JPS6346517Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a steel sheet pile drawing machine, and particularly to a drawing machine for steel sheet piles having a groove-shaped or H-shaped cross section.

Conventional technology and its problems When steel sheet piles are erected underground, the soil around the steel sheet piles is drawn into the steel sheet piles as the steel sheet piles are erected, and is attached to the steel sheet piles in a compacted manner. Sometimes. Additionally, if steel sheet piles are left underground for a long period of time, soil may adhere to the steel sheet piles due to the earth pressure of the surrounding ground. For this reason, when the steel sheet piles are pulled out, the ground around the top of the steel sheet piles is lifted by the pulled steel sheet piles and becomes soft, or the ground around the top of the steel sheet piles is removed by the pulled steel sheet piles, making it unnecessary to create a cavity after the steel sheet piles are pulled out. This can cause the ground around the construction site to loosen and shift. This tendency is particularly noticeable on the inner surface side of the groove in steel sheet piles with a groove-shaped or H-shaped cross-section.

Conventionally, no apparatus has been provided that can pull out steel sheet piles with a groove-shaped or H-shaped cross section from underground without such problems.

The soil attached to the inner surface of the groove of the steel sheet pile in a consolidated state does not necessarily show the same degree of consolidation on the ventral side and the back side of the steel sheet pile. In particular, the difference in the degree of consolidation on both sides of channel steel sheet piles is large.

Thus, in order to pull out a trench-shaped or H-shaped steel sheet pile from the ground without weakening or loosening the ground, it is necessary to consider the effective pull-out resistance of the ground, which differs between the vent side and the back side of the steel sheet pile. Unless measures are taken, its realization will not be achieved. Until now, no countermeasures have been developed for this.

Incidentally, as a conventional device for pulling out piles from underground without weakening or loosening the ground, there is a device disclosed in Japanese Patent Application Laid-open No. 122903/1983. This conventional device targets piles that are substantially cylindrical;
The pile is pulled out while the internal soil is compressed by pressurized fluid or a pressed earth plate.In order to ensure that this internal soil remains and to prevent the soil from lifting on the outer surface of the pile, a seismic machine is installed on the pile. This is done by applying vibrations. In the case where the pile has a groove-shaped cross section or is made of H-shaped steel sheet piles, such measures to prevent soil lifting cannot effectively and quickly respond to the different pull-out resistance of the ground between the front and back sides of the pile.

The purpose of the present invention is to provide a pulling machine for steel sheet piles with a groove-shaped or H-shaped cross section, which can effectively pull out the ground even when the pulling resistance of the ground differs between the vent side and the back side of the steel sheet pile. To provide a steel sheet pile pulling machine which can take immediate measures against consolidation, can pull out this type of steel sheet pile without weakening or loosening the ground, and can simply do this using a fluid pressure jack.

Means for Solving the Problems The above object of the present invention is achieved by a drawing machine having the following configuration.

The components include a fluid pressure jack that is arranged side by side and integrally fixes and connects the elevating body parts, and a chuck with a grooved cross section or an H-shaped steel sheet pile for pulling out the H-shaped steel sheet pile, which is provided on the elevating body part. In this type, the steel sheet piles are held between the opposing chuck-jyos and the chuck-jyos in a state in which the steel sheet piles are extended vertically and penetratingly. A steel sheet pile drawing machine that is formed separately on a separate base for each pressure jack.

Embodiments Next, embodiments of the present invention will be described with reference to the accompanying drawings.

In the figure, 1 is a steel sheet pile with a trench-shaped or H-shaped cross section built underground, 2, 2 are chucks for gripping and pulling out the steel sheet pile 1, and 3, 3 are standing side by side in a predetermined direction. In addition, in the fluid pressure jack in which the elevating body part 7 is integrally fixed and connected, the chucks 2, 2 are in a state where the steel sheet pile 1 extends vertically and penetratingly between the opposing chuck jacks 2a and 2a. A type that grips the steel sheet piles. A hydraulic jack can be used as the fluid pressure jacks 3, 3. Reference numeral 4 denotes a ground pressure plate that consolidates the ground at the site where the steel sheet pile 1 is pulled out, and the ground pressure plate 4 is connected to a separate base 5 for each of the hydraulic jacks 3, 3.
5 separately. It is preferable that the end portion 4a of the earth pressing plate 4 has a shape that fits into the groove of the steel sheet pile 1 and substantially follows the groove. 6,
6 is a fluid pressure cylinder of the fluid pressure jacks 3, 3, and by fixing the elevating body part 7 to these, the elevating body part 7 is integrally fixed and connected to the fluid pressure jacks 3, 3. This elevating body portion 7 is provided with the chucks 2, 2 mentioned above.

