KR20150061467A - High tension anchor for connecting steel pier and concrete foundation and its asembly and steel pier construction method using the same - Google Patents

Abstract

The present invention provides a high tension anchor for fixing a steel pier, an assembly thereof, and a construction method of the steel pier using the same, which may simplify a connection structure between the steel pier and a concrete foundation and improve fixation strength after connecting the steel pier. According to an appropriate embodiment of the present invention, a high tension anchor for fixing a steel pier, which is used for connecting a steel pier or a steel composite pier and a base concrete, comprises: a high tension bolt manufactured with high tension steel to have a predetermined length, wherein a male screw is formed in an outer circumferential surface; and a plurality of nut-shaped headed studs clamped to be screwed in the high tension bolt. The nut-shaped headed studs comprises: a stud nut clamped to be screwed to the male screw of the high tension bolt; and a plurality of headed studs connected to a radial direction with a same arrangement angle around the stud nut.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high strength anchor for fixing a steel pier and an assembly thereof and a method for constructing a steel pier using the steel anchor,

The present invention relates to a high tensile strength anchor for fixing a steel pier and to a method of constructing a steel pier using the same, and more particularly, to a steel pipe pier which has a high tensile strength for fixing a steel pier bridge so as to simplify a connection structure between a steel pier and a concrete foundation, An anchor, an assembly thereof, and a method of constructing a steel pier using the same.

As the construction technology develops, the design and construction methods of the structure are variously evolving. Especially, bridges, which can be considered as representative structures in the civil engineering field, are increasingly being adapted to the trend of the times and are being constructed by various design methods. In a bridging bridge, the bridge should be designed with sufficient strength to support the upper structure, and the basic concrete supporting it should also have a reasonable design and economical construction to improve the connection performance with the upper structure.

The method of connecting the steel piers to the foundation concrete is mainly applied to the structural details through anchor connection. The anchor connection of the steel pier and foundation concrete is applied to the structure details to improve the lower stiffness by installing double base plate under the pier. In order to improve the connection performance between the base plate and the foundation concrete and to improve the workability of the anchor, a steel anchor frame is installed inside the foundation concrete.

However, the installation of such a steel frame has a disadvantage that the design method is complicated and the size of the foundation concrete becomes large. In addition, as the load of the pier upper structure increases, the number of anchors connecting the pier and the foundation gradually increases. As a result, the arrangement of the lower anchors is doubled and tripled to show a complicated structure.

At present, studies on the details of bridge piers and foundations are being carried out at home and abroad. However, most studies on the connection between bridge piers and foundations in the field of architecture are mostly conducted, and studies on large-capacity foundation anchors have not been conducted.

Korean Patent Registration No. 10-0431835 (anchor for a steel pier using a deformed bar steel) has been proposed as a background of the present invention. This is an anchor used for a bridge pier foundation of a steel pier, in which a thread portion for mounting a nut is formed at the upper and lower ends of the body portion made of deformed bar steel, and a plurality of studs are installed at regular intervals in the longitudinal direction, Provided is an anchor for a steel pier using a deformed bar steel having improved bonding performance with a base concrete.

Therefore, a plurality of studs improves the structural performance by making the integrated behavior with the base concrete improve, and since the assembled connecting frame is used, the construction can be performed by only a few operators without the need of a crane, and workability and economical efficiency can be improved.

However, the above background art has a problem that the diameter is increased to increase the tensile force by applying the deformed bar steel. Further, since the studs are fixedly mounted on the deformed bar steel, it is difficult to adjust the degree of accentuation according to the installation environment, and the arrangement of the studs between the upper and lower studs can not be adjusted.

Korean Patent Publication No. 2001-0057453 (Steel Pier Pier Anchor System Using Large Deformed Reinforcement) Korean Unexamined Patent Publication No. 2002-0050840 (Steel Pier Anchoring System Using Reinforced Steel) Korean Registered Patent No. 10-0830119 (Connection structure between foundation concrete part and bridge pier) Korean Patent No. 10-1045805 (a prefabricated pier using an internal confined hollow concrete filling unit and its construction method)

An object of the present invention is to provide a high strength anchor for fixing a steel pier bridge, an assembly thereof, and a method for constructing a steel pier bridge using the same, which simplifies a connection structure between a steel pier and a concrete foundation and improves the fixing strength after connection of the steel pier bridge .

