KR20200133548A - Underaround continued wall structure using casing and pile continuous connection and method therefor - Google Patents

Abstract

The present invention relates to an underground continuous wall using continuous connection of casings and piles and a construction method thereof, wherein the piles can be continuously constructed by using a cutoff guide means while the casings are continuously constructed and connected under the ground, thereby effectively securing cutoff performance. The underground continuous wall allows the piles to be continuously constructed and connected while using the casings without using a hollow wall retention agent such as bentonite liquid, thereby increasing pile construction efficiency and surely securing cutoff performance.

Description

Underground continuous wall using casing and pile connection and its construction method {UNDERAROUND CONTINUED WALL STRUCTURE USING CASING AND PILE CONTINUOUS CONNECTION AND METHOD THEREFOR}

The present invention relates to an underground continuous wall using a casing and a continuous connection of piles, and a construction method thereof. More specifically, it relates to an underground continuous wall using a casing and a continuous connection of piles that can effectively secure ordering performance by continuously constructing a pile using an order guide means while continuously connecting the casing to the underground, and a construction method thereof.

1A is a construction diagram of an underground wall according to a conventional soil cement pile.

Soil cement pile forms a perforated hole in the ground, and a casing is inserted into the perforated hole so that the hollow wall of the perforated hole does not collapse.

Accordingly, before the casing is filled with soil cement and hardened, the casing is pulled out again to continuously construct the soil cement pile.

At this time, the soil cement pile is constructed so that the sides are overlapped with each other to secure the order performance between the soil cement pile and the soil cement pile.

1B is a construction diagram of an underground wall using a conventional PC pile.

In other words, it is a method of continuously constructing underground PC files by contacting each other with a rectangular cross-section, and injecting grouting to secure order performance.

This method has the advantage of reducing the amount of PC file construction compared to the case of overlapping construction because PC files do not overlap each other, but there is a disadvantage in that there is a limit to securing order performance. Casing is used to insert and install it.

Figure 1c is a construction diagram of inserting a PC wall segment into the ground without using a conventional casing.

In other words, the casing is used to maintain the hollow wall of the perforated hole, and since excavation equipment, insertion equipment, etc. are required, trench excavation is carried out in the ground, and the hollow wall is maintained by filling the hollow wall retaining agent such as bentonite solution.

As a result, the PC wall segment is connected to the trench excavation hole, and the construction is carried out continuously.The problem is that a facility for manufacturing and recovery post-treatment of an empty wall retaining agent such as bentonite solution is required, resulting in reduced economic efficiency and contamination of the ground during the facility operation. There is a disadvantage in that environmental pollution problems such as the problem occur.

Korean Patent No. 10-1559962 (Name of invention: underground wall construction method using a file, publication date: February 3, 2015) Korean Patent No. 10-1792844 (Name of invention: underground structure construction method using main heat-type wall and underground structure using the same, publication date: November 2, 2017)

Accordingly, the present invention provides a casing that improves pile construction efficiency and securely secures order performance by allowing various piles to be continuously connected while using a casing without using an empty wall retaining agent such as bentonite. It is a task to solve the provision of the used main heating wall and its construction method.

The underground continuous wall and its construction method using the continuous connection of the casing and the pile of the present invention to achieve the above task

(a) inserting and installing the first casing of the closed cross section into the perforated hole (H) formed in the ground; (b) inserting and installing a pile inside the first casing, wherein the casing connection part is formed on the outer surface and the order guide part is formed on the connection end surface (A); (c) pulling out the first casing so that the casing connection portion and the order guide portion are exposed; (d) While forming a perforated hole (H) adjacent to the exposed order guide portion, the exposed casing connection portion inserts and installs one-side open casing guided by a vertical portion, thereby creating an inner space by a casing formed of a vertical portion and an arc portion Forming; And (e) using the casing inner space, including the step of successively lateral connection of the additional pile using the order guide to the connecting end surface (A) of the pile first installed, repeating steps (a) to (e) Thus, the pile is side-connected to the perforated hole (H) of the ground (G) so that the casing constructed as a continuous underground wall and the underground continuous wall using the continuous connection of the pile are constructed.

