KR20210141042A - Pillar for retaining wall, structre of retaining wall and construction method of retaining wall using thereof - Google Patents

Abstract

The present invention relates to an H-pile for a retaining wall, and a retaining wall structure and a retaining wall construction method using the same, and an H-pile for a retaining wall according to the present invention comprises a plurality of pillars that are coupled with webs thereof facing each other so as to slide in the longitudinal direction, wherein one or more panel sliding grooves extending in the longitudinal direction are formed on each side surface of each pillar. Accordingly, the H-pile for a retaining wall can be applied to various field conditions and also allows an earth plate located at the bottom to be dismantled first, thereby facilitating the dismantling and reuse of the earth plate.

Description

Thumb pile for retaining, retaining structure and retaining construction method using the same

The present invention relates to a thumb stake for retaining, a retaining structure using the same, and a retaining construction method, and more particularly, to a retaining thumb stake that can be formed to various depths and is easy to construct and dismantle, a retaining structure using the same, and It relates to the construction method of the earthen curtain.

Retaining membrane is a temporary structure constructed to prevent the surrounding ground from subsidence or collapse when excavating the ground. It consists of an earth plate (B) that prevents the soil from collapsing toward the work space by filling the space between the thumb piles by stacking up and down between the piles.

The earth plate constituting the retaining wall is constructed sequentially from the bottom to form a wall. In order to dismantle such a wall, the earth plate must be removed sequentially from the top. In many cases, even if the earth plate is removed, since the earth plate is usually made of wood, it is often damaged during the removal process, so it is difficult to reuse it.

As one of the prior art for solving this problem, there is a 'slide rail type retaining device' of registration number 20-0389266. In the prior art, by forming an inner rail groove and an outer rail groove each extending in the longitudinal direction on the slide rail serving as a thumb pile, and inserting the base earth plate into each rail groove one by one, the base earth plate located at the bottom first made it possible to remove it.

However, these slide rails have a complex shape compared to I-beams that are generally used as thumb piles, so it is not easy to manufacture them in various sizes, and thus it is difficult to apply them to various field conditions.

US 20-0389266 Y1

Accordingly, an object of the present invention is to solve such a problem in the prior art, and it is possible to dismantle the earth plate located at the bottom while being applicable to various field conditions, thereby facilitating the dismantling and reuse of the earth plate. , to provide a retaining structure and a retaining construction method using the same.

The problem to be solved by the present invention is not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

The above object, according to the present invention, is made of a plurality of struts that each other's webs face each other and are slidably coupled in the longitudinal direction, and at least one panel sliding groove extending along the longitudinal direction on each side of each strut is provided. It is achieved by a thumb stake for retaining characterized in that it is formed.

The two posts may be provided, and two panel sliding grooves may be formed on each side of one of the two posts, and one panel sliding groove may be formed on each side of the other one.

A coupling rail groove member having a coupling rail groove extending along the longitudinal direction of the post is formed on one of the webs facing each other in the plurality of posts, and a coupling rail inserted into the coupling rail groove is formed on the other one of the posts. It may be formed to extend along the longitudinal direction of the.

A plurality of first fixing holes extending along a direction crossing the longitudinal direction of the post are formed in the coupling rail groove member to be spaced apart from each other in the longitudinal direction of the post, and the coupling rail has a direction crossing the longitudinal direction of the post. A plurality of second fixing holes extending along are formed to be spaced apart in the longitudinal direction of the support, and the thumb stake for retaining use of the present invention is at least one of the plurality of first fixing holes and at least one of the plurality of second fixing holes. It may further include a limit pin fastened through one.

One side of the web of the post may be provided with a rail for support beams extending along the longitudinal direction.

The coupling rail groove member may be detachably coupled to the post.

According to another embodiment of the present invention, at least two of the above-described thumb stakes for retaining are erected to be spaced apart from each other along the circumference of the working space, and at least two in each space between the adjacent thumb stakes for retaining the end as being disposed. includes a panel inserted and fixed into the panel sliding groove, and in each of the thumb stakes for retaining, the one located at the lower part of the plurality of posts is located in the inner direction of the working space rather than the upper one, and a plurality of the panels A retaining structure is provided, characterized in that it is inserted into the panel sliding groove formed in the inner direction of the working space than the one located in the lower part of the upper part.

The retaining structure of the present invention may further include a beotimbo disposed between the retaining thumb stakes facing each other.

