KR20230144862A - Pile wall for both retaining and permanent walls And Construction method - Google Patents

Abstract

The present invention relates to a pile wall for both a temporary earth retaining wall and a permanent wall and its construction method. More specifically, the present invention relates to a pile wall used as an earth retaining temporary wall and a permanent wall, and more specifically, to a pile wall using a CFT (Concrete Filled Tube) pile formed by filling the inside of a steel pipe with concrete and a steel plate pile connecting it. A pile wall that is used as a temporary earth retaining wall and a permanent wall using CFT piles and steel sheet piles that can be used as a temporary earth retaining wall and a permanent wall at the same time, allowing not only the exterior basement wall of the building to be removed but also reducing the number of ground anchors installed. This is about its construction method.
A preferred embodiment of the pile wall used as an earth retaining temporary wall and a permanent wall of the present invention is composed of a steel pipe of circular cross-section formed by joining support members on both sides, and concrete filled inside the steel pipe at regular intervals in the lateral direction. CFT files to be placed; It includes a steel sheet pile installed between the CFT pile and adjacent steel pipes so that both ends are supported by support members of the adjacent CFT pile.

Description

Pile wall for both retaining and permanent walls using CFT piles and steel plate piles and its construction method {Pile wall for both retaining and permanent walls And Construction method}

The present invention relates to a pile wall for both a temporary earth retaining wall and a permanent wall and its construction method. More specifically, the present invention relates to a pile wall used as an earth retaining temporary wall and a permanent wall, and more specifically, to a pile wall using a CFT (Concrete Filled Tube) pile formed by filling the inside of a steel pipe with concrete and a steel plate pile connecting it. A pile wall that is used as a temporary earth retaining wall and a permanent wall using CFT piles and steel sheet piles that can be used as a temporary earth retaining wall and a permanent wall at the same time, allowing not only the exterior basement wall of the building to be removed but also reducing the number of ground anchors installed. This is about its construction method.

In general, when filling, cutting, or excavating, a slope is usually used to maintain the stability of the ground, but when excavating to secure more effective use of the land or to construct the foundation of a structure or underground space for a building in the city, Vertical excavation is usually performed without a slope, and during such vertical excavation, a temporary earth retaining structure is installed at the vertical surface to prevent collapse of the ground.

However, as shown in FIGS. 6b and 7b, in the related art, the underground outer wall 12 was constructed again on the front of the earth retaining wall 11 constructed by the CIP method, and a separation space for drainage facilities was again built on the front of the underground outer wall 120. Because the stucco wall 13 had to be constructed, the total wall thickness from the site boundary line to the stucco wall became thick, which resulted in a problem of poor site usability.

The technology behind the present invention includes Patent Registration No. 0960603, “Construction method of underground composite wall using earth retaining wall composed of PHC pile” (Patent Document 1). In the above background technology, "(a) forming an earth retaining wall composed of PHC piles in the ground by repeating the steps of drilling the ground along the property boundary line, inserting PHC piles, and finally pounding; (b) supporting the brace at the same time Step of constructing the internal pillar, which becomes the pillar of this structure, according to the plan plan; (c) arranging the head of each PHC pile, inserting the connecting bar so that it is exposed in the hollow of the PHC pile, and then joining the connecting bar fixing means to the connecting bar. Step of fixing the installation position of the connecting bar; (d) excavating to a certain depth, then connecting the heads of each PHC pile, arranging rebar and installing formwork to form a cap beam that becomes the foundation for the pillar or wall on the ground floor. Then, simultaneously pouring the cap beam concrete and the concrete filling the cavity of each PHC pile; (e) excavating to a predetermined planned depth, then placing a wale and installing a brace connecting the wale and the internal column to support the retaining wall. Repeating the process of excavating until the planned excavation height is reached; (f) installing a number of shear connectors on the outer surface of the PHC pile corresponding to the lowest floor, fixing the metal lath, pouring the foundation floor concrete, and pouring the outer wall concrete of the lowest floor Step of constructing the lowest floor composite wall by pouring; (g) After removing the wales and braces of the floor corresponding to the lowest floor + 1st floor, install a number of shear connectors on the outer surface of the PHC pile, fix the metal lath, and then place the floor concrete of the floor of the floor. Repeating the process of pouring and pouring the outer wall concrete of the corresponding floor to construct the composite wall of the corresponding floor from the ground floor to the first floor; and (h) pouring the ground floor floor concrete; In step (f), the foundation floor is included. An earth retaining wall composed of PHC piles is formed on the bottom of the foundation floor in the area where the composite wall and the composite wall are in contact, so that the load transmitted through the composite wall is evenly transmitted to the ground. “Using underground composite wall construction method.” is proposed.

