US20050034896A1 - Pipe burying method - Google Patents

Pipe burying method Download PDF

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Publication number
US20050034896A1
US20050034896A1 US10/806,337 US80633704A US2005034896A1 US 20050034896 A1 US20050034896 A1 US 20050034896A1 US 80633704 A US80633704 A US 80633704A US 2005034896 A1 US2005034896 A1 US 2005034896A1
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United States
Prior art keywords
reamer
main body
burying
earth
rod
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Abandoned
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US10/806,337
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English (en)
Inventor
Toyohiko Youan
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Komatsu Ltd
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Komatsu Ltd
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Assigned to KOMATSU LTD. reassignment KOMATSU LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: YOUAN, TOYOHIKO
Publication of US20050034896A1 publication Critical patent/US20050034896A1/en
Abandoned legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/05—Swivel joints
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/28—Enlarging drilled holes, e.g. by counterboring

Definitions

  • the present invention relates to a pipe burying method for burying a pipe such as a water pipe, a gas pipe, a drain pipe, a sheath pipe for a signal cable, and a fiber cable or the like (hereinafter, referred to as “a buried pipe”) in the earth.
  • a pipe such as a water pipe, a gas pipe, a drain pipe, a sheath pipe for a signal cable, and a fiber cable or the like (hereinafter, referred to as “a buried pipe”) in the earth.
  • a pipe burying method for burying a pipe such as a water pipe, a gas pipe, a drain pipe, a sheath pipe for a signal cable, and a fiber cable or the like (hereinafter, referred to as “a buried pipe”) in the earth is roughly divided into a drive construction method for driving the earth and burying a pipe, and a non-drive construction method for burying a pipe without driving the earth.
  • the both construction methods have an advantage and a disadvantage, respectively.
  • the non-drive construction method has an economical advantage such that a pipe can be easily buried as crossing under an orbit of a railroad and a river or the like and a pipe can be buried while preserving the environment, and further, the non-drive construction method is a short construction schedule.
  • a so-called power shovel or the like is used; however, according to the non-drive construction method, a horizontal drill is used.
  • This horizontal drill has a two process system including a pilot excavation, enlargement of a diameter, and retracting a buried pipe, and the present invention relates to a reamer apparatus which is used for a ground boring machine to be used in this two process system.
  • a penetration pit P 1 , a starting pit P 2 , and an attainment pit P 3 are formed on the earth at certain intervals each other.
  • a drilling fluid feeder 101 and a drill driving device 102 (constructing a horizontal drill) are disposed.
  • a buried pipe 104 is disposed in the vicinity of the attainment pit P 3 , of which length approximately equivalents to a distance from the starting pit P 2 to the attainment pit P 3 . This is a preparation operation.
  • the drill driving device 102 is defined to be freely promote in the earth as adding a plurality of hollow rods 105 , and further, on the contrary, the drill driving device 102 is defined to be freely pulled out from the earth as adding a plurality of hollow rods 105 .
  • the drilling fluid feeder 101 stores a drilling fluid such as a crystal water, a muddy water, a bentonite muddy water or the like therein and at the same time, the drilling fluid feeder 101 can freely pressure feed the stored drilling fluid into a hollow of the hollow rod 105 which is disposed on the drill driving device 102 via a hose 107 .
  • the first hollow rod 105 is installed to be supported.
  • a leading body (a pilot head) 105 a with an outer diameter of about 70 to 100 mm is fit in advance.
  • an outer diameter of the hollow rod 105 is about 40 to 50 mm.
  • the first hollow rod 105 penetrates through the penetration pit P 1 obliquely at a penetration angle ⁇ (nearly equal to 15°) if the earth is approximately horizontal; the first hollow rod 105 is promoted in an arrow direction A 1 toward the starting pit P 2 without no rotation while rotating the hollow rod 105 ; and bending it horizontally, a pilot hole 108 is formed in the starting pit P 2 . Further, as adding the hollow rods 105 to the attainment pit P 3 via the starting pit P 2 , the hollow rods 105 are promoted in the earth in an arrow direction A 2 .
  • the rotational motor 130 in the case of drilling and making a linear hole, while rotating the oblique leading body 105 a that is fit to this rod front end by means of a rotational motor 130 of the drill driving device 102 via the rod 105 , the rotational motor 130 is promoted along a frame 131 .
  • the rotational motor 130 in the case of changing a direction (in the case of drilling and making a curved hole), the rotational motor 130 is not rotated but stopped, and under this state, the rotational motor 130 is promoted along the frame 131 (the rod 105 is promoted).
  • the direction of the oblique leading body 105 a is changed to the opposite direction of the oblique-cut surface to be promoted.
  • the rod 105 by promoting the rod 105 , the curved hole is drilled so that the oblique leading body 105 a attains to the attainment pit P 3 .
  • the pilot head 105 a has a plurality of nozzle holes (illustration thereof is omitted) communicating through the hollow of the hollow rod 105 . Therefore, upon promoting the pilot head, the drilling fluid that is pressure-fed from the drilling fluid feeder 101 is emitted backward so as to discharge the drilling fluid and the drilled earth and sand backward.
  • the leading body (the pilot head) 105 a protrudes in the attainment pit P 3 , the pilot hole 108 is completed. Then, the pilot head 105 a is removed. Then, a reamer apparatus provided with a reamer (a diameter enlarging device) is fit, which reamer has a diameter approximately identical with or slightly larger than a pipe diameter of the buried pipe 104 .
  • a reamer of this reamer apparatus As a conventional reamer of this reamer apparatus, there is a cone-shaped one, namely, a so-called fusiform-shaped one corresponding to pebbles and gravel-blended earth (for example, refer to JP-A 2001-73440 (pages 6-9, FIG. 1 )). As shown in FIG. 12 , a reamer 109 of this reamer apparatus is provided with a spiral groove 109 b at its outer peripheral surface and a plurality of nozzle holes 109 a communicating through the hollow of the hollow road 105 .
  • the hollow rod 105 is retracted into a direction of an arrow B 2 shown in FIG. 11 while rotating the hollow rod 105 by means of the drill driving device 102 .
