KR101826476B1 - Construction method for large area using struts supporting structure - Google Patents

Abstract

The present invention relates to a construction method to excavate a large area using a strut supporting structure, presenting a method usable to a strut support method for underground excavation of a large area, capable of correcting an error when design and installation errors occur while securing a wide working space in comparison with a lattice type strut structure, and capable of being adjusted in various shapes in accordance with a size of a land area, thereby being applicable to various construction sites. According to the present invention, the method comprises: an outer earth retaining wall construction step of constructing an outer earth retaining wall on a land boundary surface in the underground excavation of a large area; an independent boundary surface setting step of setting an independent boundary surface as much as a predetermined area inside the land boundary surface; an inner earth retaining wall construction step of constructing an inner earth retaining wall on the independent boundary surface; an outer strut support construction step of constructing an outer strut support structure between the outer and inner earth retaining walls while excavating a land area between the land boundary surface and the independent boundary surface; and an inner strut support construction step of constructing an inner strut support structure inside the inner earth retaining wall while excavating an independent area inside the independent boundary surface.

Description

TECHNICAL FIELD [0001] The present invention relates to a method of constructing a large area terrager using a strut support structure,

The present invention relates to a method of constructing an underground structure and an underground structure, and more particularly, to a method of constructing an underground structure and an underground structure by using a strut support structure that can be freely used in a large- And a method of constructing and destroying the same.

Generally, when a building is constructed, a basement layer is constructed. In order to construct such a basement layer, an underground structure must be installed from the underground floor to the underground floor.

At this time, in order to descend to the deep underground, the earth retaining walls for preventing the collapse of the earth slope due to the earth pressure and the order grouting for blocking the ground water must be constructed. The construction of the retaining walls and grouting for the underground construction of such a building is referred to as temporary construction.

Among these temporary wall construction methods, there are fountain wall wall construction method, Soil Cement Wall (SCW) method, Diaphragm Wall method and CIP (Cast In Place Pile) method.

When the earth retaining wall is constructed by the earth retaining wall construction method, a support structure for supporting the earth retaining wall by the horizontal earth pressure is installed. Examples of the support structure method include an earth anchor method, a top down method, and a strut method.

Although the earth anchor method is mainly used as a large-scale ter- ror construction method because an earth anchor is installed on the outer side of a subterranean digging area, there is a disadvantage that a site other than the ground area is required. In the top down construction method, However, since there is a problem that the construction period becomes very long, a strut method that can shorten the construction period within the area of the land is widely used.

As shown in FIGS. 1 to 3, the strut method generally comprises horizontally installing a plurality of struts 20 in a lattice shape so as to support the horizontal earth pressure of the earth retaining wall 10 during the subterranean digging. The struts 20 are installed at regular intervals across the earth retaining walls 10 facing each other.

Accordingly, when the ground area is wide in the subterranean digging work, the length of the strut 20 has to be long, so that the strut 20 is horizontally buckled downward due to its own weight. In order to prevent the strut 20 from buckling horizontally, a post file 30 is installed along the longitudinal direction of the strut 20. Since the post file 30 is installed vertically with respect to the strut 20 installed in the horizontal direction, the post file 30 has no relation to the horizontal earth pressure and supports the strut 20 such that the strut 20 supports the self- It only plays a role.

The strut supporting method according to the related art requires a large number of post files 30 as a plurality of struts 20 are horizontally installed in a lattice shape in order to support the horizontal earth pressure of the earth retaining wall 10 . However, even if a large number of postfiles 30 are installed here, the length of the strut 20 installed in the horizontal direction can not be extended indefinitely.

That is, in the strut guarding method, it is general that the ground area progresses within a range of approximately 50 m in length or length, and it is difficult to use the strut guarding method in the case of having a large area such as 100 x 100 m or more there is a problem. Also, when a large number of post files 30 are installed, it is difficult for a large excavator or the like for underground excavation to enter by the struts 20 arranged in a lattice shape, and the work space is not secured by the post file 30 There is a problem that the working efficiency is remarkably lowered.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems and it is an object of the present invention to provide a method of using a strut girder method for a large area underground wave structure, And to provide a method of constructing a large area ter- minator using a strut support structure that can be applied to various construction sites because it can be adjusted in various shapes according to the size of the land area.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments with reference to the accompanying drawings.

