KR20100042830A - Flange-reinforced composite member and strut structure of retaining wall using the same - Google Patents

Abstract

PURPOSE: A flange reinforced composite member and a retaining wall using the same are provided to improve construction performance by using the flange reinforced composite member as a pile member. CONSTITUTION: A flange reinforced composite member comprises a H-steel(120), reinforcing materials(130), tendons(140), and Precast Concrete parts(150). The H-steel is composed of flanges(121) and a web(122). The reinforcing materials are fixed to the H-steel, and form inner spaces. The tendons are arranged in the inner spaces of the reinforcing materials. The PC parts are formed by placing concrete in the inner spaces of the reinforcing materials.

Description

Flange-reinforced composite member and strut structure of retaining wall using the same}

The present invention maximizes the strength by reinforcing the flange of the T- or H-shaped steel without increasing the cross-section, while reinforcing only the corner portion of the T- or H-steel to minimize the weight of the flange reinforced composite member, and using this as a pile member The present invention relates to an earthquake support structure having improved workability.

In general, an underground structure is preceded by the earthquake construction that excavates the inside of the earthquake wall while constructing the earthquake wall and carrying out the support project.

The most common method of constructing the retaining wall is to construct the retaining wall with the H-pile and the board pile. In this method, after inserting the H-peg into the ground at a predetermined interval, the board pile is placed between the flanges of neighboring H-pile. It is a method of completing the retaining wall by laminating and inserting. The reinforcement work is to install additional earth pressure support to prevent the wall from collapsing. The earth pressure support is mainly used for horizontal strut, rock bolt or earth anchor.

On the other hand, in order to effectively support the earth pressure in the earthquake construction it is necessary to increase the strength of the earth wall itself or install a lot of earth pressure support at a narrow interval.

However, installing a large number of earth pressure supporting members at narrow intervals is not preferable because it leads to air delay and increase in construction cost in relation to workability. In addition, when the earth pressure support is installed at a narrow interval, the earth pressure support interferes with the building part of the underground building, as shown in FIG.

Therefore, in general, a method of increasing the load capacity of the retaining wall itself is adopted rather than installing a large number of narrow gaps. However, the method of increasing the strength of the retaining wall itself is also not very advantageous. In order to increase the load capacity of the retaining wall, as shown in Fig. 1 (a), there is no choice but to use the H-peg with a large cross section, but the H-peg with a large cross-section increases the cost of steel, increasing the material cost and drilling for H-penetration. This is because the size of the caliber is reduced, which reduces the workability.

Accordingly, the present inventors have developed a support structure for earthquake support which can increase the installation interval of earth pressure support, and have also developed a composite member that can be preferably used for such support structure.

The present invention was developed to solve the above-mentioned problems, the flange reinforcement composite member to minimize the weight while maximizing the strength by reinforcing the flange of the T-shaped steel or H-shaped steel without increasing the cross-section, and used as a pile member By doing so, there is a technical problem in providing a support structure for improving the soilability.

The present invention to solve the above technical problem, T-shaped steel or H-shaped steel consisting of a flange and a web; L-angle, C-channel, box-shaped tube is selected from the two corners or four corners each of the flanges and the web meets the flange of the T- or H-shaped steel while forming a fixed inner space close to the T- or H-shaped steel fixed T Reinforcement is installed to be located inward than the flange end of the section steel or H-beam; A tension member disposed in a tensioned state in the reinforcing member inner space; And a PC portion in which concrete is poured into the reinforcing material inner space so that the tension material is embedded therein.

In addition, the present invention is a support structure for preventing the soil from collapsing, a plurality of sparsely installed so as to constitute a pile member of the wall of the wall, the flange reinforcement composite member is exposed to the reinforced flange surface is ground excavation ; It is installed between the flange-reinforced composite members, which are spaced apart, and constitutes a retaining wall together with the flange-reinforced composite members. The flange-reinforced composite members are installed inside the flange of T- or H-shaped steel to expose the surface by ground excavation. Board piles; A horizontal band installed in close contact with the flange of the T-shaped steel or the H-shaped steel exposed by the ground excavation in the flange-reinforced composite member to continuously or discontinuously surround the flange-reinforced composite member and the pile; And a earth pressure support constructed to be fixed to the horizontal band to support the earth pressure.

