Earth retaining structure

Abstract

The present invention is an earth retaining structure that improves constructability, structural stability, and economic efficiency by integrating the steel support and the tie beam, which are king piles in an earth retaining structure capable of supporting back-side earth pressure using earth anchors. It comprises steel supports installed in the ground at regular intervals, a tie beam that fixes the outer end of an earth anchor installed in the ground at a regular interval from the steel supports, and a connector including a connecting rod to integrate the steel supports and the tie beam. Each end of the connecting rod is configured to be equipped with an angle adjustment means that allows the angle between the steel supports and the connecting rod and the angle between the tie beam and the connecting rod to be individually and freely adjusted.

Description

Technology Field

[0001] The present invention relates to an earth retaining structure, and more specifically, to an earth retaining structure configured such that the king pile and the tie beam are integrated to support the earth pressure on the back side using an earth anchor. Background Technology

[0003] Earth retaining structures utilizing underground anchors support earth pressure through the tensile force of anchors fixed in the ground behind the retaining wall. Since there is no need to install bracing in the excavation space where the structure is built, subsequent processes such as excavation and frame construction are not hindered. Furthermore, because the retaining wall is stably supported even in deep excavations or confined spaces, it is widely used in urban areas or for deep excavations.

[0004] The above earth retaining structure is typically constructed by installing H-shaped steel sheet piles in the ground at regular intervals, then installing retaining plates between each sheet pile to form a wall, and installing a tie beam in the longitudinal direction on the front of the wall facing the excavation space to anchor earth anchors thereto.

[0005] However, due to construction errors, the contact surface of each main column installed underground does not form a single plane but generally forms irregular surfaces at various angles.

[0006] Accordingly, Registered Patent Publication No. 10-2077421 aims to solve the problem of misalignment between the king pile and the tie beam by installing a groove-filling bolt between the king pile and the tie beam and allowing the installed angle to be freely changed.

[0007] The installation structure of the above-described groove-filling bolt is configured such that, as shown in FIG. 1, a groove-filling fixing plate (120) having a hemispherical groove formed therein is installed by welding, a ball nut (125) is inserted into the hemispherical groove, one end of the groove-filling bolt (130) is screwed onto the ball nut (125), and the other end is fixed to the flange of the tie beam (100) with a fixing nut (140).

[0008] However, the installation structure of such a groove-filling bolt (130) has a hinge structure that allows rotation only in the portion of the king pile (12), so in order to clearly transfer the load while connecting with the king pile (12) installed at an angle, a variable angle washer with an angle corresponding to the angle of inclination of the king pile (12) is required between the flange of the tie beam (100) and the fixing nut (140), so the installation work of the groove-filling bolt (130) becomes very cumbersome.

[0009] Of course, the groove-filling bolt (130) can be installed and fixed vertically on the flange of the tie beam (100) to ensure clear load transfer, but in this case, the installation work of the groove-filling fixing plate (120) installed on the thumb pile (12) must be done after the installation of the groove-filling bolt (130) on the tie beam (100) is completed, so the inconvenience of the installation work of the groove-filling bolt (130) is not eliminated.

[0010] On the other hand, a compressive force is applied between the thumb pile (12) and the tie beam (100) by the earth anchor (200), and the groove-filling bolt (130) installed between them acts as a compression member.

[0011] The magnitude of the buckling load that causes such buckling deformation is inversely proportional to the square of the member length. In other words, the shorter the length of a compression member, the greater its buckling stiffness can be.

