JP5126853B2 - Slope pile construction method and slope pile construction equipment - Google Patents

Description

  The present invention relates to an oblique pile construction method and an oblique pile construction facility, and more particularly to an oblique pile construction method and an oblique pile construction facility suitable for a rotary press-fit steel pipe pile that is press-fitted into the ground to support an upper structure.

  Steel pipe piles may be constructed on the ground to support superstructures such as roads, railway viaducts, abutments and steel towers. The steel pipe pile is press-fitted into the ground while being rotated using a steel pipe pile rotary press-fitting device such as an all-swivel all-casing excavator. Usually, steel pipe piles are press-fitted at right angles to the ground. On the other hand, in patent document 1 and patent document 2, the technique of press-fitting into a ground is disclosed, rotating a steel pipe pile in the state which inclined the steel pipe pile with respect to the ground. The technique of patent document 1 and patent document 2 is a technique regarding the steel pipe pile for rotary press-in which has a helical blade | wing or a wing | blade in the surrounding side surface of a steel pipe pile especially.

JP 2003-166239 A (Patent No. 3737421) JP 2004-257044 A (Patent No. 4084777)

  By the way, a steel pipe pile for rotary press fitting (hereinafter also referred to as “pile”) is suspended from a crane or the like, and a steel pipe pile rotary press fitting apparatus (hereinafter referred to as “rotary press fitting device”) such as an all-swing all-casing excavator. )). When the pile is suspended by a crane or the like, the axial direction of the pile is perpendicular to the ground. Therefore, in order to build a pile in the rotary press-fitting device, it is necessary to keep the rotary press-fitting device in a horizontal state. Then, after the pile is built in the rotary press-fitting device, the rotary press-fitting device is tilted together with the pile to an angle necessary for press-fitting the pile.

  In the technique of Patent Document 1, in order to maintain the rotary press-fitting device in a horizontal state, the support member 8 (or the gantry 5b) is laid under the leg seat on one side of the rotary press-fitting device. And in the technique of patent document 1, it makes the state which lifted the one side of the rotary press-fit apparatus with which the pile was erected with the crane, and removes said support member 8 (or mount 5b). After that, the rotary press-fitting device was inclined with respect to the ground by installing one side of the rotary press-fitting device on the ground surface with a crane.

  Thus, in the construction method described above, it has been necessary to lift or suspend the rotary press-fitting device using a crane or the like in order to change the rotary press-fitting device from the horizontal state to the inclined state. However, there is a problem that the rotary press-fitting device is heavy and the lifting work with a crane is dangerous. In addition, the pedestal disclosed in Patent Document 1 has a problem that it is large in size and difficult for an operator to handle.

  Further, in the technique of Patent Document 2, a rotary press-fitting device is installed on a gantry having a telescopic leg, and the telescopic leg is adjusted to expand and contract, whereby the gantry is tilted and the rotary press-fitting device is tilted. . However, in this construction method, it is necessary to use a gantry having a telescopic leg, and the gantry having the telescopic leg is larger in size than the gantry disclosed in Patent Document 1 and is difficult to handle for an operator. There was a problem.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to tilt a horizontal steel pipe pile rotary press-fitting device in which a steel pipe pile for rotary press-fitting is built safely and easily. An object of the present invention is to provide a new and improved method for constructing a slant pile and a construction facility for a slant pile that can be shifted to a state.

  In order to solve the above-described problem, according to one aspect of the present invention, a step of installing two first mounts on which only one leg seat of a steel pipe pile rotary press-fitting device can be placed; The step of placing the steel pipe pile rotary press-fitting device in a horizontal state without placing the other leg seats of the steel pipe pile rotary press-fitting device one by one on the first frame And the step of installing the steel pipe pile for rotary press-fitting into the steel pipe pile rotary press-in device, and the steel pipe pile rotary press-in device connected to the leg seat with the lower part of the steel pipe pile for rotary press-fitting held by the steel pipe pile rotary press-in device. Adjusting the jack, tilting the steel pipe pile rotary press-in device and rotary press-fit steel pipe pile with respect to the ground, and driving the steel pipe pile rotary press-in device to press-fit into the ground while rotating the rotary press-fit steel pipe pile And a method for constructing a diagonal pile with steps is provided. That.

  You may further have the step which installs a stop member in the position corresponding to the other leg seat of the said steel pipe pile rotation press-fit apparatus.

  In the state where the lower part of the steel pipe pile for rotary press-fitting is gripped by the steel pipe pile rotary press-fitting device, the jack is adjusted to separate the leg seat from the ground surface, and between the leg seat and the ground surface separated from the ground surface. You may have further the step which installs a 2nd mount, and the step which mounts the leg seat spaced apart from the ground surface on the 2nd mount.

