JP6523867B2 - Pile press-in method, reaction frame and pile press-in and pull-out machine - Google Patents

Description

  The present invention relates to a pile press-fitting method, a reaction frame and a pile press-fitting and drawing-out machine used for the pile press-fitting method.

  As a method to drive and bury piles such as various shaped steels and steel pipe piles in the ground, grasp the upper end of the existing piles embedded in the ground with the clamps of the pile press-in and pull-out machine, take the reaction force, and chuck the piles There is known a construction technique in which new piles are sequentially press-fitted to positions adjacent to existing piles by raising and lowering them. The pile press-in and pull-out machine used for this construction is fixed to an existing pile via a clamp, a base portion of the pile press-in and pull-out machine called a saddle, a slide frame movable in the longitudinal direction with respect to the saddle, A leader mast pivotable about a longitudinal axis on the frame and a chuck frame with a chuck attached that can be raised and lowered in front of the leader mast. Further, the chuck is provided with an opening through which a pile to be press-fitted is inserted in the vertical direction, and a pair of chuck claws for holding the pile passed through the opening. Then, the pile vertically inserted into the opening of the chuck is gripped by a pair of chuck claws, and the chuck frame and the chuck are integrally lifted and lowered by the hydraulic cylinder along the leader mast to press-fit the pile into the ground It is supposed to be.

  As described above, the pile press-in and pull-out machine is positioned adjacent to the existing pile by grasping the upper end of the already-placed existing pile with the clamp provided on the lower surface of the saddle and taking a reaction force to raise and lower the chuck holding the pile. New piles are pressed in one after another, but when the piles are pressed in first (initial press-in), there is still no pile for taking the reaction force, so the reaction frame has been It is used (patent document 1, non-patent document 1).

  Although this type of conventional reaction frame is installed on the ground and used, in order to install the reaction frame horizontally and realize stable press-in operation at the time of pile press-in, the soil condition and press-in to this reaction frame Depending on the length of the pile to be piled, load a large amount of reaction weight such as piles and steel materials, fix the pile press-in and pull-out machine with this reaction force frame by clamps, and press-in the first pile. Then, the pile is pressed in sequentially, and when the predetermined number of press-in is finished, the reaction force weight is removed from the reaction rack, and thereafter the pressed-in pile is gripped by a clamp and the subsequent pile is pressed in.

Japanese Utility Model Application Publication No. 56-171838

“SILENT PILING TECHNOLOGIES”, [online], May 9, 2015, Japan Press-in Association, [Search on June 30, 2015] Internet <URL: http://www.giken.com/files/en/press- in / Press-in_Method_Variations_ver028ja03.pdf>

  By the way, in this type of press-fitting method, piles to be press-fitted are not adjacent to each other such as, for example, steel pipe piles and various shaped steels which are vertically disposed when constructing a structure for retaining earth In some cases, the pile may be press-fitted by separating a predetermined distance.

  In such a case, in the method using the conventional reaction frame, after the first pile is press-fitted, the pile press-in / out machine, the reaction weight, and the reaction frame are sequentially removed, and then the reaction force is again moved to a predetermined distance. After loading the gantry, the reaction force weight is loaded on the reaction rack, and then the pile press-in and pull-out machine is installed on the reaction rack and fixed to the reaction rack.

  However, these pile press-in and pull-out machines, reaction force weights, and reaction force racks have large masses, and all the above-mentioned loading, moving, and removal must be suspended by a crane, which requires considerable labor, labor, and time. It was In addition, when hard ground and piles are large, the mass of these pile press-in and pull-out machines, reaction force weights and reaction force racks increase accordingly, and the sizes of pile press-in and pull-out machines and reaction force racks As a result, there is a problem that the crane for work is also upsized.

  The present invention has been made in view of such a point, and in the case where the piles are separated by press-fitting the piles, the pile press-in / out machine, the reaction weight, the reaction frame, etc. An object of the present invention is to solve the above-mentioned problems by smoothly performing a press-fitting operation without removing it after loading or press-fitting.

In order to achieve the above object, according to the present invention, a reaction stand for receiving a reaction force when a pile is pressed into the ground by a pile press-in and pull-out machine, and a leader movable horizontally relative to the reaction stand. A pile press-in method using a pile press-in and pull-out machine provided with a mast and a chuck for holding a pile supported up and down with respect to the leader mast,
An operation of holding the entry support member with the chuck and fixing the reaction support frame installed on the ground and the pile press-in and pull-out machine to lower the chuck to enter the entry support member into the ground;
Thereafter, instead of the approach support member entering the ground, the support mast obtained from the approach support member is used as a reaction force to the chuck which grips the approach support member, the leader mast and the reaction support frame. Moving up together
Thereafter, in a state in which the approach support member is gripped by the chuck, an operation of moving the reaction force support frame horizontally with respect to the reader mast;
Thereafter, the leader mast and the reaction frame are integrally lowered with respect to the chuck, and then the chuck is raised to withdraw the entry support member from the ground, and then the leader mast and the chuck are And horizontal movement with respect to the force rack.
And, after moving the pile press-in and pull-out machine and the reaction frame to a predetermined position by repeating the series of operations, that is, the four operations described above one or more times, the chuck for the entry support member Releasing the grip, holding the pile with the chuck and pressing it into the ground.

