Tea structure for suppressing top displacement and two-row self-supporting temporary earth retaining structure having excavated lower ground manual resistor block

Abstract

Provided are a TEA structure for suppressing top displacement and a two-row self-supporting temporary earth retaining structure having an excavated lower ground manual resistor block. According to embodiments of the present invention, by using piles (10, 50) in a two-row structure, wale members (20, 60, 90), and guide brackets (40, 70, 110) having improved shapes, a tension force due to tensile materials (30, 100) is directly applied to a rear wale member (20) and front wale members (60, 90), and accordingly, the support force of the wale members (20, 60, 90) is improved due to the earth pressure of backfill soil and stability of a two-row self-supporting temporary earth retaining structure (1) can be improved. In addition, as the front-row piles (50) are arranged to be spaced apart a certain distance from the rear-row piles (10), a gravity-type retaining wall is formed between the front-row piles (50) and the rear-row piles (10), and the gravity-type retaining wall may further improve the stability of the two-row self-supporting temporary earth retaining structure(1) while supporting the earth pressure of the backfill soil between the front-row piles (50) and the rear-row piles (10).

Description

Two-row self-supporting earth retaining wall structure with upper displacement restraining TEA structure and excavated lower ground passive resistance block body

[0001] The present invention relates to a two-row self-supporting earth retaining wall structure having an upper displacement restraining TEA structure and an excavation sub-soil passive resistance block body, and more specifically, to a technology for increasing the excavation self-supporting height and improving the stability of a self-supporting earth retaining temporary structure in soft ground.

[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] Various methods such as earth anchors and CIP are used as earth retaining methods for constructing these temporary earth retaining facilities. However, conventional earth retaining methods have problems such as it is difficult to effectively apply tensile force to the pile, or the construction of a complex structure and excessive construction cost are involved in directly applying tensile force to the pile. Therefore, self-supporting earth retaining methods that can support earth pressure, water pressure, etc. with the pile itself are widely used. In the case of self-supporting earth retaining methods, it is very important to increase the excavation height and ensure the stability of the earth retaining wall, especially in soft ground such as sedimentary layers, alluvium, and landfill layers.

[0004] The present invention is to improve the bearing capacity of a belt member due to the earth pressure of the backing soil, and thereby to improve the stability of a two-row self-supporting earth retaining wall temporary structure.

[0005] According to an exemplary embodiment, a plurality of rear-row piles (10) are installed vertically with respect to the ground while being spaced apart from the rear-row soil at a predetermined interval; a rear-row belt member (20) is formed adjacent to the plurality of rear-row piles (10) in a direction perpendicular to the plurality of rear-row piles (10) on top of the ground excavated in the first stage after the first stage of excavation is completed on the opposite side of the rear-row soil; a first guide bracket (40) is coupled to the rear-row belt member (20) and changes the wiring direction of the plurality of first tension members (30) into a direction perpendicular to the longitudinal direction of the rear-row piles (10) to guide the first tension members (30) to penetrate the rear-row belt member (20); a plurality of front-row piles (50) are installed vertically with respect to the ground excavated in the first stage while being spaced apart from the plurality of rear-row piles (10) at a predetermined interval; A first heating belt member (60) formed adjacent to the plurality of heating piles (50) in a direction perpendicular to the plurality of heating piles (50) on the upper part of the excavated ground of the first stage; And a second guide bracket (70) coupled to the first heat-conducting belt member (60) to guide the plurality of first tension members (30) to penetrate the first heat-conducting belt member (60) and to fix the first tension members (30) that have penetrated the first heat-conducting belt member (60), wherein one end of the plurality of first tension members (30) protrudes toward the front of the second guide bracket (70) after penetrating the second guide bracket (70) and the other end is fixed to the lower part of the ground, and a two-row self-supporting temporary soil retaining structure is provided in which one end of the first tension member (30) is tensioned while the other end of the first tension member (30) is fixed to the lower part of the ground.

[0006] Between the rear row belt member (20) and the first heat transfer belt member (60), a gap maintaining member (80) is formed to support the rear row belt member (20) and the first heat transfer belt member (60), respectively, and maintain a gap between the rear row belt member (20) and the first heat transfer belt member (60). The gap maintaining member (80) is formed in an H-beam shape composed of a plurality of flanges (81) and webs (82), and the plurality of first tension members (30) are routed along the longitudinal direction of the web (82) while being secured to the upper surface of the web (82) so as to penetrate the first heat transfer belt member (60).

[0007] The above-described two-row self-supporting retaining wall temporary structure may further include: a second heat insulating belt member (90) formed adjacent to the plurality of heat insulating piles (50) in a direction perpendicular to the plurality of heat insulating piles (50) on top of the second-stage excavated ground after a second-stage excavation is completed at a depth deeper than the first-stage excavated ground below the first heat insulating belt member (60) while one end of the first tension member (30) is tensioned; and a third guide bracket (110) coupled to the second heat insulating belt member (90) to change the wiring direction of the plurality of second tension members (100) to a direction perpendicular to the longitudinal direction of the heat insulating piles (50) and guide the second tension member (100) to pass through the second heat insulating belt member (90).

