KR102626363B1 - File with enlarged socket connector and the construction method thereof - Google Patents

Abstract

The efficiency of load transfer can be increased by using the enlarged socket part of the connection between the first casing and the first casing with different diameters, and the rigidity of the connection part and connection work can be made effective by adding more casing couplers to the enlarged socket part. It relates to a pile connected using an enlarged socket portion and a method of constructing the same. The pile connected using the enlarged socket portion is connected using an enlarged socket portion that is constructed to be inserted into a drilling hole formed in the ground (G) by connecting casings to each other. In the file, the enlarged socket portion is connected between a first casing and a second casing having different diameters, and the first connection portion has a diameter corresponding to the first casing having a larger diameter and a diameter larger than the first casing. This is in the form of a socket tube with a second connection part having a diameter corresponding to the small second casing, and a tapering part is formed in the middle between the first connection part and the second connection part.

Description

A file connected using an enlarged socket and its construction method {FILE WITH ENLARGED SOCKET CONNECTOR AND THE CONSTRUCTION METHOD THEREOF}

The present invention relates to a file using an enlarged socket unit. More specifically, the efficiency of load transfer can be increased by using the enlarged socket part of the connection between the first casing and the first casing with different diameters, and the rigidity of the connection part and connection work can be improved by adding more casing couplers to the enlarged socket part. This relates to a pile connected using an effectively enlarged socket and its construction method.

Figure 1a is an example of connecting the casings 11 and 12 using a conventional enlarged socket portion 13.

The casing is made by connecting the first casing (11), the intermediate casing (12), and the second casing (13) to each other by welding using an enlarged socket portion (13).

At this time, the first casing 11 and the first casing 13 are casings with the same diameter, and the middle casing 12 has a diameter smaller than the diameter of the first casing 11 and the first casing 13. You can see that it is a casing.

Accordingly, an enlarged socket portion 13 is used to connect the first casing 11 and the intermediate casing 13, which have different diameters, and the first casing 12 and the intermediate casing 13, which also have different diameters. ) can be seen that the same enlarged socket portion 13 is used to connect them to each other.

At this time, since the first and second casings 11 and 12 connected to each other in the enlarged socket portion 13 have different diameters, the connection stiffness acting on the connection portion of the first and second casings 11 and 12 changes rapidly. In order to prevent this, it can be seen that the tapering portion 14 is formed to gradually reduce the load transferred from the large diameter casing to the small diameter casing.

Furthermore, it can be seen that the enlarged socket portion 13 is connected to the first and second casings 11 and 12 by welding them in contact with each other.

Figure 1b is an example of connecting the first and second casings 21 and 22 using a conventional curved connection plate 23.

First, the first and second casings 21 and 22 do not have different diameters but have the same diameter, and in this case, the enlarged socket portion 13 in FIG. 1A is not used.

After bringing the first and second casings 21 and 22, which have the same diameter, into contact with each other, the connection portions of the first and second casings 21 and 22 are spaced apart so that the curved connection plate 23 passes through,

It can be seen that the first and second casings 21 and 22 of the same diameter are connected to each other by welding both ends of the curved connection plate 23 to the outer peripheral surface of the first and second casings 21 and 22.

Figure 1c is an example of connecting the first and second casings 31 and 32 using a conventional internal socket connector 33.

It can be seen that the first and second casings 31 and 32 are also casings with the same diameter as shown in Figure 1b, and are welded from the outside to connect the first and second casings 31 and 32 with the same diameter to each other. Adopt the same method, but

It can be seen that the internal socket connector 33, which is set to lighten the connection portion of the first and second casings 31 and 32 on the inside, is used.

Accordingly, the internal socket connector 33 is a connector with a diameter that can be inserted into the inner surfaces of the first and second casings 31 and 32 having the same diameter, and the connection flange 34 is roughly in the middle of the ring shape. You can see that it protrudes as one piece.

Accordingly, the first and second casings 31 and 32 are brought into contact with the protruding connecting flange 34, and then the connecting flange 34 and the first and second casings 31 and 32 are welded to each other from the outside. Able to know.

