JP2657631B2 - Tip shape shoe of ready-made pile - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shoe having a tip shape of a ready-made pile which is attached to a tip of a ready-made pile which is cast at a construction site.

[0002]

2. Description of the Related Art At the construction site of construction work such as a building, and at a foundation work site of civil engineering, a pile, such as a steel pipe pile, an H steel pile, a steel sheet pile pile, or a concrete pole pile, is driven by a blow, A pile driver using the principle of vibration and press-fitting is used. The pile driving capability of this pile driver alone is limited to relatively soft ground, and it cannot be driven into any ground without causing noise and ground vibration pollution. For this reason,
Conventionally, a water jet jet excavation method is commonly used as an auxiliary method. As shown in FIG. 9, this water jet jet digging method is a ring-shaped method in which a plurality of nozzles (2) are formed on the outer periphery of the tip of a cylindrical steel pipe pile (1) as a precast pile. A pipe (3) is attached, a water pipe (4) is communicated with the ring-shaped pipe (3), and the nozzle part (2) is passed through the water pipe (4) and the ring-shaped pipe (3).
Steel pipe pile by excavating water and excavating rock by water pressure (1)
Into the bedrock. However, the nozzle part (2)
Is installed outside the outer peripheral surface of the steel pipe pile (1),
As shown in FIG. 10, a jet excavated portion (A
1) has a circular shape centered on the nozzle portion (2) located outside the outer peripheral surface of the steel pipe pile (1). Therefore, when driving the steel pipe pile (1), the tip surface (1) of the steel pipe pile (1) is driven.
Since the effective excavation range for A) is the dimension (B1),
There is a problem that the jet excavation part (A1) cannot be used efficiently. When a plurality of nozzles (2) and a ring-shaped pipe (3) are attached to the outer periphery of the steel pipe pile (1) to be driven in, the presence of the nozzle part (2) and the ring-shaped pipe (3) causes the steel pipe pile (1). The rock contact area of (1) increases, and the pressure at the time of driving the steel pipe pile (1) into the rock increases, which makes it difficult to drive the steel pipe pile (1).

[0003]

SUMMARY OF THE INVENTION The present invention has been devised in order to solve the above-mentioned problem. A nozzle is provided at a portion corresponding to the tip surface of a pre-cast pile to be driven, and the tip of the pre-cast pile is driven by the water pressure of the nozzle. An object of the present invention is to provide a shoe having a tip shape of a ready-made pile, which can excavate a portion corresponding to the surface and efficiently drive the existing pile into a bedrock.

[0004]

According to the first aspect of the present invention,
A shoe body having a tip face formed in a tip face shape of a pile driven into the rock, a flowing water groove formed in the shoe body and flowing water, and a running water groove attached to the tip face of the shoe body. A nozzle formed with an injection hole communicating with the groove, a through hole formed in the outer peripheral surface of the shoe body and communicated with the flowing water groove, and attached to the outer peripheral surface of the shoe body corresponding to the through hole and providing water transmission; And an elbow pipe communicating with the pipe. The invention according to claim 2 is characterized in that the tip end surface of the shoe body is formed in a ring shape. The invention according to claim 3 is characterized in that the tip surface shape of the shoe main body is formed in an H shape. According to a fourth aspect of the present invention, the shape of the front end surface of the shoe body is substantially U-shaped.

[0005]

According to the present invention, when a tip-shaped shoe of a ready-made stake is attached to the stake, the tip of the ready-made stake is fixed to the shoe body.
Then, the ready-made pile is driven into the bedrock, and the water sent out by the pump flows into a flowing water groove formed in the shoe body. And rock is excavated with water by jetting water at high pressure from a high pressure nozzle. Since the high-pressure nozzle is fixed to the front end surface of the shoe main body corresponding to the water flow groove of the shoe main body, rock is excavated corresponding to the front end surface of the shoe main body. Therefore, the tip-shaped shoe of the ready-made pile and the ready-made pile can be driven efficiently.

