KR101922534B1 - Composite type steel temporary construction and construction method thereof - Google Patents

Abstract

The present invention relates to a square pipe type two-channel (2C) member to construct a soil retaining wall. A technical characteristic of the present invention is in that two flat U-shaped steels are integrated through a plurality of bonding plates to form a square pipe shape. In other words, the bonding plates arranged in a longitudinal direction at equal intervals are welded, such that the 2C member, which is a square tubular body, forms a ladder structure. Accordingly, a section modulus, which is a bending rigidity, and a web sectional area, which is a shear rigidity, are increased. In particular, a change in storing and weak axial rotational radiuses is removed to increase the rigidity by axial force, and also reduces construction costs by 30 to 50% so as to provide economic efficiency. Moreover, spaced working holes (opening grooves) of the 2C member are formed by an interval of about 18 cm, such that a worker is able to smoothly perform construction (welding and bolting in connection or bonding), and thus workability is largely improved. Moreover, the structure of a soil retaining wall structure is largely improved, construction is simplified, connectivity with respect to soil pressure stress is improved, and thus structural stability is improved.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-channel (2-channel) member for earthquake-

The present invention is characterized in that two c-shaped steel tubes are integrally formed through a plurality of joint plates so as to have a rectangular tube shape. This is because a plurality of joint plates (bonding plates) arranged at regular intervals along the longitudinal direction are welded, This is because the section modulus of flexural rigidity and the cross sectional area of web which is shear rigidity are increased. In particular, rigidity due to axial force is increased because there is no fluctuation in the radial direction of the strong axis and the weak axis, And the spacing of the work holes (opening grooves) of the 2C member are formed to be about 18 cm apart, and it is ensured that the workability is improved by allowing the worker to smoothly perform the construction work (welding or bolt work at the connection or bonding) A two-channel member for retaining the soil and a method of constructing the earth retaining structure using the 2C member.

Accordingly, the present invention is characterized in that the strength of the retaining structure is greatly improved, the construction is simplified, the productivity is improved, and the connectivity to the earth pressure stress is improved, thereby improving the structural stability.

Generally, when excavating the ground to install an underground structure in civil engineering, construction work, etc., the retaining wall is constructed to prevent the collapse of the excavated surface.

A strut is one of the supporting posts for supporting the earth retaining walls. It is a structure supporting the earth retaining walls by transferring the load acting on the wall to the opposite wall.

Even when various strands of earth retaining walls are used, a strand is provided on the wall when the strand is used as a girder, and a strand is provided on the strand to connect the same in the same manner as the opposite wall.

Therefore, it is easy to check the stress and deformation of the material, so it belongs to the method which is easy to manage safety.

And, this strut is most widely used because it is relatively easy to construct and is not subject to much ground conditions.

On the other hand, the strut is mainly made of H-shaped steel. In case of H-section, it has a strong axis and a weak axis due to its cross-sectional characteristics. The weak axis direction is disadvantageous for buckling, and a stiffener such as bracing is designed in parallel for this purpose.

Therefore, when a stiffener is installed, a dangerous work occurs in which a worker climbs up on the strut, and there is a risk of sudden destruction of the axle direction.

In addition, the steel pipe strut has a structure section favorable for buckling and twisting because there is no distinction between the strong axis and the weak axis, and the construction cost, construction period, construction property It is used in most stratumbo form from abroad because it is relatively advantageous than H-beam.

However, in order to increase the section stiffness, the steel pipe strut should have a larger diameter and a strut connection must be developed.

In more detail, as shown in Korean Patent Registration No. 10-0581610, the conventional strut connection structure includes a plurality of beams connected to each other as a structure for supporting a wall constructed to resist pressure, And a housing for tightly connecting the beam by wrapping and fixing the side surface of the connecting member which is in contact with the connecting member, wherein the connecting member is fixed to the connecting member, do.

