KR20230040250A - Multi-web Reinforcing Beam, Pile using such Reinforcing Beam, Wall Structure using such Pile, and Constructing Method of such Wall Structure - Google Patents

Abstract

The present invention relates to a multi-web reinforcement beam. Each of the two main body beams is made of a C-beam. The C-beam is arranged in the form of webs facing each other so that flanges extend in opposite directions. The multi-web reinforcement beam has a box-shaped longitudinal cross-section with a plurality of webs, so structural rigidity such as transverse bending rigidity, shear rigidity, compressive rigidity, etc. is greatly strengthened, thereby having not only resistance to lateral buckling but also great resistance to bending, shear, compression, etc. In addition, the multi-web reinforcement beam has a structure that can be easily integrated and continuous with a commercially available standard H-beam. The present invention relates to a composite steel pile made by continuously integrating the multi-web reinforcement beam and a standard H-beam, an earth retaining structure constructed using the same, and a construction method for constructing the earth retaining structure.

Description

Multi-web reinforcing beam having an easy joining connection structure with a standard H-beam, composite thumb pile using the same, earth retaining structure constructed using the same, and its construction method {Multi-web Reinforcing Beam, Pile using such Reinforcing Beam, Wall Structure using such Pile, and Constructing Method of such Wall Structure}

The present invention is a multi-web reinforcing beam that can be easily combined with a standard H-beam and continuous while having a configuration with greatly reinforced structural rigidity, a composite thumb pile using the same, and a composite thumb pile using the It is about a retaining structure to be built and a method of constructing such a retaining structure.

Specifically, the present invention has a box-shaped longitudinal cross section with a plurality of webs (Multi-web), so that structural stiffness such as transverse bending stiffness, shear stiffness, and compression stiffness is greatly reinforced, thereby preventing lateral buckling. It relates to a multi-web reinforcing beam having a structure that can be easily combined with a commercially available standard H-shaped steel beam and continuous, while having great resistance to bending, shear, compression, etc. as well as resistance to In addition, the present invention relates to a composite thumb pile made by integrating the multi-web reinforcing beam and the standard H-shaped steel beam, a retaining structure constructed using the same, and a construction method for constructing such a retaining structure.

It has two upper and lower flanges and one web, so the cross-sectional shape in the longitudinal direction has an English letter H shape and the longitudinally extended steel beam is not only the thumb pile of the retaining structure using the earth plate, but also the CIP method ( It is used in various civil engineering and building structures, including retaining walls (retaining structures) using cast in place prepacked piles, retaining walls using the SCW (Soil Cement Wall) method, and retaining structures such as slurry walls. In general, such a beam having the shape of the English letter H is manufactured in a factory in a predetermined cross-sectional size and shape according to a predetermined standard, and is marketed. In this specification, a steel beam having a cross-sectional shape of the letter H in the longitudinal direction and manufactured in a factory in a predetermined cross-sectional size and shape according to a predetermined standard and sold on the market is referred to as a "standard H-beam". And in the present specification, in the case of a steel beam having two upper and lower flanges and one web, but having a longitudinal cross-sectional shape consisting of a Korean letter U, it is described as a "c-shaped beam". In addition, the direction in which these standard H-beam beams and C-beam beams extend is described as "longitudinal direction", and among the directions orthogonal to this standard, the web width direction is described as "first transverse direction", and the longitudinal direction Another direction orthogonal to and horizontally, that is, the width direction of the flange in which the flange extends (the width direction in the case of retaining structures) is referred to as a "second transverse direction".

When using a standard H-beam, it is often necessary to reinforce the cross-sectional stiffness of the beam only for a specific section in the longitudinal direction. For example, when a standard H-shaped steel beam is used as a thumb pile for an earth retaining structure, the magnitude of the back earth pressure acting on the thumb pile in the first transverse direction toward the earth retaining pile is not constant in the longitudinal direction depending on the depth of the ground. Although the load acting on the thumb pile in the longitudinal direction is different depending on the depth of the ground, when a standard H-shaped steel beam having a constant longitudinal cross-sectional shape and size is used as a thumb pile, the area where the backside earth pressure acts greatly In the first transverse direction, a phenomenon that impairs structural stability, such as bending buckling, may occur, and conversely, in the area where the back earth pressure is small, there is a problem in that expensive materials are wasted due to excessive design.

In order to solve this problem, conventionally, a method of arranging a beam having a longitudinal cross-sectional size increased only in an area requiring high structural rigidity has been proposed. That is, in an area where high structural rigidity is required, a method of arranging a reinforcing beam having an increased cross-sectional size and continuously coupling steel beams having an H-shaped cross section to one or both ends of the reinforcing beam is proposed. An example thereof is disclosed in Republic of Korea Patent Publication No. 10-2011-0022956.

However, in the case of arranging a reinforcing beam with an increased longitudinal section size only in an area where high structural rigidity is required, as in the prior art, it is not easy to combine the standard H-shaped steel beam and the reinforcing beam in an area where rigidity reinforcement is not required. There is a limit that no Commercially available standard H-beams are factory-produced and marketed with the same cross-sectional size and thickness in accordance with predetermined standards. Therefore, when integrating standard H-beams having the same cross-sectional size and shape with each other in the longitudinal direction, overlap the joint plates so that the joint plates are in close contact with the webs and flanges of both standard H-beams at the same time, and then weld or bolt quickly. And you can easily connect. However, when a reinforcing beam having a cross-sectional size or shape different from the standard H-beam is serialized, due to the difference in cross-sectional size and cross-sectional shape, the simple connection work using the overlapping arrangement of the joint plates mentioned above cannot be used. , there is no choice but to use a separate unique connection device specially manufactured to fit the cross-sectional shape and size difference, which requires cumbersome additional work and requires more time and cost due to the separate production of a special connection device. .

Republic of Korea Patent Publication No. 10-2011-0022956 (published on March 8, 2011).