  • the earth and sand generated in this time is discharged from a space between the pilot hole 108 and an outer diameter of the rod by emitting the drilling fluid.
  • a part of the drilling fluid comes round to a rear side to carry out a roll of a lubricant for the buried pipe 104 .
  • the cut earth is confined in an inner wall of a hole at an outer periphery of the reamer 109 by rotation and retracting of the reamer 109 , and thereby, the diameter of the pilot hole 108 is enlarged and the buried pipe 104 is retracted in the enlarged hole to be formed along the direction of the arrow B 1 .
  • the above-described drilling fluid is used for discharging the drilled earth and sand, lubrication and cooling of the oblique leading body (pilot head) 105 a or the reamer 109 , and smooth promotion of the rod 105 , and further, the bentonite fluid is used for preventing the earth and sand from falling in a drilled hole and improving a pressure density for the wall of the drilled hole.
  • the sandy soil has a large falling property, it is necessary to make a blade height of the drilling blade small (in this case, if the height of the drilling blade is made low, an amount of drilling is made small).
  • a reamer having a large blade width and a high blade height can be used, however, if the blade width is large in the soft soil, the friction resistance becomes large, so that the reamer itself is damaged or a large rotation driving force is needed.
  • the reamer having the large blade width and the high blade height is used in the soft soil
  • the reamer having the small blade width and the high blade height is used in the viscous soil
  • the reamer having the large blade width and the low blade height is used in the sandy soil.
  • the present invention has been made taking the foregoing problems into consideration and an object thereof is to provide a pipe burying method by which a diameter of a pilot hole can be efficiently and reliably enlarged depending on various types of soil and a burying operation of a buried pipe is made stable.
  • a pipe burying method is used for burying a buried pipe 1 in the earth by using a reamer 6 having a reamer main body 8 that is approximately cone-shaped, of which diameter is contracted toward the side into which it is retracted, and a platy member 9 to be annexed to the outer surface of this reamer main body 8 and to form a drilling part
  • the method includes the steps of preparing various types of platy members 9 , selecting a platy member 9 suitable for a soil type from among the various types of platy members 9 on the basis of a soil type search of a burying place, attaching the selected platy member 9 to a reamer main body 8 to form a reamer 6 suitable for the soil type, annexing this reamer 6 at a front end of a rod 3 in a pilot hole 5 in the earth; pulling out this rod 3 from the pilot hole 5 while rotating the reamer 6 together with the rotation of the rod 3 , and burying
  • the reamer 6 since the reamer 6 is suitable for a soil type of a burying place where the pilot hole 5 is formed, the reamer 6 can drill the earth by the drilling amount corresponding to the soil type and evading falling of earth and sand into the hole with the enlarged diameter after enlarging the diameter, the reamer 6 can smoothly carry out the retracting operation of the buried pipe 1 . In addition, preventing excess load and friction force from being given to a drilling blade of the reamer 6 , the damage of the reamer 6 can be prevented. Thereby, the used reamer 6 can be used stably for a long time.
  • a platy member 9 to be attached to a reamer main body 8 , various types of reamer 6 can be formed and this makes it possible to form the reamer 6 easily corresponding to a soil property of the burying place.
  • the reamer main body 8 can be shared, a cost can be decreased and stock control becomes simple.
  • the platy member may be attached to the reamer main body 8 at a scene of burring, or before going to the burying scene, the platy member 9 suited for the soil type of this burring scene may be attached to the reamer main body 8 so as to form the reamer 6 that is suited for the soil type.
  • the platy member 9 is attached to the reamer main body 8 at the burying scene, even if the soil type at the burying scene is different from the soil type that was inspected in advance, by attaching the platy member 9 to the reamer main body 8 at this burying scene, it is possible to form the reamer 6 that is suited for the soil type.
  • the platy member 9 is attached to the reamer main body 8 before going to the burying scene, it is possible to omit the attachment operation (operation such as welding or the like) at the burying scene and the burring operation time can be shortened. Further, since there is no necessity to bring a welding device or the like to the scene, an operator can easily move to the scene.
  • a pipe burying method is used for burying a buried pipe in the earth by using a reamer 6 , and the method includes the steps of preparing various types of reamers 6 , selecting a reamer 6 suitable for a soil type from among the various types of reamers 6 on the basis of a soil type search of a burying place, annexing the selected reamer 6 at a front end of a rod 3 in a pilot hole 5 in the earth, pulling out this rod 3 from the pilot hole 5 while rotating the reamer 6 together with the rotation of the rod 3 , and burying a buried pipe 1 to be connected to the reamer 6 in the earth.
  • the pipe burying method of the second aspect since the reamer 6 that is suited for a soil type of the burying place among plural types of reamer 6 at the burying scene, by using the reamer 6 in accordance with various types of soil, the diameter enlargement operation of the pilot hole 5 can be carried out and this leads to the stable pipe burying operation.
  • the reamer 6 in the pipe burying method, has a reamer main body 8 that is approximately cone-shaped, of which diameter is contracted toward the side into which it is retracted, and a platy member 9 to be annexed to the outer surface of this reamer main body 8 and to form a drilling part, and various types of reamers are formed by changing this platy member 9 .
  • the pipe burying method of the third aspect since various types of reamer 6 can be formed by changing the platy member 9 to be attached to the reamer main body 8 , it is possible to simply form the reamer 6 that is suited to the soil type of the burying place. In addition, also in this case, if the platy member 9 is changed, different types of reamer 6 can be formed, so that the reamer main body 8 can be shared. Thereby, the cost can be decreased and the stock control can be simply carried out.