In addition, Korean Registered Utility Model Registration No. 20-0399886, as another technique to be a background of the present invention, comprises a strut of a pair of opposing circular steel tubes and a strut connected and fixed to the inside of the strut, And a rotary jack threadedly formed on the outer circumferential surfaces of both sides and threaded in opposite directions to each other so as to be screwed to the auxiliary connection pipe, wherein the interval between the two strut bosses is adjusted as the rotary jack rotates The connection structure is presented.

This means that the length of the jack and the strut or the jack and the wrist strap can be adjusted so that the length of the jack can be adjusted while being coupled to the strut or the wrist strap so that the connection structure is simple and can be engaged in a short time, It provides easy to install bracket connection structure.

However, such background techniques are made of H-shaped steel or circular steel pipe. Therefore, in case of H-shaped steel, it is required to be installed considering the installation position along the strong axis and the weak axis, and additional installation of the reinforcing member is required. The joint portion is protruded, and there is a problem that the diameter must be increased to increase the compression stiffness.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is a technical object of the present invention to provide a cushioning device in which two c-shaped steel pieces are integrally formed through a plurality of bonding plates, Plate) are welded to each other so that the 2C member of each pipe section forms a ladder structure. This is because the cross-sectional modulus of bending rigidity and the web cross-sectional area of shear stiffness are increased, and rigidity due to axial force (Opening groove) of the 2C member is formed with a gap of about 18cm, so that the worker can perform the construction work (welding or bolting work for connection or bonding) (2-channel) member for the earth retaining construction and the earth retaining construction method using the 2C member .

Accordingly, the present invention is characterized in that the strength of the retaining structure is greatly improved, the construction is simplified, the productivity is improved, and the connectivity to the earth pressure stress is improved, thereby improving the structural stability.

The problems of the present invention are summarized as follows.

1. Technical description (part 2C of the appendix) Retaining wall  The design drawing (see existing design drawing - see Figure 15), the earth retaining structure bill and the existing design volume comparison chart)

(2C member or two-channel (snout) member), the gap between the opening grooves of the spaced apart beams is formed to be 18 cm while welding the equally spaced bonding plates along the longitudinal direction .

At this time, the 2C member has the characteristic of each pipe, and since there is a gap (18cm) between the two steel plates facing each other, welding and bolt work are smoothly performed at the time of connection or bonding, and work efficiency is improved.

Although the weight increases somewhat compared with the general member H-shaped steel, the section modulus of flexural rigidity, the web cross-sectional area of shear stiffness, and the rigidity due to the axial force increase due to the variation of the radial and axial axes, It is economical because it saves 50%.

2C member structure calculation

2C member  Cross-sectional property comparison chart ( Connecting plate  apply)

2. The 2C member Wig  When using

The weight is increased by 1.39 times as compared with that of H-shaped steel. However, the section modulus of resistance, which is the flexural stiffness, increases by 1.5 times and 4.20 times, respectively, and the shear stiffness is increased by 2.71 times.

The shear force dominates the shear force during the stress investigation, so that the wale span can be increased more than two times.

H-shaped steel band connection part should be welded, but 2C member band part can be bolted and disassembled without disconnection loss during disassembly, so that work efficiency is good. Particularly, in case of earth anchor band, hole is generated in flange when H- And the member stiffness is reduced due to the occurrence of the sectional loss at the time of the formation of the member. However, the member 2C is characterized in that the same member can be reused because there is no sectional loss.

3. When using stratum 2C member

The weight is increased by 1.39 times and the axial resistance value is increased by 1.39 times as compared with the case of using H-shaped steel. However, the stiffness of the strand is increased by 1.7 to 2.0 times since the value of the strong axis and the weak axis of the radius of gyration .

H-shaped steel is used to install a piece, a buckling beam is sent, and a strut is sent. However, when a 2C member is used, a buckling beam is not required, and a 2C member is welded to a center plate so that it can be easily welded There are features.

