JP4226443B2 - Mobile drilling machine for tunnels and drilling method using the same - Google Patents

Description

  The present invention relates to a drilling machine for tunnels and a mobile drilling machine for tunnels using the same, and more particularly, installed inside a tunnel formed in a natural ground or ground, and from the inside to the outside in the section of the tunnel. The present invention relates to a drilling machine that drills holes with a hole drilling rod.

  In recent years, when reinforcing the peripheral ground of tunnels such as tunnels formed inside natural ground (outside the tunnel), a self-propelled carriage that can run on the bottom of the tunnel, and ascending and descending with respect to this self-propelled carriage The top of the mine is made up of a so-called jumbo digging heavy machine, which is composed of a jumbo body that is installed and a plurality of booms that are provided on the jumbo body and have drilling rods facing the face of the mine face and the top face. The excavation work of the end face and the like is performed, and the hardened material is pumped into the steel pipe of the drilling rod left on the top end face etc. of the mine shaft, and the improved body is formed on the rim of the mine shaft. There is a method to reinforce the outside of the tunnel.

  However, since the jumbo is a large heavy machine, it requires a wide working space, and this method cannot reinforce the peripheral ground of a small-diameter tunnel.

Also, in order to reinforce the peripheral ground of a small-diameter tunnel, generally, the peripheral ground of the tunnel is excavated using a drilling machine that is used in a ground advancement construction method such as the fore-piling method, and the remaining ground is removed. It is also conceivable to form an improved body at the periphery of the mine shaft by pumping the hardened material into the steel pipe of the hole rod (for example, see Patent Document 1).
Japanese Patent No. 3101550 (page 9, FIG. 1)

  However, in the above drilling machine, since the drifter body equipped with the drilling rod is attached to the tip of the boom, the drifter body is likely to be shaken by the reaction force from the ground, and can be constructed on soft ground etc. However, in hard rock ground, the drift of the drifter body becomes large, and drilling work is not efficient. On the hard rock ground, a heavy jumbo is advantageous in drilling work, but as described above, it cannot be used in a small-diameter tunnel with no work space.

  In addition, for the purpose of forming a main tunnel such as a large-diameter main tunnel, an advanced guide pit is formed by a shield machine in the approximate center of the planned cross section of the main mine tunnel, and the periphery of the planned cross section of the main tunnel is formed from within this advanced guide pit. Drill a hole radially toward the ground, inject a hardening material into the drilled hole, reinforce the peripheral ground of the planned cross section of the main tunnel, and the outer periphery of the peripheral ground of the planned cross section of the main tunnel and the advanced guide shaft There is a construction method in which a main tunnel such as a large-diameter main tunnel is formed by excavating the ground between the two and further dismantling the advanced guide shaft. In this method, a segment is formed on the inner peripheral surface of the advanced guide shaft. And a plurality of pre-penders (a drilling rod is inserted into these segments and then a hardened material is inserted from them) on the circumference of the segment as viewed from the cross section of the advanced guide shaft In this state, drilling must be performed. A device capable of drilling in a substantially radial direction, substantially perpendicular to the shaft center of the shaft, is less than a drilling machine in which the boom is provided on the face side of the advanced shaft and the drifter body is attached to the tip of the boom. It is easy to insert the hole rod into the pre-pender and work efficiency is good.

  Then, the main subject of this invention is providing the drilling machine for tunnels which can perform a drilling operation | work first in a small diameter tunnel with a sufficient work space, and, secondly, even in hard rock ground It is to provide a drilling machine for tunnels with little drifting of the drifter body and good working efficiency. Third, a segment on the inner peripheral surface and a plurality of pre-penders on the circumference of the segment as seen from the cross section of the tunnel An object of the present invention is to provide a drilling machine for a mine shaft that is excellent in workability in an attached state.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
The invention according to claim 1 is a support member erected below the inside of a mine shaft formed in a natural ground or ground ,
A traveling rail disposed on the support member and extending in the longitudinal direction of the mine shaft;
A drilling machine for tunnels that drills with a drilling rod from the inside to the outside in the cross section of the tunnel while traveling on the traveling rail ,
The borehole drilling machine includes a gantry, a bearing portion supported by the gantry, a guide cell having a shaft pivotally supported by the bearing portion , and attached to the guide cell so as to be vertically movable. A drift holder body, a rod holder that is attached to one of the longitudinal ends of the guide cell so as to be vertically movable in the drilling direction, and a lift that moves the rod holder up and down in the drilling direction. and use a hydraulic cylinder, equipped with a,
By rotating the guide cell, from the pit wall of the mine shaft, 360 degrees centered on the axis, and substantially radially drilled perpendicularly to the shaft center of the mine shaft,
This is a mobile drilling machine for tunnels.