According to another embodiment of the present invention, the preparation soil digging step of excavating the ground of a predetermined depth in the working space; A plurality of the above-mentioned thumb stakes for retaining are arranged to be spaced apart from each other along the circumference of the work space and installed such that one panel is disposed in each space between the adjacent thumb stakes for retaining, but in each of the thumb stakes for retaining, a plurality of the holdings are The first main construction step of installing the lower end in contact with each other; an additional panel installation step of arranging one more panel in each space between the thumb stakes for retaining; And while further excavating the ground in the working space, the second main construction step of sliding down those located in the inner direction of the work space among the plurality of posts and sliding those located in the inner direction of the work space among the plurality of panels to the bottom ; There is provided a retaining construction method comprising a.

In the first main construction step, but arrange a beotimbo between the thumb stakes for retaining facing each other, the beotimbo may be connected to one located in the inner direction of the working space among the plurality of posts.

The beotimbo is connected to the thumb stakes for retaining before the first main construction step, and may be installed together with the thumb stakes for retaining in the first main construction step.

The retaining construction method according to the present invention is to be carried out after the second main construction step, and a secondary brace is placed between the thumb stakes for retaining facing each other, but the secondary brace is a plurality of the holdings in the outer direction of the working space. It may further include a secondary brace installation step to be connected to the location.

Thumb piles for retaining according to the present invention can be used to construct underground structures of various sizes.

And it is possible to remove from the panel located at the lower end of the retainer constructed by the thumb pile for retaining according to the present invention. Accordingly, there is no need to lay down the nell, so the dismantled panel can be reused, and the ground can be stably supported continuously during the construction of the underground structure.

1 is an explanatory view of a conventional retaining wall;
2 is a perspective view of a thumb stake for retaining according to the present invention;
3 is a perspective view of a state in which the thumb stake for retaining according to the present invention is constructed;
4 is a cross-sectional view and a partial perspective view of a thumb pile for retaining according to the present invention;
5 is an explanatory view of the limit pin constituting the thumb pile for retaining according to the present invention;
Figure 6 is an explanatory view of a rail for a brace constituting a thumb pile for retaining according to the present invention;
7 is a perspective view of a retaining structure according to the present invention;
8 is a flowchart related to a retaining construction method according to the present invention;
9 is an explanatory view of the first main construction step constituting the retaining construction method according to the present invention;
10 is an explanatory view of the member arrangement step constituting the retaining construction method according to the present invention;
11 is an explanatory view of the secondary main construction step constituting the retaining construction method according to the present invention;
12 is an explanatory view of a state in which the construction of the retaining wall is completed by the retaining construction method according to the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

Figure 2 is a perspective view of the thumb stake (1) for retaining according to the present invention is shown.

Thumb stakes (1) for retaining according to the present invention is made of a plurality of posts (10). Hereinafter, a description will be given mainly of the case in which the thumb pile 1 for retaining according to the present invention consists of two posts 10, but the thumb pile 1 for retaining according to the present invention consists of three or more posts 10. Cases are not excluded from the scope of rights.

A plurality of posts 10 are arranged so that each other's webs (W) face each other, and are coupled to be slidable in the longitudinal direction of each post (10). Accordingly, while one post 10 constituting the thumb pile 1 for retaining according to the present invention slides with respect to the other post 10, the length of the thumb pile 1 for retaining according to the present invention is adjusted. possible.

One or more panel sliding grooves 11 extending along the longitudinal direction of the posts 10 are formed on each of both sides of each post 10 . The end of the panel 2 serving as an earth plate in the retaining wall is inserted into the panel sliding groove 11 so that the panel 2 can be fixed to the post 10 . Here, the side of the post 10 refers to the outer surface of the flange (F) positioned perpendicular to the web (W).

In FIG. 2, for example, two panel sliding grooves 11 are formed on each side of one post 10 among the two posts 10, and one panel sliding groove on each side of the other post 10 ( 11) can be seen. When the two panel sliding grooves 11 are formed on one side of the post 10, the panel sliding grooves 11 are positioned to be spaced apart from each other in the width direction of the side. Since two panels 2 can be inserted up and down, one in each panel sliding groove 11, in the strut 10 having two panel sliding grooves 11 on each side, these poles 10 are mounted on each side. It is preferable to be formed longer than the support post (10) having one panel sliding groove (11).

