JP2008255603A - Pile method for excavated pile under low head limit - Google Patents

Abstract

An object of the present invention is to provide a method for placing an underground excavation pile that can efficiently construct an excavation pile under construction conditions with a low head limit and that can be executed even under conditions that require temporary evacuation. .
A crawler-type rotary press-fitting pile driving machine 1 is provided with a guide cell 12 that is provided with an all-around rotating device 13 that grips the outer periphery of the pile body and rotates the pile body around an axis, and is movable. An auger drilling machine 2 having an auger screw 23 connected to the auger rotation driving device 22, a self-propelled crane heavy machine 3, and a predetermined length. The divided pile bodies 4, 4... And a plurality of extension screw rods 5, 5... That can be connected to the auger screw 23 are brought to the construction site, and the crawler type rotary press-fitting pile driving machine 1. While linking the auger drilling machine 2 with the auger drilling machine 2, construction of the excavated pile is performed.
[Selection] Figure 4

Description

  The present invention relates to a pile driving method capable of efficiently constructing an underground excavation pile even under a construction condition with a low head restriction and a condition where temporary evacuation is required in a timely manner.

  In the foundation construction of a building structure or a civil engineering structure, since there is a structure in the sky, a pile driving work may be forced in a narrow construction space. Various pile placing methods that enable pile construction under such construction conditions with low head restrictions have been proposed.

  For example, in the following Patent Document 1, an auger that rotates and excavates soil is detachably attached to the lower end of a pile body, and the pile body is removed by a rotary press machine that grips the outer periphery of the pile body and performs rotary press-fitting. Rotating and integrally rotating the auger to excavate soil and press-fit the pile body into the soil, and after the press-fit of the pile body is completed, the auger is recovered from the pile body Proposed methods for building foundations have been proposed.

  Moreover, in the following Patent Document 2, an opening is formed in the platform, a stand pipe is installed on the ground surface, and a driving device is installed. Then, install a reverse circulation excavator with a tilt-type leader, install an enclosure with a ceiling, connect a reverse circulation hose and start excavation. A drilling method for a hole in a low head space has been proposed in which a drilling is carried out to a required depth and a predetermined depth is reached.

Further, in Patent Document 3 below, a short leader mast is provided in a crawler type heavy machine so that it can be raised and lowered, and a cylindrical rotating shaft is protruded downward slightly to a drive device provided with lifting legs by cylinders on the left and right. The drive device is raised so as to penetrate vertically, and this drive device is engaged with the leader of the leader mast so as to be movable up and down, and a grip drum formed on an excavating shaft such as an auger shaft can be locked to the inner periphery of the cylindrical rotating shaft. Excavators have been proposed. This excavator is a drive device that moves up and down the short leader mast, and feeds or lifts the excavating shaft to the ground in a scaled insect type as the cylindrical rotary shaft reciprocates up and down.
Japanese Patent Laid-Open No. 2-58626 JP 2007-39921 A Japanese Patent No. 2645976

  However, the pile placing method described in Patent Documents 1 and 2 above requires the installation of foundation concrete or the installation of an H steel frame because the rotary press-fitting machine or the reverse circulation excavator is stationary. In the case of construction conditions where temporary evacuation or the like is required in a timely manner, there is a problem that construction efficiency is remarkably lowered due to movement (evacuation) of construction equipment. Furthermore, all the soil inside the pile is in the form of muddy water, which is treated as industrial waste, so there is a problem that a muddy water treatment facility is required and industrial waste treatment costs increase.

  On the other hand, since the excavator described in Patent Document 3 uses a crawler excavator, there is an advantage that temporary retreat can be easily performed. However, since the excavator has a special structure, it has to be custom-made, and its versatility is poor. Further, since the excavated earth and sand are handled as industrial waste, a muddy water treatment facility is required, and there is a problem that industrial waste treatment costs increase.

  On the other hand, there are various types of piles, but among the pile types, there is a pile type called the medium excavation method. In this method, a pile with an auger screw inserted is built inside the pile, and after excavating and discharging with the auger, the pile is inserted to the support ground, and then cement milk is injected from the bit nozzle to the pile tip to expand. Build a bulb. According to the construction method, problems such as noise and vibration are solved, and since no stabilizing liquid is used during excavation, there is an advantage that the waste soil does not become industrial waste and the industrial waste treatment cost can be reduced.