According to the present invention, the reaction support frame installed on the ground and the pile press-fit and pull-out machine are fixed, the entry support member is gripped by the chuck, the chuck is lowered, and the entry support member is underground And then, instead of the approach support member entering the ground, the support force obtained from the approach support member is used as a reaction force to the leader mast for the chuck that grips the approach support member, and The reaction frame is integrally raised, and then the reaction frame is moved horizontally with respect to the reader mast in a state where the approach support member is gripped by the chuck, and then the leader mast and the reaction frame are integrated. After lowering the chuck with respect to the chuck, the chuck is raised to pull out the approach support member from the ground, and then the leader mast and the chuck are Since it was made to move horizontally with respect to the reaction frame, the weight of the pile press-in and pull-out machine and the weight of the reaction frame are received by the supporting force of the press-in ground, and the pile press-in machine and the reaction frame are integrally raised. In the closed state, it is possible to move the pile press-in and pull-out machine and the reaction force frame integrally from the entry support member as a starting point. Therefore, it can be said that the so-called pile press-in and pull-out machine and the reaction frame can run together as one. Therefore, in the case where the piles are press-fitted by pressing away the piles as in the conventional case, it is not necessary to carry in the pile press-in / out machine, the reaction weight and the reaction frame by a crane etc.
Then, after moving the pile press-fit / extraction machine body and the reaction force pedestal to a predetermined position by repeating the above-described series of operations once or several times, the gripping of the chuck against the support member is released and the press-fit is performed by the chuck By holding and pressing in the pile to be piled, the pile can be pressed in at a predetermined position where the piles are separated.

In the present invention, the entry support member refers to a member for receiving the weight of the pile press-in and pull-out machine and the weight of the reaction frame by the supporting force of the press-fit ground, such as piles of various shaped steels and steel pipe piles. Then, instead of the approach support member entering the ground, the support force obtained from the approach support member is used as a reaction force to the chuck which holds the approach support member, the leader mast and the reaction frame are In order to raise integrally, for example, the pile is inserted by press-fitting to a predetermined depth or the like, and as a result, the press-in resistance increases, or when the tip of the pressed-in pile reaches rock or hard geology, the approach support member Can be raised by using the supporting force obtained from. An auger casing having an auger screw in the casing can also be used.
In addition, as a pile, the various shaped steels (steel sheet pile, H steel etc.), a steel pipe sheet pile, a steel pipe pile, a concrete pile etc. which are used for this kind of press-fit construction method can be illustrated.

  Even if the approach support member is made to enter the ground, if the weight of the pile press-in and pull-out machine and the weight of the reaction frame are not received by the supporting force of the press-in ground, the approach support member is made to enter the ground. On the way, a member that blocks the approach support member from entering the ground may be provided on the approach support member, and the approach support member may be forcibly stopped by the blocking member from entering the ground. . As a member which prevents an approach support member from entering the ground, it is fixed to the outer periphery of the approach support member, such as a flange provided on the outer periphery of a pile, a steel pipe or the like, to increase press-fit resistance.

According to another aspect, the present invention provides a reaction stand for receiving a reaction force when a pile is pressed into the ground by a pile press-in and pull-out machine, and a leader movable horizontally relative to the reaction stand. A pile press-in method using a pile press-in and pull-out machine provided with a mast and a chuck for holding a pile supported up and down with respect to the leader mast,
An operation of holding the installation support member by the chuck with the reaction support frame installed on the ground fixed to the pile press-in and pull-out machine, and lowering the chuck to install the installation support member on the ground;
Thereafter, using the supporting force of the installation support member as a reaction force, an operation of integrally raising the reader mast and the reaction frame relative to the chuck holding the installation support member;
Thereafter, in a state where the installation support member is gripped by the chuck, an operation of moving the reaction force rack horizontally with respect to the reader mast;
Thereafter, after the leader mast and the reaction frame are integrally lowered with respect to the chuck, the chuck is raised to lift the installation support member.
Thereafter, the reader mast and the chuck are moved horizontally with respect to the reaction rack.
And, after moving the pile press-in and pull-out machine and the reaction force frame to a predetermined position by repeating the series of operations, that is, the five operations described above one or more times, the chuck for the installation support member It is characterized in that the grip is released and the pile is gripped by the chuck and pressed into the ground.

  In each pile press-in method, the base portion of the leader mast may be slidably provided in a saddle that supports the leader mast, and the saddle may be fixed to the reaction force frame.

  In each pile press-in method, the base portion of the leader mast may be directly provided slidably on the reaction frame.

  The reaction force carrier used in each of these pile press-in methods may have, for example, a roller interposed between the ground and the reaction force carrier when integrally raised with the leader mast.

  In addition, the pile press-in and pull-out machine used in each of these pile press-in methods has a roller interposed between the ground and the pile press-in and pull-out machine when the leader mast ascends integrally with the reaction frame. It is also good.

  Furthermore, it is preferable that the center of gravity of the reaction force stand used in each of the pile press-in methods be located forward of the fixed portion of the pile press-in and pull-out machine and the reaction stand.

  In this case, at least a part of the frame of the reaction massaging frame may be pivotable laterally around the base of the reaction massaging frame.

  The reaction force frame used in each of these pile press-in methods may have means for receiving the rotation moment generated as the chuck rotates on the ground side.

  In addition, the pile press-fit and draw-out machine used in each of the pile press-fit methods may have means for receiving the rotation moment generated as the chuck rotates on the ground side.

  According to the present invention, since the pile press-in and pull-out machine and the reaction frame can be integrated and self-propelled, the pile press-in with a crane or the like can be performed in the case of pressing the piles apart from each other as in the prior art. It is not necessary to carry in the drawing machine, the reaction weight, and the reaction rack to the press-in position, and to remove them after each press-in.

