KR101260973B1 - Apparatus for connecting strut to wale - Google Patents

Abstract

The strut end connecting device according to the present invention is connected to an end of a rectangular steel pipe and is fastened to a jack or a jack connected to the wale so that the axial force due to the earth pressure can be uniformly dispersed at the end of the square steel pipe . More particularly, the present invention relates to an end connecting part in which an end portion of the square steel pipe is inserted and connected to one side portion; And an axial force dispersing portion which is formed on the other side of the end connecting portion and is engaged with the wale band or jack and uniformly distributes the axial force through the wale band or jack to the entire square steel pipe end portion, The square steel tube is coupled to the end of the square steel pipe and is connected to the wale band or the jack connected to the wale band so that the square steel band strand can be coupled to the wale band, Further, it is possible to uniformly distribute the axial force by the earth pressure to the end portion of the square steel pipe, thereby improving compression and buckling performance of the strut.

Description

[0001] Apparatus for connecting strut to wale [0002]

The present invention relates to a stride end connecting device, which can easily and firmly connect a square strut strand to a wale band or a jack.

In general, excavation work is carried out with a certain depth to the lower side of the ground to construct the underground part of the structure.

In this excavation work, the earthquake protection method is applied to prevent the collapse of the temporary earth retaining wall due to the earth pressure generated by the excavation.

In this method, anchoring method using an anchor or strut beam method using H-shaped steel or steel pipe is applied.

In this case, the strut beam method is installed between the temporary earth retaining walls to resist the earth pressure applied to both ends, and the strut is compressed. If the strut does not have sufficient compressive stiffness, compression fracture or buckling destruction occurs .

Particularly, in the case of a single strut type strut bobbin having a short strut length, the compression stiffness should be sufficient since the compression strut mainly occurs.

In addition, in the case of a long strut type strut which has a long strut length, the compression stiffness is sufficiently large, but buckling failure occurs as the length becomes longer.

However, in order to solve the problems such as securing sufficient working space and structure interference due to the site conditions, it is necessary to increase the interval between struts and it is difficult to formulate countermeasures in such cases.

FIG. 1 is a perspective view showing an H-shaped steel as a strut, and FIG. 2 is a perspective view showing an H-shaped steel of FIG. 1 fastened to a jack connected to a wale.

Referring to FIG. 1, when the H-shaped steel 1 is used as a strut, a rectangular fastening plate 1a is formed at the end of the H-shaped steel so as to contact the wristband 2 or the jack 3, Is fastened to the wrist strap or jack by a fastening member such as a bolt or a nut.

Here, since the H-shaped section 1 having an open section with a vertical cross section is open, since there is a weak axis, there is not a sufficient compressive stiffness as a brace for compression due to earth pressure, have.

Further, the simple fastening through the illustrated rectangular fastening plate 1a shown in FIG. 1 is a structure in which the fastening portion is not capable of uniformly dispersing the axial force due to the earth pressure on the end portion of the H- Which is vulnerable to eccentricity and deformed at the corners.

As a result, a rectangular steel pipe (10 in Fig. 3), which is a rectangular steel pipe without a weak axis having a closed end face as an improved sprocket, can be utilized. Such a square steel pipe 10 has a sufficient compression rigidity due to no weak axis, No separate reinforcement members are required.

However, the rectangular steel pipe 10 is structurally excellent in performance, but has a closed end face with a closed vertical section, so that it can be fixed to the wristband 2 or the jack 3 by a fastening member such as a bolt and a nut Therefore, the H-shaped steel bracket method having an open cross-section which is relatively easy to connect is used.

It is an object of the present invention to provide a strut end joint connecting device which can easily and rigidly connect a rectangular steel strut to a wale or jack.

In order to achieve the above object, a brace end connection device according to a preferred embodiment of the present invention includes a brace end joint connected to an end of a rectangular steel pipe and connected to a wrist strap or a jack connected to the wrist strap, Is uniformly dispersed in the end portion of the square steel pipe.

