KR102195496B1 - Pile for earth self-retaining wall using cast in place concrete pile with double I beam - Google Patents

Abstract

The present invention relates to a self-supporting soil barrier pile using a double eye beam that can be excavated to a deep depth even if the root length is short in a narrow section of the site boundary line in an urban area, and forms resistance by main earth pressure. A horizontal reinforcing member that can be used is combined with a double-eye beam-included in-situ concrete pile, so even if the near-entry length of a double-eye beam-included concrete pile is shortened, the double-eye-beam is included to a deeper depth. Even if a concrete pile is not installed, it is possible to perform deep excavation and improve workability, and respond to the main earth pressure by forming a small sized inclined reinforcing member and vertical resistance reinforcing piles that connect horizontal reinforcing members combined with on-site concrete. The site includes a double-eye beam that can be dug to a deep depth even in the case of a soft ground, as well as sufficient soil barrier construction even if the root length for passive earth pressure formation is formed short. Provides a self-supporting soil barrier pile using poured concrete piles.

Description

Pile for earth self-retaining wall using cast in place concrete pile with double I beam}

The present invention relates to a self-supporting soil barrier pile using a cast-in-place concrete pile including a double eye beam capable of digging to a deep depth even if a near-entry length is short in a narrow section of a site boundary line in an urban area.

The soil barrier construction method is a temporary structure to prevent soil or groundwater from entering the excavation ground when installing direct foundations, pile foundations, and underground structures.

Temporary facilities are used during construction and are demolished after completion of construction, and are temporarily used to construct the main body structure, and have been neglected in the past.However, recently, the construction has become large and complicated, and the cost, amount of construction, and construction time account for the entire construction. It has become very important because it has grown.

The construction method is composed of an earthen wall that supports the surrounding soil and a support material that supports the earthen wall, and can be classified in various ways according to the type of earthen wall and support material.

Representative soil barrier construction methods include H-beam and earth plate construction method, sheet pile construction method, main heat type soil barrier construction method, and slurry wall construction method.

H-beam and earth plate construction method is a method of installing a retaining wall by inserting an H-beam at regular intervals and inserting the earth plate between the H-beams at the same time as excavation.It is relatively simple and economical to install a strut brace or anchor to support the earth retaining wall. Although the air is short, the water resistance is low, so grouting reinforcement is required and countermeasures against the heaving phenomenon are required.

The sheet pile method is a method of forming an earth barrier by connecting steel board piles in a row. It is suitable for soft ground with high water resistance.

The main-row earthing method is a method of forming a main-rowed earthing wall by continuously driving on-site concrete piles.It is a low-noise method that reinforces the earthing wall by inserting reinforcing bars and H beams into the piles.It has excellent water resistance and high rigidity of the wall. Although there is little subsidence, it has the disadvantage that the construction cost is increased and the construction cost is relatively long.

On the other hand, in the main heat-type soil barrier method, the CIP method in which pre-assembled reinforcing bars and coarse aggregates are filled in the excavated ground, and mortar is injected to construct piles at the site, and the soil in the excavation hole is mixed with cement glue, and H beams or reinforcing bars are press-fitted. There is a soil cement method.

The slurry wall construction method is a construction method in which a concrete barrier wall is continuously installed by placing a reinforcing bar net into the ground while preventing the collapse of the ground by using a stabilizer solution during ground excavation. This construction method is suitable for urban construction in consideration of the safety of construction, pollution problems, and influence of adjacent buildings.

On the other hand, the above earth barrier construction method has no choice but to apply a limited construction method due to adjacent structures (roads, buildings, etc.) when excavating in urban areas. As a representative urban excavation method, H-beam is used as a main material to type in a planned location and The excavation method is generally used.

At this time, as a method of forming a wall between H beams, as described above, a wooden board (H-beam and earth plate method) or a cast-in-place pile, that is, a soil cement and a cast-in-place concrete pile method, are used as temporary facility walls as described above.

In the case of using cast-in-place piles, concrete is poured on the top of the piles, and the H-beam and the upper part of the cast-in-place pile are integrated to fix the upper part, which is called a cap beam.

In the conventional case, the cap beam was used only to arrange the horizontal line of the H beam and to suppress the displacement of the top of the cast-in-place concrete pile.

In other words, it could not be used as a strip to support the wall during excavation.

Therefore, for excavation, it is necessary to separately install the first stage strip in close proximity to the lower portion thereof, resulting in a problem of uneconomic construction.

In particular, all of the above-described construction methods have a problem in that they cannot be actually constructed due to earth pressure in a section with a narrow site boundary line in an urban area.