  • FIG. 1 is a simplified view showing an embodiment of a pipe burying method according to the present invention
  • FIG. 2 is a simplified view showing a method for forming a pilot hole
  • FIG. 3 is a cross sectional view of a reamer device of a ground boring machine to be used for the pipe burying method
  • FIG. 4 is a side view showing a reamer of the reamer device
  • FIG. 5 is a front view showing a reamer of the reamer device
  • FIG. 6 is a substantial part enlarged cross sectional view of the reamer device
  • FIGS. 7A and 7B are substantial part enlarged cross sectional views of the reamer of the reamer device
  • FIGS. 8A and 8B are rear views of a reamer main body of the reamer device
  • FIGS. 9A to 9 E are cross sectional views showing a platy member of the reamer device
  • FIG. 10 is a simplified view showing a method for forming a pilot hole by the ground boring machine
  • FIG. 11 is a simplified view showing a pipe burying method of a buried pipe by the ground boring machine.
  • FIG. 12 is a simplified view showing a conventional reamer device of the ground boring machine.
  • a pilot hole 5 as shown in FIG. 2 is formed.
  • This pilot hole 5 is formed by the above-described operation shown in FIG. 10 and this operation will be briefly described below with reference to FIG. 1 .
  • a penetration pit P 1 , a starting pit P 2 , and an attainment pit P 3 are formed on the earth at certain intervals each other.
  • a rod (a hollow rod) 3 with a leading body (a pilot head) 3 a fit at its front end is installed to be supported.
  • the drilling fluid a crystal water, a muddy water, and a bentonite muddy water or the like
  • the this hollow rod 3 penetrates through the penetration pit P 1 obliquely at a penetration angle ⁇ (for example, about 15°) if the earth is approximately horizontal; the hollow rod 3 is promoted in an arrow direction A 1 toward the starting pit P 2 without no rotation while rotating the hollow rod 3 ; and bending it horizontally, the pilot hole 5 is formed in the starting pit P 2 .
  • the hollow rods 3 are promoted in the earth in an arrow direction A 2 .
  • the rotational motor 81 is promoted along a frame 82 .
  • the rotational motor 81 is not rotated but stopped, and under this state, the rotational motor 81 is promoted along the frame 82 (the rod 5 is promoted).
  • the direction of the oblique leading body 3 a is changed to the opposite direction of the oblique-cut surface to be promoted.
  • the pilot head 3 a has a plurality of nozzle holes (illustration thereof is omitted) communicating through the hollow of the hollow rod 3 . Therefore, upon promoting the pilot head, the drilling fluid that is pressure-fed from the drilling fluid feeder 4 is emitted backward so as to discharge the drilling fluid and the drilled earth and sand backward.
  • the pilot head 3 a protrudes in the attainment pit P 3 . Then, the pilot head 3 a is removed. Then, a reamer apparatus provided with a reamer 6 (a diameter enlarging device) is fit, which reamer has a diameter approximately identical with or slightly larger than a pipe diameter of the buried pipe 1 . After fitting the reamer apparatus, the hollow rod 3 is retracted into a direction of an arrow B 2 shown in FIG. 2 while rotating the hollow rod 3 by means of the drill driving device 2 . The earth and sand generated in this time is discharged from a space between the pilot hole 5 and an outer diameter of the rod by emitting the drilling fluid.
  • a reamer apparatus provided with a reamer 6 (a diameter enlarging device) is fit, which reamer has a diameter approximately identical with or slightly larger than a pipe diameter of the buried pipe 1 .
  • the hollow rod 3 is retracted into a direction of an arrow B 2 shown in FIG. 2 while rotating the
  • a part of the drilling fluid comes round to a rear side to carry out a roll of a lubricant for the buried pipe 1 .
  • the cut earth is confined in an inner wall of a hole at an outer periphery of the reamer 6 by rotation and retracting of the reamer 6 , and thereby, the diameter of the pilot hole 5 is enlarged and the buried pipe 1 is retracted in the enlarged hole to be formed along the direction of the arrow B 1 .
  • the reamer device is provided with the above-described reamer 6 , and this reamer 6 is connected to the buried pipe 1 via a coupled structure 7 .
  • the reamer 6 is provided with the reamer main body 8 that is approximately cone-shaped, of which diameter is contracted toward the side into which it is retracted, and a plurality of platy members 9 to be attached to the outer surface of this reamer main body 8 .
  • the approximately hollow cone-shaped reamer main body 8 is referred to as an approximately hollow cone-shaped one not only when it is a pure cone shape but also when it is configured by a short cylindrical base end body 8 a and a front end taper portion 8 b as shown in FIG. 3 or the like, further when a rod connection part 24 to be described later is projected at its front end, and when something (a Swivel joint 34 or the like to be described later) is contained therein.
  • This platy member 9 is configured by a platy member main body 9 a and a curing processing part 9 b to be provided on the outer surface of this platy member main body 9 a as sown in FIG. 7A .
  • this platy member 9 is disposed on the reamer main body 8 from its front end portion to the base end portion so that it is declined to a shaft core of the reamer main body 8 at a prescribed angle.
  • the platy member 9 is attached (secured) to the reamer main body 8 by welding to be disposed in a spiral formation.
  • the curing processing part 9 b is formed by diffusion of a super hard particle.
  • a super hard particle for example, a tungsten carbide or the like of a high melting point metal-based sinter can be used.
  • the curing processing part 9 b is provided at the side of a cutting blade 10 of the platy member main body 9 a and the side of an outer surface 11 of the platy member main body 9 a ; however, it may be disposed only at the side of the cutting blade 10 or may be disposed at the side of the outer surface 11 .
  • FIG. 7A the curing processing part 9 b is provided at the side of a cutting blade 10 of the platy member main body 9 a and the side of an outer surface 11 of the platy member main body 9 a ; however, it may be disposed only at the side of the cutting blade 10 or may be disposed at the side of the outer surface 11 .
  • cutout parts 12 of a peripheral direction are provided at a prescribed pitch along a longitudinal direction of the platy member 9 .
  • These cutout parts 12 become grooves (spaces) for releasing earth and sand upon drilling so as to decrease a friction resistance.
  • a reference mark W denotes a welding part and it is provided at the opposite side of the cutting blade 10 .
  • the drilling part since the drilling part is projected from the outer surface of the reamer main body 8 , as shown in FIG. 7B , the drilling part may be formed by burying the super hard chip 90 in the reamer main body 8 .
