JP2003166240A - Fitting method of steel pipe pile with blade and casing driver used therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the fitting workability in the case a steel pipe pile with blades is fitted to a casing driver. <P>SOLUTION: A support device 17 holding a steel pipe pile with blades and making it stand is arranged at the lower face of a rotary driving device 7 of the casing driver. The casing driver 1 is installed in the pile center, and the steel pipe pile with blades is forced to penetrate the chucking device 8 of the casing driver 1 to ground the blade part onto the ground. The steel pipe is supported by the support device 17 and a spacer 13 is interposed between the chucking device 8 and the steel pipe. The steel pipe pile with blades is held together with the spacer 13. In this way, the steel pipe pile with blades can be fitted to the casing driver without influence of the blades. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mounting a steel pipe pile with blades, which is used for foundation works for construction and civil engineering, and which mounts a screw-type large diameter steel pipe pile with blades having a blade at its tip on a rotary casing driver. And a casing driver used for this.

[0002]

2. Description of the Related Art As a steel pipe pile with blades used for foundation works for construction and civil engineering, those disclosed in JP-A-11-36287 and JP-A-2000-170164 are known. These are characterized in that the blade diameter is larger than the diameter of the steel pipe, and that the blade is attached only to the tip. When the steel pipe pile with blades is press-fitted into the ground, the steel pipe portion is gripped by the chucking device of the casing driver. Therefore, a spacer that fills the space between the chucking device and the steel pipe is installed in advance in the rotary casing driver.However, if the steel pipe pile with vanes is inserted from above after mounting, the problem that the vanes cannot pass through the chucking device occurs. Occurs. To solve this problem, Japanese Patent Laid-Open No. 2000-248549 is disclosed.
This is a spacer in which concave grooves corresponding to the spiral pitch of the blades are formed.

[0003]

However, the above-mentioned Japanese Unexamined Patent Application Publication No.
The one disclosed in Japanese Patent Publication No. 000-248549 is limited in the shape of the tip blade portion of the steel pipe pile, and in a site where there are many steel pipe piles having different spiral pitches or shapes, a spacer suitable for each spiral blade is prepared and replaced. There must be. Further, providing the spacer with the spiral groove has a drawback that the cost is higher than that of a general one having no groove.

As another method, a hole corresponding to the tip blade diameter is made in the ground, the blade portion of the steel pipe pile with blades is inserted into the ground, the pile is erected vertically, and the casing driver is hung from above and inserted by a crane. A method is possible. However, when the steel pipe pile with blades is erected vertically, it is unstable when it is inserted into the hole made in the ground. Furthermore, since a spacer for gripping the steel pipe is attached to the casing driver, and the gap between the inner diameter of the spacer and the outer diameter of the steel pipe is very small, suspend the casing driver from above the steel pipe pile and The work efficiency is poor when the spacer is fitted into the inner diameter portion of the spacer because it takes time to align.

The present invention has been made in view of the above problems, and a method for safely and efficiently mounting a steel pipe pile with a large-diameter tip blade on a rotary casing driver, and a method for attaching a tip blade with various shapes. An object of the present invention is to provide a casing driver which can be applied to a steel pipe pile and can be mounted with the steel pipe pile without attaching a spacer provided with a spiral groove.

[0006]

In order to solve the above-mentioned problems, a method for mounting a steel pipe pile with blades according to the present invention is defined by claim 1.
In a method of rotationally press-fitting a vaned steel pipe pile into the ground, a casing driver having a support device for supporting the vaned steel pipe pile is installed at a pile core position, and the steel pipe pile chucking device is attached to the casing driver. Through the steel pipe pile with blades to ground the blade portion of the steel pipe pile with blades to the ground, and support the steel pipe portion of the steel pipe pile with blades by the supporting device attached to the casing driver, and the steel pipe pile chuck of the casing driver. A spacer that closes the gap between the king device and the outer circumference of the steel pipe portion of the vaned steel pipe pile is inserted from above, the steel pipe pile chucking device holds the vaned steel pipe pile together with the spacer, and the vane is attached by the casing driver. The steel pipe pile is rotated and pressed into the ground.