The thumb pile 1 for retaining according to the present invention can be used to construct underground structures of various sizes. That is, the length of the retaining thumb pile (1) according to the present invention can be adjusted according to the depth at which the underground structure is formed. Therefore, there is no need to manufacture the thumb stakes (1) for retaining according to the standard.

And as shown in FIG. 3, in the lower part of a plurality of panels (2) positioned up and down between adjacent thumb stakes (1) for retaining during construction of retaining using the thumb stake (1) for retaining according to the present invention. By inserting it into the panel sliding groove 11 formed in the inner direction of the work space (S) rather than being located on the upper part, it is possible to easily remove the panel 2 while stably maintaining the ground when dismantling the retaining wall. . That is, each of the panel sliding grooves 11 does not overlap each other up and down, and the panels 2 are inserted one by one from the inner direction of the working space for these panel sliding grooves 11 and removed from the panel 2 located below. It is also possible to dismantle the retaining wall by removing it from the lower panel (2) of the retaining wall while backfilling from the lower end of the work space, and the panel (2) at the upper end of the retaining wall that has not been removed is still supporting the earth pressure. There is no fear of the soil collapsing into parts. Compared to the existing earth retaining plate that cannot be removed from the lower part, the earth retaining plate (1) according to the present invention risks the ground collapsing and removes the earth plate from the upper part or leaves it without removing the earth plate. Since there is no need to lay down the panel 2, the dismantled panel 2 can be reused, and the ground can be stably supported continuously during the construction of the underground structure.

In order to be inserted into the panel sliding groove 11 formed in the inner direction of the work space than the one located at the lower part of the plurality of panels 2, the plurality of posts 10 constituting the thumb pile 1 for retaining ), the one located in the lower part should be arranged so that it is located in the inner direction of the work space than the one located in the upper part.

For reference, the 'working space (S)' refers to a part in which soil is dug to form an underground structure, and may be in a state filled with soil or may be empty due to removal of soil depending on the operation process.

The thumb pile (1) for retaining according to the present invention can also be easily manufactured using an existing section steel member manufactured to have one or two panel sliding grooves.

The thumb pile 1 for retaining according to the present invention is provided with a coupling rail groove member 12a and a coupling rail 12b so that the posts 10 can be slidably coupled. 4 is an explanatory view of the coupling rail groove member (12a) and the coupling rail (12b) is shown.

The coupling rail groove member (12a) is formed on one of the webs (W) facing each other in the plurality of posts (10) and the coupling rail (12b) is formed on the other one. The coupling rail groove member 12a may be made of, for example, two 'L'-shaped steels joined so that the surface forming the thickness is in contact with the surface of the web (W). The two 'L'-shaped steels are joined to the web (W) so that each longitudinal direction is parallel to the longitudinal direction of the pole 10 in a state facing each other, and the cross-section is approximately 'ㅗ'-shaped, and the pole 10 A coupling rail groove (g) extending along the longitudinal direction is formed. And the coupling rail (12b) is formed in a cross section of approximately 'X' shape to engage with the coupling rail groove (g) and extending along the longitudinal direction of the post (10).

The coupling rail 12b formed on one post 10 is inserted into the coupling rail groove g formed on the other post 10 so that the posts 10 can be coupled to each other, and the coupling rail 12b is the coupling rail groove ( g) by moving along one post 10 can be slid relative to the other post (10).

The coupling rail groove member 12a may be detachably coupled to the post 10 .

In this case, it is possible to use the post 10 in various conditions. That is, the post 10 in a state in which the coupling rail groove member 12a is coupled can be used as a member constituting the thumb pile for retaining use of the present invention by being coupled to another post, and the coupling rail recess member 12a is coupled thereto. The non-existent post 10 may be a thumb stake of a retaining wall for an underground structure that is not deep with a single post alone.

And after constructing and dismantling the retaining retainer with the retaining thumb stakes including the retaining posts 10 in a state in which the coupling rail groove member 12a is coupled, the respective posts 10 are separated and the combined rails from the posts 10 It is also possible to separate the groove member (12a) and reuse it in the construction of a retaining wall for an underground structure that is not deep.