However, the above background technology had a problem in that separate shear connectors had to be installed one by one to construct a composite wall, and this also increased the total thickness of the wall, resulting in reduced land usability.

Patent Registration No. 0960603 “Construction method of underground composite wall using earth retaining wall composed of PHC pile”

The present invention is intended to solve the problems described above. The outer wall of the basement floor can be constructed as close to the property line as possible, which increases the usability of the land and reduces the thickness of the wall, making it economical and easy to construct. The purpose is to provide walls and their construction methods.

The present invention includes a steel pipe of circular cross-section formed by joining support members on both sides, CFT piles made of concrete filled inside the steel pipe and disposed at regular intervals in the lateral direction; The purpose is to provide a pile wall that is used as an earth retaining temporary wall and a permanent wall using CFT piles and steel plate piles, characterized in that it consists of a CFT pile and a steel plate pile installed between adjacent steel pipes so that both ends are supported by the support members of the adjacent CFT pile. .

In addition, the purpose of the present invention is to provide a pile wall that is used as a temporary retaining wall and a permanent wall using CFT piles and steel plate piles, which are made of steel plates with an arch-shaped cross-section and are installed with the convex portion facing the back of the CFT pile.

In addition, the steel plate pile is intended to provide a pile wall that is used as a temporary earth retaining wall and a permanent wall using CFT piles and steel plate piles, which are characterized as sheet piles.

In addition, we intend to provide a pile wall that is used as both a temporary earth retaining wall and a permanent wall using CFT piles and steel plate piles, which are characterized in that the inner surface of the steel pipe is roughened.

In addition, we intend to provide a pile wall that is used as both a temporary earth retaining wall and a permanent wall using CFT piles and steel sheet piles, which are characterized in that the steel pipe protrudes at the front to form studs.

In addition, the front of the steel pipe is composed of a connecting root consisting of a shear connection embedded inside the steel pipe and a joint that protrudes outward and bends upward. Pile for temporary earth retaining walls and permanent walls using CFT piles and steel plate piles. We would like to provide the month.

In addition, (a) joining support members to both sides of the outer surface of the steel pipe; (b) drilling the ground at regular intervals along the property boundary line and installing the casing; (c) inserting a steel pipe into the casing so that the support members are positioned laterally; (d) forming a CFT pile by drawing and removing the casing and pouring concrete inside the steel pipe; (e) perforating between CFT files; (f) installing steel sheet piles between adjacent CFT piles so that both ends are supported by the support members of adjacent CFT piles to form a pile wall that serves as both an earth retaining temporary wall and a permanent wall; a CFT pile comprising a. The purpose of this study is to provide a pile wall construction method for both temporary and permanent earth retaining walls using steel plate piles.

The pile wall and its construction method for use as a temporary earth retaining wall and a permanent wall of the present invention are used as a temporary earth retaining wall and a permanent wall at the same time by using a plurality of CFT piles and steel sheet piles connecting them, so that the exterior basement wall of the building can be deleted. In addition, it can reduce the number of ground anchors installed, and has the very useful effect of allowing the exterior walls of the basement and the pillars or walls of the ground floor to be constructed as close to the property line as possible.

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention along with the detailed description of the invention. Therefore, the present invention is limited to the matters described in the attached drawings. It should not be interpreted as limited.
Figure 1 is a cross-sectional view of a pile wall used as a temporary earth retaining wall and a permanent wall using CFT piles and steel plate piles of the present invention.
Figure 2 is a cross-sectional view of the CFT file of the present invention.
Figure 3 is a perspective view showing various embodiments of the steel sheet pile of the present invention.
Figures 4a and 4b are side views of an embodiment in which an anchor is configured outside the steel pipe of the present invention.
Figure 5 is a side view of an embodiment in which a connecting root is configured on the outside of the steel pipe of the present invention.
Figure 6a is a side view showing a pile wall used as a temporary earth retaining wall and a permanent wall using CFT piles and steel plate piles of the present invention.
Figure 6b is a side view showing a conventional earth retaining wall constructed using the CIP method and the basement exterior wall constructed.
Figure 7a is a structural drawing of a structure constructed as a temporary earth retaining wall and a permanent wall pile wall using CFT piles and steel plate piles of the present invention.
Figure 7b is a structural drawing of a structure constructed using a conventional retaining wall using the CIP method.
Figures 9 to 12 sequentially show the construction method of a pile wall used as a temporary earth retaining wall and a permanent wall using CFT piles and steel plate piles of the present invention.