According to a second aspect of the invention, the steel pipe pile chucking device releases the support of the support device after the steel pipe pile with blades is gripped together with the spacer.

According to a third aspect of the present invention, a pile core aligning device provided with a pile core aligning means is installed so that the pile core aligning means matches a pile core marked on the ground. The casing driver is mounted on the aligning device.

According to a fourth aspect of the invention, the center of the steel pipe pile and the core of the pile are aligned by fitting the blade portion of the steel pipe pile with blades into the through hole provided in the center of the pile core aligning device. Is.

The casing driver of the present invention is a device for rotating and press-fitting a bladed steel pipe pile in the ground according to the invention of claim 5, wherein the bladed steel pipe is provided on the lower surface of the rotary drive device of the rotary casing driver. A supporting device for supporting the pile is provided.

According to a sixth aspect of the present invention, the casing driver is mounted, and a frame having a through hole having a diameter slightly larger than a blade diameter of the bladed steel pipe pile is formed in a central portion, and the frame is provided in the frame. , A pile core alignment means for displaying the center position of the through hole, and a pile core of a steel pipe pile with blades provided on the frame and mounted on the casing driver when the rotary casing driver is mounted on the frame, There is provided a pile core aligning device including a positioning means for positioning the mounting position of the casing driver so that the center position of the through hole displayed by the pile core aligning means matches.

According to a seventh aspect of the present invention, the casing driver includes a chuck device for gripping the vaned steel pipe pile and transmitting a rotational force, and the chuck device allows the vanes of the vaned steel pipe pile to pass therethrough. It is composed.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a casing driver equipped with a method of mounting a steel pipe pile with blades and a mounting device according to the present invention will be described with reference to FIGS.

FIG. 1 is a front view of a rotary casing driver used in the present invention, FIG. 2 is its plan view, and FIG. 3 is that of FIG.
3 is a partial sectional view taken along line III-III, FIG. 4 is a view taken along the line IV-IV in FIG. 1, FIG. 5 is a sectional view taken along line VV in FIG. 4, and FIG.
FIG. In these figures, 1 is a rotary casing driver (hereinafter referred to as a casing driver), and 2 is a pile center alignment device.

Here, the casing driver 1 includes a base frame 4 which is adjusted to a horizontal position by a jack cylinder 3, guide posts 5 standing on four corners of the base frame 4, and a thrust cylinder having one end attached to the base frame 4. The rotary drive device 7 is moved up and down along the guide post 5 by the guide post 6, and the chucking device 8 for chucking the steel pipe pile 100 attached to the rotary side portion of the rotary drive device 7.

As shown in FIG. 1, the rotation driving device 7 drives a slewing bearing 9 with external teeth, a pinion 10 that meshes with the external teeth of the slewing bearing 9 to rotate the slewing bearing 9, and the pinion 10. It is composed of a hydraulic motor 11 with a planetary speed reducer.

The chucking device 8 includes a fixed band 8
a and a fixed band 8a are composed of a pair of movable bands 8d swingably connected by a pin 8c. The fixed band 8a is fixed to the outer race on the rotating body side of the slewing bearing 9. A band cylinder 12 is connected to the other end of the movable band 8d, and the cylinder 12 chucks or opens the steel pipe pile 100 with tip blades. When the outer diameter of the vaned steel pipe pile 100 is smaller than the inner diameter of the chucking device 8, a donut-shaped gap is formed. Therefore, the gap is filled with the spacer 13 so that the steel pipe pile 100 with blades can be reliably chucked by the chucking device 8. The spacer 13 includes a fixed side spacer 13a attached to the fixed band 8a and two movable side spacers 13b.
Composed of. In both cases, the taper portion 13 is provided at the lower end.
A'and 13b '(only 13a' is shown) are provided to serve as a guide when inserting between a chucking device 8 and a steel pipe pile 100 described later. Further, as shown in FIG. 3, the spacer 13 is fixed to the chucking device 8 by inserting a large-diameter bolt 14 from the outside of the chucking device 8 and screwing the screw 14 into the threaded portion of the spacer 13.

