JPH05295732A - Crosswise sheet pile removing method - Google Patents

Abstract

PURPOSE:To remove crosswise sheet piles of sheathing wall, which is likely to cause depression of a road. CONSTITUTION:Steel piles 3 such as H-shape, etc., are struck in the ground, and between them 3 crosswise sheet piles 4 are set over in a laminate. At laminating, hook members 9 each having a hang-up member 10 are in advance fixed to the undermost sheet pile 4a. They 10 are coupled with the sheet piles 4 situated in the upper part using a backing strip. After constructing a sheathing wall as intended 1, the hang-up members 10 are pulled up followed by raising of the sheet piles 4 in the laminated state, and then the piles 4 are taken off one by one from the steel piles 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing a horizontal sheet pile used as a retaining wall for constructing an underground structure for laying a cable.

[0002]

2. Description of the Related Art When a horizontal sheet pile used as a retaining wall is buried in the ground, cavities are formed in the ground due to corrosion of the horizontal sheet pile, or the horizontal sheet pile forms a water channel in the ground. Not only cause road collapse and ground subsidence, but also hinder the construction of new underground structures in the future. It is necessary to remove it from the inside.

By the way, as to the construction of the retaining wall using such a horizontal sheet pile, the Japanese Patent Publication No. 52-50449, Japanese Utility Model Publication No. 61-33071, and Japanese Utility Model Publication No. 55-85 have been used.
There is a technique disclosed in Japanese Patent No. 133, etc. Japanese Examined Sho 52-
Japanese Patent No. 50449 uses a horizontal sheet pile as a mountain retaining wall, but only describes that the horizontal sheet pile is pulled out from the mountain retaining wall, and does not disclose a concrete removing method. In addition, Japanese Utility Model Publication No. 61-33071 discloses that a horizontal sheet pile for burying is attached between H steel piles in order to prevent sediment outflow after backfilling, and only suggests burying of the horizontal sheet pile. Furthermore, Japanese Utility Model Publication No. 55-85133 is a technology relating to piles for mountain retaining, and there is no description about the method for removing the horizontal sheet pile.

[0004]

Therefore, the above-mentioned prior art does not disclose the removal of the lateral sheet pile, and the lateral sheet pile cannot be removed from these prior arts, and the lateral sheet pile is still buried. The fact is that the problems caused by are not solved.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a method for removing a horizontal sheet pile that solves various problems of the road subsidence caused by the burying of the horizontal sheet pile and the ground subsidence party. It is in.

[0006]

In order to achieve the above-mentioned object, the present invention has a lifting member connected to at least the lowermost horizontal sheet pile among the horizontal sheet piles that are stretched over steel piles that are driven into the ground. It is characterized in that the hook members are attached and the horizontal sheet piles are sequentially laminated, the lifting member and the horizontal sheet piles in the upper part are coupled, and in this state, the horizontal sheet piles are removed from between the steel piles while pulling up the lifting member.

[0007]

In the above structure, when the lifting member is attached to the hook member of the horizontal sheet pile and the member is pulled up, the plurality of stacked horizontal sheet piles are simultaneously moved upward along the steel pile. At this time,
Since each horizontal sheet pile is connected to the lifting member, the stacked state can be smoothly pulled up without breaking the stacked state. Then, the horizontal sheet piles can be removed one by one from the steel pile by releasing the connection of the horizontal sheet piles.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on illustrated embodiments. In each embodiment, the same elements are designated by the same reference numerals and correspond to each other.

1 to 7 show an embodiment of the present invention.
FIG. 1 shows a construction state of the retaining wall 1. The retaining wall 1 is constructed at a position adjacent to the underground structure 2 with the underground structure 2 sandwiched from both sides. Construction of such retaining wall 1 is carried out by steel piles 3 such as H-section steel in the ground.
After placing or press-fitting at a predetermined interval, the cross sheet pile 4 is bridged between the steel piles 3. The horizontal sheet pile 4 acts as a soil retaining wall by being sequentially laminated between the steel piles 3. In the illustrated example, the lower soil retaining wall group 5 is used.
And the earth retaining wall group 6 on the upper side. FIG. 3 shows a state in which a horizontal sheet pile 4 is bridged between the steel piles 3, and the horizontal sheet pile 4 is a steel pile 3
Of the steel pile 3 and the web portion 3b of the steel pile 3 have a constant distance. The present invention utilizes this interval to remove the horizontal sheet pile 4 from the steel pile 3.

In FIG. 1, 7 is a group of upper and lower earth retaining walls 5, 6.
Is a back sheet pile provided in a separated portion of the
Are laminated along the outer flange portion 3a of the steel pile 3. Reference numeral 8 is a square bar provided between the back sheet pile 7 and the upper earth retaining wall group 6.

In this embodiment, when the lower retaining wall group 5 is constructed, the hook member 9 is previously attached to the lowermost horizontal sheet pile 4a. The hook member 9 is brought into an engaged state by being hooked on the lowermost horizontal sheet pile 4a. As shown in FIGS. 1 and 2, the hook member 9 is connected to a long lifting member 10 such as a wire. Then, when laminating the horizontal sheet piles 4 on the upper stage, the respective horizontal sheet piles 4 and the lifting members 10 are coupled. When the horizontal sheet pile is made of wood, this connection is performed by appropriate means such as driving or bonding the member, and when it is steel, welding the member. In FIGS. 1 and 2, a portion indicated by reference numeral 11 is a connecting portion between the hoisting member 10 and each lateral sheet pile 4. In the illustrated example, two lifting members 10 are provided for each row of horizontal sheet piles 4, but the number is not particularly limited. Further, the upper end portion of the lifting member 10 is connected by a connecting plate 12.

