KR101218825B1 - Method of land-side protection wall using bracing - Google Patents

Abstract

The present invention relates to a self-supporting retaining method using bracing, and more specifically, excavating a circumference of an excavation area to form an open cut, and incorporating a plurality of thumb piles along both sides of the ground formed by the open cut. And forming a mud structure by connecting horizontal or inclined bracing, or both, to the thumb pile, and forming a foundation by excavating the excavation area. By introducing a self-supporting retaining structure in which horizontal and inclined bracing are mutually combined, the member force and displacement are significantly lowered compared to the existing method, so that even when the same ground conditions and loads are applied, sufficient stability of the member itself can be secured. In addition, it is possible to secure a sufficient working space by not using the supporting materials (struts, earth anchors, rakers, etc.) used in the existing construction method, and to shorten the overall air by reducing the working time for its installation by not using the supporting materials. It is possible, and furthermore, to propose a self-supporting mud-blocking method using bracing, which can promote economic efficiency since there is no need to introduce an additional member to reinforce the stability of the mud-guard structure.

Description

METHOD OF LAND-SIDE PROTECTION WALL USING BRACING}

The present invention introduces a self-supporting retaining structure in which horizontal and inclined bracing are mutually coupled to the top of the pile and the thumb piles joined in two rows while maintaining a constant width to resist the displacement of the retaining wall by earth pressure with the axial force of the top bracing of the pile , By reducing the member force and displacement significantly compared to the existing construction method, it is possible to secure the stability of the member itself. In addition, it does not use the support materials (Strut, Earth Anchor, Raker, etc.) used in the existing construction method to secure sufficient working space for the basement construction. It is possible to shorten the overall air by reducing the working time for its installation by not using support materials, and furthermore, there is no need to introduce additional members to reinforce the stability of the mudguard structure. It relates to a self-supporting self-supporting mudguard method.

The thumb pile mud construction method is a kind of an open-type mud construction method, which is inserted by inserting the thumb pile (H-Pile) at regular intervals or by inserting it after drilling. It refers to a method of inserting to form a wall, and the thumb pile earth plate method, sheet pile method, SCW, CIP, etc. are applicable.

In addition, among the conventional mud construction methods, the construction of the mud structure by the thumb pile earth plate construction method is a plurality of thumb piles (H beams) vertically installed to face each other and the groove portions inserted into the grooves, so that the rear soil piles collapsing toward the front. It is constituted by the earth plate to prevent it from losing.

In addition, a wood plate or a steel plate of a predetermined standard is used as the earth plate, and it is common to adopt a structure in which a wall is formed by laminating it and a fitting tree (wedge) is installed to fix the stacked earth plate.

Patent registration No. 10-0831332 (2008.05.15. registration, hereinafter referred to as "Prior Art 1") as such a conventional mud construction method "Underground mud wall for civil engineering works and construction method thereof" and published patent No. 10-2009- 0091473 (2009.08.28. Published, hereinafter referred to as "Prior Art 2") "The construction method of a two-column thumb pile using a strut" is disclosed.

However, this conventional mudguard method has a problem in the following points.

First, in the case of performing a high-depth trenching construction, the H-beam alone cannot resist the earth pressure of the rear soil, so a large number of support materials (Strut, Earth Anchor, Raker, etc.) must be used to reinforce it. Not only is it not economical,

It is difficult to secure a working space and is structurally inefficient, so there is a risk of subsidence.

Second, the conventional structure of the earth retaining structure is a rigid body, which can serve as a earth wall, but the displacement of the upper head occurs relatively large, so that the relaxation of the back ground is large.

The present invention has been made to solve the problems as described above,

By introducing a self-supporting retaining structure in which thumb piles and horizontal and inclined bracing are mutually coupled, the member force and displacement are significantly reduced compared to the existing method, thereby ensuring the stability of the member itself even when the same ground conditions and loads are applied.