According to the present invention, the following effects can be expected.

First, it is possible to apply advantageously to various constructions because the cross section is not large but the strength is maximized while the weight is completed with a minimized form of the composite member.

Second, when the earthquake construction using the flange reinforcement composite member is used as the pile member, the earthquake bearing capacity is improved by the pile member, so that the earthquake construction can be performed while widening the installation interval between the strip and the earth pressure support. In addition, construction efficiency can be improved, and air shortening and construction cost can be reduced.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.

Flange reinforcement composite member 100 according to the present invention is a composite member reinforced with flanges (111, 121) of T-shaped steel or H-shaped steel with prestressed concrete, it is possible to minimize the weight while minimizing the cross-section while minimizing weight There are technical features to complete the form.

2 to 5 are various embodiments of the flange reinforcement composite member according to the present invention, Figure 2 is a form reinforcing one flange 111 of the T-shaped steel, Figure 3 reinforces only one flange 111 of the H-shaped steel 4 is a form in which both flanges 111 of the H-beams are reinforced, and FIG. 5 is a form in which both flanges 111 of the H-beams are reinforced and additionally reinforced by a connecting member 160. As shown, the flange reinforcement composite member 100 according to the present invention includes a T-shaped steel 110 or H-shaped steel 120, reinforcing material 130, tension member 140, PC portion 150 as an essential configuration , The connection member 160 includes an additional configuration.

T-shaped steel 110 is a steel member composed of one flange 121 and the web 122, H-shaped steel 120 is a steel member composed of both flange 121 and the web 122. In the present invention, the T-shaped steel 110 or H-shaped steel 120 is adopted as a basic steel frame member constituting the composite member.

The reinforcement member 130 is a member selected from an L-angle, a c-channel, and a box-shaped tube (angular tube), and a closed inner space is formed at an edge where the flanges 111 and 121 and the webs 112 and 122 meet in a T- or H-steel. While forming it is a configuration that is tightly fixed to the T-shaped steel (110) or H-shaped steel (120). Figure 2 shows the shape of the two reinforcement is installed on the two corners of the T-shaped steel, Figure 3 shows the shape of two reinforcement is installed on the two corners of the H-beam, in Figure 4 the four reinforcement is four corners of the H-beam Shows the type installed in. As such, the reinforcement is installed symmetrically about the webs 112 and 122 of the T- or H-steel.

The reinforcement 130 is installed to be located inward from the ends of the flange (111, 121) of the T-shaped steel or H-shaped steel, so as to maximize the strength of the flange reinforcement composite member 100 according to the present invention without increasing the cross section It can be completed in a form that can minimize the weight, and further can use the flange reinforcement composite member 100 according to the present invention as a pile member for the construction of the retaining wall. The reinforcing material 130 may be a material such as steel, FRP.

The tension member 140 is configured to be disposed in a tensioned state in the internal space of the reinforcement 130 with members such as steel bars and steel wires, and the PC part 150 has concrete in the internal space of the reinforcement 130 so that the tension material 140 is embedded. It is formed by pouring.

The tension member 140 may be directly fixed to the H-beam 120 in a tense state. In this case, since the tension force of the tension member 140 is also transmitted to the H-beam 120, the T-beam or H-beam flanges 111 and 121. Prestressing effect can be expected. In this case, the tension member 140 follows a conventional fixing method.

Meanwhile, FIG. 5 is an example in which the connecting member 160 is additionally configured as the flange reinforcing composite member 100 having the shape of reinforcing both flanges of the H-shaped steel, and the connecting member 160 has side surfaces of two reinforcing members 130 facing each other. It is a member installed to connect with each other. The connection member 160 constrains the two reinforcement members 130 installed apart from each other so that both flanges 121 of the H-shaped steel can be integrated with each other. The connecting member 160 is advantageously installed to be continuously connected to the truss shape in the longitudinal direction of the H-shaped steel (120). As the connecting member 160, a material such as steel, FRP, etc. may be adopted, and a shape such as a plate, an angle, and a box-shaped tube (angle tube) may be adopted.