  Moreover, in order to solve the said subject, according to another viewpoint of this invention, the steel pipe pile for rotary press-fit is built in a horizontal state, and it connects with a leg seat in the state which hold | gripped the lower part of the steel pipe pile for rotary press-fit. The steel pipe pile rotary press-fitting device is adjusted, the steel pipe pile for rotary press-fitting is inclined with respect to the ground, and the steel pipe pile rotary press-fitting device is press-fitted into the ground while rotating the steel pipe pile for rotary press-fitting. When the pile rotary press-fitting device is installed in a horizontal state or an inclined state, the pile rotary press-fitting device has at least two first mounts on which only one leg seat of the steel pipe pile press-fitting device is placed. When installed in a state or inclined state, at least two first mounts are installed, and the other leg seats of the steel pipe pile rotary press-fitting device are installed without being placed on the first mount, and the steel pipe piles can penetrate Of inclined piles with a seat plate provided with various steel pipe pile insertion holes Bei is provided.

  The seat plate may be provided with a stop member at a position corresponding to another leg seat of the steel pipe pile rotary press-fitting device.

  When the jack is adjusted and the leg seat is separated from the seat plate with the lower part of the steel tube pile for rotary press fitting held by the steel pipe pile rotary press-fitting device, it is installed between the leg seat and the seat plate separated from the seat plate. It may further include a second frame on which a leg seat separated from a rear seat plate installed between the leg seat and the seat plate is placed.

  As described above, according to the present invention, the horizontal steel pipe pile rotary press-fitting device in which the rotary press-fit steel pipe pile is built can be safely and easily shifted to the inclined state.

It is a top view which shows the seat plate used for the steel pipe pile rotation press-fitting method which concerns on one Embodiment of this invention. It is a side view which shows the seat plate used for the steel pipe pile rotation press-fitting method concerning the embodiment. It is a top view which shows the seat plate and mount used for the steel pipe pile rotation press-fitting method according to the embodiment. It is a side view which shows the seat plate and mount used for the steel pipe pile rotation press-fitting method according to the embodiment. It is the top view (A) and side view (B) which show the mount installed on the board member of a seat board. It is a side view which shows the steel pipe pile rotary press-in apparatus installed on the board member of a seat board. It is a side view which shows the crane used for the steel pipe pile rotary press-in method which concerns on the same embodiment, the steel pipe pile rotary press-in apparatus, and the steel pipe pile for rotary press-in. It is a side view which shows the crane used for the steel pipe pile rotary press-in method which concerns on the same embodiment, the steel pipe pile rotary press-in apparatus, and the steel pipe pile for rotary press-in. It is a side view showing a steel pipe pile rotary press-fitting device and a steel pipe pile for rotary press-fitting. It is a side view showing a steel pipe pile rotary press-fitting device and a steel pipe pile for rotary press-fitting. It is a side view which shows the crane used for the steel pipe pile rotary press-in method which concerns on the same embodiment, the steel pipe pile rotary press-in apparatus, and the steel pipe pile for rotary press-in. It is a side view which shows the crane used for the steel pipe pile rotary press-in method which concerns on the same embodiment, the steel pipe pile rotary press-in apparatus, and the steel pipe pile for rotary press-in. It is a side view which shows the crane used for the steel pipe pile rotary press-in method which concerns on the same embodiment, the steel pipe pile rotary press-in apparatus, and the steel pipe pile for rotary press-in. It is a side view which shows the crane used for the steel pipe pile rotary press-in method which concerns on the same embodiment, the steel pipe pile rotary press-in apparatus, and the steel pipe pile for rotary press-in. It is a longitudinal cross-sectional view which shows the steel pipe pile rotary press-in apparatus used for the steel pipe pile rotary press-in method which concerns on the same embodiment. It is a side view which shows the leg seat vicinity of a steel pipe pile rotary press-fit apparatus. It is a side view which shows the steel pipe pile rotary press-in apparatus installed on the board member of a seat board. It is a side view which shows the steel pipe pile rotary press-in apparatus installed on the board member of a seat board. It is the top view (A) and side view (B) which show the circular mount installed on the board member of a seat board.

  Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

(Configuration of steel pipe pile rotary press-fitting device 2)
First, with reference to FIG. 15, the structure of the steel pipe pile rotary press-in apparatus (all-turn all casing excavator) 2 used for the steel pipe pile rotary press-in method which concerns on one Embodiment of this invention is demonstrated. FIG. 15: is a longitudinal cross-sectional view which shows the steel pipe pile rotary press-in apparatus 2 used for the steel pipe pile rotary press-in method which concerns on this embodiment.

  The steel pipe pile rotary press-fitting device 2 is installed in a horizontal state or an inclined state with respect to the ground surface. The steel pipe pile rotary press-fitting device 2 can hold the rotary press-fit steel pipe pile 1 and press-fit the rotary press-fit steel pipe pile 1 into the ground while rotating the rotary press-fit steel pipe pile 1. For example, as shown in FIG. 7, the rotary press-fit steel pipe pile 1 is a steel pipe pile provided with a steel pipe portion 47 and a spiral blade 14 (or a spiral blade) at a tip which becomes a lower portion when the ground is pressed.