[0008] The plurality of second tension members (100) have one end protruding through the second heat-conducting belt member (90) and the other end fixed to the lower part of the ground excavated in the first stage, and one end of the second tension member (100) can be tensioned while the other end of the second tension member (100) is fixed to the lower part of the ground excavated in the first stage.

[0009] The second heat transfer belt member (90) and the third guide bracket (110) may be formed on the upper portion of the N-stage excavated ground each time the N-stage excavation is completed at a depth deeper than the second-stage excavated ground below the second heat transfer belt member (90).

[0010] The other end of the first tension member (30) and the other end of the second tension member (100) can be fixed by grouting inside the SCW (Soil Cement Wall) wall.

[0011] The other end of the first tensile member (30) and the other end of the second tensile member (100) can be fixed by the first ground anchor (202) and the second ground anchor (204), respectively.

[0012] The rear-row belt member (20) is composed of an upper belt member (22); and a lower belt member (24) arranged at a predetermined distance from the upper belt member (22) below the upper belt member (22), and the first guide bracket (40) is formed at a predetermined distance between the upper belt member (22) and the lower belt member (24) to support the upper belt member (22) and the lower belt member (24), respectively; a first vertical plate (42) arranged perpendicular to the pair of side plates (41) and having a rotating plate (43) protrudingly formed on one surface thereof to change the wiring direction of the first tension member (30) to a direction perpendicular to the longitudinal direction of the rear-row pile (10); And it may include a second vertical plate (44) arranged parallel to the first vertical plate (42) to guide the first tension member (30) toward the first heat-conducting belt member (60).

[0013] On both sides of the side plate (41), a protrusion (45) is formed to protrude to maintain a gap between the upper belt member (22) and the lower belt member (24), and a pair of grooves (45a) may be formed on the upper and lower surfaces of the protrusion (45) to allow the upper belt member (22) and the lower belt member (24) to be respectively seated.

[0014] A plurality of holes (46) for the first tension member (30) to pass through may be formed on one surface of the first vertical plate (42) and the second vertical plate (44).

[0015] At the lower part of the above-mentioned heating pile (50), a passive resistance block (300) for supporting the heating pile (50) adjacent to the above-mentioned heating pile (50) can be grouted and fixed.

[0016] According to another exemplary embodiment, a method for constructing the above-described two-row self-supporting earth retaining wall temporary structure comprises the steps of: installing a plurality of rear-row piles (10); installing the rear-row belt member (20) and the first guide bracket (40) after a first-stage excavation of a predetermined depth is completed on the opposite side of the back soil; installing the plurality of front-row piles (50); installing the front-row belt member (60) and the second guide bracket (70); installing the spacing member (80); wiring and then fixing the plurality of first tension members (30); tensioning the plurality of first tension members (30); A method for constructing a two-row self-supporting earth retaining wall temporary structure is provided, including: a step of installing the second heat insulating belt member (90) and the third guide bracket (110) after completing a second stage of excavation deeper than the first stage of ground excavated below the first heat insulating belt member (60); a step of wiring and then fixing the plurality of second tension members (100); a step of tensioning the plurality of second tension members (100); and a step of performing an N-stage excavation deeper than the second stage of ground excavated below the second heat insulating belt member (90).

[0017] According to embodiments of the present invention, by directly applying tension to the rear-row belt member (20) and the front-row belt member (60, 90) by using a two-row pile (10, 50), a belt member (20, 60, 90) and an improved type of guide bracket (40, 70, 110), the bearing capacity of the belt member (20, 60, 90) due to the earth pressure of the back soil is improved, and thus the stability of the two-row self-supporting earth retaining temporary facility (1) can be improved. In addition, as the front row piles (50) are arranged to be spaced apart from the rear row piles (10) by a predetermined distance, a gravity retaining wall is formed between the front row piles (50) and the rear row piles (10), and this gravity retaining wall can further improve the stability of the two-row self-supporting earth retaining temporary facility (1) while supporting the back soil pressure between the front row piles (50) and the rear row piles (10).

[0018] In particular, by using the first guide bracket (40) and the third guide bracket (110) having improved structure and shape to more stably support the upper belt member (22) and the lower belt member (24), while providing a gap for the tension members (30, 100) to penetrate, and guiding the wiring direction of the tension members (30, 100), the stability of the two-row self-supporting temporary earth retaining structure (1) can be further improved. The stability-improving effect of the two-row self-supporting temporary earth retaining structure (1) is more noticeable in soft ground such as sedimentary layers, alluvial layers, and landfill layers.

[0019] Figure 1 is a side view of a two-row self-supporting soil retaining structure according to one embodiment of the present invention.

[0020] Figure 2 is a plan view of a two-row self-supporting earth retaining wall temporary structure according to one embodiment of the present invention.

[0021] FIG. 3 is a drawing for explaining the installation structure of the rear-row pile, the rear-row belt member, and the first guide bracket according to embodiments of the present invention.

[0022] Figure 4 is a perspective view of a first guide bracket according to embodiments of the present invention.

[0023] Figure 5 is an exploded view of a first guide bracket according to embodiments of the present invention.

[0024] Figure 6 is a side view of a first guide bracket according to embodiments of the present invention.

[0025] Figure 7 is a front view of a first guide bracket according to embodiments of the present invention.