As described above, the flange reinforcement composite member 100 according to the present invention is installed in contact with the reinforcement 130 to the T-shaped steel or H-shaped steel flanges (111, 121) while the tension member 140 in the reinforcement 130 is PC It is completed in a shape that is constrained to the portion 150, as a result of the reinforcement member 130, the tension member 140, the reinforcement of the flange (111, 121) of the T-shaped steel or H-shaped steel by the synthetic force of the PC portion 150. In particular, while reinforcing the corner portion of the T-shaped steel (110) or H-shaped steel (120) that is weak in bending resistance and shear resistance to the lateral force while forming a PC portion 150 only in the corner portion, to maximize the strength It is possible to minimize the increase in weight. Such flange reinforcement composite member 100 can be suitably used as a pile member, pillar member, beam member, etc. in the construction of steel structures.

6a and 6b show the earth support structure completed using the flange reinforcement composite member 100 of FIG. 5 as a pile member, and looks at the earth support structure according to the present invention with reference to this.

According to the present invention, the support structure according to the present invention uses the flange reinforcement composite member 100 as described above as a pile member, and constructs the support wall with the board pile 200, installs the horizontal belting unit 300 on the retaining wall, and the horizontal belting unit. The earth pressure supporting member 400 is fixed to the 300 and is completed.

Specifically, the retaining wall is installed as a pile member by driving a plurality of flange reinforced composite members 100 in a sparsely ground and then into the T-shaped steel or H-shaped steel flanges (111, 121) between the flange reinforced composite members (100) It is completed by hanging the board pile 200. When the ground excavation is completed after completion of the retaining wall, the flanges 111 and 121 of the T-shaped steel or the H-shaped steel are exposed in the flange reinforcement composite member 100, and the horizontal strip 300 is exposed from the flange reinforcement composite member 100. It is installed in close contact with the flange (111, 121) of the T-shaped steel or H-shaped steel to be continuous or discontinuously surrounds the retaining wall. In addition, the earth pressure support 400 is installed in a structure that supports the earth pressure so that the earthen wall does not fall, typically a horizontal brace, rock bolt (rock bolt), earth anchor (earth anchor), etc. may be selected according to the method.

In particular, Figures 6a and 6b shows an example of the construction of a rock bolt or earth anchor with the earth pressure support 400, for this purpose unit units 310 are firstly spaced in two rows; and two unit units 310 Connection plate 320 to connect; to prepare and install a horizontal band consisting of 300. The rock bolt or earth anchor is inserted between the unit unit 310 of the horizontal strip 300, the front end is fixed to the ground behind the board pile 200, while the rear end is fixed to the connecting plate 320 of the horizontal strip 300 It is constructed.

As described above, since the support structure according to the present invention uses the flange reinforcement composite member 100, the structural strength of the retaining wall itself is increased. Accordingly, the earth pressure resistance component directly supported by the retaining wall becomes large, and as a result, the construction can be performed while widening the installation interval between the horizontal strip 300 and the earth pressure supporting member 400. Also, as shown in FIG. 6B, the horizontal strip length 300 is installed so as to connect the two flange reinforcement composite members 100 in a spaced manner, thereby discontinuously surrounding the flange reinforcement composite member 100 and the board pile 200. Although it can be installed cheaply, in this case, it is preferable to install the horizontal bands 300 arranged downward and upside down.

The present invention has been described in detail above with reference to the embodiments, but a person having ordinary skill in the art to which the present invention pertains will be capable of various substitutions, additions, and modifications without departing from the technical spirit described above. It is to be understood that such modified embodiments also fall within the protection scope of the invention as defined by the claims.

Figure 1 shows a conventional earth support structure and a composite member used therein.

2 to 5 show various embodiments of the flange reinforced composite member according to the present invention.

6A and 6B show a retaining structure completed using the flange reinforced composite member of FIG. 5.