  In the steel pipe pile rotary press-fitting device 2, cylinders of an angle adjusting jack 34 such as a hydraulic type having leg seats 25 at the lower part are fixed to four corners of a rectangular annular base frame 33. A leg seat 25 is attached to the tip of the movable piston 36 of the angle adjusting jack 34 via a ball joint 19.

  On the base frame 33, a plurality of (four) lifting jacks 38 for raising and lowering the lifting frame 37 are erected. The raising / lowering jack 38 is comprised so that the steel pipe pile 1 for rotary press-fit can be press-fitted in the ground by shortening the length of the raising / lowering jack 38. A chuck collar elevating jack 39 is provided on the upper part of the elevating frame 37.

  Further, a bearing 40 is provided inside the lower part of the elevating frame 37, and a rotating body 42 having an inner peripheral tapered surface 41 whose diameter is enlarged upward is provided via the bearing 40. An annular external tooth 43 is provided on the outer periphery of the rotating body 42, and the external tooth 43 meshes with a driving gear 46 of a rotating body driving hydraulic motor 44 fixed to the lifting frame 37 via an intermediate gear 62. .

  A chuck collar 27 that grips and rotates the steel pipe portion 47 of the rotary press-fit steel pipe pile 1 is provided inside the rotating body 42. A collar support block 48 is fixed to the chuck collar 27 with bolts 48a. On the outer surface of the collar support block 48, an outer peripheral tapered surface 49 whose upper diameter is enlarged is formed in order to give the collar support block 48 a wedge function. The wedge mechanism 50 is configured by bringing the outer peripheral tapered surface 49 into slidable contact with the inner peripheral tapered surface 41 whose upper portion of the rotating body 42 has an enlarged diameter.

  As shown in FIG. 15, the chuck collar 27 is formed with concave grooves 51 having the same pitch as the spiral blades 14 of the steel pipe pile 1 for rotary press-fitting. And from the upper side of the steel pipe pile rotary press-in device 2, the rotary press-fit steel pipe pile 1 whose axial direction is perpendicular to the ground is suspended, the spiral blade 14 is moved along the concave groove 51, and the rotary press-fit steel pipe pile 1 is placed. Screw in while rotating. As a result, the spiral blade 14 is passed through the portion of the chuck collar 27 and then rotated by the pile gripping diameter adjusting jig 52 at the tip of the chuck collar 27 and the high friction material provided in the pile gripping diameter adjusting jig 52. The press-fit steel pipe pile 1 is pressed and held. The steel pipe pile rotary press-fitting device 2 then press-fits the rotary press-fit steel pipe pile 1 into the ground while pressing and gripping the rotary press-fit steel pipe pile 1.

Next, the detailed part of the steel pipe pile rotary press-fitting device 2 will be described.
A plurality of (for example, eight) chuck collars 27 are arranged at equal intervals in the circumferential direction. The chuck collar 27 includes a chuck main body 53 and a chuck bracket 55.

  The chuck body 53 has a vertically long box-shaped cross section that is long in the vertical direction. The chuck bracket portion 55 has a box-shaped cross section composed of upper and lower plates and both side plates, and is fixed to the front plate 54 of the chuck main body 53. The chuck bracket portion 55 is provided in multiple stages in the vertical direction with a predetermined gap while shifting the position in the vertical direction for each chuck collar 27. The entire gaps of the eight chuck collars 27 provided at equal intervals in the circumferential direction are continuous, so that the concave grooves 51 having the same pitch as the spiral blades 14 of the rotary press-fit steel pipe pile 1 are formed.

  The rotational reaction force of the steel pipe pile rotary press-fitting device 2 is transmitted to the crane 6 via the reaction force transmission member 30 (see FIGS. 11 to 14) even in the inclined state. Moreover, the inclination angle of the steel pipe pile rotary press-fitting device 2 can be adjusted as appropriate by adjusting the amount of expansion / contraction of the angle adjusting jacks 34 arranged at the four corners of the steel pipe pile rotary press-fitting device 2.

  Further, as shown in FIG. 16, the leg seat 25 is connected via a ball joint 19 having a substantially spherical portion at the tip of the movable piston 36 of the angle adjusting jack 34 and a hemispherical receiving portion on the receiving seat side. It is attached. FIG. 16 is a side view showing the vicinity of the leg seat 25 of the steel pipe pile rotary press-fitting device 2. FIG. 16A shows the vicinity of the leg seat 25 when the steel pipe pile rotary press-fitting device 2 is in a horizontal state, and FIG. 16B shows the leg seat 25 when the steel pipe pile rotary press-fitting device 2 is in an inclined state. Indicates the neighborhood. Since the steel pipe pile rotary press-fitting device 2 has the above-described structure, the leg seat 25 can be stably placed on a plurality of mounts 56 (first mounts) having different heights. If the steel pipe pile rotary press-fitting device 2 is within the movable range of the ball joint 19, the leg seat 25 is in a horizontal state even in an inclined state, and is stably installed.