  • the super hard chip 90 is configured by a main body part 90 a projecting (exposed) from the outer surface of the reamer main body 8 and a projection part 90 b projecting from this main body part 90 a , and this projection part 90 b is fit in a hole portion of the reamer main body 8 . Then, by this main body part 90 a , the drilling part may be formed.
  • a reference numeral 91 denotes a member for preventing a retaining member such as a stop ring or the like.
  • concave grooves 13 are formed between respective platy members 9 .
  • This concave groove 13 becomes a discharge groove of the drilled earth.
  • a cutout part 14 is disposed at a rear end edge portion of the concave groove 13 . This cutout part 14 has a function to discharge the earth and sand entered in the concave groove 13 to the rear side.
  • a plurality of emission ports 15 for emitting the drilling fluid is disposed along the platy member 9 .
  • a screw hole 16 is provided at the peripheral wall of the reamer main body 8 , and a nozzle member 17 is fit in this screw hole 16 .
  • a penetration hole of the nozzle member 17 (a penetration hole in a direction approximately orthogonal to the peripheral wall of the reamer main body 8 ) becomes the emission port 15 .
  • the reamer main body 8 is configured by the cylindrical base end body 8 a and the front end taper portion 8 b , the above-described cutout part 14 is formed at the base end body part 8 a , and the above-described emission ports 15 are formed at the front end taper portion 8 b .
  • a discharge port 18 is provided to discharge the drilling fluid to an oblique rear side.
  • a penetration hole 19 is formed at the peripheral wall of the reamer main body 8 , and a nozzle member 20 is fit to this penetration hole 19 .
  • the nozzle member 20 is composed of a block body 20 a and a nozzle 20 b to be screwed to this block body 20 a.
  • a projection member 21 is defined as a front side of a rotational direction C (refer to FIG. 5 ) of the reamer 6 .
  • This projection member 21 preferably forms a curing processing part to be formed on its surface by the dispersion of the super hard particle.
  • a projection member main body that is not cured may be secured (welded) to the reamer main body 8 , and the curing processing part may be provided on the surface of this main body.
  • the projection member 21 may be formed by a so-called hard facing of the super hard particle and burying of a super hard chip or the like.
  • a disk partition member 22 is fit to an opening part side of a larger diameter of the reamer main body 8 .
  • a hollow chamber 23 is formed on the reamer main body 8 as a passage into which the drilling fluid is supplied.
  • a shaft member 25 is secured to compose a rod connection part 24 (which is provided at an end portion of a smaller diameter of the reamer main body 8 ), to which the rod 3 is connected.
  • the shaft member 25 is composed of a cylinder part 25 a projecting from the partition member 22 , and a shaft part 25 b projecting from this cylinder part 25 a ; a screw hole 26 is disposed on an end surface of the shaft part 25 b ; and a through hole 27 opening from this screw hole 26 to the cylinder part 25 a is provided.
  • the cylinder part 25 a is provided with a plurality of through holes 28 .
  • the partition member 22 is composed of a center part 22 a having a concave portion 29 at the buried pipe side at its shaft core part, and a guard part 22 b extending from this center part 22 a to an outer diameter direction; and the above-described cylinder part 25 a is projected from the rod side of the center part 22 a.
  • a screw part (not illustrated) of the rod 3 is screwed to the screw hole 26 of the shaft part 25 b , and this reamer 6 is fit to the rod 3 .
  • lubricant supplied from the above-described drilling fluid feeder 4 to the rod 3 enters in the cylinder part 25 a via a through hole 27 of the shaft part 25 b to be supplied from this cylinder part 25 a to the hollow chamber 23 via the through hole 28 .
  • the drilling fluid entered in this hollow chamber 23 is discharged from respective emission ports 15 and the discharge port 18 to the outside.
  • the hollow chamber 23 is a passage for supplying the drilling fluid to respective emission ports 15 and the discharge port 18 , this passage may be made of a pipefitting.
  • the rod connection part 24 is composed of the shaft part 25 b projecting from an end portion of a smaller diameter of the reamer main body 8 ; however, the rod connection part 24 may be composed of a part not projecting from the end portion of the smaller diameter of the reamer main body 8 .
  • a screw hole part to which the end portion of the rod 3 is screwed may be disposed in the end portion of the smaller diameter of the reamer main body 8 .
  • the above-described partition member 22 is provided with an emission port 36 for emitting the drilling fluid entered in the above-described hollow chamber 23 to the side of the buried pipe (the rear side).
  • a screw hole 30 is disposed at the partition member 22 , and a nozzle member 31 is fit in the screw hole 30 .
  • a through hole of this nozzle member 31 becomes an emission port 36 .
  • the partition member 22 is provided with a cleaning hole 32 for cleaning the inside of the hollow chamber 23 after using this reamer 6 .
  • the cleaning hole 32 is composed of a screw hole and under a normal usage state, a plug member 33 (refer to FIG. 3 ) is disposed.
  • the emission port 36 and the cleaning hole 32 are two, respectively in this embodiment; however, the number of them is not limited to two.
  • the coupled structure 7 coupling the reamer 6 and the buried pipe 1 is provided with the Swivel joint 34 and a connection tool 35 for connecting this Swivel joint 34 and the buried pipe 1 .
  • the Swivel joint 34 is composed of a non-rotation side member S and a rotation side member R; the non-rotation side member S has a shaft part 39 and a holding plate 40 to be secured to this shaft part 39 ; and the rotation side member R has a base part 37 to be secured to the partition member 22 and a block body 38 to be secured to this base part 37 .
  • the base part 37 is composed of a main body part 37 a having a concave portion 41 , and a guard part 37 b extending in an outer diameter direction from this main body part 37 a .
  • the guard part 37 b is fit in a concave portion for fitting 29 a of the guard 22 b of the partition member 22 .
  • the block body 38 is composed of a ring body and is provided with a through hole 42 and a screw hole 43 .
  • this block body 38 is provided with a protrusion part 44 protruding to the side of the base part 37 and this protrusion part 44 is fit to a peripheral direction cutout area 45 of the base part 37 .