In order to accomplish the above object, there is provided a method of constructing a large area terrrubber using a strut support structure according to the present invention, comprising the steps of: constructing an outer earth retaining wall construction for constructing an outer earth retaining wall at a site boundary when a large- The method comprising the steps of: setting an independent boundary surface to a predetermined width inside the interface; constructing an inner earth retaining wall for constructing the inner earth retaining wall on the independent boundary surface; An inner strut support structure for constructing an inner strut support structure between the outer earth retaining wall and the inner earth retaining wall and an inner strut support structure for constructing an inner strut support structure inside the inner earth retaining wall while rolling the independent area inside the independent boundary surface; And a construction step.

The outer strut support structure or the inner strut support structure may be a lattice type strut support structure or a horizontal polygonal strut support structure.

The horizontal polygonal strut support structure may include a plurality of postfiles vertically arranged at positions corresponding to vertices of a polygon designed in advance within the ground area or the independent area, A plurality of outer support beams fixedly coupled to each other via an outer bracket and a plurality of ends each of which is fixedly connected to the wedge of the outer earth retaining wall or the inner earth retaining wall and each of the other ends is fixedly coupled to each of the outer support beams A plurality of inner support beams fixedly coupled to the other surface of each of the post files via respective inner brackets and a plurality of inner support beams connected in series so as to form a horizontal polygonal shape while forming a single closed curve on each of the inner support beams And a plurality of horizontal polygonal struts.

Each of the horizontal polygonal struts may have a regular polygonal shape.

The connection control frame may include a connection adjustment frame fixedly installed on each of the inner support beams, and a connection adjustment frame provided on each of right and left sides of the connection adjustment frame, connecting a pair of the horizontal polygonal struts to each other, And a pair of connection adjustment portions capable of adjusting the connection length and angle.

Each of the connection adjusting portions includes an angle adjusting member whose one end is rotatably coupled to the connection adjusting frame with a vertical axis as a center of rotation and the other end is formed with a thread on an inner circumferential surface of a cylindrical shape, A length adjusting member screwed to the other end of the angle adjusting member so as to be pulled in and out from the other end of the length adjusting member; And a strut connecting member which is inserted and connected to be engaged with one end or the other end of the strut connection member.

In addition, the length adjusting member may include a plurality of grip protrusions formed radially on the outer circumferential surface.

In the method of constructing the large-area terruster using the strut support structure according to the present invention, a separate independent boundary surface is set inside the ground area when the large-area subterranean terraces are destroyed, and an inner earth retaining wall is formed on the independent boundary surface independently of the outer earth retaining wall The construction method is proposed to use the stratification method even in the case of large area underground wave.

Especially, it is possible to secure a wide working space through a plurality of horizontal polygonal struts connected in series so as to form a horizontal polygonal shape while forming a single closed curve at the time of construction of the strut support structure. Through the connection adjustment frame and the connection adjustment portion, It can be adjusted to various sizes according to the area of the land, and it can be applied to various construction sites, and it is easy to carry, store and assemble.

FIG. 1 is a side cross-sectional view illustrating a subterranean disposal method according to a conventional grill type strut support system,
Figure 2 is a plan view of the embodiment of Figure 1,
Fig. 3 is a perspective view showing a lattice-shaped strut support structure in the embodiment of Fig. 1,
FIG. 4 is a flowchart showing a large area ter- minator construction method using the strut support structure according to the present invention,
FIG. 5 is a side cross-sectional view illustrating a process of constructing an outer stranded wall construction step to an outer strut support construction step using a grid-type strut support structure in the embodiment of FIG. 4,
Figure 6 is a plan view of the embodiment of Figure 5,
FIG. 7 is a side cross-sectional view illustrating a process of constructing the inner strut support structure in the embodiment of FIG. 4 using a grid-like strut support structure,
Figure 8 is a plan view of the embodiment of Figure 7,
FIG. 9 is a side cross-sectional view illustrating a process of constructing the outer stranded wall construction step to the outer strut support construction step using the horizontal polygonal strut support structure in the embodiment of FIG. 4,
Figure 10 is a plan view of the embodiment of Figure 9,
FIG. 11 is a side cross-sectional view showing a process of constructing the inner strut support structure in the embodiment of FIG. 4 using a horizontal polygonal strut support structure,
Figure 12 is a plan view of the embodiment of Figure 11,
Fig. 13 is a plan view showing a horizontal polygonal strut support structure of the embodiment of Fig. 12,
Fig. 14 is a main part perspective view showing the unit structure of the horizontal polygonal strut support structure in the embodiment of Fig. 13,
FIG. 15 is a perspective view illustrating a process of inserting a pair of horizontal polygonal struts on the right and left sides of the connection adjusting unit in the embodiment of FIG. 14,
FIG. 16 is a main part perspective view showing an enlarged view of the connection adjusting frame and the connection adjusting part in the embodiment of FIG. 14,
FIG. 17 is an exploded perspective view of the left connection regulating part in the embodiment of FIG. 16,
FIG. 18 is a perspective view illustrating a process of inserting a horizontal polygonal strut into the right connection adjustment portion in the embodiment of FIG. 16,
FIG. 19 is a perspective view illustrating a process of inserting a horizontal polygonal strut into the left connection adjustment portion in the embodiment of FIG. 17,
20 is a plan view showing a horizontal polygonal strut support structure having a hexagonal structure in a large area ter- minator construction method using the strut support structure according to the present invention,
FIG. 21 is a plan view showing a horizontal polygonal strut support structure having a 20-angular structure in a large-area ter- minator construction method using the strut support structure according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a large area terra cotta construction method using a strut support structure according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 4 to 12, the method of constructing a large area terrarium using the strut support structure according to the present invention includes the steps of constructing an outer earth retaining wall (S100), setting an independent boundary surface (S200), constructing an inner earth retaining wall An outer strut girder construction step S400, and an inner strut girder construction step S500.

