JPH084000A - Method for setting pile - Google Patents

Abstract

PURPOSE:To temporaily fix piles in a safe and sure manner when the piles are connected to each other so that workability of temporarily fixing work and welding work can be improved and the work can be performed even in a relatively narrow space. CONSTITUTION:In a method for setting a pile wherein a plurality of piles 11, 12 are lowered into a pile hole 10 excavated from the upper side of the ground, while the piles 11, 12 are axially connected, thus embedding the piles in the hole, a supporting base 20 having therein a clearance S larger than the diameter of the pile 11 is prepared. The base 20 is set on the ground in such a manner that the clearance S is aligned with the pile hole 10, and in order to connect the upper pile 12 to the lower pile 11 to each other, a piece of rope 30 is wound around the pile 11 and a portion thereof is hung on a hook provided on the base 20. Thus, the lower pile 11 will be positioned halfway down the hole 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction method for placing reinforced concrete piles and steel piles, and in particular, a construction method in which a plurality of piles are buried in a drilled pile hole while sequentially connecting them vertically. The present invention relates to a method of constructing a pile that is suitable for use in.

[0002]

2. Description of the Related Art For example, in the construction of buildings and civil engineering structures, when the ground is so-called soft ground having a small bearing capacity, reinforced concrete piles and steel piles are often used for reinforcement of foundation slabs. Has been constructed. Since the piles of this type are usually constructed up to a depth reaching the hard ground deep in the ground, the depth of the piles often reaches several tens of meters. Therefore, when constructing piles having such a depth, a method is employed in which a plurality of piles are sequentially connected in the axial direction.

By the way, as a method of constructing this type of pile,
There is a pre-boring method in which a pile hole is drilled in advance and then driven. This construction method, for example, as shown in FIGS. 3 and 4, inserts the lower end of the first reinforced concrete pile 2 vertically lifted by a pile driver (not shown) into the pile hole 1 drilled with an earth auger or the like. And lowering it while rotating it, and then connecting the second reinforced concrete pile 3 to this pile 2, one end side of the tool 4 such as a wire is attached to the first pile 2 as shown in FIG. 3, and the other end side is hung on a heavy vehicle 5 such as a backhoe as shown in FIG. 3 so that the pile 2 is positioned (temporarily fixed) in the pile hole 1 to prevent falling. And in this state,
After welding the lower end of the newly lifted second pile 3 to the upper end of the first pile 2 and connecting them, two integrated piles 2,
3 is further lowered, and a third reinforced concrete pile (not shown) is connected in the same manner.

[0004]

However, when the piles are thus connected to each other, the other end of the tool 4 wound around the lower pile 2 is hooked on the heavy vehicle 5 and the lower pile 2 is temporarily fixed. In the method described above, it is difficult to connect workers such as an operator of a pile driver that lifts the upper pile to be connected, an operator of the heavy vehicle 5, and a welding operator,
In addition to the problem of poor workability, the measure 4 may be loosened due to the careless movement of the heavy vehicle 5 or the like, which is a sufficient method from the viewpoint of safety measures for preventing the pile from falling. I had a difficult problem to say.

Further, when welding the piles to each other, there is a problem that the feet are unstable and the workability is poor, and there is a risk that an operator falls into the pile hole 1, and further, the weight is used for temporarily fixing the piles. There is also a problem that a wide space for arranging the vehicle 5 is required, and therefore some measure against these has been conventionally desired.

The present invention has been made in consideration of the above points, and it is possible to temporarily and safely fix the piles when the piles are connected to each other, and work for the temporary fixing and welding work. It is intended to provide a method for constructing a pile, which has good workability such as that, and can work even in a relatively narrow space.

[0007]

The invention according to claim 1 is
In the pile hole drilled from above the ground, it is a method of constructing a pile that descends and is buried while connecting multiple piles in the axial direction,
A support base with a gap with a spacing larger than the diameter of the pile,
It is installed on the ground with the gap of the support base and the pile hole matched, and when connecting the upper and lower piles, the device is wound around the lower pile and a part of the device is provided on the support base. It is characterized in that the lower pile is positioned in the middle of the pile hole by hanging it on the hook.

[0008]

According to the pile construction method of the first aspect, the support base is installed on the ground and is in a stable state. Therefore, by temporarily fixing the lower piles when connecting the upper and lower piles by using this support base, the positioning of the lower piles and the fall prevention action can be ensured. In this case, by fixing the pile to the hook provided on the support base via the implement, the pulling angle of the implement based on the weight of the pile becomes stable. Further, the upper surface of the support base 20 can be used as a stable work scaffold. Further, since the support base is installed right above the pile holes, even if this support first is used for temporarily fixing the piles with the aid of a tool, a small work space is required.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the accompanying FIGS. The method of constructing a pile according to the present embodiment is the method of constructing a pile in which a plurality of piles 11 and 12 are axially connected in a pile hole 10 drilled from the ground G while being lowered to be embedded. A support base 20 having a gap S with a gap larger than the diameter of 11 is prepared, and the gap S of the support base 20 and the pile hole 10 are installed on the ground G in a state of being matched with each other, and the upper and lower piles 11, 12 When the two are connected, the lower pile 11 is positioned in the middle of the pile hole 10 by winding the countermeasure tool 30 around the lower pile 11 and hooking a part of the countermeasure tool 30 on the hook provided on the support base 20. The method of (temporary fixing) is adopted.