In addition, sufficient work space can be secured by not using the supporting materials (strut, earth anchor, raker, etc.) used in the existing construction method.

In addition, it is possible to shorten the overall air by reducing the working time for the installation of it without the use of supporting materials.

Furthermore, it is an object of the present invention to provide a self-supporting self-supporting retaining method using bracing, which can promote economic efficiency because there is no need to introduce additional members for reinforcing the stability of the retaining structure.

And by arranging the inclined bracing according to the present invention in a truss structure, the thumb pile receives the reaction force of the force in the vertical and horizontal directions and simultaneously generates the reaction force in the diagonal direction, thereby dispersing and supporting the force to each member in the vicinity.

Therefore, it is another feature to provide a self-supporting earth retaining method using bracing that can further reinforce the supporting force because the reaction force applied to the thumb pile is applied by tension and compression.

In addition, by constructing the mudguard structure according to the present invention and filling the inclined surface of the open cut so as to be level with the ground, using a bracing that secures accessibility of excavation equipment or workers when excavating the excavation area to ensure work convenience and stability Another object is to provide a self-supporting retaining method.

The self-supporting earthenware construction method using bracing according to the present invention

(a) excavating the circumference of the excavation area to form an open cut;

(B) step of rooting a plurality of thumb piles along both sides of the ground formed by the open cut;

(c) forming a mudguard structure by connecting the thumb pile with horizontal or inclined bracing, or both of them; And

(d) excavating the excavation area to form a foundation.

And the inclined bracing according to the present invention is characterized in that the truss (truss) structure arranged in a staggered mutually.

In addition, in the step (c) according to the present invention, the step (c′) of repairing the inclined surface by filling the soil on the inclined surface formed on the outside of the mudguard structure when excavating the open cut or covering the upper part of the inclined surface with a perforated plate It is characterized by being included.

Furthermore, the step (c) according to the present invention is characterized in that it further comprises a step (c″) of mounting the earth plate between adjacent thumb piles.

In the self-supporting earthing method using bracing according to the present invention, when the same ground condition and load are applied by significantly lowering the member force and displacement compared to the existing method by introducing a self-supporting earthing structure in which horizontal and inclined bracing are mutually coupled. Edo can secure the stability of the absent itself,

In addition, sufficient work space can be secured by not using the supporting materials (strut, earth anchor, raker, etc.) used in the existing construction method.

In addition, it is possible to shorten the overall air by reducing the working time for the installation of it without the use of supporting materials.

Furthermore, there is no need to introduce an additional member for reinforcing the stability of the retaining structure, and thus economic efficiency can be achieved.

And by arranging the inclined bracing according to the present invention in a truss structure, the thumb pile receives the reaction force of the force in the vertical and horizontal directions and simultaneously generates the reaction force in the diagonal direction, thereby dispersing and supporting the force to each member in the vicinity.

Therefore, the reaction force applied to the thumb pile is applied by tension and compression, so that the supporting force can be further reinforced.

In addition, by constructing the mudguard structure according to the present invention and filling the inclined surface of the open cut so as to be level with the ground, it is possible to secure workability and stability by securing accessibility of excavation equipment or workers when excavating the excavation area.

1 is a flow chart showing a self-supporting method of mudguard using bracing according to the present invention,
Figures 2a to 2f is a process diagram showing the working process of the self-supporting earthing method using the bracing according to the present invention,
3 is a plan view and a front view showing a self-supporting retaining structure using bracing according to the present invention;
Figure 4 is a perspective view showing a variety of arrangement of the inclined bracing of the self-supporting soil retaining method using the bracing according to the present invention.

A self-supporting earthenware construction method using bracing according to the present invention will be described in detail with reference to the accompanying drawings.

First of all, if the name of a similar meaning used in this specification is defined for convenience,

First,'ground surface (G1)' means the ground surface before excavation,

Next,'ground (G2)' refers to the ground surface that is the basis or foundation of structures such as buildings and temporary objects by excavating the ground.