Accordingly, conventional casings with different diameters are manufactured with an enlarged socket part 13 and an internal socket connector 33 to connect the casings to each other, and the enlarged socket part 13 has a tapering part 14 to form a curved area. It can be seen that the main focus is on how the casing can be seated, and that the internal socket connector 33 has limitations in being applicable to connecting casings of the same diameter.

Japanese Patent No. 7184285 (Title of invention: Steel pipe diameter conversion ring, Publication date: August 20, 2020) Republic of Korea Patent Publication No. 10-2014-0001554 (Title of invention: Pile construction method using steel pipe connection structure of rotary pile, Publication date: January 7, 2014) Republic of Korea Patent Publication No. 10-2022-0001175 (Title of invention: Casing coupler for micro files, Publication date: January 5, 2022)

Accordingly, the present invention effectively changes the shape and thickness of the enlarged socket portion where the connection stiffness can be gradually changed as the casings penetrated over a certain penetration depth have different diameters, while micropiles are located inside the interconnected casings, and head reinforcement is provided. This is a technical problem to be solved by providing a connected pile and its construction method using an enlarged socket section that can be constructed as a structural foundation pile using any means.

In addition, the present invention is a technical problem aimed at solving the provision of a pile connected using an enlarged socket part that can more effectively resist rapid changes in the connection stiffness of the first and second casings and a method of constructing the same. do.

In addition, the present invention provides a pile connected using an enlarged socket part and a method of constructing the same, which enables a more effective connection by combining an enlarged socket part and a casing coupler to further secure the connection performance of the enlarged socket part and the first and second casings. The provision is made as a technical problem to be solved.

The pile connected using the enlarged socket part of the present invention for achieving the above problem is a pile connected using the enlarged socket part constructed to be inserted into a drilling hole formed in the ground (G) by connecting the casings to each other, the enlarged socket The part is to connect between the first casing and the second casing having different diameters, with the first connection having a diameter corresponding to the first casing having a larger diameter and the second casing having a smaller diameter than the first casing. It is in the form of a socket pipe with a second connection part having a diameter of T2), and the enlarged socket part is combined with a casing coupler to connect the enlarged socket part and the first and second casings to ensure connection performance, and the casing coupler is connected to the outside of the first and second casings. The first and second connection rings are formed to have the same thickness, the protruding connection flanges are made to protrude inside the first and second casings, and the end surfaces of the first and second casings are supported on both sides of the protruding connection flanges. However, both sides of the protruding connection flange are formed as tapering portions.

The connected pile construction method using the enlarged socket part of the present invention to achieve the above problem is (a) forming a drilling hole in the soil layer (G2) and the rock layer (G1) of the ground (G), and forming a first hole in the drilling hole. ,2 Installing the casing connected to the casing so that the head of the casing is exposed to the upper surface of the ground (G); (b) installing head reinforcement means on the casing exposed above the surface of the ground (G), wherein the first and second casings in step (a) have different diameters, and the first and second casings have different diameters, and the first and second casings have different diameters. 1 The connection is made using an enlarged socket part in the form of a socket tube having a first connection part with a diameter corresponding to the casing and a second connection part with a diameter corresponding to a second casing with a smaller diameter than the first casing, wherein the enlarged socket part is, A connection is made between a first casing and a second casing having different diameters, wherein the first connection has a diameter corresponding to the first casing having a larger diameter and a diameter corresponding to the second casing having a smaller diameter than the first casing. In the form of a socket pipe with a second connection part, a tapering part is formed in the middle between the first connection part and the second connection part, and the tapering part decreases in thickness from the first connection part to the second connection part (T1>>T2). Formed so as to secure the connection performance by connecting the enlarged socket part with the first and second casings by combining the enlarged socket part with a casing coupler, and the casing coupler connects the first and second casings to the outside of the first and second casings. The ring and the second connecting ring are formed to have the same thickness, the protruding connecting flanges are made to protrude inside the first and second casings, and the end surfaces of the first and second casings are supported on both sides of the protruding connecting flanges, Both sides of the protruding connection flange are formed as tapering portions.

