JPH08144267A - Slide sheet pile and earth retaining method thereby - Google Patents

Abstract

PURPOSE: To provide a slide sheet pile capable of being slid smoothly and surely and to make it possible to carry out excavation work efficiently without requiring re- shorting of a shore. CONSTITUTION: A slide sheet pile A is constituted of a longer outside sheet pile 1 and an inside sheet pile 2 having the roughly same length and width as the length and width of the outside sheet pile. The outside sheet pile 1 and inside sheet pile 2 are arranged in a state to overlap them in the longitudinal direction of them in a slidable manner, and their cross section is formed in the shape of a wave. A plurality of threads of ribs 1a on the inside of the outside sheet pile 1 or the surface on a slidable contact side are formed in the longitudinal direction thereof, and the front end of each of the ribs 1a is brought into contact with the outside of the inside sheet pile 2 in a slidable manner. Holding sections 1b are formed on both ends of the outside sheet pile 1, and they are so interlocked that both ends 2a of the inside sheet pile 2 are held in a slidable manner. Stopper pieces 1c are formed on the surface of the slidable contact side of the outside sheet pile 1 and, at the same time, a stopper member 3 is provided to the outside of the inside sheet pile 2. The stopper pieces 1c are formed in two places, and the stopper member 3 can be moved between both of them.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide sheet pile used for earth retaining work and a soil retaining method using the same.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG.
As shown in (A) and (B), the sheet pile S
Soil retention materials such as the above are arranged almost vertically, and the uprising material T is installed substantially horizontally in two steps inside the sheet pile S.
To prevent collapse of the soil on the excavated surface.

[0003] In the above construction, first, while supporting the support such as the sheet pile S and the uprising material T in a state where the excavation depth is less than 1 m, the safety is ensured and then the excavation is further carried out. The sheet pile S was dropped downward while refilling the upholstery material T and the like.

[0004]

However, the conventional earth retaining method using sheet pile has the following problems to be solved. 1) When the sheet pile S is dropped downward, it is necessary to refill the uprising material T and the like, which requires time and labor for the work. 2) At the first stage, the upper part of the sheet pile S projects high above the ground, which is an obstacle. 3) A long sheet pile is required, which makes transportation and handling difficult.

[0005]

In order to solve the above-mentioned problems, the slide sheet pile of the present invention has an inner sheet pile having a length and a width that are substantially the same as the outer sheet pile and an inner sheet pile having an appropriate length and width. In a slide sheet pile that is arranged in a combined state and is configured such that the outer sheet pile and the inner sheet pile are slidable in the longitudinal direction, a rib in the longitudinal direction is formed on the inner side surface of the outer sheet pile, and the rib is formed. The inner sheet pile is slidably brought into contact with the tip of the inner sheet pile, and the holding portions are formed at both ends of the outer sheet pile so that both ends of the inner sheet pile can be slidably held. Characterize. The outer sheet pile and / or the inner sheet pile is preferably formed in a corrugated cross section. Further, two stopper pieces are provided on the surface of the outer sheet pile on the sliding contact side at appropriate intervals in the longitudinal direction, and a stopper member is provided on the surface of the inner sheet pile on the sliding contact side to form the outer sheet pile and the outer sheet pile. It is also characterized in that when the inner sheet piles are slid on each other, the stopper member moves while being regulated between the two stopper pieces.

Further, in the earth retaining method using the slide sheet pile of the present invention, first, a groove is excavated to a depth of about 1 m, and the slide sheet pile having the above-mentioned construction is almost perpendicular to the ground of the excavated groove. After supporting the slide sheet pile by supporting members such as upholstery material and cutting beam material, the groove is further dug deeper, and the inner sheet pile of the slide sheet pile is slid downward along with the dug. The feature is that it is designed to prevent the collapse of the ground at the excavated part.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 (A) and 1 (B), A is a slide sheet pile, and mainly includes an elongated outer sheet pile 1 having an appropriate length and width, and a length substantially equal to that of the outer sheet pile 1 (as in this embodiment). (Including slightly shorter ones) and an inner sheet pile 2 having a width. These outer sheet piles 1
The inner sheet pile 2 and the inner sheet pile 2 are arranged so as to be slidable in the longitudinal direction in an overlapped state, and the shape of the cross section thereof is formed in a corrugated shape.

