JP6266997B2 - Pier construction method and steel pipe cap - Google Patents

Description

  The present invention relates to a pier construction method and a steel pipe cap.

A construction method for building a jetty using steel pipe piles is known.
In such a pier, for example, as shown in Patent Document 1 and Patent Document 2, a steel pipe cap is fixed to the head of a steel pipe pile, and a girder is placed on the steel pipe cap.

  The outline of the pier construction procedure using steel pipe piles is as follows. First, after disposing a steel pipe in the ground, the concrete is placed at the lower end of the steel pipe. Next, a steel pipe cap is installed on the head of the steel pipe (steel pipe pile), and a girder is placed on the steel pipe cap. And a pier is formed by installing a lining plate etc. on a girder.

JP 2004-285735 A JP 2010-059743 A

  In the construction method of the pier, the construction of the superstructure cannot be carried out until the construction of the solidified concrete is completed, which may hinder the shortening of the construction period.

  From such a viewpoint, an object of the present invention is to provide a pier construction method capable of early construction and a steel pipe cap used therefor.

  In order to solve the above-mentioned problems, a method for constructing a pier according to the present invention includes a step of arranging a steel pipe pile in the ground, a step of fixing a steel pipe cap to the head of the steel pipe pile, and a girder on the steel pipe cap. A step of placing a material, and a step of placing a reinforced concrete of the steel pipe pile, wherein the steel pipe cap has a through-hole that leads to the inner space of the steel pipe pile at a position avoiding the girder. It is formed, The said solidified concrete is characterized by placing in the lower end part of the said steel pipe pile using the said through-hole.

  According to the construction method of this pier, since the foundation concrete is cast using the through hole, the superstructure (girder) can be constructed before or simultaneously with the construction of the foundation concrete. Can be realized.

Further, the steel pipe cap of the present invention is fixed to the head of a steel pipe pile that performs solidification filling, and a flat plate on which a girder supported by the steel pipe pile is mounted, and the head of the steel pipe pile to a locking member to be engaged, the insertion has been hit設用hose through hole formed in said flat plate, and wherein the locking member is fixed to the lower surface of the flat plate, the through The hole is arranged at a position avoiding the girder, and the placing hose is arranged up to the lower end of the steel pipe pile .

According to such a steel pipe cap, even after the girders have been constructed, it is possible to place the steel pipe pile rooted concrete using the through holes.
That is, if the steel pipe cap of the present invention is used, the construction work of the superstructure can be advanced without being influenced by the construction of the solidified concrete, so that the construction period can be shortened.
Furthermore, since the filling of the root hardening material is performed from the lower end of the steel pipe pile by using a driving hose, the material is not separated, and thus can be performed with high quality.

  In addition, if the said steel pipe cap is provided with the cover material which shields the said through-hole, since it can prevent that rainwater etc. permeate into the inside of a steel pipe pile from a through-hole, the fall of quality can be prevented.

  According to the pier construction method of the present invention and the steel pipe cap used therefor, the construction period can be shortened.

It is a perspective view which shows the jetty which concerns on this embodiment. It is a figure which shows a steel pipe cap, Comprising: (a) is a front view, (b) is a top view. (A)-(d) is sectional drawing which shows each process of the construction method of the jetty of this embodiment.

  As shown in FIG. 1, the pier 1 of this embodiment includes a plurality of steel pipe piles 2, 2,..., Receiving girders (girder members) 3, 3 mounted on the steel pipe piles 2, 2,. 3 and 3 are supported by the lining plates 4, 4,.

The steel pipe pile 2 is embedded in the ground with the head protruding to the ground surface.
In addition, the standard of the steel pipe which comprises the steel pipe pile 2 is not limited, What is necessary is just to set suitably according to the scale of the jetty 1, a use, etc.

  A plurality of steel pipe piles 2 are arranged at predetermined intervals along the axial direction of the pier 1. The steel pipe piles 2 are arranged in a plurality of rows at a predetermined interval in a direction orthogonal to the axial direction of the pier.

A steel pipe cap 10 is fixed to the head of each steel pipe pile 2.
As shown in FIG. 2, the steel pipe cap 10 includes a flat plate 11 and a locking member 12.

The flat plate 11 is a steel plate placed on the upper end surface of the steel pipe pile 2. A receiving girder 3 supported by the steel pipe pile 2 is placed on the upper surface of the flat plate 11.
The flat plate 11 has an area larger than the outer shape of the steel pipe pile 2. The flat plate of the present embodiment is formed in a square in plan view, and the length of each side of the flat plate 11 is larger than the outer diameter of the steel pipe pile 2, but the shape of the flat plate 11 is not limited.