It is an explanatory view showing typically the side of a pile press fit and withdrawal machine used for an embodiment of the present invention. It is a top view of the reaction force rack used for the embodiment of the present invention. It is explanatory drawing which shows the construction process of the press-fit method which concerns on embodiment of this invention, and shows the state which press-fits the steel sheet pile which should be pressed-in initially. It is explanatory drawing which shows the construction process of the press-fit method which concerns on embodiment of this invention, and shows the state which set the steel sheet pile as an approach support member to a pile press-in and pull-out machine after pressing in the steel sheet pile which should be press-in first. . It is explanatory drawing which shows the construction process of the press-fit method based on embodiment of this invention, and shows the state which attached the collar which prevents approach to the steel sheet pile as an approach support member. The construction process of the press-fit method according to the embodiment of the present invention is shown, and the support force of the steel sheet pile with the flange that prevents entry is used for the clamp, saddle, slide frame, leader mast, and reaction force support of the pile press-in and pull out machine. It is explanatory drawing which shows the state which raised integrally. It shows the construction process of the press-fit method according to the embodiment of the present invention, and illustrates a state in which the slide frame of the pile press-in and pull-out machine is slid to move the clamp, saddle and reaction force frame of the pile press-in and pull-out machine backwards. FIG. The construction process of the press-fit method according to the embodiment of the present invention is shown, and after moving the clamp, saddle and reaction frame of the pile press-in and pull-out machine backward, the clamp, saddle, slide frame and leader of the pile press-in and pull-out machine It is an explanatory view showing the state where a mast and a reaction force stand were made to descend on the ground in one. It is an explanatory view showing the construction process of the press-fit method according to the embodiment of the present invention, removing the collar from the steel sheet pile as the approach supporting member, and thereafter pulling out the steel sheet pile to move the slide frame to the rear. The construction process of the press-fit method which concerns on embodiment of this invention is shown, and it is explanatory drawing which shows the state which tries to press-fit the steel sheet pile as an approach support member again after moving a pile press in and drawing out machine and reaction force stand back. It is. It is explanatory drawing which shows the example which provided the roller in the reaction force stand. It is an explanatory view showing a state where a rotary press fit type pile press fit and pull machine grips an installation support member with a chuck. It is a top view of the reaction force mount used in FIG. It is an explanatory view showing the state where a pile press fit and pull out machine which can press fit and pull out a steel sheet pile grips an installation support member with a chuck. It is a top view of the reaction force stand which constituted the side frame rotatably. It is explanatory drawing which shows the example of arrangement of the steel pipe pile constructed using the reaction-force stand of FIG. 15, and shows the state which curved and arranged by planar view. It is explanatory drawing which shows the example of arrangement of the steel pipe pile constructed using the reaction-force stand of FIG. 15, and changes the arrangement direction at right angles by planar view, and is arranged. It is explanatory drawing which shows the example of arrangement of the steel pipe pile constructed using the reaction-force stand of FIG. 15, and shows the state which changed and arranged the arrangement direction in zigzag in planar view. It is explanatory drawing of the planar view which shows a mode that the rotational moment has generate | occur | produced in the pile press-fit pullout machine of a rotation press-fit type. It is an explanatory view showing an example which provided an anchor device in a pile press fit pullout machine of a rotation press fit type. It is an explanatory view showing an example which provided an anchor device in a reaction force stand used for a pile press fit pullout machine of a rotation press fit type. It is a side view of the reaction force stand which can attach a slide frame directly. It is a top view of the reaction force rack of FIG. It is a partial cross section side view which shows a mode that the pile press-fit extraction machine which does not have a base part is attached to the reaction-force stand of FIG. It is a top view which shows a mode that the pile press-fit extraction machine which does not have a base part is attached to the reaction-force stand of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present specification and the drawings, elements having substantially the same functional configuration will be assigned the same reference numerals and redundant description will be omitted.

  FIG. 1 shows the side of a pile press-in and draw-out machine 1 used in the embodiment. The pile press-fitting and drawing machine 1 is used when press-fitting a steel sheet pile. A plurality of clamps 11 are mounted on the lower surface of a saddle 10 which is a base portion of the pile press-in and pull-out machine 1. The clamp 11 has a function of holding the saddle 10 by gripping an existing pile or the upper end of the fixed portion 21 set on the rear side of the reaction force frame 20 by driving a hydraulic cylinder (not shown) and taking a reaction force of press fit. ing. In addition, in FIG. 1, back is the paper surface left side, and the paper surface right side is the front.

  A leader mast 13 is slidably mounted on the upper surface of the saddle 10 via a slide frame 12 movable in the front-rear direction, and a chuck frame 14 and a chuck 15 are disposed in front of the leader mast 13 . The slide frame 12 serves as a base of the reader mast 13. The slide frame 12 moves forward and backward on the upper surface of the saddle 10, whereby the leader mast 13, the chuck frame 14 and the chuck 15 integrally move forward and backward, and the operation of the main cylinder 16 further raises and lowers the chuck frame 14 and the chuck 15. Do. The chuck 15 is configured to be rotatable on the lower surface of the chuck frame 14. The leader mast 13 is provided on the slide frame 12 so as to be pivotable on the slide frame 12.

  The chuck 15 has an opening (not shown) through which the steel sheet pile U is inserted in the vertical direction, and a pair of horizontally opposed chuck claws for gripping the steel sheet pile U passed through the opening. (Not shown) is provided. The chuck claw is constituted by a movable claw and a fixed claw, and the movable claw and the fixed claw can be moved closer to and separated from each other by driving the movable claw by the cylinder 17.