According to the underground continuous wall and its construction method using the casing and the continuous connection of the pile of the present invention, the pile can be laterally connected while the casing is recovered after use, so that the amount of pile construction can be optimized. Wall construction becomes possible.

According to the main column type wall using the casing of the present invention and the construction method thereof, since a separate guide unit is not required, since the connection construction is performed using a water shielding unit, a quick and economical main column type wall construction is possible.

According to the underground continuous wall and its construction method using the casing and the continuous connection of the pile of the present invention, it is possible to use both a concrete pile or a steel pile, the versatility is increased, and very efficient main column type wall construction is possible.

1A is a construction diagram of an underground wall according to a conventional soil cement pile,
1B is a construction diagram of an underground wall according to a conventional PC file,
Figure 1c is a construction diagram of inserting a PC wall segment into the ground without using a conventional casing,
Figures 2a, 2b, 2c, 2d and 2e are the construction and construction diagram of an underground continuous wall using the continuous connection of the casing and the pile of the present invention,
3A and 3B are flow charts of a method for constructing an underground continuous wall using a continuous connection of a casing and a pile.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are assigned to similar parts throughout the specification.

Throughout the specification, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components unless otherwise stated.

[Underground continuous wall 100 using continuous connection of casing and pile of the present invention]

2A, 2B, 2C, 2D, and 2E show the construction and construction of an underground continuous wall using a continuous connection of a casing and a pile of the present invention.

The underground continuous wall 100 is a continuous by side-connecting the pile 130 inserted into the casing while maintaining the hollow wall using the casing 110 in the ground G. When inserting the pile at the side connection part, the guide The ordering performance can also be secured by using the order guide part 140 which serves as the ordering means while playing a role.

In other words, there was a construction example in which piles were side-connected with each other using a hollow wall retaining agent such as bentonite solution, but there was a problem that it was difficult to solve the equipment problem and environmental pollution problem. It is also designed to solve the problem of not sufficiently securing order performance.

Accordingly, the underground continuous wall 100 includes a casing 110, a casing connection 120, a pile 130, and a guide guide 140 as shown in FIGS. 2A, 2B, and 2C.

First, as shown in FIGS. 2A, 2B, and 2C, the casing 110 is inserted while forming a perforated hole H in the ground G to maintain the hollow wall state of the perforated hole.

At this time, the drilling hole (H, dotted line mark) uses an excavator (not shown) equipped with an extension bit, and the casing 110 is constructed so that the casing 110 is inserted into the ground while excavating.

Accordingly, the casing 110 is connected to the rear end of the excavator, and the extension bit at the tip has a diameter larger than the diameter of the casing 110. Accordingly, since the diameter of the perforated hole (H, dotted line) formed by the expansion bit is larger than the diameter of the casing 110, the casing 110 can be inserted by its own weight along with the excavation of the excavator. The topography generated by excavation is also performed.

The casing 110 is formed of a vertical portion 111 and an arc portion 112, as shown in FIGS. 2A and 2B, and guides to the casing connection portions 120 formed on both outer surfaces of the pile 130. And is inserted into the perforated hole (H). That is, one side is formed with one side open cross-section opened by both vertical portions.

Accordingly, the casing connection portion 120 is formed on both outer surfaces of the flange of the pile 130 as shown in FIGS. 2A, 2B, and 2C so that the casing guide portion 121 extends laterally.

Accordingly, insert fixing portions 122 are formed on both outer surfaces, and as the fixing bolt 123 is fastened to the insert fixing portion 122, the casing guide portion 121 can be positioned on both outer surfaces. .

Accordingly, a spacer 124 is used so that the casing guide portion 121 can be spaced apart from both outer surfaces, and the fixing bolt 123 passes through the casing guide portion 121 and the spacer 124, and the insert fixing portion ( 122).

As the spacer 124, a block having a certain thickness may be used, and the insert fixing part 122 is installed on the pile 130 in advance, and a threaded part is formed inside so that the fixing bolt can be fastened. You just need to expose it on the outer surface.

In addition, the casing guide portion 121 is a vertical plate that extends over the entire extension length of the pile 130, and a guide portion 125 is formed at the end thereof, so that the vertical portion 121 of the casing 110 that is laterally connected is guided. It can be inserted into the ground.