  • a bolt member 46 to be inserted through the through hole 42 is inserted through a through hole 47 of the base part 37 to be screwed into a screw hole 48 of the guard part 22 b of the partition member 22
  • a bolt member 50 to be inserted through a through hole 49 of the base part 37 is screwed into the screw hole 43 of the block body 38 .
  • the base part 37 and the block body 38 are secured to the partition member 22 .
  • a seal member 51 such as an O ring or the like is fit.
  • the above-described shaft part 39 is provided with a pair of protrusion elements 52 at its rear end side, a screw hole 53 is formed on its end surface, and under the state that the holding plate 40 contacts the end surface, a bolt member 54 to be inserted through the holding member 40 is screwed into a screw hole 53 . Then, at the side of the holding member 40 of the shaft part 39 , a bush 55 configuring a bearing is externally fit. In the meantime, the bush 55 is composed of a cylindrical main body 55 a and an outer guard part 55 b projecting from this cylindrical main body 55 a to the outer diameter side. The outer guard part 55 b is fit into a cutout part 56 of the block body 38 .
  • This floating seal 57 is made of a first part 57 a at the rotation side and a second part 57 b at the side of non-rotation.
  • the first part 57 a is fit into a cutout part 58 for fitting of the block body 38
  • the second part 57 b is fit into a cutout part 60 for fitting of a ring-shaped supporting body 59 that is externally fit and secured to the shaft part 39 .
  • the first part 57 a and the second part 57 b are formed by sealing rings 61 a , 61 b , and O rings 62 a , 62 b , respectively.
  • the shaft part 39 is provided with a feeding path 63 for feeding oil to the floating seal 57 , and a plug member 64 is disposed to its feeding port.
  • a feeding path 63 for feeding oil to the floating seal 57
  • a plug member 64 is disposed to its feeding port.
  • connection tool 35 has a pipe joint 65 to be attached to an end of the buried pipe 1 and a joint 66 to connect this pipe joint 65 with the Swivel joint 34 .
  • the pipe joint 65 is composed of a cap part 67 to be secured to the end of the buried pipe 1 and a ring part 68 .
  • the cap part 67 is composed of a main body part 67 a and a cone part 67 b
  • the ring part 68 is projected from an end of this cone part 67 b .
  • the joint 66 has a protrusion element 69 to be inserted between a pair of protrusion elements 52 of the Swivel joint 34 , and a pair of protrusion elements 70 in which the ring part 68 of the pipe joint 65 is inserted.
  • a shaft part 71 is fit to the protrusion elements 52 , and this shaft part 71 is inserted in a protrusion element 69 to be inserted between these protrusion elements 52 .
  • a shaft part 72 to be inserted in the ring part 68 of the pipe joint 65 is fit to a pair of protrusion elements 70 .
  • the Swivel joint 34 can swing against the buried pipe 1 in a direction of an arrow X around the shaft part 72 and can swing in a direction orthogonal to the direction of an arrow X around the shaft part 71 . Accordingly, by a combination of these swinging, the reamer 6 can be bent against the buried pipe 1 . It is a matter of course that the reamer 6 can rotate around a shaft core of the shaft member 25 by the Swivel joint 34 .
  • an outer periphery of the above-described coupled structure 7 is surrounded by a cover 74 for preventing intrusion of the earth and sand.
  • the cover 74 is set so that its outer measure (it is approximately equal to an outer diameter measure of the buried pipe 1 ) is smaller than an inner diameter measure of the base end body 8 a of the reamer main body 8 .
  • a plurality of supporting elements 75 is provided to the partition member 22 at the side of the buried pipe 1 , and one end portion (a front end portion) 74 a of the cover 74 is injected in the inside of the reamer main body 8 so as to externally fit the supporting element 75 .
  • a bolt member 76 is screwed from an outer diameter direction, and this cover 74 is attached to the partition member 22 .
  • the bolt member 76 corresponds to the cutout part 14 of the reamer main body 8 , and this makes it possible to screw this bolt member 76 from the outer diameter direction.
  • a gap 79 is provided between other end portion 74 b (an end portion at the opposite side of the reamer main body) of the cover 74 and the buried pipe 1 .
  • the gap 79 is disposed between the other end portion 74 b of the cover 74 and the cone part 67 b of the cap part 67 of the pipe joint 65 .
  • the rod 3 that is used for forming the pilot hole 5 is connected to the rod connection part 24 of a front end the reamer device so as to carry out the operation for retracting back this rod 3 .
  • the reamer 6 suitable for the soil type is used. Therefore, according to this pipe burying method, in prior to the burying operation, a soil type search of the burying place is carried out. Then, forming the reamer 6 suitable for the soil type, this reamer 6 is used.
  • FIG. 9 plural types of platy members 9 are provided, the platy member 9 suitable for the soil type of that burying place is selected, and the reamer 6 suitable for the soil type is formed by attaching this platy member 9 to the common reamer main body 8 .
  • various types of platy members 9 are prepared such as one having a large thickness measure T as shown in FIG. 9B , one having a small width measure H as shown in FIG. 9C , one having the large thickness measure T and the small width measure H as shown in FIG. 9D , and further, one having a trapezoidal cross sectional shape as shown in FIG. 9E or the like.
  • the soil type search of the burying place is carried out in advance and the platy member 9 suitable for the soil type is selected from among various platy members 9 , and by attaching the selected platy member 9 as shown in FIG. 8B to the reamer main body 8 to which the platy member 9 is not attached as shown in FIG. 8A , the reamer 6 suitable for the soil type is formed.
  • the Swivel joint 34 is attached.
  • the rod 3 is connected with the buried pipe 1 so as to carry out the operation for retracting back this rod 3 .
  • the number of the platy member 9 is three in FIG. 8B ; however, it may be four or two.
  • the number of the platy member 9 is arbitrarily increased or decreased and at least one is available. By changing the number of the platy member 9 , it is also capable of changing the type of the reamer 6 . Further, there is an angle suitable for the soil type considering a rotation rate of the reamer 6 and a thickness measure of the platy member 9 or the like as an angle of inclination of the platy member 9 , and it is preferable that the platy member 9 is fixed on the reamer main body 8 at an angle suitable for the soil type.
