JPH11256595A - Anchor frame made for steel bridge pier and footing using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steel-bridge-pier anchor frame and a footing which are structurally simple and easy to construct. SOLUTION: Each steel-bridge-pier anchor frame 10 comprises a lower anchor girder 3 connected to an upper anchor girder 6 by coupling bolts 7, the lower anchor girder 3 having shape holding materials 2, 5 secured to distribution plates 1, 4. A footing using the steel bridge pier anchor frames 10 is obtained when the plurality of anchor frames 10, each having the lower anchor girder 3 which has the shape holding members 2, 5 secured to the distribution plates 1, 4 and which is coupled to the upper anchor girder 6 by the coupling bolts 7, are buried in footing concrete.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is based on a structure consisting of an anchor girder having a shape retaining material fixed to a supporting plate and a connecting bolt, and is simple in structure and intended to have necessary strength. The present invention relates to a frame and footing using the same.

[0002]

2. Description of the Related Art A conventionally known anchor frame 23 is known.
Is a lower anchor girder 16 filled with cement mortar in a box-shaped anchor assembled by welding steel,
An upper anchor girder 17 filled with cement mortar in a box-shaped anchor assembled by welding steel is connected by a connecting bolt 18.

The anchor frame 23 is buried in a footing concrete 19 to form a footing structure 20.
The steel pier 22 was fixed to this via the base plate 21 (FIG. 11).

[0004]

However, the conventional footing anchor frame has a complicated structure, requires not only a wide range of materials to be used, but also requires a cement mortar to be filled in the box-shaped anchor. There was a problem. Since the cement mortar is injected from the through hole provided in the box anchor, it is unknown whether the cement mortar has been filled to all corners of the box anchor.If the filling is insufficient, the strength of the anchor is insufficient. There is a risk of failure, and there is a problem that the cost, labor, and time increase when the work is performed while performing filling detection and the like.

[0005]

An object of the present invention is to provide an anchor girder comprising a support plate made of a thick plate such as a steel plate and a shape retaining material for positioning the support plate and a connecting bolt (anchor bolt). By using this, an anchor frame for a steel pier was formed, and footing was formed using the anchor frame for a steel pier, so that the above-mentioned conventional problems could be completely eliminated.

That is, a lower anchor girder formed by fixing a shape holding material to the upper surface of the support plate and an upper anchor girder formed by fixing the shape holding material to the lower surface of the support plate are connected by connecting bolts. By connecting a lower anchor girder formed by forming an anchor frame for a steel pier or by fixing a shape holding material on the upper surface of a supporting plate and a shape holding material above the lower anchor girder with a connecting bolt, By constructing the anchor frame for the pier, the number of parts is small, the structure is simple, the production weight can be reduced, the labor time required for the construction can be significantly reduced, the workability of construction is good, and the construction cost is good. Thus, it is possible to provide an anchor frame for a steel pier having required strength while exhibiting effects such as lowering the cost. Also, in the steel bridge pier anchor frame, the upper and lower anchor girders also include the supporting plate, or a plurality of the upper and lower anchor girders also include the supporting plate, and the lower anchor girder includes the supporting plate only. By combining and embedding in footing concrete to configure footing,
The workability of construction is good, the construction cost is low, and at the same time, it is possible to provide a footing having a necessary strength.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a lower anchor girder 3 formed by fixing a shape holding material 2 on the upper surface of a supporting plate 1 made of a thick plate such as a steel plate, and a support plate formed of a thick plate such as a steel plate. An anchor frame 10 for steel bridge piers is formed by connecting, with connecting bolts 7, an upper anchor girder 6 formed by fixing a shape retaining material 5 to the lower surface of the pressure plate 4. As a result, the number of components can be significantly reduced as compared with the conventional anchor frame, and the welding portion when configuring the anchor frame 10 is only the fixing portion between the supporting plate and the shape retaining material. Therefore, the welding length can be greatly reduced. Further, the supporting plate 1 of the lower anchor girder 3 resists an external force pulling the connecting bolt (anchor bolt) 7 upward, and an external force pressing the connecting bolt (anchor bolt) 7 downward. The support plate 4 of the upper anchor girder 6 resists. That is, the pull-out force is removed by the support plate 1 of the lower anchor girder 3,
Since the pushing force can be removed by the support plate 4 of the upper anchor girder 6, the strength required for the anchor frame can be secured.