As shown in Figures 1 to 2f, a self-supporting soiling method using bracing according to the present invention

(a) excavating the circumference of the excavation area to form an open cut 10 (S100);

(b) step of advancing a plurality of thumb piles (20) along both sides of the ground (G2) formed by the open cut (S200);

(c) forming a mudguard structure by connecting the thumb pile 20 and a horizontal or inclined bracing 30, 40, or both of them to each other (S300); And

(d) excavating the excavation area EA to form a base portion BA (S400).

As shown in Figures 1 to 2f, in the self-supporting earthing method using the bracing according to the present invention, the step (a) (S100) is

This is a step for excavating the circumference of the excavation area EA to form the open cut 10.

That is, in step (a) (S100) according to the present invention, before forming the base portion BA, the inclined surface 11 formed by excavating the ground G1 along the periphery of the excavation area EA and the inclined surface 11 And an open cut 10 is formed on the excavation surface constituting the flat ground G2.

This is because by forming the inclined surface 11 having a certain angle when excavating the ground G1, it is possible to prevent settlement or collapse of the ground G1 or soil during excavation without using a separate earthing method.

At this time, the inclined surface 11 of the open cut 10 is formed on both sides of the ground (G2),

Or one side of the ground (G2), more specifically, it is possible to form in a position surrounding the excavation area (EA) from the outside,

In the latter case, it is considered that the inner inclined surface 11 adjacent to the excavation area EA is excavated together when excavating the excavation area EA to form the base portion BA.

And it is preferable that the depth and width of the ground G2 excluding the inclined surface 11 by the open cut 10 are the same as the installation height and installation width of the horizontal and inclined bracing 30, 40.

Therefore, the height from the ground (G2) to the ground (G1) is the same as the height to the horizontal bracing (30) located at the bottom and the horizontal bracing (30) located at the top,

In addition, the width of the ground (G2) is formed to be the same as the length of each horizontal bracing (30).

As shown in Figures 1 and 2f, in the self-supporting earthing method using the bracing according to the present invention, the step (b) (S200) is

This is a step for rooting a plurality of thumb piles 20 along both sides of the ground G2 formed by the open cut 10.

That is, in step (b) (S200) according to the present invention, in the open cut 10, a plurality of thumb piles 20 are struck along the inner ground G2 adjacent to the excavation area EA, and then rooted. ,

In addition, by driving a plurality of thumb piles 20 along the outer ground G2 surrounding the excavation area EA from the outside,

Each of the thumb piles 20 is arranged in two rows along the ground G2 to surround the excavation area EA.

At this time, the root depth of each of the thumb piles 20 is determined through a review of the stability of the excavation bottom, such as balance of force, support force, heaving, piping, and expansion, and the minimum root depth is about 1.5 m.

The length at which each of the thumb piles 20 is exposed from the ground G2 is a height that can be leveled from the ground G2 to the ground G1, that is, level with the ground G1,

Also, each of the thumb piles 20 uses an H-file or an I-file.

As shown in Figures 1 to 2c, in the self-supporting earthing method using the bracing according to the present invention, the step (c) (S300) is

It is a step for forming a self-supporting mudguard structure PW by interconnecting the thumb pile 20 and the horizontal or inclined bracing 30, 40, or both.

That is, in step (c) (S300) according to the present invention, first, horizontal bracing 30 is connected to upper and lower ends of the thumb piles 20 arranged at mutually facing positions (see FIGS. 2C and 3),

Next, the inclined bracing 40 is connected to the thumb pile 20 or the horizontal bracing 30 arranged at mutually facing positions, or both.

In addition, the thumb pile 20, the horizontal bracing 30, and the inclined bracing 40 are connected by a bolting method by welding or a high-strength bolt so as to maintain the unified behavior of each other, so as to ensure support force. It is preferred.

Further, the inclined bracing 40 is connected to each other by a staggered truss structure.