[0012] However, in the case of registration number 10-2077421, since the groove-filling bolt (130) is connected to the tie beam (100) with one end fixed in a hinge structure to the groove-filling fixing plate (120) which is pre-welded to the thumb pile (12), the length of the groove-filling bolt (130) cannot be minimized, and in some cases, there is a problem that the buckling load increases due to the increase in length. Prior art literature

[0014] (Patent Document 0001) KR 10-2077421 B1 The problem to be solved

[0015] The present invention was devised to solve the above-mentioned problems of the prior art, and aims to improve constructability by ensuring clear load transfer between steel supports and tie beams and simplifying connection work, and to prevent buckling deformation of compression members installed between them by minimizing the buckling load on the connecting members between steel supports and tie beams, and to enable the construction of an economical earth retaining wall by maximizing the recycling of the members used for this purpose. means of solving the problem

[0017] The earth retaining structure of the present invention for solving the above-mentioned problem comprises steel posts installed in the ground at regular intervals, a tie beam that fixes the outer end of an earth anchor installed in the ground at a regular interval from the steel posts, and a connector including a connecting rod for integrating the steel posts and the tie beam, wherein each end of the connecting rod is configured to be equipped with an angle adjustment means that allows the angle between the steel posts and the connecting rod and the angle between the tie beam and the connecting rod to be freely adjusted individually.

[0018] The connection of the connecting rod to the steel support can be made via a polygonal bracket, and in this case, the polygonal bracket is installed so as to be detachable from the steel support.

[0019] In an embodiment regarding the installation of a polygonal bracket on a steel support, a pair of fixing members having an L-shaped cross-section and an insertion groove formed in the steel support are installed symmetrically in the upper and lower directions. The polygonal bracket may be configured such that one end of a connecting rod is fixed to a bracket body and a rear plate of the main body is integrally formed with the bracket body and is inserted into the insertion groove so as to be detachably attached, thereby allowing the polygonal bracket to be installed directly on the steel support, or a height adjustment member that is detachably attached to the insertion groove may be inserted and installed, and the polygonal bracket may be installed on the height adjustment member.

[0020] When a polygonal bracket is installed on a height adjuster, the height adjuster is configured with a fixed back plate that is detachably inserted into an insertion groove and a regulating side plate located on both sides of the fixed back plate and having a plurality of regulating holes provided at regular intervals, and by installing a fixed side plate with fixing holes on both sides of the polygonal bracket and setting the fastening position of the regulating holes and the fixing holes, the height of the polygonal bracket can be set.

[0021] The angle adjustment means of the most preferred embodiment consists of a pair of sliding bodies through which a connecting rod passes and a dome nut. At this time, the sliding body is configured such that a bowl portion with a curved inner surface is formed on one side and an expansion portion with an inclined inner surface is formed on the other side, centered around a central through hole, and the dome nut is formed with a female screw fastening in the center in the longitudinal direction and consists of a rotating portion and a fastening portion in the front and rear directions.

[0022] In the most preferred embodiment, the tie beam is formed integrally by a gripping piece to which a connecting rod is fixed, by spaced-apart a pair of C-shaped steel sections facing each other. Effects of the invention

[0024] The present invention features a hinge structure that allows the fixing of both ends of the connecting rod to the steel support and the tie beam to be rotatable, thereby simplifying the work and promoting rapid operation by completing the connection work at the site solely through the fastening of dome bolts. Furthermore, load transfer is clearly achieved regardless of the angle between the steel support and the connecting rod, or between the tie beam and the connecting rod. In addition, the present invention improves the structural stability of the earth retaining wall by reducing the buckling length of the connecting rod and minimizing the buckling load through vertical adjustment of the connection position of the connecting rod to the steel support. Moreover, the present invention enables the separation of the multi-angle bracket without damaging the steel support, thereby allowing for the repeated use of the steel support and the multi-angle bracket, which enables the construction of an economical earth retaining wall. Brief explanation of the drawing

