Construction Method for Stepped Retaining Walls Using Horizontal Beam Connectors Between Pile Frames Installed in Stages

Abstract

The present invention relates to a construction method for stepped retaining walls using horizontal beam connectors between stepwise pile frames. Accordingly, the technical gist of the present invention is characterized by enabling construction to be carried out as close as possible to the district boundary line (site boundary line), which is the boundary of land (private or state-owned land, etc.) during civil engineering works for the construction of large-scale apartment complexes, roads, railways, and factories, while simultaneously maximizing the bearing capacity of the entire retaining wall system and preventing differential settlement through the stepwise stepped structure and the integrated connection of horizontal beams. In other words, the present invention enables the construction of a retaining wall as close as possible to the district boundary line or site boundary line, thereby ensuring efficient construction without wasting land and forming a multi-layered retaining wall system in a stepwise stepped form. Between the H-beams (pile supports) of each step, horizontal beams for an integrated reinforcing structure (made of SM steel material, allowing for mutual welding and ensuring uniform support of the front surface of the retaining wall) are included on the lower side, and an angle support bracket is included on the upper side The invention is characterized by ensuring superior load-bearing capacity compared to narrow land use sections by interconnecting and combining the self-supporting retaining wall panels (which are reinforced with vertical resistance) to promote the integration of the entire retaining wall system with a stepwise stepped structure (whereby as the land to be excavated narrows, the section available for compaction becomes constricted, differential settlement may occur to receive the vertical load of the H-beam pile support, and the present invention is intended to solve this). Furthermore, the present invention is characterized by stacking the retaining wall panels in a three-stage structure in a zigzag shape relative to the front, thereby improving the load-bearing capacity and aesthetics of the retaining wall, and by providing male and female interlocking protrusions and grooves on the upper and lower ends of the retaining wall panels, which allows the retaining wall panels stacked upward relative to the foundation block to be stacked and assembled sequentially while standing on their own without separate temporary support members.

Description

Technology Field

[0001] The present invention relates to a construction method for a stepped retaining wall using a horizontal beam connector between stepwise pile frames, characterized by enabling construction to be carried out as close as possible to the district boundary line (land boundary line) which is the boundary of the land (private land or state-owned land, etc.) during civil engineering work for the construction of various architectural structures including large-scale apartment complexes, roads, railways, factories, logistics warehouses, semiconductor factories, or intellectual property centers, while maximizing the bearing capacity of the entire retaining wall system and preventing differential settlement through the integration of horizontal beams between the stepwise stepped pile (H-beam structure) frames and the pile frames.

[0002] In other words, the present invention enables the construction of retaining walls that are as close as possible to the boundary of the earth or the land, thereby allowing for efficient construction without wasting land and forming a multi-layered retaining wall system in a stepped form. Furthermore, between the H-beams (pile supports) of each step, horizontal beams for an integrated reinforcing structure (made of SM steel, allowing for mutual welding and ensuring uniform support of the front of the retaining wall, and including angle support brackets on the lower side to reinforce vertical resistance to the upper self-supporting retaining wall panels) are interconnected to ensure the integration of the entire step-step retaining wall system, thereby guaranteeing superior support capacity compared to narrow land usage sections (when the land to be excavated becomes narrow and the section available for compaction becomes limited, differential settlement may occur to receive the vertical load of the H-beam pile supports, and the present invention is intended to solve this problem).

[0003] In addition, the present invention is characterized by allowing the retaining wall panels to be stacked in a three-tiered structure in a zigzag shape relative to the front, thereby improving the load-bearing capacity and aesthetics of the retaining wall, and by providing male and female interlocking protrusions and protrusion grooves on the upper and lower parts of the retaining wall panels, so that the retaining wall panels stacked upward relative to the foundation block can be stacked and assembled sequentially while standing on their own without separate temporary support members. Background Technology

[0004] Generally, in the process of civil engineering work for the construction of large apartment complexes, roads, railways, and factory sites, excavation work to cut away slopes and the construction of retaining walls to prevent slope collapse are essential.

[0005] Recently, as land acquisition costs (expropriation costs) have risen rapidly due to urbanization and industrialization, there is a growing need to construct retaining walls as close as possible to the boundary lines with adjacent land, such as district demarcation lines or district planning lines (site boundary lines), in order to maximize land use efficiency within a limited site.