A support device 17 for supporting the steel pipe pile 100 with blades is attached to the lower surface of the rotary drive device 7. The support device 17, as shown in FIG.
It is composed of a support cylinder 17a and a support 17b for supporting 0a. The support 17b is an arc-shaped plate attached to the end of the rod of the support cylinder 17a and adapted to the outer shape of the steel pipe portion 100a. The support cylinder 17a is fixed to a plate 7a attached to the rotary drive device 7. Here, in the support cylinder 17a, the blade portion 100b of the steel pipe pile 100 can pass through the space formed by the opposing supports 17b when the support cylinder 1a is in the minimum contraction state.
When 7a is in the most extended state, it is attached so that the center of the space formed by the opposing supports 17b is substantially the pile core.

The pile core alignment device 2 includes a frame 15 installed on the ground, a bracket 15a for accommodating the float 3a of the jack cylinder 3 provided on the upper surface of the frame 15, and a pile alignment round bar. It is configured by a bracket 15b provided with a V groove for mounting 16. Here, a through hole 15c slightly larger than the blade diameter is bored in the center of the frame 15 so that the blade portion 100b of the bladed steel pipe pile 100 can be fitted therein. The bracket 15b provided with the V groove is such that when the two round bars 16 are placed in the V groove so as to cross, the cross point becomes the center of the through hole 15c, and the float of the jack cylinder 3 of the casing driver 1 is provided. When the casing driver 1 is placed on the frame 15 so as to store 3a in the bracket 15a, the casing driver 1 is mounted on the frame 15 so as to match the rotation center of the chucking device 8. These devices provided on the frame 15 are configured so as not to interfere with the base frame 4 of the casing driver 1.

Next, a method of setting a steel pipe pile with a large-diameter tip blade on the pile core and mounting the steel pipe pile 100 on the casing driver 1 described above will be described with reference to FIGS. 1 to 8.

First, the pile core aligning device 2 is set at the pile core position (predetermined position of the wooden pile 101) into which the steel pipe pile 100 is press-fitted. That is, as shown in FIGS. 4 and 5, the round bar 16 is crossed to horizontally install the frame 15 mounted on the bracket 15b on the ground. At this time, the wooden pile 101 in which the cross point of the round bar 16 is driven into the ground
To the position of. After installation, the round bar 16 and the wooden pile 101 are removed.

Next, the casing driver 1 is placed on the pile core alignment device 2. At this time, the casing driver 1 is lifted by a separately prepared crane or the like (not shown) and gradually lowered and placed. However, when the float 3a of the jack cylinder 3 of the casing driver 1 approaches the upper surface of the frame 15, the float is removed. The casing driver 1 is further lowered so that 3a is aligned with the position of the bracket 15a, and the float 3a is finally stored in the bracket 15a. At this time, the spacer 13 is attached to the chucking device 8.
Is not installed.

Next, the vaned steel pipe pile 100 is inserted into the through hole 15c of the frame 15 from above the rotary casing driver 1 through the center of the chucking device 8. At this time, since the spacer 13 is not attached to the chucking device 8, a sufficient space is secured in the central portion of the chucking device 8 and the steel pipe pile 100 can be easily passed through the steel pipe pile 100 from above. The blade portion 100b can be passed. Then, the support cylinder 17a of the support device 17 attached to the lower surface of the rotary drive device 7 is extended to support the steel pipe portion 100a with the support 17b so as to have a slight gap so as not to grip or fall. As a result, the steel pipe pile 100 stands on the upper surface of the frame 15 substantially vertically. Here, when the support cylinder 17a is extended to the maximum extent, it is possible to know in advance whether or not the steel pipe portion cannot be gripped because it has a small diameter. Therefore, when the support cylinder 17a cannot be gripped, a ring (not shown) that fills a gap such as the spacer 13 described above. ) May be attached to the support 17b. Similarly, frame 1
When the diameter of the blade portion 100b of the steel pipe pile is smaller than the through hole 15c of No. 5, the gap is closed by a ring (not shown) or the like.