[0026] Figure 1 is a partial explanatory diagram of an earth retaining structure according to the prior art. FIG. 2 is a perspective view of a retaining wall to which the retaining wall structure of the present invention is applied. FIG. 3 is a perspective view of an earth retaining structure according to the first embodiment of the present invention. FIG. 4 is a perspective view of each embodiment of the band of the present invention. FIG. 5 is an explanatory diagram of the connection structure of the present invention. FIG. 6 is a perspective view and a cross-sectional view of the sliding body among the above-mentioned connectors. FIG. 7 is a perspective view and a cross-sectional view of the dome bolt among the above connectors. Figure 8 is an explanatory diagram regarding the operation of the above-mentioned connector. FIG. 9 is an elevation view of the steel support and the tie beam integrated by the above connector. FIG. 10 is an explanatory diagram regarding the multi-angle bracket installation structure of the present invention. FIG. 11 is a perspective view of an earth retaining structure according to a second embodiment of the present invention. FIG. 12 is an explanatory diagram regarding the installation structure of a multi-angle bracket in the second embodiment above. FIG. 13 is an explanatory diagram regarding the operation of the polygonal bracket of the second embodiment above. Specific details for implementing the invention

[0027] Hereinafter, the present invention will be described in detail based on the most preferred embodiment with reference to the attached drawings. However, in describing the present invention, if specifically describing a known configuration would obscure or obscure the technical concept of the present invention, the description of the known configuration will be omitted.

[0029] FIG. 2 illustrates a retaining wall constructed by the retaining wall structure of the present invention, and FIG. 3 shows a first embodiment of the retaining wall structure in its entirety.

[0030] The earth retaining structure of the present invention, as shown in FIG. 2, is configured so that the entire wall surface of the earth retaining structure supported by earth anchors (101) evenly shares the backfill pressure, thereby ensuring that the excavation surface is maintained stably. As shown in FIG. 3, it is composed of steel supports (1) installed in the ground at regular intervals, a tie beam (2) installed on the front of the steel supports (1), and a connecting body (3) that structurally integrates the steel supports (1) and the tie beam (2).

[0031] The steel support (1) corresponds to the king pile of the earth retaining wall and is installed in the ground at regular intervals to transfer the load acting on the wall surface of the earth retaining wall to the tie beam (2).

[0032] At this time, the above earth retaining wall may be a retaining plate earth retaining wall formed by inserting retaining plates (102) between each steel support (1), as exemplified in FIG. 2, or it may be a row-type earth retaining wall formed by concrete piles in situ. In the case of the latter row-type earth retaining wall, the structure described below is formed with the front of the steel support (1) exposed.

[0033] The tie beam (2) in the earth retaining structure evenly distributes the load acting on each steel support (1), thereby enabling the earth retaining structure to maintain the excavation surface stably.

[0034] In the present invention, the tie beam (2) is installed at a certain distance from the steel support (1), thereby enabling correction of the construction error of the steel support (1) together with the angle adjustment means described later.

[0035] FIG. 4 illustrates each embodiment regarding the structure of the band (2) of the present invention.

[0036] The tie beam (2) of the present invention may be composed of various cross-sections such as H-shaped steel beams or box-shaped square tubes, but the tie beam (2) of the most preferred embodiment is formed by arranging a pair of lightweight steel sections (21), such as square steel or U-shaped steel, so as to be spaced apart from each other and then integrating them by means of a gripping piece (22), thereby creating a wide space between them, which enables smooth operation of the angle adjustment means inside the tie beam (2) even though it has a large thickness.

[0037] The above gripping piece (22) may be installed to cover the entire spaced-apart area as in FIG. 4 (a), or may be installed to cover only a part of the spaced-apart area as in FIG. 4 (b) (c). When the gripping piece (22) is installed to cover only a part of the spaced-apart area, the length of the connecting rod (50) and the earth anchor (101) can be minimized by moving the pressure piece (not shown) that fixes the gripping piece (22) or the earth anchor (101) to the left and right so that the connecting rod (50) and the earth anchor (101) can be fixed at the optimal position of the tie beam (2).

[0038] The outer end of the earth anchor (101) installed in the ground is fixed to the tie beam (2) configured in this manner, and the earth anchor (101) pulls the tie beam (2) with tensile force, thereby allowing the earth retaining wall to support its back earth pressure as described above.