The present invention was developed to overcome the limitations of the prior art as described above, and in using standard H-shaped steel beams for various purposes and uses, such as thumb piles of earth retaining structures, in areas requiring structurally high stiffness and performance, Accordingly, reinforcing beams capable of exhibiting enhanced structural rigidity and performance are arranged so that standard H-beams are integrally coupled to both ends or one end of the reinforcing beam to be continuous, but standard H-beams having the same cross-sectional size and shape As in the case of integrating the reinforcing beam and the standard H-shaped steel beam, using a general "simple beam coupling method" such as welding or bolting by attaching the joint plate to the web and flange of the reinforcing beam and standard H-shaped steel beam at the same time, Its purpose is to provide a technology that makes it possible to integrate.

In order to achieve the above object, in the present invention, a main beam made of a standard H-shaped steel beam and a multi-web reinforcing beam integrally coupled at both ends or one end in the longitudinal direction, consisting of two body beams extending in the longitudinal direction, and a body beam a main body formed by arranging the webs side by side at intervals so as to face each other; For connection with the main beam, it is made of a standard H-shaped steel beam having the same cross-sectional size and shape as the main beam, and includes an end connector integrally coupled to one or both ends in the longitudinal direction of the main body; The flange of the end connecting body is composed of a narrow flange portion with a reduced flange width at the end side coupled to the body, and a normal flange portion with an unreduced flange width at the end side coupled with the main beam; Between the two body beams at the end of the body, there is a gap of the same width as the narrow flange portion to form an insertion space; The narrow flange portion is inserted into the insertion space, and the flange thickness portion of the end connector is in close contact with the body beam, and the close portion is joined to form an integrated configuration of the end connector and the body; By having a plurality of webs, it has reinforced cross-sectional rigidity, and at the same time, structural rigidity is increased, and by coupling between standard H-shaped steel beams having the same cross-sectional size and shape, it can be integrally continued with the main beam at the longitudinal end A multi-web reinforcing beam is provided, characterized in that.

In addition, in the present invention, the multi-web reinforcing beam and the main beam are integrally combined to provide a continuous composite thumb pile, and furthermore, a retaining structure built using these composite thumb piles and a construction method thereof are provided.

The multi-web reinforcing beam according to the present invention is integrally combined with a main beam made of standard H-shaped steel beams and is continuous. The method can be applied as is. Therefore, according to the present invention, it is possible to quickly and easily combine the multi-web reinforcing beam and the standard H-shaped steel beam integrally and continuously in the field, thereby maximizing the efficiency of field work, shortening the period and greatly reducing construction costs. The effect of what can be done is exerted.

In particular, in installing thumb piles for earth retaining structures, the multi-web reinforcing beam of the present invention is installed only in the section where the back earth pressure is high, and the standard H-shaped steel beam is used in the section where the back earth pressure is low. It is possible to make the shape of a "composite thumb pile", and when such a composite thumb pile is used in a retaining structure, it is possible to increase the installation interval or reduce the number of installations of the composite thumb pile in the second transverse direction of the retaining structure. As a result, it is possible to increase construction efficiency, reduce construction materials, reduce construction cost and construction period, and thus exhibit the advantage of being able to perform more economical construction.

1 is a schematic assembled perspective view of a multi-web reinforcing beam according to a first embodiment of the present invention.
Figure 2 is a schematic exploded perspective view showing the assembly structure of the multi-web reinforcing beam shown in Figure 1;
FIG. 3 is a schematic front view of the multi-web reinforcing beam of FIG. 2 in a first transverse direction.
Figure 4 is a schematic exploded perspective view showing the installation of a spacing adjustment member between two c-shaped beams in the first embodiment shown in Figures 1 to 3.
Figure 5 (a) is a schematic perspective view showing a state in which the installation of the distance adjusting member is completed following the state of Figure 4 assembly.
Figure 5 (b) is a schematic plan view of the state shown in Figure 5 (a).
6 (a) to (c) are schematic longitudinal plan views and cross-sectional views showing the longitudinal cross-sectional configuration of the multi-web reinforcing beam according to the first embodiment of the present invention, respectively.
7 is a schematic exploded perspective view showing a configuration in which a main beam is integrally coupled to a longitudinal end of a multi-web reinforcing beam according to the first embodiment of the present invention and serialized.
8 is a schematic assembling perspective view showing a configuration in which a multi-web reinforcing beam and a main beam are integrally continuous by the sequencing operation shown in FIG. 7 .
9 is a schematic assembled perspective view of a multi-web reinforcing beam according to a second embodiment of the present invention.
Figure 10 is a schematic exploded perspective view showing the assembly structure of the multi-web reinforcing beam shown in Figure 9;
11 (a) to (c) are schematic longitudinal plan views and cross-sectional views showing the longitudinal cross-sectional configuration of a multi-web reinforcing beam according to a second embodiment of the present invention, respectively.
Figure 12 is a schematic exploded perspective view showing the installation of a spacing adjustment member between two c-beams in the second embodiment shown in Figures 9 to 11.
Figure 13 (a) is a schematic perspective view showing a state in which the installation of the spacing adjustment member is completed following the state of Figure 12.
Figure 13 (b) is a schematic plan view of the state shown in Figure 13 (a).
14 is a schematic assembled perspective view of a multi-web reinforcing beam according to a third embodiment of the present invention.
Figure 15 is a schematic exploded perspective view showing the assembly structure of the multi-web reinforcing beam shown in Figure 14;
16 (a) to (c) are schematic longitudinal plan views and cross-sectional views showing the longitudinal cross-sectional configuration of a multi-web reinforcing beam according to a third embodiment of the present invention, respectively.
17 is a schematic plan cross-sectional view showing only the part where the soil plate is inserted between the composite thumb piles in one example of the earth retaining structure according to the present invention.
18 is a schematic plan cross-sectional view showing a portion in which shotcrete walls are formed on both sides of the second transverse direction of the composite thumb pile as another example of the earth retaining structure according to the present invention.
19 is a schematic cross-sectional plan view corresponding to FIG. 17 of another embodiment of a retaining structure according to the present invention.
20 is a schematic plan cross-sectional view corresponding to FIG. 18 of another example of a retaining structure according to the present invention.
21 and 22 are schematic cross-sectional views showing that the composite thumb pile of the present invention is inserted and arranged in the underground hole, respectively.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The present invention has been described with reference to the embodiments shown in the drawings, but this is described as one embodiment, and thereby the technical idea of the present invention and its core configuration and operation are not limited.