According to the present invention, the extension length of the enlarged socket part is varied to maximize the tapering effect of the stiffness of the connection part of the first and second casings, and the inner diameter of the enlarged socket part is also changed to increase the connection part of the first and second casings. It is possible to provide connected piles and their construction methods using expanded socket parts that can more effectively secure rigidity.

According to the present invention, the first and second casings are connected to the enlarged socket portion, and the enlarged socket portion is welded with a plurality of connection plates along the connection surfaces of the enlarged socket portion and the first and second casings to additionally secure the rigidity of the connection portion. Using this, it is possible to provide connected files and their construction methods.

According to the present invention, the first and second casings are connected to the enlarged socket portion, and the connection performance of the first and second casings and the enlarged socket portion can be further secured by using a casing coupler, and the casing coupler is formed by using a tapered cross-section coupler. It is possible to provide a connected pile and its construction method using an enlarged socket portion that can secure more effective connection performance by allowing the first and second casings to be connected to each other by welding outside the connection area.

Figure 1a is an example of casing connection using a conventional enlarged socket portion,
Figure 1b is an example of connecting the first and second casings using a conventional curved connection plate;
Figure 1c is an example of connecting the first and second casings using a conventional internal socket connector;
Figure 2 is an example of construction of a file connected using the enlarged socket portion of the present invention;
Figures 3 and 4 are examples of connecting the enlarged socket portion and the casing of the present invention;
Figures 5a and 5b are illustrations of the connection between the enlarged socket part and the socket connection part of the present invention;
Figure 6 shows an example of a construction method of a connected pile using the enlarged socket portion of the present invention.

Below, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. In order to clearly explain the present invention in the drawings, parts that are not related to the description are omitted, and similar parts are given similar reference numerals throughout the specification.

Throughout the specification, when a part is said to “include” a certain element, this means that it may further include other elements rather than excluding other elements, unless specifically stated to the contrary.

[File (100) connected using the enlarged socket unit (140) of the present invention]

Figure 2 shows an example of construction of a pile 100 connected using the enlarged socket portion 140 of the present invention.

Referring to FIG. 2, the pile 100 is divided into a soil layer (G2) and a rock layer (G1).

The tip of the micropile 110 is supported by penetrating into the rock layer drilling hole formed in the rock layer G1 using the casing 120,

It can be seen that the micropile 110 is located inside the casing 120 that penetrates the soil layer drilling hole in the soil layer G2 above the rock layer drilling hole.

In addition, it can be seen that the casing 120 uses the first and second casings 121 and 122 connected according to the depth of penetration into the rock layer and soil,

As a means to connect the first and second casings 121 and 122 to each other, an enlarged socket portion 140 and a casing coupler 160 are used, as shown in FIGS. 5A and 5B.

In addition, referring to FIG. 2, head reinforcement means 130 are further installed on the head of the first casing 121, and the head reinforcement means ( 130) and the head of the first casing 121 are buried,

The micropile 110 and casing 120 serve to transmit the load transferred from the base plate 210 and foundation concrete 220 of the structure 200 to the soil layer (G2) and the rock layer (G1).

Referring to FIG. 2, these micropiles 110 are used by connecting using a micropile coupler 111, and a spacer 112 is installed to surround the outer circumferential surface so that the installation gap inside the casing 120 is maintained. You can see that it's happening.

Accordingly, the file 100 connected using the enlarged socket portion 140 of the present invention is intended to connect the casings 120 of different diameters.

The reason for using different casings 120 in this way is that a large load due to earth pressure occurs downward from the ground surface to a certain construction depth, but there is no significant change in the magnitude of earth pressure beyond a certain depth.

This is because the diameter of the first casing 121 near the ground surface is made larger than that of the second casing 122 located above a certain depth, so that an economical casing 120 can be used with a more efficient cross section.

Accordingly, when the diameter of the first and second casings 121 and 122 with different diameters suddenly increases or decreases at the connection area, the load is inevitably concentrated at the connection area, so the enlarged socket portion is used to effectively secure the connection rigidity. (140), and the casing coupler 160 is used to connect the enlarged socket portion 140 and the first and second casings 121 and 122 by inserting them into each other.