[0006] This is because if the retaining wall is moved away from the property boundary, the usable land area is reduced, resulting in serious land waste and economic loss.

[0007] However, if the slope is cut very close to the site boundary, the workspace (compaction section) for filling and compacting backfill becomes very narrow.

[0008] When H-beam pile supports are installed vertically to support earth pressure in a state where the compaction section is narrowed, there is a very high risk of differential settlement occurring in which some sections sink downwards because the vertical load transmitted from the superstructure and soil is not properly distributed.

[0009] Uneven settlement can lead to cracking and collapse of the entire retaining wall, causing serious safety problems.

[0010] In addition, conventional self-supporting retaining wall structures are vulnerable to concentrated earth pressure or upper loads because they simply stack panels upwards, and they suffer from chronic problems such as extended construction periods and increased construction costs because separate temporary support members must be installed in a complex manner to ensure structural stability.

[0011] To elaborate, a wall that resists earth pressure to prevent soil or rock from collapsing is called a 'retaining wall,' and such a retaining wall is secured using anchors, rock bolts, or soil nails.

[0012] In conventional reinforced concrete retaining walls for civil engineering, the bending moment acting on the retaining wall due to the backfill soil typically increases in proportion to the cube of the height of the retaining wall; therefore, in order to secure the stiffness to counteract the bending moment, the cross-sectional area of ​​the retaining wall and the amount of reinforcement placed inside the wall increase significantly with the height of the retaining wall.

[0013] Consequently, conventional reinforced concrete retaining walls for civil engineering projects require a large amount of concrete and expensive rebar, which increases construction costs. Additionally, there are many cases of defects caused by construction difficulties, requiring continuous maintenance, and there is a risk of retaining wall collapse due to poor construction.

[0014] In addition, to prevent the collapse of the slope, the overturning moment must be minimized and the resistance moment maximized. Since safety measures are required accordingly, the slope must be kept below the angle of repose and a safe slope must be created to prepare for sudden natural disasters such as rain and earthquakes. Furthermore, when the height of the cross-section is large, the problem arises that the slope must be set to be slower as it goes down.

[0015] Meanwhile, conventional retaining wall panels are constructed in a stacked structure using temporary materials, and due to this construction structure that is not self-supporting, problems such as construction delays, safety issues, and increased construction costs continue to persist.

[0016] In addition, conventional retaining wall construction methods inevitably require a wide cutting area on the slope of the cut section to ensure a stable structure. This raises concerns about interference with other people's land, such as state-owned or private land, other than the land expropriated for earthworks. To resolve this, the land for construction must be purchased at excessive compensation, which ultimately causes an increase in construction costs. Prior art literature

[0017] 1. Korean Patent Publication No. 10-1297832 (Registered Aug. 12, 2013) The problem to be solved

[0018] The present invention aims to solve the aforementioned problems and provides a method for construction that can be carried out as close as possible to the district boundary line (land boundary line), which is the boundary of the land (private land or state-owned land, etc.) during civil engineering work for the construction of large apartment complexes or roads, railways, and factories, while maximizing the bearing capacity of the entire retaining wall system and preventing differential settlement through the stepwise stepped pile (H-beam structure) construction structure and the horizontal beam integration connection between the pile structures.

[0019] The purpose of this invention is to enable the construction of retaining walls that are as close as possible to the boundary of a district or a site, thereby allowing for efficient construction without wasting land and forming a multi-layered retaining wall system in a stepped form. Furthermore, between the H-beams (pile supports) of each step, horizontal beams for an integrated reinforcing structure (made of SM steel, allowing for mutual welding and uniform support of the front of the retaining wall, and including angle support brackets on the lower side to reinforce vertical resistance to the upper self-supporting retaining wall panels) are interconnected to ensure the integration of the entire step-step retaining wall system, thereby guaranteeing superior support capacity compared to narrow land usage sections (when the land to be excavated becomes narrow and the section available for compaction becomes limited, differential settlement may occur to receive the vertical load of the H-beam pile supports, and this invention is intended to solve this problem).

[0020] In addition, the present invention aims to improve the retaining wall's load-bearing capacity and aesthetics by stacking the retaining wall panels in a three-tiered structure in a zigzag shape relative to the front, and to provide male and female interlocking protrusions and protrusion grooves on the upper and lower ends of the retaining wall panels, thereby enabling the retaining wall panels stacked upward relative to the foundation block to stand independently in sequence and be stacked and assembled without separate temporary support members.