First, as shown in FIGS. 4 to 6, 9, and 10, the outer earth retaining wall construction step S100 constructs the outer earth retaining wall 110 at the ground interface G1 in the large-area subterranean digging. The outer earth retaining wall 110 is installed outside the area of the ground to prevent the earth from collapsing due to earth pressure. At this time, an order grouting (not shown) for blocking the groundwater must be installed outside the outer earth retaining wall 110. The outer earth retaining wall 110 and the grouting, .

Among these temporary wall construction methods, there are pile clay wall construction method, Soil Cement Wall (SCW) method, Diaphragm Wall method, and CIP (Cast In Place Pile) method. If the method is used, it is sufficient to install the outer earth retaining wall 110 for preventing the collapse of the earth. When the outer earth retaining wall 110 is constructed, an outer strut support structure 111 described later is installed to support the outer earth retaining wall 110 by a horizontal earth pressure so that the outer earth retaining wall 110 is not collapsed.

In the independent boundary surface setting step S200, as shown in FIGS. 4 to 6, 9 and 10, the independent boundary surface G2 is set to a predetermined width inside the ground interface G1. It is difficult to construct a grid-like strut support structure with a straight line in the case of a large area of, for example, 100 × 100 m in width. Therefore, The interface G2 is set. Therefore, the independent area inside the independent boundary surface G2 is separated after leaving the independent area in the independent boundary surface G2 within the range of the ground area.

At this time, since the independent area in the independent boundary surface G2 also generates earth pressure toward the outside, the inner earth retaining wall construction step S300 is performed in order to prevent this. That is, in the inner earth retaining wall construction step S300, as shown in FIGS. 4 to 6, 9 and 10, the inner earth retaining wall 120 is installed on the independent boundary surface G2. Accordingly, it is possible to prevent the soil from collapsing due to the earth pressure through the inner earth retaining wall 120 from the independent area inside the independent boundary surface G2. The inner earth retaining wall 120 is also irrelevant to any of the outer retaining walls 110 as long as it does not use any earth retaining method.

As shown in FIGS. 4 to 6, 9 and 10, the outer strut guarding step S400 is performed while the ground surface area between the ground interface G1 and the free- The outer strut support structure 111 is installed between the earth retaining walls 120. The external earth pressure transmitted from the outer earth retaining wall 110 by the outer strut support structure 111 and the inner earth pressure transmitted from the inner earth retaining wall 120 are transmitted between the ground interface G1 and the independent interface G2, So that the earth pressure can be supported horizontally. When the underground wave gap is completed between the ground interface G1 and the independent interface G2 through the external strut guard application step S400, the independent area in the independent interface G2 is torn away.

