JP2001323464A - Assist device for driving steel sheet pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an assist device for driving a steel sheet pile, being excellent in wear resistance for the driving so that it can withstand a number of times of repeated uses for economical advantages; and being also excellent in the effect of crushing the ground, increasing the speed of excavation and thus enabling improvement of working efficiency. SOLUTION: In the assist device for the driving of the steel sheet pile A, a crushing bar 4 is attached to an assisting sheet pile 2 extending along the inner surface of the steel sheet pile A to be placed, with the end of the crushing rod 4 facing the end of the assisting sheet pile 2. An end fitting 9 formed of a material with wear resistance is attached to the end of the crushing bar 4, whereby the device is excellent in the effect of crushing the ground and the strength of the end portion of the crushing bar 4 is greatly enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving assist device and a driving method used for driving steel sheet piles used for mountain retaining, earth retaining, revetment, and the like.

[0002]

2. Description of the Related Art Japanese Patent Laid-Open Publication No. Hei 8-170332 proposes a setting assisting device and a setting method for setting a steel sheet pile on a hard ground such as a gravel layer mixed with cobble stones. I have.

[0003] In this driving assistance device, a jet pipe and crushing rods are attached to the inner surface side of an auxiliary sheet pile along the inner surface of a steel sheet pile along a longitudinal center line at positions on both sides of the jet pipe. Has a structure projecting from the tip of the auxiliary sheet pile,
The driving method is as follows: this driving aid is attached to the inner surface of the steel sheet pile to be driven, and both the steel sheet pile and the driving aid are driven into the ground simultaneously with a vibratory pile driver. The ground is crushed with two crushing rods together with the high-pressure water injected from the pipe, and when the steel sheet pile reaches a predetermined depth, only the driving assist device is pulled out to the ground, thereby, It assists casting and prevents damage and eliminates the need for excavation work on the ground.

[0004]

The two crushing rods have a structure in which a steel rail is used and a tip protruding from the tip of the auxiliary sheet pile is cut at right angles to the longitudinal direction. However, such a crushing rod has a problem that the effect of crushing the ground is small, the tip surface is resistant to the driving, and the excavation speed is reduced.

[0005] In addition, the crushing rod has a problem that the working efficiency is poor because the tip is severely worn and its replacement frequency is increased.

Accordingly, an object of the present invention is to improve the work efficiency by improving the abrasion resistance and withstanding repeated use repeatedly, being economically advantageous, excelling in the ground crushing effect, and increasing the excavation speed. It is an object of the present invention to provide a steel sheet pile driving assist device which becomes possible.

[0007]

In order to solve the above-mentioned problems, a first aspect of the present invention is to attach a crushing rod to an auxiliary sheet pile along the inner surface of a steel sheet pile to be driven and to attach the crushing rod to the auxiliary sheet pile. In a steel sheet pile driving assist device having a tip facing the tip of an auxiliary sheet pile, a configuration is employed in which a tip fitting made of a wear-resistant material is attached to the tip of the crushing rod.

According to a second aspect of the present invention, a crushing rod is attached to an auxiliary sheet pile having substantially the same cross-sectional shape as a steel sheet pile to be driven, and the steel sheet pile is driven with the tip of the crushing rod facing the tip of the auxiliary sheet pile. In the installation assisting device, a configuration is employed in which a tip fitting made of a wear-resistant material is attached to the tip of the crushing rod.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

A driving assist device 1 according to a first embodiment shown in FIGS. 1 and 2 is of a type which is mounted on the inner surface side of a steel sheet pile A and driven simultaneously. An auxiliary sheet pile 2 extending along the inner surface, a tip plate 3 formed of a hard metal and having a cross section similar to that of the steel sheet pile A and extending at the tip of the auxiliary sheet pile 2, and both sides on the inner surface side of the auxiliary sheet pile 2 Two crushing rods 4 attached along the longitudinal direction at the position of
And a jet pipe 5 for jetting high-pressure water attached at a position between the crushing rods 4.

The auxiliary sheet pile 2 is made of the same steel material as that of the steel sheet pile A, and has a cross-sectional shape similar to that of the steel sheet pile A so as to be fitted and fitted on the inner surface side of the steel sheet pile A, and includes the tip plate 3. The total length is set to the same length as the steel sheet pile A. At the upper end of the auxiliary sheet pile 2, a plate 6 for pulling out the auxiliary sheet pile after driving is protruded.

The tip plate 3 is made of wear-resistant cast steel or molybdenum steel and has the same cross-sectional shape as the auxiliary sheet pile 2 and has a required length up and down. It is attached by welding to the tip.