First, referring to FIG. 3, three embodiments of the enlarged socket portion 140 of the present invention are shown.

First, according to FIG. 3, the first embodiment 140a of the enlarged socket portion 140 is

The extension length of the enlarged socket portion 140 is relatively longer than that of the second and third embodiments (140b and 140c). As formed, the first connection portion 141 and the second connection portion 142 are in contact with the connection portion of the first casing 121 and the second casing 122, and are integrated by external welding to connect them. .

That is, the enlarged socket portion 140 according to the first embodiment (140a) has a diameter larger than that of the first connection portion 141 and the first casing 121, which have a diameter corresponding to the larger first casing 121. In the form of a socket tube having a second connection portion 142 with a diameter corresponding to the small second casing 122,

It can be seen that the tapering part 143 is formed in the middle between the first connection part 141 and the second connection part 142, and the extended length of this tapering part 143 is that of the first embodiment (140a). It is relatively thinner than the tapering portion 143 of the second and third embodiments (140b and 140c). It can be seen that it is being formed.

The enlarged socket portion 140 according to the first embodiment (140a) is preferably used when the penetration depth of the casing 120 is relatively small, and the tapering portion 143 is connected from the first connection portion 141. It is formed so that the thickness gradually decreases (T1>>T2) toward the second connection portion 142, so that connection rigidity at the connection portion can be secured more effectively.

In addition, the inlet portions of the second connection portion 142 from the first connection portion 141 are formed as inclined surfaces 144 to facilitate external welding, and the first casing 121 and the second casing 122 are stably connected to each other. You will come into contact with it.

Next, according to FIG. 3, the second embodiment 140b of the enlarged socket portion 140 is

The extension length of the enlarged socket portion 140 is set to have an extension length corresponding to the length between the first and third embodiments 140a and 140c, and a second casing is provided at the connection portion between the first casing 121 and the second casing 122. The first connection part 141 and the second connection part 142 are connected by being in contact with each other and integrated with each other by external welding, which is the same as in the first embodiment (140a).

That is, the enlarged socket portion 140 according to the second embodiment (140b) also has a larger diameter than the first connection portion 141 and the first casing 121, which have a diameter corresponding to the first casing 121. In the form of a socket pipe with a second connection portion 142 having a diameter corresponding to this small second casing 122.

It can be seen that the tapering portion 143 is formed in the middle between the first connection portion 141 and the second connection portion 142, which is the same as the first embodiment (140a).

It can be seen that the extended length of the tapering portion 143 in the second embodiment 140b is relatively longer than that in the first embodiment 140a.

In addition, the enlarged socket portion 140 according to the second embodiment (140b) is preferably used when the penetration depth of the casing 120 is relatively longer than that of the first embodiment (140a). The tapering portion 143 is formed so that the thickness gradually decreases (T1>>T2) from the first connection portion 141 to the second connection portion 142, so as to more effectively secure the connection rigidity at the connection portion. do.

Also, the inlet part of the second connection part 142 from the first connection part 141 is formed as an inclined surface 144 to facilitate external welding, and the first casing 121 and the second casing 122 are stably in contact with each other. This is the same as in the first embodiment 140a.

Next, according to FIG. 3, the third embodiment 140c of the enlarged socket portion 140 is

The extension length of the enlarged socket portion 140 is the longest compared to the first and second embodiments 140a and 140b, and the first connection portion 141 is formed at the connection portion between the first casing 121 and the second casing 122. ) and the second connection portion 142 are in contact with each other and integrated into each other by external welding, which is the same as the first embodiment (140a) and the second embodiment (140b).

The enlarged socket portion 140 according to this third embodiment (140c) also has a diameter larger than that of the first connection portion 141 and the first casing 121, which have a diameter corresponding to the larger diameter of the first casing 121. In the form of a socket pipe with a second connection portion 142 having a diameter corresponding to the small second casing 122.