First, the multi-web reinforcing beam 100 according to the present invention will be described. 1 is a schematic perspective view of the assembly of the multi-web reinforcing beam 100 according to the first embodiment of the present invention, and FIG. 2 is a schematic diagram showing the assembly structure of the multi-web reinforcing beam 100 shown in FIG. An exploded perspective view of phosphorus is shown. FIG. 3 shows a schematic front view of the multi-web reinforcing beam 100 of FIG. 1 in a first transverse direction.

As illustrated in the drawing, the multi-web reinforcing beam 100 of the present invention is composed of a main body 1 composed of two main body beams 11 and 12 extending in the longitudinal direction and a standard H-beam beam, and is made of a predetermined longitudinal direction. It has a length and is configured to include an end connector 2 integrally coupled to the body 1 at one or both ends in the longitudinal direction of the body 1. 1 to 3 show that the end connection body 2 is coupled to only one end of the main body 1 in the longitudinal direction, but the main body 2 will be described later at both ends in the longitudinal direction of the multi-web reinforcing beam 100 according to the present invention. When the beams 200 are integrally coupled and continuous, end connectors 2 having the same configuration are integrally coupled to both ends of the main body 1 in the longitudinal direction. That is, in the present invention, the end connecting body 2 may be provided only at one end of the longitudinal direction of the main body 1 or integrally provided at both ends of the longitudinal direction of the main body 1 as necessary.

The main body 1 has a configuration in which two main body beams 11 and 12 are arranged side by side at intervals in the second transverse direction, but the webs 13 are arranged to face each other. In the case of the first embodiment shown in FIGS. 1 to 3, each of the two body beams 11 and 12 is composed of a web 13 and a flange 14, and has a cross-sectional shape in the longitudinal direction of the Korean letter U. In particular, in the first embodiment of FIGS. 1 to 3, the two c-shaped beams are arranged in such a way that the flanges 14 extend in opposite directions to form the main body 1. That is, in the case of the first embodiment, the main body 1 is formed by two c-shaped steel beams corresponding to the body beams 11 and 12, and the web 13 so that the flanges 14 extend in opposite directions to each other By being disposed facing each other, the main body 1 is formed.

In forming the main body 1 by arranging the two main body beams 11 and 12 side by side, the second transverse distance between the main body beams 11 and 12 is adjusted according to a predetermined length to be uniformly installed. Member 8 can also be used. 4 is a schematic exploded perspective view showing the installation of the spacing adjustment member 8 between the two c-beam beams in the first embodiment shown in FIGS. 1 to 3 is shown. 5 (a) shows a schematic assembled perspective view showing a state in which the installation of the spacing adjustment member 8 is completed following the state of FIG. 4, and in FIG. 5 (b), in FIG. 5 (a) A schematic plan view of the state shown is shown.

As illustrated in FIGS. 4 and 5 (a) and (b), the spacing adjusting member 8 is composed of a rod member extending in the second transverse direction, and both ends thereof are threaded. A through hole 80 through which the end of the spacing adjusting member 8 passes is formed in each of the two c-shaped steel beams at a position where the spacing adjusting member 8 is fitted. Therefore, while the spacing adjusting member 8 is positioned in the second direction spacing between the two c-shaped beams, the end of the spacing adjusting member 8 passes through the through hole 80 of the two c-shaped beams, the through hole ( 80), front and rear fixing screws 81 are located, respectively, and are screwed to the end of the spacing adjustment member 8. In this state, by adjusting the position of the fixing screw 81, there is an advantage in that it is possible to precisely adjust and install the space between the two c-shaped beams in the second direction to a desired degree so that the designed size is achieved. In addition, the advantage of being able to further strengthen the rigidity against buckling of the body beams 11 and 12 by installing the spacing adjustment member 8 is also exhibited. These spacing adjustment members 8 can be selectively used as needed, and may be provided with a plurality of them at intervals in the longitudinal direction in which the two c-shaped beams extend long. The spacing adjusting member 8 may be provided in the same manner in another embodiment of the present invention to be described later.

Both ends in the longitudinal direction of the main body 1 or either side of both ends are provided with end connectors 2 integrally coupled. The end connector 2 consists of an H-beam with two flanges and one web 23. The longitudinal cross-sectional size and shape of the H-shaped steel beam constituting the end connector 2 are bonded to both ends or one end of the multi-web reinforcing beam 100 of the present invention and integrally connected to the main beam 200, as will be described later. ) is the same as the size and shape of the longitudinal section. That is, the end connector 2 is manufactured to have the same cross-sectional shape and size as the main beam 200 to be connected integrally, that is, has the same cross-sectional shape and size as the standard H-shaped steel beam constituting the main beam 200. It is made of standard H-beams.

However, in the present invention, each of the two flanges of the standard H-shaped steel beam constituting the end connector 2 has a reduced width (width in the second transverse direction) at a portion coupled to the main body 1 in the longitudinal direction. Specifically, the end connecting body 2 extends to a predetermined length in the longitudinal direction, but has a form in which the width of the flange is reduced in the longitudinal predetermined length section on the end side coupled to the main body 1, but the main beam 200 ) and the end side that is coupled has a form in which the width of the flange is not reduced. For convenience, the flange portion of the end connector 2 whose width is reduced is named "narrow flange portion 24a" and the flange portion whose width is not reduced is separately named "normal flange portion 24b". As such, since the narrow flange portion 24a exists in the flange of the end connector 2, there is a L-shaped step 25 between the normal flange portion 24b and the narrow flange portion 24a. . In the end connector 2, the second transverse width of the narrow flange portion 24a is equal to the spacing between the two body beams 11 and 12 constituting the body 1.