The procedure for pulling out steel sheet piles using the drawing machine of the present invention will be described below with reference to the symbols shown in the drawings.

The pulling machine of the present invention is set on the steel sheet pile 1 that has been erected in the ground, that is, one ground pressure soil plate 4 is placed on the ground on the ventral side of the steel sheet pile 1 at the site where the steel sheet pile 1 is pulled out, and the other ground pressure soil plate 4 is placed on the ground on the ventral side of the steel sheet pile 1 at the site where the steel sheet pile 1 is pulled out. The fluid pressure jacks 3, 3 are grounded on the back side of the steel sheet pile 1 at the site where the steel sheet pile is being pulled out.
The figure shows a state in which the steel sheet piles 1 are gripped by the flickers 2 and 2 while the steel sheet piles 1 are installed.

From this state, both hydraulic jacks 3, 3 are operated, and the chuck 2, which is in a state where the steel sheet pile 1 is gripped, is operated.
When the chucks 2, 2 are raised repeatedly and the chucks 2, 2 are lowered in the open state, the steel sheet pile 1 is pulled out.

When the steel sheet pile 1 is pulled out, the hydraulic jacks 3, 3, one of which is located on the ventral side of the steel sheet pile 1 and the other on the back side of the steel sheet pile 1, are connected to each other by integrally fixing the elevating body part 7. A reaction force is applied to the separately formed ground pressure plates 4, 4 via the separate bases 5, 5 of each hydraulic jack 3, 3. For this reason, one of the ground compaction plates 4, 4 consolidates the ground on the back side of the steel sheet pile 1 at the site where the steel sheet pile 1 is pulled out by the above-mentioned pulling reaction force, and the other one consolidates the ground on the back side of the steel sheet pile 1 at the site where the steel sheet pile 1 is pulled out. will be consolidated by the above-mentioned pulling reaction force. Therefore, even if the pulling resistance of the ground differs between the vent side and the back side of the steel sheet pile 1, fluid pressure can be applied equally to both fluid pressure jacks 3, 3 to compensate for the different pulling resistance of the ground on both sides. The ground compaction action of both ground compaction plates 4, 4 can be effectively and quickly achieved.

Moreover, such a preferable ground consolidation result of each of the ground compaction plates 4, 4 is achieved by the chucks 2a and 2 facing each other in the steel sheet pile pulling chucks 2, 2.
Since the steel sheet pile is designed to be held between the upper and lower ends of the sheet pile extending vertically through space a, chuck 2,
2, the entire length of the steel sheet pile 1 is performed by repeating the raising and lowering operations in the manner described above. That is,
The steel sheet pile 1 can be easily pulled out by the chucks 2, 2 using the fluid pressure jacks 3, 3 while consolidating the ground at the site where the steel sheet piles are pulled out with the earth pressure plates 4, 4.

Effects of the invention Thus, according to the invention, even if the pull-out resistance of the ground differs between the vent side and the back side of a steel sheet pile with a groove-shaped or H-shaped cross-section, it is possible to effectively take measures to consolidate the ground. As a result, it can be pulled out without weakening or loosening the ground, and this can be easily done using a hydraulic jack.

[Brief explanation of the drawing]

Figure 1 is a front view showing one embodiment of the present invention;
The figure is a side view, and FIG. 3 is a plan view. 1 is a steel sheet pile, 2 is a pullout chuck, 2a is a chuck jack, 3 is a fluid pressure jack, 4 is a ground pressure earth plate, 5 is a fluid pressure jack base, 6 is a fluid pressure cylinder, and 7 is an elevating body part.

Claims (1)

[Scope of utility model registration request] The components include a fluid pressure jack that is arranged side by side and integrally fixes and connects the elevating body parts, and a chuck with a grooved cross section or an H-shaped steel sheet pile for pulling out the H-shaped steel sheet pile, which is provided on the elevating body part. In this type, the steel sheet piles are held between the opposing chuck-jyos and the chuck-jyos in a state in which the steel sheet piles are extended vertically and penetratingly. A steel sheet pile drawing machine that is formed separately on a separate base for each pressure jack.