It can be seen that the tapering portion 143 is formed in the middle between the first connection portion 141 and the second connection portion 142, which is the same as the first embodiment (140a) and the second embodiment (140b). There is,

It can be seen that the extended length of the tapering portion 143 is relatively longer in the third embodiment (140c) than in the second embodiment (140b), and the tapering angle of the tapering portion 143 does not change drastically. It can be seen that it is being extended gradually.

The enlarged socket portion 140 according to the third embodiment (140c) is preferably used when the penetration depth of the casing 120 is much deeper than that of the first embodiment (140a) and the second embodiment (140b). , the tapering portion 143 is formed so that the thickness gradually decreases (T1>>T2) from the first connection portion 141 to the second connection portion 142, so that the connection rigidity at the connection portion can be more effectively secured. It will be so.

Also, the inlet part of the second connection part 142 from the first connection part 141 is formed as an inclined surface 144 to facilitate external welding, and the first casing 121 and the second casing 122 are stably in contact with each other. This is the same as the first embodiment (140a) and the second embodiment (140b).

Next, referring to FIG. 4, the enlarged socket portion 140 of the present invention is welded with a plurality of connection plates 150 along the connection surfaces (L) of the first and second casings to further secure the rigidity of the connection area. You can see that it can be done.

In the case of the first embodiment 140a of the enlarged socket portion 140 of FIG. 3, the penetration depth of the casing 120 is relatively short, so the tapering portion 143 of the enlarged socket portion 140 may change rapidly. In order to reinforce the connection parts of the first and second casings 121 and 122,

It can be seen that the connecting portion is in minimal contact with the tapering portion 143 like a square piece from the outside, and the connecting plates 150 passing through the connecting portion are spaced apart and integrated by welding.

This connection plate 150 may be spaced apart and integrated along both the first connection portion 141 and the second connection portion 142 of the enlarged socket portion 140, and the first connection portion 141 and the second connection portion 142 ) can be separated and integrated on one side only.

In addition, the connection plate 150 can be integrated by welding one of the first connection portion 141 and the second connection portion 142 at the factory and welding the other one at the site.

Next, referring to FIGS. 5A and 5B, the expanded socket portion 140 and the casing coupler 160 of the present invention are combined to connect the expanded socket portion 140 and the first and second casings 121 and 122 to add connection performance. It can be seen that this is being secured.

First, the casing coupler 160 allows the first and second casings 121 and 122 with the same or different diameters to be connected and provides stable support, thereby securing additional connection performance together with the enlarged socket portion 140. It was made possible.

Accordingly, according to FIG. 5A, it can be seen that the enlarged socket portion 140 installed between the first and second casings 121 and 122 is connected to the first and second casings 121 and 122 using the casing coupler 160,

For example, after connecting the first casing 121 and the casing coupler 160 in the field and integrating the enlarged socket part 140 with the connected casing coupler 160, the second casing 122 is connected to the enlarged socket part in the field. It can be connected to (140),

After the first casing 121 and the enlarged socket part 140 are integrally connected at the factory, the casing coupler 160 is integrated into the connected enlarged socket part 140, and the second casing is connected to the integrated casing coupler 160. (122) can be connected at the factory or field.

Referring to FIG. 5A, it can be seen that this casing coupler 160 can be used in which the protruding connection flange 163 is integrally formed between the first connection ring 161 and the second connection ring 162,

After supporting the end surfaces of the first and second casings 121 and 122 on the upper and lower surfaces of the protruding connecting flange 163, respectively, the protruding connecting flange 163 of the casing coupler 160 is connected to the first and second casings 121 and 122. Just connect by welding.

Referring to Figure 5b, it can be seen that the casing coupler 160 is divided into an internal installation type or an external installation type and can be directly connected to the first casing 121 and the second casing 122.

First, it can be seen that the internally installed casing coupler 160 has a difference in thickness, especially between the first connection ring 161 and the second connection ring 162.

That is, when the thickness of the first casing 121 is thicker than the thickness of the second casing 122, the thickness of the first connecting ring 161 is formed to be smaller than the thickness of the second connecting ring 162 to ensure rapid load transfer. To prevent changes in

The end surfaces of the first and second casings 121 and 122 are supported on the protruding connection flange 163, and the protruding connection flange 163 of the casing coupler 160 is welded to the outside of the first and second casings 121 and 122 to connect them. You can see that it is being done.