[0021] As described above, the objectives of the present invention are summarized as follows.

[0022] First, by constructing the retaining wall as close as possible to the district boundary line, which is the boundary with land owned by others or state-owned land, unnecessary costs for purchasing adjacent land are reduced and land use efficiency is maximized.

[0023] Second, to prevent differential settlement that may occur due to the narrowness of the excavation space and compaction section, a stepped structure is introduced, and the H-beams of each stage are interconnected with horizontal beams and tie beams so that the entire system resists as a single unit.

[0024] Third, the frontal arrangement structure of the retaining wall panels is improved to simultaneously enhance structural durability and aesthetic appearance.

[0025] Fourth, a rapid and economical retaining wall construction method is provided in which retaining wall panels can be stably self-standing and sequentially stacked and assembled without the need for separate temporary support members. means of solving the problem

[0026] To achieve this purpose, the present invention comprises: an upper beam installation step (S10) in which, after clearing the boundary and completing leveling through excavation and cutting on a target excavation site (a district boundary line or land boundary line bordered by state-owned or private land such as a mountain, road, railway, or land), a first drilling (10) is performed so that an upper H-beam (20: which prevents the collapse of the slope at the upper end of the excavation section, and as the upper H-beam (20) is inserted into the first drilling, a pile support body for upper support is formed in the transverse direction) is inserted into the first drilling (10); and a middle beam installation step (S20) in which a second drilling (30) is performed on one side of the leveled land surface facing forward from the location of the first drilling (10) (e.g., 1 to 3 m) so that a middle H-beam (40) is inserted into the second drilling (30); A step (S30) for integrating upper and middle beam structures, wherein a tie beam (50) is connected to one side of a middle H-beam (40) branched above the second hole (30) (in the left and right width direction, which is orthogonal to the axis of the middle H-beam from the surface facing the upper H-beam) so as to be mutually connected and fixed with a plurality of middle H-beams (40), and a horizontal beam (60) is connected in an orthogonal direction to one side of the tie beam (50) (the surface facing the upper H-beam) so as to be connected and fixed with one surface of the upper H-beam (20) (the surface facing the middle H-beam); A lower beam installation step (S40) in which, after completing leveling again on one side of the leveled ground surface (e.g., 1 to 3 m) facing forward from the location of the second drilling (30) through stepped excavation and cutting, a third drilling (70) is performed so that the lower H-beam (80) is inserted into the third drilling (70); and a lower beam installation step (S50) in which a fourth drilling (90) is performed on one side of the leveled ground surface (e.g., 1 to 3 m) facing forward from the location of the third drilling (70) so that the lower H-beam (100) is inserted into the fourth drilling (90);A lower beam structure integration step (S60) in which a tie beam (50) is connected to one side of a lower H-beam (100) branched above the fourth drilling (90) (left and right width direction, which is orthogonal to the axis of the lower H-beam from the surface facing the lower H-beam) so as to be mutually connected and fixed with a plurality of lower H-beams (100), and a horizontal beam (60) is connected in an orthogonal direction to one side of the tie beam (50) (the surface facing the lower H-beam) so as to be connected and fixed with one surface of the lower H-beam (80) (the surface facing the lower H-beam); A self-supporting retaining wall assembly step (S70) is configured and performed by pouring and curing lean concrete (110) on the upper surface of each tier's tie beam (50) and horizontal beam (60), installing foundation blocks (120) thereon, and then sequentially stacking and assembling a plurality of retaining wall panels (130).

[0027] Accordingly, in the upper and middle beam structure integration step (S30) and the lower and bottom beam structure integration step (S60), an angle support bracket (140) is positioned (joined and fixed) on the bottom surface of the tie beam (50) and the horizontal beam (60), and one vertical end (141) of the angle support bracket (140) is connected to one side of the surface where the upper H-beam (20) and the middle H-beam (40) face each other and to one side of the surface where the lower H-beam (80) and the bottom H-beam (100) face each other, so as to reinforce the downward resistance force of the tie beam (50) and the horizontal beam (60) (strengthening the support force or holding force for the self-supporting retaining wall panel).

