JP2011241591A - Sheet pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet pile that is excellent in durability and workability.SOLUTION: A sheet pile 10 is capable of being driven into the ground by manually striking an upper end portion and comprises a hollow cross-section cylinder body 11 and a pair of joints 12 and 15 formed on an outer peripheral surface of the cylinder body 11. The pair of joints 12 and 15 comprises rib portions 13 and 16 extended along an axial direction on the outer peripheral surface of the cylinder body 11, and fitting portions 14 and 17 formed at a respective tips of the rib portions 13 and 16 and to be fitted with fitting portions of the other sheet pile 10 movably in the axial direction but immovably in the radial direction.

Description

  The present invention relates to a sheet pile pile. More specifically, the present invention relates to a sheet pile pile that is useful for retaining earth and water.

In order to prevent the boiling phenomenon by preventing earth pressure and water pressure by holding earth or blocking water to build the target structure, or to prevent the collapse of slopes and steps, earth retaining works are used. May be applied. For example, when a bridge pier is provided in a water area such as a river, the earth retaining work for placing a steel pipe sheet pile by placing a plurality of steel pipe sheet pile piles in which joints are directly welded to the steel pipe on the ground is applied.
However, since the steel pipe sheet pile pile has a structure in which a joint is directly welded to the steel pipe, the size of the steel pipe tends to be large, a large driving heavy machine is required, and conveyance and handling at the site are difficult.
Therefore, the steel pipe sheet pile using the steel pipe sheet pile is not suitable for a place where a large heavy machine is difficult to enter.

  Therefore, in places where large heavy machinery is difficult to enter, such as mountainous areas, wooden earth retaining fences may be installed because the materials are relatively lightweight and easy to transport to the construction site ( For example, see Patent Document 1).

Japanese Patent Laid-Open No. 8-113946

However, the wooden retaining fence has a drawback that durability is low because the log pile used for the wooden retaining fence is easily deteriorated by corrosion or the like. In addition, the wooden earth retaining fence is not suitable for a place where a large back surface earth pressure is applied because of its low mechanical strength.
Further, in the log pile, since the cross-sectional area of the cross section including the two lines perpendicular to the pile driving direction is large, when the log pile is driven into the ground, the contact portion between the log pile and the ground is There is a case where a great resistance is applied and it is difficult to drive the log pile manually. In such a case, since it is necessary to drive the log pile into the ground using a heavy machine, or to embed the log pile in a hole excavated in advance with a drilling tool, the construction may be difficult.

  This invention is made | formed in view of such a situation, and it aims at providing the sheet pile which is excellent in mechanical strength and is excellent in workability.

  The sheet pile of the present invention is a sheet pile that can be driven manually into the ground by hitting the upper end, and is a hollow cylinder section body and a pair of joint sections formed on the outer peripheral surface of the cylinder section body. The pair of joint portions are formed on the outer peripheral surface of the cylindrical portion main body along the axial direction, the rib portions are formed at the tips of the rib portions, and the joints of the other sheet pile piles. And a fitting portion that can be moved in the axial direction and cannot be moved in the radial direction.

Since the sheet pile according to the present invention has a rib portion extending along the axial direction on the outer peripheral surface of the cylindrical portion main body, the cross-sectional secondary moment is larger than that in the case of only the cylindrical portion main body. Thereby, the mechanical strength of the cylinder body is improved.
Furthermore, in the sheet pile pile of the present invention, since the main body is a tubular body having a hollow cross section, the contact area with the ground at the axial end of the sheet pile pile is smaller than that of a solid columnar pile. ing. Thereby, the resistance received from the ground when driving into the ground is reduced. Therefore, the sheet pile pile of the present invention can be easily driven into the ground manually by hitting the upper end, and is excellent in workability.

  In the sheet pile according to the present invention, it is preferable that the cylindrical body and the pair of joints are integrally formed of a light metal or a light metal alloy. In this case, processing such as cutting is easy, and the sheet pile can be further reduced in weight. Therefore, according to the sheet pile pile adopting such a configuration, large heavy machinery and processing tools can be easily transported to a construction place where it is difficult to carry in, and the sheet pile structure can be easily installed. Moreover, the sheet pile which employ | adopted this structure is excellent in durability.