More particularly, the present invention relates to an end connecting part in which an end portion of the square steel pipe is inserted and connected to one side portion; And an axial force dispersing portion formed on the other side of the end connecting portion and fastened to the wale band or the jack and uniformly dispersing the axial force through the wale band or jack on the entire square steel pipe end portion.

At this time, the end connection portion is open at both sides and has an end connection pipe to which the end portion of the square steel pipe is inserted and fitted to one side portion; And a steel pipe supporting plate for supporting the rectangular steel pipe which is drawn by blocking the other side of the end connecting pipe.

The axial force dispersing unit may include a corner reinforcement member extending obliquely from the four corners of the steel pipe support plate toward the respective center sides; And a fastening plate formed at an end of the four corner reinforcement members and fastened to the wale band or the jack.

It is preferable that the axial force distributor further includes a cross cruciform disposed between the steel pipe support plate and the fastening plate and extending from the center of the fastening plate to between the four corner reinforcement members.

In addition, it is preferable that the cross-shaped cruciform column is vertically positioned with respect to the surfaces of the steel pipe support plate and the fastening plate, and a space opened between the steel pipe support plate and the fastening plate is formed.

A first fastening hole is formed in the square steel pipe and a second fastening hole is formed in the end connecting pipe so as to correspond to the first fastening hole. The present invention is characterized in that the bolt is fastened through the first fastening hole and the second fastening hole, And a fastening reinforcement member attached to the second fastening hole so as to reinforce the fastening force of the first fastening hole.

Specifically, the tightening reinforcing member includes: a fitting portion of a cylindrical member which is forcedly press-fitted into the first fastening hole of the square steel pipe; And a locking part formed at an end of the fitting part such that a threaded hole penetrating from the fitting part is formed and the fitting part is engaged when the fitting part is inserted into the first fastening hole.

Here, it is preferable that the fitting portion has a spline projection perpendicular to the outer circumferential surface.

In addition, it is preferable that the thickness of the fitting portion is equal to the thickness of the square steel pipe.

The strut end connecting device according to the present invention is characterized in that when a rectangular steel pipe is used as a strut bracket so as to have sufficient compression rigidity for compressing earth pressure at the time of construction of a temporary earth retaining stitch, So that the square steel tube strut can be connected to the wale band. Specifically, since the fastening reinforcement member is forcedly press-fitted into the first fastening hole of the square steel pipe, the end of the square steel pipe can be firmly and easily coupled to the end connecting pipe even by simply tightening the bolt with external fastening. The square steel pipe can be stably connected to the wale.

Further, the present invention has the effect of uniformly dispersing the axial force by the earth pressure on the end portion of the square steel pipe, thereby improving compression and buckling performance of the strut.

1 is a perspective view showing an H-shaped steel as a strut.
2 is a perspective view showing that the H-shaped steel of FIG. 1 is fastened to a jack connected to a wristband.
3 is a perspective view showing a rectangular steel pipe as a strut.
FIG. 4 is a perspective view of the end of the square steel pipe shown in FIG. 3 with the strut end connecting device according to the preferred embodiment of the present invention installed and fastened to the wrist strap or jack.
FIG. 5 is a perspective view of the strut end connection device of FIG. 4;
Fig. 6 is an exploded perspective view showing the strut end connecting device of Fig. 5;
FIG. 7 is a perspective view showing a tightening reinforcing member in the strut end connecting unit of FIG. 5;

The present invention is characterized in that it is fastened to an end of a square steel pipe and is fastened to a wale or a jack connected to the wale, and is configured to uniformly disperse axial force due to earth pressure on the end of the square steel pipe.

FIG. 3 is a perspective view showing a square steel pipe as a strut, and FIG. 4 is a view showing a strut end connecting device according to a preferred embodiment of the present invention installed at an end of a square steel pipe of FIG.

