustment assembly and the second telescopic member; Step 6: Turn on the driver and the first driver, and the first driver slides along the linear slide rail to drive the drilling pipe shed to drill into the tunnel face through the guide tube along the set angle.

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