H-pile having fitting-type bracket and method for constructing temporary earth-retaining structure

Abstract

Provided are: an H-pile having a fitting-type bracket; and a method for constructing a temporary earth-retaining structure by using same. The purpose of the present invention is to improve operating convenience by tensioning a tensile material while a bracket composed of a plurality of bracket members manufactured by using a shearing method is inserted into a flange, and at the same time, to efficiently reduce bending stress generated in an earth-retaining wall with the improved bracket structure.

Description

Thumb piles having insertion-type brackets and method for constructing temporary soil retaining structures using the same

[0001] The present invention relates to a thumb pile having a bracket of a fitting type and a method for constructing a temporary earth retaining structure using the same, and more specifically, to an improved self-supporting earth retaining technology of tensioning a tension member while a bracket composed of a plurality of bracket members manufactured by a shearing method instead of a conventional bolt-fastened type bracket is fitted to a flange.

[0002] Typically, at civil engineering or construction sites, temporary retaining structures are installed to prevent the soil located behind the excavated soil (i.e., the backing soil) from flowing into the excavated soil. Temporary retaining structures can consist of thumb piles, retaining plates, belts, and buttresses, and they prevent the space to be excavated from collapsing due to the pressure of the backing soil.

[0003] In this regard, Korean Patent Publication No. 10-2162467, which is a prior art document, discloses a thumb pile with prestress and a method for constructing a self-supporting temporary earth retaining wall using the same. However, the self-supporting temporary earth retaining wall construction method according to Korean Patent Publication No. 10-2162467 has problems such as poor convenience in work and construction and poor tensile effect of the tension member. Specifically, the self-supporting temporary earth retaining wall construction method according to Korean Patent Publication No. 10-2162467 has the inconvenience of having to form a separate insertion groove (234) in the hanging plate (230) of the hanging bracket (200a, 200b), and since the inner structure of the hanging bracket (200a, 200b) is complicated, it takes a lot of time and money to manufacture it. In addition, due to the structural limitations of the upper hanging bracket (200a), there is a problem that the eccentricity of the upper hanging bracket (200a) is small and, accordingly, the tensile effect by the tension member (300) is not large.

[0004] The present invention is to improve work convenience by tensioning a tension member while a bracket made of a plurality of bracket members manufactured in a sharing manner is fitted to a flange, and at the same time, to more efficiently reduce bending stress occurring in a retaining wall with an improved bracket structure.

[0005] According to the present invention, a beam member (110) is provided, which comprises a web (102), and a first flange (104a) and a second flange (104b) that are vertically connected to the web (102) on both sides of the web (102); an upper bracket (120) that is fitted to the first flange (104a) at the upper portion of the beam member (110); a lower bracket (130) that is fitted to the first flange (104a) while facing the upper bracket (120) at the lower portion of the beam member (110); And it includes a plurality of tension members (140) that extend along the longitudinal direction of the beam member (110) between the upper bracket (120) and the lower bracket (130) and are fixedly installed in the upper bracket (120) and the lower bracket (130), respectively, wherein the upper bracket (120) is composed of a first bracket member (120a) and a second bracket member (120b) that face each other and are spaced apart from each other by a predetermined distance based on the web (102) at the upper portion of the first flange (104a), and the first bracket member (120a) and the second bracket member (120b) include: a vertical plate (202) that extends along the longitudinal direction of the beam member (110) by a predetermined length from the front surface of the first flange (104a); a horizontal plate (204) that is formed by being vertically bent from one end of the vertical plate (202);And it is formed by a hanging plate (206) that is formed on the back of the first flange (104a) by being vertically bent from one end of the horizontal plate (204), and a first groove (204a) is formed on the other end side edge of the horizontal plate (204) of the first bracket member (120a), and a second groove (204b) is formed on the other end side edge of the horizontal plate (204) of the second bracket member (120b), and the first groove (204a) and the second groove (204b) are positioned to face each other so that a hollow portion (P) of a predetermined size is formed between the inner surface of the first groove (204a) and the inner surface of the second groove (204b) for the plurality of tension members (140) to pass through, and a fixing member (208) for fixing the plurality of tension members (140) is formed on the A thumb peg having a fitting-type bracket that is mounted on the upper portion of the horizontal plate (204) corresponding to the hollow portion (P) is provided.