A through hole 13 is formed in the flat plate 11 at a position avoiding the receiving beam 3.
The through-hole 13 has an inner diameter capable of being inserted through a placing hose 5 for placing the rooted concrete of the steel pipe pile 2.

  The through hole 13 is formed so as to communicate with the inner space of the steel pipe pile 2. More specifically, as shown in FIG. 2 (b), the through-hole 13 is located farther from the center of the flat plate 11 than ½ of the width of the receiving beam 3, and the steel pipe pile 2. It is formed at a position on the inner side (center side) than the radius.

The locking member 12 is a member locked to the head of the steel pipe pile 2 and is fixed to the lower surface of the flat plate 11.
The locking member 12 of the present embodiment is configured by a steel pipe having an inner diameter larger than the outer diameter of the steel pipe pile 2. In addition, the locking member 12 does not necessarily need to be comprised with the steel pipe, For example, the board | plate material fixed to the lower surface of the flat plate 11 at intervals along the outer peripheral surface of the steel pipe pile 2 may be sufficient. Further, the locking member 12 may be formed so as to be insertable inside the steel pipe pile 12.

  The locking member 12 is made of a steel pipe welded to the lower surface of the flat plate 11. The head of the steel pipe pile 2 is inserted into the locking member 12. In this embodiment, the fixing degree of the flat plate 11 and the locking member 12 is increased by fixing the support members 14, 14,... To the corners between the lower surface of the flat plate 11 and the side surface of the locking member 12.

The support member 14 is formed of a triangular steel plate, and is disposed at equal intervals along the circumferential direction of the locking member 12.
In addition, what is necessary is just to install the supporting member 14 as needed. Moreover, the shape, arrangement | positioning, and number of the supporting member 14 are not limited.

  A bolt hole (not shown) for inserting the fixing bolt 15 is formed in the locking member 12. In the present embodiment, four bolt holes are formed in two upper and lower stages at equal intervals along the circumferential direction of the locking member 12. The arrangement and number of bolt holes are not limited. Moreover, what is necessary is just to form according to the fixing method of the steel pipe cap 10, and it does not necessarily need to be formed.

  The steel pipe cap 10 is fixed by tightening the fixing bolt 15 inserted through the bolt hole while covering the head of the steel pipe pile 2. In addition, the fixing method of the steel pipe cap 10 is not limited to the fastening with the fixing bolt 15, and may be welded, for example.

  As shown in FIG. 1, the receiving girder (girder) 3 is made of I-shaped steel formed by a pair of flanges and a web. In addition, the material which comprises the receiving girder 3 is not limited, For example, H-section steel and groove type steel may be sufficient.

  The receiving girder 3 is a support member for the lining plate 4 and is disposed across the plurality of steel pipe piles 2. The receiving girder 3 is fixed to the flat plate 11 as required. At this time, the method of fixing the receiving beam 3 to the flat plate 11 is not limited, and for example, it may be welded or fixed via a jig.

  The receiving girder 3 may be mounted on the steel pipe pile 2 via a girder horizontally mounted on the steel pipe pile 2 in a direction orthogonal to the axial direction of the pier. Moreover, the adjacent receiving beams 3 and 3 may be connected by a horizontal beam as needed.

The lining plate 4 is a steel plate-like (plate-like) member, and is laid across the upper surfaces of the adjacent receiving girders 3 and 3.
The road surface of the pier 1 is formed by the plurality of lining plates 4, 4,.

The lining plate 4 is fixed to the upper flange of the receiving beam 3 through a jig (not shown). In addition, the fixing method of the lining plate 4 is not limited, For example, you may weld.
Moreover, the shape dimension of the lining plate 4 is not limited. Moreover, the lining plate 4 may be arrange | positioned ranging over the 3 or more receiving girder 3, 3, ....

Hereinafter, the construction method of the pier of this embodiment is demonstrated.
The construction of the pier 1 includes a pile driving process, a cap fixing process, an upper construction process, and a driving process.

A pile driving process is a process of forming the steel pipe pile 2 by arrange | positioning a steel pipe in the underground G, as shown to (a) of FIG.
The construction method of the steel pipe pile 2 is not limited and may be performed by, for example, a boring hole method, a batting method, a Nakabori method, a rotating method, or the like.

The cap fixing step is a step of fixing the steel pipe cap 10 to the head of the steel pipe pile 2 as shown in FIG.
The steel pipe cap 10 is fixed by tightening the fixing bolt 15 with the steel pipe cap 10 placed on the head of the steel pipe pile 2. The fixing bolt 15 is inserted in the bolt hole, and then tightened in a state where the tip is in contact with the side surface of the steel pipe pile 2.

