JP3132184U - Pile cap for steel pipe soil cement pile construction - Google Patents

Abstract

[PROBLEMS] In the construction of steel pipe soil cement pile, it is possible to eliminate the lifting work of solidified concrete on the pile head of the steel pipe built in the excavated vertical hole filled with liquid solidifying material, reducing labor, and a series of An object of the present invention is to provide a pile cap for steel pipe soil cement pile construction that enables efficient construction work.
A pile cap (1) according to the present invention is housed in a cylindrical body (2) provided on at least a cylindrical body (2), an upper lid (3) and a lower lid (4) for closing both end openings of the cylindrical body (2), and an inner surface of the lower lid (4). A lifting member 5, a flexible upper plate 6 provided on the outer surface side of the upper lid 3 to open and close the hole 13 formed in the upper lid 3, and provided on the outer surface side or inner surface side of the lower lid 4. And a flexible lower plate 7 that can open and close the hole 14 that is opened.
[Selection] Figure 1

Description

  The present invention relates to a pile cap for steel pipe soil cement pile construction that is temporarily installed on the pile head (tip portion) of a steel pipe to be built in an excavated vertical hole during construction of a steel pipe soil cement pile (synthetic steel pipe pile). Is.

  The construction of steel pipe soil cement piles is to fill a vertical hole with a predetermined depth formed by excavating the ground while stirring the soil cement (cement, soil, etc.) at construction sites such as piers, abutments, buildings, condominiums, etc. In this construction, a steel pipe is built, and a soil pile that solidifies with time and the above steel pipe are integrated to construct a foundation pile excellent in bearing capacity performance and earthquake resistance performance.

  In the construction of this steel pipe soil cement pile, conventionally, a plurality of steel pipes connected by welding in a vertical hole filled with soil cement (cement milk) are built in sequence, and the pile head (tip part) of the steel pipe on the uppermost side is installed. The soil cement is solidified with the passage of time, and then the solid soil cement in the pile head is removed by a lifting operation, and the ground is placed in the hollow pile head. The lower part of the pillar to be projected is built.

  However, as described above, after the soil cement 102 filled in the vertical hole 101 (FIGS. 6A and 6B) is solidified and integrated with the steel pipe 103, the pile head 104 of the uppermost steel pipe 103 is obtained. The solidified soil cement 102a had to be removed by a suspending operation, which required labor and a long time. For this reason, the suspension work of the solidified soil cement 102a has been a major factor that hinders work efficiency in the construction of steel pipe soil cement piles.

  The present invention was developed in view of the above points. In the construction of a steel pipe soil cement pile, the solidified liquid solidified material of the steel pipe pile head built in the excavated vertical hole filled with the liquid solidified material. Providing pile caps for steel pipe soil cement pile construction that can eliminate lifting work, greatly reduce labor compared to conventional construction, and allow a series of construction work to be performed efficiently That is the issue.

  In order to solve the above-described problems, a pile cap for construction of a first steel pipe soil cement pile according to the present invention includes at least a cylinder, an upper lid and a lower lid that close both ends of the cylinder, and an inner surface of the lower lid. A lifting member that is housed in the cylindrical body, a flexible upper plate that is provided on the outer surface side of the upper lid and that opens and closes a hole formed in the upper lid, and is provided on the outer surface side or inner surface side of the lower lid. It consists of a structure provided with a flexible lower plate that can open and close a hole opened in the lid.

  The pile cap for construction of the second steel pipe soil cement pile of the present invention is the above-described pile cap construction for construction of the first steel pipe soil cement pile of the present invention, wherein a lifting member for lifting is provided on the outer peripheral surface of the cylindrical body. It consists of the composition.

  The pile cap for the construction of the third steel pipe soil cement pile of the present invention is a structure of the pile cap for the construction of the first or second steel pipe soil cement pile of the present invention. A rubber plate member having a shape, wherein the flexible upper plate is provided with one side fixed to the outer surface side of the upper lid so as to cover the hole, and the flexible lower plate covers the hole In this manner, the vicinity of the outer peripheral edge is provided by being fixed to the outer surface side of the lower lid with a stopper member, and a cut portion through which the liquid solidifying material can pass is provided at the position of the hole.

  The pile cap for the first steel pipe soil cement pile construction of the present invention is inserted into the pile head (tip part) of the steel pipe to be built in the vertical hole filled with liquid solidification material when constructing the steel pipe soil cement pile. The lower lid that escapes the pressure from the bottom due to the water pressure of the liquid solidification material when it is built through the flexible lower plate that can be opened and closed even if the steel pipe is installed in the vertical hole by fixing by welding etc. The liquid solidified material flows into the pile cap only a little from the hole opened in the hole, and even if the internal pressure of the pile cap rises, the flexible lower plate is opened and vented from the hole in the upper lid. To prevent the pile cap from lifting and the like, and even if the liquid solidification material solidifies after the steel pipe is built, remove the top lid and lift the lifting member in the cylinder with a crane etc. By removing Most solidified liquid solidified material within the pile head (concrete) is not, like a conventional can without performing fishing operations, it is possible to efficiently set of construction work.