In the following, it will be described in more detail that the multi-web reinforcing beam 100 of the present invention is made by combining the main body 1 and the end connector 2 having such a configuration. The composite thumb pile using the multi-web reinforcing beam 100 of the present invention is erected and used so that the longitudinal direction is vertical, but when the multi-web reinforcing beam 100 is pre-manufactured at the factory, the longitudinal direction is laid so that the horizontal direction It is preferable to make it in the form.

According to one example of the method of manufacturing the multi-web reinforcing beam 100 according to the present invention, first, two body beams 11 and 12 are arranged side by side in a horizontal state. At this time, the two body beams 11 and 12 are arranged side by side so that the webs 13 face each other at intervals, and the ends of the body beams 11 and 12 in the direction in which the end connectors 2 are coupled. In between the two body beams 11 and 12, there is an insertion space S into which the narrow flange portion 24a of the end connector 2 is inserted.

In the case of the first embodiment illustrated in FIGS. 1 to 3, as described above, each of the two body beams 11 and 12 is made of a "c-shaped beam" and the flanges 14 of each c-shaped beam are directed in opposite directions to each other It is arranged in an elongated form. For this purpose, when installing the two c-shaped beams, the distance between the flanges 14 of the two c-shaped beams is the width of the narrow flange portion 24a of the end connector 2, that is, the narrow flange portion 24a is accurately fitted to be equal to the width of the second transverse direction of the narrow flange portion 24a. In this way, in a state where the body beams 11 and 12 made of two U-shaped beams are installed to form the body 1, the end connector 2 approaches the end of the body 1 in the horizontal direction and is integrally combined . Unlike this, in a state where the end connection body 2 is placed, each of the two body beams 11 and 12 is approached in the horizontal direction toward the end connection body 2, so that the two body beams 11 and 12 and the end connection body ( 2) may be integrally combined to manufacture the multi-web reinforcing beam 100.

In arranging the two body beams 11 and 12 side by side, if necessary, a connecting plate 5 made of a steel plate is attached to the flange 14 of the two body beams 11 and 12 in close contact at the same time, After installation, the two body beams 11 and 12 may be integrally connected to each other by firmly attaching them by a method such as welding.

When the two body beams 11 and 12 and the end connector 2 are placed in close contact with each other by the above method, the narrow flange portion 24a of the end connector 2 forms two body beams 11 , 12) is sandwiched between. That is, in the case of the first embodiment illustrated in FIGS. 1 to 3, the narrow flange portion 24a is inserted into the insertion space S created by the gap between the flanges 14 of the two c-shaped steel beams. Accordingly, the thickness portion of the narrow flange portion 24a is in close contact with each of the two body beams 11 and 12, and at the same time, the thickness portion of the flange 14 in the longitudinal direction in each of the two body beams 11 and 12 is It adheres to the thickness of the L-shaped step 25 of the end connector 2. That is, the flange thickness portion of the standard H-shaped beam constituting the end connecting body 2 is in close contact with the body beams 11 and 12. In this way, by performing the welding operation along the part where the thickness part is in close contact, the end connector 2 and the main body 1 are jointed and integrated.

In a state where the end connector 2 and the body 1 are integrated, the flange 14 of the two body beams 11 and 12 constituting the body 1 and the flange of the end connector 2, if necessary. It is also possible to attach and install the reinforcing plate 3 integrally so as to be in close contact with all at the same time. That is, after placing the reinforcing plate 3 made of a steel plate extending in the longitudinal direction so as to be in close contact with the two body beams 11 and 12 and the end connector 2 at the same time, the reinforcing plate 3 by welding or the like And the two body beams (11, 12), and the reinforcing plate (3) and the end connector (2) can be integrated, respectively. At this time, the reinforcing plate 3 does not completely cover the entire length of the end connector 2 in the longitudinal direction, and the outer surface of the flange is exposed toward the end side of the end connector 2. This is to adhere closely to the joint plate 4 used when connecting the end connector 2 and the main beam 200 made of standard H-beams to each other, as will be described later.

The multi-web reinforcing beam 100 according to the first embodiment of the present invention having the above assembly configuration exhibits greater structural rigidity and performance than standard H-beam beams. 6 (a) to (c) are schematic longitudinal plan views and cross-sectional views showing the longitudinal cross-sectional configuration of the multi-web reinforcing beam 100 according to the first embodiment of the present invention, respectively. 6 (a) is a schematic plan view in the longitudinal direction along the arrow A-A in FIG. 3, and FIG. 2) is a schematic longitudinal cross-sectional view along the arrow BB in FIG. 3 corresponding to the position where the narrow flange portion 24a exists, and FIG. 6 (c) shows the body beams 11 and 12 and the reinforcement plate 3 A schematic longitudinal sectional view along arrow C-C in FIG. 3 corresponding to the provided position.

As shown in (c) of FIG. 6, in the case of the body 1 portion of the multi-web reinforcing beam 100, the web 13 is longitudinally directed by the two body beams 11 and 12 arranged to face each other. A cross-sectional shape of a box shape in which two webs 13 exist is made. The portion of the main body 1 to which the reinforcing plate 3 is attached has a longitudinal cross-sectional shape in the form of a complete box having a closed square cross-section. In particular, in the case of the first embodiment in which the body beams 11 and 12 are made of c-shaped beams in the multi-web reinforcing beam 100, as shown in FIG. 6 (b), the end connector 2 between the c-shaped beams In the portion where the narrow flange portion 24a is fitted, one web 23 of the standard H-beam beam of the end connector 2 is added in addition to the two webs 13 of the two C-shaped beams. A box-shaped cross-section with three webs is created.