FIG. 5 is a perspective view of the strut end connecting unit of FIG. 4, and FIG. 6 is an exploded perspective view of the strut end connecting unit of FIG.

Referring to FIG. 1, in the stratification method, the strut is installed between the temporary earth retaining walls to resist the earth pressure. For example, when the H-shaped steel 1 is used as a strut, , There is a limit in that compression fracture or buckling failure occurs.

In order to overcome the above-mentioned limitations, the square steel pipe 10 can be utilized as a strut so as to have a sufficient compression stiffness against compression of the earth pressure. This is because the rectangular steel pipe 10 has a cross section in which the vertical cross section with respect to the longitudinal direction is closed as a rectangular shape, so that the steel pipe does not have a distinction between a strong axis and a weak axis, which is advantageous to buckling and twisting.

The strut end connecting device 100 of the present invention is characterized in that when the square steel pipe 10 is used as a strut bracket, the square steel pipe 10 is fastened to the wristband 2 or the jack 3 mounted on the wrist strap 2 .

Specifically, the present invention includes an end connecting portion 20 provided with an end portion of a square steel pipe 10 and an axial force dispersing portion 30 formed at the other side of the end connecting portion 20.

The end connecting portion 20 is connected to one side of the square steel pipe 10 by inserting the end thereof.

The end connection unit 20 includes an end connection pipe 22 having both sides opened and a steel pipe support plate 24 closing the other side of the end connection pipe 22. [

The ends of the square steel pipe 10 are inserted into the end connecting pipe 22 at one side of the opened both side portions.

The opening of one side of the end connecting pipe 22 preferably has an internal structure corresponding to the external structure of the end portion of the inserted rectangular steel pipe 10 so that the end of the square steel pipe 10 is inserted so that no shaking occurs .

That is, the end connecting pipe 22 has an internal structure such that there is almost no gap between the outer surface of the end portion of the drawn square steel pipe 10 and the inner surface of the end connecting pipe 22, and the end portion of the square steel pipe 10 Of course, be easily inserted into one side of the end connector tube 22.

The steel pipe supporting plate 24 has a structure for closing the other side of the end connecting pipe 22 so as to support the drawn square steel pipe 10.

The steel pipe supporting plate 24 supports the end face of the rectangular steel pipe 10 so that the inserted rectangular steel pipe 10 is fixedly positioned and the axial force is applied to the square steel pipe 10 even if the end of the rectangular steel pipe 10 is deformed. So that they can be uniformly transmitted to the ends.

At this time, it is preferable that the steel pipe supporting plate 24 is welded to the other side of the end connecting pipe 22.

The axial force dispersing portion 30 of the present invention is formed on the other side portion of the end connecting portion 20 and is fastened to the wristband 2 or the jack 3 so as to be connected to the wrist strap 2 or the jack 3, Is uniformly dispersed throughout the entirety of the square steel pipe 10.

The axial force dispersing unit 30 includes a corner reinforcement member 32 mounted at four corners of the steel pipe support plate 24 and a fastening plate 34 formed at an end of the corner reinforcement member 32.

Here, the corner reinforcement members 32 extend obliquely from the four corners of the steel pipe support plate 24 toward the respective center sides.

This corner reinforcement member 32 distributes the axial force to a wide area of the end portion of the square steel pipe 10 together with the cruciform pillar 36 to be described later.

One side of the connecting plate 34 is provided in contact with the end of the four corner reinforcement members 32. The side plate 2 or the jack 3 is in contact with the other side of the connecting plate 34 and is fastened by a fastening member such as a bolt or a nut. Respectively.

At this time, it is preferable that the above-described corner reinforcement member 32 is welded to the four corners of the steel pipe support plate 24, and the fastening plate 34 is also welded to the corner reinforcement member 32.

In addition, the axial force dispersion unit 30 may further include a cross column 36 formed between the steel pipe support plate 24 and the fastening plate 34.