  In the sheet pile according to the present invention, it is preferable that a pair of plane portions parallel to each other is formed on the outer peripheral surface of the cylindrical portion main body. In this case, since the contact area between the structure to be attached and the sheet pile is large, the structure can be firmly attached to the sheet pile.

  In the sheet pile according to the present invention, the pile portion main body is disposed along the first diameter direction of the cylindrical portion main body, and the pair of plane portions has a second diameter direction perpendicular to the first diameter direction as a normal direction. It may be arranged so that. When a plurality of sheet pile piles adopting such a configuration are connected by a joint portion to form a sheet pile structure, the planar portion is disposed on the front surface and the back surface of the sheet pile structure. Therefore, it is easy to attach a plate-like structure such as a sheet pile.

  In the sheet pile according to the present invention, one of the pair of joint portions is a tubular female joint portion having a long slit in the axial direction, and the other is a male that is slidably fitted to the slit in a retaining state. A joint part may be sufficient. In a sheet pile pile adopting such a configuration, when a plurality of sheet pile piles are connected to form a sheet pile structure, the fitting section of the other sheet pile pile is fitted to the fitting section of the joint section of one sheet pile pile. Easy to fit the parts.

  The sheet pile according to the present invention has an excellent effect of being excellent in mechanical strength and workability.

It is a schematic explanatory drawing which shows an example of the sheet pile structure using the sheet pile pile which concerns on one embodiment of this invention. It is a partially expanded perspective view of the sheet pile structure shown by FIG. It is a perspective view of a sheet pile pile concerning one embodiment of the present invention. (A) is a top view of the sheet pile pile concerning one embodiment of the present invention, and (b) is a front view of a sheet pile pile. (A) is a right view of the sheet pile pile which concerns on one embodiment of this invention, (b) is a left view of a sheet pile pile. It is sectional drawing in the A-A 'line | wire of FIG.4 (b).

[Sheet structure]
Hereinafter, a sheet pile structure using a sheet pile according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a schematic explanatory view showing an example of a sheet pile structure using a sheet pile pile according to an embodiment of the present invention. FIG. 2 is a partially enlarged perspective view of the sheet pile structure shown in FIG. In addition, the sheet pile structure 1 which concerns on this one Embodiment is continuing in the joint side direction in FIG.

The sheet pile structure 1 shown in FIG. 1 is a sheet pile structure used for simple water shielding in water areas such as marshes and rivers.
The sheet pile structure 1 has a structure in which a plurality of sheet pile piles 10 are connected in the radial direction of the sheet pile pile. The lower part of each of the sheet piles 10 is manually driven by striking the ground 40 below the water surface. In addition, water is blocked on the upstream side and the downstream side of the water area 30.

In this sheet pile structure 1, two adjacent sheet pile piles 10 are fitted with a fitting portion 14 of a joint portion 12 of one sheet pile pile 10 and a joint portion 15 of another sheet pile pile 10 as shown in FIG. 2. The joint part 17 is connected to each other by fitting.
And the clearance gap between the fitting part 14 and the fitting part 17 is filled with water-stopping agents, such as mortar and resin hardened | cured with progress of time.

[Structure of sheet pile]
Next, a sheet pile according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
3 is a perspective view of a sheet pile according to an embodiment of the present invention, FIG. 4 (a) is a plan view of the sheet pile, FIG. 4 (b) is a front view of the sheet pile, and FIG. 5 (a) is a sheet pile. FIG. 5B is a left side view of the sheet pile, and FIG. 6 is a cross-sectional view taken along the line AA ′ of FIG. The sheet pile 10 is continuous only in the axial direction in FIG. The rear view is the same as the plan view and is omitted.

The sheet pile 10 is composed of a cylindrical body 11 having a hollow cross section and a pair of joints 12 and 15 formed on the outer peripheral surface of the cylindrical body 11.
Since the main body of the sheet pile 10 is the cylindrical body 11 having a hollow cross section, it is lighter than a solid columnar pile.
Therefore, even if it is a construction place where it is difficult to carry a large heavy machine, the sheet pile 10 can be easily transported by human power.