Next, the details thereof will be described. The support base 20 used in this embodiment has a pair of base parts 21, 21 extending in parallel with each other as shown in FIG.
It is provided with a base 22 and a connecting portion 22 that connects the bases 21, and is configured as a so-called horseshoe shape having a generally U-shaped plan. Therefore, the gap S is formed as a gap having a shape like a slit formed between the two base parts 21, 21.

The support base 20 itself is, for example, a concrete support base containing reinforcing bars or other reinforcing materials, or a steel support base having a hollow interior made of steel plate or the like in consideration of weight reduction. Is configured as. Further, the upper surface of the support base 20 is formed into a flat surface so that it can be used as a work scaffold, and the lower surface is also formed into a flat surface in consideration of installation stability.

The size of the gap S, that is, both base parts 2
The spacing α between the first and the second 21 is designed to be larger than the diameter d of the pile 11, and therefore, as shown in FIG.
It is considered that the pile 11 can be positioned upright in the part and that the pile 11 itself can be moved up and down.

A large hook 23 having a structure capable of withstanding a large weight is provided at the center of the upper surface of the connecting portion 22, and a part of the tool 30 wound around the pile 11 is attached to the hook 23.
In the illustrated example, both ends are hooked. Reference numeral 24 is a hanging measure for hoisting and installing or moving the supporting base 20, and both ends of this hanging measure are respectively attached to eyebolts 25, 25 provided at the center of gravity of the upper surface of the supporting base 20. It is installed.

In order to construct a pile using the support base 20 constructed as described above, first, as shown in FIG. 2, the pile hole 10 is drilled with an earth auger or the like. Next, the supporting table 20 is hoisted by using the suspending means 24 so that the gap S of the supporting table 20 and the pile hole 10 coincide with each other, that is, the gap S is located immediately above the pile hole 10. Install on the ground G while adjusting.

Next, the lower end of the first pile 11 which is vertically lifted by a pile driving machine (not shown) is inserted and lowered while rotating it, and then the second pile 12 is attached to the pile 11. When connecting, the central part of the device 30 is wound around the first pile 2 and both ends are hooked on the hooks 23 of the support base 20 to position the pile 11 in the middle of the pile hole 10 (temporary). (Fix it) to prevent it from falling. Then, in this state, 2 was newly lifted by a pile driver or the like.
After the lower end of the second pile 12 is welded to the upper end of the first pile 11 and connected, the two integrated piles 11 and 12 are further lowered, and similarly, the third pile (not shown) Connect.

In the above work, since the support base 20 is installed on the ground G and is in a stable state, the upper and lower piles 1
By temporarily fixing the lower pile 11 when connecting 1 and 12 by using this support base 20, the lower pile 1
Positioning of 1 and prevention of drop can be performed reliably and easily. In this case, by fixing the pile 11 to the hook 23 provided on the support base 20 via the tack tool 30, the pulling angle of the tack tool 30 based on the weight of the pile becomes stable, and therefore from this point as well, Positioning and temporary fixing are more reliable.

Further, a work of winding the central portion of the countermeasure tool 30 around a pile and hooking both ends thereof to the hooks 23, and the upper and lower piles 1
When the work of welding 1 and 12 is performed on the flat upper surface of the support 20, work with a firm scaffold can be performed, and workability and work efficiency are improved accordingly.

Further, since the support base 20 is installed right above the pile hole 10, even if the support 20 is used for temporarily fixing the pile through the countermeasure tool 30, a small working space is required, and therefore, the conventional work is not required. Since the work can be performed in an extremely narrow space as compared with the case where the heavy vehicle is used as described above, the work can be performed at a work site where there is no installation space for the heavy vehicle.

In the embodiment, the example in which the support base 20 used for temporarily fixing the pile is formed in a U-shape in a plane is shown.
For example, it may have any shape as long as it has a gap S, such as a plane U shape, a square shape, or an H shape, and is not limited to the above embodiment. Further, the structure of the support base 20 and the structural material thereof are not limited to steel plate and concrete, and may be a lightweight structure or a lightweight material in consideration of transportability and the like.

[0020]

As described above, according to the pile construction method of the present invention, the following excellent effects are obtained.

In the invention according to claim 1, there is provided a method for constructing a pile in which a plurality of piles are axially connected and lowered to be embedded in a pile hole drilled from the ground, wherein A support base with a gap larger than the diameter is installed on the ground with the gap of the support base and the pile holes aligned, and when connecting the upper and lower piles, wind the tool on the lower pile. Since the lower pile is positioned in the middle of the pile hole by turning and hooking a part of the tool to the hook provided on the support base, install it on the ground when connecting the piles. By using a stable and stable support base, the piles can be safely and reliably temporarily fixed, and the support base can be used as a work scaffold, so work such as temporary fixing work and welding work can be performed. It is also possible to make it extremely good, The weight vehicle is not required, it is possible to enable work in a relatively small space.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing an embodiment of the present invention.

FIG. 3 is a partial sectional view showing a conventional example.

FIG. 4 is a partial side view showing a conventional example.

[Explanation of symbols]

 10 Pile Hole 11 Pile (Lower Pile) 12 Pile (Upper Pile) 20 Support Base 21 Base Part 22 Connection Part 23 Hook 24 Suspension Measure 30 Measure Tool S Gap

Claims (1)

[Claims] 1. A method of constructing a pile in which a plurality of piles are axially connected and lowered while being buried in a pile hole drilled from the ground, the gap having a gap larger than the diameter of the pile. Is installed on the ground with the clearance of the support and the hole of the pile matched, and when connecting the upper and lower piles, the measure is wound around the lower pile and one of the measures is A method for constructing a pile, characterized in that a lower pile is positioned in the middle of a pile hole by hooking a portion to a hook provided on a support base.