4. 2C member Wig  And stratumbo

The weight is increased by 1.39 times as compared with the case of using the H-shaped steel band and the stridebo, but the wrist band gap and the stride band gap can be installed widely, so that the construction cost is reduced to 30 to 50% even considering the weight increase.

Further, since the same 2C member is installed in the same direction when connecting the wrist strap and the strut braid, the safety of the joint is ensured and the workability of the connecting portion is improved.

In order to achieve the above object, the 2C member 100 of the present invention includes a plurality of c-shaped steel plates 110 having bent surfaces 112 formed on both sides thereof with respect to the support surface 111, When the openings 110 are disposed so as to be symmetrical with respect to each other, the joining surfaces 121 of the joining plates 120 are welded to each of the plurality of c-shaped sections 110 Are spaced at mutually set intervals to secure the work hole 130, and the cross-sectional shape connected from the c-shaped steel to the work hole is formed to have a rectangular shape.

The joint panel 200 is provided at the longitudinal end of the 2C member 100 to facilitate the joining with the neighboring 2C members. The joint panel 200 includes bolts fastened to the upper, lower, left, and right sides of the 2C member 100, this; .

Therefore, it is preferable that the joining plate 120 of the 2C member is attached to the inner circumferential surface of the curved surface 112 in the width direction joining surface 121. [

In addition, the 2C member 100 is joined by the joint plate 300 when the corner strut is connected, and the joint plates are formed so as to be bolted to each other on the same plane as the plane of contact with the plane.

At this time, the 2C member 100 is formed so as to prevent the loss of the member hole by allowing the earth anchor 400 to penetrate through the work hole 130 formed between the plurality of c-shaped steel members 110 without interference.

Therefore, it is preferable that the 2C member 100 be used as either a welt or a strut.

As described above, in the present invention, two c-shaped steel tubes are integrally formed through a plurality of joint plates to form an angular tube shape. This is because when a plurality of joint plates (bonding plates) arranged at regular intervals along the longitudinal direction are welded, This increases the section modulus of flexural stiffness and the web cross section of shear stiffness. In particular, there is no variation in the radial axis of the strong axis and the weak axis, which increases rigidity by axial force and reduces the construction cost by 30 to 50%. (Opening groove) of the 2C member is formed with a spacing of about 18 cm, and the workability is greatly improved because the worker is assured that the construction work (welding and bolt work at the connection or bonding) is smoothly performed .

In addition, since the 2C member is installed in the same direction when the wrist strap and the strut are connected, safety of the joint is secured, workability of the connection is improved, and work efficiency is increased.

Accordingly, the present invention has an effect that the strength of the retaining structure is greatly improved, the construction is simplified, the productivity is improved, and the connectivity to the earth pressure stress is improved, thereby improving the structural stability.

1 to 4 are views showing an example of a 2C member according to the present invention,
5 to 7 are views showing an example of a joint panel according to the present invention,
FIGS. 8 to 12 are views showing joint plates used in connection of a corner brace according to the present invention,
13 is an exemplary view showing that a 2C member according to the present invention is coupled to a center file,
Fig. 14 is an exemplary view showing that an earth anchor is penetratedly coupled to a work ball of a 2C member according to the present invention without interference;
Fig. 15 is an exemplary view showing a comparison of the trade volume between the 2C member and the conventional H-beam according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings.

1 to 14, the retaining structure of the present invention uses each tube-type 2C member 100, and the 2C member 100 is provided on both sides with respect to the supporting surface 111, A plurality of c-shaped sections 110 formed with a plurality of c-shaped sections 112 are formed.

At this time, when the openings of the plurality of c-shaped sections 110 are arranged so as to be symmetrical with respect to each other, the joint surfaces 121 of the joint plates 120 are welded at optional intervals in the longitudinal direction of the curved surface 112 A plurality of c-shaped sections 110 are spaced apart from each other at a predetermined interval to secure the work hole 130, and a cross-sectional shape connected from the c-shaped section to the work hole is formed to have a rectangular shape.