Next, in order to grip the steel pipe portion 100a of the steel pipe pile 100 with the chucking device 8, the spacer 13 is attached. First, the band cylinder 12 of the chucking device 8 is extended to open the movable band 8d. Then, as shown in FIG. 8, the fixed spacer 13a is hung from above,
The steel pipe pile 100 is inserted between the steel pipe portion 100a and the fixing band 8a. At this time, since the taper portion 13a 'is provided at the lower end portion of the fixed side spacer 13a, it is guided and inserted by this. At this time, since the movable band 8d is opened, the core of the steel pipe pile 100 can be moved to some extent. Then, the large-diameter bolt 14 is inserted from the outside of the fixed band 8a and screwed into the threaded portion of the fixed spacer 13a to fix the fixed spacer 13a to the fixed band 8a. The movable side spacer 13b is attached to the movable band 8d by the same procedure. Then, the band cylinder 12 is reduced to reduce the steel pipe portion 1
Hold 00a firmly.

Next, the support cylinder 17 of the support device 17
a is reduced to release the grip of the steel pipe portion 100a by the support 17b. From this state, excavation of the bladed steel pipe pile 100 is started. That is, with the chucking device 8, the steel pipe 1
Since 00a is gripped, the pinion 10 is driven when the hydraulic motor 11 is driven, whereby the pinion 1
The slewing bearing 9 with external teeth that meshes with 0 is rotated.
Therefore, the chucking device 8 fixed to the outer race of the slewing bearing 9 rotates, and the gripped steel pipe pile 100 is rotated.
Will rotate. At this time, the pile core alignment device 2
Through holes 15c formed in the frame 15 of the steel pipe pile 10
Since it is slightly larger than the outer diameter of the blade portion 100b of 0, it can be rotated without any trouble. In addition, thrust cylinder 6
The rotation drive device 7 integrated with the chucking device 8 can be lowered along the guide post 5 by reducing the force of the hydraulic motor 11 and the thrust cylinder 6.
The steel pipe pile 100 with tip blades can be rotationally press-fitted into the ground by the reduction of.

As described above, according to the present embodiment, the pile core aligning device 2 is used, and the blade portion 100b is fitted into the through hole 15c provided therein to align the steel pipe pile 100 with the pile core. However, instead of this method, a method may be adopted in which a hole corresponding to the blade diameter is made in advance on the ground with an earth auger or the like and the steel pipe pile 100 is inserted therein. Further, according to the present embodiment, the support cylinder 17 of the support device 17 is
Although the steel pipe pile 100 is temporarily supported by using a, it is also possible to provide another mechanical means to the casing driver 1 to support it. As described above, according to the present embodiment, even when the bladed steel pipe pile 100 is inserted from above the installed casing driver 1, a commonly used spacer is chucked instead of the spacer having the spiral groove. It suffices if it is attached to the device 8 and has an effect that it can be applied to the construction of steel pipe piles with various shapes of blades.

[0027]

As described above, according to the method of mounting a steel pipe pile with vanes of the present invention, the supporting device for the steel pipe pile of the vane steel pipe pile is mounted on the casing driver to vertically stand the steel pipe pile with vanes. Therefore, the spacer can be inserted between the outer peripheral portion of the steel pipe portion and the chucking device in a state where the steel pipe pile is vertically erected. Further, the casing driver equipped with the bladed steel pipe pile mounting device of the present invention can realize the above-described method, and can mount the steel pipe pile on the casing driver safely and efficiently. Also,
Since the spacer does not have to be a spacer having a spiral groove, the spacer can be constructed without being influenced by steel pipe piles of various sizes and blade shapes.