According to a preferred embodiment of the present invention, there is provided a high tensile strength anchor for fixing a steel pier,

In an anchor used to connect a steel pier or steel composite pier to foundation concrete,

A high tension bolt made of high tensile steel and having a predetermined length and having a male thread formed on an outer circumferential surface thereof;

And a plurality of nut-type head studs fastened to the high-tension bolt by screwing;

The nut-type headed stud is characterized in that,

A stud nut fastened to the male screw of the high tension bolt by screwing;

And a plurality of head studs joined to each other in the radial direction with the same arrangement angle around the stud nuts.

The apparatus may further include at least one position adjusting nut screwed to the high tension bolt.

The high tension bolt is characterized in that one end of the high tension bolt is fixed with a tightening nut by inserting the setting plate.

Further, the present invention is further characterized in that the at least one stud connecting rod is further connected to the plurality of the nut-type head studs so that the plurality of the nut-type head studs are integrally connected and moved simultaneously.

According to a preferred embodiment of the present invention, there is provided a high tension anchor assembly for fixing a steel pier,

An upper plate and a lower plate which are vertically joined to the lower side of the steel column at regular intervals, and a main angle formed by a plurality of reinforcing ribs connected to the upper plate and the lower plate;

A high strength bolt made of high tensile steel and having a predetermined length and having a male thread formed on the outer circumferential surface thereof, a stud nut fastened to the male thread of the high tension bolt by screw engagement, and a plurality of radially joined stud nuts A high tensile strength anchor for fixing a steel pier bridge comprising a plurality of nut type head studs composed of a headed stud and a position adjusting nut screwed to a high tension bolt for adjusting an installation position of the high tension bolt;

And a setting plate inserted into a lower end of the high tension bolt and fixed by a tightening nut.

In order to minimize the area size of the setting plate, the high tension bolt is disposed in the inside and the outside of the steel pier, and the two bolts It is desirable to install.

Meanwhile, a method of constructing a steel pier using a high tension anchor for fixing a steel pier bridge according to the present invention,

Excavating for a pier foundation and laying reinforcement in the excavation portion;

Assembling the high tension anchors to the main body of the steel pier and connecting them with the position adjusting nut, then inserting the setting plate into the lower end of the high tension bolt side of the high tension anchor and fixing them with the tightening nut;

Elevating the steel pier and positioning the anchor base portion of the setting plate and the high tension anchor at the excavation portion for the pier foundation, adjusting the installation position and the horizontal posture of the high tension anchor and the setting plate with the positioning nut;

And placing and curing the foundation concrete so that the nut type head stud of the high tension anchor is embedded in the concrete at the excavation part.

According to the high tensile strength anchor for fixing a steel pier of the present invention and the method of constructing a steel pier bridge using the same, the head stud is fastened and assembled to the high tension bolt by using a nut to simplify the connecting structure of the steel pier base anchor portion, Connection performance is improved after connecting the piers.

Further, the headed stud can be positioned at a desired position of the high tension bolt through the nut, and can be disposed upside down so as to improve the connection performance.

Further, the high-tension bolt is disposed on the inner and outer portions of the steel pier, thereby reducing the size of the base plate, thereby effectively using the space.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the principles of the invention, Shall not be construed as limiting.
1 is a front view of a high tension anchor for fixing a steel pier bridge according to the present invention.
2 is a plan view and a front view of a nut type head stud applied to the present invention.
FIG. 3 and FIG. 4 are installation states of a steel pier using an anchor for fixing a steel pier bridge according to an embodiment of the present invention.
5 is a sectional view taken along the line AA in Fig.
6 is a front view showing a modified example of a high tensile strength anchor for fixing a steel pier bridge according to the present invention.
7 is a structural view of a high tension anchor assembly for fixing a steel pier bridge according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto.

The high tensile strength anchor 10 for fixing a steel pier bridge according to the present embodiment includes a plurality of nut type head studs 14 coupled to a high tension bolt 12 and a high tension bolt 12 by screwing as shown in FIG.

High-strength bolts 12 is made of nickel, chromium, molybdenum, high strength steel by the addition of alloying elements such as manganese showing the tensile strength of 50kg / mm ² or more, the yield point 30kg / mm ² or more. The high tension bolt 12 has a constant diameter and a predetermined length and has a male thread formed on the outer circumferential surface. In this embodiment, the high tension bolt 12 is formed with a male thread in a full length section, but only a certain section of the lower section and a certain section of the upper section may be formed as male threads.

As shown in FIG. 2, the nut-type headed stud 14 has a stud nut 14a which is threadedly engaged with the male thread of the high tension bolt 12 and a stud nut 14a which is joined to the threaded stud 14a in the radial direction And a plurality of head-mounted studs 14b.