In this way, the multi-web reinforcing beam 100 has a box-shaped cross-sectional shape in which two webs exist in the area composed of only the main body 1, and in the end area of the main body 1 to which the end connector 2 is coupled, the box In addition to the shape, it becomes a cross-sectional shape in which three webs exist, so that it has a cross-sectional structure having a plurality of webs as a whole, and thus has a very large cross-sectional stiffness. As a result, it has great bending, shear and compression stiffness, and thus the effect of increasing resistance is exerted. In particular, when the multi-web reinforcing beam 100 of the present invention is used for a thumb pile, it is possible to place the multi-web reinforcing beam 100 in a section where the back earth pressure acts greatly, and in this case, lateral buckling due to bending occurs can be prevented, and in actual design, the upper limit of the allowable bending and compressive stress can be applied, so the advantage of being able to design very economically is exhibited.

As described above, the standard H-shaped steel beam constituting the end connector 2 has the same standard as the main beam 200 to be integrally connected. That is, as described above, the end connecting body 2 is made of a general H-beam beam having the same standard as the main beam 200 to be integrally connected. And the end side to be connected to the main beam 200 in the end connection body 2 is made of a normal flange portion 24b where the flange is not reduced in width. Therefore, as illustrated in (a) of FIG. 6, the longitudinal cross-sectional shape and size of the end side to be connected to the main beam 200 in the end connector 2 are the same as the standard H-beam beam constituting the main beam 200 . Therefore, in serializing the main beam 200 integrally coupled to the longitudinal end of the multi-web reinforcing beam 100, that is, to the end connector 2, standard H-beams having the same cross-sectional size and shape are combined with each other. The conventional "simple beam coupling method" applied when integrating, that is, by placing the joint plate closely on the flange and / or web of the standard H-beam to be continuous, and by welding or bolting, the standard H-beam beams are connected to each other and continued Alternatively, various conventional "simple beam coupling methods" such as a method in which cross-sectional thickness portions of standard H-beam beams are connected by welding in direct contact with each other may be used as they are. As such, in the present invention, the "simple beam coupling method" used when integrating standard H-shaped steel beams having the same cross-sectional size and shape with each other can be used as it is for integral continuation between the multi-web reinforcing beam 100 and the main beam 200. The benefits of being there will come into play.

7 is a schematic exploded perspective view showing a configuration in which the main beam 200 is integrally coupled to the longitudinal end of the multi-web reinforcing beam 100 according to the first embodiment of the present invention and serialized, and FIG. 8 A schematic assembly perspective view showing a configuration in which the multi-web reinforcing beam 100 and the main beam 200 are integrally continuous by the continuation operation shown in FIG. 7 is shown. As described above, in the present invention, the end connector 2 is composed of a standard H-beam beam having the same cross-sectional shape and size as the main beam 200 to be connected. That is, after selecting a standard H-shaped steel beam having the same cross-sectional shape and size as the main beam 200 to be connected, preparing the necessary length, and then having the narrow flange portion 24a and the top flange portion 24b as described above, the end connector (2) can be prepared. Therefore, in combining and serializing the multi-web reinforcing beam 100 having such an end connector 2 and the main beam 200, the end face of the main beam 200 and the end face of the end connector 2 After adhering to each other, as illustrated in FIGS. 7 and 8, the joint plate 4 made of steel plates is simultaneously attached to the web 213 of the main beam 200 and the web 23 of the end connector 2, respectively. It is arranged overlapping as much as possible and integrally attached by welding, etc., and in parallel with this, the joint plate 4 made of steel plates is overlapped so as to be in close contact with the flange 214 of the main beam 200 and the flange of the end connector 2 at the same time. By arranging and integrally attaching the main beam 200 and the end connector 2 by welding or the like, the main beam 200 and the multi-web reinforcing beam 100 can be integrally continuous. In the drawing, only one end of the longitudinal direction of the multi-web reinforcing beam 100 is shown, but as described above, end connectors 2 may be provided at both ends in the longitudinal direction of the multi-web reinforcing beam 100, and in this case, both ends of the In the end connector 2, the main beams 200 may be integrally connected to each other in the same manner as above.

In this way, in the present invention, in the case of integrally combining the multi-web reinforcing beam 100 and the main beam 200 for continuation, as in the case of integrating standard H-beams having the same cross-sectional size and shape with each other, the H-beam beam It is possible to use the "simple beam coupling method" that welds or bolts by overlapping the joint plate to the web and flange so that they are in close contact. Therefore, in the present invention, unlike the prior art, it is possible to quickly and conveniently combine the multi-web reinforcing beam 100 and the main beam 200 integrally and continuously in the field, thereby maximizing field work efficiency and shortening the construction period. This has the effect of significantly reducing construction costs.

9 is a schematic perspective view of the assembly of the multi-web reinforcing beam 100 according to the second embodiment of the present invention, and FIG. 10 is a schematic diagram showing the assembly structure of the multi-web reinforcing beam 100 shown in FIG. An exploded perspective view of phosphorus is shown. In the multi-web reinforcing beam 100 according to the second embodiment of the present invention illustrated in FIGS. 9 and 10, the two body beams 11 and 12 constituting the body 1 are the same as in the case of the first embodiment described above. Similarly, it is made of c-shaped beams and the webs 13 are arranged to face each other side by side, but unlike the first embodiment, two c-shaped beams in a form in which the flanges 14 of each of the c-shaped beams extend toward each other have a configuration in which they are arranged facing each other. In the multi-web reinforcing beam 100 according to the second embodiment, the end connection body 2 is integrally coupled to both longitudinal ends or one end of the body beams 11 and 12, and the end connection provided in the second embodiment Since the sieve 2 is exactly the same as that described in relation to the first embodiment, a repeated description thereof will be omitted.

In the second embodiment, in arranging the two c-shaped beams corresponding to the body beams to face each other in order to combine the body beams 11 and 12 and the end connector 2, the two c-shaped beams face each other Between the viewing flanges 14, there is an insertion space S into which the narrow flange portion 24a of the end connector 2 is inserted. At this time, the width of the insertion space (S) is the same as the width of the second transverse direction of the narrow flange portion (24a), therefore, when the body beam and the end connecting body (2) are coupled, the narrow flange portion (24a) is inserted as described above. It is precisely fitted into the space (S).