  The reaction frame 20 used in this embodiment has the above-mentioned fixing portion 21 on the rear side of the base 22 of the reaction frame 20, as its plane is shown in FIG. Further, side frames 23 and 24 are provided on the front side of the base 22 of the reaction frame 20. The side frames 23 and 24 and the base 22 form a generally U-shaped plan view as a whole. On the outer side of each side frame 23, 24, weight portions 23a, 24a for securing a sufficient mass are provided. The fixing portion 21, the base 22, the side frames 23, 24, and the weight portions 23a, 24a may be divided structures in consideration of the convenience of transportation.

  And, in the present embodiment, the center of gravity of the reaction frame 20 is set forward of the fixed portion 21. More specifically, for example, it is preferable to be set at a position facing the center of gravity of the pile press-in and pull-out machine 1 with a steel sheet pile to be press-fitted and a steel sheet pile S as an approach support member described later interposed.

  The pile press-in and pull-out machine 1 and the reaction frame 20 used in the embodiment are configured as described above. Next, a pile press-in method according to the embodiment will be described.

  First, as shown in FIG. 3, the reaction rack 20 is installed on the ground, and the fixing portion 21 of the reaction rack 20 is clamped by the clamps 11 of the pile press-in and pull-out machine 1. Fix 20 and. Next, the steel sheet pile U to be press-fit first is set to the chuck 15, and the main cylinder 16 is operated at a predetermined position to press-fit the steel sheet pile U. After press-fitting the steel sheet pile U to a predetermined depth, the gripping by the chuck 15 is released and the chuck frame 14 is raised.

  Next, as shown in FIG. 4, the slide frame 12 is slid backward (open arrow in the figure) to cause the chuck 15 to grip the steel sheet pile S as an entry support member.

  Thereafter, as shown in FIG. 5, the steel sheet pile S is pressed in. Then, when the press-in operation is stopped to a predetermined depth, the press-in operation is interrupted, and a flange SF that prevents the steel sheet pile S from entering the ground is attached to the side of the steel sheet pile S near the ground. The collar SF has, for example, a frusto-conical shape as a whole as a whole and a divisible structure. When the mounting operation of the collar SF is completed, the main cylinder 16 is operated to start the press-in operation again.

Then, the press fit resistance of the steel sheet pile U into the ground is greatly increased by the flange SF. If the main cylinder 16 is still operated at this time, as shown in FIG. 6, at the flange SF of the steel sheet pile S, this time, the reaction frame 20, the clamp 11, the saddle 10, the slide frame 12, the leader mast 13 integrally rises with respect to the chuck 15 holding the steel sheet pile S. That is, the weight of the reaction frame 20, the clamp 11, the saddle 10, the slide frame 12, and the leader mast 13 is received by the supporting force of the ground through the steel sheet pile S, and the reaction cylinder 20 is operated by the operation of the main cylinder 16. The clamp 11, the saddle 10, the slide frame 12, and the leader mast 13 are integrally raised.
Here, although an example in which the state shown in FIG. 5 is shifted to the state shown in FIG. 6 by attaching the collar SF to the steel sheet pile S has been described, the steel sheet pile S is not attached to the steel sheet pile S. It may be made to shift from the state shown in FIG. 5 to the state shown in FIG.

  At this time, since the center of gravity of the reaction frame 20 is located forward of the fixed portion 21, the clamp 11, the saddle 10, the slide frame 12 integrated with the reaction frame 20 with the steel sheet pile S as a fulcrum. Even if the leader mast 13 ascends, the overturning moment to the rear (left side in the figure) is small. In order to realize a more stable state, for example, a weight for moving the center of gravity in the back and forth direction is provided slidably on the reaction frame 20, for example, on the side frames 23, 24 or weight portions 23a, 24a. May be

  Then, in this state (the state in which the chuck 15 grips the steel sheet pile S), as shown by the arrow in FIG. 7, the slide frame 12 is slid in the horizontal direction, whereby the clamp 11 and the saddle 10 of the pile press-in and pull-out machine 1 are And the reaction frame 20 move rearward (left side in the figure).

  After moving the main cylinder 16 in the reverse direction after moving it by a predetermined distance, as shown in FIG. 8, the clamp 11, the saddle 10, the slide frame 12, and the leader mast 13 are lowered together with the reaction frame 20. The reaction frame 20 is placed on the ground.

  Then, as shown in FIG. 9, the flange SF attached to the side of the steel sheet pile S is removed, and then the main cylinder 16 is operated to draw out the steel sheet pile S, and then the slide frame 12 is operated to operate the pile press-in and pull-out machine 1 The leader mast 13, the chuck frame 14, and the chuck 15 are moved backward (left side in the drawing). As a result, the state shown in FIG. 10 is obtained, and thereafter, the pile press-in / withdrawal machine 1 and the reaction frame 20 can be moved rearward (left side in the drawing) by repeating the same operation shown in FIGS. it can. Then, when reaching a predetermined distance from the steel sheet pile U pressed in first, the steel sheet pile S is pulled out, the gripping of the steel sheet pile S by the chuck 15 is released, and instead of the steel sheet pile S, the piles are separated and pressed in By holding the other steel sheet pile U to be held by the chuck 15 and pressing it in, the steel sheet pile U can be sequentially pressed in while being separated by a predetermined distance.