The cross column 36 is disposed between the steel pipe support plate 24 and the fastening plate 34 and has a cross shape extending from the center to the four corner reinforcement members 32.

The crisscross pillar 36 disperses the axial force received from the clamping plate 34 and transmits the axial force uniformly to the steel pipe support plate 24 together with the corner reinforcement member 32.

As described above, since the steel pipe supporting plate 24 of the end connecting portion 20 and the corner reinforcing member 32 and the cross column 36 of the axial force dispersing portion 30 are configured as described above, the compression and buckling performance of the strut is improved .

Meanwhile, in the present invention, a tightening reinforcing member 90 is used to firmly fasten the square steel pipe 10 fitted to the end connecting pipe 22, which will be described with reference to FIG.

FIG. 7 is a perspective view showing a tightening reinforcing member in the strut end connecting unit of FIG. 5;

Referring to FIG. 1, at least one first fastening hole 1a is formed on each side of the rectangular steel pipe 10, and a second fastening hole 1a corresponding to the first fastening hole 1a is formed in the end connecting pipe 22. [ (22a) is formed.

At this time, the tightening reinforcing member 90 is attached to the second fastening hole 22a to reinforce the fastening force of the bolt 98 screwed from the outside to the inside through the first fastening hole 1a.

Specifically, the tightening reinforcing member 90 includes a fitting portion 92 fitted into the first fastening hole 1a of the rectangular steel pipe 10, a fastening portion 94 formed at the end of the fitting portion 92, Respectively.

The fitting portion 92 is forcedly press-fitted into the first fastening hole 1a of the rectangular steel pipe 10 and fixed. That is, the fitting portion 92 is inserted and fixed in the first fastening hole 1a by being forcedly inserted into the first fastening hole 1a almost by the same or slightly larger than the first fastening hole 1a. Preferably, the thickness of the fitting portion 92 is equal to the thickness of the rectangular steel pipe 10, so that the fitting portion 92 is caught by the first fastening hole 1a.

An excessive shearing stress may be generated in a portion where the bolt 98 is fastened to the bolt 98 and the bolt 98 is screwed into the bolt 98 when the excessive shear stress is transmitted to the bolt 98 or the bolt fastening hole, Or breakage of the bolt fastening hole. In this case, the fastening cross-section is greatly reduced as compared with the joining method such as welding, and there is a limit in that the fastening portion becomes weak.

In order to overcome these limitations, by increasing the fastening cross-section by the fastening reinforcement member 90 of the present invention, which is forcedly press-fitted into the first fastening hole 1a and firmly inserted and fixed, even if concentrated stress acts on the fastening portion, Damage such as breakage or cutting can be prevented, and the fastening force can be improved.

The fitting portion 92 is formed with a spline projection 92a perpendicular to the outer circumferential surface. By this vertical spline projection 92a, the splice protrusion 92a is press-fitted while the fitting portion 92 is forcedly press-fitted into the first fastening hole 1a, so that a further increased fastening force can be obtained.

That is, the sharp edges of the spline protrusion 92a are compressed by the forced indentation so that the pointed shape disappears, and as a result of being pressed onto the inner surface of the first fastening hole 1a, The fixing force is further increased.

The engaging portion 94 is formed at the end of the fitting portion 92 so that the fitting portion 92 is engaged when the fitting portion 92 is inserted into the first fastening hole 1a. That is, the outer diameter of the engaging portion 94 is formed to be larger than the outer diameter of the fitting portion 92.

At this time, the engaging portion 94 is formed with a screw hole 96 penetrating from the fitting portion 92. The bolt 98 is screwed into the screw hole 96 passing through the fitting portion 92 and the engaging portion 94 96).

Since the other side portion of the end connecting portion is blocked by the axial force dispersing portion configured to be connected to the wale band or the jack in the process of connecting the square steel pipe to the wale band or the jack, the square steel pipe, which is inserted into the opened one side portion of the end connecting portion, In order to engage with the connector, it is possible only by inserting bolts from the outside and tightening them.