  Moreover, after constructing the first steel pipe pile 1 for rotary press fitting, the lower part of the new steel pipe is fixed to the upper end of the steel pipe pile 1 for rotary press fitting by welding or the like, and the integrated steel pipe pile is rotary press-fitted. The steel pipe pile rotary press-fitting device 2 can construct a steel pipe pile having a predetermined length.

  After the rotary press-fitting steel pipe pile 1 is rotary press-fitted to a predetermined depth, the steel pipe pile rotary press-fitting device 2 can be returned from the inclined state to the horizontal state by a procedure reverse to the above-described procedure. At this time, since the angle adjustment jack 34 is used without using the crane 6 or the like, a high-risk heavy object hanging work becomes unnecessary and work safety can be ensured. Then, by moving the steel pipe pile rotary press-fitting device 2 and the seat plate 4 to new construction locations, the steel pipe pile rotary press-fitting device 2 moves the rotary press-fit steel pipe pile 1 at the new construction location by the same procedure as described above. Rotary press-fitting is possible.

(Steel pipe pile rotary press-in method)
Next, the steel pipe pile rotation press-fitting method according to the present embodiment will be described.
The steel pipe pile rotary press-fitting method of the present embodiment is a method in which the steel pipe pile rotary press-fitting device 2 presses the rotary press-fit steel pipe pile 1 into the ground. In this embodiment, the mount 56 corresponding to each leg seat 25 of the steel pipe pile rotary press-fitting device 2 is installed on the seat plate 4. Next, the steel pipe pile rotary press-fitting device 2 is installed in a horizontal state on the seat plate 4 and the gantry 56, and the steel pipe pile 1 for rotary press-fitting is built in the steel pipe pile rotary press-fitting device 2.

  The steel pipe pile rotary press-fitting device 2 is installed in an inclined state by the installation height and angle adjusting jack 34 of the steel pipe pile rotary press-fitting device 2 generated by the gantry 56. At this time, since the steel pipe pile rotary press-fitting device 2 can be changed from the horizontal state to the inclined state without lifting the steel pipe pile rotary press-fitting device 2 by the crane 6 or the like, the operation is safe. After that, while the steel pipe pile rotary press-fitting device 2 is maintained in an inclined state, the steel pipe pile 1 for rotary press-fitting is pressed into the ground, thereby constructing a slant pile inclined with respect to the vertical direction. The outline of the steel pipe pile rotation press-fitting method of the present embodiment is as described above.

  First, the seat plate 4 and the mount 56 used in the steel pipe pile rotation press-fitting method according to the present embodiment will be described.

First, the seat plate 4 will be described with reference to FIGS. 1 and 2.
FIG. 1 is a plan view showing a seat plate 4 used in the steel pipe pile rotary press-fitting method according to the present embodiment. FIG. 2 is a side view showing the seat plate 4 used in the steel pipe pile rotary press-fitting method according to the present embodiment. 2A is a view of the seat plate 4 shown in FIG. 1 as viewed from the side, and FIG. 2B is a view of the seat plate 4 as viewed from a direction orthogonal to the direction seen in FIG. It is.

  The seat plate 4 includes a plate member 13 and a stop member 24. The plate member 13 is a plate-like member made of, for example, steel having a width that allows the entire steel pipe pile rotary press-fitting device 2 to be installed. An opening-shaped steel pipe pile insertion hole 9 is formed at a substantially central portion of the plate member 13. The steel pipe pile insertion hole 9 has a larger diameter than the rotary press-fit steel pipe pile 1 that is press-fitted into the ground, and the rotary press-fit steel pipe pile 1 penetrates the steel pipe pile insertion hole 9 during press-fitting.

  The stop member 24 is, for example, a steel member, and is fixed to the plate member 13 by welding. The stop member 24 is provided corresponding to the position of the leg seat 25 of the steel pipe pile rotary press-fitting device 2 installed on the seat plate 4. For example, when the steel pipe pile rotary press-fitting device 2 having four leg seats 25 is used, stop members 24 are provided at four locations on the plate member 13. The stop member 24 has a shape having a surface that fits the outer peripheral surface of the leg seat 25 or the gantry 56, and has a shape obtained by cutting a part of a circle when viewed from the top as shown in FIG. 1, for example.

  The stop member 24 can prevent displacement of the steel pipe pile rotary press-fitting device 2 and the mount 56 placed on the seat plate 4. Moreover, the stop member 24 can determine the installation position of the steel pipe pile rotary press-fitting device 2, and can position the press-fit position of the steel pipe pile 1 for rotary press-fitting.

Next, the gantry 56 will be described with reference to FIGS.
FIG. 3 is a plan view showing the seat plate 4 and the gantry 56 used in the steel pipe pile rotary press-fitting method according to the present embodiment. FIG. 4 is a side view showing the seat plate 4 and the gantry 56 used in the steel pipe pile rotary press-fitting method according to the present embodiment. 4A is a view of the seat plate 4 and the gantry 56 shown in FIG. 3 as viewed from the side, and FIG. 4B is from a direction orthogonal to the direction seen in FIG. FIG. FIG. 5 is a plan view (A) and a side view (B) showing the gantry 56 installed on the plate member 13 of the seat plate 4. FIG. 5A is an enlarged view of the vicinity of the gantry 56 in FIG.

