JP6085484B2 - Pile driver - Google Patents

Description

  The present invention relates to a pile driving machine used in a foundation pile construction method.

  A conventional pile driver installs an auger machine on a lifting frame that can be raised and lowered along one side of a leader supported by a crawler crane, etc., and sets a steel pipe pile on a pile cap provided at the lower end of the auger machine, The steel pipe pile is rotated by an auger machine and embedded in the ground.

    While driving a steel pipe pile into the ground with such a pile driver, it encounters obstacles such as hard ground such as rock and gravel layers and boulders, making it difficult or impossible to drive further steel pipe piles. When this happens, the steel pipe pile is pulled out once, the drill rod is linked to a percussion drill machine installed in another device, and the percussion drill machine gives a striking force to the drill rod. Or after removing the obstacles and crushing or removing them, pull up the drill rod, move the other equipment with the percussion drill machine, return the pile driver to its original position, and Is penetrated again and driven to a predetermined depth.

  The above conventional pile driving machine is equipped with a percussion drill machine that crushes or removes hard strata and obstacles such as rocks, etc. when encountering hard strata such as rocks and boulders while embedding steel pipe piles. Other equipment was required, it took time to move the equipment, and the construction efficiency was very poor.

  In view of the above circumstances, the present invention provides a pile driving machine that does not require movement of the apparatus itself and can improve construction efficiency by providing an auger machine and a percussion drill machine in the same leader. It is an object.

  Means for solving the above problems will be described with reference numerals of the embodiments described later. The pile driver of the invention according to claim 1 is configured as shown in FIGS. A percussion drill machine 6 and a center hole type auger machine 7 positioned below the same are provided on a lifting frame 5 that can be raised and lowered along one side, and a pile that can be interlocked with the lower end of the auger machine 7. A cap 8 is provided. When the auger machine 7 is used, the steel pipe pile 9 is set on the pile cap 8 of the auger machine 7. When the percussion drill machine is used, the steel pipe pile 9 is removed from the pile cap 8 and the upper end of the drill rod 10 is augered. It is characterized in that the percussion drill machine 6 is interlocked and connected through the hollow portion of the machine 7.

  As illustrated in FIGS. 5 and 6, the pile driving machine of the invention according to claim 2 is provided with an auger machine 7 in a lifting frame 5 </ b> A that moves up and down along one side surface of the rotatable leader 1. A steel pipe pile 9 is set on a pile cap 8 provided to be interlocked with the lower end of the steel plate, and a percussion is provided on a lifting frame 5B that moves up and down along the other side surface that is separated from the one side surface of the leader 1 by a predetermined angle in the circumferential direction. A drill machine 6 is provided, and a drill rod 10 is interlocked and connected to the percussion drill machine 6, and the leader 1 is rotated around the axis to the use position according to the use of either the auger machine 7 or the percussion drill machine 6. It is characterized by doing so.

  As shown in FIG. 7, the pile driving machine of the invention according to claim 3 is provided with an elevating frame 20 on one side surface of a reader 1 that is supported by the base machine 2 and can be turned around a turntable 19 of the base machine 2. The auger machine 7 and the percussion drill machine 6 are provided side by side on the elevating frame 20 and the steel pipe pile 9 is set on the pile cap C provided at the lower end of the auger machine 7 so as to be interlocked with the auger machine 7. The drill rod 10 is interlocked and connected to the drill machine 6 so that the leader 1 is swung around the swivel base 19 of the base machine 2 to the use position in accordance with the use of either the auger machine 7 or the percussion drill machine 6. It is characterized by that.

  According to a fourth aspect of the present invention, in the pile driving machine according to any one of the first to third aspects, the percussion drill machine 6 is a rotary percussion drill machine.

  A fifth aspect of the present invention is the pile driving machine according to any one of the first to fourth aspects, wherein the drill rod 10 includes a screwed rod 10b or a screwless rod 10a.