Thumb pile 1 for retaining according to the present invention further includes a limit pin 12c, wherein the coupling rail groove member 12a has a plurality of first fixing holes spaced apart from each other in the longitudinal direction of the post 10 ( h1) is formed, and a plurality of second fixing holes (not shown) arranged to be spaced apart from each other in the longitudinal direction of the post 10 may be formed in the coupling rail 12b. The first fixing hole h1 and the second fixing hole extend along a direction crossing the longitudinal direction of the post 10 , respectively.

The limit pin 12c is fastened through at least one of the plurality of first fixing holes h1 and at least one of the plurality of second fixing holes as shown in FIG. 10) can be fixed to prevent sliding.

The first fixing hole (h1) and the second fixing hole are formed in a direction parallel to the width of the web (W) among the directions intersecting the longitudinal direction of the post 10, to facilitate the insertion operation of the limit pin (12c) It is preferable in terms of

The first fixing hole h1 is formed of a plurality of pieces of each 'L'-shaped steel constituting the coupling rail groove member 12a as shown in FIG. It can be formed by arranging to be spaced apart from each other with a slight gap in the longitudinal direction.

The panel sliding groove 11 is formed to protrude from the side surface of each post 10 , and has a 'L'-shaped or 'TT'-shaped cross-section and may be made of a member extending along the longitudinal direction of the post 10 . When one panel sliding groove 11 is formed on each side of the post 10, two 'L'-shaped members are formed to face each other, and one panel sliding groove 11 having an approximately 'ㅗ'-shaped cross-section is formed. Can be formed, and when two panel sliding grooves 11 are formed on each side of the post 10, two 'a'-shaped members facing each other and 'ㅜ' disposed between the 'a'-shaped members Two panel sliding grooves 11 having an approximately 'ㅗ'-shaped cross section can be formed side by side by the 'character member.

The width direction end of the web (W) may form a part of the 'L'-shaped member forming the panel sliding groove (11).

The cross-sectional shape of the end of the panel 2 may be approximately 'TT' or 'ㅠ' so that it can be inserted into the panel sliding groove 11 having an approximately 'ㅗ' shape in cross section.

One side of the web (W) of each post (10) may be provided with a support rail 13 extending along the longitudinal direction of the post (10). 6 is an explanatory view of the rail 13 for braces is shown.

Beotimbo (3) is disposed between the thumb stakes for retaining (1) facing across the working space (S) can increase the earth pressure bearing capacity of the thumb stakes for retaining (1). The rail 13 for braces is used to fix the braces 3 to the thumb stakes 1 for retaining.

The rail 13 for braces is formed on the web (W) that will face the work space when the thumb stake (1) for retaining is installed in the field, for example, the cross section is made of a 'TT' type or 'ㅠ' type, It extends along the longitudinal direction of the post (10). A 'ㅗ'-shaped groove (g2) of a shape that engages with the rail 13 for such a brace is formed at the longitudinal end of the brace (3), and the rail 13 for braces is inserted into the groove of the brace (3). (3) may be coupled to the thumb stake (1) for retaining. And the beotimbo (3) can be positioned on the longitudinal direction of the thumb pile (1) for retaining while sliding along the rail 13 for the beotimbo.

A plurality of third fixing holes (not shown) extending along a direction crossing the longitudinal direction of the post 10 are formed spaced apart in the longitudinal direction of the post 10 at the longitudinal end of the support beam 3, and the rail for the support beam In (13), a plurality of fourth fixing holes (not shown) extending along a direction intersecting with the longitudinal direction of the pole 10 are formed spaced apart in the longitudinal direction of the pole 10, at this time for retaining use according to the present invention Thumb stake (1) may be provided with a limit pin (not shown) for the brace. The limit pin for the brace is fastened through at least one of the plurality of third fixing holes and at least one of the plurality of fourth fixing holes so that the brace 3 does not move with respect to the thumb pile 1 for retaining It can be fixed. .

The coupling rail 12b used for coupling between the posts 10 may also serve as the rail 13 for braces.

Each post 10 may have an inclined bottom surface so as to be easily press-fitted into the ground, so that the lower end may have a sharp shape.

Hereinafter, the retaining structure using the thumb stake (1) for retaining of the present invention will be described. 7 is a perspective view of the retaining structure according to the present invention is shown.

While describing the retaining structure of the present invention, detailed descriptions of the parts mentioned in the description of the retaining thumb pile (1) may be omitted.

The retaining structure according to the present invention comprises a plurality of retaining thumb stakes (1) and a plurality of panels (2).