  Therefore, the main problem of the present invention is that it is possible to efficiently construct an excavation pile under construction conditions with a low head limit, and to perform an excavation of an excavation pile that can be constructed even under conditions where temporary evacuation is required in a timely manner. It is to provide an installation method.

In order to solve the above-mentioned problem, as the present invention according to claim 1, a crawler type self-propelled heavy machine having a movable arm is used as a base machine, the guide arm is held by the movable arm, and a pile body is provided on the guide cell. As a base machine, a rotary press-fit type pile driving machine provided with an all-round rotating device that can move up and down to rotate the pile body around an axis and a crawler type self-propelled heavy machine equipped with a movable arm as a base machine, An auger drilling machine with an auger screw connected to the auger rotation drive unit, a self-propelled crane heavy machine, and a pile divided into predetermined lengths. Bring the body and a plurality of extension screw rods that can be connected to the auger screw to the construction site,
When the rotary press-fitting pile driver is positioned at the pile driving position, the pile body is suspended by the self-propelled crane heavy machine and attached to the all-around rotating device, and the ground is applied to the ground while applying rotational force to the pile body. A first step of press fitting;
A second step in which the auger screw is rotated and penetrated into the pile body by the auger drilling machine, and the pile is dug;
A third step of cutting the auger screw, connecting the screw rod for extension in the middle, and then rotating and penetrating into the pile body to dig in the pile;
The fourth step of suspending the next-stage pile body with the self-propelled crane heavy machine, connecting it to the upper part of the pile body already press-fitted into the ground, and then press-fitting into the ground while applying rotational force to the pile body with an all-around rotating device When,
The fifth step of cutting the auger screw, connecting the screw rod for extension in the middle, and performing the digging in the pile by rotating and penetrating into the pile body;
After that, by repeating the above fourth step to the fifth step, the pile body and the auger screw are sequentially extended in the ground depth direction. Provided.

  In the first aspect of the invention, the rotary press-fitting pile driving machine using a crawler type self-propelled heavy machine having a movable arm as a base machine and the crawler type self-propelled heavy machine having a movable arm as a base machine are mainly used. By linking with the auger drilling machine, the construction of the digging pile is performed.

  First, a crawler type self-propelled heavy machine with a movable arm that constitutes the rotary press-fitting pile driver can use a base machine such as a backhoe as it is, and the all-round rotating device is an off-the-shelf one. Since it can be used, it can be manufactured relatively easily. Further, the auger drilling machine can use a base machine such as a hydraulic excavator as it is for a crawler type self-propelled heavy machine having a movable arm, and an auger rotation drive device can be used as it is. It can be manufactured relatively easily. The self-propelled crane heavy machinery used as the rotary press-fitting pile driver, auger drilling machine, and auxiliary heavy machinery are all self-propelled, so they have excellent maneuverability and are efficient even under conditions where temporary evacuation is timely required. Construction is possible.

  In the construction of medium piles, the rotary press-fitting work of piles divided into predetermined lengths is shared by the rotary press-fitting pile driver, and the internal excavation work inside the piles is shared by the auger drilling machine. However, the rotary press-fitting operation while sequentially extending the pile body and the intermediate digging operation while alternately adding the screw rod for extension are repeated alternately to extend the intermediate stake pile to a predetermined depth. Even under limited construction conditions, it is possible to construct the digging pile efficiently.