[0006] The other end of the horizontal plate (204) may be formed to protrude a predetermined length in a direction vertically away from the front surface of the first flange (104a), and may have a curvature such that the protruding length from the front surface of the first flange (104a) to the other end of the horizontal plate (204) becomes smaller as it goes from the central portion of the first flange (104a) to the outside of the first flange (104a).

[0007] The first groove (204a) and the second groove (204b) can be formed on the other end edge of the horizontal plate (204) with the longest protrusion length.

[0008] At the lower end of the other end of the horizontal plate (204), a reinforcing member (210) is provided that vertically protrudes from the vertical plate (202) toward the other end of the horizontal plate (204) to support the other end of the horizontal plate (204), and the protrusion length of the reinforcing member (210) that vertically protrudes from the vertical plate (202) may become smaller as the reinforcing member (210) moves away from the horizontal plate (204).

[0009] The gap (d) between the first bracket member (120a) and the second bracket member (120b) may be formed to be equal to or greater than the thickness of the web (102) so that the first bracket member (120a) and the second bracket member (120b) do not interfere with the web (102) when fitted to the first flange (104a).

[0010] Between the first bracket member (120a) and the second bracket member (120b), a bar-shaped connecting member (212) that mutually fixes the first bracket member (120a) and the second bracket member (120b) may be provided.

[0011] The above fixing member (208) may be mounted on the upper portion of the horizontal plate (204) while covering the hollow portion (P), and may be provided with a plurality of fixing holes (208a) through which the plurality of tension members (140) may penetrate and be fixed.

[0012] The lower bracket (130) is composed of a first bracket member (130a) and a second bracket member (130b) that are spaced apart from each other by a predetermined distance from the web (102) at the lower portion of the first flange (104a), and the first bracket member (130a) and the second bracket member (130b) include: a vertical plate (302) formed to extend a predetermined length along the longitudinal direction of the beam member (110) from the front surface of the first flange (104a); a horizontal plate (304) formed to be vertically bent from one end of the vertical plate (302); And it is formed by a hanging plate (306) that is vertically bent from one end of the horizontal plate (304) and formed on the rear side of the first flange (104a), and a plurality of through holes (304a) for the plurality of tension members (140) to pass through can be formed at a predetermined interval in the horizontal plate (304).

[0013] On the outside of the horizontal plate (304), a plurality of separation prevention members (304b) are provided in parallel with the plurality of tension members (140) to support the plurality of tension members (140) so that the plurality of tension members (140) do not come off outside the lower bracket (130), and the plurality of separation prevention members (304b) can be formed perpendicular to the horizontal plate (304) while being adjacent to the plurality of through holes (304a).

[0014] According to the present invention, a method for constructing a temporary earth retaining structure using the thumb pile (100) is provided, comprising the steps of: manufacturing the thumb pile (100); tensioning a plurality of tension members (140) installed on the thumb pile (100) to a first size; excavating the ground (G) to a predetermined diameter and depth to form a perforation hole (H); embedding the thumb pile (100) with prestress introduced into the perforation hole (H); and tensioning the plurality of tension members (140) to a second size larger than the first size in a state where the thumb pile (100) is restrained by water compaction or soil.

[0015] According to the present invention, by using an upper bracket (120) and a lower bracket (130) formed of two bracket members having a symmetrical structure and manufactured in a sharing manner to fix and install a plurality of tension members (140), the convenience of work is improved, and at the same time, the bending stress occurring in the earth retaining wall can be more efficiently reduced with the improved bracket structure. The upper bracket (120) and the lower bracket (130) of the present invention can be respectively fitted to the upper and lower portions of the first flange (104a) while facing each other, and thus, separate bolt fastening is unnecessary.

[0016] In addition, the gap (d) between the first bracket member (120a) and the second bracket member (120b) and the gap (d) between the first bracket member (130a) and the second bracket member (130b) are formed to be equal to or greater than the thickness of the web (102) during the manufacturing process through shearing of the upper bracket (120) and the lower bracket (130), and accordingly, there is no need to form an insertion groove separately on one side to prevent interference with the web (102).

[0017] In this way, the structure of the upper bracket (120) and the lower bracket (130) of the present invention has superior advantages in terms of convenience of work and construction, cost, tensile effect, etc. compared to conventional thumb piles or earth retaining structures.

[0018] Figure 1 is a perspective view of a thumb peg according to one embodiment of the present invention.

[0019] Figure 2 is a side view of a thumb peg and an upper bracket according to one embodiment of the present invention.