Thumb stakes for retaining (1) are built to be spaced apart from each other along the circumference of the working space (S). Thumb piles for retaining (1) may use a different number of poles 10 or the number of panel sliding grooves 11 formed on each pole 10 depending on the depth of the underground structure. 7 exemplarily, a thumb for retaining comprising one post (10) having one panel sliding groove (11) on each side and one post (10) having two panel sliding grooves (11) on each side. It can be seen that the pile 1 is used.

At least two panels (2) are arranged up and down in each space between the adjacent thumb stakes (1) for retaining, and the ends are inserted into the panel sliding grooves (11) and fixed to the thumb stakes (1) for retaining. . In FIG. 7 , it can be seen that each of the thumb stakes 1 for retaining is provided with three panel sliding grooves 11 on each side, so that three panels 2 are arranged up and down.

In each of the thumb stakes (1) for retaining, those located at the lower part of the plurality of posts (10) are located in the inner direction of the work space rather than those located at the upper part, and those located in the lower part of the plurality of panels (2) are located at the upper part It is inserted into the panel sliding groove 11 formed in the inner direction of the working space.

Accordingly, the panels 2 do not overlap each other up and down, but are arranged so as to approach the inner direction of the working space as they go down, and when the underground structure is constructed in the working space and then the retaining wall is dismantled, the panel 2 located at the bottom It is possible to remove from

In FIG. 7, the length of the holding posts 10 overlapping is made as short as possible to make the length of the thumb stake 1 for retaining as long as possible, and the retaining structure in a state in which the panel 2 is inserted into all the panel sliding grooves 11 is shown. However, unlike this, it is also possible to form a retaining structure having a height of about two panels (2) by shortening the length of the thumb stake (1) for retaining by making the length at which the posts (10) overlap longer.

The retaining structure according to the present invention may further include a beotimbo (3). Beotimbo (3) is arranged between the thumb stakes for retaining (1) facing each other across the working space to increase the earth pressure bearing capacity of the thumb stakes for retaining (1). The braces 3 may be more specifically fixed to the rails 13 for the braces formed on the web W facing the inside of the working space in the post 10 .

Beotimbo (3) may be provided for each post (10) to support each post (10) constituting the thumb pile (1) for retaining, and the lower post (10) on which earth pressure acts larger is upper and lower It can be supported by a plurality of braces (3) positioned as

When the number of panel sliding grooves 11 formed on each pillar 10 constituting one retaining pile 1 is different, the holding 10 having a larger number of panel sliding grooves 11 is located at the bottom. can be located The post 10 having a larger number of panel sliding grooves 11 is formed to have a larger side width, so it can exhibit a relatively large earth pressure bearing force, and as the earth pressure increases toward the lower end of the retaining wall, a larger number of panel sliding It is preferable that the post 10 having the groove 11 is located in the lower part.

Hereinafter, a retaining method according to the present invention will be described. 8 is a flowchart of a retaining construction method according to the present invention.

The retaining construction method according to the present invention comprises a preparation soil digging step (S10), a first main construction step (S20), an additional panel installation step (S30), and a second main construction step (S40).

In the preparation soil digging step (S10), the ground of a predetermined depth is excavated in the working space (S). In the preparation soil digging step (S10), the ground is excavated to a depth that does not collapse without a separate support means.

In the first main construction step (S20), as shown in Figure 9, a plurality of thumb stakes for retaining (1) are arranged to be spaced apart from each other along the perimeter of the excavated work space (S), and thumb stakes for retaining ( 1) Place one panel (2) in each of the interspaces. At this time, in each of the retaining thumbs, a plurality of posts 10 are installed so that their lower ends are in contact with each other, that is, the lower ends of each post 10 are located at the same depth. And the panels (2) are also installed so that the lower end is located at the same depth as the lower end of each post (10). The panel 2 is disposed in the panel sliding groove 11 located in the outermost direction of the work space.

The first main construction step (S20) may be more specifically composed of a member arrangement step (S21) and a first press-fitting step (S22).

In the member arrangement step (S21), as shown in FIG. 10, the thumb stakes 1 and the panel 2 are arranged along the perimeter of the excavated work space. In the member arrangement step (S21), the lower end of the panel 2 is positioned below the ground plane and the upper end is positioned above the ground plane. That is, in the preparation soil digging step (S10), the ground may be excavated to a depth smaller than the height of the panel (2).