  Moreover, since the main body of the sheet pile 10 is hollow in cross section, the strength per weight is increased. In addition, in the sheet pile pile 10, the surface area of the axial direction end portion that contacts the ground when driven into the ground is reduced, and the resistance that the sheet pile pile 10 receives from the ground when driven into the ground is reduced. Therefore, the sheet pile pile 10 can be easily driven into the ground by hitting the upper end of the sheet pile pile 10 manually with a driving tool such as a handy type electric hammer.

  The internal diameter of the cylinder part main body 11 is about 50-120 mm normally. The inner diameter can be appropriately set according to the use and installation location of the sheet pile structure 1, the type of structure attached to the sheet pile structure 1, and the like. Moreover, in FIG. 3, the radial direction thickness in the thinnest part of the cylinder part main body 11 is about about 3-6 mm normally. The said radial direction height can be suitably set according to the use of the sheet pile structure 1, an installation place, the conveyance property of the sheet pile pile 10, etc.

The pair of joint portions 12 and 15 are formed on the outer peripheral surface of the cylindrical portion main body 11. These joint portions 12 and 15 are arranged along the diameter direction (first diameter direction) of the cylindrical portion main body 11.
The joint portion 12 has a rib portion 13 extending along the axial direction on the outer peripheral surface of the tube portion main body 11 and a fitting formed at the tip of the rib portion 13 (one end on the radially outer side of the tube portion main body 11). It consists of a joint part 14. The fitting part 14 consists of a convex part with a T-shaped cross section, and is formed integrally with the rib part 13 (see FIG. 4A). The fitting portion 14 of the joint portion 12 of one sheet pile pile 10 is movable in the axial direction with respect to the joint portion 15 of the other sheet pile pile 10 and is not movable in the radial direction.
Further, the joint portion 15 is formed on the outer peripheral surface of the tubular portion main body 11 at the rib portion 16 extending along the axial direction, and the tip of the rib portion 16 (one end on the radially outer side of the tubular portion main body 11). And the fitting portion 17. The fitting part 17 consists of a recessed part of C-shaped cross section, and is formed integrally with the rib part 16 (refer Fig.4 (a)). The fitting portion 17 is formed in a tubular shape in the axial direction of the tubular body 11, and a long slit is formed in the axial direction of the tubular portion.

Thus, since the sheet pile pile 10 has the rib portions 13 and 16 extending along the axial direction on the outer peripheral surface of the cylindrical portion main body 11, the cross-sectional secondary moment is increased, and the mechanical strength is increased. It has improved.
The radial height of each of the rib portions 13 and 16 is usually about 10 to 20 mm. The said radial direction height can be suitably set according to the mechanical strength calculated | required by the sheet pile pile 10, the use of the sheet pile structure 1, the transportability of the sheet pile pile 10, etc.

  When a plurality of sheet piles 10 are connected to form the sheet pile structure 1, the joint portion 12 is used as a male joint portion, and the joint portion 15 is used as a female joint portion. That is, the fitting part 14 which consists of a convex part with a T-shaped cross section of the joint part 12 of one sheet pile pile 10, and the fitting part 17 which consists of a concave part with a C-shaped cross section of the joint part 15 of the other sheet pile pile 10. The fitting portion 14 can be slidably fitted to the slit of the fitting portion 17 in a state of being prevented from coming off by being inserted into the tube to be formed along the slit. Thereby, two adjacent sheet pile piles 10 can be connected easily.

In addition, a pair of plane portions 18 and 19 that are parallel to each other are formed on the outer peripheral surface of the cylindrical portion main body 11. These flat portions 18 and 19 are arranged such that a second diameter direction orthogonal to the first diameter direction is a normal direction thereof.
Therefore, when the sheet pile structure 1 is formed by connecting a plurality of such sheet pile piles 10, the plane portions 18 and 19 are disposed on the front side and the back side of the sheet pile structure 1, respectively. Therefore, it becomes possible to easily attach a plate-like structure such as a lateral sheet pile to the sheet pile 10.
Further, in the flat portions 18 and 19, it is easier to process a screw hole for attaching a structure along the normal line of the cylindrical body 11 than the circular arc-shaped portion of the cylindrical body 11. Yes. Moreover, since it is comprised in this way, since a contact area with a structure can be enlarged, it becomes easy to attach a structure.
The flat portions 18 and 19 are partially thick in the radial direction. Thereby, similarly to forming a rib in the outer peripheral surface of the cylinder part main body 11, a cross-sectional secondary moment becomes large and the mechanical strength of the sheet pile 10 is improved.