(Function and effect)
By rotating the guide cell, it is configured to drill holes radially from the pit wall of the mine shaft, centered on the axis and substantially perpendicular to the shaft center of the mine shaft. Since the hole can be drilled almost radially to the outside of the tunnel with the axis of the drilling machine as the center, an improved body can be created by injecting a hardener using the drilled hole. Thereby, the peripheral ground of the mine shaft can be reinforced. Unlike the fore-piling method, such as the fore-piling method, which drills holes at the top of the face with an acute angle with respect to the shaft axis of the mine shaft, it is substantially radial and substantially perpendicular to the shaft axis of the mine shaft. By drilling a hole, it is easy to form a long hole outside the tunnel, and if a hardening material is injected using this hole, an improved body of a large circle (large diameter) is formed outside the tunnel. Can be easily done.

  In the description of the present invention, the term “mineway” includes the meaning of an advanced guiding mine prior to the construction of a natural mountain, a passage dug underground, a hillside or a road passing through the ground, a tunnel, a tunnel, and the main tunnel.

<Invention of Claim 2>
According to a second aspect of the invention, the rod holder definitive to guide cells of the tunnels in a drilling machine to the tip portion of the opposite side, telescopic to abut pressed against the pit wall on the opposite side of the tunnel and drilling direction The guide cell fixing member is provided, and when drilling, the guide cell fixing member takes a fulcrum on the wall surface of the well, and the guide cell is fixed by the guide cell fixing member and the shaft. Furthermore, it is a mobile drilling machine for tunnels according to claim 1.

(Function and effect)
The guide cell is provided with an extendable guide cell fixing member that abuts against and presses against the pit wall of the tunnel, and the guide cell is fixed by the guide cell fixing member and the shaft when drilling. Therefore, there is little blurring of the drifter body in soft rock ground as well as hard rock ground. That is, even in a conventional small drilling machine, the drifter body equipped with the drilling rod is attached to the tip of the boom, so it supports only the fulcrum of the boom. However, the drilling machine according to the present invention is restrained at two points: the shaft for rotating the guide cell and the well wall pressed by the guide cell fixing member. Can reduce blurring. Therefore, although it is a small drilling machine, the range of ground for drilling is wide. In addition, even if a large-diameter rod is used compared to a conventional small-sized drilling machine, the drifter body is less likely to be shaken, so that the workability is excellent.

<Invention of Claim 3>
According to a third aspect of the present invention, the bearing portion of the tunnel drilling machine has a telescopic bearing portion fixing member that comes into contact with and presses the upper wall of the tunnel, and the bearing portion is viewed from the tunnel cross section. vertex and two provided so as to be substantially V-shape as is at the time of drilling, the configuration the bearing portion by the bearing portion fixing member is fixed Rutotomoni,
The travel rail has a substantially H-shaped flange portion as a travel surface,
The gantry drilling machine frame is attached to the base frame,
The base frame supports a roller portion that can move on the traveling rail, a clamp portion that can be locked to a lower portion of the flange portion, and can fix the drilling machine on the rail, and the traveling rail. And a telescopic jack portion that presses on a support member previously arranged in a sleeper shape,
When drilling, the clamp part is locked to the lower part of the flange part of the running surface, and the jack part presses the support member, so that the mobile drilling machine for tunnels is used as a running rail. It was designed to be fixed on the top ,
It is a mobile drilling machine for tunnels of Claim 1 or 2.

(Function and effect)
The bearing portion of the borehole drilling machine is provided with a telescopic bearing fixing member that abuts and presses above the pit wall of the tunnel, and the bearing portion is fixed by the bearing fixing member when drilling. Since the shaft that supports the guide cell is also fixed and restrained, the drift of the drifter body can be reduced, the range of ground for drilling can be expanded, and construction can be performed. Efficiency is improved. In particular, since two bearing portion fixing members are provided in the bearing portion so as to be substantially V-shaped with the bearing portion as a vertex when viewed from the cross section of the mine shaft, the two left and right sides are substantially V-shaped from above. By fixing at a point, the drilling machine main body is prevented from overturning during drilling.
In addition, the in-tunnel mobile drilling machine of the present invention includes a roller section that can move on a traveling rail having a substantially H-shaped flange section preliminarily laid inside the tunnel. Therefore, the movement in the longitudinal direction of the tunnel is easy. In particular, when drilling, the clamp part is locked to the lower part of the flange part of the running surface, and the jack part presses the support member, so that the mobile drilling machine for tunnels is used for running. Since it is configured to be fixed on the rail, the drift of the drifter main body is further reduced, and the fixing of the drilling machine main body during drilling and the prevention of falling are further strengthened.

<Invention of Claim 4>
Invention of Claim 4 is provided with the jack which can press the said supporting member by extending | stretching the said hole drilling machine for tunnels in the state located on the said supporting member, Any one of Claim 1 thru | or 3 2. A mobile drilling machine for tunnels according to claim 1 .

<Invention of Claim 5>
According to the fifth aspect of the present invention, the inside of the mine shaft includes a substantially arc-shaped segment that is connected to the entire inner circumference of the mine shaft to form a lining body and constitutes the mine wall, and a cross section of the mine shaft. A plurality of pre-penders attached at predetermined intervals on the circumference of the segment as seen, and in the state of drilling, the drilling rod is inserted into the pre-pender when drilling. It is a mobile drilling machine for tunnels of any one of Claims 1 thru | or 4 made the structure to do.