[0028] In addition, when each end H-beam (20, 40, 80, 100) is inserted into each of the upper beam installation steps (S10), middle beam installation steps (S20), lower beam installation steps (S40), and lower beam installation steps (S50), a retaining plate (160) is formed to be installed on the back surface.

[0029] At this time, in the self-supporting retaining wall assembly stage (S70), U-shaped steel supports [170: also known as C-channels: in which H-beams of each end are arranged in parallel in one direction to form pile supports, and are inserted vertically in rows and columns, adjacent H-beams are formed so that their respective web panels (Web: central connecting plates connecting multiple flanges) face each other, and when viewing the H-beam inserted into the hole from a planar perspective, the open direction is formed to be continuous in the left-right width direction, and the U-shaped steel supports are inserted between them to connect and reinforce the web panels of adjacent H-beams, as well as to allow steel wires connected to the retaining wall panel to penetrate and be bolted (including fixing nuts)] are formed to be connected to the U-shaped steel supports (170), which are branched from the retaining wall panel (130). The anchor reinforcing bar (180) is formed to be fixedly connected by penetrating connection.

[0030] Accordingly, after the self-supporting retaining wall assembly stage (S70), aggregate backfilling (150) is performed on the back surface of each end H-beam, and a finishing stone (190) is installed on the upper part of each retaining wall panel to complete the capping finish. Effects of the invention

[0031] As such, the present invention has the effect of enabling construction to be carried out as close as possible to the district boundary line (land boundary line), which is the boundary of land (private land or state-owned land, etc.) during civil engineering work for the construction of large apartment complexes or the construction of roads, railways, and factories, while maximizing the bearing capacity of the entire retaining wall system and preventing differential settlement through the stepwise stepped pile (H-beam structure) construction structure and the horizontal beam integration connection between the pile structures.

[0032] The present invention enables the construction of retaining walls that are as close as possible to the boundary of a district or a site, thereby allowing for efficient construction without wasting land and forming a multi-layered retaining wall system in a stepped form. Furthermore, horizontal beams for an integrated reinforcing structure are interconnected between the H-beams (pile supports) of each step to ensure the integration of the entire step-step retaining wall system, thereby ensuring superior support capacity compared to narrow land usage sections.

[0033] In addition, the present invention allows the retaining wall panels to be stacked in a three-tiered structure in a zigzag shape relative to the front, thereby improving the load-bearing capacity and aesthetics of the retaining wall. Furthermore, the upper and lower parts of the retaining wall panels are provided with male and female interlocking joint protrusions and protrusion grooves, which has the effect of allowing the retaining wall panels stacked upward relative to the foundation block to stand independently in sequence and be stacked and assembled without separate temporary support members.

[0034] As described above, the effects of the present invention are summarized as follows.

[0035] First, maximizing land efficiency and reducing construction costs: Since pile supports and retaining walls can be constructed in close proximity to the district boundary (land boundary), there is no need to unnecessarily purchase land belonging to others (private or state-owned land) outside the designed construction area, which has the effect of drastically reducing land compensation and purchase costs.

[0036] Second, prevention of differential settlement and perfect load distribution: Even if the cut section is narrow and the compaction space is limited, the H-beams of each step of the stepped structure are interconnected in a grid pattern through horizontal beams and tie beams, so that the entire retaining wall system becomes integrated. Through this, the front surface supports the earth pressure uniformly, and the lower angle support bracket significantly reinforces the vertical resistance to the upper self-supporting retaining wall panels, thereby effectively preventing differential settlement at the source.

[0037] Third, improved structural stability and constructability: By forming male and female interlocking shear keys and shear key grooves on the upper and lower contact surfaces of the retaining wall panels, the panels can self-center and stand on the foundation blocks without the need for separate temporary structures (such as scaffolding or supports) and can be sequentially stacked and assembled, thereby significantly shortening the construction period.

[0038] Fourth, structural durability and beautiful aesthetics: Since the retaining wall panels are stacked in a zigzag pattern in three layers from the front, not only is durability improved due to the effect of dispersing earth pressure, but it also provides a three-dimensional and beautiful urban aesthetic, unlike flat existing retaining walls. Brief explanation of the drawing

[0039] FIG. 1 is an exemplary block diagram illustrating a stepped retaining wall construction method using a horizontal beam connector between step pile frames according to the present invention. FIG. 2 to 5 are exemplary diagrams illustrating structural integration between each end H-beam, tie beam, and horizontal beam according to the present invention. FIG. 6 to 8 are exemplary diagrams illustrating an optional embodiment of the present invention in which an assembly shock-absorbing band and a non-slip reinforcing member are applied to the joint groove between retaining wall panels. Specific details for implementing the invention

[0040] The present invention will be described below with reference to the attached drawings.