  • the rod 3 is retracted in a direction of an arrow B 2 in FIG. 3 while rotating the rod 3 by means of the drill driving device 2 .
  • the earth and sand generated in this time is discharged from a space between the pilot hole 5 and an outer diameter of the rod by emitting the drilling fluid.
  • a part of the drilling fluid comes round to a rear side to carry out a roll of a lubricant for the buried pipe 1 .
  • the cut earth is confined in an inner wall of a hole at an outer periphery of the reamer 6 by rotation and retracting of the reamer 6 , and thereby, the diameter of the pilot hole 5 is enlarged and the buried pipe 1 is retracted in the enlarged hole to be formed along the direction of the arrow B 1 . Then, when the rod 3 is retracted till the front end of the buried pipe 1 protrudes in the starting pit P 2 , the retracting operation of the buried pipe 1 is completed.
  • the reamer 6 has flexibility for the buried pipe 1 , so that the buried pipe 1 can be retracted by stable with stable controllability.
  • this retracting operation is completed, detaching this reamer device from the buried pipe 1 , and pulling out the rod 3 from the starting pit P 1 , and burying respective pitches P 1 to P 3 again, the pipe burying operation is completed.
  • the pilot hole formation operation and the retracting operation of the buried pipe 1 may be repeated.
  • the drilling fluid when the drilling fluid is emitted from the discharge port 18 as well as the described emission ports 15 , the drilling fluid also operates as a lubricant for retracting of the buried pipe 1 , a part of the drilling fluid penetrates in the walls of the enlarged hole and the pilot hole 5 , and the rest thereof returns to the inside of the starting pitch P 2 via the pilot hole 5 and remains there.
  • This retained drilling fluid is sacked by a sacking device (not illustrated) and returns to the drilling fluid feeder 4 , so that it is possible to use the drilling fluid again.
  • the above-described drilling fluid is used for discharging the drilled earth and sand, lubrication and cooling of the oblique leading body (pilot head) or the reamer 6 , and smooth promotion of the rod 3
  • the bentonite fluid is used for preventing the earth and sand from falling in a drilled hole and improving a pressure density for the wall of the drilled hole.
  • the reamer 6 since the reamer 6 is suitable for the soil type of a burying place where the pilot hole 5 is formed, the earth can be drilled by a drilling amount in accordance with the soil type, and falling or the like of the earth and sand to the hole with the enlarged diameter after enlarging the diameter is evaded, so that the retracting operation of the buried pipe 1 can be smoothly carried out.
  • the excess load and friction force from being given to the drilling blade of the reamer 6 , it is possible to evade the damage of the reamer 6 or the like. Thereby, it is possible to stably use the used reamer 6 for a long time.
  • the platy member 9 is composed of the platy member main body 9 a and the curing processing part 9 b , which is a surface (a surface at the side of the cutting blade 10 and a surface at the side of the outer surface 11 ) of this platy member main body 9 a , so that the curing processing part 9 b may be formed before mounting the reamer 6 on the reamer main body 8 or the curing processing part 9 b may be formed after mounting the reamer 6 on the reamer main body 8 .
  • the reamer 6 corresponding to the soil type is allowed to be formed at the burying scene.
  • the platy member 9 suitable for the soil type is selected at the burying scene, and this selected platy member 9 is mounted on the reamer main body 8 by welding so as to form the reamer 6 suitable for the soil type.
  • various reamers 6 are manufactured in advance, these plural reamers 6 are brought to the burying scene, and at the burying scene, the reamer 6 suitable for the soil type is selected and used. Also in this case, it is preferable that the Swivel joint 34 is mounted. Therefore, since the reamer 6 suitable for the soil type of the burying place may be selected from among these various reamers 6 at the burying scene, by using the reamer 6 corresponding to various soil types, the diameter enlarging operation of the pilot 5 can be used, and this allows a stable pipe burying operation to be carried out. In the meantime, since the reamer 6 can be formed by mounting the platy member 9 on the reamer main body 8 , by changing the platy member 9 to be mounted, various reamers 6 can be formed.
  • the drilling part can be formed, so that the cutting machining for the groove machining can be omitted and thereby, a manufacturing cost can be decreased and machining performance can be improved.
  • a wall thickness of the reamer main body 8 that is approximately shaped in a hollow cone shape can be made small so as to make the entire reamer lighter. Therefore, it is possible to make the detachment operation of the reamer 6 for the rod 3 in the pitch simple.
  • the platy member 9 of the reamer 6 is excellent in abrasion resistance and it carries out an excellent function as the diameter enlargement tool for a long time because it is composed of the platy member main body 9 a and the curing processing part 9 b , namely, the surface thereof.
  • the curing processing part 9 b is formed by dispersion of the super hard particle, the curing processing part that is highly hard can be easily formed. If this curing processing part 9 b is provided with the cutout parts 12 as in the above-described embodiment, the cutout parts 12 become grooves (spaces) for releasing earth and sand upon drilling so as to decrease a friction resistance.
  • the platy member 9 is arranged in a spiral shape, the reamer main body 8 smoothly rotates to reliably enlarge the diameter of the pilot hole 5 . Thereby, the buried pipe 1 is smoothly retracted in this hole of the enlarged diameter.
  • the concave grooves 13 are formed between the platy members 9 , and this concave groove 13 becomes a discharge groove of the drilled earth.
  • a plurality of emission ports 15 for emitting the drilling fluid is disposed in this concave groove 13 , so that there is a gap between the emission port 15 and the inner peripheral wall of the pilot hole 5 , the drilling fluid is easily emitted from this emission port 15 and the cutout part 14 is formed in the concave groove 13 , and this makes it possible to discharge the earth and sand entered in the concave groove 13 from this cutout part 14 to the rear side and to effectively discharge the drilled earth. Therefore, a drilling capability of this reamer device can be improved.
  • the projection members 21 for preventing the earth and sand from entering in the emission ports 15 are disposed in the vicinity of the emission ports 15 of the reamer main body 8 at the front side of a rotational direction C, these projection members 21 can prevent the earth and sand from entering in the emission ports 15 .