As shown in FIG. 2, the steel sheet pile A and the auxiliary sheet pile 2 are integrated when they are simultaneously driven.
Notches 7 are provided on both sides at the tip of the tip plate 3,
The engaging pieces 8 are welded on both sides at the tip of the steel sheet pile A, and the steel sheet pile A is welded.
When the auxiliary sheet pile 2 is set at the position, the notch 7 is engaged with the engaging piece 8 in the driving direction.

The two crushing rods 4 are formed of a rod material such as a steel rail, and have a length extending over the entire length of the tip plate 3 and the auxiliary sheet pile 2. The crushing rod 4 is fixed by welding in a symmetrical arrangement, and a tip fitting 9 made of a wear-resistant material is attached to the tip of the crushing rod 4.

As shown in FIG. 2, the tip metal fitting 9 is made of, for example, high manganese cast steel, and has a triangular prism-shaped tip 10 projecting from the tip of the crushing rod 4 and a two-piece projecting from the upper end of the tip 10. The two mounting portions 11 formed by the book mounting portion 11 and becoming bifurcated are inserted from both ends of the crushing rod 4 from both ends, and the mounting portion 11 and the crushing rod 4 are fastened with a plurality of bolts and nuts 12. Accordingly, the crushing rod 4 is attached to the tip of the crushing rod 4 in a state where the tip 10 protrudes.

As described above, the tip fitting 9 attached to the tip of the crushing rod 4 has a tip portion 10 protruding from the tip of the tip plate 3 as shown in FIG.

The jet pipe 5 for jetting high-pressure water is fixed between the two crushing rods 4 on the inner side of the auxiliary sheet pile 2, and the upper end is connected to a high-pressure water supply pump (not shown).
A high-pressure nozzle tip 13 is attached to a tip located inside the tip plate 3.

The driving assistance device of the first embodiment has the above-described configuration. Next, a driving method using the driving assistance device 1 will be described.

An auxiliary sheet pile 2 is overlaid on the inner surface of the steel sheet pile A to be driven in such a manner that the tip of the tip metal fitting 9 projects from the tip of the steel sheet pile A. After properly holding the steel sheet pile A and the auxiliary sheet pile 2 at predetermined positions while holding the upper end thereof by a vibratory hammer such as a vibro hammer, the vibratory hammer is Is activated, and the steel sheet pile A and the auxiliary sheet pile 2 are driven into the ground together with vibration.

At the time of the above-mentioned driving, the tip metal 9 of the crushing rod 4 protrudes from the tip of the tip plate 3, so that the tip metal 9 crushes the ground, and the ground of the steel sheet pile A and the auxiliary sheet pile 2 is ground. Is smoothly guided, and the efficiency of driving into the ground is improved.

At the time of the driving, high-pressure water is jetted in the direction of excavation from the high-pressure nozzle tip 13 of the jet pipe 5 attached to the auxiliary sheet pile 2 to crush the ground at the tip of the steel sheet pile A and the auxiliary sheet pile 2. I do. By driving the vibratory pile driver together with the vibration of the high-pressure water, it is possible to efficiently excavate even hard ground such as sand and gravel mixed with cobblestone and to penetrate the steel sheet pile A to a predetermined depth. it can.

When the steel sheet pile A penetrates to a predetermined depth,
The driving of the steel sheet pile A is completed by removing the vibratory pile driver and the holding tool, and pulling out only the auxiliary sheet pile 2 to the ground, and repeating the driving of the steel sheet pile A as described above.
Earth retaining wall and the like are constructed.

The driving assist device 1a according to the second embodiment shown in FIG. 3 is a preceding driving type for the steel sheet pile A, and has the same cross-sectional shape as the steel sheet pile A to be driven. A tip plate having a similar cross-sectional shape attached to the tip of the auxiliary sheet pile 2a, a crushing rod attached along the longitudinal direction at positions on both sides on the inner surface side of the auxiliary sheet pile 2a, and a crushing rod located between the crushing rods. And a jet pipe for jetting high-pressure water.

The driving assist device 1a according to the second embodiment.
Is the same as the first embodiment except that the auxiliary sheet pile 2a has substantially the same cross-sectional shape as the steel sheet pile A,
Details are omitted.

Next, a description will be given of a driving method using the driving assistance device according to the second embodiment.

The upper end of the auxiliary sheet pile 2a is held by a vibratory hammer such as a vibro hammer, and the auxiliary sheet pile 2a is erected at a position where the steel sheet pile A is to be driven. The sheet pile 2a is driven into the ground while being vibrated.