  The effect of the invention by the above solution will be described with reference numerals of the embodiments described later. According to the pile driving machine of the invention according to claim 1, the lifting frame that can be moved up and down along one side surface of the reader 1. 5. Since the percussion drill machine 6 and the center hole type auger machine 7 located below the percussion drill machine 6 are provided coaxially, when the auger machine 7 is used, the pile cap C at the lower end of the auger machine 7 is used. It is only necessary to set the steel pipe pile 9 in the middle, and it is difficult to drive the steel pipe pile 9 by encountering an obstacle such as a rock formation, gravel layer or other hard formation Wb or a boulder or the like while the steel pipe pile 9 is driven by the auger machine 7. Alternatively, when it becomes impossible, the steel pipe pile 9 is removed from the pile cap C, and the upper end portion of the drill rod 10 is passed through the hollow portion of the auger machine 7 and linked to the percussion drill machine 6. Thus, the percussion drill machine 6 can be used immediately. After the hard formation Wb or the obstacle is crushed or removed by the percussion drill machine 6, when the auger machine 7 is used again, the drill rod 10 is pulled out and removed. Since the steel pipe pile 9 may be set on the pile cap C, the use of the auger machine 7 and the percussion drill machine 6 can be easily performed with a single base machine 2, and the construction efficiency can be improved.

  According to the second aspect of the invention, when the auger machine 7 is used, the leader 1 is rotated around the axis so that the auger machine 7 is positioned on the front side of the pile driving machine, and the pile cap C of the auger machine 7 is When the steel pipe pile 9 set in the ground is driven into the ground and encounters a hard formation Wb or an obstacle in the middle of the driving, and the embedding of the steel pipe pile 9 becomes difficult or impossible, After pulling the steel pipe pile 9 to the ground, the leader 1 is rotated by a predetermined angle from the auger machine front working position, the percussion drill machine 6 is positioned on the front side of the pile driving machine, and the drill rod linked to this percussion drill machine 6 The striking force is transmitted to 10, and the hard formation Wb or the obstacle is crushed or removed. When the auger machine 7 is used again, the drill rod 10 is lifted to the ground by the upward movement of the lifting frame 5B, and then the leader 1 is rotated so that the auger machine 7 is positioned on the front side of the hammer. . Thus, during pile driving, there is no need to remove the steel pipe pile 9 while the steel pipe pile 9 is set on the pile cap C of the auger machine 7, so when the use is switched from the auger machine 7 to the percussion drill machine 6, Replacement work is unnecessary, and construction efficiency can be improved.

  According to the third aspect of the present invention, when the auger machine 7 is used, the swivel base 19 of the base machine 2 is appropriately swiveled, and the reader 1 is swung around the swivel base 19 to the use position. Then, the steel pipe pile 9 suspended from the auger machine 7 is positioned at the pile driving position. At this position, the steel pipe pile 9 is driven into the ground. When the hard pile Wb or an obstacle is encountered in the middle of the driving and the steel pipe pile 9 is difficult or impossible to be driven, the steel pipe pile is moved by the upward movement of the lifting frame 20. 9 is pulled up to the ground, and the steel pipe pile 9 is separated from the auger machine 7, and then the swivel base 19 is swiveled appropriately, the leader 1 is swung around the swivel base 19, and the percussion drill machine 6 is moved to the pile driving position. The hard formation Wb and the obstacles are crushed or removed by the drill rod 10 that is located at the position and linked to the machine 6. In this way, according to the use of either the auger machine 7 or the percussion drill machine 6, the leader 1 is swung around the swivel base of the base machine 2 to the use position, so that the auger machine 7 and the percussion The use position of the drill machine 6 can be easily switched.

  Since the percussion drill machine 6 is a rotary percussion drill machine that transmits the rotational force to the drill rod 10 in addition to the striking force, the hard formation Wb and the obstacle are more effectively crushed or removed. can do.

  As described in claim 5, as the drill rod 10, a screwed rod 10b or a screwless rod 10a can be used.

