JP6043378B2 - Conduit pulling device, conduit pulling method and pile driving method - Google Patents

Description

  The present invention relates to a conduit pulling device, a conduit pulling method, and a pile driving method for attaching and pulling a conduit from a pile piled up by using a fluid jet and a vibro hammer.

  In a pile driving method using a vibro hammer, a water jet combined vibro hammer method using a water jet for vibration pollution countermeasures or driving machine performance support is known (Patent Documents 1 to 3).

  6 and 6 cont. (Continuation of FIG. 6) (a) to (i) are diagrams schematically showing each process of an example of a conventional water jet combined vibro hammer construction method.

  Fig.6 (a) is a figure which shows the state at the time of the placement start of a pile. The pile 8 is a steel pipe pile in this example. The upper end of the pile 8 is gripped by the chuck device 11 of the vibratory hammer 100. The vibratory hammer 100 has a main body 12 with a built-in vibration generator, and is suspended by a crane via a suspension rope 2. On the ground surface, a guide frame 9 made of, for example, a steel material assembled in a well beam is installed as a guide for the pile 8. In order to manage the driving depth and driving speed of the pile 8, a laser displacement meter 71 is attached to the upper part of the vibratory hammer 100, and a reflector 72 is attached to the upper surface of the guide frame 9 which is almost directly below.

  Four conduits 6 are attached to the outer periphery of the pile 8 at intervals of 90 degrees. An injection nozzle is provided at the lower end of the conduit 6, and a piping hose 62 is connected to the upper end. The piping hose 62 is connected to a water tank or a mixing plant (not shown) so as to be switched. At the start of placing, the preparation of the solidified material mainly composed of cement milk has been completed in the mixing plant, and is ready for pumping.

  FIG. 6B shows a pile driving process. Water is pumped by the piping hose 62, and the pile 8 is driven by operating the vibrator hammer 100 while jetting a high-pressure water jet W from the lower end of the conduit 6. When the tip of the pile 8 advances from the intermediate layer G1 to the support layer G2, and reaches a preset depth, it is stopped.

  6 (c) and 6 (d) show a pile root consolidation process. The fluid supplied to the conduit 6 is switched from the water jet W to the solidified material C, and the pile 8 is appropriately moved up and down within a predetermined range while injecting the solidified material C. Thereby, the root hardening part S1 is formed. At the end of the tip root hardening step, as shown in FIG. 6E, the tip of the pile 8 is positioned at the fixing depth, and the supply of the solidified material C is stopped.

  6cont. (F)-(i) is a figure which shows the raising process of the conduit | pipe 6, and the solidification material injection | pouring process to a pile surrounding surface. First, in FIG. 6F, after the pile 8 is temporarily fixed (indicated by a symbol J) to the guide frame 9 so as not to sink due to its own weight, the vibrator hammer 100 is removed.

  Next, as shown in FIG. 6cont. (G), the conduit pulling device 200 is installed. The conduit pulling device 200 is suspended from the crane by a lifting tool 203 on the upper surface of the frame 201, and includes a plurality of suspension rings 202 on the lower surface. A wire rope 4 connects the upper end of each conduit 6 and each suspension ring 202. Each wire rope 4 has an angle within about 10 degrees with respect to the vertical direction. Further, in order to manage the pulling depth and pulling speed of the conduit 6, a displacement meter mounting table 81 and a laser displacement meter 73 are attached to the upper end of the pile 8, and the lower surface of the frame 201 of the conduit pulling device 200 is opposed thereto. A reflection plate 74 is attached to the surface.

  Subsequently, as shown in FIG. 6cont. (H), the conduit pulling device 200 is pulled up by the crane. Thereby, the wire rope 4 is tensioned and the conduit 6 is detached from the pile 8 and pulled up. While pulling up the conduit 6, the pulling depth and pulling speed are managed by the laser displacement meter 73, and the solidified material C is pulled up while being injected within a predetermined range. Thereby, the solidification material C is inject | poured around the pile 8, and a circumferential surface frictional force is ensured.