  The gantry 56 has a size capable of mounting one leg seat 25 of the steel pipe pile rotary press-fitting device 2. The gantry 56 has a height of, for example, about 30 cm, and is installed at two locations of the stopper member 24 of the seat plate 4 so that the outer periphery of the gantry 56 contacts the inner surface of the stopper member 24. The steel pipe pile rotary press-fitting device 2 can be installed in an inclined state by placing the leg seats 25 of the steel pipe pile rotary press-fitting device 2 one by one on each of the two mounts 56 installed on the seat plate 4. .

  The gantry 56 includes, for example, a stop member 57, a lower plate 58, a body portion 59, an upper plate 61, and the like. The gantry 56 is provided with a lower plate 58 and an upper plate 61 at both ends of a cylindrical body portion 59, for example. The lower plate 58 and the upper plate 61 have a disk shape.

  The stop member 57 has a shape protruding upward from the upper plate 61 of the gantry 56 when installed on the seat plate 4. A lower portion of the stop member 57 is connected to the body portion 59 of the gantry 56. The stop member 57 can prevent displacement of the steel pipe pile rotary press-fitting device 2 placed on the gantry 56. Moreover, the stop member 57 can determine the installation position of the steel pipe pile rotary press-fitting device 2, and can position the press-fit position of the steel pipe pile 1 for rotary press-fitting.

  The gantry 56 is not limited to the shape shown in FIG. 5 described above. For example, the cylindrical shape which has the same diameter from the lower surface which contacts the seat board 4 to the upper surface in which the steel pipe pile rotary press-fit apparatus 2 is mounted may be sufficient.

  Next, the steel pipe pile rotation press-fitting method according to the present embodiment will be described in detail in order.

First, the seat plate 4 shown in FIGS. 1 and 2 is installed on the ground surface.
A stop member 24 is provided on the seat plate 4, and the installation position of the steel pipe pile rotary press-fitting device 2 can be defined. Therefore, when the seat plate 4 is installed, the seat plate 4 is installed on the ground surface in consideration of the position to press-fit the rotary press-fit steel pipe pile 1 and the direction of press-fitting.

  Next, as shown in FIGS. 3 to 5, two mounts 56 are installed on the stopper member 24 of the seat plate 4. Since the gantry 56 is relatively small in size and light in weight, it can be transported and installed by an operator. In the example shown in FIGS. 3 and 4, the gantry 56 has been installed at two places in the short direction of the seat plate 4. However, the present invention is not limited to this example, and the gantry 56 may be installed at two places in the longitudinal direction.

After that, as shown in FIG. 6, the steel pipe pile rotary press-fitting device 2 is placed on the seat plate 4 and the mount 56 by a crane 6 such as a crawler crane. FIG. 6 is a side view showing the steel pipe pile rotary press-fitting device 2 installed on the plate member 13 of the seat plate 4. 6A is a view of the seat plate 4, the gantry 56, and the steel pipe pile rotary press-fitting device 2 as viewed from the side, and FIG. 6B is orthogonal to the direction seen in FIG. 6A. It is the figure seen from the direction to do.
In FIG. 6, the stopper member 24 is omitted and indicated by a broken line (the same applies to FIGS. 9 and 17 to 19).

  The two leg seats 25 of the steel pipe pile rotary press-fitting device 2 are directly placed on the seat plate 4, and the other two leg seats 25 are placed on the mount 56. And the position of the leg seat 25 is adjusted with the jack 34 for angle adjustment so that the steel pipe pile rotation press-fit apparatus 2 may be in a horizontal state. By setting the steel pipe pile rotary press-fitting device 2 in a horizontal state, the rotary press-fit steel pipe pile 1 suspended in the vertical state can be smoothly built by the crane 6.

  Next, as shown in FIG. 7, the rotary press-fit steel pipe pile 1 is suspended by a crane 6 via a wire, and the rotary press-fit steel pipe pile 1 is moved above the steel pipe pile rotary press-fitting device 2. FIG. 7 is a side view showing the crane 6, the steel pipe pile rotary press-in device 2, and the steel pipe pile 1 for rotary press-in used in the steel pipe pile rotary press-in method according to the present embodiment.

  Then, the rotary press-fit steel pipe pile 1 is lowered toward the steel pipe pile rotary press-fitting device 2 by the crane 6 and the spiral collar 14 of the rotary press-fit steel pipe pile 1 is rotated, as shown in FIG. Let the part pass. Then, as shown in FIG. 8, the rotary press-fit steel pipe pile 1 is pressed and held by the pile holding diameter adjusting jig 52 at the tip of the chuck collar 27 and the high friction material provided in the pile holding diameter adjusting jig 52. FIG. 8 is a side view showing the crane 6, the steel pipe pile rotary press-in device 2, and the steel pipe pile 1 for rotary press-in used in the steel pipe pile rotary press-in method according to the present embodiment.