In the side view of the pile driving machine which concerns on this invention, the state which uses the auger machine is shown. The side view of the pile driving machine which concerns on this invention shows the state which is using the percussion drill machine, (a) is the state which uses a screwless rod as a drill rod, (b) is with a screw as a drill rod The state where the rod is used is shown. (a)-(c) is explanatory drawing which shows the pile driving method by use of the pile driver. (a)-(c) is explanatory drawing which shows the pile driving method following (a)-(c) of FIG. It is a side view of the other pile driver based on this invention. (a) is a cross-sectional plan view when the auger machine is operated in front of the pile driving machine, and (b) is a cross-sectional plan view when the percussion drill machine is operated in front. It is a top view which shows roughly the other pile driver based on this invention.

  A preferred embodiment of the present invention will be described below with reference to the drawings. In FIG. 1 showing a pile driving machine according to the present invention, reference numeral 1 denotes a leader, which is a mast provided on a front end portion of a base machine 2 so as to be freely raised and lowered. 3 and is erected perpendicular to the horizontal plane. The leader 1 is equipped with a lifting frame 5 that moves up and down along a guide rail 4 provided over the entire length on the front side surface thereof. The lifting frame 5 includes a rotary percussion drill machine 6 and a machine 6. The center auger auger machine 7 located below is coaxially provided. The center hole type auger machine 7 is a machine in which a central portion passing through the axis of the auger machine 7 penetrates in the axial direction to form a hollow portion.

  The elevating frame 5 is driven up and down along the guide rail 4 by the elevating frame driving means 8. The elevating frame driving means 8 has sprockets 8a and 8b pivotally attached to the upper end and lower end of the reader 1, respectively, and a chain 8c is hung on both the sprockets 8a and 8b, and the lower sprocket 8b is used as a driving sprocket. This is linked to a motor with a reduction gear (not shown), and the lifting frame 5 is connected to a required portion of the chain 8c. The elevating frame driving means 8 is not limited to such a sprocket / chain mechanism, and a rack type or other known mechanism can be employed.

  The auger machine 7 is interlocked with the steel pipe pile 9 by setting the head of the steel pipe pile 9 to the pile cap C provided at the lower end of the auger machine 7, and the steel pipe pile 9 is driven to rotate forward and backward. The ground is drilled during forward rotation of 9, and is pulled out from the ground during reverse rotation. The auger machine 7 is a center hole type, and although not shown, a hollow hole is formed through the axis of the auger machine 7. A spiral blade 9 a is provided at the tip of the steel pipe pile 9.

  The rotary percussion drill machine 6 located above the auger machine 7 transmits striking force and rotational force as necessary to a drill rod 10 (see FIG. 2) linked to the lower end of the auger machine 7 so that the rock or gravel It crushes or removes obstacles such as hard strata such as layers or boulders. The rotary percussion drill machine 6 includes a swivel mechanism that supplies water or air to the hollow portion of the drill rod 10 although not shown in detail. The water or air supplied to the hollow portion of the drill rod 10 is discharged from the tip portion of the drill rod 10 as necessary.

  As shown in FIG. 2 (a), the drill rod 10 has only a sharp percussion head 11 at its tip, and is composed of a screwless rod 10a that is not provided with a screw over its entire length. As shown in (b), the screw 12 may be provided over the entire length, and may include a screwed rod 10b having a sharp percussion head 11 at the tip, and both are selectively used as necessary. .

  A method of burying the steel pipe pile 9 by using the pile driving machine configured as described above will be described with reference to FIGS. Note that the reader 1 is not shown in FIGS.

  FIG. 3 (a) shows that the auger machine 7 is first used to drive a steel pipe pile 9 into a relatively soft formation Wa such as a sand layer, while a hard formation Wb such as a bedrock or gravel layer or a boulder or the like. Indicates the state of encountering an obstacle. That is, when using the auger machine 7, as shown in the drawing, the head of the steel pipe pile 9 is set on the pile cap C at the lower end of the auger machine 7, and the steel pipe pile 9 is rotated forward by the auger machine 7. On the other hand, the elevating frame 5 is moved downward, and the steel pipe pile 9 is driven into the soft formation Wa while being rotationally pressed.