As a second aspect of the present invention, a crawler type self-propelled heavy machine including a movable arm is used as a base machine, and the movable arm holds a guide cell, and the guide cell holds an outer periphery of a pile body and the pile. A rotary press-fitting pile driving machine provided with an all-around rotating device for rotating the body around the axis thereof, and an auger screw having a chuck drum on the upper side that can be gripped by the all-around rotating device; In addition, a self-propelled crane heavy machine, a pile body divided into predetermined lengths, and a plurality of extension screw rods that can be connected between the auger screws are brought to the construction site,
When the rotary press-fitting pile driver is positioned at the pile driving position, the pile body is suspended by the self-propelled crane heavy machine and attached to the all-around rotating device, and the ground is applied to the ground while applying rotational force to the pile body. A first step of press fitting;
The auger screw is suspended by the self-propelled crane heavy machine, and is mounted while gripping the chuck drum with respect to the all-round rotating device, and is rotated and penetrated into the pile body to dig a pile. Steps,
A third step of cutting the auger screw, connecting the screw rod for extension in the middle, and then rotating and penetrating into the pile body to dig in the pile;
A fourth step of suspending the next-stage pile body by the self-propelled crane heavy machine, connecting it to the top of the pile body that has been penetrated, and press-fitting into the ground while applying rotational force to the pile body by an all-around rotation device;
The fifth step of cutting the auger screw, connecting the screw rod for extension in the middle, and performing the digging in the pile by rotating and penetrating into the pile body;
After that, by repeating the above fourth step to the fifth step, the pile body and the auger screw are sequentially extended in the ground depth direction. Provided.

  According to the second aspect of the present invention, the construction of the digging pile is mainly performed by the rotary press-fitting pile driving machine using a crawler type self-propelled heavy machine having a movable arm as a base machine.

  The crawler type self-propelled heavy machine having a movable arm constituting the rotary press-fitting pile driver can use a backhoe as it is, and the all-around rotary device can be used as it is. It can be manufactured relatively easily. Further, the auger screw is improved so as to be provided with a chuck drum on the upper side that can be gripped by the all-around rotating device. Since the rotary press-fitting pile driver and the self-propelled crane heavy machinery used as construction aids are all self-propelled, they are excellent in maneuverability and can be constructed efficiently even under conditions that require temporary evacuation etc. Is possible.

  In the construction of the pile, the rotary press-in operation of the pile body divided into predetermined lengths is performed by the rotary press-in type pile driving machine, and the internal digging work inside the pile body is performed by the rotary press-in type pile driving. The auger screw is attached to the machine while gripping the chuck drum, and the pile is pierced into the pile body so as to dig the pile. Accordingly, the rotary press-fitting pile driving machine alternately repeats the rotary press-fitting operation while sequentially extending the pile body and the intermediate digging operation while sequentially adding the screw rods for extension. Because it is extended to the depth, it is possible to construct the excavated pile efficiently even under construction conditions with low head restrictions.

  As the present invention according to claim 3, if the pile body and the auger screw are sequentially extended to the predetermined depth position, the extension of the pile body and the auger screw is completed to the predetermined depth position. The low sky head according to any one of claims 1 and 2, wherein after the auger screw is lifted up and collected after the solidified bulb is jetted from the tip of the auger screw and agitated with the ground, There is provided a method for placing the digging pile under restriction.

  As described above in detail, according to the present invention, it is possible to efficiently construct an excavated pile under construction conditions with a low head limit, and because it is excellent in the mobility of the construction machine, a temporary evacuation is required in a timely manner. Even under conditions, construction can be done quickly.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First embodiment]
In the first embodiment, a crawler type self-propelled heavy machine having a movable arm is used as a base machine, and the movable arm holds a guide cell, and the guide cell holds an outer periphery of the pile body to hold the pile body. A rotary press-fitting pile driver 1 provided with an all-round rotating device that rotates around an axis of the shaft and a crawler self-propelled heavy machine having a movable arm as a base machine, and an auger rotating drive at the tip of the movable arm An auger drilling machine 2 in which an auger screw is connected to the auger rotation driving device, a self-propelled crane heavy machine 3, and pile bodies 4, 4. A plurality of extension screw rods 5, 5... That can be connected to the middle of the auger screw are used to construct the excavated pile.

  As shown in FIG. 1, the rotary press-fitting pile driving machine 1 uses a crawler type self-propelled heavy machine 10 including a movable arm 11 such as a backhoe as a base machine. The movable arm 11 holds a guide cell 12. The guide cell 12 has a leg portion 12a that is extended. As shown in FIG. 2, an all-round rotating device 13 that holds the outer periphery of the pile body and rotates the pile body 4 around the axis center using the guide cell 12 as a support body, as shown in FIG. ) To be moved up and down along the guide cell 12. When the pile body 4 is pressed into the ground while being rotated, as shown in FIG. 2, the outer periphery of the pile body 4 is gripped by the all-around rotating device 13 and rotated around the axis. However, the all-around rotating device 13 is lowered along the guide cell 12 by a hydraulic jack or the like. If it reaches the lower part, the gripping of the pile body 4 is released, and if the all-around rotating device 13 is moved upward, the outer periphery of the pile body 4 is again gripped and rotated around the axis, This is performed by repeating the operation of lowering the all-around rotating device 13 along the guide cell 12 with a hydraulic jack or the like.