[0026] Figure 8 is a rear view of the first guide bracket according to embodiments of the present invention.

[0027] Figure 9 is a front view of a second guide bracket according to embodiments of the present invention.

[0028] Figure 10 is an example showing a state in which a first tensile member according to embodiments of the present invention penetrates a second guide bracket.

[0029] Figure 11 is a drawing for explaining a gap maintaining unit according to embodiments of the present invention.

[0030] Figure 12 is a front view of a third guide bracket according to embodiments of the present invention.

[0031] Figure 13 is a side view of a two-row self-supporting earth retaining wall temporary structure according to another embodiment of the present invention.

[0032] Figure 14 is a plan view of a two-row self-supporting earth retaining wall temporary structure according to another embodiment of the present invention.

[0033] FIG. 15 is a drawing showing an example of a grouting of a manual resistance block according to embodiments of the present invention.

[0034] Figure 16 is a flow chart for explaining a method for constructing a two-row self-supporting soil retaining wall temporary structure according to embodiments of the present invention.

[0035] 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.

[0036] 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.

[0037]

[0038] Fig. 1 is a side view of a two-row self-supporting temporary earth retaining structure (1) according to one embodiment of the present invention, and Fig. 2 is a plan view of a two-row self-supporting temporary earth retaining structure (1) according to one embodiment of the present invention. In addition, Fig. 3 is a drawing for explaining the installation structure of a rear-row pile (10), a rear-row belt member (20), and a first guide bracket (40) according to embodiments of the present invention.

[0039] As illustrated in FIGS. 1 and 2, a two-row self-supporting retaining wall temporary structure (1) according to one embodiment of the present invention is a structure installed to prevent back soil from flowing into the excavated soil side at a construction site, and includes a back-row pile (10), a back-row belt member (20), a first tension member (30), a first guide bracket (40), a front-row pile (50), a first front-row belt member (60), a second guide bracket (70), a spacing member (80), a second front-row belt member (90), a second tension member (100), and a third guide bracket (110). In the present embodiments, the excavated soil refers to soil excavated by an excavator for underground construction at a construction site, and the back-row soil refers to soil located on the back side of the excavated soil and supported by the two-row self-supporting retaining wall temporary structure (1).

[0040] The rear row pile (10) is installed vertically to the ground while being adjacent to the backing soil. The rear row pile (10) is formed in an H-beam shape and includes a plurality of flanges and a web. Here, one of the plurality of flanges (the first flange) may be arranged to face the backing soil side, and the other flanges (the second flange) may be arranged to face the excavated soil side. In addition, the rear row piles (10) may be installed in plurality so as to be spaced apart from each other at a predetermined interval. Specifically, after the ground is perforated to a predetermined size, the rear row piles (10) may be installed at a predetermined interval within the perforation. As described below, concrete may be injected into the interior of the perforation, and accordingly, the rear row piles (10) may form a retaining wall (i.e., an SCW wall) as a stress agent.

[0041] The rear row belt member (20) is formed adjacent to the plurality of rear row piles (10) in a direction perpendicular to the plurality of rear row piles (10) on top of the first-stage excavated ground after the first-stage excavation is completed on the opposite side of the backing soil. Specifically, after the rear row piles (10) are installed, the first-stage excavation can be performed by an excavator on the opposite side of the backing soil, that is, on the second flange side of the rear row piles (10). Thereafter, the rear row belt member (20) can be installed perpendicular to the plurality of rear row piles (10) on top of the first-stage excavated ground (that is, above the first-stage excavated ground).

[0042] As illustrated in Fig. 3, the rear belt member (20) may be composed of an upper belt member (22) and a lower belt member (24). At this time, the upper belt member (22) and the lower belt member (24) are each formed in an H-beam shape and include a plurality of flanges and webs. The lower belt member (24) may be arranged at a predetermined distance from the upper belt member (22) below the upper belt member (22).

[0043] The first guide bracket (40) is coupled to the rear row belt member (20) and changes the wiring direction of the plurality of first tension members (30) to a direction perpendicular to the longitudinal direction of the rear row pile (10) to guide the first tension members (30) to penetrate the rear row belt member (20).

[0044] As illustrated in FIGS. 1 to 3, the first tension member (30) is routed along the longitudinal direction of the rear-row pile (10), and the routing direction can be changed to a direction perpendicular to the longitudinal direction of the rear-row pile (10) as it passes through the first guide bracket (40). At this time, a plurality of first tension members (30) can be provided, and thus the tension force by the first tension member (30) can be maximized. The detailed configuration of the first guide bracket (40) will be described in detail later with reference to FIGS. 4 to 8.

[0045] A plurality of heat transfer piles (50) are installed vertically with respect to the ground excavated in the first stage, spaced apart from a plurality of rear-row piles (10) at a predetermined interval. The heat transfer piles (50) are formed in an H-beam shape and include a plurality of flanges and webs. Here, one of the plurality of flanges (the first flange) may be arranged to face the rear-row pile (10) side, and the other flanges (the second flanges) may be arranged to face the excavated soil side. In addition, a plurality of heat transfer piles (50) may be installed so as to be spaced apart from each other at a predetermined interval. Specifically, after the ground is perforated to a predetermined size, heat transfer piles (50) may be installed at a predetermined interval within the perforation. As described below, concrete may be injected into the perforation, and accordingly, the heat transfer piles (50) may form a retaining wall (i.e., an SCW wall) as a stress agent.

