JP5130036B2 - Pile material burying method - Google Patents

Description

  The present invention relates to a pile material burying method, and more particularly, to a pile material burying method for continuously burying a plurality of pile materials in the ground.

Conventionally, pile material is buried in the excavation hole formed in the ground using a chain cutter type excavator, and the next excavation hole is formed at a position aligned with the buried pile material to embed the pile material. The technique of burying a plurality of pile materials continuously in the ground by repeating is known (for example, refer to Patent Document 1).
JP 2007-255148 A

  However, in the case of the above-mentioned Patent Document 1, in order to form an excavation hole for each pile material to be buried, every time the excavation hole is excavated, the excavation apparatus must be pulled out from the ground and moved to the next excavation position. In other words, the burying work of the pile material becomes complicated, and there is a problem that the burying work may take time.

  An object of the present invention is to provide a pile material burying method capable of burying a pile material in the ground more efficiently.

In order to solve the above problems, the invention described in claim 1
A pile material burying method for continuously burying a plurality of pile materials in the ground using a chain cutter excavator,
The chain cutter type excavator is arranged so as to excavate a drilling hole at a position adjacent to an existing pile material already buried in the ground, and then the lower end portion of the chain cutter type excavator is used as a fulcrum. The chain cutter excavator is inclined by separating the upper end side of the chain cutter excavator from the existing pile material, and further, from between the existing pile material and the upper end side of the chain cutter excavator. By burying a new pile material in the ground along the existing pile material, the newly buried pile material pushes out the lower end portion of the chain cutter excavator and excavates the next excavation hole. It is characterized by that.

The invention according to claim 2 is the pile material burying method according to claim 1, wherein the chain cutter excavator includes a guide member that guides a new pile material into the ground along the existing pile material. And
A new pile material buried in the ground pushes the guide member, pushes the lower end of the chain cutter excavator, and newly lays the arrangement of the chain cutter excavator alongside the existing pile material The chain cutter type excavating device excavates the excavation hole by following the pile material formed.

According to the present invention, after the chain cutter excavator is arranged so as to excavate the excavation hole at a position adjacent to the existing pile material already buried in the ground, the lower end portion of the chain cutter excavator is As a fulcrum, inclining the chain cutter excavator so that the upper end side of the chain cutter excavator is separated from the existing pile material, the existing pile material and the upper end side of the chain cutter excavator are By burying a new pile material in the ground along the existing pile material, the buried pile material pushes the lower end of the chain cutter excavator forward, and the chain cutter excavator The next drilling hole can be drilled in front of.
In other words, as the pile material is buried, the chain cutter type excavator pushed by the pile material moves forward, and the next excavation hole can be excavated. Since it can be performed continuously as a series of operations, the pile material can be buried more efficiently in the ground.
And a plurality of pile materials can be continuously embed | buried in the ground by repeating a series of operation | movement with the prior excavation of a digging hole, and the embedding of a pile material.

  Hereinafter, a pile material burying method according to an embodiment of the present invention will be described with reference to the drawings. The excavator used in the pile material burying method of the present invention is a chain cutter excavator that excavates an excavation hole having a substantially rectangular cross section.

  As shown in FIG. 1, the chain cutter excavator 1 (hereinafter, excavator 1) extends in the vertical direction and is arranged on a frame post 11 having a tension adjusting cylinder 11 a and an upper end of the frame post 11. The drive sprocket 12 is rotated by the drive of a drive motor (not shown), the driven sprocket 13 is disposed at the lower end of the frame post 11, and is extended along the outer periphery of the frame post 11 by being spanned by the drive sprocket 12 and the driven sprocket 13. The chain cutter 14 is composed of an endless chain 14a and a cutter bit 14b, and a guide frame 15 that is a guide member disposed on one end face side of the frame post 11 is provided.

  Next, the pile presser 2 for supporting the excavator 1 and the pile material 50 and feeding the excavator 1 and the pile material 50 into the ground will be described.

  As shown in FIG. 2, the pile press-in machine 2 includes a saddle 22 including a plurality of (for example, four) clamp devices 21 that hold an upper end portion of a pile material 50 that is already press-fitted, and a saddle 22. On the other hand, a slide base 23 that can be moved back and forth, a leader mast 24 that can turn left and right on the slide base 23, and a chuck device that is attached to the front surface of the leader mast 24 so as to be movable up and down and holds the pile material 50 and the excavator 1. 25, a main hydraulic cylinder 26 that drives the chuck device 25 up and down with respect to the leader mast 24, a hydraulic device such as a hydraulic hose connected to the excavator 1, a power device cable 27, and the like.