Moreover, in order to cope with the main earth pressure generated from the piles, the roots of the piles have to be penetrated to the ground about 1.5 to 2.5 times more than the exposed piles, but it is difficult to penetrate the piles to a deep depth in the narrow section of the site boundary line. When a situation to be done occurred, it was very difficult to work in a confined space.

In order to solve the above problems, various types of soil barrier construction methods have been conventionally proposed.

As an example, there is a two-row self-supporting soil filming method such as Korean Patent Registration No. 10-1692541 (hereinafter referred to as'Patent Document 1').

In the two-row self-supporting soil-blocking method as in Patent Document 1, the supporting power of the piles can be increased by connecting the piles before and after the piles.

In addition, there is a method of installing a raker in a two-row self-standing pile method, such as Korean Patent No. 10-0964995 (hereinafter referred to as'Patent Document 2').

The same construction method as in Patent Document 2 is configured to increase the supporting force of the retaining wall by arranging the raker in an inclined manner in the excavated space during the construction method of Patent Document 1 described above.

(Patent Literature 1) KR10-1692541 B1 Two-row self-supporting soil barrier construction for heat transfer and post-heat pile connection

(Patent Literature 2) KR10-0964995 Two-row thumb pile soiling method using a B1 raker

However, the two-row self-supporting soil barrier method as in Patent Document 1 can be very useful in a narrow section of the site boundary line by inserting and connecting the heat transfer piles and the post heat piles, but construction efficiency decreases by inserting double piles. There was a problem.

In addition, Patent Document 2 described above was able to increase the supporting power of the retaining wall by additionally installing a raker in the configuration of Patent Document 1, but since the above-described raker must be configured to be of a size sufficient to form a sufficient supporting force, the operator A. During the construction of the building wall or the foundation, the work space was very narrow, resulting in a problem of deteriorating workability.

In order to solve the above problems, the self-supporting soil barrier pile using the cast-in-place concrete pile including the double eye beam according to the present invention has a torsional strength and buckling strength due to a higher section modulus than the existing H-beam even when the ground boundary line is insufficient. In-situ concrete with double-eye beams that can be dug deeper by using a double-eye beam with double eye beams formed inside the concrete, which is excellent and does not cause deformation due to earth pressure. Its purpose is to provide a self-supporting soil barrier file using a pile.

Another object of the present invention is that the horizontal reinforcing member extending in the horizontal direction in which the excavation space is formed is coupled to the double eye beam exposed by the first cut surface of the cast-in-place concrete pile including the double eye beam. Even if the root length of the cast-in-place concrete pile containing the double eye beam, which is a non-exposed section to form the corresponding passive earth pressure, is short, sufficient support to cope with the main earth pressure is formed, and a deep-development can be carried out. When the horizontal reinforcing member is combined with the cast-in-place concrete pile containing the double eye beam in contact with the excavation ground, the support of the cast-in-place concrete pile containing the double-eye beam can be further improved to improve the workability. There is a purpose.

Another object of the present invention is to combine the in-situ concrete pile including the double eye beam and the inclined reinforcing member of a small size that connects the horizontal reinforcing member to the in-situ concrete pile including the double eye beam exposed by the trench. By forming an additional supporting force corresponding to the main earth pressure generated in the exposed section, it is possible to perform sufficient soil barrier construction even if the length of the root length, which is the non-exposed section of the cast-in-place concrete pile including the double eye beam for passive earth pressure formation, is shortened. Of course, the purpose is to prevent structural deformation of the cast-in-place concrete pile including the double eye beam and to secure a sufficient working space.

Another object of the present invention is to form a short root length, which is a non-exposed section of a cast-in-place concrete pile, including a double eye beam for passive earth pressure formation by combining vertical resistance reinforcing piles proximate to the excavation ground to a horizontal reinforcing member. The purpose of this is not only to be able to perform sufficient earth protection, but also to be able to dig deeper in the case of soft ground.

The present invention includes a double eye beam formed inside concrete with a double eye beam that does not cause deformation due to earth pressure due to its superior torsional strength and buckling strength due to a higher section modulus than the existing H beam even when the ground boundary line is insufficient. By using concrete piles, it is possible to dig deeper.

In addition, the horizontal reinforcing member extending in the horizontal direction in which the excavation space is formed is coupled to the double eye beam exposed by the first incision surface of the cast-in-place concrete pile including the double eye beam, so that the passive earth pressure corresponding to the main earth pressure is reduced. Even if the root length of the cast-in-place concrete pile containing the double eye beam, which is a non-exposed section for formation, is short, sufficient support to cope with the main earth pressure is formed, and a deep-depth excavation can be carried out. When the horizontal reinforcing member is combined with the cast-in-place concrete pile containing the double eye beam at the abutting position, the support of the cast-in-place concrete pile containing the double-eye beam can be further improved, thereby improving the workability.