In addition, when the external force pressing downward is small,
Alternatively, when it is not necessary to handle the external force of pressing down, the lower anchor girder 3 formed by fixing the shape holding material 2 to the upper surface of the support plate 1 and the shape holding material above the lower anchor girder 3 5 can be connected by connecting bolts to form a steel bridge pier anchor frame 10a.

As the shape holding members 2 and 4 described above, an angle material or a channel material can be considered, but any material having a strength for preventing deformation of the supporting plates 1 and 4 can be used.

Next, footing proposed by the present invention is as follows.
At least one of the anchor frames 10 for steel piers including the supporting plates 1 and 4 for both the upper and lower anchor girders 3 and 6 or the anchor frame 10 for the steel pier including the supporting plates 1 and 4 for both the upper and lower anchor girder 3 and 6. A combination of one or more and the anchor frame 10a for the steel pier including the supporting plate 1 only in the lower anchor girder 3 is embedded in the footing concrete to form the footing. Thereby, the workability of construction is good, the construction cost is low, and at the same time, it is possible to provide the footing having the required strength.

In the above, when a plurality of steel pier anchor frames 10, 10a are buried in footing concrete, the plurality of steel pier anchor frames 10, 10a are taken into account in consideration of external forces acting on the bridge shaft from different directions. Are arranged around the bridge axis in different directions, preferably in an annular shape when viewed in plan. At this time, if the plurality of steel pier anchor frames 10, 10a can be arranged on the same vertical plane, the plurality of steel pier anchor frames 10, 10a are
It is preferable that they are connected to each other and arranged continuously in an annular shape. However, if it is not possible to arrange them consecutively because of the presence of the other structural members 26, they can be arranged without being continuous, and can be arranged in a U-shape when viewed in a plane instead of being annular. They can also be arranged in a crescent shape or the like. Further, if the plurality of steel pier anchor frames 10, 10a cannot be arranged on the same vertical plane due to the presence of the other structural member 26, they can be arranged on different vertical planes.

In the above description, the annular shape on which a plurality of steel pier anchor frames are arranged is circular or square in plan view, but may be rectangular or elliptical.

[0013]

Embodiment 1 An embodiment of an anchor frame for a steel pier according to the present invention will be described with reference to FIGS. C at the top of the support plate 1
The channel material 2 (shape retaining material) is fixed by welding to form the lower anchor girder 3. An upper anchor girder 6 is formed by welding and fixing a C channel material 5 to a lower portion of the support plate 4, and the lower anchor girder 3 and the upper anchor girder 6 are vertically moved by connecting bolts 7, 7 and nuts 8, 8. Anchor frame 1 for steel bridge piers connected at predetermined intervals
0.

A steel bridge pier 9 is provided above the connecting bolts 7,7.
If the base plate 11 is fixed, the anchor frame 10 and the steel pier 9 can be connected. In the figure, reference numerals 12 and 12 denote bracing metal fittings disposed between the lower anchor girder 3 and the upper anchor girder 6. In FIG. 2, reference numeral 15 denotes a connecting member for the C channel members 2 and 5.

As shown in FIGS. 5, 6, 7, and 8, a plurality of steel bridge pier anchor frames 10 constructed as described above are arranged around the bridge shaft, and these are buried in footing concrete. To form a footing for the pier.

[0016]

Embodiment 2 The embodiment of FIG. 3 illustrates another anchor frame 10a for a steel pier according to the present invention.

A lower anchor girder 3 is formed by welding and fixing a C channel material 2 (shape retaining material) on the upper part of the support plate 1. A shape retaining material (for example, a C-channel material) 5 is arranged above the lower anchor girder 3, and the two are connected to each other with connecting bolts 7, 7 and nuts 8, 8 at predetermined intervals so as to anchor the steel pier. The frame 10a is configured. The shape maintaining material 5 plays a role of positioning the connection bolts 7, 7.

A steel bridge pier 9 is provided above the connecting bolts 7,7.
If the base plate 11 is fixed, the anchor frame 10a and the steel pier 9 can be connected. In the figure, reference numerals 12 and 12 denote bracing metal fittings disposed between the lower anchor girder 3 and the shape retaining material 5.

When the external force for pressing down is small, or when it is not necessary to handle the external force for pressing down,
It is also effective to configure the steel pier anchor frame in this way.