The chuck device 25 in the pile press-in machine 2 includes two chuck portions 251 and 252.
One chuck portion 251 (first chuck portion 251) that is spaced apart from the leader mast 24 includes a clamp 251 a that holds the pile material 50 and the excavator 1. In the first chuck portion 251, the clamp 251a is provided so as to be slidable in the vertical direction along the long groove 251b formed in the first chuck portion 251 as shown in FIG. Note that the clamp 251a of the first chuck portion 251 can be slid along the long groove 251b and fixed in the long groove 251b by switching on / off of a predetermined lock mechanism. It has become.
Further, the other chuck portion 252 (second chuck portion 252) arranged close to the leader mast 24 includes a clamp 252 a that holds the pile material 50 and the excavating apparatus 1.

Then, the pile presser 2 repeats the lowering of the chuck device 25 holding the excavating device 1 and the lifting of the chuck device 25 by releasing the excavating device 1, so that the excavating device 1 is grounded one stroke at a time. The excavation apparatus 1 excavates the ground by repeatedly feeding it in, so that an excavation hole is formed.
Moreover, the pile press-in machine 2 repeats lowering the chuck device 25 holding the pile material 50 and releasing the pile 50 and raising the chuck device 25 to bring the pile 50 into the ground one stroke at a time. The pile 50 is press-fitted into the ground by repeating the press-fitting.
The operation of the pile press-in machine 2 is the same as that conventionally known and will not be described in detail here.

Next, a pile material burying method for burying the pile material 50 in the ground using the excavator 1 and the pile press-in machine 2 will be described. However, since the method for burying the temporary pile 5 serving as a reaction force pile is the same as that conventionally known, it will not be described in detail here. In this embodiment, the excavator 1 is used to explain the pile material burying method. In order to make it easy to understand the changes in the shape of the pile presser 2 and the pile presser 2, a drawing illustrating a state where the excavator 1 and the pile presser 2 are seen through is used.

First, as shown to Fig.3 (a), the pile presser 2 is installed on the predetermined temporary pile 5 which can take reaction force when the pile presser 2 operate | moves. In addition, since the installation method of the temporary pile 5 is the same as that of a conventionally well-known thing, it does not elaborate here.
The clamp device 21 of the pile presser 2 holds the upper end of the temporary pile 5 to stabilize the posture of the pile presser 2 (step S1).

Next, as shown in FIG. 3 (b), the excavator 1 is slid by the main hook F2 of the crane after the slide base 23 of the pile presser 2 is slightly slid forward and the chuck device 25 is raised. Is inserted into the chuck device 25, and the excavator 1 is clamped by the first chuck portion 251 (step S2).
At this time, the excavator 1 is positioned by aligning the guide groove of the guide frame 15 of the excavator 1 with the protruding portion of the temporary pile 5.

Next, as shown in FIG. 3C, the excavation device 1 held by the chuck device 25 excavates the ground for each stroke by repeatedly lowering and raising the chuck device 25 of the pile press-in machine 2. Perform (step S3).
At this time, the projecting portion of the temporary pile 5 is engaged with the guide groove of the guide frame 15 of the excavator 1, and excavation is performed while stabilizing the posture of the excavator 1 with respect to the temporary pile 5.
At this time, the lock mechanism in the first chuck portion 251 is turned on. The lock mechanism is on means that the clamp 251a is fixed so as not to slide in the long groove 251b, and the rotation mechanism of the clamp 251a is also locked.

Next, as shown in FIG. 3 (d), the lower end portion of the excavator 1 (specifically, the driven sprocket 13 side) is fed to a predetermined depth corresponding to the pile material 50 arranged continuously in the ground, and the existing The excavator 1 is arranged at a position adjacent to the temporary pile 5 so that the excavation hole is formed at a position adjacent to the temporary pile 5 (step S4). In addition, since the pile material 50 will be press-fitted into the ground by the pile press-in machine 2, the excavation by the excavator 1 does not require excavation with a soil discharge amount of 100%, and 20-30% of the remaining soil is left. As much excavation as possible is sufficient.
At this time, the main hook F2 of the crane supporting the excavator 1 is cut off. Thus, if the lower half or more of the excavator 1 is fed into the ground and the upper side of the excavator 1 is held by the chuck device 25 of the pile presser 2, the main hook F2 is supported. Even if there is no, the excavator 1 does not fall down.