[0020] Figure 3 is a drawing for explaining an upper bracket and a lower bracket according to one embodiment of the present invention.

[0021] Figure 4 is a drawing showing a detailed configuration of an upper bracket according to one embodiment of the present invention.

[0022] Figure 5 is a view of the upper bracket according to one embodiment of the present invention as viewed from above.

[0023] Figure 6 is a view of the upper bracket as viewed from below according to one embodiment of the present invention.

[0024] Figure 7 is a drawing showing a detailed configuration of a lower bracket according to one embodiment of the present invention.

[0025] Figure 8 is an example showing a detachment prevention member of a lower bracket according to one embodiment of the present invention.

[0026] Figure 9 is an example showing a detachment prevention member of a lower bracket according to another embodiment of the present invention.

[0027] Figure 10 is a drawing showing an example of a thumb stake installed according to one embodiment of the present invention.

[0028] Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The following detailed description is provided to facilitate a comprehensive understanding of the methods, devices, and / or systems described herein. However, these are merely examples and the present invention is not limited thereto.

[0029] In describing embodiments of the present invention, if a detailed description of a known technology related to the present invention is judged to unnecessarily obscure the gist of the present invention, the detailed description will be omitted. In addition, the terms described below are terms defined in consideration of their functions in the present invention, and this may vary depending on the intention or custom of the user or operator. Therefore, the definitions should be made based on the contents throughout this specification. The terminology used in the detailed description is only for the purpose of describing embodiments of the present invention and should not be limited in any way. Unless clearly used otherwise, the singular form includes the plural form. In this description, expressions such as "comprises" or "having" are intended to indicate certain features, numbers, steps, operations, elements, parts or combinations thereof, and should not be construed to exclude the presence or possibility of one or more other features, numbers, steps, operations, elements, parts or combinations thereof other than those described.

[0030]

[0031] Fig. 1 is a perspective view of a thumb pile (100) according to one embodiment of the present invention. As illustrated in Fig. 1, the thumb pile (100) according to one embodiment of the present invention includes a beam member (110), an upper bracket (120), a lower bracket (130), and a plurality of tension members (140), and prestress is introduced to reduce the buckling stress generated in the self-supporting soil retaining wall.

[0032] The beam member (110) may be formed of an H-beam having a constant length, and is composed of a web (102), and a first flange (104a) and a second flange (104b) that are vertically connected to the web (102) on both sides of the web (102). Here, the first flange (104a) is assumed to be a flange facing the back soil side, and the second flange (104b) is assumed to be a flange facing the excavated soil side.

[0033] The upper bracket (120) is fitted to the first flange (104a) at the upper portion of the beam member (110).

[0034] The lower bracket (130) is fitted to the first flange (104a) while facing the upper bracket (120) at the lower part of the beam member (110).

[0035] The tension member (140) extends along the longitudinal direction of the beam member (110) between the upper bracket (120) and the lower bracket (130) and is fixedly installed in the upper bracket (120) and the lower bracket (130), respectively. As an example, four tension members (140) may extend along the longitudinal direction of the beam member (110) between the upper bracket (120) and the lower bracket (130) and be fixedly installed in the upper bracket (120) and the lower bracket (130), respectively.

[0036] At this time, the upper bracket (120) and the lower bracket (130) can be fitted and connected to the upper and lower parts of the first flange (104a) while facing each other, and thus separate bolt fastening is unnecessary.

[0037] In addition, the upper bracket (120) may be formed of a first bracket member (120a) and a second bracket member (120b) that are spaced apart from each other by a predetermined distance from each other with respect to the web (102) at the upper portion of the first flange (104a). Here, the upper bracket (120) is manufactured by shearing a single metal material, and thus the first bracket member (120a) and the second bracket member (120b) having a symmetrical shape may be provided. As described below, the upper bracket (120) structure of the present embodiment, which is formed of two bracket members (120a, 120b), increases the eccentricity of the tension member (140) in the upper bracket (120), thereby generating a moment in the opposite direction to the bending stress generated in the soil retaining wall. In addition, the upper bracket (120) manufactured in a sharing manner does not include a separate welding part, so it can sufficiently withstand the generated moment.