That is, as shown in FIGS. 4, 7, 8, 11, and 12, the inner strut guarding step S500 is performed while the inner side of the inner earth retaining wall 120 is inwardly The strut support structure 121 is constructed. An external earth pressure transmitted from the outer earth retaining wall 110 is transmitted to the inner earth retaining wall 120 by the outer strut support structure 111 between the ground interface G1 and the free boundary G2, The structure 121 can transfer the external earth pressure to the external earth retaining wall body 110 in a balanced manner, thereby supporting the entire external earth pressure horizontally. Through the inner strut support step S500, the underground waveguide inside the ground interface G1 including the independent interface G2 is completed.

At this time, the outer strut support structure 111 or the inner strut support structure 121 may be constructed as a grid-like strut support structure 130 of a conventional structure as shown in FIGS. 5 to 8, The horizontal polygonal strut support structure 140, which is another feature of the invention, can be constructed.

That is, the horizontal polygonal strut support structure 140 may be formed of a wale band 200, a post file 300, an outer support beam (not shown), and an outer support beam (not shown) with respect to the outer earth retaining wall 110 or the inner earth retaining wall 120, 400, a foundation strut 500, an inner support beam 600 and a horizontal polygonal strut 700, and may further include a connection regulation frame 800 and a connection regulator 900. The connection adjusting unit 900 may include an angle adjusting member 910, a length adjusting member 920 and a strut connecting member 930. The length adjusting member 920 may include a holding protrusion 921 .

As shown in FIGS. 13 to 15, the wale band 200 is horizontally fixed along the inner surface of the earth retaining wall body 110 (120). The wale band 200 is one of constituent members of the support structure and serves to uniformly receive the earth pressure acting on the earth retaining walls 110 and 120 and to transmit the earth pressure to the foundation strut 500 to be described later. The position of the wale band 200 is determined depending on the excavation depth of the securing walls 110 and 120, but the vertical interval is approximately 2 to 3 m. The wale band 200 should be as close as possible to the retaining walls 110 and 120. If there is a gap therebetween, the wale band 200 should be filled with steel pieces, concrete or mortar to prevent buckling.

Referring to FIGS. 5, 7, 9, and 11, the post files 300 are provided in a plurality of locations as shown in FIGS. 14 and 15, and are located at positions corresponding to respective vertexes of a polygon Respectively. For example, it is designed in a polygonal shape according to the area of the land to be destroyed at the subterranean level, and each of the plurality of postfiles 300 is installed vertically so as to be located at each designed vertex of the polygon. 12, each of the post files 300 is designed to be positioned at a position corresponding to a vertex of a hexagon, that is, a position of a connection control frame 800 Install vertically. In the case where the land area is wide, the post files 300 are designed in a twenty-angular shape as shown in FIG. 13, and each of the post files 300 is vertically installed at a position corresponding to each vertex of a bisecting shape. Since the post file 30 is vertically installed on the foundation struts 500 and the horizontal polygonal struts 700 to be installed in the horizontal direction, the postfiles 30 are independent of the horizontal earth pressure, and each of the struts 500 And supports the struts 500 and 700 while maintaining the weight of the struts 500 and 700 in the horizontal direction.

Firstly, in order to support the base strut 500 horizontally with the post file 300, an outer support beam 400 is required as shown in Figs. 14 and 15. That is, a plurality of outer support beams 400 are fixedly coupled to one surface of each of the post files 300 via the respective outer brackets 410. 13 to 15, one end of each of the foundation struts 500 is connected and fixed to the wedge 200 of the outer earth retaining wall 110 or the inner earth retaining wall 120, Is fixedly coupled to each of the outer support beams (400).

The outer support beam 400 is coupled to the post file 300 through the outer bracket 410 and the outer support beam 400 is coupled to the outer support beam 400 by vertically installing the post files 300 at the vertexes of the hexagonal shape. And the base strut 500 is connected and fixed to the wale band 200. The horizontal earth pressure generated from the earth retaining walls 110 and 120 is transmitted to the foundation struts 500 in a state where the post file 300 is installed with respect to each vertex of the hexagonal shape and finally transmitted to each vertex of the hexagonal shape . The horizontal earth pressure transmitted to the vertexes of the hexagonal shape is dispersed by the horizontal polygonal stratum 700 to be described later to support the horizontal earth pressure of the earth retaining walls 110 and 120.

To support this horizontal polygonal strut 700 horizontally, the inner support beam 600 as shown in Figures 14 and 15 is needed. That is, a plurality of inner support beams 600 are fixedly coupled to the other surfaces of the post files 300 via respective inner brackets 610.