[0039] Figure 5 shows the components of the connector (3) disassembled to explain their configuration.

[0040] The connecting body (3) that structurally integrates the steel support (1) and the tie beam (2) is composed of a connecting rod (50) equipped with a fastening screw (53) and an angle adjustment means, as shown in FIG. 5.

[0041] The connecting rod (50) functions as a compression member that stably transmits the compressive force transmitted through the tie beam (20) to the steel support (1), and is also fixed to the polygonal bracket (60) and the gripping piece (22) described later via an angle adjustment means, thereby maintaining the structural connection state of these members continuously.

[0042] The angle adjustment means is positioned at each end of the aforementioned connecting rod (50) to allow the angle between the steel support (1) and the connecting rod (50) and the angle between the tie beam (2) and the connecting rod (50) to be individually and freely adjusted, and consists of a pair of sliding bodies (30) and a dome nut (40).

[0043] FIGS. 6 to 8 illustrate the angle adjustment means, where FIG. 6 illustrates the structure of the sliding body (30), FIG. 7 illustrates the structure of the dome nut (40), and FIG. 8 illustrates the relationship in which the sliding body (30) and the dome nut (40) operate organically.

[0044] As shown in FIG. 6, the sliding body (30) is a plate-shaped member having a predetermined thickness, and is provided with a through hole (31) in the center, and a bowl portion (32) is formed on one side centered thereon and an expansion portion (33) is formed on the other side.

[0045] In addition, the dome nut (40) is configured such that, as shown in FIG. 7, a female screw (43) is provided in the center in the longitudinal direction so as to be screwed into the male screw (53) of the connecting rod (50), and is composed of a rotating part (41) and a fastening part (42) in the front and rear directions.

[0046] The bowl portion (32) of the sliding body (30) has the rotating portion (41) of the dome nut (40) inserted into it. The inner surface of the bowl portion (32) and the outer surface of the rotating portion (41) are formed of curved surfaces with the same curvature. Therefore, the rotating portion (41) inserted into the bowl portion (32) can rotate freely in all directions.

[0047] For example, when the connecting rod (50) rotates in correspondence with the angle between the front of the flange of the steel support (1) and the front of the tie beam (2), as shown in FIG. 8, a pair of sliding bodies (30) slide in opposite directions on both sides of the member to be connected (the flange of the steel support (1), the bracket body (61) described later, or the tie beam (2)).

[0048] At this time, the expansion portion (33) of the sliding body (30) has an inner surface formed as an inclined surface, which expands the range of rotation so that when the connecting rod (50) inserted through the through hole (31) rotates together with the rotation of the rotating portion (41), the connecting rod (50) can rotate until it comes into contact with the inclined surface.

[0049] After the rotation of the aforementioned connecting rod (50) is completed, if the screw is tightened using the fastening part (42) of the dome nut (40) located on each outer side of the sliding body (30), the steel support (1) and the tie beam (2) are structurally integrated as described above.

[0050] FIG. 9 illustrates the state in which both ends of the connector (3) configured as described above are fixed to the support and the tie beam (2), respectively.

[0051] One end of the connector (3) may be directly fixed to the flange of the steel support (1). However, in a more preferred embodiment, one end of the connector (3) is fixed to the steel support (1) via a polygonal bracket (60) as shown in FIG. 9, and the polygonal bracket (60) is installed so as to be detachable from the steel support (1).

[0052] For example, as shown in FIG. 10, a pair of fixing brackets (11) with an L-shaped cross section are installed symmetrically in the vertical direction on the flange of the steel support (1) so that each insertion groove (11a) is formed on the inner side, and the polygonal bracket (60) is configured with a bracket body (61) to which one end of the connecting rod (50) is fixed, and a main body rear plate (62) that is integrally formed with the bracket body (61) and inserted so as to be detachably inserted into the insertion groove (11a), thereby making the polygonal bracket (60) detachable from the steel support (1).