  Moreover, in the pile cap for construction of the second steel pipe soil cement pile of the present invention, a suspension member for lifting is provided on the outer peripheral surface of the cylinder so that the suspension member can be inserted into the pile head of the steel pipe. It can be easily lifted and constructed by a crane or the like, and the work can be performed easily and quickly.

Furthermore, in the pile cap for construction of the third steel pipe soil cement pile of the present invention, one side of the flexible upper plate (rubber plate member) is covered with a hole on the upper lid, and the outer side of the upper lid is covered with a stopper. Because it is fixed to the pile cap, when the internal pressure of the pile cap rises, it jumps up so as to bend from the end side that is not fixed to the upper lid of the flexible upper plate, opens the hole of the upper lid, and lowers the internal pressure Can lift the lifting force of the pile cap.
Further, the vicinity of the outer peripheral edge of the flexible lower plate (rubber plate member) is provided on the outer surface side of the lower lid so as to cover the hole of the lower lid, and the liquid solidifying material is provided at the position of the hole. Since there is a notch that can pass through, when the steel pipe is built in the vertical hole filled with the liquid solidifying material, the liquid solidifying material is pressed through the notch by the pressure of the liquid solidifying material from below. By slightly injecting into the pile cap, it is possible to release the pushing-up force from below on the pile cap, and it is possible to prevent the steel pipe from floating in the liquid solidified material.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
1 is a perspective view showing a pile cap for constructing a steel pipe soil cement pile according to the best mode for carrying out the present invention, FIG. 2 is a plan view seen from the upper side of the upper lid, and FIG. 3 is a lower side of the lower lid. FIG. 4 is an explanatory view of a steel pipe soil cement pile when the pile cap of the present invention is used, and FIG. 5 is an explanatory view of removing the pile cap of the present invention from the steel pipe. The pile cap 1 (FIG. 1) includes a cylindrical body 2, an upper lid 3, a lower lid 4, a lifting member 5, a flexible upper plate 6, a flexible lower plate 7, a hanging member 8, a floating member 9 and a plurality of retaining members. It is comprised by the member (screw screws 10 and 11).

  The cylinder 2 is a cylindrical thing which consists of a steel plate formed in the outer diameter smaller than the internal diameter of the steel pipe 12 (FIG. 4) which comprises a steel pipe soil cement pile. For example, when the inner diameter of the steel pipe 12 is 1300 cm, the cylinder 2 has an outer diameter of 1150 cm, a height of 1500 cm, and a thickness of 19 mm. When the inner diameter of the steel pipe 12 is 1000 cm, the cylinder 2 has an outer diameter of 750 cm, a height of 1500 cm and a thickness of 19 mm is used. Of course, the cylindrical body 2 is not limited to the above outer diameter as long as it can be inserted into the steel pipe 12, and can be freely changed to other outer diameters, and the height and thickness can also be freely changed. .

  The upper lid 3 and the lower lid 4 (FIGS. 1 to 3) are circular steel plates that are fixed to both ends of the cylindrical body 2 by welding and close both-end openings. One hole 13, 14 is formed in the center of the upper lid 3 and the lower lid 4, respectively. The holes 13 and 14 are provided for allowing air in the cylinder 2 to escape and for allowing the liquid solidifying material 15 (cement milk or the like) (FIG. 4) to flow into the cylinder 2.

  The lifting member 5 (FIGS. 1 and 4) is formed by bending a steel bar into a size that can be accommodated in the cylindrical body 2 and is formed in a pair, and is formed on the inner surface (upper surface) of the lower lid 4 It is fixed by welding in an inverted U shape so as to confront each other with a predetermined interval.

  The flexible upper plate 6 and the flexible lower plate 7 (FIGS. 1 to 4) are 200 mm square square rubber plates having a thickness of 3.2 mm, and each of the holes 13 of the upper lid 3 and the lower lid 4 described above, 14 can be completely covered.

  The flexible upper plate 6 is placed so as to cover the hole 13 on the outer surface (upper surface) of the upper lid 3, and both corners on one desired side are fixed to the upper lid 3 with screw screws 10. When the internal pressure in the cylindrical body 2 rises, the flexible upper plate 6 jumps up like air by air discharged from the holes 13 and prevents the pile cap 1 from being lifted.

  The flexible lower plate 7 is fixed to the lower lid 4 with screw screws 11 so as to cover a hole 14 formed in the central portion of the lower lid 4, and a + -shaped cut portion is formed in the central portion. 16 is formed. The cut portion 16 of the flexible lower plate 7 is located in the hole 14 of the lower lid 4, and the pile cap 1 is provided on the pile head 12 a of the steel pipe 12 (FIG. 4) to be filled with the liquid solidification material 15. When installed in the vertical hole 18, the cut portion 16 is opened upward by pressing the liquid solidifying material 15 from below, and the liquid solidifying material 15 is caused to flow into the cylinder 2 from below the pile cap 1. Reduce the push-up force.