  When the tip of the steel pipe pile 9 hits the hard formation Wb or an obstacle during the driving of the steel pipe pile 9 and it becomes difficult or impossible to drive the steel pipe pile 9, the steel pipe pile 9 is driven by the reverse rotation of the auger machine 7 3B, the steel pipe pile 9 is pulled up to the ground by raising the elevating frame 5, and the steel pipe pile 9 is removed from the pile cap C and temporarily removed. Then, depending on the state of the hard formation Wb or the obstacle, either the screwless rod 10a or the screwed rod 10b is selected and prepared for connection to the rotary percussion drill machine 6.

  In this case, if the screwless rod 10a is selected as the drill rod 10, it is set in the rotary percussion drill machine 6 as shown in FIG. That is, the upper end portion of the screwless rod 10 a is interlocked with the rotary percussion drill machine 6 through a hollow portion (not shown) of the auger machine 7. Thus, the rotary percussion drill machine 6 transmits the striking force and the rotational force to the rod 10a, and the hard stratum Wb or the obstacle is crushed or removed by the striking force and the rotational force of the rod 10a.

  When the hard formation Wb or the obstacle is crushed or removed in this way, the lifting frame 5 is moved up to lift the rod 10a to the ground, and is removed from the rotary percussion drill machine 6, and again as shown in FIG. The pile 9 is set on the pile cap C, and the elevating frame 5 is lowered while the steel pipe pile 9 is normally rotated by the auger machine 7, and the steel pipe pile 9 is driven to a predetermined depth while being rotationally press-fitted into the lower soft formation Wa.

  When the steel pipe pile 9 is driven to a predetermined depth as described above and the tip reaches the support layer Wd, the pile cap C of the auger machine 7 is started from the head of the steel pipe pile 9 as shown in FIG. The auger machine 7 is pulled up by moving the elevating frame 5 along the leader 1 and the work of driving the steel pipe pile 9 is completed. Thereafter, the base machine 2 is moved to another location.

  The pile driving machine described with reference to FIGS. 1 to 4 includes a rotary percussion drill machine 6 and a center hole type auger machine 7 positioned below the lifting frame 5 that can be moved up and down along one side of the leader 1. Since the auger machine 7 is used, the steel pipe pile 9 can be set on the pile cap C at the lower end of the auger machine 7, and the steel pipe pile 9 is being driven by the auger machine 7. When a hard stratum Wb or an obstacle is encountered and it is difficult or impossible to drive the steel pipe pile 9, the steel pipe pile 9 is removed from the pile cap C, and the upper end of the drill rod 10 is placed in the hollow portion of the auger machine 7. The rotary percussion drill machine 6 can be used immediately by connecting to the rotary percussion drill machine 6 through the rotor. -After crushing or removing the hard formation Wb and obstacles with the percussion drill machine 6, when using the auger machine 7 again, the drill rod 10 should be pulled out and removed, and the steel pipe pile 9 should be set in the pile cap C. The auger machine 7 and the rotary percussion drill machine 6 can be easily used with a single base machine 2 and the construction efficiency can be improved.

  FIG. 5 shows another pile driving machine according to the present invention. This pile driving machine is provided with an auger machine 7 in an elevating frame 5 </ b> A that moves up and down along one side surface of the rotatable leader 1. A steel pipe pile 9 is set on a pile cap C provided so as to be interlocked with the lower end portion of the same, and an elevating frame 5B that moves up and down along the other side face that is 90 ° apart from the one side face of the same leader 1 in the circumferential direction. A rotary percussion drill machine 6 is provided, and a drill rod 10 is interlocked and connected to the rotary percussion drill machine 6, and the leader 1 is rotated to a use position in accordance with the use of either the auger machine 7 or the rotary percussion drill machine 6. I am doing so.