Below, the present invention will be described in detail with reference to embodiments shown in the attached drawings, but the presented embodiments are illustrative for a clear understanding of the present invention, and the present invention is not limited thereto.

Hereinafter, the technical configuration of the present invention will be described in detail according to preferred embodiments.

Figure 1 is a cross-sectional view of a pile wall for both temporary and permanent earth retaining walls using CFT piles and steel plate piles of the present invention, and Figure 2 is a cross-sectional view of the CFT pile of the present invention.

As shown in FIG. 1, the pile wall (10) used as an earth retaining temporary wall and a permanent wall using CFT piles and steel plate piles of the present invention is a CFT filled with concrete (113) inside a circular steel pipe (111a) and placed at regular intervals. It consists of a pile 110 and a steel sheet pile 120 installed between the CFT pile 110 and the adjacent CFT pile 110.

The CFT pile 110 is formed by filling the inside of a steel pipe 111a with a circular cross-section with concrete 113, and support members 112 are joined to both sides of the steel pipe 111a.

The support member 112 is designed to support the steel sheet pile 120 and can be made of various shapes. As shown in FIG. 2A, steel sheet plates are joined by a method such as welding, or as shown in FIG. 2B, it has a B or V cross section. An angle having can be joined to each of the corresponding two sides of the steel pipe 10.

At this time, the inner surface of the steel pipe 111a is roughened so that it can be used as a substitute for a stud.

The pile wall (10) for use as an earth retaining temporary wall and a permanent wall using CFT piles and steel plate piles of the present invention allows the CFT pile (110) and the steel plate pile (120) to support the earth pressure on the back side, and at this time, the support member (112) is a steel plate. Both ends of the pile 120 are supported respectively, and as shown, they are formed to be inclined from the side of the steel pipe 111a toward the rear, so that the ends of the steel sheet pile 120 are supported by the back earth pressure when mounted on the support member 112. This can prevent the support member 112 from being separated.

Figure 3 is a perspective view showing various embodiments of the steel sheet pile of the present invention.

As shown in FIGS. 3 and 12a, the steel sheet pile 120 is made of a steel sheet with an arch-shaped cross-section and is installed so that the convex part faces the outside of the pile wall 10, so that the arching action of the arch-shaped steel sheet pile 120 causes the rear surface to be formed. It can be used to distribute and transmit earth pressure.

At this time, as shown in FIG. 3A, the steel plate pile 120 can be configured to connect the inner surfaces of both sides of the steel plate pile 120 with a vertical reinforcement plate 126 in the shape of a vertical plate, so as to provide reinforcement against the back earth pressure. , At this time, one or more vertical reinforcement plates 126 may be configured at equal or unequal intervals in the height direction of the steel sheet pile 120.

In addition, a horizontal reinforcing plate 127 in the shape of a horizontal plate can be configured on the inner surface of the steel sheet pile 120. In this case, as shown in Figure 3b, the horizontal reinforcing plate 127 is formed only at both ends of the steel sheet pile 120. It may be joined to the inner surface by a method such as welding, or, as shown in FIG. 3C, may be formed to have the same cross section as the steel sheet pile 120 and be joined to the entire inner surface of the steel sheet pile 120.

In addition to the arcuate cross-section described above, the steel sheet pile 120 may also be made of a sheet pile, as shown in FIG. 12B. Sheet piles can have various cross-sectional shapes, and both ends can be hole-shaped or concave-convex so that they can fit together.

Such sheet piles can be configured in various ways in response to the spacing between the CFT piles 10, are quick and simple to construct, and have the advantage of low construction costs.

In this way, in the present invention, compared to an earth retaining wall using a general CIP method, the CFT pile 110 filled with concrete inside the steel pipe 111a is used as a permanent building exterior wall to increase rigidity to support gravity loads and underground. It is possible to secure in-plane rigidity for earthquake-resistant design, and it is easy to form work during construction, while having an excellent effect on constructability and reducing construction costs.

Figures 4a and 4b are side views of an embodiment in which an anchor is configured on the outside of the steel pipe of the present invention, and Figure 5 is a side view of an embodiment in which a connecting bar is configured on the outside of the steel pipe of the present invention.

. As shown in Figure 4a, the steel pipe 111a protrudes from the front to form a stud 160, so that the main bars 161 of the slab, etc. can be connected using the coupler 163 or welded to the stud 160. It may be possible.

In addition, as shown in Figure 4b, the steel pipe 111a protrudes on the front side to form a stud 160, and a U-shaped wale 166 is installed by fixing it to the stud 160 and a slab is attached to the wale 166. The main roots 161 of can be combined.

At this time, the stud 160 can use various studs such as stud anchors and plate studs.