  On the other hand, as shown in FIG. 3, the auger drilling machine 2 uses a crawler type self-propelled heavy machine 20 portion having a movable arm 21 such as a hydraulic excavator as a base machine, and at the tip of the movable arm 21, The auger rotation drive device 22 is held and an auger screw 23 is connected to the auger rotation drive device 22. An excavation head 24 is provided at the tip of the auger screw 23. It is desirable to use a wing expansion type in which the widening bit protrudes by rotating the excavation head 24 in the reverse direction.

  As shown in FIG. 4, the rotary press-fitting pile driving machine 1 shares the rotary press-fitting work of the pile bodies 4, 4... Divided into predetermined lengths, as shown in FIG. The internal digging work is shared by the auger drilling machine 2. Then, the rotary excavation work while sequentially extending the pile bodies 4, 4... And the intermediate excavation work while sequentially adding the screw rods 5, 5. I will extend it.

Hereinafter, the construction procedure will be described with reference to the procedure diagrams shown in FIGS.
(Step 1)
As shown in FIG. 5 (A), when the rotary press-fitting pile driving machine 1 is positioned at the pile driving position, the self-propelled crane heavy machine 3 hangs the pile body 4 and turns it all around. After being attached to 13, as shown in FIG. 5 (B), the pile body 4 is pressed into the ground while applying a rotational force.

(Step 2)
As shown in FIG. 5C, the auger drilling machine 2 rotates the auger screw 23 into the pile body 4 to dig up the pile.

(Step 3)
As shown in FIG. 5D, after the rod of the auger screw 23 is cut off and the extension screw rod 5 is connected to the middle, the rod is rotated into the pile body and the pile is dug.

(Step 4)
As shown in FIG. 5 (E), if the next-stage pile body 4 is suspended by the self-propelled crane heavy machine 3 and is firmly connected to the upper portion of the press-fitted pile body 4 by welding or the like, FIG. As shown in (F), the entire circumference rotating device 13 is pressed into the ground while applying a rotational force to the pile body 4.

(Step 5)
As shown in FIG. 6 (G), after the rod of the auger screw 23 is cut off and the extension screw rod 5 is connected to the middle, the rod is rotated into the pile body 4 and the pile is dug.

  After that, the pile bodies 4, 4... And the auger screws 23, 5. And if the said pile bodies 4,4 ... and the auger screw 23,5 ... have been extended to the predetermined depth position, a pile end process and collection | recovery process will be performed by the procedure of following step 6-step 10. .

(Step 6)
As shown in FIG. 6 (H), the yatco 6 is connected to the upper ends of the pile bodies 4, 4,..., And the yatco 6 is gripped by the all-around rotating device 13, so that the pile bodies 4, 4,. Press-fit into.

(Step 7)
Next, as shown in FIG. 6 (I), a screw rod 5 for extension is added and reversely rotated, so that the expansion bit is expanded and the diameter is larger than the pile body 4 to a predetermined depth. Enlarging the part.

(Step 8)
As shown in FIG. 7 (J), cement milk is sprayed from the excavation bit 24 and stirred with the surrounding ground to build the root-solidifying bulb 7, and then the auger screws 23, 5. .

(Step 9)
As shown in FIG. 7 (K), in order to secure the tip support force, the Yatco 6 is connected again and re-pressed (about 0.7 m).

(Step 10)
As shown in FIG. 7 (L), the Yatco 6 is separated and moved to the next pile driving position.