Next, as shown in FIG. 4A, the holding of the temporary pile 5 by the second chuck portion 252 is released, the slide base 23 of the pile presser 2 is slid forward in the traveling direction, and the chuck device 25 is moved forward. While moving, excavating the front ground while tilting the excavating apparatus 1 sandwiched by the first chuck portion 251 in the traveling direction (step S5).
That is, the slide base 23 of the pile presser 2 is slid forward in the advancing direction and the chuck device 25 is moved forward, so that the lower end of the excavator 1 (the driven sprocket 13 side) is used as a fulcrum. The excavator 1 is inclined by separating the upper end side (drive sprocket 12 side) from the existing temporary pile 5, and when the excavator 1 is inclined in the traveling direction, the ground in front of the excavator 1 is excavated. .
At this time, the lock mechanism in the first chuck portion 251 is turned off, and the clamp 251a of the first chuck portion 251 is in a rotatable state and is slidable along the long groove 251b.

Next, as shown in FIG. 4B, the chuck device 25 is raised by a predetermined amount in a state where the excavation device 1 is sandwiched by the first chuck portion 251 of the chuck device 25 (step S6).
At this time, the excavator clamped by the first chuck unit 251 by moving relative to the chuck device 25 so that the clamp 251a in the first chuck unit 251 slides and moves to the lower part of the long groove 251b. 1 does not move, and the arrangement of the excavator 1 is hardly changed. Since the arrangement of the excavator 1 is not changed in this way, the hole wall protection of the excavation hole and the positioning when inserting the pile material 50 are facilitated.

Next, as shown in FIG. 4C, the pile material 50 suspended by the main hook F2 of the crane is inserted into the chuck device 25, and the pile material 50 is clamped by the second chuck portion 252 (step S7).
At this time, the protruding portion of the pile material 50 is aligned with the guide groove 15 c of the guide frame 15 of the excavator 1, and the pile material 50 and the excavator 1 are aligned. In addition, the pile material 50 is aligned with the existing temporary pile 5.

Next, as shown in FIG. 4D, the chuck device 25 is lowered while the pile material 50 is held by the second chuck portion 252 of the chuck device 25 (step S8).
At this time, since the clamp 251a of the first chuck portion 251 is slidable along the long groove 251b, the clamp 251a slides relative to the chuck device 25 so that the clamp 251a moves above the long groove 251b. By the contact movement, the arrangement of the excavating apparatus 1 held between the first chuck portions 251 is hardly changed.
Then, as shown in FIG. 5A, when the pile material 50 is press-fitted between the existing temporary pile 5 and the excavator 1 by further lowering the chuck device 25, the pile material 50 is caused by the component force of the press-fitting. The guide frame 15 of the excavator 1 is pushed to push the lower end portion of the excavator 1 forward in the traveling direction (step S9).
That is, the excavator 1 pushed by the pile material 50 moves the lower end portion of the excavator 1 forward so as to rotate around the clamp 251a portion.

Next, as shown in FIG. 5B, the first chuck portion 251 of the chuck device 25 supports the excavating device 1, and the second chuck portion 252 of the chuck device 25 holds the pile material 50. Thus, by repeatedly lowering and raising the chuck device 25, the pile material 50 is press-fitted into the ground by one stroke (step S10). At this time, only the clamp 251a of the first chuck portion 251 slides in the long groove 251b, and the position of the excavator 1 does not change.
The pile material 50 pushes the guide frame 15 of the excavating device 1 by the component force of the press-fitting, and the excavating device 1 pushed by the pile material 50 rotates so that the clamp 251a portion rotates about the axis. The ground is excavated while moving the lower end of the forward. And the excavation apparatus 1 approaches the attitude | position perpendicular | vertical with respect to a ground surface, excavating ahead. At this time, the lock mechanism in the first chuck portion 251 is turned off, and the clamp 251a of the first chuck portion 251 is in a rotatable state and is slidable along the long groove 251b.