  • the projection member 21 upon enlarging the diameter of the pilot hole 5 while rotating the reamer 6 , the projection member 21 becomes a protection wall against the earth and sand entering into the emission port 15 so as to evade clogging of this emission port 15 .
  • the drilling fluid can be reliably emitted from respective emission ports 15 , so that the function for cutting the earth can be stably carried out.
  • the substantial parts of the Swivel joint 34 of the coupled structure 7 are approximately stored in the reamer main body 8 , even if there is the earth and sand that is not pushed into the inner wall of the hole, it is possible to prevent these earth and sand from entering into the Swivel joint 34 .
  • the rod 3 when pushing the buried pipe 1 into the pilot hole 5 , the rod 3 is connected to the rod connection part 24 of the reamer 6 , this rod 3 is drawn from the pilot hole 5 , and in the reamer main body 8 , the side of the narrow diameter becomes a traveling direction.
  • the earth and sand flow to the reamer main body 8 from its small diameter (narrow diameter) side to the large diameter side, namely, they flow to the rear side, and this leads to prevent the earth and sand from entering in the side of the Swivel joint 34 of which substantial parts are approximately stored in the reamer main body 8 .
  • the damage of the Swivel joint 34 can be evaded, and the reamer main body 8 is smoothly rotated so as to stably carry out the diameter enlargement operation of this reamer 6 .
  • the Swivel joint 34 is approximately stored in the reamer main body 8 , it is possible to make a gap measurement between the buried pipe 1 and the reamer main body 8 smaller, flexibility of the reamer 6 to the buried pipe 1 can be improved, and retracting capability of the buried pipe 1 can be improved. Further, if the gap measurement between the buried pipe 1 and the reamer main body 8 can be made smaller, an extra drilling opening toward the earth (the reamer connection hole) can be made smaller, and thereby, the construction time can be shorten by that much and further, it is possible to evade increase of the retracting resistance.
  • the cover 74 for preventing intrusion of the earth and sand is disposed between the reamer main body 8 and the buried pipe 1 to be mounted on the reamer main body 8 , by evading the intrusion of the earth and sand between this reamer main body 8 and the buried pipe 1 , it is possible to evade increase of the retracting resistance of the buried pipe 1 due to the intrusion of the earth and sand into this reamer device. Thereby, the retracting operation of the buried pipe 1 is not carried out by the excess retracting force but it can be carried out lightly.
  • the damage to the coupled structure 7 due to the intrusion of the earth and sand can be prevented, and the diameter enlargement operation by the reamer 6 can be stably carried out. Furthermore, since the rotation side of the side of the reamer main body 8 and the non-rotation side of the side of the buried pipe 1 are sealed by the floating seal 57 in the Swivel joint 34 , it is possible to configure an earth and sand intrusion prevention mechanism that is excellent in reliability and durability for a long time. Therefore, it is possible to extend a maintenance interval.
  • the cover 74 for preventing intrusion of the earth and sand can prevent the earth and sand from intruding from the end portion of the side of the reamer main body 8 of the cover 74 for preventing intrusion of the earth and sand into the side of the coupled structure 1 , and since the gap 79 is provided between the end portion of the opposite side of the reamer main body 8 and the buried pipe 1 , it is possible to secure flexibility of the reamer 6 for the buried pipe 1 .
  • the earth and sand flow to the side of the buried pipe 1 of this reamer device, so that by the gap 79 between the cover 74 for preventing intrusion of the earth and sand and the buried pipe 1 , the earth and sand or the like entered in the cover 74 can be discharged.
  • the partition member 22 is disposed in the vicinity of the opening part at the side of the buried pipe 1 of the reamer main body 8 , the reamer main body 8 is reinforced by this partition member 22 . As a result, the reamer main body 8 is excellent in strength and the diameter enlargement operation of the pilot hole 5 can be stably carried out.
  • the partition member 22 is provided with the emission port 36 for emitting the drilling fluid entered in the hollow chamber 23 (a passage of the drilling fluid) of the reamer main body 8 to the side of the buried pipe 1 , it is possible to prevent the earth and sand from accumulating at the rear side of the reamer main body 8 by the drilling fluid that is emitted from this emission port 36 , and it is possible to evade increase of the retracting resistance of the buried pipe 1 by the intrusion of the earth and sand into this reamer device. Furthermore, by injecting rinse water from this emission port 36 and the emission port 15 after finishing the burying operation, the inside of this hollow chamber 23 can be cleaned.
  • the emission port 15 is configured by the nozzle member 17 to be screwed to the screw hole 16 that is formed on the reamer main body 8 , so that even if the clogging is generated in this emission port 15 , by detaching the nozzle member 17 , it is possible to easily remove the clogging.
  • the present invention is not limited to the above-described embodiments and various modifications are allowed in a scope of the present invention.
  • the reamer main body 8 is standardized, the cost can be reduced and the stock control becomes easy; however, a plurality of reamer main bodies 8 having different shapes is also available. In this case, the hole diameter and the number of the of emission ports 15 of the reamer main body 8 may be different.
  • the platy member 9 has no curing processing part 9 b .
  • the reamers 6 having different platy members 9 are used, however, when the reamer 6 uses the super hard chip 90 as shown in FIG. 7B , by changing this super hard chip 90 , various types of reamers 6 can be formed, so that the operator may bring the reamer 6 that is formed in this way to the scene.
  • the rod 3 is made to penetrate through the inclined surface and the rod 3 is made to project from the inclined surface. Therefore, on the burying operation, the penetration pit P 1 , the starting pit P 2 , and the attainment pit P 3 or the like may be omitted.
  • the drill driving device 2 and the drilling fluid feeder 4 are configured separately, however, these devices may be integrally configured.