  After the conduit 6 is completely pulled up as shown in FIG. 6cont. (I), the piping hose 62 is removed from the conduit 6 and the conduit 6 is cleaned. The solidified material remaining in the conduit 6 is discharged by washing. This allows the conduit 6 to be reused. Moreover, from the pile 8, the displacement meter mounting base 81 and the guide frame 9 are removed, and construction is completed.

Japanese Patent No. 2004-270157 Japanese Patent No. 2005-325513 Japanese Patent No. 2011-214340

The pulling method for collecting the conduit shown in FIG. 6cont. Has the following problems.
Since the solidified material adhering to the conduit is solidified with time, it needs to be washed within 2 hours from preparation in the mixing plant. However, as shown in FIG. 6cont., After placing the pile, it is necessary to remove the vibratory hammer, attach a separate pipe lifting device, and attach a displacement meter mounting table and a laser displacement meter to the pile. If these steps take longer than expected, it may be difficult to recover and clean the conduit before the solidified material solidifies.

  In addition, the separate pipe pulling device is pulled up and managed by a laser displacement meter different from the laser displacement meter for driving control attached to the vibratory hammer, so that there is a problem that a separate control system is necessary and complicated. .

  As another problem, since all the conduits are pulled up simultaneously as shown in FIG. 6cont. (G), the initial pulling resistance force becomes very large. For example, a force of about 2 to 5 tons per conduit is required, and a large force is required when the number of conduits is large. In addition, as described above, when the solidification of the solidified material progresses due to the time required for installation of the conduit pulling device or the like, the initial pulling resistance force of the conduit is further increased. If the initial pulling resistance of the conduit is too large, there will be a problem in terms of construction safety.

  The present invention aims to solve the above-described problems, and a conduit pulling device and a conduit pulling device capable of quickly pulling up a conduit from a pile placed in a water hammer combined vibro hammer construction method with a relatively small force. It aims at providing a method and a driving method of a pile.

  In order to achieve the above object, the present invention provides the following configuration. The numbers in parentheses are reference numerals of the drawings described later, and are attached for reference.

The first aspect of the present invention is that a plurality of conduits (6A, 6B) are constructed from a pile (8) that is provided with a plurality of conduits for fluid ejection (6A, 6B, 6C) and is driven by using both fluid ejection and a vibro hammer. , 6C), a conduit lifting device for lifting and lifting,
A plurality of conduit side connecting portions (5) provided at the upper ends of the plurality of conduits (6A, 6B, 6C);
A plurality of vibratory hammer side connecting portions (3A, 3B) provided on the vibratory hammer (1);
A plurality of flexible wire members (4) respectively connected between each of the plurality of conduit side connection portions (5) and each of the plurality of vibro hammer side connection portions (3A, 3B),
The plurality of conduits (6A, 6B, 6C) are divided into one or a plurality of sets, and the flexible wire (4) includes the chuck device (11) of the vibrator hammer (1). In a state of gripping (8), each set of the plurality of conduits (6A, 6B, 6C) is connected with a predetermined slack,
The predetermined slackness may be caused when the chuck device (11) is released and the vibratory hammer (1) is pulled up, and the vibratory hammer (1) has a different height for each set of the plurality of conduits (6A, 6B, 6C). Now, the flexible wire (4) is set so as to be tensioned.

  In the first aspect, a flat adapter (3) inserted and fixed between the body (12) of the vibrator hammer (1) and the chuck device (11) is provided, and at least a part of the vibrator hammer side connecting portion ( 3A) is formed on the periphery of the adapter (3).

  Said 1st aspect WHEREIN: At least one part (3B) of the said vibro hammer side connection part is formed on the chuck | zipper apparatus (11) of the said vibro hammer (1), It is characterized by the above-mentioned.