[0006]

First Embodiment FIGS. 1 to 4 show a first embodiment of a tip-shaped shoe of a ready-made pile according to the present invention. As shown in FIG. 1, the tip of a cylindrical steel pipe pile (1) as a ready-made pile has a tip-shaped shoe (1) of a ready-made pile formed in a cylindrical shape.
0) is fixed by welding. As shown in FIG. 2, the tip surface (2) of the tip shoe (10) of this ready-made pile is shown.
0) is formed in a ring shape corresponding to the tip end surface (1A) of the steel pipe pile (1). As shown in FIG. 1, a ring-shaped running water groove (14) is formed in the shoe body (12) in the axial direction. This running water ditch (14)
Is supplied with water supplied by a pump (not shown). Further, the inner wall (16) and the outer wall (18) are formed in the shoe body (12) by the formation of the flowing water groove (14). The width dimension (D) of the running water groove (14) is set slightly larger than the thickness dimension (E) of the steel pipe pile (1), and the steel pipe pile (1) is
4). The base end of the inner wall (16) is notched, and the cutout surface (16A) is formed, so that the length is shorter than the outer wall (18). As shown in FIG. 3, a screw hole (22) is formed through the center of the tip surface (20) of the shoe body (12) in the thickness direction (the direction of arrow F). As shown in FIG.
A plurality (eight in this embodiment) of the screw holes (22) are formed at intervals. As shown in FIG. 1, a high-pressure nozzle (24) is provided at a portion corresponding to the screw hole (22).
Can be attached. The high-pressure nozzle (24) is provided with a male screw (26) projecting therefrom, and the male screw (26) is screwed into the screw hole (22), whereby the high-pressure nozzle (24) is connected to the shoe body (12). ). An injection hole (28) is formed through the high-pressure nozzle (24). The injection hole (24) is gradually reduced in diameter from the male screw portion (26) toward the tip. A through hole (30) is formed in the outer wall (18) of the cylindrical body (16). This through hole (30)
An elbow pipe (32) is fixed to the outer peripheral surface of the outer wall (18) corresponding to the above. This elbow pipe (3
2) is connected to a high pressure pipe (34).

Next, the operation of the first embodiment will be described. When mounting the tip-shaped shoe (10) of the ready-made pile to the steel pipe pile (1), as shown in FIG. 1, the steel pipe pile (1) is inserted with the tip of the steel pipe pile (1) inserted into the shoe body (12). And the tip-shaped shoe (10) are fixed by welding. Then, the steel pipe pile (1) is driven into the rock using a water jet pile driving machine (not shown). Water sent out by a pump (not shown) passes through a high-pressure pipe (34) and passes through an elbow pipe (32). Through the running water ditch (1
Flow into 4). Then, water is injected at a high pressure from the injection hole (28) of the high-pressure nozzle (24), so that the rock is excavated with the hydraulic pressure. As shown in FIG. 4, the high-pressure nozzle (24) is connected to the ring-shaped tip surface (2) of the shoe body (12).
0) is fixed at the center in the thickness direction (the direction of arrow F in FIG. 3), so that the jet excavation range (A2) is closer to the tip end surface (20) of the shoe body (12) by the dimension (G) than in the past. . For this reason, the tip surface (20) of the shoe body (12)
The effective excavation size (B2) becomes larger. As a result, the tip-shaped shoe (10) and the steel pipe pile (1) of the ready-made pile can be efficiently driven in combination with the principle of hitting, vibration and press-fitting by the water jet pile driving machine. In addition, the effective excavation dimension (B2) for the shoe body (12) is increased, so that the number of high-pressure nozzles (24) can be reduced as compared with the related art. Further, as shown in FIG. 1, the outer shape of the shoe body (12) of the tip-shaped shoe (10) protrudes outward from the outer shape of the steel pipe pile (1), so that the reflection when the steel pipe pile (1) is driven into the rock. The steel pipe pile (1) can be cut and can also serve as reinforcement.
Furthermore, since a ring-shaped pipe (3) having a plurality of nozzles (2) formed thereon is conventionally attached to the outer periphery of the tip of the steel pipe pile (1), the ring-shaped pipe (1) is driven when the steel pipe pile (1) is driven. In some cases, a large impact was generated in the pipe (3), and the nozzle part (2) and the ring-shaped pipe (3) were damaged.