  As described above, according to the present embodiment, the operation of the main cylinder 16 and the slide frame 12 of the pile press-in and pull-out machine 1 causes the pile press-in and pull-out machine 1 and the reaction frame 20 to self-propelled in a construction site. It is possible to press the steel sheet piles U at desired positions one after another by a predetermined distance. Therefore, when press-fitting steel sheet piles U by separating the piles as in the prior art, the reaction force weight, reaction frame and pile press-in / out machine are respectively suspended by cranes and carried into the site and these reaction forces after press-in There is no need for the complicated work of removing the weight, the reaction frame and the pile press-in and pull-out machine, and then transporting it to the next press-in position with a crane and installing it again.

  The reaction frame 20 is substantially U-shaped in plan view by the side frames 23 and 24 and the base 22, and as shown in FIG. 2, the chuck 15 of the pile press-in and pull-out machine 1 is side in plan view. Since it is located between the frames 23 and 24, the entire center of gravity is close to the press-in position at the time of press-in, and the weight of the reaction frame 20 can be effectively used at the time of press-in, and the press-in operation can be performed stably. it can.

  As described above, since the center of gravity of the reaction frame 20 is configured to be positioned forward of the fixed portion 21, the clamp 11 integrated with the reaction frame 20 with the steel sheet S as a fulcrum as a fulcrum 10, even if the slide frame 12 and the leader mast 13 are lifted, the overturning moment to the rear (left side in the figure) is small, but as shown in FIG. The clamp 11, the saddle 10, the slide frame 12, the leader mast 13, and the reaction frame 20 are integrated when the roller 31 interposed between the frame and the reaction frame 20 is provided on the rear side of the reaction frame 20. When it ascends, it can be reliably prevented from falling backward (left side in the figure). Furthermore, even in the state shown in FIG. 7, that is, when the slide frame 12 is operated and the saddle 10 is moved rearward together with the reaction rack 20, this can be smoothly performed.

  The roller 31 may be provided on the reaction frame 20 so as to be supported by, for example, a hydraulic cylinder. Furthermore, the roller 31 may be provided on the side of the pile press-in and pull-out machine 1, for example, on the saddle 10. Further, it is preferable that the roller 31 itself is not only rotatable in the horizontal direction, but also rotatable around the vertical axis. For example, so-called free rollers can also be used.

  In the embodiment described above, the steel sheet pile S, which is the entry support member, is gripped by the chuck 15 of the pile press-in and pull-out machine 1 and is press-fit on the ground. The clamp 11, the saddle 10, the slide frame 12, and the leader of the pile press-in and pull-out machine 1 Although the weight of the mast 13 and the reaction rack 20 was raised and received, it was supported, but instead of such an approach supporting member, using the installation support member, raising of the pile press-in pullout machine and the reaction rack You may receive the weight of time.

  FIG. 12 shows an example of such a case, and the pile press-in and pull-out machine 41 shown in FIG. 12 is used when press-fitting a steel pipe pile. The pile press-in and pull-out machine 41 is configured as a so-called rotary press-in type pile press-in and pull-out machine, in which a steel pipe pile is held while being gripped by the chuck 15 and rotated. There is.

  The pile press-in and pull-out machine 41 is fixed to the reaction force mount 20 by the clamp 42 at the fixing portion 21 of the reaction load stand 20. That is, as shown in FIG. 13, the fixing portion 21 is formed with clamp holes 21a and 21b, and the pressing members (the clamps 42 provided on the lower surface of the saddle 10) are formed in the holes 21a and 21b. The saddle 10 and the reaction frame 20 are fixed by pressing the inside (not shown) from the inside to the outside, for example, with a hydraulic cylinder or the like.

  The reaction frame 20 is provided with a fixed portion 21 at the rear of the base 22 and side frames 23, 24 at the front of the base 22 so as to be substantially U-shaped in a plan view. Further, weight portions 23a and 24a are provided on the outside of the side frames 23 and 24, respectively.

  According to the pile press-in and pull-out machine 41 having such a configuration, although illustration is omitted, as in the case of the pile press-in and pull-out machine 1, the saddle 10 and the reaction frame 20 are fixed by the clamp 42 Using a steel pipe pile as a member, the clamp 42, the saddle 10, the slide frame 12, the leader mast 13, and the reaction frame 20 are integrally raised by the operation of the main cylinder 16 through the same construction process. The slide 42 and the slide 10 allow the clamp 42 and the saddle 10 to be moved rearward together with the reaction rack 20. As a steel pipe pile as a penetration support member, for example, a cylindrical steel pipe pile, a steel pipe pile with a tip blade provided with a spiral blade at the tip of the steel pipe, and a substantially conical tip wing provided at a steel pipe tip portion A tipped steel pipe pile can be used. When the clamp 42, the saddle 10, the slide frame 12, the leader mast 13, and the reaction frame 20 are integrally raised by the operation of the main cylinder 16, a member that prevents the steel pipe pile from entering the ground is a steel pipe pile. In the case of attaching to the outer periphery near the ground surface, for example, a member having an overall outer shape having a frusto-conical shape and having a divisible structure is used as the member.

  In the embodiment using the entry support member described above, an example using a pile such as a steel sheet pile or a steel pipe pile has been described as the entry support member, but instead of the pile, an auger casing incorporating an auger screw is used May be When the auger casing is used as an approach support member, the auger screw is rotated at the time of approach to the ground, and when the approach to the ground is finished to a predetermined depth, the auger screw is stopped and the main cylinder 16 is operated in that state. Thus, the weights of the clamps 11 and 42, the saddle 10, the slide frame 12, the leader mast 13 and the reaction rack 20 of the pile press-in and pull-out machines 1 and 41 can be received and supported by the auger casing.