  In the first aspect, a laser displacement meter (71) attached to the vibratory hammer (1) is used to pull up the plurality of conduits (6A, 6B, 6C) for the management of the driving situation of the pile (8). It is also used for situation management.

According to a second aspect of the present invention, a plurality of conduits (6A, 6B) are formed from a pile (8) which is provided with a plurality of conduits (6A, 6B, 6C) for fluid ejection and is placed using both fluid ejection and a vibro hammer. , 6C) to pull up and pull up the conduit,
Dividing the plurality of conduits (6A, 6B, 6C) into a plurality of sets of one or more;
In a state where the chuck device (11) of the vibratory hammer (1) grips the pile (8), a plurality of conduit side connection portions (5 provided at the upper ends of the plurality of conduits (6A, 6B, 6C) ) And a plurality of vibratory hammer side connecting portions (3A, 3B) provided on the vibratory hammer (1) with a predetermined slack for each set of the plurality of conduits (6A, 6B, 6C). Connecting each with a flexible wire (4);
Releasing the chuck device (11) of the vibratory hammer (1) and starting pulling up the vibratory hammer (1);
While pulling up the vibro hammer (1), the flexible wire (4) is tensioned at different heights of the vibro hammer (1) for each set of the plurality of conduits (6A, 6B, 6C), and the pile Detaching and pulling up the conduits (6A, 6B, 6C).

  In the second aspect, while each of the plurality of conduits (6A, 6B, 6C) is pulled up, a solidified material (6A, 6B, 6C) is solidified from each conduit (6A, 6B, 6C) within a predetermined height range of the vibratory hammer (1). C) is further injected.

  In the second aspect, the plurality of conduits (6A, 6B, 6C) are used by using a laser displacement meter (71) attached to the vibro hammer (1) for management of the driving situation of the pile (8). The method further includes a step of managing the pulling status of the.

A third aspect of the present invention is a pile driving method, in which a pile (8) having a plurality of fluid injection pipes (6A, 6B, 6C) attached thereto is used in combination with fluid injection and a vibrator hammer (1). And the process of placing
Using the conduit pulling method according to any one of claims 5 to 7, and separating and pulling up the plurality of conduits (6A, 6B, 6C) from the pile (8).

  In the conduit pulling device and conduit pulling method of the present invention, after placing the pile, each conduit and the vibro hammer are connected by a flexible wire, and the vibrator is released from the pile by lifting the vibro hammer released. Can be pulled up. The conventional process of replacing the vibratory hammer with a separate conduit pulling device is not required, so the time required for pulling the conduit can be shortened and the conduit can be collected and washed before the solidified material solidifies. .

  Also, by dividing the plurality of conduits attached to the pile into a plurality of groups and giving the flexible wire rod a predetermined slack for each group, when the vibrator hammer is pulled up, each group has a different height of the vibrator hammer. The flexible wire can be tensioned and exert a tensile force only on the conduits belonging to the set. As a result, each set of conduits is sequentially pulled away from the pile and pulled up. As a result, the initial pulling resistance force of the plurality of conduits can be reduced, so that the conduits can be reliably and safely lifted.

  In addition, since the laser displacement meter for managing the placement status of the vibrator hammer can be used as it is for managing the conduit pulling status, the control system can be simplified as compared with the conventional case.