That is, the first connecting ring 161 and the second connecting ring 162 serve to prevent changes in load transfer due to changes in diameter in the first or second casings 121 and 122 with relatively different diameters. As,

Accordingly, in the case of FIG. 5B, it can be seen that it is possible to respond according to the thickness of the first and second casings 121 and 122, which are simply supported by arranging the casing coupler 160 upside down. As a result, the protruding connection flange 163 protrudes and is exposed to the outside of the first and second casings 121 and 122.

In addition, according to Figure 5b, it can be seen that both surfaces of the protruding connecting flange 163 are formed with tapering portions 164 so that the end surfaces of the first and second casings 121 and 122 can be supported more stably. , for this purpose, the end surfaces of the first and second casings 121 and 122 can also be formed to be inclined.

Next, referring to FIG. 5b, the externally installed casing coupler 160 forms a first connection ring 161 and a second connection ring 162 to the same thickness on the outside of the first and second casings 121 and 122, The protruding connection flange 163 protrudes inside the first and second casings 121 and 122,

It can be seen that the end surfaces of the first and second casings 121 and 122 are supported on both sides of the protruding connecting flange 163, and that both sides of the protruding connecting flange 163 can be formed with tapering portions 164. You can.

[Construction method of connected pile 100 using the enlarged socket part 140 of the present invention]

Figures 6a, 6b and 6c show examples of the construction method of the pile 100 connected using the enlarged socket portion 140 of the present invention.

First, the construction method of the pile 100 connected using the enlarged socket part 140, the first casing 121 and the second casing 122 are combined with the enlarged socket part 140 and the casing coupler 160 (not shown). The casings 120 connected to each other are penetrated into the ground (G), and the head is exposed to the upper part of the ground (G),

The micropile 110 is located inside the casing, and the tip of the micropile 110 is supported on the rock layer G1 of the ground G, and the head reinforcement means 130 is fixed to the exposed head of the casing 120. install it,

It can be said to be a method of constructing the foundation concrete 220 of the structure so that the head reinforcement means 130 is buried after constructing the foundation plate 210 while pouring concrete inside the casing 120.

Accordingly, as shown in FIG. 6A, a drill hole (not shown) is formed in the soil layer (G2) and the rock layer (G1) of the ground (G), and the casing 120 of the present invention is inserted into the drill hole to form the head of the casing 120. It is installed so that it is exposed to the upper part of the ground surface of the ground (G).

At this time, the casing is installed so that the tip is supported on the upper surface of the rock layer (G1), and cement milk, etc. is injected into the drilling hole formed in the rock layer (G1) to support the tip of the micropile 110, which will be described later.

In addition, the hole in the soil layer G2 can be maintained as a hollow wall by inserting the casing 120 into the hole.

This casing 120 can be made by connecting and integrating the first and second casings 121 and 122 using the enlarged socket part 140 alone or using the casing coupler 160 together with the enlarged socket part 140, as shown in Figure 5a. However, in the case of FIG. 6A, it is shown that the enlarged socket portion 140 is integrated alone.

Accordingly, the first and second casings 121 and 122 have different diameters, and the first connection portion 141 and the first casing 121 have a diameter corresponding to the larger diameter of the first casing 121. It can be seen that an enlarged socket part 140 in the form of a socket tube having a second connection part 142 with a diameter corresponding to the small second casing 122 is used.

As shown in FIG. 5B, the first and second casings 121 and 122 can be connected to each other using the casing coupler 160 such as the first embodiment (140a), the second embodiment (140b), and the third embodiment (140c). It is natural that it can be done.

Next, as shown in FIG. 6b, head reinforcement means 130 are additionally installed on the casing 120 exposed above the ground surface of the ground (G).

The head reinforcement means 130 can be installed in various forms. In particular, in the present invention, the integrated micropile 110 is used.