[0041] First, as illustrated in FIGS. 1 to 5, the present invention is largely composed of an upper beam installation step (S10), a middle beam installation step (S20), an upper and middle beam structure integration step (S30), a lower beam installation step (S40), a lower beam installation step (S50), a lower and lower beam structure integration step (S60), and a self-supporting retaining wall assembly step (S70).

[0042] Accordingly, the upper beam installation step (S10) is formed by excavating and cutting the boundary and completing the leveling of the intended excavation site (a district boundary line or land boundary line bordered by state-owned or private land such as a mountain or land), and then performing a first drilling (10) so that an upper H-beam (20: which prevents the collapse of the upper slope of the excavation section, and as the upper H-beam (20) is inserted into the first drilling, a pile support body for upper support is formed in the transverse direction) is inserted into the first drilling (10).

[0043] Subsequently, the intermediate beam installation step (S20) is formed by performing a secondary drilling (30) on one side of the flattened ground surface facing forward from the primary drilling (10) location (e.g., 1 to 3 m) so that the intermediate H-beam (40) is inserted into the secondary drilling (30).

[0044] Subsequently, the upper and middle beam structure integration step (S30) is formed such that a tie beam (50) is joined to one side of the middle H-beam (40) branched over the secondary drilling (30) (in the left and right width direction, which is orthogonal to the axis of the middle H-beam from the side facing the upper H-beam) so as to be mutually joined and fixed with a plurality of middle H-beams (40), and a horizontal beam (60) is connected and joined in an orthogonal direction to one side of the tie beam (50) (the side facing the upper H-beam) so as to be joined and fixed with one side of the upper H-beam (20) (the side facing the middle H-beam).

[0045] Afterwards, the lower beam installation step (S40) is formed by completing leveling again through stepped excavation and cutting on one side of the leveled ground surface (e.g., 1 to 3 m) facing forward from the second drilling (30) location, and then performing a third drilling (70) so that the lower H-beam (80) is inserted into the third drilling (70).

[0046] Afterwards, the lower beam installation step (S50) is formed by performing a fourth drilling (90) on one side of the flattened ground surface facing forward from the third drilling (70) location (e.g., 1 to 3 m) so that the lower H-beam (100) is inserted into the fourth drilling (90).

[0047] Subsequently, in the lower and lower beam structure integration step (S60), a tie beam (50) is connected to one side of the lower H-beam (100) branched above the fourth drilling (90) (in the left and right width direction, which is orthogonal to the axis of the lower H-beam from the surface facing the lower H-beam), thereby mutually joining and fixing with a plurality of lower H-beams (100). At the same time, a horizontal beam (60) is connected and joined in an orthogonal direction to one side of the tie beam (50) (the surface facing the lower H-beam) so as to be joined and fixed with one surface of the lower H-beam (80) (the surface facing the lower H-beam). (Each member is formed of SM material, thereby enabling mutual welding / Previously, it was made of SS material, making welding impossible.)

[0048] Afterwards, the self-supporting retaining wall assembly step (S70) is formed by pouring and curing lean concrete (110) on the upper surface of each tier's tie beam (50) and horizontal beam (60), then installing foundation blocks (120) on top of it, and then sequentially stacking and assembling a plurality of retaining wall panels (130).

[0049] Accordingly, in the upper and middle beam structure integration step (S30) and the lower and bottom beam structure integration step (S60), an angle support bracket (140) is formed to be placed (joined and fixed) on the bottom surface of the tie beam (50) and the horizontal beam (60).

[0050] At this time, one side vertical end (141) of the angle support bracket (140) is connected to one side of the surface where the upper H-beam (20) and the middle H-beam (40) face each other, and to one side of the surface where the lower H-beam (80) and the lower H-beam (100) face each other, so as to reinforce the downward resistance force of the tie beam (50) and the horizontal beam (60) (strengthening the support force or holding force for the self-supporting retaining wall panel).