  The pile driving machine shown in FIG. 1 is the same, but the leader 1 of the pile driving machine shown in FIG. 5 is rotatable around the axis. That is, as shown in FIGS. 1 and 2, the reader 1 can be rotated around the axis by the upper bracket 13 and the lower bracket 14 of the movable frame 12 that can be moved up and down along the mast 3 of the base machine 2. It is supported and is driven to rotate at a required angle around the axis by a reader rotation driving means 15 provided on the lower bracket 14. Further, the movable frame 12 is driven up and down by a required stroke by a lift driving cylinder 16 provided in the mast 3, and the reader 1 is moved up and down by a required stroke by driving the movable frame 12 up and down. 1, 2, and 5, reference numeral 21 denotes a ring-shaped steady rest provided at the lower end on the front side of the reader 1, and the runout on the lower end side of the steel pipe pile 9 and the drill rod 10 to be inserted into the ring-shaped steady rest. To prevent.

  6A is a cross-sectional plan view of the auger machine 7 using the pile driving machine shown in FIG. 5 during the front work, and FIG. 6B is a cross-sectional plan view of the percussion drill machine 6 during the front work. That is, as can be seen from these drawings, one side surface of the reader 1 is provided with guide rails 17 and 17 along the entire length, and a lifting frame 5A is provided along the guide rails 17 and 17 so as to be movable up and down. An auger machine 7 is mounted on the lifting frame 5A. The elevating frame 5A is driven up and down along the guide rail 4 by the elevating frame driving means 8A. As in the pile driving machine shown in FIG. 1, the elevating frame driving means 8A has sprockets 8a and 8b pivotally attached to the upper end and lower end of the leader 1, and a chain 8c is hung between the sprockets 8a and 8b. At the same time, the lower sprocket 8b is used as a drive sprocket, which is linked to a motor with a speed reducer (not shown), and the lifting frame 5 is connected to a required portion of the chain 8c. In the pile driving machine shown in FIG. 5, the steel pipe pile 9 is always set on the pile cap C of the auger machine 7.

  Further, as shown in FIG. 6A, guide rails 18 and 18 are provided over the entire length on the other side surface of the reader 1 that is spaced 90 ° in the circumferential direction with respect to the one side surface. A lifting frame 5B is mounted so as to be movable up and down along with the rotary percussion drill machine 6 is mounted on the lifting frame 5B. The elevating frame 5B is driven up and down along the guide rails 18 and 18 by a wire hoisting type elevating frame driving means 8B schematically shown in FIG. A drill rod 10 (rod 10b with screw or rod 10a without screw) is linked to the rotary percussion drill machine 6.

  When the steel pipe pile 9 is driven using the auger machine 7, as shown in FIG. 6 (a), the leader 1 is appropriately rotated around the axis by the leader rotation driving means 15, and the auger machine 7 Is located on the front side of the pile driver. When the rotary percussion drill machine 6 is used to crush or remove the hard ground layer Wb or the obstacle while transmitting the striking force and, if necessary, the rotational force to the drill rod 10 (see FIG. 2), the leader 1 is rotated by 90 ° from the front working position of the auger machine shown in FIG. 6 (a) by the leader rotation driving means 15, so that the rotary percussion drill machine 6 is positioned on the front side of the pile driving machine. ).

  5 and 6 described above, when using the auger machine 7, the leader 1 is rotated around the core by the leader rotation driving means 15, and the auger machine 7 is moved to the front side of the pile driving machine. The steel pipe pile 9 set in the pile cap C of the auger machine 7 is driven into the ground, and a hard formation Wb or an obstacle is encountered in the middle of the driving, making it difficult or impossible to embed the steel pipe pile 9. When the steel frame pile 9 is lifted to the ground by the upward movement of the elevating frame 5A, the leader 1 is rotated 90 ° from the working position in front of the auger machine by the leader rotation driving means 15, and the rotary percussion drill machine 6 is piled. The drill rod 10 (screw 10b with screw or rod 10a without screw), which is located on the front side of the machine and linked to this machine 6, is rotated as necessary and rotated. And transmitting, to crush or remove the hard formations Wb or obstacles. When the auger machine 7 is used again, the drill rod 10 is lifted to the ground by the upward movement of the elevating frame 5B, and then the leader 1 is rotated to place the auger machine 7 on the front side of the hammer. .