  Thereafter, in the state where the steel pipe pile 1 for rotary press-fitting is installed, by adjusting the expansion / contraction amount of the jack 34 for angle adjustment of the steel pipe pile rotary press-fitting device 2, as shown in FIGS. The press-fitting device 2 is tilted. FIG. 9 is a side view showing the steel pipe pile rotary press-fitting device 2 and the rotary press-fit steel pipe pile 1. FIG. 10 is a side view showing the steel pipe pile rotary press-fitting device 2 and the rotary press-fit steel pipe pile 1. FIG. 10 is a view seen from a direction orthogonal to the direction seen in FIG.

  In the example shown in FIG.9 and FIG.10, compared with the horizontal steel pipe pile rotary press-fitting device 2 shown in FIG. The rotary press-fitting device 2 is inclined. At the same time, the angle adjusting jack 34 on the side directly placed on the seat plate 4 may be shortened so that the inclination angle becomes steeper with respect to the ground surface. The inclination angle of the steel pipe pile rotary press-fitting device 2 is adjusted according to the press-fit angle of the rotary press-fit steel pipe pile 1 to be press-fitted. At this time, when the steel pipe pile rotary press-fitting device 2 is changed from a horizontal state to an inclined state, it is not necessary to lift the steel pipe pile rotary press-fitting device 2 with a crane or the like. Therefore, the horizontal steel pipe pile rotary press-fitting device 2 in which the rotary press-fit steel pipe pile 1 is built can be safely and easily shifted to the inclined state.

  Next, as shown in FIG. 11, one end of the reaction force transmission member 30 is connected to the steel pipe pile rotary press-fitting device 2, and the other end of the reaction force transmission member 30 is connected to the vehicle body 32 of the crane 6. FIG. 11 is a side view showing the crane 6, the steel pipe pile rotary press-in device 2, and the steel pipe pile 1 for rotary press-in used in the steel pipe pile rotary press-in method according to the present embodiment.

  The crane 6 is heavy and has a large frictional force with the ground 3. Therefore, the crane 6 can resist the rotational reaction force generated when the steel pipe pile rotary press-fitting device 2 rotationally presses the rotary press-fit steel pipe pile 1 through the reaction force transmission member 30.

  Then, the steel pipe pile rotary press-fitting device 2 is driven to rotate, and the rotary press-fit steel pipe pile 1 is rotary press-fitted into the ground 3 while applying a load to the rotary press-fit steel pipe pile 1. As a result, as shown in FIGS. 12 and 13, the rotary press-fit steel pipe pile 1 can be pressed into the ground 3 gradually from the state shown in FIG. 11. FIG.12 and FIG.13 is a side view which shows the crane 6, the steel pipe pile rotary press-in apparatus 2, and the steel pipe pile 1 for rotary press-in used for the steel pipe pile rotary press-in method which concerns on this embodiment.

  Although not shown, after press-fitting the rotary press-fit steel pipe pile 1 to a predetermined depth, a new steel pipe having substantially the same diameter as the rotary press-fit steel pipe pile 1 is welded to the upper end of the rotary press-fit steel pipe pile 1 by welding or the like. Connecting. Thereafter, the steel pipe pile 1 for rotary press-fitting and the steel pipe are further rotary press-fitted, and the connection of the new steel pipe and the rotary press-fitting are repeated until a predetermined depth is reached, whereby a diagonal pile having a desired length can be obtained.

  Further, as shown in FIG. 14, when the rotary press-fit steel pipe pile 1 press-fitted into the ground 3 is pulled out, the pull-out force is applied while the rotary press-fit steel pipe pile 1 is reversely rotated by the steel pipe pile rotary press-in device 2. . FIG. 14 is a side view showing the crane 6, the steel pipe pile rotary press-in device 2, and the steel pipe pile 1 for rotary press-in used in the steel pipe pile rotary press-in method according to the present embodiment. In this way, the rotary press-fit steel pipe pile 1 can be easily pulled out by applying a pull-out force while rotating the rotary press-fit steel pipe pile 1 in the reverse direction. In addition, even when pulling out a pile such as a temporary structure buried in the ground, the pile can be easily pulled out by applying a pulling force while rotating the pile with the steel pipe pile rotary press-fitting device 2. It can be lifted by the crane 6.

  Next, with reference to FIGS. 17-19, methods other than the method mentioned above when shifting the steel pipe pile rotary press-fitting device 2 from a horizontal state to an inclined state will be described.

  FIG. 17 is a side view showing the steel pipe pile rotary press-fitting device 2 installed on the plate member 13 of the seat plate 4. FIG. 17A is a view of the seat plate 4, the gantry 56, the circular gantry 60 (second gantry), and the steel pipe pile rotary press-fitting device 2 as viewed from the side, and FIG. It is the figure seen from the direction orthogonal to the direction seen in A). FIG. 18 is a side view showing the steel pipe pile rotary press-fitting device 2 installed on the plate member 13 of the seat plate 4. 18A is a view of the seat plate 4, the gantry 56, the circular pedestal 60, and the steel pipe pile rotary press-fitting device 2 as viewed from the side, and FIG. 18B is the direction viewed in FIG. 18A. It is the figure seen from the direction orthogonal to. FIG. 19 is a plan view (A) and a side view (B) showing the circular mount 60 installed on the plate member 13 of the seat plate 4.