  Such approach support members, such as steel pipe piles and auger casings, involve an approach operation into the ground. However, in the present invention, it is also possible to make the reaction frame and the pile press-in / withdrawal machine self-propelled in the field without performing such an approach movement of the approach support member into the ground.

  FIG. 12 shows the case of using the installation support member 51 used in place of such an approach support member. For example, the installation support member 51 has a cylindrical outer shape as a whole. Also, in the case where the clamp 42 of the pile press-in and pull-out machine 41, the saddle 10, the slide frame 12, the leader mast 13 and the reaction frame 20 are integrally raised by gripping with the chuck 15 and operating the main cylinder 16 In order to achieve good stability, the installation support member 51 has a corresponding weight. In order to obtain sufficient stability and support from the ground, as shown in FIG. 12, a pedestal 52 may be provided on the lower portion of the installation support member 51.

  For example, in a state where the pile press-in and pull-out machine 41 is self-propelled and fixed to the reaction frame 20, the clamp 15 of the pile press-in and pull-out machine 41, the saddle 10, the slide frame 12, the leader When the mast 13 and the installation support member 51 are integrally raised with respect to the chuck 15, a weight is required to suppress the moment in which the pile press-in and pull-out machine 41 falls backward. This weight is the weight of the clamp 42, the saddle 10, the slide frame 12, the leader mast 13, and the reaction support frame 20 of the pile press-in and pull-out machine 41, and the clamp 42, the saddle 10, the slide frame 12, and the leader mast 13 when lifted. Since it fluctuates depending on the relationship between the position of the center of gravity and the center of gravity of the installation support member 51 or the presence or absence of the roller 31 described above, these are collectively set.

  The clamp 42 of the pile press-in and pull-out machine 41, the saddle 10, and the slide frame 12, by holding the installation support member 51 like this with the chuck 15 and operating the main cylinder 16 in the direction to lower the installation support member 51 in that state. The leader mast 13 and the reaction force stand 20 can be integrally raised with respect to the chuck 15 holding the installation support member 51. After that, slide the slide frame 12 in the horizontal direction, move the clamp 42 of the pile press-in and pull-out machine 41, the saddle 10 and the reaction frame 20 integrally back, and then operate the main cylinder 16 in the reverse direction. The clamp 42 of the pile press-in and pull-out machine 41, the saddle 10, the slide frame 12, the leader mast 13 and the reaction rack 20 are integrally lowered to install the reaction rack 20 on the ground. Then, the main cylinder 16 is operated to raise the installation support member 51, and by moving the slide frame 12 to the rear in this state, the installation support member 51 can be moved to the rear.

  Such operation is repeated, and when the reaction frame 20 and the pile press-in and pull-out machine 41 reach predetermined positions, the steel pipe pile to be rotationally press-fitted is gripped by the chuck 15 instead of the installation support member 51 and the steel pipe pile It suffices to press fit. As described above, even if the installation support member 51 is used instead of the entrance support member, the reaction frame 20 can be made to self-propelled if it is at the construction site, and the steel pipe piles are separated sequentially by a predetermined distance at a desired position. It can be pressed in. Of course, as in the case of using the above-mentioned approach support member, the reaction weight, reaction rack and pile press-in and pull-out machine are respectively suspended by a crane and carried in to the site and press-fit after these reaction weight, reaction block and pile press-in. The conventional complicated operation of removing the drawing machine and transporting it again by the crane to the next press-in position and installing one after another is unnecessary. In addition, without using such a dedicated installation support member 51, for example, it is used in the existing rotary press-fit method, is installed on the existing steel pipe pile, and installs the striking down device for further pressing the existing steel pipe pile. It may be used as the support member 51. When such a striking down device is used, for example, it is preferable to provide a detachable member having a divisible structure which has a frusto-conical shape as a whole and has a dividable structure on the lower periphery.

  As described above, the pile press-in and pull-out machine 41 to which the installation support member 51 is applied is configured as a so-called rotary press-in type pile press-in and draw-out machine that press-in and pull out a steel pipe pile. The press-in construction method using the installation support member 51 can also be performed by the above-described pile press-in and pull-out machine 1 for press-fitting and drawing out the shaped steel.

  FIG. 14 shows such a situation. The installation support member 51 used here has a pedestal 52 at the lower part, and has a shape similar to the installation support member 51 used in the rotary press-in type pile press-in and pull-out machine 41, The portion gripped by the chuck 15 has the same shape as the horizontal cross section of the shaped steel such as the steel sheet pile U. Further, in order to obtain sufficient stability and support force from the ground, the pedestal 52 is generally shaped like a truncated cone as a whole. By using such an installation support member 51, the installation support member 51 is used as described in the above-described pile press-in and pull-out machine 41 of the rotary press-in method also by the pile press-in and withdrawal machine 1 for press-fitting and drawing out shaped steel. Thus, it is possible to suitably carry out the work of self-running the pile press-in and pull-out machine 1 and the reaction force stand 20 at the site and separating and press-fitting the pile.

  The above-described reaction frame 20 has a structure in which the side frames 23 and 24 are fixed to the base 22, but as shown in FIG. 15, one or both of the side frames 23 and 24, for example, the base It may be configured to be rotatable in the horizontal direction centering on the 22 side. Such rotational movement of the side frames 23, 24 can be realized by, for example, a hydraulic cylinder, a motor or the like.