FIG. 1 is a (a) front view and (b) side view schematically showing a vibratory hammer configured for use with a conduit pulling device according to the present invention. FIG. 2: has shown (a) top view, (b) front view, and (c) II sectional drawing of the adapter of a conduit | pipe pulling apparatus. FIGS. 3A and 3B are views showing a connection state of the conduit and the vibro hammer by the conduit lifting device, where FIG. 3A is a front view and FIG. 3B is a cross-sectional view of the pile. (C) And (d) is the cross-sectional view of the pile which showed another example of the attachment method to the pile of a conduit | pipe. FIG. 4 is a diagram for explaining the principle of the conduit pulling method according to the present invention. FIG. 5 is a diagram schematically showing each process of an example of a water jet combined vibro hammer construction method to which the conduit pulling apparatus and method according to the present invention are applied. FIG. 5cont. Is a continuation of FIG. FIG. 6 is a diagram schematically showing each process of an example of a conventional water jet combined vibro hammer construction method. FIG. 6cont. Is a continuation of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is suitably applied to a water jet combined vibro hammer construction method. After placing a pile attached with a fluid jet conduit by using a water jet combined vibro hammer construction method, the conduit is detached from the pile using the conduit pulling device and the conduit pulling method according to the present invention. Pull up. The pile in the present invention includes any pile to which the water jet combined vibro hammer construction method is applied, such as a steel pipe pile and a steel sheet pile.

  FIG. 1 is a (a) front view and (b) side view schematically showing a vibratory hammer incorporating a conduit pulling device according to the present invention.

  As a general configuration, the vibratory hammer 1 includes a chuck device 11 for gripping a pile at a lower part, a vibratory hammer main body 12 incorporating a vibration generator at a central part, and a suspension part 13 at an upper part via a cushioning material. The suspension wire 2 is attached to a suspension tool on the upper surface of the suspension portion 13 and is suspended by a crane. The chuck device 11 includes a gripping claw 11b including a fixed claw and a movable claw, and a plurality of ribs 11c below the chuck device main body 11a. The plurality of ribs 11c are reinforcing plate members arranged at appropriate intervals, and are fixed perpendicularly to the lower surface of the chuck device main body 11a and the front surface or the rear surface of the gripping claws 11b.

  As will be described later, the conduit pulling device has a flexible wire connecting the conduit attached to the pile and the vibratory hammer, and the vibratory hammer 1 is connected to the vibratory hammer side for attaching the upper end of the flexible wire. Parts are provided. One of the vibro hammer side connecting portions is a plate piece 3 </ b> A having a plurality of holes formed in the adapter 3 inserted and fixed between the chuck device 11 and the vibro hammer main body 12. The plate pieces 3A with holes protrude from the front side and the back side of the vibro hammer 1, respectively. These plate pieces 3A with a hole are used for the connection with the conduit located near the front or back of the pile. This is because, when the flexible wire is tensioned when the conduit is pulled up, it is preferable that the direction becomes substantially vertical (an angle within about 10 degrees with respect to the vertical direction).

  Here, since the adapter 3 is located on the chuck device main body 11a, the portion protruding in the left-right direction of the chuck device main body 11a is obstructed when trying to connect the conduit located near the left and right side surfaces of the pile with the flexible wire. It becomes. For this purpose, a suspension ring 3B is provided on a plurality of ribs 11c located under the chuck device main body 11a as another vibro hammer side connecting portion. These suspension rings 3B are used for connection with a conduit located near the left and right side surfaces of the pile.

  FIG. 2 shows (a) a plan view, (b) a front view, and (c) a II cross-sectional view of the adapter 3. Since the adapter 3 has a substantially flat plate shape, it can be easily inserted and fixed between the chuck device of the existing vibratory hammer and the vibratory hammer body. In the illustrated adapter 3, a plurality of bolt holes 32 for attaching a vibro hammer are formed in an annular flat plate 31. From the front side and the back side of the periphery of the annular flat plate 31, three vertically oriented plate pieces 3A project in the radial direction. A through hole 3A1 is formed in the plate pieces 3A with holes. The number of plate pieces 3A with holes is not limited to this example.

  FIGS. 3A and 3B are views showing a connection state of the conduit and the vibro hammer by the conduit lifting device, where FIG. 3A is a front view and FIG. 3B is a cross-sectional view of the pile. (C) And (d) is the cross-sectional view of the pile which showed another example of the attachment method to the pile of a conduit | pipe.