This is to support the structural characteristics of the truss, that is, the thumb pile 20 receives the reaction force of the force in the vertical and horizontal directions and simultaneously generates the reaction force in the diagonal direction.

In addition, when the inclined bracing 40 is made of a truss structure, it acts to be tensioned and compressed so as to share the reaction force applied to the thumb pile 20, so that an effect of increasing the support force can be obtained.

In addition, the attached Figure 4 is a modified example showing another arrangement structure of the inclined bracing 40 according to the present invention

First, in Fig. 4 (a), the inclined bracing 40 is connected to be staggered and arranged horizontally at the upper end of the thumb pile 20 at four adjacent points,

Next, in Figure 4 (b), the inclined bracing 40 is connected to be arranged to be staggered in a mutually inclined shape to the thumb pile 20 positioned in the diagonal direction.

It is also desirable that the thumb piles 20 arranged side by side prevent distortion in the left and right directions to ensure structural stability.

Therefore, by reducing the effective buckling length of the thumb pile 20 by connecting the horizontal bracing 30 and the inclined bracing 40, and furthermore, the inclined bracing 40 in a truss structure, the displacement of the upper end of the thumb pile 20 is significantly increased. Reduce,

In addition, under the same ground (G2) and load conditions, the member force, that is, the bending moment and the shear force, can be reduced to ensure economical stability, thereby increasing the safety factor.

When excavating the excavation area EA, it is possible to excavate to a deeper depth.

In particular, the height to the upper end of the mudguard structure according to the present invention is the same as the height of the ground, so that the mudguard structure (PW) is located at the bottom of the ground (G1)

At the same time as reducing the effective buckling length, it is possible to deepen the depth of excavation and maintain the depth of excavation.

Next, as shown in Figure 2d, after installing the bracing (30) (40) through the step (c) in the earthing method according to the present invention,

(C') step (S310) of mounting the earth plate 23 between the mutually adjacent thumb pile 20 is further made.

That is, in the step (c′) (S310), the earth plate 23 is arranged along the excavation surface on which the open cut is formed, and is inserted between the flanges 21 of each thumb pile 20 adjacent to each other to each thumb pile. (20) to prevent the soil from entering the soil (G2) formed between the collapse,

In addition, the earth plate 23 may use a variety of materials, such as wood, steel sheet, or deck plate,

This can be selected in consideration of various factors such as the properties of the topsoil where the excavation work is performed or the soil pressure.

Furthermore, as illustrated in FIGS. 3 and 4, horizontal shorings 25 are formed at upper and lower portions of the thumb pile 20 in a form orthogonal to each thumb pile 20 arranged along the excavation surface of the open cut. It is arranged side by side to support the thumb pile 20 in the left and right, that is, in the horizontal direction.

Meanwhile, as shown in FIG. 2E, after each bracing 30 and 40 are installed in step (c) (S300), and after installing the earth plate 23 in step (c′) (S310),

A step (c″) (S320) for restoring the inclined surface 11 formed during excavation of the open cut 10, that is, the inclined surface 11 surrounding the excavation area EA from the outside, is further provided.

In the (c″) step (S320) to recover the slope

First, as shown in (a) of Figure 2e and the method of filling the soil on the slope

Second, as shown in FIG. 2E (b), there is a method of restoring the inclined surface by covering the upper portion of the inclined surface with the perforated plate 13.

First, the method of restoring the inclined surface through the filling of the soil is between the outer inclined surface 11 of the open cut 10 and the outer wall surface of the mudguard structure PW, that is, the wall surface on which the earth plate 23 is mounted on each of the thumb piles 20. After filling the earth and sand,

The filled earth is compacted at a constant pressure to form a recovery area R so as to be level with the top of the ground G1 and the retaining structure PW.

Next, the method of restoring the inclined surface by the perforated plate is to install the perforated plate 13 in the upper portion where the upper surface of the thumb pile 20 and the inclined surface 11 are started.