On the inner surface of the outer sheet pile 1 or the surface on the sliding contact side (the surface on the inner sheet pile 2 side), a plurality of ribs (4 in this embodiment) of ribs 1a are formed in the longitudinal direction. The tips of the ribs 1a slidably contact the outer surface of the inner sheet pile 2.

Enclosing portions 1b are formed at both ends of the outer sheet pile 1 and slidably engage with both ends 2a of the inner sheet pile 2 so as to embrace them. The left and right end portions 2a of the inner sheet pile 2 and the left and right hugging portions 1b of the outer sheet pile 1 of the present embodiment have different shapes, but they may have the same shape.

Further, a stopper piece 1c is formed on the surface of the outer sheet pile 1 on the sliding contact side, and a stopper member 3 for abutting the stopper piece 1c is also provided on the outer surface of the inner sheet pile 2. ing. Above stopper piece 1
c is formed in two places, and the stopper member 3 can move between them.

As shown in FIG. 2, the stopper member 3
Is mainly composed of a stopper body 3a, a locking piece 3b projecting upward from one end of the stopper body 3a, and a screw shaft 3c projecting from the stopper body 3a. As described above, the pin 3b is inserted and fixed in the locking hole 2b formed in the inner sheet pile 2, the screw shaft 3c is inserted in the elongated hole 2c formed in the inner sheet pile 2, and the inner sheet pile is formed by the nut 3d. It is clamped and fixed to 2. The stopper member 3 is rotated by 90 ° after loosening or removing the nut 3d,
It can be removed from the elongated hole 2c formed in the inner sheet pile 2.

Further, in FIG. 1, reference numeral 4 denotes a fixing pin, which is a state in which the slide sheet pile A is contracted (state of FIG. 1A), and the insertion holes 1d of the outer sheet pile 1 and the inner sheet pile 2 are inserted in the insertion holes 1d, 2d
(See FIG. 4) The two sheet piles 1 and 2 are fixed so as not to slip unintentionally. 4a
Is a retaining pin, and 4b is a connecting chain.

Reference numerals 1e and 2e denote handle holes formed at the tips of the outer sheet pile 1 and the inner sheet pile 2, respectively. In the present embodiment, the inner sheet pile 2 is slightly shorter so that the inner sheet pile 2 does not overlap the handle hole 1d of the outer sheet pile 1 in the contracted state.

Since the slide sheet pile A of this embodiment is constructed as described above, as shown in FIG. 4, the fixing pin 4 is pulled out and then the inner sheet pile 2 is slid as shown by the arrow to be extended. You can On the surface of the outer sheet pile 1 on the sliding contact side, two stopper pieces 1c are provided with an appropriate interval.
Therefore, when the inner sheet pile 2 is slid, the stopper member 3 provided on the inner sheet pile 2 comes into contact with the lower stopper piece 1c, and the inner sheet pile 2 stops sliding (see FIG. 3 (B)). In this way, the two sheet piles 1 and 2 slide and expand and contract so that the stopper member 3 provided on the inner sheet pile 2 is restricted between the two stopper pieces 1c formed on the outer sheet pile 1. To do.

Next, the earth retaining method using the slide sheet pile A of the above embodiment will be described.

First, a machine or a hand trench is used to vertically excavate to a depth of about 1 m, and as shown in FIG. 5, the slide sheet piles A are built substantially vertically along the ground at appropriate intervals. In this case, the direction in which the inner sheet pile 2 extends is directed downward.