[0051] For reference, the installation of the U-shaped steel supports, tie beams, and horizontal beams is applied identically between the middle H-beams and the lower H-beams, and is formed to be connected and joined. (Mutual welding is possible due to the use of SM material / Previously, welding was not possible due to the use of SS material.)

[0052] In addition, when each end H-beam (20, 40, 80, 100) is inserted into each of the upper beam installation steps (S10), middle beam installation steps (S20), lower beam installation steps (S40), and lower beam installation steps (S50), a retaining plate (160) is formed to be installed on the back surface.

[0053] At this time, in the self-supporting retaining wall assembly stage (S70), U-shaped steel supports [170: also known as C-channels: in which H-beams of each end are arranged in parallel in one direction to form pile supports, and are inserted vertically in rows and columns, adjacent H-beams are formed so that their respective web panels (Web: central connecting plates connecting multiple flanges) face each other, and when viewing the H-beam inserted into the hole from a planar perspective, the open direction is formed to be continuous in the left-right width direction, and the U-shaped steel supports are inserted between them to connect and reinforce the web panels of adjacent H-beams, as well as to allow steel wires connected to the retaining wall panel to penetrate and be bolted (including fixing nuts)] are formed to be connected to the U-shaped steel supports (170), which are branched from the retaining wall panel (130). The anchor reinforcing bar (180) is formed to be fixedly connected by penetrating connection.

[0054] Accordingly, after the self-supporting retaining wall assembly stage (S70), aggregate backfilling (150) is performed on the back surface of each end H-beam, and a finishing stone (190) is installed on the upper part of each retaining wall panel to complete the capping finish.

[0055] To elaborate, each end H-pile is formed such that multiple piles are erected at equal intervals in each section to form a single pile support, and each end H-pile is formed so that at least 60% of its total length can be inserted into each subsequent drilling.

[0056] At this time, the interior of each tiered hole into which each end H-pile is inserted is formed to be filled with concrete for pouring and curing.

[0057] In addition, each end H-pile is arranged so that the open ends correspond to the adjacent end H-pile, and is formed so that the U-shaped steel support is inserted through the opening in an up-and-down sliding manner and welded together at a set position.

[0058] That is, the U-shaped steel support is formed so that a steel wire branching rearward from the retaining wall panel (a steel wire protruding and branching rearward starting from the central fixing plate) is joined through it and then bolted together with a fixing nut. (This is to support and fix the front retaining wall panel from the rear while promoting lateral connection and structural integration between the H-piles at each end.)

[0059] In addition, the retaining wall panels are formed to have a three-tier structure when stacked vertically, and are stacked and joined in a zigzag shape when viewed from the front, thereby enabling overlapping assembly of the assembly joints.

[0060] Meanwhile, the retaining wall panels (130) are sequentially assembled upward on the foundation blocks (shear key grooves), and the lower part of the retaining wall blocks (130) is provided with a connecting projection (131), and the upper part of the retaining wall blocks is provided with a projection groove (132), so that when the retaining wall panels are stacked vertically, the connecting projection (131) and the projection groove (132) correspond to each other and are formed to be stacked and assembled in a mutually self-supporting structure.

[0061] Accordingly, as an optional embodiment, the protrusion groove (132) is provided with an insertion groove (133) on the upper surface of the protrusion groove (132) (the surface to which the coupling protrusions correspond and contact), and it is preferable that an assembly-type or unit-type assembly shock-absorbing band (400) be inserted and stored in the insertion groove (133).

[0062] Accordingly, the assembly shock mitigation band (400) is formed in the form of a bar or belt made of rubber or silicone material, as shown in FIGS. 6 to 8, and is formed with high elasticity to prevent the connecting protrusions from breaking or being damaged within the protrusion grooves when the stacked retaining wall panels are in close contact with each other. (When assembling using a crane, the connecting protrusions may break during the process of assembling to a set position or when the assembly position needs to be modified.)

[0063] Accordingly, the assembly shock absorbing band (400) is fitted into the insertion groove (133) and is formed so that it can be installed easily and conveniently.

[0064] For reference, the assembly shock absorbing band is formed so that it can be easily replaced from the inner groove even if it becomes damaged or worn out (including damage caused by external workpieces, oxidation by sunlight, or fraying) during the winter or rainy season when construction is required.

[0065] Here, it is preferable that the assembly shock absorbing band (400) further includes a non-slip reinforcing member (500).