  In the example shown in FIGS. 3 (a) and 3 (b), a total of four conduits are attached every 90 degrees on the outer periphery of a pile 8 which is a steel pipe. The conduit may be attached on the inner periphery of the pile, or may be attached on both the outer periphery and the inner periphery. The number of conduits and the arrangement in the circumferential direction are appropriately selected depending on the construction conditions.

  In the conduit pulling method according to the present invention, instead of simultaneously pulling up the plurality of conduits attached to the pile 8, it is divided into a plurality of sets and sequentially pulled up for each set. For this purpose, the plurality of conduits attached to the pile 8 are divided into a plurality of groups in advance. Each set includes one or more conduits. In the example of FIGS. 3 (a) and 3 (b), it is divided into a first set consisting of two conduits 6A on the left and right side surfaces and a second set consisting of two conduits 6B on the front and back sides.

  In the example of FIG. 3 (c), a total of six conduits mounted every 60 degrees are divided into a first set of two conduits 6A and a second set of two conduits 6B. This is divided into a third set of two conduits 6C. Further, in the example of FIG. 3D, a total of 12 conduits attached every 30 degrees are divided into a first set of four conduits 6A and a second set of four conduits 6B. And a third set of four conduits 6C. Since the conduits belonging to the same set are pulled up at the same time, the plurality of conduits belonging to the same set are preferably arranged symmetrically with respect to the center of the pile. Also, the number of conduits in each group may be different. For example, when there are five conduits in total, the first group is two, the second group is three, and the like.

  A schematic configuration of each conduit will be described with reference to the left conduit 6A in FIG. A pipe body 61 of the conduit is arranged along the length direction of the pile 8, and a conduit fixing portion 64 that is fixed to the pile using metal fittings or welding is formed at an appropriate location. The fixing strength of the conduit fixing portion 64 is set such that the conduit can be detached from the pile 8 by the conduit pulling device. The lower end of the pipe body 61 is located in the vicinity of the lower end of the pile 8, and an injection nozzle 63 is provided. A flexible piping hose 62 is connected to the upper end of the conduit via an appropriate connector. During the placement of the pile 8, water or a solidified material is supplied by the piping hose 62. At the upper end of the conduit, a conduit-side connecting portion 5 for connecting the lower end of the flexible wire 4 is provided. The conduit side connecting portion 5 is, for example, a hanging ring.

  The flexible wire 4 is, for example, a wire rope or a chain. The flexible wire 4 is a material that has the strength to withstand the tension when the conduit is pulled up, and can be freely deformed and slackened. As shown in FIG. 3A, the lower end of the flexible wire 4 is connected to the conduit side connecting portion 5, and the upper end is connected to the vibrator hammer side connecting portion 3A or 3B. The conduit side connecting portion 5 and the vibro hammer side connecting portions 3A and 3B, which are connected by the single flexible wire 4, are positioned substantially on the vertical line.

  The upper end of the flexible wire 4 of the conduit 6 </ b> B on the front side (same on the back side) of the pile 8 is connected to the vibrator hammer side connecting portion 3 </ b> A of the adapter 3. The upper ends of the flexible wires 4 of the conduit 6 </ b> A on the left and right side surfaces of the pile 8 are connected to a vibrator hammer side connecting portion 3 </ b> B provided on the rib 11 c of the chuck device 11.

  FIG. 3A shows a state in which the chuck device 11 of the vibrator hammer 1 grips the upper end of the pile 8. In this state, each flexible wire 4 is connected to each set of a plurality of conduits with a predetermined slack. That is, the two flexible wires 4 connected to the first set of conduits 6A have the same slack, and the two flexible wires 4 connected to the second set of conduits 6B are It has a slack that is different from those of the pair.