Place the two c-beam beams and the end connector 2 at a position to be joined to each other so that the narrow flange portion 24a of the end connector 2 is inserted into the insertion space S between the two c-beam beams. If there is, as in the first embodiment described above, in the second embodiment, the end connection body 2 and the main body 1 are bonded and integrated by performing a welding operation along the part where the thickness part is in close contact. In the same manner as in the first embodiment, in the second embodiment, if necessary, the reinforcing plate 3 may be added and integrally installed.

11 (a) to (c) are schematic longitudinal plan views and cross-sectional views showing the longitudinal cross-sectional configuration of the multi-web reinforcing beam 100 according to the second embodiment of the present invention, respectively. 11 (a) is a schematic plan view in the longitudinal direction along the arrow D-D in FIG. 9, and FIG. 11 (b) is a multi-web reinforcing beam 100 of the body beams 11 and 12 and the end connectors ( 2) is a schematic longitudinal cross-sectional view along the arrow E-E in FIG. 9 corresponding to the position where the narrow flange portion 24a exists, and FIG. 11 (c) shows the body beams 11 and 12 and the reinforcing plate 3 A schematic longitudinal cross-sectional view along the arrow F-F in FIG. 9 corresponding to the provided position.

As shown in (a) to (c) of FIG. 11, in the multi-web reinforcing beam 100 according to the second embodiment of the present invention, only the reinforcing plate 3 is attached to the c-shaped beam in the main body 1 has a cross-sectional shape in the form of a complete box with a closed square cross-section in which two webs 13 exist, and the narrow flange portion 24a of the end connector 2 is inserted between the c-shaped steel beams In addition to this box-shaped cross-sectional shape, one web 23 of the standard H-beam beam of the end connector 2 additionally exists in the part to have a cross-sectional shape with three webs. Therefore, like the first embodiment, the second embodiment also has very large bending, shear and compression stiffness, and thus the effect of increasing the resistance is exerted, and when used for thumb piles, prevention of buckling occurs, in actual design Advantages are exhibited according to the application of the upper limit of the allowable bending-compressive stress.

In particular, as illustrated in FIG. 11 (a), in the multi-web reinforcing beam 100 according to the second embodiment, as in the first embodiment, the longitudinal end shape and size match the main beam 200 to be connected. Therefore, in the second embodiment, the main beam 200 is easily attached to the end of the multi-web reinforcing beam 100 by using the "simple beam coupling method" applied when integrating standard H-shaped steel beams having the same cross-sectional size and shape with each other. You can easily connect.

Even in the multi-web reinforcing beam 100 according to the second embodiment, when the body 1 is formed by arranging the two body beams 11 and 12 side by side, the aforementioned spacing adjusting member 8 can be used. 12 is a schematic exploded perspective view showing the installation of the spacing adjusting member 8 between the two c-shaped beams in the second embodiment shown in FIGS. 9 to 11, and in FIG. 13 (a) Following the state of Figure 12, a schematic assembly perspective view showing a state in which the installation of the spacing adjustment member 8 is completed is shown, and in Figure 13 (b) is a schematic plan view of the state shown in Figure 13 (a) is shown. In installing the spacing adjustment member 8 in the manner described above between the two c-shaped steel beams constituting the body beams 11 and 12 in the multi-web reinforcing beam 100 according to the second embodiment, only one may be installed, but the drawing As shown in , two may be installed, and in particular, they may be installed in different vertical installation positions. Since the contents of the first embodiment are equally applied to other matters of the multi-web reinforcing beam 100 according to the second embodiment, including the matter of the spacing adjusting member 8, a repeated description thereof will be omitted.

Furthermore, in manufacturing the multi-web reinforcing beam 100 according to the present invention, as two body beams 11 and 12 constituting the body 1, each upper and lower flange 34 and one web 33 It is also possible to use an "I-beam" having a cross-sectional shape in the longitudinal direction of the English letter I shape. 14 is a schematic perspective view of the assembly of the multi-web reinforcing beam 100 according to the third embodiment of the present invention, and FIG. 15 is a schematic diagram showing the assembly structure of the multi-web reinforcing beam 100 shown in FIG. An exploded perspective view of phosphorus is shown. In the multi-web reinforcing beam 100 according to the third embodiment of the present invention illustrated in FIGS. 14 and 15, the two body beams 11 and 12 constituting the body 1 are respectively upper and lower flanges 34 and one web 33, and is composed of an "I-beam" having a cross-sectional shape in the longitudinal direction of the English letter I.

In the case of the third embodiment, as in the first and second embodiments described above, both ends or ends in the longitudinal direction of the body beams 11 and 12 are end connectors 2 having the same configuration as those provided in the first and second embodiments. is integrally coupled. Also in the third embodiment, the two I-beam beams corresponding to the body beams 11 and 12 are located adjacent to each other in the second transverse direction so that the webs 33 face each other side by side.

At this time, at the end of the two I-beam beams in the direction in which the end connectors 2 are coupled, a portion of the flanges 34 adjacent to each other of the I-beam beams is cut, thereby narrowing the flange portion of the end connectors 2. An insertion space (S) into which (24a) is inserted is formed. In arranging the two I-beam beams corresponding to the body beams 11 and 12 side by side to face each other, the flanges 34 of the I-beam beams can contact each other in the second transverse direction, as illustrated in the drawing, At the end of each I-beam beam in the direction in which the end connector 2 is coupled, a cutout is formed by a width corresponding to 1/2 of the width of the second transverse direction of the narrow flange portion 24a, and the two I-beams When the beams are adjacent to each other, the cutout is continuous and the insertion space (S) into which the narrow flange portion (24a) of the end connector (2) is inserted is created. In the drawing, as two I-beam beams are arranged side by side, the flanges 34 of the I-beam beams are in contact with each other in the second transverse direction, but depending on the width of the flanges 34, the flanges 34 do not touch each other. Maybe not.