[0008]

Second Embodiment FIGS. 5 and 6 show a second embodiment of a tip-shaped shoe of a ready-made pile according to the present invention. In the second embodiment, an H-shaped pile is used as a ready-made pile. The first
The same components as those of the embodiment are denoted by the same reference numerals, and description thereof will be omitted. As shown in FIG. 5, a tip-shaped shoe (40) of a ready-made pile is attached to the tip of an H-shaped pile (5) as a ready-made pile. The tip-shaped shoe (4
The tip surface (44) of the shoe body (42) of (0) is formed in an H shape like the tip surface of the H-shaped pile (5). As shown in FIG. 6, the base end surface (46) of the shoe body (42)
Is formed with an H-shaped running water groove (48). The width dimension (I) of the flowing water groove (48) is formed slightly larger than the thickness dimension (J) of the H-shaped pile (5) (see FIG. 5), and the H-shaped pile (5) It can fit in the groove (48) (see FIG. 5). The shoe body (1
A screw hole (22) is formed in the center of the thickness (K) of the front end surface (44) in the front end surface (44) of 2). The screw holes (22) are spaced apart from each other to form screw holes (22).
Are formed through a plurality (13 in this embodiment).
A high-pressure nozzle (24) is fixed to a portion of the tip surface (44) of the shoe body (42) corresponding to the screw hole (22). Further, the outer surface (1) of the shoe body (42).
8) is formed with a through hole (30). An elbow pipe (32) is fixed to the outer peripheral surface of the outer wall (18) corresponding to the through hole (30). This elbow pipe (32) is connected to a high pressure pipe (34).

Next, the operation of the second embodiment will be described. The tip shape shoe (40) of the ready-made pile is replaced with an H-shaped pile (5)
When the tip of the H-shaped pile (5) is slightly inserted into the running water groove (48) of the shoe body (42),
The figure-shaped pile (5) and the shoe body (42) are fixed by welding.
Then, the H-shaped pile (5) is driven into the bedrock. Water sent out by a pump (not shown) passes through a high-pressure pipe (34), passes through an elbow pipe (32), and flows into a flowing water groove (48). Flow in. And the high pressure nozzle (2
The rock is excavated with water pressure by being injected at a high pressure from the injection hole (28) of 4). This high pressure nozzle (24)
Is fixed at the center of the thickness dimension (K) of the tip surface (44), and excavates rock in an H-shape corresponding to the tip surface (44) of the shoe body (42). Therefore, the effective excavation dimension (B) with respect to the tip end surface (44) of the shoe body (42).
Since 2) is large, the tip-shaped shoe (10) and the H-shaped pile (5) of the ready-made pile can be efficiently driven in combination with the principle of hitting, vibration and press-fitting by the water jet pile driving machine. Since other operations are the same as those of the first embodiment,
Omitted.

[0010]

Third Embodiment FIGS. 7 and 8 show a third embodiment of a tip-shaped shoe of a ready-made pile according to the present invention. In the third embodiment, a steel sheet pile is used as a ready-made pile. The first
The same components as those of the embodiment are denoted by the same reference numerals, and description thereof will be omitted. As shown in FIG. 7, a tip-shaped shoe (50) of a ready-made pile is fixed to the tip of a steel sheet pile (6) as a ready-made pile by welding. The tip surface (54) of the shoe body (52) of the tip shape shoe (50) of the ready-made pile is formed in a substantially U-shape like the tip surface of the steel sheet pile (6). As shown in FIG. 8, a substantially U-shaped running water groove (58) is formed on the base end surface (56) of the shoe body (52). The width dimension (L) of the running water groove (58) is formed slightly larger than the thickness of the steel sheet pile (6) so that the steel sheet pile (6) can be fitted into the flowing water groove (58). (See FIG. 7). A screw hole (22) is formed through the center of the thickness dimension (M) of the tip end surface (54). A plurality of (9 in this embodiment) through holes are formed in the screw holes (22) at intervals. The shoe body (5
A high-pressure nozzle (24) is fixed to a portion corresponding to the screw hole (22) on the tip surface (54) of (2). Also,
A through hole (30) is formed in the outer surface of the shoe body (52). An elbow pipe (32) is fixed to the through hole (30). This elbow pipe (3
2) is connected to a high pressure pipe (34).