  FIG. 17 shows a state before the circular mount 60 is installed. FIG. 18 shows a state after the circular mount 60 is installed.

  As described above, after the two leg seats 25 of the steel pipe pile rotary press-fitting device 2 are placed on the seat plate 4 and the remaining two leg seats 25 are installed on the mount 56, the expansion / contraction amount of the angle adjusting jack 34 is adjusted. It is sometimes impossible to incline the steel pipe pile rotary press-fitting device 2 to a desired angle only by doing. In that case, for example, the tilt angle may be adjusted using a circular mount 60 shown in FIG.

  The circular mount 60 has, for example, a disk shape with a height of about 6 cm. The circular pedestal 60 is installed at two locations of the stop member 24 of the seat plate 4 so that the outer periphery of the circular pedestal 60 contacts the inner surface of the stop member 24. It is possible to install the steel pipe pile rotary press-fitting device 2 in an inclined state by placing the leg seats 25 of the steel pipe pile rotary press-fitting device 2 one by one on each of the two circular mounts 60 installed on the seat plate 4. it can.

Hereinafter, the installation method of the circular mount 60 will be described.
First, as shown in FIG. 17, one of the two leg seats 25 installed directly on the seat plate 4 is floated from the seat plate 4 using the angle adjusting jack 34. At this time, the steel pipe pile rotary press-fitting device 2 is in a self-supporting state with the three leg seats 25. And the circular mount 60 is installed between the seat board 4 and the leg seat 25 of the floating state. Thereafter, as shown in FIG. 18, the suspended leg seat 25 is placed on the circular frame 60.

  Next, although not shown, the remaining leg seats 25 installed directly on the seat plate 4 are lifted from the seat plate 4 using the angle adjusting jacks 34 as before. At this time, the steel pipe pile rotary press-fitting device 2 is in a self-supporting state with the three leg seats 25. And the circular mount 60 is installed between the seat board 4 and the leg seat 25 of the floating state. Thereafter, the suspended leg seat 25 is placed on the circular frame 60. As a result, the two leg seats 25 are placed on the circular mount 60, and the other two leg seats 25 are placed on the mount 56.

  By adjusting the inclination angle of the steel pipe pile rotary press-fitting device 2 using the stand 56 and the circular mount 60 in addition to the case where the inclination angle of the steel pipe pile rotary press-fitting device 2 is adjusted using only the stand 56, The steel pipe pile rotary press-fitting device 2 can be tilted more freely at a desired tilt angle.

  As mentioned above, according to this embodiment, the base for inclining the steel pipe pile rotary press-fitting apparatus 2 can be made into the simple mount frame 56, the circular mount frame 60, etc. FIG. As a result, for example, a relatively large pedestal as shown in Patent Document 1 and Patent Document 2 is not required, and the installation preparation of the gantry 56 and the circular gantry 60 is simple. Also, the installation method is simple and the size is small, so that the positioning accuracy can be improved.

  In addition, when the steel pipe pile rotary press-fitting device 2 is shifted from the horizontal state to the inclined state, the angle adjustment jack 34 is used, and therefore, unlike the Patent Document 1, a crane is unnecessary. As a result, it is not necessary to suspend heavy objects with high risk, and work safety can be ensured.

  Furthermore, the steel pipe pile rotary press-fitting device 2 can be adjusted to various inclination angles by preparing several types of mounts having an arbitrary height.

  Further, the seat plate 4 used in the present embodiment is provided with the stop member 24, but is not limited to the case where the inclined pile is constructed using the steel pipe pile rotary press-fitting device 2 in an inclined state, and the steel pipe pile rotation It can also be used when constructing a direct pile using the press-fitting device 2 in a horizontal state. Therefore, in this embodiment, since only a stand is prepared, no special equipment or the like is required, so that the setup change between the straight pile and the inclined pile becomes easy.

  And since a complicated operation | work becomes unnecessary, since a construction cycle efficiency improves, a construction cost and work time can be reduced.

  The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field to which the present invention pertains can come up with various changes or modifications within the scope of the technical idea described in the claims. Of course, it is understood that these also belong to the technical scope of the present invention.

  For example, in the above embodiment, the gantry 56 and the circular gantry 60 are circular when viewed from above, but the present invention is not limited to this example. If the leg seat 25 of the steel pipe pile rotary press-fitting device 2 can be installed and the steel pipe pile rotary press-fitting device 2 can be stably placed, the gantry may have other shapes. For example, the shape when viewed from above may be a polygonal shape such as a square shape. At this time, the shape of the stopper member provided on the seat plate 4 may be a shape other than the shape of the stopper member 24 described above so as to conform to the shape of the gantry. Further, the heights of the gantry 56 and the circular gantry 60 are not limited to the values described above, and may be other values.