(Function and effect)
Since the present invention is a drilling machine capable of drilling in a substantially radial manner substantially perpendicular to the axis of the advanced guide shaft, the boom is provided on the face side of the advanced guide shaft, and the drifter body is attached to the tip of the boom. The drilling rod is easier to insert into the pre-pender than the drilling machine, and the work efficiency is better in the case of drilling with the drill rod inserted in the pre-pender.

<Invention of Claim 6>
According to a sixth aspect of the present invention, the drilling machine for a mine shaft includes a base frame and a lateral movement frame mounted on the base frame so as to be laterally movable in a direction perpendicular to the traveling rail. Provided below the gantry,
A front portion of the gantry is pivotally supported by a shaft support piece attached to the lateral movement frame by a pin extending in a lateral direction, and a rear portion of the gantry is supported by a rear portion of the lateral movement frame. It is connected to the attached hydraulic cylinder for the extendable base,
By the expansion and contraction of the gantry hydraulic cylinder, the gantry rotates with the pin as a fulcrum, and the guide cells are inclined forward or backward in conjunction with the rotation, and the drifter body and the drilling rod are tunnels. With respect to the longitudinal direction of the mine shaft relative to the front or rear,
By the lateral movement of the lateral movement frame, the guide cell is configured to be laterally movable in a direction perpendicular to the traveling rail.
It is a mobile drilling machine for tunnels of Claim 6 .

(Function and effect)
The lateral movement of the lateral movement frame allows the guide cell to move laterally in a direction that is relatively perpendicular to the traveling rail, so that the shaft center of the mine shaft is projected onto the central axis of the rail. Even if it is not, the position of the guide cell and drifter body is adjusted by the lateral movement of the lateral movement frame, and the drilling position is the same as the state where the shaft center of the tunnel is projected on the central axis between the rails. can do. Further, when drilling, it is possible to cope with the case where it is desired to form a radial hole by decentering from the shaft center of the tunnel.

<Invention of Claim 7>
According to a seventh aspect of the present invention, the drilling machine for a mine shaft includes a pinion attached to a shaft of the guide cell, two racks that engage with the pinion from the left and right, and are movable up and down, and these racks. It is equipped with a telescopic hydraulic cylinder for racks attached to each upper part in a posture along the vertical direction,
By extending one of the rack hydraulic cylinders and retracting the other, the rack moves up and down in conjunction with each other, whereby the pinion rotates clockwise or counterclockwise. The guide cell is configured to rotate through a shaft.
It is a mobile drilling machine for tunnels of any one of Claims 1 thru | or 6 .

<Invention of Claim 8>
In the invention according to claim 8 , a support member is constructed below the inside of the tunnel formed in the ground or the ground,
On this support member, a traveling rail extending in the longitudinal direction of the mine shaft is disposed,
Installing a drilling machine for tunnels on the rail for traveling,
A drilling method for drilling with a drilling rod from the inside to the outside of the tunnel cross-section while moving the drilling machine for tunnels on the traveling rail,
As the drilling machine for tunnels, a gantry, a bearing portion supported by the gantry, a guide cell having a shaft pivotally supported by the bearing portion, and attached to the guide cell so as to be vertically movable A drift holder body, a rod holder that is attached to one of the longitudinal ends of the guide cell so as to be vertically movable in the drilling direction, and a lift that moves the rod holder up and down in the drilling direction. Using a borehole drilling machine equipped with a hydraulic cylinder for
During the drilling, the guide cell is rotated, so that the drilling is performed from the pit wall of the mine shaft 360 degrees around the axis and substantially perpendicular to the shaft center of the mine shaft, approximately radially.
This is a drilling method using a tunnel-type mobile drilling machine .

  According to the present invention, in a tunnel drilling machine for a mine shaft and a mobile drilling machine for a mine shaft using the same, firstly, a drilling operation can be performed in a small-diameter tunnel having no work space, In addition, even in hard rock ground, there is little drifting of the drifter body, etc., and work efficiency is good. Third, with a segment on the inner peripheral surface and a plurality of pre-penders attached on the circumference of the segment as seen from the cross section of the tunnel, Advantages such as excellent workability are brought about.

Embodiments of the present invention will be described below.
<Drilling machine for tunnels and mobile drilling machine for tunnels>
The mine drilling machine according to the present invention will be described in detail mainly with reference to FIGS. 1 is a front view of a mobile drilling machine for tunnels installed in a segment attached to the tunnel, FIG. 2 is a side view of the mobile drilling machine for tunnels in FIG. FIG. 4 is a rear view of the in-tunnel mobile drilling machine, FIG. 5 is an enlarged front view centering on the inside of the gear box of the in-tunnel mobile drilling machine, FIG. FIG. 3 is a partially enlarged side view for explaining a guide cell, a rod holder, and a lifting hydraulic cylinder.