US10/806,337 2003-03-26 2004-03-23 Pipe burying method Abandoned US20050034896A1 (en)

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JP2003086344A JP2004293142A (ja) 2003-03-26 2003-03-26 管埋設方法

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US20080286051A1 (en) * 2007-05-17 2008-11-20 Jody Duggan Method of and apparatus for pulling a pipe
US20080296066A1 (en) * 2007-06-04 2008-12-04 Putnam Samuel W Bore hole sleeve reaming apparatus and method
EP2447462A1 (de) * 2010-10-29 2012-05-02 T.I.C. Technology Innovation Consulting AG Verfahren zum unterirdischen Einbringen einer Rohrleitung
US20150176723A1 (en) * 2011-07-29 2015-06-25 Martin D. Cherrington Method and portable apparatus for thrusting a pipe into and out of an earthen formation
WO2015096894A1 (de) * 2013-12-23 2015-07-02 Herrenknecht Ag Verfahren und vorrichtung zum verlegen grabenlosen verlegen von rohrleitungen
US20160362936A1 (en) * 2014-05-13 2016-12-15 Hypersciences, Inc. Ram accelerator system with endcap
US9988844B2 (en) 2014-10-23 2018-06-05 Hypersciences, Inc. Ram accelerator system with rail tube
US10180030B2 (en) 2013-03-15 2019-01-15 Hypersciences, Inc. Ram accelerator system
US10329842B2 (en) 2015-11-13 2019-06-25 Hypersciences, Inc. System for generating a hole using projectiles
US20190229513A1 (en) * 2018-01-23 2019-07-25 Sterlite Technologies Limited Installation of pre-ducted optical fiber cable assembly
US10557308B2 (en) 2015-11-10 2020-02-11 Hypersciences, Inc. Projectile drilling system
US10590707B2 (en) 2016-09-12 2020-03-17 Hypersciences, Inc. Augmented drilling system
US10697242B2 (en) 2015-04-21 2020-06-30 Hypersciences, Inc. Ram accelerator system with baffles
US11624235B2 (en) 2020-08-24 2023-04-11 Hypersciences, Inc. Ram accelerator augmented drilling system
US11719047B2 (en) 2021-03-30 2023-08-08 Hypersciences, Inc. Projectile drilling system

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KR100836626B1 (ko) * 2007-10-09 2008-06-10 프로몰엔지니어링주식회사 피엠지공법 및 그를 위한 시공장치
KR100935439B1 (ko) * 2009-08-03 2010-01-06 프로몰엔지니어링주식회사 친환경적인 비개착 해저관로 매설공법 및 시스템
KR100967308B1 (ko) * 2009-12-01 2010-07-01 프로몰엔지니어링주식회사 해저관로의 케이블 캐리 방법
KR101193086B1 (ko) * 2012-02-28 2012-10-22 주식회사 디엔텍 풀링폴리셔를 이용한 해저관로 매설공법
CN110778323A (zh) * 2019-09-05 2020-02-11 青岛安装建设股份有限公司 埋地管道牵引穿越施工方法

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US7985037B2 (en) 2007-05-17 2011-07-26 Jody Duggan Method of and apparatus for pulling a pipe
US20080286051A1 (en) * 2007-05-17 2008-11-20 Jody Duggan Method of and apparatus for pulling a pipe
US20080296066A1 (en) * 2007-06-04 2008-12-04 Putnam Samuel W Bore hole sleeve reaming apparatus and method
US7699123B2 (en) * 2007-06-04 2010-04-20 Putnam Samuel W Bore hole sleeve reaming apparatus and method
EP2447462A1 (de) * 2010-10-29 2012-05-02 T.I.C. Technology Innovation Consulting AG Verfahren zum unterirdischen Einbringen einer Rohrleitung
WO2012056011A1 (de) * 2010-10-29 2012-05-03 T.I.C. Technology Innovation Consulting Ag Verfahren zum unterirdischen einbringen einer rohrleitung
US9534705B2 (en) * 2011-07-29 2017-01-03 Martin D. Cherrington Method and portable apparatus for thrusting a pipe into and out of an earthen formation
US20150176723A1 (en) * 2011-07-29 2015-06-25 Martin D. Cherrington Method and portable apparatus for thrusting a pipe into and out of an earthen formation
US10180030B2 (en) 2013-03-15 2019-01-15 Hypersciences, Inc. Ram accelerator system
US20170045156A1 (en) * 2013-12-23 2017-02-16 Herrenknecht Ag Method and device for trenchless pipe laying
WO2015096894A1 (de) * 2013-12-23 2015-07-02 Herrenknecht Ag Verfahren und vorrichtung zum verlegen grabenlosen verlegen von rohrleitungen
US10443761B2 (en) * 2013-12-23 2019-10-15 Herrenknecht Ag Method and device for trenchless pipe laying
US10344534B2 (en) * 2014-05-13 2019-07-09 Hypersciences, Inc. Ram accelerator system with endcap
US10822877B2 (en) 2014-05-13 2020-11-03 Hypersciences, Inc. Enhanced endcap ram accelerator system
US20160362936A1 (en) * 2014-05-13 2016-12-15 Hypersciences, Inc. Ram accelerator system with endcap
US9988844B2 (en) 2014-10-23 2018-06-05 Hypersciences, Inc. Ram accelerator system with rail tube
US10697242B2 (en) 2015-04-21 2020-06-30 Hypersciences, Inc. Ram accelerator system with baffles
US10557308B2 (en) 2015-11-10 2020-02-11 Hypersciences, Inc. Projectile drilling system
US10329842B2 (en) 2015-11-13 2019-06-25 Hypersciences, Inc. System for generating a hole using projectiles
US10590707B2 (en) 2016-09-12 2020-03-17 Hypersciences, Inc. Augmented drilling system
US20190229513A1 (en) * 2018-01-23 2019-07-25 Sterlite Technologies Limited Installation of pre-ducted optical fiber cable assembly
US11557890B2 (en) * 2018-01-23 2023-01-17 Sterlite Technologies Limited Installation of pre-ducted optical fiber cable assembly
US11624235B2 (en) 2020-08-24 2023-04-11 Hypersciences, Inc. Ram accelerator augmented drilling system
US11719047B2 (en) 2021-03-30 2023-08-08 Hypersciences, Inc. Projectile drilling system

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