  FIG. 4 is a diagram for explaining the principle of the conduit pulling method according to the present invention. In FIG. 4, it demonstrates using the example which attached the six conduits shown in FIG.3 (c) to the pile. The plurality of conduits are divided into a first set of two conduits 6A, a second set of two conduits 6B, and a third set of two conduits 6C. (For simplification, in FIG. 4, illustration of two conduits on the back side of the pile and its flexible wire is omitted.)

  FIG. 4A shows a state where the chuck device 11 of the vibrator hammer 1 is gripping the upper end of the pile 8 after the pile 8 is placed. In this state, the flexible wire 4 is attached. Between each of the six pipes divided into two, three each, between the conduit side connecting part 5 and the vibro hammer side connecting parts 3A, 3B so that the flexible wire 4 has a different predetermined slack. Each is connected by a flexible wire 4 having a predetermined length.

  Subsequently, the chuck device 11 is released, the vibratory hammer 1 is separated from the pile 8, and the lifting of the vibratory hammer 1 is started.

  FIG. 4B shows a state in which the vibratory hammer 1 is at a height raised by Δh1 from the initial position. At this height, first, the flexible wire 4 (the length is indicated by L1) connected to the first set of conduits 6A is tensioned. At this time, the flexible wire 4 connected to the second set of conduits 6B and the third set of conduits 6C is still loose. When the vibratory hammer 1 is further pulled up from this height, the first set of conduits 6 </ b> A is pulled away from the pile 8 and begins to be pulled up together with the vibratory hammer 1.

  FIG. 4C shows a state where the vibratory hammer 1 is at a height that is raised by Δh2 from the height of FIG. 4B. Δh2 may be, for example, about 30 cm to 100 cm, but is not limited to this range. The first set of conduits 6A is pulled up by Δh2. At this height, the flexible wire 4 (indicated by length L2) connected to the second set of conduits 6B is tensioned. At this time, the flexible wire 4 connected to the third set of conduits 6C is still loose. When the vibratory hammer 1 is further pulled up from this height, the second set of conduits 6 </ b> B is pulled away from the pile 8 and begins to be pulled up together with the vibratory hammer 1.

  FIG. 4D shows a state in which the vibratory hammer 1 is at a height that is raised by Δh3 from the height of FIG. Δh3 may be, for example, about 30 cm to 100 cm, but is not limited to this range. The first set of conduits 6A is pulled up by Δh2 + Δh3, and the second set of conduits 6B is pulled up by Δh3. At this height, the flexible wire 4 (indicated by length L3) connected to the third set of conduits 6C is tensioned. When the vibratory hammer 1 is further pulled up from this height, the third set of conduits 6 </ b> C is pulled away from the pile 8 and begins to be pulled up together with the vibratory hammer 1.

  As shown in FIG. 4, in the present invention, the conventional process in which the vibratory hammer is separated from the pile and then pulled up after the pile is placed is used as the duct pulling process as it is. Therefore, the step of replacing the vibratory hammer with a separate conduit pulling device as in the prior art becomes unnecessary, and the conduit can be collected in a short time. Therefore, the conduit can be washed before the solidified material is solidified.

  As shown in FIG. 4, in the conduit pulling method according to the present invention, a plurality of conduits are divided into several groups, and each group is separated from the pile step by step at different heights while the vibratory hammer is being pulled. increase. The predetermined slack of the flexible wire is set so that the flexible wire connected to the conduit belonging to the same set is tensioned at the same height of the vibratory hammer. Compared to the conventional method in which all the conduits are detached from the pile at the same time, in the method of the present invention, the number of conduits to be simultaneously detached is reduced, so that the initial pulling resistance force can be greatly reduced.

  5 and 5 cont. (Continuation of FIG. 5) (a) to (j) are diagrams schematically showing respective steps of an example of a water jet combined vibro hammer construction method to which the conduit pulling apparatus and method according to the present invention are applied. is there.