[0038] In addition, the lower bracket (130) may be formed of a first bracket member (130a) and a second bracket member (130b) that face each other and are spaced apart from each other by a predetermined distance based on the web (102) at the lower portion of the first flange (104a). Here, the lower bracket (130) is manufactured by shearing a single metal material, similar to the upper bracket (120), and thus the first bracket member (130a) and the second bracket member (130b) having a symmetrical shape may be provided. As described below, the structure of the lower bracket (130) of the present embodiment, which is formed of two bracket members (130a, 130b), is advantageous in fixing and installing a plurality of tension members (140), and in particular, it has a more simplified structure than the conventional lower bracket while being able to accommodate a greater number of tension members (140).

[0039] As illustrated in Fig. 1, the upper bracket (120) is configured to protrude further in the vertical direction from the first flange (104a) compared to the lower bracket (130). This is to secure the eccentricity of the upper bracket (120) described above. If the lower bracket (130) is designed with the same configuration and shape as the upper bracket (120), the drilling diameter becomes larger, and accordingly, the drilling cost becomes very high. Therefore, it is necessary to make the configuration and shape of the upper bracket (120) and the lower bracket (130) different.

[0040] Hereinafter, the detailed configuration of the upper bracket (120) and the lower bracket (130) will be examined in more detail with reference to FIGS. 2 to 8.

[0041]

[0042] FIG. 2 is a side view of a thumb peg (100) and an upper bracket (120) according to one embodiment of the present invention, and FIG. 3 is a drawing for explaining an upper bracket (120) and a lower bracket (130) according to one embodiment of the present invention. In addition, FIG. 4 is a drawing showing a detailed configuration of an upper bracket (120) according to one embodiment of the present invention, and FIG. 5 is a drawing showing an upper bracket (120) according to one embodiment of the present invention as seen from above, and FIG. 6 is a drawing showing an upper bracket (120) according to one embodiment of the present invention as seen from below. In addition, FIG. 7 is a drawing showing a detailed configuration of a lower bracket (130) according to one embodiment of the present invention, and FIG. 8 is an example showing a separation prevention member (304b) of a lower bracket (130) according to one embodiment of the present invention, and FIG. 9 is an example showing a separation prevention member (304b) of a lower bracket (130) according to another embodiment of the present invention.

[0043] As described above, the upper bracket (120) may be composed of a first bracket member (120a) and a second bracket member (120b). The first bracket member (120a) and the second bracket member (120b) may be composed of a vertical plate (202), a horizontal plate (204), a hanging plate (206), and a fixing member (208).

[0044] A vertical plate (202) is formed to extend a predetermined length along the longitudinal direction of the beam member (110) from the front side of the first flange (104a). The vertical plate (202) may be formed in a square shape with a predetermined thickness and width.

[0045] The horizontal plate (204) is formed by being bent vertically from one end of the vertical plate (202).

[0046] The hanging plate (206) is formed on the rear side of the first flange (104a) by being bent vertically from one end of the horizontal plate (204).

[0047] These vertical plates (202), horizontal plates (204) and hanging plates (206) form a T-shaped structure, and the end of the first flange (104a) is inserted and fitted into the T-shaped structure formed in this manner.

[0048] Additionally, grooves (204a, 204b) may be formed on the other end edge of the horizontal plate (204) for a plurality of tension members (140) to penetrate. The grooves (204a, 204b) may be formed in a semicircular shape, for example.

[0049] Referring to FIGS. 3 to 6, the first groove (204a) of the first bracket member (120a) and the second groove (204b) of the second bracket member (120b) are positioned to face each other so as to form a hollow portion (P) of a predetermined size for a plurality of tension members (140) to penetrate between the inner surface of the first groove (204a) and the inner surface of the second groove (204b).

[0050] The anchoring member (208) is a member for anchoring a plurality of tension members (140), and is anchored on the upper portion of the horizontal plate (204) corresponding to the hollow portion (P). The anchoring member (208) has a shape corresponding to the hollow portion (P) and may have a cross-section larger than the hollow portion (P). The anchoring member (208) is anchored on the upper portion of the horizontal plate (204) while covering the hollow portion (P), and has a plurality of anchoring holes (208a) through which the plurality of tension members (140) pass and are anchored. The anchoring member (208) may have, for example, four anchoring holes (208a) spaced apart by a predetermined interval. Accordingly, the plurality of tension members (140) can sequentially pass through the hollow portion (P) and the anchoring holes (208a).