The stud nut 14a has a screw hole 14a 'formed at the center thereof to be engaged with the male thread of the high tension bolt 12. In the present embodiment, the stud nut 14a has a hexagonal cross section, and four head studs 14b are welded around the stud studs 14b at intervals of 90 degrees. At this time, the two headed studs 14b are joined to the plane of the stud nut 14a, and the remaining two headed studs 14b are joined to the stud nut 14a after chamfering the corners in a plane.

The stud nut 14a may have a hexagonal cross-section as in the present embodiment, but may also be formed in a polygonal cross-section such as a square or circular. When the stud nut 14a is formed in a circular shape, the stud 14b can be punched or screwed into the stud nut 14a and welded thereto.

In the present embodiment, four nut-type head studs 14 are fastened and assembled to one high tension bolt 12, but the number of the studs 14 can be increased or decreased.

Accordingly, as shown in FIG. 1, the nut-type head stud 14 can be coupled to the high-tension bolt 12 through threaded rotation of the stud nut 14a to adjust its position. Thus, in the present embodiment, the four nut-type head studs 14 are joined in different heights. At this time, the headed stud 14b, which is connected to the four nut-type headed studs 14, can be placed at the same rotational position, but has an advantage that the headed studs 14b can be arranged upside down.

Here, one or more positioning nuts 16 screwed to the high tension bolt 12 may be further included.

3, 5 and 7, the high tensile strength anchor 10 may be assembled with the tilt angle 210 and the setting plate 18 to form one high tension anchor assembly. At this time, the pendulum 210 is connected to the upper plate 211, the lower plate 212, the upper plate 211, and the lower plate 212, which are vertically joined to the lower side of the steel column 200 at regular intervals And a plurality of reinforcing ribs 213.

Preferably, the lower plate 212 is formed with a concrete front end hole 212a passing through the center at an area smaller than the internal cross sectional area of the steel pier 200, and a high tension bolt 12 may be arranged in two rows inside and outside the steel pier 200. The setting plate 18 is inserted into the lower end of the high tension bolt 12 and fixed with the tightening nut 20. The concrete shear hole 212a allows the interior of the steel pier 200 and the foundation concrete 100 to be bound together by concrete. When the high tensile strength bolts 12 are disposed inside and outside the steel pier 200 and are installed in two rows, the area of the setting plate 18 is reduced as shown in FIG. 4, so that the foundation concrete 100 can be small- .

A method for constructing a steel pier bridge (or steel composite bridge bridge) 200 by applying the high tension anchor 10 for fixing a steel pier bridge thus constructed will be described.

First, the foundation is drilled at a certain depth in the ground for foundation construction, and reinforcing steel is placed in the excavation part.

Next, as shown in FIG. 3, a plurality of high tension anchors 10 are assembled to the main body 210 of the steel pier 200 and connected to the positioning nut 16, and then the setting plate 18 is fixed to the high tension anchor 10, Is inserted into the lower end of the high tension bolt (12) side and fixed with the tightening nut (20). In order to minimize the area size of the setting plate 18, the high tension bolts 12 are arranged in two rows inside and outside the steel pier 200, and the high tension bolts 12 are provided in the lower section of the high tension bolt 12 of the high tension anchor 10 And a plurality of nut-type head studs 14 are assembled by screw-fastening. In the present embodiment, four nut-type head studs 14 are provided at equal intervals in the lower section of one high tension bolt 12.

After the steel piercings 200 are pulled up, the anchor base portions of the setting plate 18 and the high tension anchor 10 are positioned at the excavation portion for pier foundation, and the high tension anchor 10 And the setting position and the horizontal posture of the setting plate 18 are adjusted. Here, the 'anchor base portion' refers to a portion where four nut-type head studs 14 are installed.

Next, as shown in FIG. 4, the foundation concrete 100 is placed and cured so that the nut-type head stud 14 of the high tension anchor 10 is embedded in the concrete at the excavated portion.

Therefore, the steel pier 200 is firmly fixed to the foundation concrete 100 through a plurality of steel pier-fixing high tension anchors 10. [ The resulting reaction force of the anchor is resisted by the nut type head stud 14 which can be fixed in the form of a nut without special welding. Also, by using the high tension bolt 12, the connection strength is increased as compared with a general anchor. Therefore, it is possible to reduce the number of double anchor and triple anchor at the existing large anchor base.