  5 (a) to 5 (e) are the same as FIG. 6 except that the vibratory hammer 1 of the present invention is used in place of the vibratory hammer 100 in the conventional method of FIGS. 6 (a) to (e) described above. Pile 8 is driven. That is, in FIG. 5A, preparation before placing is performed, in FIG. 5B, a pile is driven by using a high-pressure water jet W and a vibro hammer together, and in FIG. 5C and FIG. The tip is solidified by spraying, and in (e), the pile is positioned at the fixing depth. The process so far is not different from the conventional method shown in FIG.

  5 cont. (F) to (j) are diagrams showing the steps of pulling up the conduits 6A and 6B and injecting the solidified material into the pile peripheral surface. First, in FIG. 5cont. (F), after the pile 8 is temporarily fixed (indicated by a symbol J) to the guide frame 9 so as not to sink or tilt due to its own weight, as shown in FIG. 3 (a) described above, The flexible wire 4 is attached between the conduits 6A and 6B and the vibro hammer 1. The lower end of the flexible wire 4 is connected to the conduit side connecting portion 5 and the upper end is connected to the vibrator hammer side connecting portion 3A or 3B. Thereafter, the chuck device 11 is released, and the pulling up of the vibrator hammer 1 is started.

  At the height of the vibratory hammer 1 shown in FIG. 5cont. (G), the flexible wire 4 connected to the first set of conduits 6A is tensioned. Further, by pulling up the vibrator hammer 1, the conduit 6 </ b> A is detached from the pile 8 and pulled up together with the vibrator hammer 1.

  At the height of the vibratory hammer 1 shown in FIG. 5cont. (H), the flexible wire 4 connected to the second set of conduits 6B is tensed. Further, by pulling up the vibrator hammer 1, the conduit 6 </ b> B is detached from the pile 8 and pulled up together with the vibrator hammer 1.

  As shown in FIG. 5cont. (I), the pulling state (the pulling height and the pulling speed) of the vibrator hammer 1 is attached to the guide frame 9 directly below the laser displacement meter 71 attached to the suspension part of the vibrator hammer 1. It can be managed by the reflector 72. Based on the pulling height and pulling speed of the vibratory hammer 1 detected by the laser displacement meter 71, the length of each flexible wire 4, and the length of each conduit 6A, 6B (the pulling status of each conduit 6A, 6B ( The pulling depth and the pulling speed can be calculated. That is, the position and speed of the injection nozzle at the lower end of each conduit 6A, 6B can be obtained. Thus, the solidified material C is filled around the pile 8 by injecting a predetermined amount of the solidified material C in a predetermined height range of the vibrator hammer 1, that is, in a predetermined lifting depth range in each of the conduits 6A and 6B. To do. Thereby, the peripheral surface frictional force of the pile 8 is ensured.

  The laser displacement meter 71 and the reflecting plate 72 are used for managing the driving situation (the driving depth and the driving speed) in the pile driving process shown in FIGS. 5 (a) to 5 (e). Can also be used. Therefore, it is possible to perform conduit pulling management by the same control system as pile driving management.

  After the conduits 6A and 6B are completely pulled up as shown in FIG. 6cont. (J), the pipe hose 62 is removed from the conduits 6A and 6B, the conduits 6A and 6B are washed, and the remaining solidified material is discharged. As a result, the conduits 6A and 6B can be reused. Finally, the guide frame 9 is removed to complete the construction.

DESCRIPTION OF SYMBOLS 1 Vibro hammer 11 Chuck apparatus 11a Chuck apparatus main body 11b Holding claw 11c Rib 12 Vibro hammer main body 13 Hanging part 2 Hanging wire 3 Adapter 3A, 3B Vibro hammer side connection part 4 Flexible wire (wire rope)
5 Conduit side connection part 6, 6A, 6B, 6C Conduit 61 Pipe body 62 Piping hose 63 Injection nozzle 64 Conduit fixing part
71, 73 Laser displacement meter 72, 74 Reflector plate 8 Pile 81 Displacement meter mounting table 9 Guide frame 100 Vibro hammer (conventional)
200 Conduit pulling device (conventional)