In the first press-fitting step (S22), while excavating the ground little by little, the thumb pile 1 and the panel 2 for retaining are moved downward. This operation proceeds until the upper end of the post 10 located at the outermost side of the work space among the posts 10 of the thumb pile 1 for retaining, as shown in FIG. 9 coincides with the ground surface. Even if the ground is excavated deeper, the excavation surface of the ground does not collapse because it is supported by the panel 2 that moves downward according to the depth of excavation.

In the member arrangement step (S21), it facilitates the installation of the thumb pile (1) for retaining, and when the first press-fitting step (S22) proceeds, the retainers (10) constituting the thumb pile (1) for retaining can move together. The posts 10 constituting the thumb pile 1 for use may be restricted from sliding between each other by the limit pins 12c, and the limit pins 12c may be removed after the first press-fitting step (S22) is completed.

In the additional panel installation step (S30), the panels 2 are further arranged one by one in the space between the thumb stakes 1 for retaining. In the panel additional installation step (S30), the panel (2) is located adjacent to the inside of the panel sliding groove (11) in which the panel (2) installed in the first main construction step (S20) is disposed. are placed

In the second main construction step (S40), as shown in FIG. 11, while further excavating the ground in the working space, the plurality of posts 10 located in the inner direction of the working space slide downward and a plurality of panels (2) Slide the one located in the inner direction of the middle working space downward.

As only the inner support 10 of the thumb stake 1 for retaining moves downward, the length of the thumb stake 1 for retaining increases, so it is possible to form the retaining wall to a deeper position.

The second main construction step (S40) may be performed until the upper end of the panel 2 located in the inner direction of the working space moves to a depth of the lower end of the panel 2 located in the outer direction of the work space.

In the second main construction step (S40), the post 10 and the panel 2 located outside the working space are supported by the excavation surface of the ground, so that the position can be fixed without moving downward. The panel 2 positioned outside the working space may be fixed to the post 10 positioned outside the working space by a separate fixing means.

When the thumb stake (1) for retaining is provided with three or more panel sliding grooves 11 on each side, after the second main construction step (S40), the panel additional installation step (S30) and the second main construction step (S40) Similar operations can be performed again.

For example, the thumb stake (1) for retaining is made of two posts (10), the posts (10) outside the working space are provided with one panel sliding groove (11) on each side, and the posts (10) inside the working space ) is provided with two panel sliding grooves 11 on each side, after the second main construction step (S40), the panel sliding groove 11 located inside the working space from the post 10 inside the working space. While additionally disposing the panel 2 and excavating the ground further, the post 10 and the newly added panel 2 inside the working space slide downward.

This repeating operation proceeds until the upper end of the lowermost panel 2 moves to the depth of the lower end of the panel 2 located immediately above, as shown in FIG. 12 . It is preferable in terms of preventing the panels 2 from overlapping in the thickness direction to maintain a state in which at least some sections of the posts 10 overlap each other even after the repetitive operation is completed.

Depending on the size of the underground structure, the retainer can be connected and installed in a continuous position with the work space where the retainer is installed. That is, after the completion of the second main construction step (S40), the prepared soil digging step (S10), the first main construction step (S20), the additional panel installation step (S30) and the second main construction step (S40) next to the pre-installed retaining wall ) and so on.

In the first main construction step (S20), in addition to the thumb stakes (1) and the panel (2) for retaining, the braces (3) may be further installed. Beotimbo (3) is disposed between the thumb stakes (1) for retaining facing each other across the work space, among the posts (10) of the thumb stakes for retaining (1) It is connected to the one located in the inner direction of the work space.

This beotimbo (3) increases the earth pressure bearing capacity of the thumb stake (1) for retaining by pushing the thumb pile (1) for retaining in the opposite direction to the earth pressure.

Beotimbo (3) is connected to the thumb stake (1) for retaining before the first main construction step (S20), it may be installed together with the thumb stake (1) for retaining in the first main construction step (S20). That is, before the first main construction step (S20), two opposing thumb stakes (1) for retaining are assembled in a form in which one retainer (3) is connected, and thumb stakes for retaining (1) and retainer (3) are assembled, By installing them together in the first main construction step (S20), it is possible to easily hold the position of the thumb stake (1) for retaining in the work space.