Accordingly, the micropile 110 is a steel bar member with continuously formed threaded portions on the outer peripheral surface, and is also used by connecting using the micropile coupler 111 according to the extension length, and the spacer 112 is installed to surround the outer peripheral surface to form the casing 120. ) As we have seen, ensuring that the installation gap inside is maintained is as follows.

It can be seen that the head of the micropile 110 is located inside the casing 120 so that the head is exposed to extend further upwards of the casing 120 and is fixed through the upper plate.

In addition, the upper plate is in the form of a horizontal plate, and it can be seen that upper and lower fastening nuts are used to fasten and secure the head of the micropile 110,

From the upper surface of the upper plate, a U-shaped head reinforcing bar is integrally formed and connected through the exposed head of the casing.

The end of the head reinforcing bar that penetrates the head of the casing is fastened and fixed inside and outside the head of the casing using a through hole formed in advance in the casing to prevent it from being separated by a nut provided with an expansion plate, and the micropile (110) It can be seen that the tip of is supported on the cured cement milk of the drilling hole formed in the rock layer (G1).

Next, as shown in Figure 6c, concrete is poured into the casing 120 exposed above the surface of the ground (G), the base plate 210 is constructed, and the casing 120 and the head reinforcement means 130 are finally set. .

The casing 120 has a diameter of the area located in the soil layer G2 that decreases downward from the ground surface, and the casing 120, that is, the first and second casings 121 and 122, are connected to each other by the enlarged socket portion 140. You can see that it is.

This casing 120 has only the micropile 110 located inside, so the inside is poured with concrete to ensure the load-bearing rigidity of the pile 100,

The base plate 210 is formed by pouring concrete to a certain thickness to finish the base concrete construction surface. The concrete inside the casing and the concrete of the base plate 210 can be poured together.

Next, as shown in FIG. 6D, the foundation concrete 220 is poured on the base plate 210, and the head of the casing 120 and the head reinforcement means 130 are formed at a constant thickness so that they are embedded in the structure 200. .

At this time, the base plate reinforcement 230 can be further reinforced around the head reinforcement means 130, and the base concrete 220 is placed on the base plate 210, the head reinforcement means 130 of the casing 120, and the first The head of the casing 121 and the base plate reinforcement 230 are buried, but the base thickness according to the structure is sufficiently secured.

The description of the present invention described above is for illustrative purposes, and those skilled in the art will understand that the present invention can be easily modified into other specific forms without changing the technical idea or essential features of the present invention. will be. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive. For example, each component described as single may be implemented in a distributed manner, and similarly, components described as distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the claims described below rather than the detailed description above, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention. do.

100: file
110: Microfile
111: Micropile coupler 112: Spacer
120: Casing
121: first casing 122: second casing
130: Head reinforcement means 140: Enlarged socket part
140a, 140b, 140c: First, second, and third embodiments of expanded socket portion
141,142: 1st and 2nd connection parts of the enlarged socket part
143: tapering part 144: inclined surface
150: Connection plate 160: Casing coupler
161: first connection ring 162: second connection ring
163: Protruding connection flange 164: Tapering portion
200: Structure 210: Base plate
220: Foundation concrete 230: Foundation plate rebar
G1: Rock layer G2: Soil layer

Claims (10)