  First, the basic configuration of the tunnel drill 1 for tunnels will be described. A pit drilling machine 1 includes a guide cell 2, a drifter body 3 attached to the guide cell 2 so as to be vertically movable, a shaft 4 that pivotally supports the guide cell 2, and a shaft 4 Receiving bearing portion 5. A plurality of connectable drilling rods 6, 6,... Are connected to the drifter body 3, and the drilling holes for drilling the ground are formed at the tips of the drilling rods 6, 6,. A bit (not shown) is attached. An excavation cylinder 30 is attached to the rear of the drifter body 3, and the drifter body 3 is advanced by the excavation cylinder 30.

  A rod holder 12 that holds the drilling rods 6, 6,... Is attached to one end of the guide cell 2 in the longitudinal direction, and a rod is disposed below the rod holder 12 and behind the guide cell 2. A lifting hydraulic cylinder 14 for moving the holder 12 up and down in the drilling direction is attached. The elevating hydraulic cylinder 14 moves the rod holder 12 up and down. This also rotates the rod holder 12 over 360 degrees about the shaft 4, so that the traveling rail 50 and the support member 51 are described later. In order to prevent the rod holder 12 from colliding with the rod holder 12, the length is adjusted by moving it up and down. The bearing portion 5 includes a gear box 9, and a bearing body (not shown) is installed and fixed at a lower portion in the gear box 9. In the gear box 9, a gear mechanism is provided in front of the bearing body. The gear mechanism includes a pinion (not shown) attached to the shaft 4 and two racks 10 and 10 that mesh with the pinion from the left and right and can move up and down. The rack hydraulic cylinders 13 and 13 which are installed in the gear box 9 are attached to the upper portions of the racks 10 and 10, respectively. The rack hydraulic cylinders 13 and 13 are controlled to extend and contract (one side). The racks 10 and 10 are interlocked to move up and down as shown by the arrows in FIG. 5 so that the pinion rotates clockwise or counterclockwise as shown by the arrows in FIG. Each rotates about 200 degrees. By this rotation of the pinion, the shaft 4 can be rotated substantially 360 degrees, and the guide cell 2 and the drifter body 3 connected to the shaft 4 are also rotated 360 degrees around the shaft 4. As shown in FIG. 8, drilling work can be performed substantially radially over the entire circumference of the cross section of the tunnel as shown in FIG.

  A gantry 7 is attached to the lower part of the gear box 9 to support the load of the gear box 9 and the like, and the front of the gantry 7 (the guide cell 2 side) is the front of a lateral movement frame 8 described later. A telescopic mount hydraulic pressure that is pivotally supported by a pin 8f on a shaft support piece 8e attached to the (guide cell 2 side), and the rear of the base 7 is attached to the rear of the lateral movement frame 8. By being connected to the cylinder 7a, the gantry 7 can be rotated about the pin 8f as a fulcrum by the expansion and contraction of the gantry hydraulic cylinder 7a. By this rotation, as shown by the arrows in FIG. 6, the gantry 7, the gear box 9, the shaft 4, and the guide cell 2 are interlocked with each other in a range of about 5 degrees at the maximum (maximum total of about 10 degrees). The drift body 3 and the drilling rods 6, 6,... Can be tilted forward or backward in the longitudinal direction of the tunnel and the drilling operation can be performed in this state.

  Further, the borehole drilling machine 1 is provided with a hydraulic unit 15 behind the gantry 7, the gear box 9, and the like, and a hydraulic hose (not shown) is connected to the drifter body 3, the lifting hydraulic cylinder 14, The hydraulic cylinders 13 and 13 for racks, the hydraulic cylinders 7a for racks, the cylinders 19 for lateral movement, which will be described later, the cylinders 16b for fixing guide cells, the cylinders 30 for digging, etc. By operation, each cylinder expands and contracts. Reference numeral 15a denotes an activation panel for activating the hydraulic unit 15.

  Next, the detailed structure of the tunnel drill 1 for tunnels is demonstrated. A guide cell fixing member 16 is attached to the tip of the guide cell 2 on the side opposite to the rod holder 12 in the longitudinal direction. The guide cell fixing member 16 includes a tubular expansion / contraction leg 16a whose tip abuts against the wall surface of the well, and a guide cell fixing cylinder 16b having a piston fitted to the base of the expansion / contraction leg 16a. The telescopic legs 16a can be moved up and down by the expansion and contraction of the guide cell fixing cylinder 16b. Therefore, the guide cell fixing member 16 can be expanded and contracted as shown by the arrows in FIG. After extending the length of the guide cell fixing member 16 to a predetermined length, the fulcrum can be firmly fixed on the wall surface of the well.