And as shown in FIG.5 (c), when the pile material 50 is press-fitted about half in the ground and the pile material 50 comes to be supported by the supporting force which does not fall down, the clamp apparatus of the pile press-in machine 2 21. The upper end of the temporary pile 5 gripped by 21 is released, and the main body (clamp device 21, saddle) of the pile presser 2 is moved by lowering the chuck device 25 while the chuck device 25 holds the pile material 50 and the excavator 1. 22, the slide base 23, the leader mast 24, the reel device 27) are relatively raised, and the main body of the pile presser 2 is pulled upward by pulling the main body of the pile presser 2 toward the chuck device 25 (step) S11).
Next, as shown in FIG. 6A, the slide base 23 is slid to move the clamp device 21 of the pile press-fitting machine 2 to the chuck device 25 side (step S12).
Next, as shown in FIG. 6 (b), the chuck device 25 relatively lowers the main body of the pile press-in machine 2 by the operation of raising the chuck device 25 while sandwiching the pile material 50 and the excavation device 1. The pile press-in machine 2 is installed at the upper end of the temporary pile 5 and the upper end of the temporary pile 5 is gripped by the clamp device 21 (step S13). Thus, the pile press-in machine 2 moves forward.

Next, as illustrated in FIG. 6C, the first chuck portion 251 of the chuck device 25 supports the excavation device 1, and the second chuck portion 252 of the chuck device 25 holds the pile material 50. Thus, by repeatedly lowering and raising the chuck device 25, the pile material 50 is press-fitted into the ground for each stroke, and the pile material 50 is buried at a predetermined depth (step S14).
The main hook F <b> 2 is separated from the pile material 50 after the pile material 50 is buried.

Next, as shown in FIG. 6D, the holding of the pile material 50 by the second chuck portion 252 is released, the slide base 23 of the pile presser 2 is slid forward in the traveling direction, and the chuck device 25 is moved forward. While moving, excavating the front ground while inclining the excavating apparatus 1 sandwiched between the first chuck portions 251 in the traveling direction (step S15).
Here, when the pile material 50 is read as the temporary pile 5, it becomes the same as step S5. Therefore, the subsequent steps repeatedly perform the operation of replacing the temporary pile 5 in steps S5 to S13 with the pile material 50. By repeating this operation, a plurality of pile members 50 can be continuously embedded in the ground.
Then, by repeating the steps for the desired number of pile members 50, a wall structure formed by connecting a predetermined number of pile members 50 can be constructed.

As described above, according to the pile material burying method according to the present invention, after arranging the excavator 1 so as to excavate the excavation hole at a position adjacent to the existing pile material 50 already embedded in the ground, The excavator 1 is tilted so that the upper end side of the excavator 1 is separated from the existing pile material 50 with the lower end of the excavator 1 as a fulcrum, and the upper end side of the existing pile material 50 and the excavator 1 By pressing a new pile material 50 into the ground from between the two, the lower end portion of the excavator 1 is pushed forward so that the pressed pile material 50 pushes the guide frame 15, and the excavator 1 The next drilling hole can be drilled in front of.
In other words, as the pile material 50 is press-fitted, the next excavation hole can be excavated while the excavation device 1 pushed by the pile material 50 moves forward, so that the previous excavation of the excavation hole and the press-fitting of the pile material 50 are performed. Can be continuously performed as a series of operations, and the pile material 50 can be buried in the ground more efficiently.
A plurality of pile members 50 can be continuously buried in the ground by repeating a series of operations of the preceding excavation of the excavation hole and the press-fitting of the pile member 50, and a predetermined number of pile members 50 are continuously provided. The wall structure formed can be constructed.

  In particular, since the excavator 1 can be pushed forward by the pile material 50 to be press-fitted and move forward, the ground in front of the moving direction can be excavated. Since it is only necessary to use a device such as a pile presser 2 that can support the excavator 1 at the buried position of the pile material 50 as in the embodiment, a large and special movement drive is required to move the excavator 1. There is an advantage that it is not necessary to provide means (for example, a base machine that moves by caterpillar driving).

Moreover, according to this pile material burying method, since the pre-excavation of the excavation hole by the excavator 1 and the press-fitting of the pile material 50 can be performed continuously, until just before the pile material 50 is press-fitted into the excavation hole, Since the excavator 1 holds the hole wall surface of the excavation hole, the trouble that the hole wall surface collapses and the excavation hole collapses can be reduced.
In addition, since the pile material 50 is press-fitted into the ground by the pile press-in machine 2, it is not necessary to perform excavation with a soil removal amount of 100% in the preceding excavation by the excavator 1, so that the hole wall surface is not easily collapsed. The excavation may leave 20-30% as the remaining soil. In addition, the cross-sectional shape of the excavation hole formed by the excavator 1 is set to a minimum size so that the cross-sectional shape is smaller than the cross-sectional area of the pile material 50 so that the hole wall surface is not easily collapsed. Good.