[0046] Referring to Fig. 2, the pre-heat piles (50) do not need to be arranged parallel to the post-heat piles (10) on the same line. In addition, the spacing between a plurality of pre-heat piles (50) may be smaller than the spacing between a plurality of post-heat piles (10). That is, each pre-heat pile (50) may be arranged to be spaced apart from an adjacent post-heat pile (10) by a predetermined distance, but may be arranged to be staggered at an angle to each other.

[0047] In addition, referring to Fig. 1, since the front row piles (50) are arranged to be spaced apart from the rear row piles (10) by a predetermined distance, a gravity retaining wall is formed between the front row piles (50) and the rear row piles (10). This gravity retaining wall supports the back earth pressure between the front row piles (50) and the rear row piles (10), and thus the stability of the two-row self-supporting soil retaining temporary facility (1) can be further improved.

[0048] The first heat-conducting belt member (60) is formed adjacent to the plurality of heat-conducting piles (50) in a direction perpendicular to the plurality of heat-conducting piles (50) on the upper part of the first-stage excavated ground. Specifically, after the heat-conducting piles (50) are installed, the first heat-conducting belt member (60) can be installed perpendicular to the plurality of heat-conducting piles (50) on the upper part of the first-stage excavated ground (i.e., above the first-stage excavated ground) on the opposite side of the backing soil, that is, on the second flange side of the heat-conducting piles (50).

[0049] The first pre-heat belt member (60) is formed in an H-beam shape like the rear-heat belt member (20) and includes a plurality of flanges and webs. That is, the first pre-heat belt member (60) can be formed in the same shape as the rear-heat belt member (20). The first pre-heat belt member (60) can be installed parallel to the rear-heat belt member (20) at the same height as the rear-heat belt member (20). The first pre-heat belt member (60) includes a first flange on the back soil side and a second flange on the excavated soil side, and the first flange of the first pre-heat belt member (60) can be arranged to face the flange on the excavated soil side of the rear-heat belt member (20).

[0050] The second guide bracket (70) is coupled to the first heat-conducting belt member (60) to guide a plurality of first tension members (30) to penetrate the first heat-conducting belt member (60) and to fix the first tension members (30) that penetrate the first heat-conducting belt member (60).

[0051] As illustrated in FIGS. 1 and 2, the second guide bracket (70) may be formed into a plate shape of a predetermined size and may be coupled to the first heat-conducting belt member (60). As described below, the second guide bracket (70) may be provided with a plurality of holes for the first tension member (30) to pass through, and the first tension member (30) may pass through the first heat-conducting belt member (60) and then pass through the second guide bracket (70) through the holes. In addition, a fixing member for fixing the first tension member (30) may be provided in the hole of the second guide bracket (70).

[0052] The gap maintaining member (80) is arranged to support the rear row belt member (20) and the first heat transfer belt member (60) between the rear row belt member (20) and the first heat transfer belt member (60), respectively, thereby maintaining the gap between the rear row belt member (20) and the first heat transfer belt member (60). As described below, the gap maintaining member (80) is formed in an H-beam shape, and a first tension member (30) can be installed and routed on the upper surface of the web of the gap maintaining member (80). The first tension member (30) can be installed along the longitudinal direction of the web and penetrate the first heat transfer belt member (60) while being installed on the upper surface of the web.

[0053] A plurality of first tension members (30) wired in this way can have one end penetrate the second guide bracket (70) and then protrude to the front of the second guide bracket (70), and the other end can be fixed to the lower part of the ground. At this time, the other end of the first tension member (30) is placed at the lower part of the perforation in which the aforementioned rear pile (10) is installed, and can be fixed as concrete is injected into the interior of the perforation. That is, the other end of the first tension member (30) can be fixed as an integral part of the soil retaining wall in the process in which the rear pile (10) forms the soil retaining wall as a stress agent. This fixing method will be referred to as the SCW (Soil Cement Wall) rear-row fixing method.

[0054] One end of the first tension member (30) can be tensioned by a hydraulic device (not shown) while the other end of the first tension member (30) is fixed. (P1 in Fig. 1)

[0055] The second heat transfer belt member (90) is formed adjacent to the plurality of heat transfer piles (50) in a direction perpendicular to the plurality of heat transfer piles (50) on top of the second-stage excavated ground after the second-stage excavation is completed at a depth deeper than the first-stage excavated ground below the first heat transfer belt member (60) while one end of the first tension member (30) is tensioned. Specifically, after one end of the first tension member (30) is tensioned, the second-stage excavation can be performed by an excavator below the first heat transfer belt member (60). When the second-stage excavation is completed, the second heat transfer belt member (90) can be installed in a direction perpendicular to the plurality of heat transfer piles (50) on top of the second-stage excavated ground. The second row belt member (90) has the same structure and shape as the rear row belt member (20) described above.