That is, in the present invention, the casing 110 is not simply inserted into the perforated hole of the ground, but is connected to be constructed so that the lateral connection of the pile 130 is also possible while the hollow wall is continuously maintained.

At this time, the casing connection 120 may be formed in advance on the outer surface of the flange 130 of the pile, but the position and size may be determined so as not to interfere with the perforated hole H that is laterally installed, and the insert fixing part 122 is the pile 130 You can form a plurality of them corresponding to the extension length of ).

The pile 130 is constructed by inserting it into a perforated hole (H) formed in the ground, as shown in FIGS. 2A, 2B, and 2C, but is formed as a pile wall continuously constructed by lateral connection as an underground continuous wall.

As the pile 130, it is preferable to use a precast concrete pile so that the casing connection portion 120 and the order guide portion 140 to be described later can be formed, but a steel pile as shown in FIG. 2E is also possible.

In FIGS. 2A and 2B, it can be seen that a PC file having an H-shaped cross section formed by both flanges and an abdomen is used as the file 130.

Accordingly, it can be seen that the casing connection portion 120 is formed in advance on the outer surfaces of the flanges 131, and the order guide portion 140 is formed on both flange connection end surfaces (A) to be exposed.

The order guide part 140 is for lateral connection of the pile 130 to each other, as shown in FIGS. 2A, 2B, 2C, and 2D. For example, one side of the file 130 includes a male staff tube insertion pipe 143 and a vertical plate. The insertion part 144 is formed, and a cylindrical guide part 141 and both horizontal guide parts 142 are formed corresponding to the other side file 130 that is laterally connected.

Accordingly, according to FIG. 2D, the order guide part 140,

The cylindrical guide part 141 and both horizontal guide parts 142 are integrally embedded into the inside of the flange 131, but the opening S2 formed by the both horizontal guide parts 142 is the flange 131 connection end surface It can be seen that it is exposed from the (A) side.

Accordingly, an opening (S2) by both horizontal guide portions 142 is formed on the connecting end surface (A) of the flange 131 and a vertical hole by the cylindrical guide portion 141 communicating with the opening opposite the opening (S2). It can be seen that (S3) is being formed.

Accordingly, the cylindrical guide part 141 is inserted while the male staff tube insertion pipe 143 is guided downward, and the vertical plate insertion part 144 is guided and inserted into both horizontal guide parts 142.

Since the male staff tube insertion pipe 143 and the vertical plate insertion part 144 are integrated, in the end, the male staff tube insertion pipe 143 and the vertical plate insertion part 144 are in the cylindrical guide part 141 and both horizontal guide parts 142. It can be seen that the guide of the files 130 adjacent to each other is possible by inserting ).

Cylindrical guide part 141, both horizontal guide part 142, male staff tube insertion pipe 143 and vertical plate insertion part 144 may all be made of steel, and the flange 131 corresponding to the extension length It can be seen that it is formed to have an extended length.

Accordingly, the cylindrical guide portion 141 and both horizontal guide portions 142 are formed to be embedded in one flange 131, and the vertical plate insertion portion 144 is partially embedded in and fixed to the other flange 131 It can be seen that the insertion tube 143 and the vertical plate insertion portion 144 are partially formed to be exposed.

At this time, it can be seen that the filling hole 145 is formed in the male staff tube insertion pipe 143.

Accordingly, as the filling material 146 is filled with high pressure into the male staff tube insertion pipe 143, the filler material 146 fills the inside of the male staff tube insertion pipe 143, and through the filling hole 145, the male staff tube insertion pipe 143 ) And the space between the cylindrical guide part 141 (S4), so that the order by the filler 146 sprayed by high pressure is also possible,

As a result, it can be seen that the pile 130 adjacent to the pile 130 constructed first by the order guide unit 140 is guided and constructed.

Further, the water expansion index member 147 is attached to surround the male staff tube insertion pipe 143 and a part of the vertical plate insertion part 144 exposed to the whole, and also the end of the embedded vertical plate insertion part 144 The water-stop material 147 is further formed to reliably secure waterproof performance.