At the time of the driving, the tip metal of the crushing rod 4 crushes the ground, so that the auxiliary sheet pile 2a can be smoothly guided into the ground, and the efficiency of driving the ground can be improved.

Further, even when the solid ground such as gravel mixed with cobblestones is encountered during the driving, the drop of the driving efficiency is prevented by the vibration of the vibrating pile driver and the impact of the weight of the auxiliary sheet pile 2a. By jetting high-pressure water from the high-pressure nozzle tip 13 of the jet pipe 5 in the excavation direction and crushing the ground at the tip of the auxiliary sheet pile 2a, it is possible to efficiently excavate even hard ground, and Penetrate to depth.

When the auxiliary sheet pile 2a has penetrated to a predetermined depth, the vibratory pile driver is removed, the auxiliary sheet pile 2a is pulled out to the ground, and then the steel sheet pile A is erected just above the pulling mark, and the vibratory pile The steel sheet pile A is driven into the ground along the pulling trace of the auxiliary sheet pile by the vibration of the driving machine.

As described above, since the pulling traces of the auxiliary sheet pile 2a are formed in advance at the portion where the steel sheet pile A is cast, no great resistance is generated in driving the steel sheet pile A, and the efficiency of the steel sheet pile A is improved. It will be possible to cast well.

In both of the above embodiments, the tip fitting 9 of the crushing rod 4 has an arrowhead-like sharpened shape.
The excavation performance at the time of casting is improved, the excavation speed is about three times higher than that of the conventional one, and since the tip metal fitting 9 is formed using high manganese cast steel, it has excellent wear resistance and strength. Is greatly improved, and the abrasion resistance is increased about five times as compared with the conventional one.

[0032]

As described above, according to the present invention, the crushing rod is attached to the auxiliary sheet pile along the inner surface of the steel sheet pile to be driven, and the tip of the crushing rod projects from the tip of the auxiliary sheet pile. In the sheet pile driving assist device, a tip fitting made of a wear-resistant material is attached to the tip of the crushing rod. It is possible to improve the efficiency of driving a sheet pile.

Also, by attaching the tip metal having wear resistance to the tip of the crushing rod, the strength of the tip of the crushing rod is greatly improved, and the crushing rod can be repeatedly used many times without replacement. , The economic effect is also improved.

[Brief description of the drawings]

FIG. 1A is a front view showing a driving assistance device according to a first embodiment, FIG. 1B is an enlarged front view of a tip fitting of the driving assistance device, and FIG. ) Bottom view

FIG. 2 (A) is a perspective view showing a state in which a tip metal fitting and a steel sheet pile of a driving assist device are set, FIG. 2 (B) is a cross-sectional plan view thereof,
(C) is a perspective view of the tip fitting.

FIG. 3 is a bottom view of the driving assistance device according to the second embodiment, which is set with a steel sheet pile.

[Explanation of symbols]

 Reference Signs List A steel sheet pile 1 driving assisting device 2 auxiliary sheet pile 3 tip plate 4 crushing rod 5 jet pipe for jetting high-pressure water 9 tip fitting

Continuing from the front page (72) Inventor Shinsho Dojo No. 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo Taisei Construction Co., Ltd. (72) Inventor Jun Kuribayashi 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo Taisei Construction Shares In-house (72) Inventor Hiroki Horie 1-25-1, Nishi Shinjuku, Shinjuku-ku, Tokyo Taisei Construction Co., Ltd. (72) Inventor Shin Ikuta 1-12-19 Kitahorie, Nishi-ku, Osaka Co., Ltd. In-house (72) Inventor Shigeo Fukui 1-12-19 Kitahorie, Nishi-ku, Osaka-shi Inside Kurimoto Iron Works Co., Ltd. (72) Inventor Yasunori Mitsui 1-12-19 Kitahorie, Nishi-ku, Osaka-shi Co., Ltd. In-house F term (reference) 2D049 EA02 EA03 FA08 FB03 FB12 FC03 2D050 AA12 AA16 CB32 CB42

Claims (2)

[Claims] A crushing rod is attached to an auxiliary sheet pile along an inner surface of a steel sheet pile to be driven, and the crushing rod is attached to the auxiliary sheet pile. A steel sheet pile driving assist device, wherein a tip metal fitting made of a wear-resistant material is attached to a tip of a rod. 2. A steel sheet pile driving assistance device, wherein a crushing rod is attached to an auxiliary sheet pile having substantially the same cross-sectional shape as a steel sheet pile to be driven, and the tip of the crushing rod faces the tip of the auxiliary sheet pile. A steel sheet pile driving assist device, wherein a tip metal fitting made of a wear-resistant material is attached to a tip of the crushing rod.