  Further, two bearing portion fixing members 17 and 17 are attached to the side surface of the gear box 9 of the bearing portion 5 in a V shape with an angle of about 90 degrees when viewed from the cross section of the tunnel. These bearing portion fixing members 17 include a tubular telescopic leg 17a whose tip abuts against the pit wall surface, a base portion of the telescopic leg 17a, and a sheath tube 17b having a diameter larger than that of the telescopic leg 17a. . The telescopic leg 17a is slidable inside the hollow sheath tube 17b. Therefore, the bearing portion fixing member 17 is rotated by a lever attached to the base end side of the bearing portion fixing member 17, As shown by the arrow in FIG. After the length of the bearing portion fixing member 17 is adjusted to a predetermined length, the telescopic legs 17a can be fixed from the side surface of the sheath tube 17b by screwing or the like (not shown). Can take. In addition, the angle of the two bearing portion fixing members 17 and 17 is not necessarily 90 degrees, but prevention of overturning of the drilling machine 1 for tunnels during drilling and the mobile drilling machine 11 for tunnels described later is performed. Therefore, at least the shaft wall contact positions of the expansion and contraction legs 17a and 17a of the bearing fixing members 17 and 17 are the widths of the tunnel drilling machine 1 in the tunnel and the movable drilling machine 11 in the tunnel described later. It is preferable that it is located outside the both end positions in the direction.

  Next, the in-tunnel mobile drilling machine 11 will be described. As the drilling machine, the above-mentioned tunnel drilling machine for tunnel 1 is used. In addition to the in-tunnel drilling machine 1, the in-tunnel mobile drilling machine 11 includes a base frame 18 and a lateral movement frame 8. The base frame 18 frames left and right vertical frame members 18a and 18b made of grooved steel and the front and rear horizontal frame members 18c and 18d connecting both ends of the left and right vertical frame members 18a and 18b, and the left and right vertical frame members 18a and 18b. Are attached to the frame main body 18A obtained by connecting the intermediate members 18e, 18e,... That connect the middle except for both ends of the frame and the front and rear horizontal frame members 18c, 18d. Four rollers 18B, 18B, 18B, and 18B that can move on the parallel traveling rails 50 and 50 are mounted on the side surfaces of the front and rear lateral frame members 18c and 18d, respectively. Clamps 18D, 18D, 18D, 18D that can be locked to the lower part of the flange portion of the running surface of the rails 50, 50 and that can fix the movable drilling machine 11 for mine shafts on the rail, and left and right vertical frame members Two are attached to the side surfaces of 8a and 18b, respectively, are positioned on sleeper-like support members 51 and 51, which will be described later, and can extend and press the support members 51 and 51 as shown by the arrows in FIG. Jacks 18E, 18E, 18E, and 18E. The four-wheel rollers 18B, 18B, 18B, and 18B allow the base frame 18 to move on the traveling rails 50 and 50, so that the mine-type mobile drilling machine 11 moves on the traveling rails 50 and 50. It is movable. The clamps 18D, 18D, 18D, and 18D, as shown by the arrows in FIG. 4, rotate the lever to the left and right so that the locking limbs of the running rails 50 and 50 are moved by a substantially elliptical cam. A mode of locking to the lower portion of the flange portion and a mode of non-locking can be selected. The jacks 18E, 18E, 18E, and 18E are mainly for strengthening the fixing of the in-tunnel movable drilling machine 11 and preventing the fall, and the base portion of the leg portion of the jack 18E is threaded. These male screws are screwed into the female screw portions attached to the side surfaces of the left and right vertical frame members 18a and 18b, and the leg portions are moved up and down by the rotation of the male screws.

  Further, the lateral movement frame 8 is attached to an upper portion on the front side of the frame main body 18A and below the mount 7 described above. The lateral movement frame 8 is configured by framing left and right vertical frame members 8a and 8b made of groove steel or the like and front and rear horizontal frame members 8c and 8d that connect both ends of the left and right vertical frame members 8a and 8b. . Sliding plates 8g and 8g are attached to the lower surfaces of the front and rear lateral frame members 8c and 8d, respectively, and these sliding plates 8g and 8g have a cross-section of approximately L disposed in front of the frame body 18A. As shown by the arrows in FIG. 3, the lateral movement frame 8 can be laterally moved in the width direction of the frame main body 18A while being guided by the guide rails 18g and 18g having the shape of an angle. 2, the drifter body 3, the drilling rod 6, and the like are relatively movable in a direction orthogonal to the traveling rails 50, 50. At that time, one side of the lateral movement frame 8 is pivotally supported by a shaft support 8h attached to the front of the front lateral frame member 8c, as indicated by an arrow in FIG. Is performed by extension (including expansion and contraction) of the lateral movement cylinder 19 which is selectively connected to either one of the connecting portions 8j and 8j attached to both ends of the front horizontal frame member 18c of the frame main body 18A.

  Further, a winch 20 for moving the base frame 18 is attached to the upper part of the base frame 18 behind the frame main body 18A, and the base frame 18 can be moved on the traveling rail by a wire (not shown). ing. Moreover, if the winch 20 and the wire are always connected in the inclined mine shaft and the other end of the wire is fixed to one of the mine shafts, the escape can be prevented.