In this case, the perforated plate 13 should be installed horizontally with the ground (G1),

This is to remove the elements that interfere with the work by preventing the jaws formed by the perforated plate 13 when the equipment for excavation work in close proximity.

In addition, when excavating the excavation area EA inside the retaining structure PW, if the inclined surface 11 of the open cut 10 is not restored, the inclined surface 11 around the retaining structure PW is used for excavation work. It can be an obstacle that makes it difficult to work close to equipment or workers.

This may cause a problem that the excavation work cannot be smoothly performed.

Therefore, in the step (c) (S300) to construct the earth retaining structure (PW), the (c″) step (S310) to install the earth plate 23, and then

In step (c″), filling the inclined surface 11, forming a recovery area (R) parallel to the ground (G1) to ensure accessibility of equipment or workers for excavation work to ensure work convenience and stability It is desirable to be able to.

And in the (c″) step (S320), the recovery method of the inclined surface is placed on the upper portion of the inclined surface 11, that is, the perforated plate 13 is placed on the top of the thumb pile 20 and the inclined surface 11, ,

In this case, the perforated plate 13 is installed horizontally with the ground G1 to ensure accessibility and work convenience of equipment or workers for excavation work.

In addition, when the inclined surface 11 is restored by the perforated plate 13, the horizontal bracing 30 located at the upper portion is not installed, and the perforated plate 13 replaces the role of the horizontal bracing 30,

Alternatively, although not shown in the accompanying drawings, it is possible to install the perforated plate only on the thumb pile adjacent to the inclined surface to be restored in a state where the horizontal bracing located at the top is installed.

As shown in Figures 1 to 2f, in the self-supporting earthing method using the bracing according to the present invention, the step (d) (S400) is

After the steps (a) to (c) (S300), after the self-supporting earth retaining structure (PW) is built, the excavation area (EA) located inside the earth retaining structure (PW) is excavated to form the base (BA). It is a step to do.

In step (d) (S400) according to the present invention, the member force and displacement are significantly compared to the conventional method by the retaining structure (PW) formed by the thumb pile (20), horizontal bracing (30) and inclined bracing (40). By lowering it, it is possible to secure the safety and economy of the member itself even when applying the same ground conditions and loads,

In addition, even when the foundation portion BA is formed by excavation of the excavation region EA, it is possible to further deepen the depth of the foundation portion BA.

In the above, specific shapes and directions have been mainly described in the description of the self-supporting retaining method using the inventor's bracing with reference to the accompanying drawings, but the present invention can be modified and changed in various ways by those skilled in the art. It should be interpreted as being included in the scope of the invention.

10: open cut 11: slope
13: double-edged board
20: thumb pile 21: flange
23: earth plate 25: horizontal support
30: horizontal bracing
40: inclined bracing
EA: Excavation area BA: Foundation
PW: Earthing structure G1: Ground
G2: Ground R: Recovery area
S100: (a) step S200: (b) step
S300: (c) step S310: (c′) step
S320: (c″) step S400: (d) step

Claims (4)

(a) excavating the circumference of the excavation area to form an open cut having an inclined surface;
(B) step of rooting a plurality of thumb piles along both sides of the ground formed by the open cut;
(c) connecting the thumb pile with horizontal or inclined bracing, or both of them; And
(d) excavating the excavation area to form a foundation;

The step (c) further includes the step (c′) of mounting the earth plate between the thumb piles adjacent to each other along the excavation surface which is the open cut,

In the step (c), when the open cut is excavated, the step (c″) of further filling the soil on an inclined surface formed on the outside of the mudguard structure or covering the upper portion of the inclined surface with a perforated plate to restore the inclined surface is further included. A self-supporting earth retaining method using bracing. According to claim 1,
The inclined bracing is a self-supporting earth retaining method using bracing, characterized in that the truss (truss) arranged in a mutually staggered. According to claim 1,
A self-supporting earthing method using bracing, characterized in that a horizontal support is connected to each thumb pile arranged along the excavation surface of the open cut orthogonally. delete

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