[0056] The third guide bracket (110) is coupled to the second heat-conducting belt member (90) to change the wiring direction of the plurality of second tension members (100) to a direction perpendicular to the longitudinal direction of the heat-conducting stake (50) so as to guide the second tension members (100) to penetrate the second heat-conducting belt member (90).

[0057] As illustrated in FIGS. 1 and 2, the second tension member (100) is wired along the longitudinal direction of the heating pile (50), and the wiring direction can be changed to a direction perpendicular to the longitudinal direction of the heating pile (50) while passing through the third guide bracket (100). At this time, a plurality of second tension members (100) can be provided, and thus the tension force by the second tension member (100) can be maximized. The third guide bracket (110) has the same structure and shape as the first guide bracket (40) described above. That is, the second heating belt member (90) and the third guide bracket (110) are configured identically to the rear heating belt member (20) and the first guide bracket (40) described above, respectively, and the second tension member (100) can also be formed in the same wiring direction as the first tension member (30).

[0058] In this way, the second tension member (100) can have one end pass through the third guide bracket (110) and the second heat-insulating belt member (90) and then protrude to the front of the third guide bracket (110), and the other end can be fixed to the lower part of the ground where the first stage is excavated. At this time, the other end of the second tension member (100) is placed at the lower part of the perforation in which the heat-insulating pile (50) is installed, and can be fixed as concrete is injected into the interior of the perforation. That is, the other end of the second tension member (100) can be fixed as an integral part of the earth retaining wall in the process of forming the earth retaining wall with the heat-insulating pile (50) as a stress agent. The other end of the second tension member (100) is fixed in the same manner as the other end of the first tension member (30), and this fixing method will be referred to as the SCW heat-insulating fixing method. The other end of the first tension member (30) and the other end of the second tension member (100) can be fixed by grouting inside the SCW wall (i.e., the earth retaining wall).

[0059] Thereafter, N-stage excavation (N>2) deeper than the 2-stage excavated ground can be performed below the second heat transfer belt member (90) (e.g., 3-stage excavation, 4-stage excavation, etc.), and each time the N-stage excavation is completed, the second heat transfer belt member (90) and the third guide bracket (110) can be installed on top of the N-stage excavated ground in the same manner as described above. That is, the second heat transfer belt member (90) and the third guide bracket (110) can be repeatedly installed along the longitudinal direction of the second heat transfer belt member (90) each time the N-stage excavation is completed, and the second tension member (100) can also be wired and tensioned through each of the second heat transfer belt members (90) and the third guide bracket (110). This N-stage excavation can be performed until the excavation depth reaches the target depth.

[0060]

[0061] FIGS. 4 to 8 are drawings for explaining the detailed configuration of a first guide bracket (40) according to embodiments of the present invention. Specifically, FIG. 4 is a perspective view of a first guide bracket (40) according to embodiments of the present invention, FIG. 5 is an exploded view of a first guide bracket (40) according to embodiments of the present invention, FIG. 6 is a side view of a first guide bracket (40) according to embodiments of the present invention, FIG. 7 is a front view of a first guide bracket (40) according to embodiments of the present invention, and FIG. 8 is a rear view of a first guide bracket (40) according to embodiments of the present invention.

[0062] Referring to FIGS. 4 to 8, the first guide bracket (40) includes a side plate (41), a first vertical plate (42), a rotating plate (43), and a second vertical plate (44).

[0063] As described above, the rear belt member (20) may be composed of an upper belt member (22) and a lower belt member (24).

[0064] The side plates (41) are formed with a predetermined interval between the upper belt member (22) and the lower belt member (24) to support the upper belt member (22) and the lower belt member (24), respectively. The side plates (41) may be formed as a pair to form both sides of the first guide bracket (40). Each side plate (41) may be formed with a predetermined interval between the upper belt member (22) and the lower belt member (24), respectively, to support the upper belt member (22) and the lower belt member (24).

[0065] At this time, a protrusion (45) may be formed on both sides of the side plate (41) to maintain a gap between the upper belt member (22) and the lower belt member (24). In addition, a pair of grooves (45a) may be formed on the upper and lower surfaces of the protrusion (45) to allow the upper belt member (22) and the lower belt member (24) to be respectively seated therein. The flange of the upper belt member (22) and the flange of the lower belt member (24) are seated in the grooves (45a) provided on the upper and lower surfaces of the protrusion (45), thereby stably supporting the upper belt member (22) and the lower belt member (24), and at the same time, a gap for the penetration of the first tension member (30) can be formed between the upper belt member (22) and the lower belt member (24).

[0066] The first vertical plate (42) is arranged perpendicularly to a pair of side plates (41), and a rotary plate (43) is formed protrudingly on one surface thereof to change the wiring direction of the first tension member (30) to a direction perpendicular to the longitudinal direction of the rear pile (10). The first vertical plate (42) is arranged adjacent to a pair of side plates (41), and a rotary plate (43) may be formed protrudingly on one surface thereof. The rotary plate (43) is formed in a curved shape and protrudes, so that when the first tension member (30) comes into contact with the rotary plate (43), the wiring direction of the first tension member (30) may be changed due to the curved shape of the rotary plate (43). A separation prevention member (43a) may be provided on both surfaces of the rotary plate (43) to prevent the first tension member (30) from being separated from the outside of the rotary plate (43). The detachment prevention part (43a) can be formed to protrude in a direction perpendicular to the first vertical plate (42) on both sides of the rotating plate (43).