13, 20, and 21, the horizontal polygonal struts 700 are connected in series so as to form a horizontal polygonal shape while drawing a single closed curve on each of the inner support beams 600. In this case, A single closed curve refers to a closed figure having the same starting point and ending point when a point is drawn on a straight line or a curved line such as a polygon, a circle, an ellipse, etc. In the present invention, each horizontal polygonal strut 700 It is a structure that is connected in series.

When the plurality of horizontal polygonal struts 700 have a polygonal shape, it is designed and installed so as to have a regular polygonal shape as shown in FIGS. 13, 20 and 21. This is because, when the same force is applied in the horizontal direction from each vertex of the polygonal shape, it is necessary to design and install the polygonal image so that the same reaction force and the same force are generated in the front and rear direction and the left and right direction.

However, even if a plurality of horizontal polygonal struts 700 are designed to have a regular polygonal shape at the time of designing, it is difficult for each first horizontal polygonal strut 700 to have an accurate constant length (manufacturing error) Or the horizontal polygonal strut 700 (installation error). Accordingly, in order to serially connect the horizontal polygonal strut 700 to form a horizontal polygonal shape, the connection control frame 800 and the connection regulating unit 900 may be further included.

14 to 19, the connection control frame 800 is fixed on each of the inner support beams 600 and the connection control unit 900 is provided with a pair of connection control frames 800, And the connection length and angle of each of the horizontal polygonal struts 700 connected to the right and left sides can be adjusted by connecting each of the pair of horizontal polygonal struts 700 to the right and left.

More precisely, each of the connection regulating portions 900 may include an angle regulating member 910, a length regulating member 920 and a strut connecting member 930 as shown in Figs. 14-19.

One end of the angle regulating member 910 is rotatably coupled to the connection regulating frame 800 with the vertical axis as a center of rotation, and the other end of the angle regulating member 910 is threaded on the cylindrical inner circumferential surface. That is, since the one end of the angle regulating member 910 is rotatably coupled to the connection regulating frame 800, the angle can be adjusted according to the internal angle of the polygonal shape to be designed, and if necessary, So that the horizontal polygonal strut 700 can be connected. The other end of the angle regulating member 910 has a cylindrical shape and a thread is formed on the inner circumferential surface thereof, and the length regulating member 910 is configured to control the length in relation to the length regulating member 920 described later.

That is, the length adjusting member 920 is screwed to the other end of the angle adjusting member 910 such that one end thereof is pulled out from the other end of the angle adjusting member 920. Accordingly, one end of the length adjusting member 920 is drawn in or drawn out from the other end of the angle adjusting member 920 by rotating the length adjusting member 920 in the forward and reverse directions. The length adjusting member 920 is drawn out from the angle adjusting member 910 when the connecting length of the horizontal polygonal strut 700 is not sufficient and when the connecting length of the horizontal polygonal strut 700 is slightly long, 910 to adjust the connection length.

One end of the strut connection member 930 is rotatably coupled to the other end of the length adjusting member 920 in the longitudinal direction and the other end of the strut connection member 930 is connected to one end or the other end of the horizontal polygonal strut 700 Lt; / RTI > In other words, the length adjusting member 920 is rotated in the longitudinal direction to rotate in the forward and reverse directions, and is engaged or disengaged with the angle adjusting member 910 so that one end of the strut connecting member 930 is connected to the length adjusting member 920, And to be free to rotate in a state of being rotatably coupled with the longitudinal direction. In addition, the other end of the strut connecting member 930 has a structure to be inserted and joined so as to be connected to the horizontal polygonal strut 700. For example, when the horizontal polygonal strut 700 is an 'I' or 'H' shaped steel as shown in the drawing, one end or the other end of the horizontal polygonal strut 700 is inserted into the other end of the strut connecting member 930 '[]', Which is a corresponding cross-sectional shape to be combined and joined together. In addition, when the horizontal polygonal strut 700 is hollow or solid circular, annular, or rectangular, it may also be a larger or smaller circular or annular shape having a corresponding cross-sectional shape such that it can be inserted into the other end of the strut connection member 930 Square shape or the like.