In addition, by combining the in-place concrete pile with double eye beams and the small inclined reinforcing member that connects the horizontal reinforcing member, the main movement that occurs in the exposed section of the in-place concrete pile containing the double eye beam exposed by the trench. By forming an additional supporting force corresponding to the earth pressure, even if the root length, which is the non-exposed section of the cast-in-place concrete pile including the double eye beam for passive earth pressure formation, is shortened, it is possible to perform sufficient earth protection construction as well as the double eye beam. Structural deformation of the included cast-in-place concrete pile can be prevented and a sufficient working space can be secured.

In addition, even if the length of the root length, which is the non-exposed section of the cast-in-place concrete pile including the double eye beam for passive earth pressure formation, is shortened by combining the vertical resistance reinforcing piles proximate to the water digging ground to the horizontal reinforcing member It is not only possible, but the purpose is to enable dug to be carried out at a deep depth even in the case of soft ground.

Figure 1 is a perspective view of a self-supporting soil barrier pile using a concrete pile in place containing a double eye beam according to the present invention.
Figure 2 is a front view of Figure 2;
Figure 3 is a state diagram of an installation of a self-supporting soil barrier pile using a cast-in-place concrete pile containing a double eye beam according to the present invention.

Hereinafter, the configuration of the present invention will be described in more detail with reference to the accompanying drawings.

First, the cast-in-place concrete pile 10 including the double eye beam is a configuration formed by pouring and curing the concrete 12 after inserting the double eye beam 11 in the excavation space excavated at the site.

The first incision in which a part of the concrete 12 of the exposed section A1 exposed to the outside is cut after some digging as shown in Figs. 1 to 2 in the cast-in-place concrete pile 10 including the double eye beam A part of the inner double eye beam 11 is exposed by the surface 13.

Here, the double eye beam 11 has a cross-sectional shape of ㅍ characters by combining the third and fourth plates 11c and 11d between the first and second plates 11a and 11b, and extends in the vertical direction when the soil barrier is constructed. It may be made of a high-strength steel material with a configuration proximate to the ground G1.

Next, the horizontal reinforcing member 20 is exposed by the first cut surface 13 of the cast-in-place concrete pile 10 including a double eye beam that is installed under the ground G1 and receives the main earth pressure when the soil barrier is constructed. It is a configuration for forming a supporting force on the cast-in-place concrete pile 10 including the double eye beam by combining it with the double eye beam 11.

Here, the horizontal reinforcing member 20 extends in the direction in which the excavation space (O) is formed, but the horizontal extension length is the depth of the excavation and the double eye beam protruding under the excavation ground (G2). It depends on the depth of the concrete pile 10.

In particular, the material of the horizontal reinforcing member 20 is preferably made of a steel material.

Meanwhile, in the present invention, the inclined reinforcing member 30 may be further included.

The inclined reinforcing member 30 is formed to be inclined between the cast-in-place concrete pile 10 including the double eye beam extending in the vertical direction and the horizontal reinforcing member 20 extending in the vertical direction to connect them.

More specifically, of the cast-in-place concrete pile 10 including the double eye beam extending in the vertical direction, the exposed section A1 that is exposed without entering the excavation ground G2 and the horizontal reinforcing member extending in the horizontal direction It is a configuration to connect and support (20).

In the present invention, in order to couple the inclined reinforcing member 30 described above to the cast-in-place concrete pile 10 including the double-eye beam, the first cut surface formed on the cast-in-place concrete pile 10 including the double-eye beam A second cut surface 14 identical to the first cut surface 13 is formed on the upper side of (13), and the double eye beam 11 and the horizontal reinforcing member 20 exposed by the second cut surface 14 It is configured to be fixedly coupled to the inclined reinforcing member 30.

Here, the inclination angle of the inclined reinforcing member 30 is the depth of the excavation and the depth of the intrusion of the cast-in-place concrete pile 10 including the double eye beam proximate to the excavation ground G2 (hereinafter referred to as'near entry'. It depends on).

In addition, in the present invention can be configured to further include a vertical resistance reinforcement pile 40.

More specifically, it is a configuration for forming a reaction force on the horizontal reinforcing member 20 by combining the in-situ concrete pile 10 including the double eye beam on the opposite side of the combined position.