[0067] In addition, a plurality of holes (46) and grooves (47) for the first tension member (30) to pass through may be formed on one surface of the first vertical plate (42). The first tension member (30) may be wired so that its wiring direction changes as it passes through the rotary plate (43) and passes through the rear belt member (20) while passing through the holes (46) or while being seated in the grooves (47).

[0068] The second vertical plate (44) is arranged parallel to the first vertical plate (42) to guide the first tension member (30) toward the first heat-conducting belt member (60). The second vertical plate (44) is arranged adjacent to a pair of side plates (41) and may be arranged parallel to the first vertical plate (42). A plurality of holes (46) for the first tension member (30) to pass through may be formed on one surface of the second vertical plate (44). The holes (46) formed on one surface of the second vertical plate (44) may be formed at positions corresponding to the holes (46) and grooves (47) of the first vertical plate (42). At this time, an auxiliary plate (44a) may be attached to the other surface of the second vertical plate (44). The auxiliary plate (44a) is attached to the other surface of the second vertical plate (44) and can stably support the tension applied to the first guide bracket (40) by the first tension member (30). A plurality of holes (46) are formed in the auxiliary plate (44a), and the holes (46) of the auxiliary plate (44a) can be formed at positions corresponding to the holes (46) of the second vertical plate (44).

[0069] In this way, the first tension member (30) is routed along the longitudinal direction of the rear-row pile (10), and when it comes into contact with the rotary plate (43), the routing direction is changed to a direction perpendicular to the longitudinal direction of the rear-row pile (10), and the routing direction is guided by the holes (46) and grooves (47) of the first vertical plate (42) and the second vertical plate (44) so ​​that it can penetrate the rear-row belt member (20). As described above, after penetrating the rear-row belt member (20), the first tension member (30) is routed along the longitudinal direction of the web while being seated on the upper surface of the web of the gap maintaining member (80) so that it can sequentially penetrate the first pre-heat belt member (60) and the second guide bracket (70).

[0070]

[0071] FIG. 9 is a front view of a second guide bracket (70) according to embodiments of the present invention, and FIG. 10 is an example showing a state in which a first tension member (30) according to embodiments of the present invention penetrates the second guide bracket (70).

[0072] As shown in FIGS. 9 and 10, a plurality of holes (72) for penetration of the first tension member (30) may be formed in the second guide bracket (70).

[0073] As described above, the second guide bracket (70) is formed in a plate shape of a predetermined size and is coupled to the first heat-conducting belt member (60), and the first tension member (30) can pass through the first heat-conducting belt member (60) and the second guide bracket (70) through the hole (72). In addition, a fixing member (74) for fixing the first tension member (30) can be provided in the hole of the second guide bracket (70).

[0074]

[0075] Fig. 11 is a drawing for explaining a gap maintaining member (80) according to embodiments of the present invention. As described above, the gap maintaining member (80) is arranged to support the rear row belt member (20) and the first heat transfer belt member (60) between the rear row belt member (20) and the first heat transfer belt member (60), respectively, thereby maintaining a gap between the rear row belt member (20) and the first heat transfer belt member (60).

[0076] Referring to Fig. 11, the spacing member (80) may be formed in an H-beam shape composed of a plurality of flanges (81) and webs (82). As described above, the first tension member (30) may be routed along the longitudinal direction of the web (82) while being secured to the upper surface of the web (82) to sequentially penetrate the first heat-conducting belt member (60) and the second guide bracket (70).

[0077]

[0078] Fig. 12 is a front view of a third guide bracket (110) according to embodiments of the present invention. As described above, the third guide bracket (110) has the same structure and shape as the first guide bracket (40). Accordingly, the third guide bracket (110) includes a side plate (41), a first vertical plate (42), a rotating plate (43), and a second vertical plate (44), the detailed configurations of which have been described in detail above, and thus a detailed description thereof will be omitted here.

[0079] As with the first tension member (30) described above, the second tension member (100) is wired along the longitudinal direction of the heating pile (50), and when it comes into contact with the rotary plate (43), the wiring direction is changed to a direction perpendicular to the longitudinal direction of the heating pile (50), and the wiring direction is guided by the holes (46) and grooves (47) of the first vertical plate (42) and the second vertical plate (44) so ​​that it can penetrate the second heating belt member (90).

[0080] In this way, the second tension member (100) can be fixed to the lower part of the ground where the first stage was excavated after one end passes through the third guide bracket (110) and the second heat-conducting belt member (90) and then protrudes to the front of the third guide bracket (110). At this time, the other end of the second tension member (100) can be fixed by grouting using the SCW heat-conducting fixing method described above.

[0081]

[0082] Fig. 13 is a side view of a two-row self-supporting temporary earth retaining structure (1) according to another embodiment of the present invention, and Fig. 14 is a plan view of a two-row self-supporting temporary earth retaining structure (1) according to another embodiment of the present invention.

[0083] In the case of the two-row self-supporting soil retaining structure (1) according to another embodiment of the present invention illustrated in FIGS. 13 and 14, the only difference from the previous embodiment is the method in which the other end of the first tension member (30) and the other end of the second tension member (100) are fixed, and the remaining configurations are the same as the previous embodiment.