  By configuring the reaction force frame 20 in this manner, for example, using a pile press-in / extraction machine in which the leader mast 13 is rotatably configured on the slide frame 12, movement of the slide frame 12 in the front-rear direction and the leader mast 13 By jointly using the turning operation of the above, piles such as steel pipe piles and steel sheet piles can be separated and press-fitted in various arrangements as shown in FIG. 16 to FIG.

  FIG. 16 shows an example of an arrangement in which the steel pipe piles P1 to P4 are curved and curved and pressed into one another, and FIG. 17 shows an arrangement in which the steel pipe piles P1 to P6 move apart in a different direction. An example is shown and FIG. 18 shows an arrangement example in which the steel pipe piles P1 to P8 are separated and pressed in while changing the traveling direction for each one so as to become a zigzag in plan view.

  When the steel pipe pile P is rotationally press-fitted using the rotary press-fit type pile press-in and pull-out machine 41, as shown by the thick arrows in FIG. It occurs on 20. In order to cope with such a situation, for example, as shown in FIG. 19 to FIG. 21, an anchor device 61 that receives the rotational moment on the ground side may be provided in the pile press-in and pull-out machine 41 or the reaction frame 20.

  The example shown in FIG. 20 shows an example in which the anchor device 61 is provided on the side of the pile press-in and pull-out machine 41, and the anchor device 61 is provided on the rear end of the saddle 10 of the pile press-in and pull-out machine 41. The anchor device 61 has an anchor portion 62 which enters the ground and a cylinder portion 63 which moves the anchor portion 62 up and down. By providing the anchor device 61, the rotational moment generated when the steel pipe pile P is rotationally press-fit by the pile press-in and pull-out machine 41 is received by the anchor portion 62 on the ground side via the saddle 10 of the pile press-in and pull-out machine 41. .

  The example shown in FIG. 21 shows an example in which the anchor device 61 is provided on the side of the reaction frame 20, and the anchor device 61 is provided on the rear end of the reaction frame 20 via the support portion 64. As a result, the rotational moment generated when the steel pipe pile P is rotationally press-fitted by the pile press-in and pull-out machine 41 is received by the anchor portion 62 on the ground side via the reaction frame 20.

  In addition, although the anchor apparatus 61 shown to FIG. 20, 21 all had the anchor part 62 made to approach into the earth, if it is a thing of the structure which receives a rotational moment by the ground side, it will be limited to this example. Absent.

  For example, an iron plate is laid on the ground, and the reaction frame 20 is installed thereon, and the saddle 10 and the reaction frame 20 of the pile press-in and pull-out machine 41 are provided with a magnet device, and the iron plate laid is pressed in by a magnet of the magnet device. The saddle 10 of the pull-out machine 41 and the reaction frame 20 may be fixed. Also by fixing with such a magnet, it is possible to receive on the ground side a rotational moment generated when the steel pipe pile P is rotationally press-fitted by the pile press-in and pull-out machine 41.

  Further, the above-described reaction frame 20 has side frames 23 and 24 provided on the front both sides of the base 22, and has a fixing portion 21 at the rear of the base, and has a substantially U-shape in a plan view However, of course, the reaction force pedestal that can be adopted in the present invention is not limited to such a shape, and may be, for example, a reaction force pedestal having a substantially H-shaped shape in plan view. According to such an approximately H-shaped reaction force rack, according to a reaction force rack provided with rear side frames similar to the side frames 23 and 24 on both rear sides of the fixed portion 21, the stability on the rear side is improved. . In addition, in the reaction frame having such a shape, this rear side frame may be used as a fixing portion with the saddle 10 of the pile press-fit / draw machine.

  By the way, in the above-described embodiment, the saddle 10 of the pile press-in and pull-out machine 1 or 41 and the reaction frame 20 are fixed via the clamp 11 or the clamp 42 in each case, but FIGS. As shown, the clamp and the saddle of the pile press-in and pull-out machine may be omitted, and the slide frame 12 of the pile press-in and pull-out machine may be directly and slidably attached to the reaction frame 70.

  That is, as shown in FIG. 23, the reaction frame 70 has side frames 72 and 73 in front of both sides of the base 71 and has a substantially U-shape in plan view as a whole. An attachment portion 74 is provided on the top.

  The mounting portion 74 has guides 74a and 74b extending in the front-rear direction (left and right direction in the drawing) on both sides (upper and lower in the drawing). Further, at a rear end of the mounting portion 74, a fixing member 75 for fixing an end of a cylinder rod 82 of a cylinder 81 described later is provided.

  The slide frame 12 of the pile press-in and pull-out machine is directly and slidably attached to the reaction force pedestal 70 having such a configuration. That is, as shown in FIGS. 24 and 25, both sides of the slide frame 12 of the pile press-in and pull-out machine enter the guides 74a and 74b of the attachment portion 74, whereby the slide frame 12 is attached to the attachment portion 74. The force mount 70 is slidably mounted in the front-rear direction. The end of the cylinder rod 82 of the cylinder 81 fixed to the slide frame 12 is fixed to the fixing member 75 of the mounting portion 74. By this, the slide frame 12 slides in the back and forth direction, that is, as shown by the reciprocation arrow in FIG. 25 by the expansion and contraction operation of the cylinder rod 82 of the cylinder 81, thereby moving the leader mast 13 in the front and back direction. Is possible.