[Brief description of drawings]

FIG. 1 is a front view of a rotary casing driver used in a method and apparatus for mounting a steel pipe pile with blades according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a partial cross-sectional view taken along the line III-III in FIG.

4 is an arrow view taken along the line IV-IV in FIG.

5 is a cross-sectional view of FIG.

FIG. 6 is an enlarged view of an essential part showing an enlarged support device for the steel pipe pile in FIG. 1.

FIG. 7 is a view taken along the line VII-VII in FIG.

FIG. 8 is a diagram showing a state in which a spacer is inserted.

[Explanation of symbols]

1; Casing driver 2; Support device 8; chucking device 8a; fixed band 8d; movable band 13; Spacer 15; Frame 15b; bracket 16; Round bar 17; Support device 17a; Support cylinder 100; Steel pipe pile 100a; Steel pipe part 100b; feather part.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Ken Kamei             Hitachi Construction Machinery Co., Ltd.             Ceremony Company Tsuchiura Factory (72) Inventor Satoshi Hirao             Hitachi Construction Machinery Co., Ltd.             Ceremony Company Tsuchiura Factory F-term (reference) 2D050 AA06 CB22 CB23

Claims (7)

[Claims] 1. A method of rotationally press-fitting a steel pipe pile with blades into the ground, wherein a casing driver having a support device for supporting the steel pipe pile with blades is installed at a pile core position, and the steel pipe pile chucking is attached to the casing driver. The bladed steel pipe pile is passed through the device to ground the blade portion of the bladed steel pipe pile to the ground, and the steel pipe portion of the bladed steel pipe pile is supported by a supporting device attached to the casing driver. Insert a spacer that closes the gap between the chucking device and the outer circumference of the steel pipe portion of the vaned steel pipe pile from above, grip the vaned steel pipe pile together with the spacer by the steel pipe pile chucking device, and use the casing driver to the vane. A method for mounting a steel pipe pile with blades, characterized in that the steel pipe pile with a blade is rotated and press-fitted into the ground. 2. The method of mounting a steel pipe pile with blades according to claim 1, wherein the steel pipe pile chucking device grips the steel pipe pile with blades together with the spacer and then releases the support of the supporting device. . 3. The method for mounting a steel pipe pile with blades according to claim 1 or 2, wherein a pile core aligning device equipped with a pile core aligning means is provided on the pile core marked on the ground. And the casing driver is mounted on the pile core aligning device. 4. The method of mounting a steel pipe pile with blades according to claim 3, wherein the blade portion of the steel pipe pile with blades is fitted into a through hole provided in the center of the pile core alignment device. A method for mounting a steel pipe pile with vanes, characterized in that the center of the pile and the core of the pile are matched. 5. A casing driver for press-fitting a vaned steel pipe pile into a ground, wherein a support device for supporting the vaned steel pipe pile is provided on a lower surface of a rotary drive device of a rotary casing driver. 6. The casing driver according to claim 5, wherein the casing driver is placed, and a through hole having a diameter slightly larger than a blade diameter of the bladed steel pipe pile is formed in a central portion of the frame. Pile core alignment means provided on the frame and displaying the center position of the through hole; and a steel pipe pile with blades mounted on the casing driver when the rotary casing driver is mounted on the frame. A pile core aligning device that includes a positioning means that positions the mounting position of the casing driver so that the pile core of the above-mentioned and the center position of the through hole displayed by the pile core aligning means match each other. And casing driver. 7. The casing driver according to claim 5, wherein the casing driver includes a chuck device that grips the steel pipe pile with blades and transmits a rotational force, and the chuck device includes the steel pipe with blades. A casing driver, wherein the blades of a pile are configured to pass through.