[0066] That is, the non-slip reinforcing member (500) is provided with a sealing gasket (510), and on one side of the sealing gasket (510) it is largely composed of a fixing stick (520: rubber or silicone material with a high friction coefficient) having a pressing wing (521: rubber or silicone material with a high friction coefficient) and a magnetic pin (522) and a steel holder (530).

[0067] At this time, on one side of the assembly shock absorbing band (400), a stick groove (410) and a holder groove (420: a groove into which a steel holder is inserted) are formed to be connected, and on one side of the stick groove (410), an inclined surface (430) for storing a gasket is provided, and on one side of the inclined surface (430), a gasket insertion groove (440) is provided.

[0068] Accordingly, the sealing gasket (510) is formed such that a portion of its surface corresponds to the inclined surface (430), while another portion of the sealing gasket (510) is formed such that it branches upward according to the angle of the inclined surface (430), forms a free end, and then comes into contact with the connecting projection to ensure a solid non-slip surface by being horizontally sealed.

[0069] At this time, the pressing wing (521) of the fixing stick (520) is formed with a pressing surface at an angle corresponding to the inclined surface of the sealing gasket so as to press the pressing wing at the upper end of the inclined surface side.

[0070] And, the fixing stick (520) is fixed by pressing a portion of the surface of the sealing gasket (510), and a portion of the magnetic pin (522) is inserted and fixed inside, and another portion of the magnetic pin (522) branches downward so that when inserted into the insertion groove (531) of the steel holder (530: metal material), binding by magnetic force is immediately achieved.

[0071] For reference, the protruding part of the magnetic pin (522) is formed so that it is immediately secured by magnetic force simply by inserting it into the insertion groove (350) of the steel holder, and it is formed so that when the sealing gasket is replaced (including cases where the sealing gasket is damaged due to work being interrupted or stopped during retaining wall construction due to weather or schedule), it can be immediately attached and detached by removing the fixing stick.

[0072] And, the gasket insertion groove (440) is formed so that the sealing gasket (510) protrudes slightly more than the height difference between the sealing gasket (510) and the assembly shock absorbing band (400) is maintained horizontally, so that when the sealing gasket comes into contact with the coupling projection, it comes into contact first and then the assembly shock absorbing band.

[0073] This is intended to extend the lifespan of the assembly shock absorbing band, which has a large surface area structure, by allowing the sealing gasket to make contact first to perform the friction resistance function, and then allowing the assembly shock absorbing band to perform the friction resistance function.

[0074] In addition, the non-slip reinforcing member (500) is symmetrically formed on both sides with respect to the center of the assembly shock absorbing band (400) (the branched angles of the sealing gasket are formed in opposite directions), so that frictional resistance is secured in either direction when used left or right.

[0075] This is designed to reinforce the self-supporting capacity by preventing movement in the width direction (left-right direction) of the upper retaining wall panels during the pre-assembly installation (before the main work of fixing soil nails or anchors), and especially to strengthen the durability of the retaining wall by preventing rainwater from the soil side from flowing out through the front of the retaining wall panel joints after the installation assembly is completed.

[0076] The present invention is not limited to the specific preferred embodiments described above, and anyone with ordinary knowledge in the art to which the invention pertains can make various modifications without departing from the essence of the invention as claimed in the claims, and such modifications will be within the scope of the claims. Explanation of the symbols

[0077] S10 ... Upper beam installation step S20 ... Intermediate beam installation step S30 ... upper and middle beam structure integration stage S40 ... Bottom beam installation step S50 ... Low-end beam installation stage S60 ... lower, lower section beam structure integration stage S70 ... Self-supporting retaining wall assembly stage 10 ... 1st drilling 20 ... Upper H-beam 30 ... secondary drilling 40 ... intermediate H-beam 50 ... horizontal beam 60 ... horizontal beam 70 ... 3rd drilling 80 ... Lower H-beam 90 ... 4th drilling 100 ... Low-end H-beam 110 ... lean concrete 120 ... foundation block 130 ... retaining wall panel 140 ... angle bracket 150 ... concrete backfill 160 ... retaining wall 170 ... U-shaped steel support 180 ... anchor reinforcement