  Even if the reaction frame 70 having such a configuration and the pile press-in / out machine having a configuration in which the clamps 11 and 42 and the saddle 10 are omitted in the pile press-in / out machines 1 and 41 described above, The machine can be self-propelled on site, and the above-described construction method of pressing the piles apart from each other can be easily implemented.

  In the embodiment described above, the roller 31 and the anchor device 61 are separately provided, but of course, both the roller 31 and the anchor device 61 may be provided. Further, they may be separately provided on either the reaction frame side or the pile press-in / out machine side, or may be provided on either the reaction frame side or the pile press-in / out machine side.

  The present invention is useful when pressing piles into the ground separately.

DESCRIPTION OF SYMBOLS 1, 41 pile press-in and pull-out machine 10 saddle 11, 42 clamp 12 slide frame 13 leader mast 14 chuck frame 15 chuck 16 main cylinder 20, 70 reaction frame 21 fixing | fixed part 22 base 23, 24, 72, 73 side frame 23a, 24a Weight part 74 Mounting part 75 Fixing member 81 Cylinder 82 Cylinder rod P Steel pipe pile S Steel sheet pile SF Collar U Steel sheet pile

Claims (11)

A reaction force stand for receiving a reaction force when pressing a pile into the ground with a pile press-in and pull-out machine, a leader mast movable horizontally relative to the reaction force stand, and an elevator movable up and down relative to the leader mast It is a pile press-in method using a pile press-in / out machine equipped with a supported chuck for holding a pile,
An operation of holding the entry support member with the chuck and fixing the reaction support frame installed on the ground and the pile press-in and pull-out machine to lower the chuck to enter the entry support member into the ground;
Thereafter, instead of the approach support member entering the ground, the support mast obtained from the approach support member is used as a reaction force to the chuck which grips the approach support member, the leader mast and the reaction support frame. Moving up together
Thereafter, in a state in which the approach support member is gripped by the chuck, an operation of moving the reaction force support frame horizontally with respect to the reader mast;
Thereafter, the leader mast and the reaction frame are integrally lowered with respect to the chuck, and then the chuck is raised to withdraw the entry support member from the ground, and then the leader mast and the chuck are Have the action of moving horizontally with respect to the force cradle,
By repeating the series of operations once or a plurality of times, after moving the pile press-in and pull-out machine and the reaction frame to a predetermined position, the gripping of the chuck on the entry support member is released and the chuck A pile press-in method characterized by holding a pile and pressing it into the ground. A member is provided on the entrance support member for preventing the entrance support member from entering the ground while the entrance support member enters the ground, and the entrance support member is stopped from entering the ground. The pile press-in method according to claim 1. A reaction force stand for receiving a reaction force when pressing a pile into the ground with a pile press-in and pull-out machine, a leader mast movable horizontally relative to the reaction force stand, and an elevator movable up and down relative to the leader mast It is a pile press-in method using a pile press-in / out machine equipped with a supported chuck for holding a pile,
An operation of holding the installation support member by the chuck with the reaction support frame installed on the ground fixed to the pile press-in and pull-out machine, and lowering the chuck to install the installation support member on the ground;
Thereafter, using the supporting force of the installation support member as a reaction force, an operation of integrally raising the reader mast and the reaction frame relative to the chuck holding the installation support member;
Thereafter, in a state where the installation support member is gripped by the chuck, an operation of moving the reaction force rack horizontally with respect to the reader mast;
Thereafter, after the leader mast and the reaction frame are integrally lowered with respect to the chuck, the chuck is raised to lift the installation support member.
And then moving the leader mast and the chuck horizontally with respect to the reaction rack.
By repeating the series of operations once or a plurality of times, after moving the pile press-in and pull-out machine and the reaction frame to a predetermined position, the gripping of the chuck on the installation support member is released and the chuck A pile press-in method characterized by holding a pile and pressing it into the ground. The base part of the said leader mast is slidably provided in the saddle which supports the said leader mast, The said saddle is fixed to the said reaction-forces stand, It is characterized by the above-mentioned. Pile pressing method described in. The pile press-fit method according to any one of claims 1 to 3, wherein the base portion of the leader mast is directly provided slidably on the reaction force frame. It is a reaction-force stand used for the pile press-in construction method as described in any one of Claims 1-5, Comprising:
The reaction force carrier, wherein the reaction force carrier has a roller interposed between the ground and the reaction force carrier when integrally rising with the leader mast. A pile press-in and draw-out machine used in the pile press-in method according to any one of claims 1 to 5,
The pile press-fit pull-out machine according to claim 1, wherein the pile press-fit pull-out machine has a roller interposed between the ground and the pile press-fit pull-out machine when the leader mast ascends integrally with the reaction rack. It is a reaction force mount frame used for the pile press-in construction method as described in any one of Claims 1-5, or the reaction force mount frame as described in Claim 6,
The center of gravity of the reaction rack is located in front of a fixed portion of the pile press-in and pull-out machine and the reaction rack. It is a reaction force stand according to claim 8,
A reaction force mount characterized in that at least a part of a frame of the reaction force mount is rotatable laterally around a base of the reaction load mount. It is a reaction force mount frame used for the pile press-in construction method as described in any one of Claims 1-5, or the reaction force mount frame as described in any one of Claims 8-9,
A reaction force carrier characterized by comprising means for receiving on the ground side a rotational moment generated as the chuck rotates. A pile press-in / out machine used in the pile press-in method according to any one of claims 1 to 5, or a pile press-in / out machine according to claim 7.
A pile press-in and pull-out machine characterized by comprising means for receiving on the ground side a rotational moment generated as the chuck rotates.

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