<Description of the symbols for the main parts of the drawings>

100: flange reinforced composite member

110: T section steel

120: H section steel

130: reinforcement

140: tension material

150: PC part

160: connecting member

200: board pile

300: horizontal band

400: earth pressure support

Claims (8)

T-shaped steel 110 composed of one flange 111 and the web 112; It is selected from the L-shaped angle, c-channel, box-shaped tube is fixedly installed in close contact with the T-shaped steel 110 while forming a closed internal space at each of the two corners of the flange 111 and the web 112 meet the T-shaped steel. Reinforcement 130 is installed to be located inward than the end of the flange 111 of the T-shaped steel; A tension member 140 disposed in a tensioned state in the internal space of the reinforcement member 130; And, PC portion 150 is formed by placing concrete in the interior space of the reinforcing material 130 so that the tension member 140 is embedded; Flange reinforcement composite member, characterized in that comprising a. H-shaped steel 120 composed of both flanges 121 and the web 122; It is selected from the L-angle, C-channel, box-shaped tube is fixedly installed in close contact with the H-shaped steel 120 while forming a closed internal space at each of the two corners of the flange 121 and the web 122 of the H-shaped steel to meet each other. Reinforcement 130 is installed to be located inward than the end of the flange 121 of the H-shaped steel; A tension member 140 disposed in a tensioned state in the internal space of the reinforcement member 130; And, PC portion 150 is formed by placing concrete in the interior space of the reinforcing material 130 so that the tension member 140 is embedded; Flange reinforcement composite member, characterized in that comprising a. H-shaped steel 120 composed of both flanges 121 and the web 122; L-angle, c-channel, box-shaped tube is selected from the four flanges 121 and the web 122 of the four corners of the H-shaped steel forming a closed inner space in each of the four corners while being fixedly installed in close contact with the H-shaped steel 120 Reinforcement 130 is installed to be located inward than the end of the flange 121 of the H-shaped steel; A tension member 140 disposed in a tensioned state in the internal space of the reinforcement member 130; And, PC portion 150 is formed by placing concrete in the interior space of the reinforcing material 130 so that the tension member 140 is embedded; Flange reinforcement composite member, characterized in that comprising a. 4. The method of claim 3, The connection member 160 is installed while connecting the side of the two reinforcement member 130 facing each other; The connecting member 160 is a flange reinforced composite member, characterized in that selected from the plate, angle, box-shaped pipe. In claim 4, The connecting member 160 is a flange reinforcement composite member, characterized in that it is installed continuously in a truss form in the longitudinal direction of the H-shaped steel (120). As a retaining structure to prevent the soil from falling down, The flange reinforcement composite member 100 according to any one of claims 1 to 5, wherein a plurality of sparsely installed so as to constitute a pile member of the retaining wall are exposed to the ground by the surface of the reinforced flanges 111 and 121. ; Installed between the flange reinforcement composite member 100 spaced apart to form a retaining wall together with the flange reinforcement composite member 100, the flange of T-shaped steel or H-shaped steel in the flange reinforcement composite member 100 (111) , 121) the board pile 200 is installed to be caught in the inner surface to expose the surface by excavation; The flange reinforcement composite member 100 is installed in close contact with the flange (111, 121) of the T-shaped steel or H-shaped steel exposed by the ground excavation surrounding the flange reinforced composite member 100 and the board pile 200 continuously or discontinuously Horizontal band 300 becomes cheap; And, A earth pressure support member 400 which is constructed to be fixed to the horizontal strip length 300 to support the earth pressure; Soil support structure, characterized in that comprising a. In claim 6, The horizontal strip length 300, the unit unit 310 is spaced apart in two rows; and the connecting plate 320 for connecting the unit unit 310 in two rows; The earth pressure supporting member 400 is a rock bolt that is installed so that the front end is inserted between the unit unit 310 of the horizontal strip length to settle in the ground behind the board pile 200, while the rear end is fixed to the connecting plate 320 of the horizontal strip length A retaining structure characterized in that it is a rock bolt or earth anchor. In claim 7, The horizontal strip 300 is installed so as to connect the two flange reinforced composite member 100 in a spaced manner, so as to discontinuously surround the flange reinforced composite member 100 and the board pile 200 while Horizontal barrier support 300, characterized in that the earth support structure is installed so as to be staggered with each other.

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