At this time, the through hole 13 of the steel pipe cap 10 is shielded by the lid member 16.
In addition, what is necessary is just to install the cover material 16 as needed.

  The superstructure process is a process of placing a girder (spar) 3 on the steel pipe cap 10 as shown in FIG.

The receiving girder 3 is arranged so that the center line of the receiving girder 3 coincides with the center line of the flat plate 11 (center of the steel pipe 2). That is, the receiving beam 3 is placed at a position where the through hole 13 of the flat plate 11 is avoided.
After the receiving girder 3 is placed on the steel pipe cap 10, the lining plate 4 is subsequently applied.

The placing step is a step of placing the rooted concrete 6 of the steel pipe pile 2 as shown in FIG.
The solidified concrete 6 is placed on the lower end portion of the steel pipe pile 2 by using a placement hose 5 inserted through the through hole 13.

The placing hose 5 has a length that allows the tip to reach the lower end of the steel pipe pile 2 in the interior.
The placement of the root hardening concrete 6 is performed in a state where the tip of the placement hose 5 is disposed at the lower end of the steel pipe pile 2, and as the placement surface of the root consolidation concrete 6 rises, the placement hose 5 Do it while raising.

  In addition, the mixing | blending of the solidified concrete 6 is not limited. Moreover, the solidified concrete 6 of this embodiment shall also contain mortar and grout. The placement amount of the solidified concrete 6 is set as appropriate.

  When the construction of the solidified concrete 6 is completed, the placing hose 5 is extracted from the through-hole 13 and the through-hole 13 is closed with the lid 16.

  As described above, according to the pier construction method and the steel pipe cap according to the present embodiment, since the rooting concrete 6 is cast using the through-hole 13 formed at a position avoiding the receiving girder (spar) 3, Regardless of the presence or absence of the girder 3, the concrete foundation 6 can be constructed.

  Therefore, since the superstructure (girder and lining plate 4) can be constructed before or simultaneously with the construction of the reinforced concrete 6, the construction period can be shortened. Therefore, it is possible to proceed with the superstructure without being affected by the timing of carrying in concrete (including mortar), and it is possible to quickly construct a temporary pier that requires rapid construction.

  Since the concrete foundation 6 is cast from the lower end of the steel pipe pile 2 by using the hose 5 for casting, the material is not separated, and therefore can be performed with high quality.

  Moreover, by shielding the through-hole 13 of the steel pipe cap 10 with the cover material 16, it is possible to prevent rainwater and the like from entering the inside of the steel pipe pile 2, and to suppress deterioration in quality due to rainwater and the like.

Since the installation of the steel pipe cap 10 is completed simply by covering the head of the steel pipe pile 2 and tightening the fixing bolt 15, it can be performed easily and quickly.
Moreover, since the structure of the steel pipe cap 10 is simple, it can be manufactured at low cost.

  The embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and the above-described components can be appropriately changed without departing from the spirit of the present invention.

  You may form the through-hole which leads to the natural ground G in the lower end part of the steel pipe which comprises the steel pipe pile 2. As shown in FIG. If it does in this way, since the solidified concrete 6 comes to ooze out from a through-hole, the solidified concrete 6 can be driven also to the outer peripheral surface of the lower end part of the steel pipe pile 2. FIG.

1 Pier 2 Steel pipe pile 3 Girder (girder)
DESCRIPTION OF SYMBOLS 4 Covering plate 5 Placing hose 6 Root concrete 10 Steel pipe cap 11 Flat plate 12 Locking member 13 Through-hole 14 Support member 15 Fixing bolt 16 Cover material

Claims (3)

Arranging a steel pipe pile in the ground;
Fixing a steel pipe cap to the head of the steel pipe pile;
Placing the girders on the steel pipe cap;
A method of placing a pierced concrete of the steel pipe pile, and a construction method of a pier comprising:
In the steel pipe cap, a through hole that leads to the inner space of the steel pipe pile is formed at a position avoiding the girder,
The method for constructing a pier, characterized in that the cemented concrete is placed at the lower end of the steel pipe pile using the through hole. A steel pipe cap fixed to the head of a steel pipe pile that performs solidification filling ,
A flat plate on which girders supported by the steel pipe piles are mounted;
A locking member locked to the head of the steel pipe pile;
A placing hose inserted through a through hole formed in the flat plate;
With
The locking member is fixed to the lower surface of the flat plate,
The through-hole is arranged at a position avoiding the girder,
The steel pipe cap, wherein the driving hose is disposed up to a lower end portion of the steel pipe pile . The steel pipe cap according to claim 2, further comprising a lid member that shields the through hole.

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