[0053] This detachable bracket structure minimizes damage to the steel support (1) when the earth retaining wall is dismantled after construction is completed, thereby enabling the repeated use of the steel support (1) as well as the multi-angle bracket (60), which reduces material waste.

[0054] In the earth retaining structure according to the first embodiment of the present invention, one end of the connecting rod (50) is fixed to the polygonal bracket (60) by an angle adjustment means, and the other end of the connecting rod (50) is also fixed to the tie beam (2) by an angle adjustment means, thus having a rotating end structure at both ends. Unlike the aforementioned prior art in which one end is fixed vertically to the tie beam (2), there is no need to adjust the position of the steel support (1) and the tie beam (2) to which the connecting rod (50) is fixed.

[0055] However, even in this case, since the fixed position of the connecting rod (50) relative to the steel support (1) is invariant, there are limitations in reducing the buckling load acting on the connecting rod (50), which is a compression member.

[0056] Accordingly, in the earth retaining structure of another second embodiment of the present invention, the polygonal bracket (60) is installed so as to be able to move up and down on the steel support (1), thereby minimizing the buckling length and buckling load through a change in the fixed position of the connecting rod (50) on the steel support (1).

[0057] FIGS. 11 to 13 illustrate a retaining wall structure capable of vertical movement of the polygonal bracket (60) as described above, FIG. 11 shows the retaining wall structure of the second embodiment in its entirety, and FIGS. 12 and 13 illustrate the structure and operation of the polygonal bracket (60) applied thereto.

[0058] In the earth retaining structure of the second embodiment, the configuration of the tie beam (2) and the connector (3) is not different from that of the first embodiment, so the description thereof is omitted.

[0059] In the second embodiment, the multi-angle bracket (60) is installed so as to be detachably attached to the steel support (1) via a height adjustment body (70).

[0060] More specifically, a pair of fixing brackets (11) with an L-shaped cross section having an insertion groove (11a) formed therein are installed vertically symmetrically on the steel support (1), as in the first embodiment, but a height adjustment member (70) is installed so as to be detachably attached to the steel support (1) through the insertion groove (11a), and a polygonal bracket (60) is installed on the height adjustment member (70), thereby making the polygonal bracket (60) detachable from the steel support (1). At this time, the polygonal bracket (60) is installed on the height adjustment member (70) in a structure that allows for vertical position adjustment.

[0061] In the most preferred embodiment for this, the height adjuster (70) is composed of a fixed rear plate (71) that is detachably inserted into an insertion groove (11a), as shown in FIG. 12, and adjustable side plates (72) located at both ends of the fixed rear plate (71) for connection with a polygonal bracket (60).

[0062] At this time, the adjustment side plate (72) is provided with a plurality of adjustment holes (72a) at regular intervals, and a fixing side plate (63) is installed on both sides of the polygonal bracket (60) so that it can be bolted together with the adjustment holes (72a), thereby allowing the polygonal bracket (60) to move up and down on the height adjustment body (70). For example, as shown in FIG. 13, the height of the polygonal bracket (60) is set by setting the fastening positions of the adjustment holes (72a) and the fixing holes (63a) to correspond to the angle and end position of the connecting rod (50).

[0063] In this way, in the earth retaining structure according to the second embodiment of the present invention, both ends of the connecting rod (50) are connected to the steel support (1) and the tie beam (2) by a hinge structure so that they can rotate freely, and the position where one end of the connecting rod (50) is fixed to the steel support (1) can be changed through a vertically movable polygonal bracket (60), thereby minimizing the buckling length and buckling load of the connecting rod (50).

[0064] Of course, the same effects as preventing material waste due to the repeated use of the polygonal bracket (60) and steel support (1) in the first embodiment can be expected in the second embodiment described above.