[Second embodiment]
Next, in the second embodiment shown in FIGS. 8 to 11, piles are driven by the rotary press-fitting pile driving machine 1 without using the auger drilling machine 2. That is, as shown in FIG. 8, the auger screw 8 uses a chuck drum 81 that can be gripped by the all-round rotating device 13 on the upper side, and the all-around rotating device 13. The chuck drum 81 is mounted while being gripped, and the auger screw 8 is rotated and penetrated into the pile body, so that the excavation work can be performed without using the auger drilling machine 2. . The chuck drum 81 preferably has substantially the same diameter as the pile body 4, and the screw rod portion including the chuck drum 81 can be separated. Reference numeral 80 denotes a swivel, and an excavation head 83 is provided at the tip.

Hereinafter, the construction procedure will be described with reference to the procedure diagrams shown in FIGS.
(Step 1)
As shown in FIG. 9 (A), when the rotary press-fitting pile driving machine 1 is positioned at the pile driving position, the pile body 4 is suspended by the self-propelled crane heavy machine 3 and the all-round rotating device. After being attached to 13, as shown in FIG. 9B, the pile body 4 is press-fitted into the ground while applying a rotational force.

(Step 2)
As shown in FIG. 9 (C), the auger screw 8 is mounted while the chucking drum 81 is gripped by the all-around rotating device 13, and the auger screw 8 is rotated and penetrated into the pile body 4. Digging piles.

(Step 3)
As shown in FIG. 9 (D), after the rod of the auger screw 8 is cut off and the extension screw rod 5 is connected to the middle, it is rotated into the pile body 4 and the pile is dug.

(Step 4)
After the screw rod portion including the chuck drum 81 of the auger screws 8, 5... Is cut, the next-stage pile body 4 is suspended by the self-propelled crane heavy machine 3 as shown in FIG. If it is firmly connected to the upper part of the press-fitted pile body 4 by welding or the like, as shown in FIG. 9 (F), it is press-fitted into the ground while applying a rotational force to the pile body 4 by the all-around rotating device 13. .

(Step 5)
As shown in FIG. 10 (G), after connecting the extension screw rod 5 and connecting the screw rod portion including the chuck drum 81, it is rotated into the pile body 4 by the all-around rotating device 13. Penetration and digging in the pile.

  After that, by repeating the fourth to fifth steps, the pile bodies 4, 4,... And the auger screws 8, 5,. When the pile bodies 4, 4,... And the auger screws 8, 5,... Have been extended to a predetermined depth position, pile end processing and recovery processing are performed according to the following steps 6 to 10.

(Step 6)
As shown in FIG. 10 (H), the yatco 6 is connected to the upper ends of the pile bodies 4, 4,..., And the yatco 6 is gripped by the all-around rotating device 13, so that the pile bodies 4, 4,. Press-fit into.

(Step 7)
Next, as shown in FIG. 10 (I), the extension screw rod 5 is connected and the screw rod portion including the chuck drum 81 is connected, and then gripped by the all-around rotating device 13 and rotated in the reverse direction. By doing so, the expanded excavation of the root-solidified portion having a diameter larger than that of the pile body 4 is performed to a predetermined depth while expanding the expansion bit.

(Step 8)
As shown in FIG. 11 (J), cement milk is sprayed from the excavation head 83 and agitated with the surrounding ground to build the root-fixing bulb 7, and then the auger screws 8, 5,. .

(Step 9)
As shown in FIG. 11 (K), in order to secure the tip support force, the Yatco 6 is connected again and re-pressed (about 0.7 m).

(Step 10)
As shown in FIG. 11 (L), the Yatco 6 is separated and moved to the next pile driving position.

[Other examples]
(1) The method for placing an underground stake according to the present invention is the most suitable method under conditions where construction conditions with low head restrictions and temporary evacuation are required in a timely manner. Even if there is no, it is possible to apply.

It is a side view of the rotary press-fitting type pile driving machine 1 used in the first embodiment and the second embodiment. It is a raising / lowering state figure of the perimeter rotation apparatus 13 by the rotation press-fit type pile driving machine 1. FIG. It is a side view of the auger drilling machine 2 used by the 1st form example. It is a construction conceptual diagram of the underground excavation pile by cooperation with the rotary press-fitting type pile driving machine 1 and the auger drilling machine 2. It is a work procedure figure in the 1st form example (the 1). It is a work procedure figure in the 1st form example (the 2). It is a work procedure figure in the 1st form example (the 3). It is a side view of the auger screw 8 used by the 2nd form example. It is a work procedure figure in the 2nd form example (the 1). It is a work procedure figure in the 2nd form example (the 2). It is a work procedure figure in the 2nd form example (the 3).