Since the end connector 2 provided in the third embodiment is the same as that described in relation to the first embodiment, a repeated description thereof will be omitted.

In the third embodiment, the two I-beam beams and the end connector 2 are disposed at a position to be joined to each other so that the narrow flange portion 24a of the end connector 2 is cut at the end of the two I-beam beams. When in a state inserted into the insertion space (S) made by, as in the first and second embodiments described above, welding work is performed along the part where the thickness part is in close contact to connect the end connector 2 and the main body 1. join together to unite. In addition, as in the first and second embodiments, in the third embodiment, the reinforcing plate 3 may be added and integrally installed as needed.

16 (a) to (c) are schematic longitudinal plan views and cross-sectional views showing the longitudinal cross-sectional configuration of the multi-web reinforcing beam 100 according to the third embodiment of the present invention, respectively. Figure 16 (a) is a schematic plan view in the longitudinal direction along the arrow G-G in Figure 14, Figure 16 (b) is the body beams 11, 12 and end connectors in the multi-web reinforcing beam 100 ( 2) is a schematic longitudinal cross-sectional view along the arrow H-H in FIG. 14 corresponding to the position where the narrow flange portion 24a exists, and FIG. 16 (c) shows the body beams 11 and 12 and the reinforcing plate 3 A schematic longitudinal sectional view along the arrow M-M in FIG. 14 corresponding to the provided position.

As shown in (a) to (c) of FIG. 16, in the multi-web reinforcing beam 100 according to the third embodiment of the present invention, only the reinforcing plate 3 is attached to the I-beam in the main body 1 The part has a complete box-shaped cross-section with a closed square cross-section, and in the case of the part where the narrow flange portion 24a of the end connector 2 is inserted between the I-beams, the box-shaped In addition to having a cross-sectional shape, in addition to the two webs 33 of the two I-beams, there is one more web 23 of the H-beam of the end connector 2, so that three It has a cross-sectional shape with a web. Therefore, like the first and second embodiments, the third embodiment has very large bending, shear and compression stiffness, and thus the resistance is increased, preventing buckling when used for thumb piles, and actual design Advantages are exhibited according to the application of the upper limit of the allowable bending and compression stress in

Even in the case of the third embodiment, as illustrated in (a) of FIG. 16, the shape and size of the longitudinal end of the multi-web reinforcing beam 100 coincide with the main beam 200 to be connected. Therefore, in the third embodiment, as in the first and second embodiments, the end of the multi-web reinforcing beam 100 is used by using the "simple beam coupling method" applied when integrating standard H-shaped steel beams having the same cross-sectional size and shape with each other. It is possible to easily and conveniently connect the main beam 200 to. Since the contents of the first and second embodiments are equally applied to the multi-web reinforcing beam 100 according to the third embodiment, a repeated description thereof will be omitted.

The multi-web reinforcing beam 100 according to various embodiments of the present invention described above can be used to construct a thumb pile used in a retaining structure. The thumb pile according to the present invention is a "composite thumb pile" having a continuous configuration in which the main beam 200 made of standard H-shaped steel beams and the multi-web reinforcing beam 100 of the present invention described above are integrated. In the composite thumb pile of the present invention, the main beam 200 may be integrally coupled to both ends in the longitudinal direction of the multi-web reinforcing beam 100 to be continuous, but if necessary, the longitudinal direction of the multi-web reinforcing beam 100 Only once, the main beam 200 may be integrally combined and serialized. In addition, in the composite thumb pile of the present invention, the multi-web reinforcing beam 100 may be located at one location throughout the longitudinal length, but may be located at two or more plural locations. For example, from top to bottom in the longitudinal direction, "main beam 200 - multi-web reinforcing beam 100 - main beam 200 - multi-web reinforcing beam 100 - main beam 200" Arranged in the order It could be.

The retaining structure according to the present invention uses a composite thumb pile having a continuous configuration in which the main beam 200 made of the standard H-shaped steel beam described above and the multi-web reinforcing beam 100 of the present invention described above are integrated. The earth retaining structure according to the present invention, for example, may have a configuration in which a plurality of composite thumb piles are erected and installed vertically at intervals in the second transverse direction, and an earth plate is inserted between the composite thumb piles to support the back soil. there is.

17 is a schematic plan cross-sectional view showing only the portion where the soil plate 500 is inserted between the composite thumb piles in one example of the retaining structure according to the present invention. The multi-web reinforcing beam 100 of the present invention used in the composite thumb pile illustrated in FIG. 17 corresponds to the embodiment described above with reference to FIGS. 4 and 5 (a) and (b), and the spacing adjusting member ( 8) is shown in FIG.

18, as another example of the earth retaining structure according to the present invention, a schematic cross-sectional view showing a portion in which shotcrete walls 510 are formed on both sides of the composite thumb pile in the second transverse direction is shown. The multi-web reinforcing beam 100 of the present invention used in the composite thumb pile illustrated in FIG. 18 also corresponds to the embodiment described with reference to FIGS. 4 and 5 (a) and (b) as in the case of FIG. 18 shows a planar cross-sectional configuration for the position where the spacing adjustment member 8 is installed.

On the other hand, Figure 19 shows a schematic plan cross-sectional view corresponding to Figure 17 for another embodiment of the retaining structure according to the present invention, the multi-web reinforcing beam of the present invention used for the composite thumb pile illustrated in Figure 19 Reference numeral 100 corresponds to the embodiment previously described with reference to FIGS. 12 and 13 (a) and (b). And Figure 20 shows a schematic plan cross-sectional view corresponding to Figure 18 for another example of the earth retaining structure according to the present invention, the multi-web reinforcing beam (100) of the present invention used for the composite thumb pile illustrated in Figure 20 ) also corresponds to the embodiment described above with reference to FIGS. 12 and 13 (a) and (b). all. In the case of the embodiment illustrated in FIGS. 19 and 20, the second transverse direction of the c-shaped beam corresponding to the body beams 11 and 12 by fastening the a-beam having a cross section in the shape of the letter A to the spacing adjusting member 8 By installing on the outside, the A-beam can be usefully used for the installation of the earth plate 500 and the formation of the shotcrete wall 510.