Accordingly, the water expansion index material 147 formed at the end of the buried vertical plate insertion part 144 may be formed by placing concrete inside the formwork in advance when manufacturing the pile 130 and pouring concrete, and the male staff tube insertion pipe 143 ) The water expansion index material 147 formed to surround the entire and exposed vertical plate insertion part 144 is to be formed in advance in the factory, but can be formed at the site if necessary, and the water expansion index material 147 is water When it comes in contact with, it expands and fills the space.

Accordingly, in the present invention, it can be seen that the order of the piles 130 adjacent to each other is also possible.

Thus, the present invention is to penetrate through the connection portion of the flange 131, which is the connection portion of the pile 130, the groundwater lamp (W),

First, the groundwater lamp (W) is waterproof by the expansion of the water expansion index member 147 as it comes into contact with the water expansion index member 147,

Second, since the male staff tube insertion pipe 143 and the vertical plate insertion part 144 are arranged to block the connecting end surfaces of both flanges, the groundwater lamp (W) cannot otherwise penetrate and is waterproof,

Third, the groundwater lamp (W) is additionally waterproofed by the filler 146 filled in the cylindrical guide part 141 and both horizontal guide parts 142, the male staff tube insertion pipe 143 and the vertical plate insertion part 144. It can be seen that.

2E is another embodiment of an underground continuous wall 100 using a continuous connection of a casing and a pile of the present invention, in which the pile 130 is a steel pile, not a concrete pile, and there are some differences in the order guide part 140 have.

That is, the pile 130 is made of, for example, an H-type steel pile. Accordingly, the casing connection part 120 is formed on both outer surfaces of the flange of the pile 130, as shown in FIG. 2E, so that the casing guide part 121 Set it to extend,

The fixing bolts 123 are fastened through both outer surfaces of the flange 131 so that the casing guide portion 121 can be positioned on both outer surfaces.

Accordingly, a spacer 124 is used so that the casing guide portion 121 can be spaced apart from both outer surfaces, and the fixing bolt 123 passes through the casing guide portion 121 and the spacer 124 to the flange 131 It can be seen that it is directly connected to.

In addition, the order guide part 140 is a male and female connection that connects the connection end faces (A), which are both flange ends, to each other, and is installed adjacent to each other while the pile is guided. You can use it.

[Underground continuous wall construction method using continuous connection of casing and pile of the present invention]

3A and 3B show a flow chart of a method of constructing an underground continuous wall using a continuous connection of a casing and a pile.

In the underground continuous wall construction method, the casing 110 is laterally connected to each other using the casing connection 120 formed on both outer surfaces of the pile 130 so that the pile 130 is continuously lateral from the inside of the casing 110. While securing space for connection and installation, the empty walls are also maintained. Accordingly, the pile 130 is guided to the pile 130 constructed first using the order guide part 140 so as to be continuously laterally connected while also securing order performance.

Accordingly, as shown in FIG. 3A, the ground G is excavated downward using an excavator (not shown) to form a perforated hole H having a certain diameter, and the first casing 110a is connected to the rear end of the excavator. The first casing 110a is inserted and installed in the perforated hole H by the operation. At this time, the first casing (110a), while the casing 110 of the present invention is formed of a vertical portion 111 and an arc portion 112, for example, a closed cross section, for example, a steel pipe formed in a circular shape may be used.

Next, the pile 130 of the present invention is first inserted and installed inside the first casing 110a. At this time, it can be seen that the pile 130 has a casing connection 120 formed laterally on the outer side of the flange, and the order guide 140 is also formed on the connection end A of the pile, as described above. have.

The casing connection part 120 includes a spacer 124 having a bolt hole communicating with the insert fixing part 122 formed buried in the flange 131, and a casing guide part having a bolt hole communicating with the insert fixing part 122 (121) is formed spaced apart by spacers on both outer surfaces, and the fixing bolt 123 passes through the casing guide part 121 and the spacer 124 and is fastened to the inner threaded part of the insert fixing part 122. Accordingly, it can be seen that the casing guide part 121 extends laterally, but is located inside the casing 110.