  The cylindrical part main body 11 and the joint parts 12 and 15 of the sheet pile 10 are integrally formed of an aluminum alloy. Therefore, combined with the fact that the main body of the sheet pile pile 10 is the cylindrical body 11 having a hollow cross section, the weight is further reduced. Moreover, since an aluminum alloy is easy to process and is less likely to corrode than wood or the like, the sheet pile 10 is excellent in workability and durability such as cutting.

The sheet pile 10 can be easily manufactured by extruding an aluminum alloy and integrally forming the cylindrical body 11 and the joint parts 12 and 15.
Further, an oxide film made of an alumite film is formed on the surface of the base material made of an aluminum alloy constituting the cylindrical body 11 and the joint parts 12 and 15 of the sheet pile 10. Thereby, in the sheet pile pile 10, the aged deterioration by the oxidation of the base material which consists of aluminum alloys is suppressed.

  Installation of the sheet pile structure 1 using the sheet pile 10 conveys a necessary amount of the sheet pile 10 to a construction site by human power, and uses a driving tool such as a handy type electric hammer to connect the joint portion 12 of one sheet pile 10. The sheet pile pile 10 can be manually driven into the ground while fitting the joint portion 15 of the other sheet pile pile 10 with each other. At this time, if necessary, processing such as cutting the sheet pile 10 can be performed.

[Modification]
In the said embodiment, although the joint parts 12 and 15 are arrange | positioned on the same normal line of the cylinder part main body 11, according to the shape of the sheet pile structure calculated | required in this invention, each arrangement | positioning of the joint parts 12 and 15 is provided. Can be set.

  In the present invention, the base material constituting the cylindrical body 11 and the joints 12 and 15 may be a light metal or another light metal alloy instead of the aluminum alloy.

  In the present invention, the surface of the base material of the sheet pile 10 is other than a plating film such as a hard chrome plating film or an electroless nickel plating film, or an alumite film in order to suppress the base material oxidation or surface damage. An oxide film may be formed.

  Furthermore, the cross-sectional shape of the fitting portions 14 and 17 of the joint portions 12 and 15 of the sheet pile 10 may be any shape that can be fitted to each other, and for example, both may have a C-shaped cross section.

  The sheet pile pile 10 of the present invention is not only used for simple water-impervious purposes but also used for various purposes such as earth retaining on sloped slopes, earth retaining on embankments, slope disaster prevention, avalanche prevention, tree rooting prevention, etc. Can do.

DESCRIPTION OF SYMBOLS 1 Sheet pile structure 10 Sheet pile pile 11 Tube part main body 12 Joint part 13 Rib part 14 Fitting part 12 Joint part 13 Rib part 14 Fitting part 18 Plane part 19 Plane part

Claims (5)

It is a sheet pile that can be driven manually into the ground by striking the upper end,
It has a cylindrical section body having a hollow cross section and a pair of joint portions formed on the outer peripheral surface of the cylinder section body.
The pair of joint portions are formed on the outer peripheral surface of the cylindrical portion main body along the axial direction, and are formed at the tips of the rib portions, and are axial with respect to the joint portions of the other sheet piles. A sheet pile pile characterized by having a fitting portion that can be moved in the direction and cannot be moved in the radial direction.   The sheet pile pile according to claim 1, wherein the cylindrical body and the pair of joint portions are integrally formed of a light metal or a light metal alloy.   The sheet pile pile according to claim 1 or 2, wherein a pair of plane portions parallel to each other is formed on the outer peripheral surface of the cylindrical portion main body. The pair of joint portions are arranged along a first diametric direction of the cylindrical portion main body,
The sheet pile pile according to claim 3, wherein the pair of plane portions are arranged such that a second diameter direction orthogonal to the first diameter direction is a normal direction.   2. One of the pair of joint portions is a tubular female joint portion having a long slit in the axial direction, and the other is a male joint portion that is slidably fitted to the slit in a retaining state. The sheet pile pile in any one of -4.

Images