[0051] At this time, the other end of the horizontal plate (204) may be formed to protrude a predetermined length in a direction vertically away from the front surface of the first flange (104a), and may have a curvature of a shape (R) in which the protruding length from the front surface of the first flange (104a) to the other end of the horizontal plate (204) becomes smaller from the central portion of the first flange (104a) toward the outside of the first flange (104a). As illustrated in FIG. 5, the other end of the horizontal plate (204) may be formed in a curved shape (R). Here, the grooves (204a, 204b) may be formed at the edge of the other end of the horizontal plate (204) where the protruding length is the longest. That is, the grooves (204a, 204b) may be formed at a point on the upper surface of the horizontal plate (204) farthest from the front surface of the first flange (104a). As described above, since the plurality of tension members (140) penetrate the grooves (204a, 204b) and are fixed by the fixing member (208), the eccentricity in the upper bracket (120) can be maximized when the grooves (204a, 204b) are formed at the furthest point from the front surface of the first flange (104a). Accordingly, the plurality of tension members (140) are tensioned further from the front surface of the first flange (104a) at the position of the upper bracket (130) than at the position of the lower bracket (120), thereby generating a moment in the opposite direction to the bending stress generated in the retaining wall.

[0052] In addition, a reinforcing member (210) that vertically protrudes from the vertical plate (202) toward the other end of the horizontal plate (204) and supports the other end of the horizontal plate (204) may be provided at the lower end of the horizontal plate (204). At this time, the protrusion length by which the reinforcing member (210) vertically protrudes from the vertical plate (202) may become smaller as the reinforcing member (210) moves away from the horizontal plate (204).

[0053] In addition, the gap (d) between the first bracket member (120a) and the second bracket member (120b) may be formed to be equal to or greater than the thickness of the web (102) so that the first bracket member (120a) and the second bracket member (120b) do not interfere with the web (102) when they are fitted to the first flange (104a). Accordingly, in the process of fitting the first bracket member (120a) and the second bracket member (120b) to the first flange (104a), the web (102) and the gap (d) are positioned to correspond to each other, and accordingly, the first bracket member (120a) and the second bracket member (120b) do not interfere with each other with the web (102).

[0054] In addition, a bar-shaped connecting member (212) may be provided between the first bracket member (120a) and the second bracket member (120b) to mutually fix the first bracket member (120a) and the second bracket member (120b). The connecting member (212) may be formed to extend along the longitudinal direction of the beam member (110) as a means for connecting and fixing the first bracket member (120a) and the second bracket member (120b) to each other. This connecting member (212) further improves the strength and stability of the upper bracket (120) together with the reinforcing member (210) described above.

[0055] Next, the lower bracket (130) may be composed of a first bracket member (130a) and a second bracket member (130b). The first bracket member (130a) and the second bracket member (130b) may be composed of a vertical plate (302), a horizontal plate (304), and a hanging plate (306).

[0056] A vertical plate (302) is formed to extend a predetermined length along the longitudinal direction of the beam member (110) from the front side of the first flange (104a). The vertical plate (302) may be formed in a square shape with a predetermined thickness and width.

[0057] The horizontal plate (304) is formed by being bent vertically from one end of the vertical plate (302).

[0058] The hanging plate (306) is formed on the rear side of the first flange (104a) by being bent vertically from one end of the horizontal plate (304).

[0059] The vertical plate (302), the horizontal plate (304), and the hanging plate (306) form a T-shaped structure, and the end of the first flange (104a) is inserted and fitted into the T-shaped structure formed in this manner. At this time, the horizontal plate (304) does not have a separate groove, protrusion, or end having a curved surface structure, unlike the horizontal plate (204) of the upper bracket (120). Instead, a plurality of through holes (304a) for a plurality of tension members (140) to pass through may be formed in the horizontal plate (304) at a predetermined interval.

[0060] At this time, on the outside of the horizontal plate (304), a plurality of separation prevention members (304b) that support the plurality of tension members (140) so that the plurality of tension members (140) do not separate out of the lower bracket (130) may be provided in parallel with the plurality of tension members (140). The separation prevention members (304b) may be formed perpendicular to the horizontal plate (304) while being adjacent to the plurality of through holes (304a). As illustrated in FIGS. 7 and 8, a separation prevention member (304b) may be provided on each of both sides of the first bracket member (130a), and a separation prevention member (304b) may be provided on each of both sides of the second bracket member (130b). The tension member (140) may be arranged adjacent to the separation prevention member (304b) on the inside of the separation prevention member (304b). Here, the detachment prevention member (304b) may be formed, for example, in a cylindrical shape with a circular cross-section. However, the shape of the detachment prevention member (304b) is not limited thereto, and the detachment prevention member (304b) may also be formed in a bar shape with a square cross-section, as illustrated in FIG. 9.