  Thus, during pile driving, it is not necessary to remove the steel pipe pile 9 while the steel pipe pile 9 is set on the pile cap C of the auger machine 7, so the steel pipe pile 9 is removed when switching from the auger machine 7 to the rotary percussion drill machine 6.・ Replacement work is not required and construction efficiency can be improved.

  FIG. 7 schematically shows another pile driving machine according to the present invention in a plan view, in which a lifting frame 20 can be moved up and down on one side of a reader 1 that can be swung around a swivel 19 of a base machine 2. The lifting frame 20 is provided with an auger machine 7 and a rotary percussion drill machine 6 side by side, and a pile cap which is not shown in FIG. A steel pipe pile 9 is set in C, and a drill rod 10 (a rod 10b with a screw or a rod 10a without a screw) is interlocked and connected to a rotary percussion drill machine 6.

  Therefore, when the auger machine 7 is used in this pile driving machine, the swivel base 19 of the base machine 2 is swiveled as appropriate, and the leader 1 is shown in phantom lines from the solid line illustrated position in FIG. By turning to the position, the steel pipe pile 9 suspended and connected to the auger machine 7 is located at the pile driving position indicated by the phantom line in FIG. In this position, the steel pipe pile 9 is driven into the ground, and when the hard pile Wb or an obstacle is encountered in the middle of the driving, and the embedding of the steel pipe pile 9 becomes difficult or impossible, the steel pipe pile 9 is moved by the upward movement of the lifting frame 20. 9 is pulled up to the ground, and the steel pipe pile 9 is separated from the auger machine 7, and then the swivel base 19 is swiveled appropriately, the leader 1 is swung around the swivel base 19, and the rotary percussion drill machine 6 The hard stratum Wb or the obstacle can be crushed or removed by transmitting the striking force and, if necessary, the rotational force by the drill rod 10 which is located at the striking position and linked to the machine 6.

  The rotary percussion drill machine 6 of the embodiment described above transmits a striking force and a rotational force to the drill rod 10, but in the pile driving machine according to the present invention, instead of the rotary percussion drill machine 6, a drill is used. A percussion drill machine that transmits only the striking force to the rod 10 may be used.

DESCRIPTION OF SYMBOLS 1 Leader 2 Base machine 5 Elevating frame 5A Elevating frame 5B Elevating frame 6 Rotary percussion drill machine 7 Auger machine 9 Steel pipe pile C Pile cap 10 Drill rod 10a Screwless rod 10b Screwed rod

Claims (5)

  A percussion drill machine and a center hole type auger machine located below it are coaxially mounted on a lifting frame that can be raised and lowered along one side of the leader, and a pile cap that can be linked to this is installed at the lower end of the auger machine When using an auger machine, set the steel pipe pile to the pile cap of the auger machine.When using the percussion drill machine, remove the steel pipe pile from the pile cap and pass the upper end of the drill rod through the hollow part of the auger machine. Pile driver that is linked to the machine.   An auger machine is installed on the lifting frame that moves up and down along one side of the rotatable leader, and a steel pipe pile is set on a pile cap that can be interlocked with the lower end of the auger machine. A percussion drill machine is installed in the lifting frame that moves up and down along the other side separated by a predetermined angle in the circumferential direction, and a drill rod is linked to this percussion drill machine, depending on the use of either an auger machine or a percussion drill machine. A pile driver that rotates the leader around the axis to the working position.   An elevating frame is provided that is erected on the base machine and that moves up and down along one side of the leader that can be swiveled around the swivel of the base machine. An auger machine and a percussion drill machine are juxtaposed on the elevating frame. A steel pipe pile is set on a pile cap that can be linked to the lower end of the machine, a drill rod is linked to the percussion drill machine, and the leader is based on the use of either an auger machine or a percussion drill machine. A pile driver that swivels to the position of use around the machine swivel.   The pile driver according to any one of claims 1 to 3, wherein the percussion drill machine is a rotary percussion drill machine.   The pile roding machine according to any one of claims 1 to 4, wherein the drill rod is a screwed rod or a screwless rod.

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