The length adjusting member 920 is installed to be able to move in and out of the angle adjusting member 910 while rotating in the forward and reverse directions. That is, it is necessary to allow the operator to grasp the hand to rotate the length adjusting member 920. To this end, as shown in FIGS. 14 to 19, the length adjusting member 920 may include a plurality of holding protrusions 921 radially protruding from the outer circumferential surface. Therefore, when the operator grips the holding protrusion 921 and rotates or rotates the length adjusting member 920 forward or backward, the length adjusting member 920 is pulled in or pulled out from the angle adjusting member 910 to form the strut connecting member 930 The connection length of the horizontal polygonal strut 700 connected to the horizontal polygonal strut 700 can be adjusted.

As described above, in the method of constructing the large-area terra firma using the strut support structure according to the present invention, a separate independent boundary surface G2 is set in the ground area when the large- And the inner earth retaining wall 120 is installed on the independent boundary surface G2 independently from the inner boundary wall G2 so that the strut guarding method can be used even for a large area underground wave.

Particularly, it is possible to secure a wide working space through a plurality of horizontal polygonal struts 700 connected in series so as to form a horizontal polygonal shape while forming a single closed curve at the time of construction of the strut support structure, It is possible to correct the design and installation error through the unit 900, and it can be adjusted to various sizes according to the area of the ground, so that it can be applied to various construction sites and is easy to carry, store and assemble .

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art will be able to modify the technical idea of the present invention in various forms. Accordingly, such improvements and modifications will fall within the scope of the present invention as long as they are obvious to those skilled in the art.

G1: Ground interface
G2: Independent interface
110: outer retaining wall 111: outer strut support structure
120: Inner earth retaining wall 121: Inner strut support structure
130: Grid-type strut support structure
140: Horizontal polygonal strut support structure
200: Wale
300: Post file
400: outer support beam 410: outer bracket
500: foundation strut
600: Inner support beam 610: Inner bracket
700: Horizontal polygonal strut
800: Connection adjustment frame
900: connection adjusting portion 910: angle adjusting member
920: length adjusting member 921: gripping projection
930: Strut connecting member
S100: Construction step of outer wall
S200: Independent interface setting step
S300: Construction step of inner side earth retaining wall
S400: outer strut girder construction step
S500: Inner strut girder construction step

Claims (7)

An outer boundary wall construction step of constructing an outer boundary wall at a ground boundary when a large area is destroyed, an independent boundary surface setting step of setting an independent boundary surface to a predetermined width inside the boundary boundary surface, An outer strut support structure for constructing an outer strut support structure between the outer earth retaining wall and the inner earth retaining wall while excavating a site area between the ground interface and the free boundary surface; And an inner strut support structure step of constructing an inner strut support structure inside the inner earth retaining wall while subverting the independent area inside the interface,
The outer strut support structure or the inner strut support structure,
Horizontal polygonal strut support structure,
The horizontal polygonal strut support structure includes:
A plurality of post files vertically arranged at positions corresponding to respective vertexes of a polygon designed in advance within the ground area or the independent area; and a plurality of postfiles each of which is fixedly coupled to one surface of each of the postfiles through respective outer brackets An outer support beam and a plurality of foundation struts each having one end connected and fixed to the outer earth retaining wall or the wedge of the inner earth retaining wall and the other end fixedly connected to each of the outer support beams, A plurality of inner support beams fixedly coupled to the other surface through respective inner brackets; and a plurality of horizontal polygonal struts connected in series so as to form a horizontal polygonal image while forming a single closed curve on each of the inner support beams,
A connection adjustment frame fixedly installed on each of the inner support beams,
Further comprising a pair of connection adjusting portions which are respectively installed on the left and right sides of the connection adjusting frame and which connect the pair of horizontal polygonal struts to each other and can adjust the connection length and angle of each of the horizontal polygonal struts connected to the left and right, ,
Each of the connection regulating portions includes:
An angle adjusting member having one end rotatably coupled to the connection adjusting frame with a vertical axis as a center of rotation and the other end threaded on a cylindrical inner circumferential surface,
A length adjusting member screwed to the other end of the angle adjusting member so that one end thereof is pulled out from the other end of the angle adjusting member,
And one end of the strut connecting member is rotatably coupled to the other end of the length adjusting member in the longitudinal direction and the other end of the strut connecting member is inserted and coupled so as to be engaged with one end or the other end of the horizontal poly- Construction method of large area terrager using strut support structure.
delete delete The method according to claim 1,
Each of the horizontal polygonal struts comprises:
Wherein the first and second struts are connected to each other so as to have a regular polygonal shape.
delete delete The method according to claim 1,
The length-
And a plurality of grasping projections formed radially on the outer circumferential surface of the strut support structure.

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