Beotimbo 3 may be fixed or moved on the post 10 inside the working space according to the progress of the first main construction step (S20) and the second main construction step (S40). More specifically, when the earth pressure acts only on the lower end of the thumb pile 1 for retaining because the depth of excavation is not large, the brace 3 is fixed at the position of the lower end of the post 10 inside the working space, and the depth of excavation becomes deeper for retaining When earth pressure acts on the entire length of the thumb pile (1), the position of the brace (3) can be adjusted while sliding the brace (3) on the inside post (10) of the working space. Alternatively, depending on the size of the earth pressure acting on the thumb pile (1) for retaining, it is also possible to additionally install the support beam (3) at the upper end of the holding space inside the work space (10).

After the second main construction step (S40), the second supportive beam installation step may be further progressed. In the secondary brace installation step, the secondary braces (4) are placed between the thumb stakes (1) for retaining facing each other. The secondary support beam (4) is installed on the one located in the outer direction of the work space among the plurality of posts (10) constituting the thumb pile (1) for retaining.

In the second main construction step (S40), the post 10 located inside the working space slides downward to shorten the overlapping length of the posts 10 constituting the thumb pile 1 for retaining, so the brace (3) ) in a state not supported by the pole 10 , that is, the pole 10 outside the working space may have a weak earth pressure bearing force. Therefore, it is preferable to install a separate secondary brace (4) on the outside strut 10 of the working space to reinforce the earth pressure bearing force of the strut 10 outside the working space.

The scope of the present invention is not limited to the above-described embodiments, but may be implemented in various forms of embodiments within the scope of the appended claims. Without departing from the gist of the present invention claimed in the claims, it is considered to be within the scope of the claims of the present invention to various extents that can be modified by any person skilled in the art to which the invention pertains.

1 : Thumb stake for retaining 2 : Panel
3: braces 4: secondary braces
10: post 11: panel sliding groove
12a: combined rail groove member 12b: combined rail
12c: limit pin 13: rail for braces
g: coupling rail groove h1: first fixing hole

Claims (6)

It consists of a plurality of posts that are slidably coupled to each other's webs in the longitudinal direction,
Thumb stakes for retaining, characterized in that one or more panel sliding grooves extending along the longitudinal direction are formed on each side of each of the posts. According to claim 1,
The holder is provided with two,
Thumb pile for retaining, characterized in that two panel sliding grooves are formed on each side of one of the two posts, and one panel sliding groove is formed on each side of the other one. According to claim 1,
A coupling rail groove member having a coupling rail groove extending along the longitudinal direction of the post is formed on one of the webs facing each other in the plurality of posts, and the coupling rail inserted into the coupling rail recess is formed in the other one of the posts. Thumb stakes for retaining, characterized in that it is formed extending along the longitudinal direction of the. 4. The method of claim 3,
A plurality of first fixing holes extending along a direction crossing the longitudinal direction of the post are formed in the coupling rail groove member to be spaced apart from each other in the longitudinal direction of the post;
A plurality of second fixing holes extending along a direction crossing the longitudinal direction of the post are formed in the coupling rail to be spaced apart from each other in the longitudinal direction of the post,
Thumb pile for retaining, characterized in that it further comprises a limit pin fastened through at least one of the plurality of first fixing holes and at least one of the plurality of second fixing holes. A plurality of retaining thumb stakes according to any one of claims 1 to 4, which are spaced apart from each other along the circumference of the working space, and at least two in each space between the adjacent retaining thumb stakes. and a panel having an end inserted into the panel sliding groove and fixed,
In each of the thumb stakes for retaining, those located in the lower part of the plurality of posts are located in the inner direction of the working space than those located in the upper part,
A retaining structure, characterized in that the one located in the lower part of the plurality of panels is inserted into the sliding groove of the panel formed in the inner direction of the working space than the one located in the upper part. Preparation soil excavation step of excavating the ground of a predetermined depth in the working space;
A plurality of thumb stakes for retaining according to any one of claims 1 to 4 are arranged to be spaced apart from each other along the circumference of the work space, and installed such that one panel is arranged in each space between the adjacent thumb stakes for retaining; A first main construction step of installing a plurality of the posts in each of the thumb piles for retaining so that the lower ends are in contact with each other;
an additional panel installation step of arranging one more panel in each space between the thumb stakes for retaining; and
While further excavating the ground in the working space, the second main construction step of sliding downward the plurality of posts located in the working space inward direction and sliding the plurality of panels in the working space inward direction downward; Retaining construction method comprising a.

Images