Next, the first casing 110a is pulled out and recovered, and the casing 110 of the present invention is constructed by being guided to the casing connecting portion 120, but the order guide portion 140 formed on the connecting end surface of the pile The cylindrical guide part 141 is exposed. That is, when the first casing 110a is pulled out and recovered, the flange of the initially constructed pile 130 comes into contact with the empty wall, so that the empty wall does not collapse rapidly, and the casing connection 120 formed in the pile and The order guide part 140 of the connection end surface A is exposed.

Accordingly, the vertical portion 111 constituting the casing 110 is guided to the guide portion 125 formed at the end of the casing guide portion 121 of the casing connecting portion 120, and the casing of the present invention is a first casing ( 110a) is connected and constructed, and in this process, the arc part 112 of the casing 110 naturally acts as a new casing.

The additional drilling hole H by the excavator allows the cylindrical guide part 141 of the order guide part 140 to be exposed, but is constructed close to the first drilling hole.

Next, a new pile 130 is laterally connected to the initially constructed pile 130 using the exposed order guide part 140 to perform construction.

This is because the vertical plate insertion portion 144 and the male staff tube insertion pipe 143 constituting the order guide portion 140 are exposed on the connection end surface of the first pile 130, the vertical plate insertion portion 144 ) And the cylindrical guide part 141 and both horizontal guide parts 142 formed on the connection end surface (A) of the other side file 130 that are laterally connected to the male staff tube insertion pipe 143 are inserted downward from the top. You just need to construct it.

At this time, since the filling hole 145 is formed in the male staff tube insertion pipe 143, the filling material 146 is inserted into the filling hole 145, so that the ordering performance can be secured together with the water expansion index material 147. do.

Next, as shown in FIG. 3B, the casing 110 of the present invention is additionally constructed on the side of the other side of the pile 130 by using the casing connection part 120 while the order guide part 140 is exposed so that the pile 130 When the lateral connection is made to be constructed as an underground continuous wall, the casing 110 of the present invention is recovered and reused.

As a result, the pile 130 is continuously formed inside the perforated hole (H), and concrete is additionally filled in the pile interior (S1) of the underground continuous wall, so that the underground continuous wall of the present invention is constructed as a permanent wall rather than a temporary facility. So that it is constructed differently from conventional soil cement.

In the case of using the pile 130, which is a steel pile according to FIG. 2E, and using the order guide member 140, which is a male and female connection means, the same construction may be performed. That is, even when a steel pile is used, only the presence or absence of the insert fixing part 122 is different in the fixing means of the casing connection part 120, and the order guide member 140 is the male and female connection means, so it is necessary to construct the same.

The above description of the present invention is for illustrative purposes only, and those of ordinary skill in the art to which the present invention pertains will be able to understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as being distributed may also be implemented in a combined form.

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

100: underground continuous wall
110: casing 110a: first casing
111: vertical part 112: arc part
120: casing connection part 121: casing guide part
122: insert fixing portion 123: fixing bolt
124: spacer 125: guide portion
130: pile 131: flange portion
140: order guide part 141: cylindrical guide part
142: horizontal guide part 143: male staff tube insertion pipe
144: vertical plate insertion portion 145: charging hole
146: filler 147: water expansion index material

Claims (10)