On the other hand, since studs are replaced with nut type head studs, there is no additional work such as welding to high tensile anchors, so that efficient construction is possible, and residual stress due to heat and deformation does not exist. Also, since the high tensile strength anchor 10 for fixing the steel pier bridge is mounted by using the setting plate 18, it is possible to replace the existing steel frame, the connection structure is simplified, and the anchor performance over the existing base portion can be secured.

In addition, the high tensile strength anchor 10 is embedded in the inside and outside of the steel bridge pier 200, so that the size of the setting plate 18 can be made small and the size of the base concrete 100 can be minimized.

Especially, since the pulling force of the anchor bolt is assumed to occur in the 45 ° direction from the end of the steel frame, the steel frame plays an important role in the pulling force of the anchor bolt. However, since it can be set regardless of the presence or absence of the steel frame, when the steel frame is replaced with the setting plate 18 simplified as in the present invention, the shear resistance surface and the shear resistance angle with respect to the pulling force of the anchor bolt are the same Effect can be achieved.

6, a plurality of nut-type head studs 14 are integrally connected to each other, and at the same time, one or more stud-connected studs 14 are connected to a plurality of nut- A rod 15 is further included to constitute the high tensile strength anchor 10 for fixing the steel pier bridge. When the stud connecting rod 15 is provided, the four nut-type head studs 14 can be fastened to the high tension bolt 12 at the same time, thereby improving the workability.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the above teachings. will be. The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

12: High tension bolt
14: Nut type head stud
14a: Stud nut
14b: Stud with head
15: Stud connection rod
16: Positioning nut
18: Setting plate
100: foundation concrete
200: Steel pier

Claims (7)

An anchor used to connect a steel pier or steel composite pier to a foundation concrete,
A high tensile strength bolt 12 made of high tensile steel and having a predetermined length and having a male thread formed on an outer circumferential surface thereof;
And a plurality of nut-type head studs (14) threadedly coupled to the high tension bolt (12);
The nut type head stud (14)
A stud nut 14a screwed to the male screw of the high tension bolt 12;
And a plurality of headed studs (14b) fixed radially around the stud nut (14a) with the same arrangement angle as the circumference of the stud nut (14a). The method according to claim 1,
Further comprising at least one positioning nut (16) screwed to the high tension bolt (12). The method according to claim 1,
Wherein one end of the high tension bolt (12) is inserted into a setting plate (18) and fixed by a tightening nut (20). The method according to claim 1,
One or more stud connection rods (15) are further connected to the plurality of nut-type head studs (14) so that a plurality of the nut-type head studs (14) are integrally connected and simultaneously moved High tensile strength anchor for fixing steel piers. An anchor assembly for installing a steel pier to a foundation concrete,
An upper plate 211 and a lower plate 212 which are vertically joined to the lower side of the steel column 200 at regular intervals and a plurality of reinforcing ribs 213 connected to the upper plate 211 and the lower plate 212 A main body 210 made of a metal;
A stud nut 14a fastened to the male thread of the high tensile strength bolt 12 by screwing and a stud nut 14a which is made of high tensile steel and has a predetermined length and a male thread formed on the outer circumferential surface thereof; A plurality of nut type head studs 14 made up of a plurality of headed studs 14b joined in the radial direction at the same placement angle and a plurality of headed studs 14 having a nut shape are assembled to the high tension bolt 12 in order to adjust the installation position of the high tension bolt 12 A high tensile strength anchor for fixing a steel pier bridge consisting of a threaded positioning nut (16);
And a setting plate (18) inserted into a lower end of the high tension bolt (12) and fixed by a tightening nut (20). 6. The method of claim 5,
The lower plate 212 is formed with a concrete front end hole 212a passing through the center at an area smaller than the internal cross sectional area of the steel pier 200 and a high tension bolt 12 ) Are arranged in two rows inside and outside the steel pier (200). Excavating for a pier foundation and laying reinforcement in the excavation portion;
A high tension anchor (10) according to any one of claims 1 to 4 is assembled to a main body angle (210) of a steel bridge pier (200) and connected to a position adjusting nut (16) Inserting the high tension anchor (10) into the lower end of the high tension bolt (12) side and fixing the fastener bolt (12) with the tightening nut (20);
The anchor base portion of the setting plate 18 and the anchor base 10 of the high tension anchor 10 are moved to the excavation portion for the pier foundation by raising the steel pier 200 and then the high tension anchor 10 and the setting plate 18 And adjusting a mounting position and a horizontal posture of the vehicle;
And a step of curing and curing the base concrete (100) so that the nut-type head stud (14) of the high tensile strength anchor (10) is embedded in the concrete at the excavation part of the high strength anchor Construction method of steel piers.

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