In addition, the retaining structure according to the present invention may be a column-type retaining wall (CIP retaining structure). In this column-type retaining wall, as in the prior art, a plurality of vertical underground holes are continuously perforated in the second transverse direction, and after inserting and arranging thumb piles in each underground hole, soil cement, concrete, etc. It can be constructed by filling the fill material and forming the piles in succession so that the piles are buried. At this time, the piles inserted into the hole and embedded in the fill material are the composite piles of the present invention described above, that is, standard H It is a "composite thumb pile" having a continuous configuration in which the main beam 200 made of a section steel beam and the multi-web reinforcing beam 100 are integrated. 21 and 22 are schematic cross-sectional views showing that the composite pile of the present invention is inserted into the underground hole 600, respectively. For convenience, FIGS. 21 and 22 show a planar cross-sectional configuration for the position where the spacing adjusting member 8 is installed in the multi-web reinforcing beam 100, and FIG. 21 shows FIGS. 4 and 5 (a) and (b) It corresponds to the embodiment described with reference to, and FIG. 22 corresponds to the embodiment described with reference to FIGS. 12 and 13 (a) and (b).

The earth retaining structure according to the present invention is not limited to those exemplified above, and all existing various types of earth retaining structures using a vertical beam are included. That is, if the composite thumb pile of the present invention having a configuration in which the main beam 200 made of the standard H-shaped steel beam described above and the multi-web reinforcing beam 100 are integrated and continuous is used, the CIP method (Cast in Place prepacked pile) Various retaining structures and their construction methods, such as a retaining wall (retaining structure), a retaining wall using the SCW (Soil Cement Wall) method, a slurry wall, and the like, all fall under the retaining structure and its construction method according to the present invention. It can.

In this way, when constructing an earth retaining structure using the "composite thumb pile" according to the present invention, it is possible to increase the installation interval or reduce the number of installations of the composite thumb pile in the second lateral direction, thereby increasing construction efficiency and It has the advantage of being able to perform more economical construction by reducing construction materials and reducing construction cost and construction period.

Above, as an example of what was made by combining and serializing the multi-web reinforcing beam 100 and the main beam 200 integrally according to the present invention, the thumb pile of the earth retaining structure was exemplified and named "composite thumb pile", but the present invention According to the multi-web reinforcing beam 100 and the main beam 200 integrally combined and serialized, it is not limited to being used only for the purpose of these thumb piles, and can be used as beam members, girders, etc. for various purposes and functions. .

1: body
2: end connector
3: reinforcement plate
11, 12: body beam
100: multi-web reinforcing beam
200: main beam

Claims (6)

As a multi-web reinforcing beam 100 integrally coupled at both ends or one end in the longitudinal direction with the main beam 200 made of standard H-shaped steel beams,
A body 1 made of two body beams 11 and 12 extending in the longitudinal direction and arranged side by side at intervals such that the webs of the body beams 11 and 12 face each other;
For connection with the main beam 200, it is made of a standard H-shaped steel beam having the same cross-sectional size and shape as the main beam 200, and is integrally coupled to one end or both ends in the longitudinal direction of the main body 1 End connector ( 2);
Each of the two body beams 11 and 12 is made of a c-shaped steel beam having a web 13 and a flange 14, and the c-shaped steel beam corresponding to the body beams 11 and 12 have flanges 14 connected to each other. The webs 13 extending in opposite directions are disposed facing each other to form the main body 1;
The end side coupled to the main body 1 in the flange of the end connection body 2 consists of a narrow flange portion 24a in which the width of the flange is reduced, and the end side coupled to the main beam 200 has a reduced flange width. It consists of a top flange portion 24b that has not been formed;
At the end of the body 1, an insertion space S having the same size as the narrow flange portion 24a is formed by the gap between the two c-shaped beams corresponding to the body beams 11 and 12;
The narrow flange portion 24a is inserted into the insertion space S so that the end connection body 2 and the main body 1 are bonded and integrated to form an integrated structure;
By having a plurality of webs, it has reinforced cross-sectional rigidity, and at the same time, structural rigidity is increased, and it is integrally continuous with the main beam 200 at the longitudinal end by coupling between standard H-beams having the same cross-sectional size and shape. A multi-web reinforcing beam, characterized in that it can be. According to claim 1,
Multi-web, characterized in that the reinforcing plate (3) is added and integrally installed so as to adhere to both the flange of the two body beams (11, 12) and the flange of the end connector (2) constituting the body (1) reinforcement beam. As a thumb pile for earth retaining structures,
At both ends or one end in the longitudinal direction of the multi-web reinforcing beam according to claim 1 or 2, the main beam made of standard H-shaped steel beams having the same cross-sectional size and shape as the end connector 2 of the multi-web reinforcing beam ( 200) is a composite pile, characterized in that it has a configuration that is integrally combined.
According to claim 3,
The end face of the main beam 200 and the end face of the end connector 2 are bonded in close contact with each other, and the joint plate 4 made of steel plates is connected to the web of the main beam 200 and the end connector 2, respectively. It is overlapped and integrally attached so as to be in close contact with the web of the, and the joint plate 4 made of a steel plate is overlapped so as to be in close contact with the flange of the main beam 200 and the flange of the end connector 2, respectively, and integrally attached. A composite thumb pile, characterized in that the integral coupling between the multi-web reinforcing beam and the main beam 200 is formed by being attached.
As a retaining structure built using thumb piles,
The thumb pile is a retaining structure, characterized in that the composite thumb pile according to claim 1 or 2.
As a method of constructing a retaining structure using a thumb pile,
The thumb pile is a construction method of a retaining structure, characterized in that the composite thumb pile according to claim 1 or 2.

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