In the pile 100 connected using an enlarged socket portion 140 that is constructed to connect the casings 120 to each other and be inserted into a drilled hole formed in the ground (G),
The enlarged socket portion 140 is connected between the first casing 121 and the second casing 122 having different diameters, and has a diameter corresponding to the larger diameter first casing 121. It is in the form of a socket pipe having a first connection portion 141 and a second connection portion 142 having a diameter corresponding to a second casing 122 that is smaller in diameter than the first connection portion 141 and the first casing 121. A tapering portion 143 is formed in the middle between the two connection portions 142, and the thickness of the tapering portion 143 decreases from the first connection portion 141 to the second connection portion 142 (T1>>T2). Formed to do so,
The enlarged socket part 140 is combined with the casing coupler 160 to connect the enlarged socket part 140 and the first and second casings 121 and 122 to ensure connection performance, and the casing coupler 160 , the first connection ring 161 and the second connection ring 162 are formed to the same thickness on the outside of the first and second casings 121 and 122, and the protruding connection flange 163 is formed on the outside of the first and second casings 121 and 122. ) so that they protrude inward, and the end surfaces of the first and second casings 121 and 122 are supported on both sides of the protruding connecting flange 163, and both sides of the protruding connecting flange 163 are formed with tapering portions 164. Files connected using the enlarged socket section as possible. According to paragraph 1,
A pile connected using an enlarged socket portion in which the extension length of the tapering portion 143 extends further depending on the penetration depth of the pile 100 from the ground surface. According to paragraph 1,
The connection plate 150 is further integrated outside the connection portion of the first and second casings 121 and 122, and the connection plate 150 is integrated by spaced apart a plurality of square pieces that contact the tapering portion 143 and pass through the connection portion. A file connected using an enlarged socket. delete delete delete (a) While forming a drilling hole in the soil layer (G2) and the rock layer (G1) of the ground (G), the casing 120 to which the first and second casings 121 and 122 are connected is inserted into the drilling hole to form the casing 120. Installing the head so that it is exposed to the upper surface of the ground (G);
(b) installing the head reinforcement means 130 on the casing 120 exposed above the surface of the ground (G),
The first and second casings 121 and 122 in step (a) have different diameters, and the first connection portion 141 and the first casing 121 have a diameter corresponding to the larger diameter first casing 121. ) The second casing 122, which has a smaller diameter, is connected using an enlarged socket portion 140 in the form of a socket tube having a second connection portion 142 with a corresponding diameter,
The enlarged socket portion 140 is connected between the first casing 121 and the second casing 122 having different diameters, and has a diameter corresponding to the larger diameter first casing 121. It is in the form of a socket pipe having a first connection portion 141 and a second connection portion 142 having a diameter corresponding to a second casing 122 that is smaller in diameter than the first connection portion 141 and the first casing 121. A tapering portion 143 is formed in the middle between the two connecting portions 142, and the thickness of the tapering portion 143 decreases from the first connecting portion 141 to the second connecting portion 142 (T1>>T2). Formed to do so,
The enlarged socket part 140 is combined with the casing coupler 160 to connect the enlarged socket part 140 and the first and second casings 121 and 122 to ensure connection performance, and the casing coupler 160 , the first connecting ring 161 and the second connecting ring 162 are formed to the outside of the first and second casings 121 and 122 to have the same thickness, and the protruding connecting flange 163 is formed on the outside of the first and second casings 121 and 122. ) so that they protrude inward, and the end surfaces of the first and second casings 121 and 122 are supported on both sides of the protruding connecting flange 163, and both sides of the protruding connecting flange 163 are formed with tapering portions 164. A method of constructing connected piles using enlarged sockets as much as possible. In clause 7,
The head reinforcement means 130 in step (b) uses an integrated micropile 110,
The micropile 110 is a steel bar member with continuously formed threaded portions on the outer peripheral surface, and is used by connecting using a micropile coupler 111 according to the extension length, and a spacer 112 is installed to surround the outer peripheral surface to form a casing 120. Ensure that the installation gap inside is maintained,
The head of the micropile 110 is located inside the casing 120 so that the head is exposed to extend further above the casing 120 and is fixed through the upper plate. The upper plate is in the form of a horizontal plate, and the micropile ( 110), upper and lower fastening nuts are used to fasten and secure the head, and a U-shaped head reinforcing bar is integrally formed from the upper surface of the upper plate, penetrating through the exposed casing head, and connecting the casing head. A pile construction method connected using an enlarged socket section in which the end of the penetrating head reinforcing bar is fastened and fixed inside and outside the head of the casing using a through hole formed in advance in the casing to prevent it from being separated by a nut equipped with an expansion plate. In clause 7,
After step (b) above,
Concrete is poured into the casing 120 exposed above the surface of the ground (G) and the foundation plate 210 is constructed, and the foundation concrete 220 is poured on the foundation plate 210, but the head of the casing 120 and A connected pile construction method using an enlarged socket portion that allows the head reinforcement means (130) to be embedded in the structure (200). delete