The vertical resistance reinforcing pile 40 may be coupled to the lower side of the horizontal reinforcing member 20 as shown in FIG. 2, or may be coupled to the side of the horizontal reinforcing member 20 as in FIG. 3.

Here, the horizontal reinforcing member 20, the inclined reinforcing member 30, and the vertical resistance reinforcing pile 40 are in the form of double eye beams, but are not limited thereto and may have cross-sections of various shapes. The member 20, the inclined reinforcing member 30, and the vertical resistance reinforcing pile 40 may be coupled using welding or fastening means such as bolts/nuts.

A look at the effect of the self-supporting soil barrier pile using the cast-in-place concrete pile including the double eye beam according to the present invention having the above configuration is as follows.

First, the cast-in-place concrete pile 10 including the double-eye beam of the self-supporting soil-breaking pile 100 using the in-situ concrete pile including the double-eye beam according to the present invention is the ground (G1) This is a general configuration formed by pouring and curing the concrete 12 after perforation and insertion of the double eye beam 11, and a detailed description thereof will be omitted.

However, in the self-supporting soil barrier pile 100 using the on-site concrete pile including the double eye beam according to the present invention, the third and fourth plates 11c and 11d are formed between the first and second plates 11a and 11b. It is combined to form a cast-in-place concrete pile 10 including a double eye beam using a double eye beam 11 having a ㅍ shape in cross section.

Accordingly, even when the ground boundary line is insufficient, the double eye beam 11 has a higher cross-sectional modulus than the existing H-beam and has excellent torsional strength and buckling strength, so that it is possible to break through to a deep depth.

On the other hand, as shown in FIG. 4, the cast-in-place concrete pile 10 including the double eye beam has an exposure section A1 exposed to the outside from the ground G1 to the excavation ground G2, and the excavation ground ( In G2), it consists of a non-exposed section (A2), which is the near entry point to the location where the lower end of the cast-in-place concrete pile (10) containing the double eye beam is formed, and in the case of the exposed section (A1), the double eye beam is included. The cast-in-place concrete pile (10) expands due to the change in the volume of the soil in the backfill and generates an acive earth preussure based on the excavation ground (G2), and the non-exposed section (A2) is passive. Earth pressure (passive earth pressure) is generated.

In the present invention, by combining the horizontal reinforcing member 20 to the cast-in-place concrete pile 10 including the double eye beam exposed after construction for the excavation space O, the formation of passive earth pressure corresponding to the main earth pressure as described above is achieved. Even if the length of the non-exposed section (A2) is shortened, the exposed section (A1) of the cast-in-place concrete pile (10) including the double eye beam can form a supporting force capable of sufficiently responding to the main earth pressure while forming a double eye. It is possible to obtain an effect of preventing deformation of the cast-in-place concrete pile 10 including the beam.

That is, when the main earth pressure generated as shown in FIG. 4 is generated, the force is only the passive earth pressure generated in the non-exposed section (A2), which is the near position, and in the normal case, compared to the exposed section (A1), the non-exposed section ( The ratio of A2) should be formed in a length of 1: 1.5 ∼ 2.5. Therefore, if the depth of the excavation is to be formed deeper, the non-exposed section (A2) should also be relatively deeper. It is difficult to form the phosphorus non-exposed section (A2) deeper, and it is difficult to form the depth of the trench deeper.

Accordingly, the present invention extends in a direction in which the horizontal reinforcing member 20 disposed so as to contact the excavation ground G2 can resist the main earth pressure generated in the cast-in-place concrete pile 10 including the double eye beam. When the main earth pressure is generated in the cast-in-place concrete pile 10 containing the double-eye beam, a reaction force (①) is generated in the horizontal reinforcing member 20 as shown in FIG. 4, and the in-place concrete containing the double-eye beam Since the pile 10 is supported, the level of the passive earth pressure, that is, the length of the non-exposed section (A2), which is the near-entry length, is short compared to the exposed section (A1) of the cast-in-place concrete pile (10) including the double eye beam. It is possible to obtain the effect of enabling the digging construction to a deep depth by the supporting force of the reinforcing member 20.

In particular, by the action of the horizontal reinforcing member 20, even if there is no configuration such as an existing raker or an earth anchor, sufficient support is formed, so that it is possible to obtain an effect of enabling the digging construction to a deep depth.

In addition, the above-described supporting force acts to prevent deformation of the cast-in-place concrete pile 10 including the double eye beam due to the main earth pressure.

Meanwhile, in the present invention, an inclined reinforcing member 30 for connecting the double eye beam 10 and the horizontal reinforcing member 20 is further included.