In particular, as shown in Figure 5, for connection to the main bar of the slab, the front of the steel pipe 111a is provided with a shear connection portion 171 embedded in the inside of the steel pipe 111a and a coupling portion 172 that protrudes outward and is bent upward. ) can be configured at equal or unequal intervals in the height direction, and such connectors 170 are connected to the outer surface of the steel pipe 111a by bending the coupling portion 172 upward. Since it is configured in close contact, it is possible to prevent interference when inserting the steel pipe 111a and to use the coupling portion 172 of the connecting muscle 170 horizontally only in necessary areas.

In the case of the connecting bar 170, it can be welded to the outer surface of the steel pipe 111a, but it is poured into the inside of the steel pipe 111a by penetrating into the inside of the steel pipe 10 to form a shear connection 171. It acts as a shear connector for synthesis with concrete and has the effect of allowing the connector 170 to be anchored inside.

Figure 6a is a side view showing a pile wall used as a temporary earth retaining wall and a permanent wall using CFT piles and steel plate piles of the present invention, and Figure 6b is a side view showing a conventional earth retaining wall built using the CIP method and the basement outer wall constructed. 7A is a structural drawing of a structure constructed as a temporary earth retaining wall and a pile wall used as a permanent wall using CFT piles and steel plate piles of the present invention, and Figure 7b is a structural drawing of a structure constructed with a conventional earth retaining wall using the CIP method. .

As shown in Figure 6b, conventionally, the basement exterior wall (12) was constructed again on the front of the earth retaining wall (11) constructed by the CIP method, and a separation space for drainage facilities was again placed on the front of the basement exterior wall (12). (13) had to be constructed, but in the present invention, as shown in Figure 6a, the decorative wall (13) is constructed directly with a separation space on the front of the pile wall (10) without constructing an underground exterior wall, or sometimes even the construction of the decorative wall is omitted. In order to be able to do so, the total thickness (d), which is the sum of the thickness of the pile wall (t1), the separation space (t2), and the thickness of the stucco wall (t3) in the present invention, is the thickness of the retaining wall (T1) in the conventional wall, the basement. It has the effect of being significantly reduced compared to the total thickness (D), which is the sum of the exterior wall thickness (T2), separation space (T3), and decoration wall thickness (T4).

In particular, in the present invention, the pile wall (10) is formed as both a temporary earth retaining wall and a permanent wall, and since the inside and outside of the basement are tightly separated by the steel plate pile (120), the installation of a separate drainage facility may not be necessary. The thickness can be further reduced.

In particular, compared to the case of the conventional earth retaining permanent wall of FIG. 7b, the pile wall of the present invention can reduce the number of anchors within the load capacity during construction, as shown in FIG. 7a, so that the number of ground anchors 19 can be reduced while still providing sufficient Wall rigidity can be secured.

Figures 9 to 12 sequentially show the construction method of a pile wall used as a temporary earth retaining wall and a permanent wall using CFT piles and steel plate piles of the present invention.

In the construction method of the pile wall 10 of the present invention, first, as shown in FIG. 2, support members 112 are joined to both sides of the outer surface of the steel pipe 111a (a).

The support member 112 supports the steel plate pile 120 and can have various shapes, and is joined to the corresponding two sides of the steel pipe 10, respectively.

Afterwards, as shown in FIG. 8, the ground is drilled at regular intervals along the property boundary line and the casing 20 is installed (b).

The casing 20 allows the steel pipe 111a of the present invention to be inserted and installed, and the casing is perforated only at the location where the steel pipe 111a is installed.

Thereafter, as shown in FIG. 9, the steel pipe 111a is inserted into the casing 20 so that the support members 112 are positioned on the sides (c).

Since the support member 112 in the present invention is developed in a shape where the steel sheet pile 120 connects the side of the adjacent steel pipe 111a, the support member 110 at which the end of the steel sheet pile 120 is supported is the steel pipe 111a. ) and insert it into the inside of the casing (20) by adjusting the position so that it is located on both sides of the casing (20).

Thereafter, as shown in FIG. 10, the casing 20 is pulled out and removed, and concrete 113 is poured inside the steel pipe 111a to form a CFT pile 110 (d), and then, as shown in FIG. 11, After drilling a space between the CFT piles 110 (e), the steel sheet piles 120 are installed (f), as shown in FIG. 12 .

Drilling between the CFT pile 110 and the CFT pile 110 can be performed by various known methods. As shown in FIG. 11, the steel sheet pile 120 is formed by overlapping the perforation holes h with a guide casing. Create a space for installation.