Claims

Claim 1 An upper beam installation step (S10) in which, after clearing the boundary and completing leveling of the intended excavation site through excavation and cutting, a first drilling (10) is performed so that an upper H-beam (20) is inserted into the first drilling (10); and a middle beam installation step (S20) in which a second drilling (30) is performed on one side of the leveled ground surface facing forward from the location of the first drilling (10) so that a middle H-beam (40) is inserted into the second drilling (30); A step (S30) for integrating upper and middle beam structures, wherein a tie beam (50) is connected to one side of a middle section H-beam (40) branched over a second drilling hole (30) so as to be mutually connected and fixed with a plurality of middle section H-beams (40), and a horizontal beam (60) is connected in an orthogonal direction to one side of the tie beam (50) so as to be connected and fixed with one side of the upper section H-beam (20); and a step (S40) for installing a lower beam, wherein after completing leveling again on one side of the leveled ground surface facing forward from the second drilling hole (30) through stepped excavation and cutting, a third drilling hole (70) is performed so that a lower section H-beam (80) is inserted into the third drilling hole (70); A lower beam installation step (S50) in which a fourth drilling (90) is performed on one side of the flattened ground surface facing forward from the location of the third drilling (70) so that the lower H-beam (100) is inserted into the fourth drilling (90); and a lower beam structure integration step (S60) in which a tie beam (50) is coupled to one side of the lower H-beam (100) branched over the fourth drilling (90) so as to be mutually joined and fixed with a plurality of lower H-beams (100), wherein a horizontal beam (60) is connected and coupled in an orthogonal direction to one side of the tie beam (50) so as to be joined and fixed with one side of the lower H-beam (80); A self-supporting retaining wall assembly step (S70) is configured such that lean concrete (110) is poured and cured on the upper surface of each tier's tie beam (50) and horizontal beam (60), then a foundation block (120) is installed thereon, and then a plurality of retaining wall panels (130) are sequentially stacked and assembled; in a stepped retaining wall construction method using horizontal beam connectors between tiered pile frames, the above,In the middle beam structure integration step (S30) and the lower and lower beam structure integration step (S60), an angle support bracket (140) is positioned on the bottom surface of the tie beam (50) and the horizontal beam (60), wherein one vertical end (141) of the angle support bracket (140) is connected to one side of the surface where the upper H-beam (20) and the middle H-beam (40) face each other, and to one side of the surface where the lower H-beam (80) and the lower H-beam (100) face each other, so as to reinforce the downward resistance of the tie beam (50) and the horizontal beam (60), and the retaining wall panel (130) is assembled sequentially in a zigzag pattern upward on the foundation block, wherein a connecting projection (131) is provided on the lower part of the retaining wall block (130), and a projection groove (132) is provided on the upper part of the retaining wall block When retaining wall panels are stacked vertically, the connecting protrusion (131) and the protrusion groove (132) correspond to each other, and are formed to be stacked and assembled in a mutually self-supporting structure. An insertion groove (133) is provided on the upper surface of the protrusion groove (132), and an assembly shock mitigation band (400) is formed to be inserted into the insertion groove (133). The assembly shock mitigation band (400) is provided with a non-slip reinforcing member (500), and the non-slip reinforcing member (500) is formed to have a sealing gasket (510) on one side. A fixing stick (520) having a pressing wing (521) and a magnetic pin (522) is provided on one side of the sealing gasket (510), and a steel holder (530) is provided on one side of the fixing stick (520). On one surface of the assembly shock mitigation band (400) A stick groove (410) and a holder groove (420) are formed to be connected, and an inclined surface (430) for storing a gasket is provided on one side of the stick groove (410), and a gasket insertion groove (440) is provided on one side of the inclined surface (430), and a portion of the surface of the sealing gasket (510) is positioned to correspond to the inclined surface (430), and another portion of the surface of the sealing gasket (510) is formed to branch upward according to the angle of the inclined surface (430) and to be in close contact horizontally when it comes into contact with the coupling projection (131).A step-type retaining wall construction method using a horizontal beam connector between step pile frames, characterized in that the pressing wing (521) of the fixing stick (520) is formed with a pressing surface at an angle corresponding to the inclined surface of the sealing gasket so as to press the pressing wing from the upper end of the inclined surface side, and the fixing stick (520) presses and fixes a part of the surface of the sealing gasket (510), and a part of the magnetic pin (522) is inserted and fixed inside the fixing stick (520), while another part of the magnetic pin (522) branches downward and is bound by magnetic force when inserted into the insertion groove (531) of the steel holder (530). 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