[0061] In addition, the gap (d) between the first bracket member (130a) and the second bracket member (130b) may be formed to be equal to or greater than the thickness of the web (102) so that the first bracket member (130a) and the second bracket member (130b) do not interfere with the web (102) when fitted to the first flange (104a). Accordingly, in the process of fitting the first bracket member (130a) and the second bracket member (130b) to the first flange (104a), the web (102) and the gap (d) are positioned to correspond to each other, and accordingly, the first bracket member (130a) and the second bracket member (130b) do not interfere with each other with the web (102).

[0062] The gap (d) between the first bracket member (120a) and the second bracket member (120b) and the gap (d) between the first bracket member (130a) and the second bracket member (130b) are formed to be equal to or greater than the thickness of the web (102) during the manufacturing process through shearing of the upper bracket (120) and the lower bracket (130), and thus, there is no need to separately form an insertion groove on one side to prevent interference with the web (102). In addition, since both the upper bracket (120) and the lower bracket (130) are formed of two bracket members having a symmetrical structure, a greater number of tension members (140) can be fixedly installed, and thus, there is an advantage in that the tensile force can be further improved.

[0063]

[0064] FIG. 9 is a drawing showing an example of a thumb stake (100) installed according to one embodiment of the present invention.

[0065] Referring to Fig. 9, the construction method of a temporary earth retaining structure using a thumb pile (100) can be performed through the following steps.

[0066] 1. Steps for making a thumb stake (100)

[0067] As described above, the thumb peg (100) is manufactured by manufacturing the upper bracket (120) and the lower bracket (130) and then fitting them into the upper and lower parts of the first flange (104a), respectively.

[0068] 2. A step of tensioning multiple tension members (140) installed on a thumb stake (100) to a first size.

[0069] After installing a plurality of tension members (140) on the manufactured thumb pile (100), tension is applied to a first size. Here, the first size may be, for example, a size of 5 tons.

[0070] 3. Step of forming a perforation hole (H) by excavating the ground (G) to a specified diameter and depth.

[0071] Afterwards, a perforation hole (H) is formed by excavating the ground (G) to a predetermined diameter and depth.

[0072] 4. Step of inserting a thumb pile (100) with prestress introduced into the perforation hole (H)

[0073] Afterwards, a thumb pile (100) with prestress introduced is driven into the perforation hole (H). At this time, the thumb pile (100) is driven so that the first flange (104a) faces the back surface of the excavation.

[0074] 5. A step of tensioning multiple tension members (140) to a second size while the thumb pile (100) is restrained by water or soil.

[0075] The thumb pile (100) is restrained by compacting the excavated soil and filling the upper portion of the excavated soil with soil. Thereafter, a plurality of tension members (140) are tensioned to a second size using a hydraulic cylinder. Here, the second size is larger than the first size, and may be, for example, 50 tons.

[0076]

[0077] While the present invention has been described in detail above through representative examples, those skilled in the art will appreciate that various modifications to the above-described embodiments are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the claims set forth below but also by equivalents thereof.

Claims

1. A beam member (110) comprising a web (102), and a first flange (104a) and a second flange (104b) vertically connected to the web (102) on both sides of the web (102); An upper bracket (120) fitted to the first flange (104a) at the upper portion of the beam member (110); A lower bracket (130) fitted to the first flange (104a) while facing the upper bracket (120) at the lower portion of the beam member (110); and It includes a plurality of tension members (140) that extend along the length direction of the beam member (110) between the upper bracket (120) and the lower bracket (130) and are fixedly installed in the upper bracket (120) and the lower bracket (130), respectively. The upper bracket (120) is composed of a first bracket member (120a) and a second bracket member (120b) that face each other and are spaced apart from each other by a predetermined distance based on the web (102) at the upper portion of the first flange (104a). The first bracket member (120a) and the second bracket member (120b) are A vertical plate (202) formed to extend a predetermined length along the longitudinal direction of the beam member (110) from the front of the first flange (104a); A horizontal plate (204) formed by being vertically bent from one end of the vertical plate (202); and It is formed by a hanging plate (206) that is vertically bent from one end of the horizontal plate (204) and formed on the rear side of the first flange (104a). A first groove (204a) is formed on the other end edge of the horizontal plate (204) of the first bracket member (120a), A second groove (204b) is formed on the other end edge of the horizontal plate (204) of the second bracket member (120b), The first groove (204a) and the second groove (204b) are positioned so as to face each other, and a hollow portion (P) of a predetermined size is formed between the inner surface of the first groove (204a) and the inner surface of the second groove (204b) for the plurality of tension members (140) to penetrate through. A thumb stake having a bracket of a fitting type, in which a fixing member (208) for fixing the above plurality of tension members (140) is fixed to the upper portion of the horizontal plate (204) corresponding to the hollow portion (P).