<Embodiment of drilling method using mobile drilling machine for tunnels>
An embodiment of a drilling method using the in-tunnel mobile drilling machine 11 according to the present invention will be described with reference to FIGS. FIG. 7 is a diagram for explaining the outline of one embodiment, and FIG. 8 is a cross-sectional view showing the relationship between the advanced guide shaft (segment), the surrounding ground, and the radially drilled holes.

  As shown in FIG. 7 (1), the in-tunnel mobile drilling machine 11 according to the present invention is shielded in advance at the approximate center of the planned cross section of the tunnel T as shown in FIG. 7 (1). An advanced guide shaft S is formed by a machine, and as shown in FIG. 7 (2), holes are drilled from the advanced guide shaft S toward the peripheral ground R of the planned cross section of the tunnel T in a substantially radial manner. The hardened material is injected into the hole through the injection pipe to reinforce the peripheral ground R of the planned cross section of the tunnel T. As shown in FIG. By excavating the ground between the outer periphery of the guide shaft S with an excavator and further dismantling the advanced guide shaft S, it is suitably used for the construction method in which the large diameter tunnel T is formed. In this construction method, the segments 52, 52,... On the inner peripheral surface of the advanced guide shaft S and a plurality of pre-penders (not shown) on the circumference of the segments 52, 52,. Drilling is performed in a state in which the hole rods 6, 6,... Are inserted and drilling is performed, and then a hardener is injected from these. Accordingly, in the mobile drilling machine 11 for tunnels capable of drilling in a radial direction substantially perpendicular to the axis of the advanced guide shaft S, the boom is provided on the face side of the advanced guide shaft S, and a drifter is provided at the tip of the boom. It is easier to insert the drilling rods 6, 6,... Into the pre-pender than the conventional drilling machine to which the main body is attached, and the work efficiency and workability are remarkably excellent.

  The above-described drilling method will be described in detail with reference to FIGS. 1 to 3. Prior to installing the in-tunnel mobile drilling machine 11, first, the segments 52, 52,. The supporting members 51, 51,... Made of H steel or the like are attached to the segment 52, 52, with a predetermined interval (for example, 1 meter interval) like a sleeper over the longitudinal direction of the advanced guide shaft S. It arrange | positions in the state overlaid in parallel under .... After that, on these support members 51, 51,..., Two parallel traveling rails 50, 50 that extend in a strip shape in the longitudinal direction of the advanced guiding shaft S, have a substantially H-shaped section and have a flange surface as a traveling surface. Is disposed. Then, a plurality of pre-penders are attached to the arc-shaped segments 52, 52,. Thereafter, the mine mobile drilling machine 11 may be installed on the traveling rails 50, 50.

  When drilling, first (first procedure), the mobile drilling machine 11 in the tunnel is moved to the desired position on the traveling rails 50, 50 (the segment 52 to be drilled). Position). Then, the clamps 18D, 18D, 18D, and 18D are locked to the lower part of the traveling surface (flange surface) of the traveling rails 50 and 50, and the in-tunnel mobile drilling machine 11 is fixed on the traveling rails 50 and 50. In addition, the jacks 18E, 18E, 18E, 18E are lowered, and the support members 51, 51,... Further, the telescopic legs 17a and 17a of the two bearing portion fixing members 17 and 17 are extended from the inside of the sheath tubes 17b and 17b, the tips are brought into contact with the surface of the segment 52, and the sheath tube 17b is screwed by a screw or the like not shown. , 17b is fixed from the side surfaces of the telescopic legs 17a, 17a.

  Second (second procedure), aiming at the desired pre-pender (pre-pender to be inserted) formed in the segment 52, the drifter body 3 is moved upward by the digging cylinder 30 so that the tip is moved to the tip. The drilling rods 6, 6,... Fitted with the drilling bits are moved upward. When the drilling rods 6, 6,... Can be inserted into the pre-pender, the guide cell fixing cylinder 16b of the guide cell fixing member 16 is extended, and the tip of the extendable leg 16a is brought into contact with the surface of the segment 52 and fixed. To do. Then, the peripheral ground R is drilled to a predetermined length.

  If the drilling rods 6, 6,... Cannot be successfully inserted into the desired pre-pender, etc., the tunnel-type mobile drilling machine 11 is moved on the traveling rails 50, 50, or the lateral movement frame 8 is moved. Are moved laterally in the width direction of the frame main body 18A, and with respect to the inclination, the longitudinal direction of the tunnel is made relative to the tunnel by making the drifter body 3 and the drilling rods 6, 6,. Position adjustment may be performed as appropriate by inclining forward or backward. The position adjustment is not limited to this stage.

  The drilling hole is rotated 360 degrees around the axis 4 with respect to the pre-pender located on the same circumference of the segment 52 at a desired position, and the drifter body 3 and the drilling rods 6, 6,. By doing so, the work is performed almost radially over the entire circumference of the segment 52 substantially perpendicular to the shaft center of the mine shaft. Note that the method of turning is not limited to the case of sequentially inserting the drilling rods 6, 6,... Into the adjacent prependers on the basis of the position of the prepender that was initially drilled, and appropriately, Drilling is performed by determining the drilling order while considering the ground conditions. For example, after finishing drilling with the pre-pender located at the top of the segment 52, drilling with the pre-pender located at the bottom, and then cutting with the left-most or right-most pre-pender in the cross section of the segment width direction. In some cases, holes are made.