The inclined reinforcing member 30 generates an additional supporting force as well as the force to support the cast-in-place concrete pile 10 including the double eye beam by the horizontal reinforcing member 20, and further, horizontal reinforcing as shown in FIG. Since the reaction force (②) at a position different from the member 20 supports the cast-in-place concrete pile 10 including the double eye beam, it is possible to prevent structural deformation of the double eye beam 10 due to the main earth pressure as well as the supporting force. You can also get the effect that can be obtained.

In particular, the inclined reinforcing member 30 as described above has a structure that connects the cast-in-place concrete pile 10 including the double eye beam and the horizontal reinforcing member 20, so even if it is formed smaller than the size of the conventional raker, it is sufficient Since it forms a supporting force, it is possible to secure a sufficient working space when constructing a building wall or a floor foundation.

In addition, in the present invention, the vertical resistance reinforcing pile 40 may be further coupled to the lower side of the opposite side of the horizontal reinforcing member 20 coupled to the double eye beam 10.

The vertical resistance reinforcing pile 40 is a configuration that protrudes downward from the excavation ground G2, and the reaction force (③) from the vertical resistance reinforcement pile 40 supports the horizontal reinforcing member 20 as shown in FIG. 4. Therefore, it is possible to obtain the effect of the double pile, as well as to increase the bearing capacity even when the ground is soft, so that the digging can be carried out to a deep depth when the soil barrier is constructed.

In particular, the above-described vertical resistance reinforcing pile 40 can be coupled to the lower side or side of the horizontal reinforcing member 20, and when coupled to the lower side, a greater reaction force can be obtained. Convenience can be improved.

Although the above-described embodiment has been described with respect to the most preferred example of the present invention, it is not limited to the above embodiment, and various modifications are possible within the scope of the technical spirit of the present invention. It's obvious to the technologists.

G1: Ground G2: Ground for excavation O: Space for excavation
10: On-site concrete pile with double eye beam
11: double eye beam
11a: first edition 11b: second edition 11c: third edition 11d: fourth edition
12: concrete 13: first cut surface 14: second cut surface
A1: Exposure section A2: Non-exposed section
20: horizontal reinforcing member
30: slope reinforcing member
40: vertical resistance reinforcement pile
100: Self-supporting soil barrier pile using cast-in-place concrete pile with double eye beam

Claims (6)

The third and fourth plates 11c and 11d are joined between the first and second plates 11a and 11b facing each other to form a cross-section in a ㅍ shape, but to the outside of the double eye beam 11 extending in the vertical direction. The concrete 12 is poured and cured, but includes a first cut surface 13 in which a part of the concrete 11 on the outside is cut so that a part of the double eye beam 11 on the inside is exposed. In-situ concrete with double eye beams consisting of an exposed section (A1) that is exposed to the outside up to the excavation ground (G2) and a non-exposed section (A2) that is the near entry point from the excavation ground (G2) to the location where the lower end is formed. File 10;
In-situ concrete pile (10) including double-eye beams to support the in-situ concrete piles (10) including double-eye beams by extending in the horizontal direction in which the excavation space (O) is formed to generate resistance by the main earth pressure. A horizontal reinforcing member 20 coupled to the double eye beam 11 exposed by the first cut surface 13 of );
The first cut surface 13 of the cast-in-place concrete pile 10 including the double eye beam is formed at a position where the lower side of the horizontal reinforcing member 20 can contact the excavation ground G2,
The horizontal reinforcing member 20 is a self-supporting soil barrier pile using a double eye beam containing a double eye beam characterized in that the vertical resistance reinforcing pile 40 that is proximate to the excavation ground (G2) is coupled.
delete The second cutting surface of claim 1, wherein a part of the inner double eye beam 11 is exposed above the first cutting surface 13 formed in the cast-in-place concrete pile 10 including the double eye beam. 14),
The double eye beam 11 exposed by the second cut surface 14 of the cast-in-place concrete pile 10 including the double eye beam and the inclined reinforcing member 30 obliquely coupled to the horizontal reinforcing member 20 are further included. A self-supporting soil barrier pile using a cast-in-place concrete pile with a double eye beam, which is characterized by including and consisting of.
delete According to claim 1, The vertical resistance reinforcing pile (40) coupled to the horizontal reinforcing member (20) is placed on-site concrete pile including a double eye beam characterized in that it is coupled to the lower side of the horizontal reinforcing member (20) Self-supporting soil barrier file using.
According to claim 1, The vertical resistance reinforcing pile (40) coupled to the horizontal reinforcing member (20) is placed on-site concrete pile including a double eye beam characterized in that it is coupled to the side of the horizontal reinforcing member (20) Self-supporting soil barrier file using.

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