The steel sheet pile 120 is installed between adjacent CFT piles 110 so that both ends are supported by the support members 112 of the adjacent steel pipes 111a, so that the CFT pile 110 and the steel sheet pile 120 are connected to the pile wall (10). ) to form.

At this time, the steel sheet pile 120 is made of a steel sheet with an arch-shaped cross-section, as shown in Figure 12a, and is installed so that the convex part faces the outside of the pile wall 10, so that the arching action of the arch-shaped steel sheet pile 120 causes the rear surface to be raised. It functions to distribute and transmit earth pressure.

Additionally, the steel sheet pile 120 may be made of a sheet file, as shown in FIG. 12B.

The pile wall for use as a temporary earth retaining wall and a permanent wall of the present invention as described above and its construction method are used as a temporary earth retaining wall and at the same time as a permanent wall by using a plurality of CFT piles and steel sheet piles connecting them, so that they can be used as a temporary earth retaining wall and a permanent wall at the same time. Not only can it be deleted, but it can also reduce the number of ground anchors installed, and has the very useful effect of allowing the exterior walls of the basement and the pillars or walls of the ground floor to be constructed as close to the property line as possible.

So far, the present invention has been described in detail with reference to the presented embodiments, but those skilled in the art can make various variations and modifications without departing from the technical spirit of the present invention with reference to the presented embodiments. will be. The present invention is not limited by such variations and modifications, but is limited by the claims appended below.

10: File Month
110: CFT file
110a: steel pipe
111: support member
120: steel sheet pile
160: stud
170: connecting muscle
20: Casing

Claims (9)

CFT piles (110) are composed of a steel pipe (111a) of circular cross-section, which is formed by joining support members (112) on both sides, and concrete (113) filled inside the steel pipe (111a), and are arranged at regular intervals in the lateral direction. )class;
A CFT pile and a steel plate pile, characterized in that consisting of a CFT pile 110 and a steel plate pile 120 installed between the adjacent steel pipe 111a so that both ends are supported by the support members 112 of the adjacent CFT pile 110. Pile wall for both temporary and permanent earth retaining walls using . In claim 1,
The steel plate pile 120 is made of a steel plate with an arch-shaped cross-section and is installed with the convex portion facing the back of the CFT pile 110. A pile wall that is used as a temporary earth retaining wall and a permanent wall using CFT piles and steel plate piles. In claim 2,
A pile wall used as an earth retaining temporary wall and a permanent wall using CFT piles and steel plate piles, characterized in that one or more vertical reinforcing plates 126 in the shape of a vertical plate are configured to connect the inner surfaces of both sides of the steel plate pile 120. In claim 2,
A pile wall that is used as an earth retaining temporary wall and a permanent wall using CFT piles and steel plate piles, characterized in that one or more horizontal reinforcing plates (127) in the shape of a horizontal plate are formed on the inner surface of the steel plate pile (120). In claim 1,
The steel plate pile 120 is a pile wall used as an earth retaining temporary wall and a permanent wall using CFT piles and steel plate piles, which are characterized as sheet piles. In claim 1,
A pile wall used as a temporary earth retaining wall and a permanent wall using CFT piles and steel plate piles, wherein the inner surface of the steel pipe (111a) is roughened. In claim 1,
The steel pipe (111a) is a pile wall that is used as a temporary earth retaining wall and a permanent wall using CFT piles and steel plate piles, characterized in that the studs 160 are formed by protruding from the front. In claim 1,
CFT, characterized in that the front of the steel pipe (111a) is composed of a connection root (170) consisting of a shear connection portion (171) embedded in the inside of the steel pipe (111a) and a joint portion (172) that protrudes outward and is bent upward. Pile wall for both temporary and permanent earth retaining walls using piles and steel sheet piles. In the pile wall construction method for both a temporary earth retaining wall and a permanent wall according to any one of claims 1 to 8,
(a) joining support members 112 to both sides of the outer surface of the steel pipe 111a;
(b) drilling the ground at regular intervals along the site boundary line and installing the casing (20);
(c) inserting the steel pipe (111a) into the casing (20) so that the support members (112) are positioned on the sides;
(d) forming a CFT pile 110 by drawing and removing the casing 20 and pouring concrete 113 inside the steel pipe 111a;
(e) drilling a space between the CFT files 110 and the CFT files 110;
(f) Steel plate piles 120 are installed between adjacent CFT piles 110 so that both ends are supported by the support members 112 of adjacent CFT piles 110, thereby creating a pile wall (10) for both temporary and permanent earth retaining walls. A pile wall construction method for both a temporary earth retaining wall and a permanent wall using CFT piles and steel plate piles, comprising the step of forming a.

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