The steel bridge pier anchor frame 10a constructed in this manner is, as shown on the left side of another structure 26 in FIG. 5 or FIG.
Used together with at least one or more of the steel pier anchor frames 10 described above, and disposed around a bridge axle, and buried in footing concrete to form a pier footing.

[0021]

Embodiment 3 An embodiment of footing according to the present invention will be described with reference to FIG. An anchor for a steel bridge pier formed by connecting a supporting plate 1, a lower anchor girder 3 made of a shape retaining material 2, and an upper anchor girder 6 made of a supporting plate 4 and a shape retaining material 5 with connecting bolts 7 and nuts 8. A plurality of frames 10 are arranged around the bridge axis, and the footing concrete 1
3, the footing 14 of the present invention is constructed. 9 is a steel bridge pier, 11 is a base plate, and is connected with the connection bolt 7.

In the above embodiment, the steel pier 9 is indicated by an arrow 24.
When an external force pulling in the direction of is applied, the connecting bolt 7,
When the supporting plate 1 resists via the pier 7 and a pressing force is applied to the steel pier 9 from the direction of arrow 25, the supporting plate 4 resists, so that the purpose of the footing 14 can be achieved.

When the footing of the present invention is constructed as described above, a plurality of steel bridge pier anchor frames 10, 1 are taken in consideration of external forces acting on the bridge shaft from all directions.
It is preferable that 0 is annularly arranged around the bridge axis and then buried in the footing concrete 13. At this time, if a plurality of steel pier anchor frames 10 and 10 can be arranged on the same plane, as shown on the right side of another structure 26 in FIG. 5 or FIG. , 10 are preferably connected and arranged continuously. However, if it is not possible to arrange them continuously because of the other structures 26, etc., FIG.
Alternatively, as shown on the left side of the other structures 26 in FIG. 7, even if they are arranged apart from each other, the strength capable of sufficiently supporting the steel pier can be exhibited. At this time, the vertical positions at which the anchor frames for steel piers are arranged may be different vertical planes (arranged at different vertical heights). When the plurality of anchor frames 10, 10 for steel piers cannot be annularly arranged due to the presence of another structure 26, as shown in FIG. Even so, it can exhibit sufficient strength to sufficiently support the steel pier. When it is not possible to arrange a plurality of steel bridge pier anchor frames 10 and 10 in succession due to the presence of other structures, they are arranged separately from each other, as shown in FIG. Although the side anchor girder-3 and 3 cannot be connected, the upper anchor girder
6, 6, 6 can be connected.

The steel pier anchor frame 10a described in the second embodiment is effective when the external force for pressing downward is small or when it is not necessary to handle the external force for pressing downward. It is not preferable to configure footing corresponding to one bridge axis only by the anchor frames 10a. Even when a plurality of anchor frames 10a are used, the left side of the other structure 26 in FIG. 5 or FIG. As shown in the drawing, it is preferable that at least one steel bridge pier anchor frame 10 described in the first embodiment is included. In FIG. 5, the anchor frame 10a for the steel pier described in the second embodiment is used for the upper anchor frame in the drawing, and for the lower anchor frame on the left side of the other structure 26 in FIG. 7, respectively. I have.

In FIGS. 5 and 6, a plurality of anchor frames are arranged in a ring shape (square) in plan view, and in FIG. 7, a plurality of anchor frames are arranged in U-shape in plan view. Considering the external force, the anchor frame 1
It is preferable to arrange 0, 10a in different directions. For example, in the arrangement example shown in FIG. 5, the upper and lower anchor frames 10a and 10 play a role of receiving external force in the bridge axis direction, and the left and right anchor frames 10 and 10 play a role of receiving external force in the direction perpendicular to the bridge axis. Fulfill.

In addition, a plurality of anchor frames 1 for steel piers
When 0 and 10a are arranged with their directions different from each other, the arrangement method is required not only to change the directions so as to be orthogonal to each other as shown in FIGS. In consideration of strength, arrangement of other structures, and the like, various angles can be maintained and the orientation can be changed.

When the directions are different from each other, as shown in FIGS. 5, 6, and 7, in addition to the arrangement in which the anchor frames do not overlap each other, as shown in FIG. By using one connecting bolt 7 to connect and fix the upper and lower anchor girder of one anchor frame, the upper and lower anchor girder of the other anchor frame is also inserted into the connecting bolt 7 to obtain a plurality of bolts. It is also possible to adopt a configuration in which the anchor frames are arranged in different directions while intersecting each other at different heights in the vertical direction.