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Rotary press-fitting type pile driving machine, 2 ... Auger drilling machine, 3 ... Self-propelled crane heavy machine, 4 ... Pile body, 5 ... Extension screw rod, 6 ... Yatko, 7 ... Root-fixing bulb, 8 ... Auger Screw, 12 ... Guide cell, 13 ... All-around rotating device

Claims (3)

A crawler type self-propelled heavy machine having a movable arm is used as a base machine, and the movable arm holds the guide cell, and the guide cell holds the outer periphery of the pile body and rotates the pile body around the axis. Using a rotary press-fitting pile driver with a circumferential rotary device that can be moved up and down and a crawler self-propelled heavy machine with a movable arm as a base machine, an auger rotation drive device is held at the tip of the movable arm, and this auger An auger drilling machine to which an auger screw is connected to a rotary drive device, a self-propelled crane heavy machine, a pile body divided into predetermined lengths, and a plurality of extension units that can be connected to the auger screw. Bring the screw rod to the construction site,
When the rotary press-fitting pile driver is positioned at the pile driving position, the pile body is suspended by the self-propelled crane heavy machine and attached to the all-around rotating device, and the ground is applied to the ground while applying rotational force to the pile body. A first step of press fitting;
A second step in which the auger screw is rotated and penetrated into the pile body by the auger drilling machine, and the pile is dug;
A third step of cutting the auger screw, connecting the screw rod for extension in the middle, and then rotating and penetrating into the pile body to dig in the pile;
The fourth step of suspending the next-stage pile body with the self-propelled crane heavy machine, connecting it to the upper part of the pile body already press-fitted into the ground, and then press-fitting into the ground while applying rotational force to the pile body with an all-around rotating device When,
The fifth step of cutting the auger screw, connecting the screw rod for extension in the middle, and performing the digging in the pile by rotating and penetrating into the pile body;
Thereafter, by repeating the fourth step to the fifth step, the pile body and the auger screw are sequentially extended in the ground depth direction, and the method for placing the medium excavation pile under the low head restriction is characterized. A crawler type self-propelled heavy machine having a movable arm is used as a base machine, and the movable arm holds the guide cell, and the guide cell holds the outer periphery of the pile body and rotates the pile body around the axis. A rotary press-fitting pile driving machine provided with a circumferential rotating device that can be raised and lowered, an auger screw having a chuck drum that can be gripped by the all-round rotating device on the upper side, a self-propelled crane heavy machine, a predetermined Bring to the construction site a pile body divided for each length and a plurality of extension screw rods that can be connected between the auger screws,
When the rotary press-fitting pile driver is positioned at the pile driving position, the pile body is suspended by the self-propelled crane heavy machine and attached to the all-around rotating device, and the ground is applied to the ground while applying rotational force to the pile body. A first step of press fitting;
The auger screw is suspended by the self-propelled crane heavy machine, and is mounted while gripping the chuck drum with respect to the all-round rotating device, and is rotated and penetrated into the pile body to dig a pile. Steps,
A third step of cutting the auger screw, connecting the screw rod for extension in the middle, and then rotating and penetrating into the pile body to dig in the pile;
A fourth step of suspending the next-stage pile body by the self-propelled crane heavy machine, connecting it to the top of the pile body that has been penetrated, and press-fitting into the ground while applying rotational force to the pile body by an all-around rotation device;
The fifth step of cutting the auger screw, connecting the screw rod for extension in the middle, and performing the digging in the pile by rotating and penetrating into the pile body;
Thereafter, by repeating the fourth step to the fifth step, the pile body and the auger screw are sequentially extended in the ground depth direction, and the method for placing the medium excavation pile under the low head restriction is characterized.   After the pile body and the auger screw have been extended to a predetermined depth position, a solidified bulb is built from the tip of the auger screw and stirred with the ground. The method for placing an excavated pile under low head restriction according to claim 1, wherein the screw is pulled up and collected.

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