2. In claim 1, A thumb stake having a bracket of a fitting type, wherein the other end of the horizontal plate (204) protrudes a predetermined length in a direction vertically away from the front surface of the first flange (104a), and the protruding length from the front surface of the first flange (104a) to the other end of the horizontal plate (204) has a curvature that becomes smaller as it goes from the central portion of the first flange (104a) to the outside of the first flange (104a).

3. In claim 2, The first groove (204a) and the second groove (204b) are thumb stakes having a fitting-type bracket formed on the other end edge of the horizontal plate (204) having the longest protruding length.

4. In claim 3, At the lower end of the other end of the horizontal plate (204), a reinforcing member (210) is provided that vertically protrudes from the vertical plate (202) to the other end of the horizontal plate (204) and supports the other end of the horizontal plate (204). A thumb stake having a bracket of a fitting type, in which the protruding length of the reinforcing member (210) protrudes vertically from the vertical plate (202) becomes smaller as the reinforcing member (210) moves away from the horizontal plate (204).

5. In claim 1, A thumb stake having a fitting-type bracket, wherein the gap (d) between the first bracket member (120a) and the second bracket member (120b) is formed to be equal to or greater than the thickness of the web (102) so that the first bracket member (120a) and the second bracket member (120b) do not interfere with the web (102) when fitted to the first flange (104a).

6. In claim 5, A thumb stake having a bracket of the insertion type, in which a bar-shaped connecting member (212) is provided between the first bracket member (120a) and the second bracket member (120b) to mutually fix the first bracket member (120a) and the second bracket member (120b).

7. In claim 1, The above fixing member (208) is a thumb stake having a bracket of the insertion type, which is fixed on the upper part of the horizontal plate (204) while covering the hollow portion (P) and has a plurality of fixing holes (208a) through which the plurality of tension members (140) pass and are fixed.

8. In claim 1, The above lower bracket (130) is composed of a first bracket member (130a) and a second bracket member (130b) that are spaced apart from each other by a predetermined distance with respect to the web (102) at the lower portion of the first flange (104a). The above first bracket member (130a) and the above second bracket member (130b) are, A vertical plate (302) formed to extend a predetermined length along the longitudinal direction of the beam member (110) from the front of the first flange (104a); A horizontal plate (304) formed by being vertically bent from one end of the vertical plate (302); and It is formed by a hanging plate (306) that is vertically bent from one end of the horizontal plate (304) and formed on the rear side of the first flange (104a). A thumb stake having a bracket of a fitting type, in which a plurality of through holes (304a) for the plurality of tension members (140) to pass through are formed at a predetermined interval in the horizontal plate (304).

9. In claim 8, On the outside of the horizontal plate (304), a plurality of anti-separation members (304b) are provided in parallel with the plurality of tension members (140) to support the plurality of tension members (140) so that the plurality of tension members (140) do not come off to the outside of the lower bracket (130). The above-mentioned plurality of anti-separation members (304b) are thumb stakes having a bracket of a fitting type formed vertically with the horizontal plate (304) while being adjacent to the above-mentioned plurality of through holes (304a).

10. A method for constructing a temporary earth retaining structure using a thumb pile (100) described in any one of claims 1 to 9, Step of manufacturing the above thumb stake (100); A step of tensioning a plurality of tension members (140) installed on the above thumb stake (100) to a first size; A step of forming a perforation hole (H) by excavating the ground (G) to a predetermined diameter and depth; A step of inserting the thumb pile (100) into which prestress is introduced into the above perforation hole (H); and A method for constructing a temporary earth retaining structure, comprising a step of tensioning the plurality of tension members (140) to a second size larger than the first size while the thumb piles (100) are restrained by water compaction or soil.

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