[0084] In the case of the two-row self-supporting soil retaining structure (1) according to another embodiment of the present invention illustrated in FIGS. 13 and 14, the other end of the first tension member (30) and the other end of the second tension member (100) can be fixed by the first ground anchor (202) and the second ground anchor (204), respectively.

[0085] The first ground anchor (202) and the second ground anchor (204) are devices that provide tension to the rear-row pile (10) and the front-row pile (50) so that the rear-row pile (10) and the front-row pile (50) can resist the earth pressure of the back soil. An anchor is provided at the ends of the first ground anchor (202) and the second ground anchor (204), and the anchor is anchored obliquely while forming a predetermined angle with respect to the rear-row pile (10) and the front-row pile (50). Accordingly, it can be confirmed in FIGS. 13 and 14 that the first tension member (30) and the second tension member (100) are not routed parallel to the longitudinal direction of the rear-row pile (10) and the front-row pile (50), but are routed obliquely while forming a predetermined angle with respect to the rear-row pile (10) and the front-row pile (50).

[0086]

[0087] FIG. 15 is a drawing showing an example of a grouting of a manual resistance block (300) according to embodiments of the present invention.

[0088] Referring to Fig. 15, a passive resistance block (300) for supporting the heating pile (50) can be grouted and fixed adjacent to the heating pile (50) at the lower part of the heating pile (50).

[0089] The passive resistance block (300) can be grouted so as to be adjacent to the heat transfer pile (50) at the bottom of the heat transfer pile (50) (i.e., the bottom of the N-stage excavated ground) using, for example, the UCI (Underground Cutting Injection) method, the JSP (Jumbo Special Pile) method, etc. Accordingly, the heat transfer pile (50) can be supported at the bottom by the passive resistance block (300), and its stability can be further reinforced. The passive resistance block (300) can be formed as a block having, for example, a thickness of about 3 m or so and a width of about 5 m or so, but the size, shape, etc. of the passive resistance block (300) are not particularly limited.

[0090]

[0091] Fig. 16 is a flowchart illustrating a method for constructing a two-row self-supporting earth retaining structure (1) according to embodiments of the present invention. In the illustrated flowchart, the method is described by dividing it into a plurality of steps, but at least some of the steps may be performed in a different order, combined with other steps and performed together, omitted, divided into sub-steps, or performed with one or more steps not illustrated added.

[0092] In step S102, a plurality of rear piles (10) are installed.

[0093] At step S104, a first stage excavation of a predetermined depth is performed on the opposite side of the backsoil.

[0094] In step S106, the rear belt member (20) and the first guide bracket (40) are installed.

[0095] At step S108, a plurality of heating piles (50) are installed.

[0096] At step S110, the heat transfer belt member (60) and the second guide bracket (70) are installed.

[0097] In step S112, a gap maintenance member (80) is installed between the rear row belt member (20) and the first front row belt member (60).

[0098] In step S114, a plurality of first tension members (30) are wired and then fixed.

[0099] In step S116, a plurality of first tension members (30) are tensioned.

[0100] At step S118, a second stage of excavation is performed at a depth deeper than the first stage of excavation below the first heat-conducting belt member (60).

[0101] At step S120, the second heat-conducting belt member (90) and the third guide bracket (110) are installed.

[0102] In step S122, a plurality of second tension members (100) are wired and then fixed.

[0103] In step S124, a plurality of second tension members (100) are tensioned.

[0104] In step S126, N-stage excavation (e.g., 3-stage excavation) is performed at a depth deeper than the 2-stage excavated ground below the second heat-conducting belt member (90). Thereafter, steps S120 to S124 are repeatedly performed until the excavation depth reaches the target depth.

[0105]

[0106] 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.

[0107] [Explanation of symbols]