  Moreover, although the said embodiment demonstrated the case where the stop member 24 was provided in the seat plate 4, and the stop member 57 was provided in the mount frame 56, this invention is not limited to this example. For example, even when the stop member 24 is not provided on the seat plate 4 or when the stop member 57 is not provided on the mount 56, the above-described steel pipe pile rotary press-fitting method can be performed. In this case, there is a possibility that the steel pipe pile rotary press-fitting device 2 is likely to be displaced as compared with the case where the stop member 24 and the stop member 57 are provided. It can be prevented by connecting the crane 6 and the steel pipe pile rotary press-fitting device 2 with the reaction force transmission member 30 as described above.

  The present invention can be applied to a construction method of a diagonal pile, and in particular, can be applied to a steel pipe pile for rotary press-fitting that is press-fitted into the ground in order to support an upper structure.

DESCRIPTION OF SYMBOLS 1 Steel pipe pile for rotary press-in 2 Steel pipe pile rotary press-in apparatus 3 Ground 4 Seat plate 6 Crane 9 Steel pipe pile insertion hole 13 Plate member 14 Spiral wing 16 Diagonal pile 19 Ball joint 24 Stopping member 25 Leg seat 27 Chuck collar 30 Reaction force transmission member 32 Car body 33 Base frame 34 Angle adjustment jack 36 Movable piston 37 Elevating frame 38 Elevating jack 39 Chuck collar elevating jack 40 Bearing 41 Inner peripheral taper surface 42 Rotating body 43 External teeth 44 Rotating body driving hydraulic motor 46 Driving gear 47 Steel pipe part 48 Collar Support Block 48a Bolt 49 Peripheral Tapered Surface 50 Wedge Mechanism 51 Concave Groove 52 Pile Holding Diameter Adjustment Jig 53 Chuck Body Part 54 Front Plate 55 Chuck Bracket Part 56 Mounting Base 57 Stopping Member 58 Lower Plate 59 Body Body 60 Circular Base 61 Top Plate 62 Intermediate gear

Claims (6)

Installing two first mounts on which only one leg seat of the steel pipe pile rotary press-fitting device can be placed;
The steel pipe pile rotary press-fitting device's leg seats are placed one by one on the first gantry, and the steel pipe pile rotary press-fitting device's other leg seats are not placed on the first pedestal. Installing the rotary press-fitting device in a horizontal state;
Building a steel pipe pile for rotary press fitting into the steel pipe pile rotary press fitting device;
In a state where the lower part of the steel pipe pile for rotary press-fitting is gripped by the steel pipe pile rotary press-fitting device, the jack of the steel pipe pile rotary press-fitting device connected to the leg seat is adjusted, and the steel pipe pile rotary press-fitting device and the rotation A step of inclining the steel pipe pile for press-fitting with respect to the ground;
Driving the steel pipe pile rotary press-fitting device and press-fitting into the ground while rotating the steel pipe pile for rotary press-fitting; and
A method for constructing slant piles.   The construction method of the slant pile of Claim 1 which further has the step which installs a stop member in the position corresponding to the said other leg seat of the said steel pipe pile rotation press-fit apparatus. In the state where the lower part of the steel pipe pile for rotary press-fitting is gripped by the steel pipe pile rotary press-fitting device, the jack is adjusted to separate the leg seat from the ground surface;
Installing a second pedestal between the leg seat and the ground surface spaced from the ground surface;
Placing the leg seat spaced from the ground surface on the second frame;
The construction method of the slant pile of Claim 1 or 2 which further has these. In a state where the steel pipe pile for rotary press-fit is installed in a horizontal state and grips the lower part of the steel pipe pile for rotary press-fit, the jack of the steel pipe pile rotary press-fit device connected to the leg seat is adjusted to Inclining the steel pipe pile with respect to the ground, having a steel pipe pile rotary press-fitting device that press-fits the ground while rotating the steel pipe pile for rotary press-fitting,
When the steel pipe pile rotary press-fitting device is installed in a horizontal state or an inclined state, the steel pipe pile rotary press-fitting device has at least two first mounts on which only one leg seat of the steel pipe pile rotary press-fitting device is placed,
When the steel pipe pile rotary press-fitting device is installed in a horizontal state or an inclined state, the at least two first mounts are installed, and the other leg seats of the steel pipe pile rotary press-fitting device are placed on the first stand. A construction facility for slant piles, which has a seat plate provided with a steel pipe pile insertion hole through which the steel pipe pile can be penetrated.   The inclined pile construction equipment according to claim 4, wherein a stop member is provided on the seat plate at a position corresponding to the other leg seat of the steel pipe pile rotary press-fitting device. The leg seat separated from the seat plate when the jack is adjusted and the leg seat is separated from the seat plate in a state where the lower portion of the steel tube pile for rotary press fitting is gripped by the rotary press fitting device. 6 or 5, further comprising a second frame on which the leg seat separated from the seat plate is placed after being installed between the leg seat and the seat plate. The construction equipment for the listed piles.

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