[0066] Although the present invention has been described in detail above with reference to specific embodiments, the above embodiments are merely examples to facilitate understanding of the invention, and it is obvious that those skilled in the art can modify and implement the invention in various ways within the scope of the technical concept of the invention. Accordingly, such modifications shall be deemed to fall within the scope of the rights of the present invention as described in the claims. Explanation of the symbols

[0068] 1; Steel support 2; Bracket 3; Connector 11; Fixing bracket 11a; Insertion groove 21; Lightweight section steel 22; gripping piece 30; sliding body 31; through hole 32; bowl part 33; expansion section 40; dome nut 41; Meeting part 42; Connecting part 43; female fastening screw 50; connecting rod 53; Fastening screw 60; Multi-sided bracket 61; Bracket body 62; Body rear plate 63; Fixed side plate 63a; Fixing hole 70; Height adjuster 71; Fixed back plate 72; Adjustment side plate 72a; Adjustment hole 101; Earth Anchor 102; Earth Retaining Plate

Claims

Claim 1 The apparatus comprises steel posts (1) installed in the ground at regular intervals, a tie beam (2) that fixes the outer end of an earth anchor installed in the ground at a regular interval from the steel posts (1), and a connecting body (3) that includes a connecting rod (50) for integrating the steel posts (1) and the tie beam (2). Each end of the connecting rod (50) is provided with an angle adjustment means that allows the angle between the steel posts (1) and the connecting rod (50) and the angle between the tie beam (2) and the connecting rod (50) to be individually and freely adjusted. The angle adjustment means is composed of a pair of sliding bodies (30) through which the connecting rod (50) passes and a dome nut (40). The sliding body (30) is formed such that, centered around a central through hole (31), a bowl portion (32) with a curved inner surface is formed on one side, and an expansion portion (33) with an inclined inner surface is formed on the other side. A retaining wall structure comprising, wherein the dome nut (40) is characterized by having a female screw (43) formed in the center in the longitudinal direction and being composed of a rotating part (41) and a fastening part (42) in the front and rear directions. Claim 2 A retaining wall structure according to claim 1, characterized in that a polygonal bracket (60) is detachably installed on a steel support (1), one end of a connecting rod (50) is fixed to the polygonal bracket (60) by an angle adjustment means, and the other end of a connecting rod (50) is fixed to a tie beam (2) by an angle adjustment means. Claim 3 In paragraph 2, a pair of fixing brackets (11) having an L-shaped cross section with an insertion groove (11a) formed therein are installed symmetrically in the upper and lower directions on the steel support (1), and the polygonal bracket (60) is composed of a bracket body (61) to which one end of a connecting rod (50) is fixed, and a main body rear plate (62) integrally formed with the bracket body (61) and inserted so as to be detachably inserted into the insertion groove (11a), characterized in that it is an earth retaining structure. Claim 4 In paragraph 2, the earth retaining structure is characterized in that the polygonal bracket (60) is installed on the steel support (1) so as to be able to move up and down. Claim 5 In claim 4, a pair of fixing members (11) having an L-shaped cross section with an insertion groove (11a) formed therein are installed vertically symmetrically on the steel support (1), and a polygonal bracket (60) is installed so as to be detachably attached to the steel support (1) via a height adjustment member (70), wherein the height adjustment member (70) is composed of a fixing back plate (71) that is detachably inserted into the insertion groove (11a) and a adjusting side plate (72) located on both sides of the fixing back plate (71) and having a plurality of adjusting holes (72a) provided at regular intervals, and a fixing side plate (63) having a fixing hole (63a) provided on both sides of the polygonal bracket (60) is installed, and the height of the polygonal bracket (60) is set by setting the fastening position of the adjusting hole (72a) and the fixing hole (63a). Claim 6 delete Claim 7 In claim 1, the above-mentioned tie beam (2) is characterized by being integrally formed by a pair of lightweight steel sections (21) spaced apart so as to face each other, and a connecting rod (50) fixed to a gripping piece (22). Claim 8 In claim 7, the earth retaining structure is characterized in that the above-mentioned gripping piece (22) is installed to cover only a portion of the spaced-apart space between a pair of lightweight steel sections (21).

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