FIG. 8 shows an embodiment 1 of the present invention.
Alternatively, a case where an anchor frame for a cylinder is formed using the anchor frame described in the second embodiment will be described. As shown in FIG. 8, the anchor frame of the present invention may be arranged in a circular shape when viewed in a plane, and buried in a footing concrete to form a footing for a pier of the present invention.

In any of the above structures, the pushing force and the pulling force from the connecting bolts 7, 7 are transmitted (removed) to the footing concrete via the supporting plate 1 or 6 made of one thick plate. , Supporting plates 1 and 6 and connecting bolts 7 and 7
(Shape retaining material).

[0030]

According to the present invention, the lower anchor girder and the upper anchor girder are composed of the supporting plate and the shape retaining material fixed thereto, and these are connected to form the anchor frame. Not only the number of points is reduced and the structure is simplified, but also there is no need to grout cement mortar or the like, and there is an effect that workability can be significantly improved.

The footing in which the anchor frame is buried in the footing concrete has an effect of shortening the construction period and reducing the construction cost, as well as having sufficient strength to sufficiently support the steel pier.

[Brief description of the drawings]

FIG. 1 is a partially enlarged front view of an embodiment of an anchor frame for a steel pier according to the present invention.

FIG. 2 is an enlarged perspective view in which a part of a lower anchor girder is omitted.

FIG. 3 is a partially enlarged front view of another embodiment of the anchor frame for a steel pier.

FIG. 4 is a partial sectional view of an embodiment of the footing.

5 is a cross-sectional view in which a part of an anchor frame for a steel bridge pier at a position along a line AA in FIG.

FIG. 6 is a partially omitted sectional view showing another example of an arrangement state of the anchor frames for steel piers at the position of the section along line AA in FIG. 1;

FIG. 7 is a partially omitted sectional view showing still another example of the arrangement state of the anchor frames for steel piers at the position of the section along the line AA in FIG. 1;

FIG. 8 is a cross-sectional view in which a part of an arrangement state of the steel pier anchor frame at the position of the cross section along the line AA in FIG.

FIG. 9 is a front view in which a part of the steel bridge pier anchor frame is similarly omitted.

FIG. 10 is a partially omitted front view showing another example of the arrangement state of the anchor frames for steel piers.

FIG. 11 is a partial cross-sectional view of a conventional footing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 4 Support plate 2, 5 Shape retention material 3 Lower anchor girder 6 Upper anchor girder 7 Connection bolt 8 Nut 9 Steel pier 10, 10a Anchor frame for steel pier 11 Base plate 12 Bracing metal fitting 13 Footing concrete 14 Footing

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Hiroyuki Funakoshi 1-1-24- Ushikubo, Tsuzuki-ku, Yokohama-shi, Kanagawa Prefecture (72) Inventor Eiji 1-1-17-2-1, Hisamoto, Takatsu-ku, Kawasaki-shi, Kanagawa Prefecture

Claims (4)

[Claims] 1. A lower anchor girder having a shape retaining material fixed to an upper surface of a supporting plate and an upper anchor girder having a shape retaining material fixed to a lower surface of the supporting plate are connected by connecting bolts. An anchor frame for steel piers. 2. A steel bridge pier characterized in that a lower anchor girder formed by fixing a shape retaining material to an upper surface of a supporting plate and a shape retaining material above the lower anchor girder are connected by connecting bolts. Anchor frame. 3. A steel in which a lower anchor girder formed by fixing a shape holding material to an upper surface of a support plate and an upper anchor girder formed by fixing a shape holding material to a lower surface of a support plate are connected by connecting bolts. A footing using a steel pier anchor frame, wherein a plurality of pier anchor frames are embedded in a footing concrete. 4. A steel pier in which a lower anchor girder formed by fixing a shape holding material to the upper surface of a support plate and an upper anchor girder formed by fixing a shape holding material to the lower surface of a support plate are connected by connecting bolts. Anchor for steel piers, in which at least one or more anchor frames for use, a lower anchor girder formed by fixing a shape retaining material to the upper surface of the support plate, and a shape retaining material above the lower anchor girder are connected by connecting bolts. Footing using an anchor frame for a steel pier, wherein the frame is embedded in a footing concrete.