  The above steps (first and second procedures) may be sequentially drilled while appropriately changing the position of the segment 52 to be drilled. At this time, in the selection of the drilling order of the segment 52 to be drilled, the drilling order may be determined in consideration of the ground condition, and the segment 52 adjacent to the segment 52 that has drilled first is not necessarily required. On the other hand, it is not limited to drilling sequentially.

  In addition, when injecting a hardening material into the peripheral ground R and creating an improved body, an injection tube (not shown) may be inserted into the drilled pre-pender and the hardening material may be injected. In this case, the previous drilling rods 6, 6,...

  In addition, as shown in FIG. 8, when the advanced guiding shaft S cannot be formed in the approximate center of the planned cross section of the tunnel T, or when the axis of the advanced guiding shaft S is not projected onto the central axis of the rail. (For example, when other construction equipment is placed in the advanced guide shaft S, and it becomes an obstacle, and the traveling rails 50, 50 cannot be laid in the approximate center of the advanced guide shaft S cross section) The lateral movement frame 8 is laterally moved in the width direction of the frame main body 18A, thereby adjusting the positions of the guide cell 2 and the drifter main body 3, so that the drilling position is the axis of the advanced guide shaft S and the traveling rail 50 , 50 in the same state as projected onto the central axis, the radial holes can be formed by decentering from the axis of the advanced guide shaft S.

<Other Embodiment of Drilling Method Using Mobile Drilling Machine for Tunnels>
As described above, the in-tunnel mobile drilling machine 11 according to the present invention has segments 52, 52,... On the inner peripheral surface of the tunnel beforehand, and on the circumference of the segments 52, 52,. In addition, the method is not limited to a method in which drilling is performed only in a state where a plurality of pre-penders are attached, and can be used for various drilling methods. For example, as long as the traveling rails 50, 50 are provided at the bottom or bottom of the mine shaft, they can be used without the segments 52, 52,... And the pre-pender installed. Will be perforated .

It is a front view of the mobile drilling machine for tunnels installed in the segment attached to the tunnel. It is a side view of the mobile drilling machine for tunnels. It is a top view of the mobile drilling machine for tunnels. It is a rear view of the mobile drilling machine for tunnels. It is an enlarged front view centering on the inside of the gear box of the mobile drilling machine for tunnels. It is a partial enlarged side view for demonstrating a guide cell, a rod holder, and the raising / lowering hydraulic cylinder. It is a figure for demonstrating the outline | summary of one embodiment of the drilling method using the mobile drilling machine for tunnels. It is sectional drawing which shows the relationship with an advanced guide mine (segment), a surrounding ground, and the hole drilled radially.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Drilling machine for tunnels, 2 ... Guide cell, 3 ... Drifter main body, 4 ... Shaft, 5 ... Bearing part, 6 ... Drilling rod, 7 ... Mounting frame, 7a ... Hydraulic cylinder for mounting frame, 8 ... For lateral movement Frame, 8a ... Left vertical frame material, 8b ... Right vertical frame material, 8c ... Front horizontal frame material, 8d ... Rear horizontal frame material, 8e ... Axle support piece, 8f ... Pin, 8g ... Sliding plate, 8h ... Axis support part , 9 ... Gear box, 10 ... Rack, 11 ... Mobile drilling machine for tunnels, 12 ... Rod holder, 13 ... Hydraulic cylinder for rack, 14 ... Hydraulic cylinder for lifting, 15 ... Hydraulic unit, 15a ... Startup panel 16 ... guide cell fixing member, 16a ... telescopic leg, 16b ... guide cell fixing cylinder, 17 ... bearing fixing member, 17a ... telescopic leg, 17b ... sheath tube, 18 ... base frame, 18A ... frame main body, 18B ... Roller, 18D ... Clan 18E ... Jack, 18a ... Left vertical frame member, 18b ... Right vertical frame member, 18c ... Front horizontal frame member, 18d ... Rear horizontal frame member, 18e ... Horizontal frame member, 18g ... Guide rail, 8j ... Connecting portion, 19 Cylinder for lateral movement, 20 ... winch, 30 ... cylinder for excavation, 50 ... rail for traveling, 51 ... support member, 52 ... segment, T ... main tunnel, S ... advanced tunnel, R ... peripheral ground.