Moreover, when the excavator 1 used in this pile material burying method is disposed at a predetermined depth corresponding to the pile material 50, the lower half or more of the excavator 1 is buried in the ground. Since the attitude is supported in the ground, it is difficult for the excavator 1 to fall down during excavation of the excavation hole, and the risk can be reduced.
Moreover, since the excavator 1 moves in a state where it is buried in the ground more than half when excavating the excavation hole having a depth corresponding to the pile material 50, the excavator 1 is piled in a state where the upper end position of the excavator 1 is lowered. Since the material embedding work can be performed, the work can be suitably performed even when there is a height restriction such as an obstacle such as an elevated above the pile material embedding work location.

  The excavator 1 is a chain cutter type excavator that circulates and drives the chain cutter 14 to excavate the ground. Since the chain cutter 14 exposed on the ground portion can be visually recognized, the chain cutter 14 It is easy to check the wear or abnormality of the cutter bit 14c (excavation claw). That is, compared with excavating equipment such as an auger apparatus in which the excavating claw (auger bit) is arranged at the lower end portion of the ground, the chain cutter type excavating apparatus 1 performs maintenance such as replacement of the cutter bit 14c (excavating claw). Even when the cutter bit 14c is replaced, it is not necessary to pull out the excavator 1 from the ground, so that excavation work can be continued easily.

  In the above embodiment, the pile material 50 is a reinforced concrete pile material, but the present invention is not limited to this. For example, the pile material made of various steel materials, steel material and reinforced concrete Thus, the pile material which consists of a composite material which combined the member of several different materials may be sufficient.

  In addition, it is needless to say that other specific detailed structures can be appropriately changed.

It is a side view which shows the excavation apparatus used for the pile material burying method which concerns on this invention. It is a side view which shows the pile press-in machine used for the pile material burying method which concerns on this invention, and shows the time (a) of a chuck apparatus fall, and the time (b) of a chuck apparatus raise. It is explanatory drawing regarding the pile material burying method which concerns on this invention, and has shown the 1st step (a), the 2nd step (b), the 3rd step (c), and the 4th step (d). It is explanatory drawing regarding the pile material burying method which concerns on this invention, and has shown the 5th step (a), the 6th step (b), the 7th step (c), and the 8th step (d). It is explanatory drawing regarding the pile material burying method which concerns on this invention, and has shown the 9th step (a), the 10th step (b), and the 11th step (c). It is explanatory drawing regarding the pile material burying method which concerns on this invention, and has shown 12th step (a), 13th step (b), 14th step (c), and 15th step (d).

Explanation of symbols

1 Excavator (Chain cutter excavator)
11 Frame post 12 Drive sprocket 13 Driven sprocket 14 Chain cutter 15 Guide frame (guide member)
2 Pile Pressing Machine 21 Clamping Device 22 Saddle 23 Slide Base 24 Leader Mast 25 Chuck Device 26 Main Hydraulic Cylinder 27 Reel Device 251 First Chuck Part 251a Clamp 251b Long Groove 252 Second Chuck Part 252a Clamp 50 Pile Material 5 Temporary Pile

Claims (2)

A pile material burying method for continuously burying a plurality of pile materials in the ground using a chain cutter excavator,
The chain cutter type excavator is arranged so as to excavate a drilling hole at a position adjacent to an existing pile material already buried in the ground, and then the lower end portion of the chain cutter type excavator is used as a fulcrum. The chain cutter excavator is inclined by separating the upper end side of the chain cutter excavator from the existing pile material, and a new pile is further formed between the existing pile material and the chain cutter excavator. By burying a material in the ground along the existing pile material, the lower end portion of the chain cutter excavator is pushed out by the newly buried pile material, and the next excavation hole is excavated. Pile material burying method. The chain cutter excavator includes a guide member for guiding a new pile material into the ground along the existing pile material,
A new pile material buried in the ground pushes the guide member and pushes out the lower end portion of the chain cutter excavator to align the arrangement of the chain cutter excavator with the newly buried pile material. The pile material embedding method according to claim 1, wherein the chain cutter excavator excavates an excavation hole.

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