At this time, since the tightening reinforcing member 90 is forcedly press-fitted into the first fastening hole 10a of the rectangular steel pipe as described above, the end portion of the square steel pipe is firmly fixed to the end connecting pipe even by simply tightening the bolt So that the square steel pipe can be firmly connected to the wale.

As a result, when the square steel pipe 10 is used as a strut bracket so as to have a sufficient compressive rigidity against compression of earth pressure at the time of construction of the temporary earth retaining wall, The square steel pipe 10 can be connected to the wristband 2 by being fastened to the jack 3 connected to the wristband 2. Specifically, the fastening reinforcement member 90 is forcedly press-fitted into the first fastening hole 10a of the rectangular steel pipe so that the end portion of the square steel pipe 10 is connected to the end connecting pipe 22 So that the square steel pipe 10 can be firmly connected to the wristband 2.

Further, the present invention has the effect of uniformly dispersing the axial force by the earth pressure on the end portion of the square steel pipe 10, thereby improving compression and buckling performance of the strut.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood that various changes and modifications may be made without departing from the scope of the appended claims.

1: H-beam 1a: Square fastening plate
2: Wristband 3: Jack
4: Nut 10: Square steel pipe
20: end connection 22: end connection
22a: second fastening hole 24: steel pipe supporting plate
30: Axial force dispersion unit 32: Corner reinforcing member
34: fastening plate 36:
90: fastening reinforcing member 92:
92a: Spline projection 94:
96: screw hole 98: bolt
100: Strap end connector

Claims (9)

And is configured to be engaged with an end portion of a square steel pipe and to be connected to a wale band or a jack connected to the wale band and to uniformly disperse an axial force due to earth pressure at the time of constructing the temporary earth retaining portion,
An end connecting portion to which the end portion of the square steel pipe is inserted and connected to one side portion; And an axial force dispersing portion that is formed on the other side of the end connecting portion and is engaged with the wale band or jack and uniformly disperses the axial force through the wale band or jack on the entire end of the rectangular steel pipe,
Wherein the end connecting portion is open at both sides and has an end connecting pipe to which an end of the square steel pipe is inserted and fitted to one side portion; And a steel pipe support plate for supporting the rectangular steel pipe which is drawn by blocking the other side portion of the end connection pipe,
Wherein the axial force dispersing portion comprises a corner reinforcing member extending obliquely from the four corners of the steel pipe supporting plate to the respective central axes; A fastening plate at the ends of the four corner reinforcement members and fastened to the wale band or jack; And a cruciform pillar disposed between the steel pipe supporting plate and the clamping plate and extending from the center of the clamping plate to between the four corner strengthening members,
The cross-
Wherein a space is provided between the steel pipe support plate and the fastening plate so as to be perpendicular to the surfaces of the steel pipe support plate and the fastening plate.
delete delete delete delete The method according to claim 1,
A first fastening hole is formed in the square steel pipe and a second fastening hole corresponding to the first fastening hole is formed in the end connecting pipe,
A coupling strengthening member attached to the second coupling hole to reinforce a fastening force of the bolt threaded through the first coupling hole and the second coupling hole;
Further comprising a second end connected to the first end of the strut end connection.
The method according to claim 6,
Wherein the tightening reinforcing member
A fitting portion of a cylindrical tube which is forcedly press-fitted into the first fastening hole of the square steel pipe; And
An engaging portion formed at an end of the fitting portion so that a threaded hole penetrating from the fitting portion is formed and the fitting portion is engaged when the fitting portion is inserted into the first fastening hole;
And an end portion of the pivot bracket.
8. The method of claim 7,
Wherein the fitting portion is formed with a spline projection perpendicular to an outer circumferential surface thereof.
9. The method according to claim 7 or 8,
And the thickness of the fitting portion is equal to the thickness of the square steel pipe.

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