  The suspension member 8 (FIGS. 1 and 4) is formed by bending a steel rod into a U shape (or a ring shape or the like), and is formed in an inverted U shape at two opposite locations on the upper outer peripheral surface of the cylinder 2. It is fixed by welding.

  The buoyant member 9 (FIGS. 1 and 4) is made of two elongated steel plates, and is arranged on the outer surface of the upper lid 3 at a predetermined interval, and has both end portions 17 protruding slightly from the outer periphery of the upper lid 3. It is formed by bending downward at a right angle.

  The pile cap 1 of the present invention has the above-described configuration. When a steel pipe soil cement pile is constructed, a steel pipe constituting a steel pipe soil cement pile is lifted by a crane via a wire or the like on a suspension member 8. The cylindrical body 2 is inserted into the twelve pile heads 12a, and both end portions 17 of the floating member 9 located outside the steel pipe 12 are fixed to the outer peripheral surface of the steel pipe 12 by welding.

  Thus, the steel pipe 12 which provided the pile cap 1 in the pile head part 12a is built in the vertical hole 18 with which the liquid solidification material 15 was filled (FIG. 4). At this time, a small amount of the liquid solidifying material 15 flows into the cylindrical body 2 and into the gap between the steel pipe 12 and the pile cap 1 from the cut portion 16 of the flexible lower plate 7 and the hole 14 of the lower lid 4. And the liquid solidification material 15 solidifies when the steel pipe 12 is built and predetermined time passes.

Thereafter (FIGS. 4 and 5 a to d), the floating member 9 fixed to the outer peripheral surface of the steel pipe 12 by welding is removed, and the upper lid 3 is removed from the cylindrical body 2. Then, a hanging wire is hooked on the lifting member 5 in the pile cap 1 and lifted by a crane or the like, and the pile cap 1 from which the floating member 9 and the upper lid 3 have been removed is removed from the pile head 12 a of the steel pipe 12.
As a result, a cylindrical space is formed in the pile head portion 12a of the steel pipe 12, and if a small amount of concrete solidified and adhered to the inner surface of the pile head portion 12a is attached, the liquid solidified solidified on the pile head portion 12a. The steel pipe 12 that is not clogged with the material 15 can be easily obtained, the suspension work can be reduced, and the construction work of a series of steel pipe soil cement piles can be performed easily and quickly, greatly improving the work efficiency. be able to.

  In the pile cap of the present invention, the notch 16 of the flexible lower plate 7 is not limited to a + -like notch, but is normally closed naturally and is pressed from below by the liquid solidifying material 15. As long as the liquid solidifying material 15 can be allowed to flow into the pile cap 1 through the hole 14 of the lower lid 4, any shape of cut may be used. The flexible lower plate 7 may be fixed to the inner surface (upper surface) of the lower lid 4. Furthermore, what is necessary is just to form so that the diameter of the cylinder 2 can be inserted in the pile head part 12a according to the diameter of the steel pipe to build. Further, the height (length) of the cylindrical body 2 may be appropriately formed, and the thicknesses of the cylindrical body 2, the upper lid 3, and the lower lid 4 are not particularly limited. Furthermore, the flexible upper plate 6 and the flexible lower plate 7 are not limited to rubber plates, and may be soft resin plates having resilience. Further, the size, position, and number of the holes 13 and 14 formed in the upper lid 3 and the lower lid 4 can be freely changed in design to a size other than those shown in the figure.

It is a perspective view of the pile cap for steel pipe soil cement pile construction concerning this invention. It is the top view seen from the upper side of the upper cover. It is the top view seen from the lower side of the lower cover. It is explanatory drawing at the time of steel pipe soil-cement pile construction at the time of using the pile cap of this invention. It is the explanatory view simplified when removing the pile cap of this invention from a steel pipe. It is explanatory drawing which shows the suspension process in the conventional steel pipe soil cement pile construction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pile cap 2 Cylindrical body 3 Upper lid 4 Lower lid 5 Lifting member 6 Flexible upper plate 7 Flexible lower plate 8 Hanging member 9 Floating member 10, 11 Stopping member (screw screw)

Claims (3)

  At least the cylinder, upper and lower lids for closing both end openings of the cylinder, a lifting member provided on the inner surface of the lower lid and housed in the cylinder, provided on the outer surface side of the upper lid, and opened on the upper lid A flexible upper plate that opens and closes the hole, and a flexible lower plate that is provided on the outer surface side or the inner surface side of the lower lid so that the hole opened in the lower lid can be opened and closed. Pile cap for steel pipe soil cement pile construction.   2. The pile cap for steel pipe soil cement pile construction according to claim 1, wherein a lifting member for lifting is provided on the outer peripheral surface of the cylindrical body.   The flexible upper plate and the flexible lower plate are rectangular rubber plate members, and the flexible upper plate is fixed to the outer surface side of the upper lid with a stopper member so as to cover the hole. The flexible lower plate is provided by fixing the vicinity of the outer peripheral edge to the outer surface side of the lower lid with a stopper member so as to cover the hole, and provided with a cut portion through which the liquid solidifying material can pass at the position of the hole A pile cap for steel pipe soil cement pile construction according to claim 1 or 2, characterized in that.

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