That is, the spaced apart working holes 130 (opening grooves) of the 2C member are formed to have a spacing of about 18 cm, which allows the operator to smoothly carry out the construction work (welding or bolt work in connection or bonding) do.

At this time, the 2C member (100) is provided with a joint panel (200) at the longitudinal end thereof so as to facilitate bonding with the adjacent 2C members, so that the 2C members (100) .

That is, in the case of the former H-shaped steel, the braces are used to join the two transverse cross-sections orthogonal to the center I-shaped ribs. This is because there are only two bonding surfaces, Disadvantages arise.

In other words, the 2C member of the present invention is formed of each tube type and has a feature that the coupling property is ensured across the four sides.

Therefore, it is preferable that the joining plate 120 of the 2C member is attached to the inner circumferential surface of the curved surface 112 in the width direction joining surface 121. [

That is, the bonding plates are equally spaced at intervals of 70 to 100 cm along the longitudinal direction of the c-shaped steel 110, and the upper and lower end bonding surfaces (areas corresponding to the widths of the bent surfaces) of the bonding plates And thus the structure integrity and bonding property can be largely secured.

In addition, the 2C member 100 is joined by the joint plate 300 when the corner brace is connected, and the joint plates are formed so as to be bolted to each other on the same plane as the plane contacting the plane.

At this time, the 2C member 100 is formed so as to prevent the loss of the member hole by allowing the earth anchor 400 to penetrate through the work hole 130 formed between the plurality of c-shaped steel members 110 without interference.

Accordingly, it is preferable that the 2C member 100 be used as any one or both of a wristband and a strut.

The 2C member 100 of the present invention is used as a wale band or a strut in construction of the earth retaining structure. When used as a wale band, the width direction curved surface may be directly bolted to the H- And the work ball which is opened when it is used as the wrist strap and the wrist strap is formed so that the assembling and installation are easy and the work can be done quickly.

Further, each of the 2C members 100 is characterized in that whip stress and shear cross-sectional area are greatly improved by allowing continuous lengths to be achieved by joint panels over four cross-sectional surfaces when engaged with neighboring 2C members 100 .

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

100 ... 2C member 110 ... c-shaped steel
111 ... supporting surface 112 ... bent surface
120 ... joint plate 121 ... joint surface
130 ... work ball 200 ... Joint panel
300 ... Joint plate 400 ... Earth anchor

Claims (5)

A plurality of c-shaped beams 110 having bent surfaces 112 formed on both sides of the support surface 111 are provided, and the plurality of c-shaped beams 110 are arranged such that their open directions are symmetrical with respect to each other The welding surfaces 121 of the joint plates 120 are welded at optional intervals in the longitudinal direction of the bent surface 112 to separate the plurality of c-shaped steel members 110 at a predetermined interval to secure the work hole 130 And a cross-sectional shape connecting the c-shaped steel to the work hole is formed in a rectangular shape. In the two-channel member 100 for earth retaining construction,
The joining plate 120 is formed such that the width direction joining surface 121 is attached to the inner circumferential surface of the curved surface 112 and the 2C member 100 is joined by the joint plate 300 when the corner strut joining plate is connected, The joint plate 300 is formed so as to be bolted to the surfaces of the base plates 300 in the same plane as the plane of the base plate 300. The 2C member 100 is connected to the earth anchor 300 through a work hole 130 formed between a plurality of c- The spaced apart worktable 130 is formed to have a spacing of about 18 cm so as to allow the operator to perform welding or bolt operation The 2C member 100 is provided with a joint panel 200 at the longitudinal end thereof to facilitate bonding with the neighboring 2C members. The 2C members 100 are provided on four sides of the upper, lower, right, and left sides of the 2C member 100 Bolt body Each tubular 2C for retaining construction, characterized in that is formed so as to be assembled (Two-channel) member. delete delete delete delete

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