A method of removing the horizontal sheet pile 4 after the soil retaining wall 1 is constructed as described above will be described with reference to FIGS. 4 to 7.
In these figures, 13 is a beam member installed between the steel piles 3 facing each other, and prevents the steel piles 3 from falling inward by earth pressure. First, as shown in FIG. 4, the hook arm 14 is engaged with the connecting plate 12 connecting the upper end portion of the lifting member 10. A chain 15 is connected to the hook arm 14, and the chain 15 is connected to driving means (not shown) such as a crane. Then, the driving means is driven to pull up the lifting member 10.
As a result, the lowermost horizontal sheet pile 4a is pulled up by the hook member 9, so that the lower earth retaining wall group 5 rises along the steel pile 3. At this time, since the case side sheet pile 4 is connected to the hoisting member 10, the stacked state can be smoothly pulled up without breaking the stacked state. Then, when the uppermost horizontal sheet pile 4 reaches the back sheet pile 7, after the connection between the horizontal sheet pile 4 and the lifting member 10 is released, the distance between the horizontal sheet pile 4 and the web portion 3b of the steel pile 3 (Fig. 3), the transverse sheet pile 4 is removed from the steel pile 3 as shown in FIG. Hereinafter, as shown in FIGS. 6 and 7, while removing the earth retaining wall group 5, the horizontal sheet piles 4 are removed from the steel pile 3 one by one, and the removal of the lower earth retaining wall group 5 is completed. After the above, with respect to the earth retaining wall group 6 and the back sheet pile 7 on the upper side, the horizontal sheet piles 4 are removed one by one from the steel pile 3 while backfilling.

With such a structure, since all the lateral sheet piles 4 can be removed from the retaining wall groups 5 and 6, road collapse, ground subsidence, etc. due to the burying of the lateral sheet piles 4 can be prevented, and a new structure can be constructed. It will not become an obstacle to.

FIG. 8 and FIG. 9 show a second embodiment of the present invention. In this embodiment, the hook member 9 is attached to the horizontal sheet pile 4 for each predetermined laminated block (every three sheet piles in the illustrated example). It is installed. Therefore, the pulling-up is performed for each of the stacked blocks, but since it is divided into a plurality of blocks, the pulling-up force becomes small, and the pulling-up can be performed more smoothly.

10 and 11 show a third embodiment of the present invention. In this embodiment, the lifting members 10 are provided on both sides of the horizontal sheet pile 4. To arrange such a lifting member 10, after stacking the lifting member 10 on the back side of the horizontal sheet pile 4 while pulling it in, the lifting member 10 is drawn to the front side of the horizontal sheet pile 4, and the horizontal sheet pile 4 and the front side and the lifting member 10 are arranged. Can be performed by connecting the above with the member. In this embodiment, since the lifting member 10 pulls up the horizontal sheet pile 4 from both sides, there is an advantage that the horizontal sheet pile 4 can be pulled up evenly and surely and smoothly.

[0016]

As described above, according to the present invention, the hook members are attached to the horizontal sheet piles and stacked, and the horizontal sheet piles are removed from the steel pile while pulling up the lifting members connected to the hook members. Since the sheet piles can be reliably removed, there is an advantage that it is possible to prevent environmental deterioration such as road sinking and ground subsidence due to the burying of the horizontal sheet piles.

[Brief description of drawings]

FIG. 1 is a perspective view showing a retaining wall in a first embodiment of the present invention.

FIG. 2 is a perspective view showing a stacked state of the horizontal sheet piles according to the first embodiment.

FIG. 3 is a plan view showing a state in which a horizontal sheet pile is laid on a steel pile.

FIG. 4 is a cross-sectional view showing a step of removing the horizontal sheet pile according to the first embodiment.

FIG. 5 is a cross-sectional view showing a step of removing the horizontal sheet pile according to the first embodiment.

FIG. 6 is a cross-sectional view showing a step of removing the horizontal sheet pile according to the first embodiment.

FIG. 7 is a cross-sectional view showing a step of removing the horizontal sheet pile according to the first embodiment.

FIG. 8 is a perspective view showing a retaining wall of a second embodiment of the present invention.

FIG. 9 is a perspective view showing a laminated state of the transverse sheet piles according to the second embodiment.

FIG. 10 is a perspective view showing a retaining wall of a third embodiment of the present invention.

FIG. 11 is a perspective view showing a stacked state of the transverse sheet piles according to the third embodiment.

[Explanation of symbols]

 3 Steel pile 4 Horizontal sheet pile 9 Hook member 10 Lifting member

 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Tetsuo Kamiyama 1-606 Horinouchi-cho, Omiya-shi, Saitama Grand City S-910 (72) Inventor Katsuro Wakabayashi 8-20-8 Shakujidai, Nerima-ku, Tokyo

Claims (1)

[Claims] 1. A horizontal sheet pile to be laid on a steel pile placed in the ground, at least the horizontal sheet pile at the bottom of the horizontal sheet pile is attached with a hook member connected to a lifting member, and the horizontal sheet piles are sequentially laminated, A horizontal sheet pile removing method, characterized in that the horizontal sheet piles of the upper part are connected to each other and the horizontal sheet piles are removed from between the steel piles while pulling up the suspension members in this state.