Subsequently, inside the slide sheet pile A, the upholstery material T is installed substantially horizontally in two steps, and the upholstery material T is supported by the crossbeam U. If necessary, an intermediate slide sheet pile may be inserted between the slide sheet piles A.

In the state where the above-mentioned earth retaining is performed and safety is secured,
Further digging, and along with this, the inner sheet pile 2 of the slide sheet pile A is slid downward and extended.

[0019]

【The invention's effect】

1) Since the ribs in the longitudinal direction are formed on the inner side surface of the outer sheet pile, and the inner sheet pile is slidably brought into contact with the tips of the ribs, the slide sheet can be slid smoothly and reliably. 2) Since the holding portions are formed at both ends of the outer sheet pile so that both ends of the inner sheet pile can be slidably held, the inner sheet pile can be smoothly operated without being disturbed by the upholstery material or the like. Can slide to. 3) Since the outer sheet pile and / or the inner sheet pile is formed in a corrugated section, it is possible to increase the second moment of area and to provide a lightweight and large bending resistance. 4) Since the stoppers are provided on the outer and inner sheet piles, the slide operation can be performed safely and reliably. 5) It is not necessary to refill the support work such as upholstery material, so that excavation work can be performed efficiently, and there is no risk that the upper part of the sheet pile protrudes above the ground and becomes an obstacle.

[Brief description of drawings]

FIG. 1A is a front view showing an embodiment of a slide sheet pile according to the present invention, and FIG. 1B is an enlarged end view seen from the direction of the arrow in FIG.

FIG. 2 is an explanatory view of a stopper member.

FIG. 3 is an explanatory view of mounting a stopper member.

FIG. 4 is a front view of the slide sheet pile according to the present embodiment in an extended state.

FIG. 5 is an explanatory diagram of a soil retaining method.

FIG. 6 is an explanatory diagram of a conventional earth retaining method using a sheet pile.

[Explanation of symbols]

 1 Outer sheet pile 1a Rib 1b Embracing part 1c Stopper piece 1d Insert hole 1e Hand hole 2 Inner sheet pile 2a End 2b Locking hole 2c Slot 2d Insert hole 2e Hand hole 3 Stopper member 3a Stopper body 3b Locking piece 3c Screw shaft 3d Nut 4 Fixing pin 4a Detachment pin 4b Connecting chain A Slide sheet pile S Sheet pile T Uprising material U Cut beam material

Claims (4)

[Claims] 1. An inner sheet pile having substantially the same length and width as that of the outer sheet pile is disposed inside the outer sheet pile having an appropriate length and width, and the outer sheet pile and the inner sheet pile are mutually connected. In the slide sheet pile configured to be slidable in the longitudinal direction, a rib in the longitudinal direction is formed on the inner side surface of the outer sheet pile, and the inner sheet pile is slidably brought into contact with the tip of the rib. A slide sheet pile characterized in that a holding portion is formed at both ends of the sheet pile so that both ends of the inner sheet pile can be slidably held. 2. The slide sheet pile according to claim 1, wherein the outer sheet pile and / or the inner sheet pile is formed in a corrugated cross section. 3. The two stopper pieces are provided on the surface of the outer sheet pile on the sliding contact side at appropriate intervals in the longitudinal direction, and
By providing a stopper member on the sliding contact side surface of the inner sheet pile,
3. The stopper member is configured to move while being regulated between the two stopper pieces when the outer sheet pile and the inner sheet pile are slid on each other. Slide sheet pile. 4. First, a trench is excavated to a depth of about 1 m,
In the ground of the excavated groove, the slide sheet pile according to claim 1, 2 or 3 is built in a substantially vertical state in a contracted state,
After supporting the slide sheet pile by supporting members such as an upholstery member and a beam member, the groove is further dug deeper, and with this dug, the inner sheet pile of the slide sheet pile is slid downward to form the dug portion. The earth retaining method using slide sheet piles, which is designed to prevent the ground from collapsing.