(a) inserting and installing a first casing (110a) having a closed cross section into a perforation hole (H) formed in the ground;
(b) inserting and installing a pile 130 in which the casing connection 120 is formed on the outer surface of the first casing 110a and the order guide 140 is formed on the connection end surface A;
(c) pulling out the first casing (110a) so that the casing connection portion 120 and the order guide portion 140 are exposed;
(d) While forming a perforation hole (H) adjacent to the exposed order guide portion 140, the exposed casing connection portion 120 by inserting and installing the one-side open casing 110 guided by the vertical portion 111 , Forming an inner space by the casing 110 formed of the vertical portion 111 and the arc portion 122; And
(e) continuously lateral connection of the additional pile 130 using the order guide 140 to the connection end surface (A) of the pile 130 installed first using the inner space of the casing 110; Construction method of an underground continuous wall using a continuous connection of a casing and a pile including. The method of claim 1,
The diameter of the hole (H) in the step (a) is larger than the diameter of the first casing 110a by using an excavator in which an expansion bit is formed at the front end and the first casing 110a is connected to the rear end. Underground continuous wall construction method using a casing and a continuous connection of piles to allow the first casing 110a to be installed while excavating the ground. The method of claim 1,
In step (a),
The casing connection 120 formed on the outer surface of the pile 130,
Insert fixing part 122 formed on the outer surface of the pile; And a fixing bolt 123 fastened to the insert fixing part 122 so that the casing guide part 121 is positioned on both outer surfaces.
The casing guide portion 121 is a vertical plate extending over the entire extension length of the pile 130, and a guide portion 125 is formed at the end thereof, so that the vertical portion of the casing 110 connected laterally in step (d) ( 121) is a continuous underground wall construction method using a casing and a continuous connection of piles to be guided and inserted into the ground. The method of claim 1,
In step (a),
The order guide portion 140 formed on the connecting end surface (A) of the pile 130,
The cylindrical guide part 141 and both horizontal guide parts 142 are integrally embedded and installed into the inside of the flange 121 of one pile, and both horizontal guide parts 142 to the connecting end surface (A) of the flange 121 ) To form the opening (S2) and to form a vertical hole (S3) by a cylindrical guide portion 141 communicating with the opening opposite the opening (S2),
One side of the vertical plate insertion part 144 is buried in the connection end surface of the flange 121 of the other side of the pile 130, and the other side protrudes from the connection end surface and inserts a male staff cylinder with a filling hole 145 formed at the end. The tube 143 is integrally formed so that the male staff tube insertion tube 143 with the filling hole 145 is guided and inserted into the vertical hole S3, and the exposed vertical plate insertion part 144 is an opening Guided to (S2) and inserted,
In step (e), the casing that connects the additional pile 130 to the side by using the order guide part 140 on the connection end surface (A) of the pile 130 installed first and the underground continuation using continuous connection of piles Wall construction method. The method of claim 4,
By filling the inside of the male staff tube insertion pipe 143 at high pressure, the filler 146 fills the inside of the male staff tube insertion tube 143, while the cylindrical guide part 141 and the male staff tube insertion tube 143 are filled through the filling hole 145. ) The underground continuous wall construction method using a casing and continuous connection of piles so that the interspace (S4) is filled, so that the side-connected pile 130 can secure order performance at the connection end surface. The method of claim 3,
The file 110 of step (b) is
Construction method of an underground continuous wall using a casing using a precast concrete pile including a PC pile, which is an H-shaped cross section formed by both flanges and an abdomen, and a continuous connection of piles. The method of claim 1,
The file 110 of step (b) is
Use a steel pile with H-shaped cross section formed by both flanges and abdomen,
In the step (a), the order guide part 140 formed on the connection end surface (A) of the pile 130 is a male and female connection part that connects the connection end surface (A), which is both flange ends, to each other, while the pile is guided. An underground continuous wall construction method using a casing and a continuous connection of piles using a water expansion agent attached to the male and female connections for the order to be installed adjacent to each other. The method of claim 7,
The casing connection 120 formed on the outer surface of the pile 130,
Includes a fixing bolt 123 fastened to the flange of the pile so that the casing guide part 121 can be positioned on both outer surfaces, and the casing guide part 121 extends over the entire extension length of the pile 130 As a vertical plate, the guide portion 125 is formed at the end, so that the vertical portion 121 of the casing 110 that is laterally connected in step (d) is guided to be inserted into the ground, and thus the casing guide portion 121 Underground continuous wall construction method using a casing and a continuous connection of piles using a spacer 124 to be spaced apart from both outer surfaces. The method of claim 1,
After the step (e), concrete is additionally filled in the inside (S1) of the pile 130 of the underground continuous wall formed by connecting the pile 130 to the side, so that the underground continuous wall is constructed as a permanent wall, and Construction method of an underground continuous wall using continuous connection of piles. By repeating the steps (a) to (e) of claim 1,
Underground continuous wall using a casing and continuous connection of piles 130 is side-connected to the perforated hole (H) of the ground (G) to be constructed as a continuous underground wall.

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