Next, the operation of the third embodiment will be described. The tip shape shoe (50) of the ready-made pile is replaced with a steel sheet pile (6)
When the steel sheet pile (6) is attached to the shoe pile (6), the steel sheet pile (6) and the shoe body (52) are fixed by welding with the tip of the steel sheet pile (6) being slightly inserted into the flow groove (58) of the shoe body (52).
Then, the steel sheet pile (6) is driven into the bedrock. Water sent out by a pump (not shown) passes through the high-pressure pipe (34), flows through the elbow pipe (32), and flows into the flowing water groove (58). . And the high pressure nozzle (2
The rock is excavated with water pressure by being injected at a high pressure from the injection hole (28) of 4). This high pressure nozzle (24)
Is fixed to the center of the thickness dimension (M) of the tip surface (54), and is provided corresponding to the tip surface (54) of the shoe body (52). Excavate. Therefore, the effective excavation dimension (B2) with respect to the tip surface (54) of the shoe body (52) is large. The pile (6) can be efficiently driven. The other operation is the same as that of the first embodiment, and thus will not be described.

In the embodiment, the cylindrical pile (1), the H-shaped pile (5), and the steel sheet pile (6) are shown as the preformed piles. However, it is needless to say that preformed piles of other shapes may be used. In the embodiment, the high-pressure pipe (34) is continuously connected to the elbow pipe (32). However, it goes without saying that a high-pressure hose may be continuously connected to the elbow pipe (32). It is needless to say that the number of high-pressure nozzles (24) to be attached is not limited to the above embodiment.

[0013]

As described above, the tip-shaped shoe of the ready-made stake according to the present invention has the tip face of the shoe body formed on the tip face of the existing stake, and the high-pressure nozzle is provided on the tip face of the shoe body. Since the rock is excavated by water pressure in correspondence with the existing pile to be driven, there is an excellent effect that the existing pile to be driven can be efficiently driven.

[Brief description of the drawings]

FIG. 1 is a side view showing a first embodiment of a tip-shaped shoe of a ready-made pile according to the present invention.

FIG. 2 is a front view showing a first embodiment of a tip-shaped shoe of a ready-made pile according to the present invention.

FIG. 3 is a partially cutaway sectional view of a tip-shaped shoe of a ready-made pile according to the present invention.

FIG. 4 is a schematic operation explanatory view of the first embodiment of the tip-shaped shoe of the ready-made pile according to the present invention.

FIG. 5 is a perspective view showing a second embodiment of a tip-shaped shoe of a ready-made pile according to the present invention.

FIG. 6 is a plan view showing a second embodiment of a tip-shaped shoe of a ready-made pile according to the present invention.

FIG. 7 is a perspective view illustrating a third embodiment of a tip-shaped shoe of a ready-made pile according to the present invention.

FIG. 8 is a plan view showing a third embodiment of a tip-shaped shoe of a ready-made pile according to the present invention.

FIG. 9 is a perspective view of a tip shoe of a conventional ready-made pile.

FIG. 10 is an explanatory diagram of an operation of a conventional tip shoe of a ready-made pile.

[Explanation of symbols]

 (10) ... tip shape shoe of ready-made pile (12) ... shoe body (14) ... running water groove (20) ... tip surface (22) ... screw hole (24) ... High pressure nozzle (32) ・ ・ ・ Elbow pipe

Claims (4)

(57) [Claims] 1. A shoe body having a tip face formed into a tip face shape of a pile driven into a rock, a flowing water groove formed in the shoe body and flowing water, and a tip face of the shoe body. Attached and communicates with the water channel
A nozzle injection holes are formed, a through hole is formed on the outer circumferential surface of the shoe body was communicated with the flowing water groove, the through
And an elbow pipe connected to the outer peripheral surface of the shoe body corresponding to the hole and communicating with the water guide pipe. 2. A tip-shaped shoe for a ready-made pile according to claim 1, wherein the tip surface of the shoe body is formed in a ring shape. 3. The shoe according to claim 1, wherein the tip surface of the shoe body is formed in an H-shape. 4. The shoe according to claim 1, wherein the tip surface of the shoe body has a substantially U-shape.