Claims (8)

A support member erected below the inside of the tunnel formed in the ground or in the ground ,
A traveling rail disposed on the support member and extending in the longitudinal direction of the mine shaft;
A drilling machine for tunnels that drills with a drilling rod from the inside to the outside in the cross section of the tunnel while traveling on the traveling rail ,
The borehole drilling machine includes a gantry, a bearing portion supported by the gantry, a guide cell having a shaft pivotally supported by the bearing portion , and attached to the guide cell so as to be vertically movable. A drift holder body, a rod holder that is attached to one of the longitudinal ends of the guide cell so as to be vertically movable in the drilling direction, and a lift that moves the rod holder up and down in the drilling direction. and use a hydraulic cylinder, equipped with a,
By rotating the guide cell, from the pit wall of the mine shaft, 360 degrees centered on the axis, and substantially radially drilled perpendicularly to the shaft center of the mine shaft,
This is a mobile drilling machine for tunnels. A tip portion opposite to the rod holder definitive to guide cells of the tunnels in a drilling machine, telescopic guide cell fixing member for abutting pushing on pit wall opposite the tunnel and drilling direction is provided 2. The tunnel according to claim 1 , wherein the guide cell fixing member takes a fulcrum on the wall surface of the well when drilling, and the guide cell is fixed by the guide cell fixing member and the shaft. Internal mobile drilling machine. In the bearing portion of the borehole drilling machine, a telescopic bearing portion fixing member that abuts and presses above the pit wall of the tunnel is substantially V-shaped with the bearing portion as a top when viewed from the cross section of the tunnel. It provided two as is the case of drilling, a configuration in which the bearing portion by the bearing portion fixing member is fixed Rutotomoni,
The travel rail has a substantially H-shaped flange portion as a travel surface,
The gantry drilling machine frame is attached to the base frame,
The base frame supports a roller portion that can move on the traveling rail, a clamp portion that can be locked to a lower portion of the flange portion, and can fix the drilling machine on the rail, and the traveling rail. And a telescopic jack portion that presses on a support member previously arranged in a sleeper shape,
When drilling, the clamp part is locked to the lower part of the flange part of the running surface, and the jack part presses the support member, so that the mobile drilling machine for tunnels is used as a running rail. It was designed to be fixed on the top ,
The mobile drilling machine for tunnels according to claim 1 or 2. The inside of a tunnel according to any one of claims 1 to 3, wherein the drilling machine for a tunnel is provided with a jack capable of pressing the support member by extending while being positioned on the support member. Mobile drilling machine. Inside the mine shaft, a large number of arcuate segments that are connected to the entire inner circumference of the mine shaft to form a lining body and constitute the mine wall, and on the circumference of the segment when viewed from the cross section of the mine shaft A plurality of pre-penders attached at predetermined intervals to the pre-pender, and when drilling, the drilling rod is inserted into the pre-pender and configured to drill holes. The mobile drilling machine for tunnels according to any one of 1 to 4. The in-hole drilling machine includes a base frame and a lateral movement frame mounted on the base frame so as to be laterally movable in a direction perpendicular to the traveling rail. ,
A front portion of the gantry is pivotally supported by a shaft support piece attached to the lateral movement frame by a pin extending in a lateral direction, and a rear portion of the gantry is supported by a rear portion of the lateral movement frame. It is connected to the attached hydraulic cylinder for the extendable base,
By the expansion and contraction of the gantry hydraulic cylinder, the gantry rotates with the pin as a fulcrum, and the guide cells are inclined forward or backward in conjunction with the rotation, and the drifter body and the drilling rod are tunnels. With respect to the longitudinal direction of the mine shaft relative to the front or rear,
By the lateral movement of the lateral movement frame, the guide cell is configured to be laterally movable in a direction perpendicular to the traveling rail.
The in- tunnel mobile drilling machine according to claim 5 . The borehole drilling machine includes a pinion attached to the shaft of the guide cell, two racks that engage with the pinion from the left and right sides thereof, and a vertically movable rack. It is equipped with a telescopic hydraulic cylinder for racks attached in a posture
By extending one of the rack hydraulic cylinders and retracting the other, the rack moves up and down in conjunction with each other, whereby the pinion rotates clockwise or counterclockwise. The guide cell is configured to rotate through a shaft.
The mobile drilling machine for tunnels according to any one of claims 1 to 6 . A support member is installed below the inside of the tunnel formed in the ground or in the ground,
On this support member, a traveling rail extending in the longitudinal direction of the mine shaft is disposed,
Installing a drilling machine for tunnels on the rail for traveling,
A drilling method for drilling with a drilling rod from the inside to the outside of the tunnel cross section while moving the drilling machine for tunnels on the traveling rail,
As the drilling machine for tunnels, a gantry, a bearing portion supported by the gantry, a guide cell having a shaft pivotally supported by the bearing portion, and attached to the guide cell so as to be vertically movable A drift holder body, a rod holder that is attached to one of the longitudinal ends of the guide cell so as to be vertically movable in the drilling direction, and a lift that moves the rod holder up and down in the drilling direction. Using a borehole drilling machine equipped with a hydraulic cylinder for
During the drilling, the guide cell is rotated, so that the drilling is performed from the pit wall of the mine shaft to 360 degrees centering on the axis and substantially perpendicular to the shaft center of the mine shaft.
A drilling method using a tunnel-type mobile drilling machine characterized by the above.

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