Claims (8)

To detach and pull up the multiple pipes (6A, 6B, 6C) from the pile (8) that has been installed using fluid jets and vibro hammers by installing multiple pipes (6A, 6B, 6C) for fluid injection A conduit lifting device,
A plurality of conduit side connecting portions (5) provided at the upper ends of the plurality of conduits (6A, 6B, 6C);
A plurality of vibratory hammer side connecting portions (3A, 3B) provided on the vibratory hammer (1);
A plurality of flexible wire members (4) respectively connected between each of the plurality of conduit side connection portions (5) and each of the plurality of vibro hammer side connection portions (3A, 3B),
The plurality of conduits (6A, 6B, 6C) are divided into one or a plurality of sets, and the flexible wire (4) includes the chuck device (11) of the vibrator hammer (1). In a state of gripping (8), each set of the plurality of conduits (6A, 6B, 6C) is connected with a predetermined slack,
The predetermined slackness may be caused when the chuck device (11) is released and the vibratory hammer (1) is pulled up, and the vibratory hammer (1) has a different height for each set of the plurality of conduits (6A, 6B, 6C). The conduit pulling device is characterized in that the flexible wire (4) is set to be tensioned. A plate-shaped adapter (3) inserted and fixed between the body (12) of the vibrator hammer (1) and the chuck device (11) is provided, and at least a part (3A) of the vibrator hammer side connecting portion is connected to the adapter (3 The conduit pulling device according to claim 1, wherein the conduit pulling device is formed at a peripheral edge of The conduit pulling device according to claim 1 or 2, wherein at least a part (3B) of the vibro hammer side connecting portion is formed on a chuck device (11) of the vibro hammer (1).   A laser displacement meter (71) attached to the vibratory hammer (1) is used for managing the pulling status of the plurality of conduits (6A, 6B, 6C). The conduit pulling device according to any one of claims 1 to 3. To detach and pull up the multiple pipes (6A, 6B, 6C) from the pile (8) that has been installed using fluid jets and vibro hammers by installing multiple pipes (6A, 6B, 6C) for fluid injection A conduit pulling method of
Dividing the plurality of conduits (6A, 6B, 6C) into a plurality of sets of one or more;
In a state where the chuck device (11) of the vibratory hammer (1) grips the pile (8), a plurality of conduit side connection portions (5 provided at the upper ends of the plurality of conduits (6A, 6B, 6C) ) And a plurality of vibratory hammer side connecting portions (3A, 3B) provided on the vibratory hammer (1) with a predetermined slack for each set of the plurality of conduits (6A, 6B, 6C). Connecting each with a flexible wire (4);
Releasing the chuck device (11) of the vibratory hammer (1) and starting pulling up the vibratory hammer (1);
While pulling up the vibro hammer (1), the flexible wire (4) is tensioned at different heights of the vibro hammer (1) for each set of the plurality of conduits (6A, 6B, 6C), and the pile Removing the pipe (6A, 6B, 6C) from the pipe and pulling it up.   A step of injecting the solidified material (C) from each conduit (6A, 6B, 6C) in a predetermined height range of the vibratory hammer (1) while pulling up each of the plurality of conduits (6A, 6B, 6C) The method of pulling up a conduit according to claim 5, further comprising:   A process of managing the pulling status of the plurality of conduits (6A, 6B, 6C) using a laser displacement meter (71) attached to the vibratory hammer (1) for managing the driving status of the pile (8) The method of pulling up a conduit according to claim 5 or 6, further comprising: Placing a pile (8) with a plurality of conduits (6A, 6B, 6C) for fluid injection, using both fluid injection and vibro hammer (1),
A pile having a step of separating and pulling up the plurality of conduits (6A, 6B, 6C) from the pile (8) using the conduit pulling method according to any one of claims 5 to 7. How to drive

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