[0108] 1: 2-row self-supporting earth retaining wall temporary structure

[0109] 10: Rear pile

[0110] 20: Rear belt member

[0111] 22: Upper belt member

[0112] 24: Lower belt member

[0113] 30: First tensile member

[0114] 40: 1st guide bracket

[0115] 41: Side plate

[0116] 42: First vertical plate

[0117] 43: Turntable

[0118] 43a: Anti-separation section

[0119] 44: Second vertical plate

[0120] 44a: Auxiliary plate

[0121] 45: Protrusion

[0122] 45a: Home

[0123] 46: Hall

[0124] 47: Home

[0125] 50: Heat-resistant stakes

[0126] 60: First row belt member

[0127] 70: Second guide bracket

[0128] 72: Hall

[0129] 74: Fixation absence

[0130] 80: Spacing maintenance part

[0131] 81: Flange

[0132] 82: Web

[0133] 90: Second row belt member

[0134] 100: Second tensile member

[0135] 110: Third guide bracket

[0136] 202: First ground anchor

[0137] 204: Second ground anchor

[0138] 300: Manual resistance block

Claims

1. A plurality of rear piles (10) installed vertically to the ground and spaced apart at a predetermined interval while adjacent to the back soil; After the first stage of excavation of a predetermined depth is completed on the opposite side of the above-mentioned backing soil, a rear row belt member (20) formed adjacent to the plurality of rear row piles (10) in a direction perpendicular to the plurality of rear row piles (10) on the upper part of the first stage of excavation; A first guide bracket (40) coupled to the rear row belt member (20) and configured to change the wiring direction of a plurality of first tension members (30) to a direction perpendicular to the longitudinal direction of the rear row pile (10) so as to guide the first tension members (30) to penetrate the rear row belt member (20); A plurality of front-row piles (50) installed vertically with the first stage excavated ground and spaced apart from the plurality of rear-row piles (10) at a predetermined interval; A first heating belt member (60) formed adjacent to the plurality of heating piles (50) in a direction perpendicular to the plurality of heating piles (50) on the upper part of the excavated ground of the first stage; A second guide bracket (70) coupled to the first heat-conducting belt member (60) to guide the plurality of first tension members (30) to penetrate the first heat-conducting belt member (60) and to secure the first tension members (30) that have penetrated the first heat-conducting belt member (60); After the second stage of excavation is completed at a depth deeper than the first stage of excavation below the first heat-conducting belt member (60) while one end of the first tension member (30) is tensioned, a second heat-conducting belt member (90) formed adjacent to the plurality of heat-conducting piles (50) in a direction perpendicular to the plurality of heat-conducting piles (50) on the upper part of the second stage of excavation; and It includes a third guide bracket (110) that is coupled to the second heat-conducting belt member (90) and changes the wiring direction of a plurality of second tension members (100) to a direction perpendicular to the longitudinal direction of the heat-conducting pile (50) so that the second tension members (100) pass through the second heat-conducting belt member (90). The plurality of first tension members (30) above have one end that penetrates the second guide bracket (70) and then protrudes to the front of the second guide bracket (70), and the other end is fixed to the lower part of the ground. A two-row self-supporting soil retaining structure in which one end of the first tension member (30) is tensioned while the other end of the first tension member (30) is fixed to the lower part of the ground.

2. In claim 1, Between the rear row belt member (20) and the first heat transfer belt member (60), a gap maintaining member (80) is formed to support the rear row belt member (20) and the first heat transfer belt member (60), respectively, and to maintain a gap between the rear row belt member (20) and the first heat transfer belt member (60). The above spacing maintenance part (80) is formed in an H-beam shape consisting of a plurality of flanges (81) and webs (82). The above plurality of first tension members (30) are routed along the longitudinal direction of the web (82) while being secured to the upper surface of the web (82) and penetrate the first heat-conducting belt member (60), which is a two-row self-supporting temporary soil retaining structure.

3. In claim 1, The above plurality of second tension members (100) have one end protruding through the second heat-conducting belt member (90) and the other end fixed to the lower part of the ground where the first stage is excavated. A two-row self-supporting soil retaining structure in which one end of the second tension member (100) is tensioned while the other end of the second tension member (100) is fixed to the lower part of the first excavated ground.

4. In claim 3, The second heat transfer belt member (90) and the third guide bracket (110) are two-row self-supporting temporary earth retaining structures formed on the upper part of the N-stage excavated ground each time an N-stage excavation deeper than the second-stage excavated ground is completed below the second heat transfer belt member (90).

5. In claim 3, A two-row self-supporting soil retaining temporary structure in which the other end of the first tension member (30) and the other end of the second tension member (100) are fixed by grouting inside the SCW (Soil Cement Wall) wall.

6. In claim 3, A two-row self-supporting soil retaining temporary structure, in which the other end of the first tension member (30) and the other end of the second tension member (100) are respectively fixed by the first ground anchor (202) and the second ground anchor (204).

7. In claim 1, The above rear belt member (20) is Upper belt member (22); and It is composed of a lower belt member (24) arranged at a predetermined distance from the upper belt member (22) at the lower portion of the upper belt member (22). The above first guide bracket (40) is A pair of side plates (41) formed at a predetermined interval between the upper belt member (22) and the lower belt member (24) to support the upper belt member (22) and the lower belt member (24), respectively; A first vertical plate (42) arranged perpendicular to the pair of side plates (41) and having a rotating plate (43) protrudingly formed on one side thereof to change the wiring direction of the first tension member (30) to a direction perpendicular to the longitudinal direction of the rear pile (10); and A two-row self-supporting soil retaining structure including a second vertical plate (44) arranged parallel to the first vertical plate (42) and guiding the first tension member (30) toward the first heat-conducting belt member (60).

8. In claim 7, On both sides of the side plate (41), a protrusion (45) is formed to protrude to maintain the gap between the upper belt member (22) and the lower belt member (24). A two-row self-supporting soil retaining temporary structure, in which a pair of grooves (45a) are formed on the upper and lower surfaces of the above-mentioned protrusion (45), in which the upper belt member (22) and the lower belt member (24) are respectively installed.

9. In claim 7, A two-row self-supporting soil retaining structure, in which a plurality of holes (46) are formed on one surface of the first vertical plate (42) and the second vertical plate (44) for the first tension member (30) to pass through.

10. In claim 1, A two-row self-supporting soil retaining temporary structure, in which a passive resistance block (300) for supporting the heating pile (50) is grouted and fixed adjacent to the heating pile (50) at the lower part of the heating pile (50).

Images