KR20190000780A - Moduler structure for prefabricated unified deck-girder and the bridge cconstruction method using thereof - Google Patents

Abstract

A bottom plate-girder integrated assembly module according to one embodiment of the present invention includes a hollow first module portion having the shape of a trapezoid open on one side in cross section and provided with a first bottom upper plate, a first bottom lower plate smaller in width than the first bottom upper plate, a first a girder vertically interconnecting the first bottom upper plate and the first bottom lower plate and having an outer surface having a plurality of shear keys, and a first b girder interconnecting the first bottom upper plate and the first bottom lower plate and spaced apart from the first a girder; a hollow second module portion having a rectangular shape in cross section and provided with a second bottom upper plate, a second bottom lower plate, a second a girder having an outer surface having a plurality of recessed portions, and a second b girder having an outer surface having a plurality of shear keys; a third module portion having the shape of a trapezoid open on one side in cross section and provided with a third bottom upper plate, a third bottom lower plate, and a third girder interconnecting the third bottom upper plate and the third bottom lower plate, a plurality of recessed portions being provided in the outer surface of the third girder; a length direction tension member connecting each of the first module portion to the third module portion in the length direction by module of the same structure in the length direction of the first module portion to the third module portion; and a width direction tension member connecting at least two of the first module portion to the third module portion in the width direction of the first module portion to the third module portion. Preferably, the first module portion to the third module portion are interconnected by the width direction tension member and assembled by module with the recessed portions and the shear keys on abutting surfaces coupled and engaged.

Description

TECHNICAL FIELD [0001] The present invention relates to a bottom plate-girder integrated module and a bridge construction method using the same. BACKGROUND ART [0002]

The present invention relates to a bottom plate-girder integrated assembly module and a bridge construction method using the module. More particularly, the present invention relates to a bottom plate-girder integrated assembly module and a bridge construction method using the assembly module.

In general, the prefabricated superstructure of bridges is a method of constructing a structure that can shorten the construction period by constructing each segment in the factory without laying concrete in the field.

Typical construction methods for construction of superstructures include ILM (Incremental Launching Method), PSM (Precast Span Method), FCM (Free Cantilever Method) and MSS (Movable Scaffolding System). These methods are to construct the girder which is the upper structure of the bridges into several segments and to mount them on the piers, connect each segment by the prestress method, or install the mold after each step, There is a quick advantage.

However, despite the advantages of such rapid construction, the above-mentioned methods require special large-sized construction equipment and are manufactured in large bridges rather than small and medium-sized bridges because of the high manufacturing cost due to special methods for long span bridges.

In the case of short-span bridges with short bridge spans, a hollow flooring method is proposed that can be manufactured and used in a cost-saving manner by employing a prefabricated construction method. However, the hollow flooring method according to the prior art is limited to short- And there is a limit to be applied as a bridge superstructure having a span of 30M or more.

Currently, in the case of small- and medium-sized bridges with girder lengths of 30M to 60M, most of the RC girder, the PSC girder and the box girder are installed and the concrete is laid by installing the formwork for placing the bottom plate. There is a demand for a prefabricated construction method and a construction method which can shorten a construction period and ensure economical efficiency.

In addition, although the pre-cast segment connection structure according to the conventional technique developed for the purpose of constructing a bridge between heavy and medium bridges suggests an assembly method for a girder, since a bottom plate is installed after the girder is installed, There is a disadvantage that it can not be utilized sufficiently.

Korean Patent No. 10-1711202 discloses prefabricated precast concrete bridge decks.

It is an object of the present invention to provide a bottom plate-girder integrated assembly module capable of assembling a plurality of module parts in units of modules and building an upper structure of the bridge without being affected by the width and the width of the bridge, .

The bottom plate-girder integrated assembly module according to one embodiment of the present invention includes a first bottom floor plate, a first bottom floor plate having a width narrower than the width of the first floor top plate, a first floor bottom plate, A first la girder having a plurality of shear keys on the outer surface thereof and a first b girder connecting the first bottom floor plate and the first bottom floor plate so as to be spaced apart from the first la girder and having a trapezoidal cross section with one side opened, 1 module part; A second module having a second bottom plate, a second bottom plate, a second girder having a plurality of recesses on an outer surface thereof, and a second b-girder having a plurality of shear keys on the outer surface thereof; A third bottom floor plate, a third bottom floor plate, and a third girder connecting the third bottom floor plate and the third bottom floor plate, and having a trapezoidal cross section with one side opened and a plurality of concave portions provided on the outer surface of the third girder 3 module section; And a longitudinal strain member which longitudinally connects each of the first module unit to the third module unit in units of modules having the same structure in the longitudinal direction of the first module unit to the third module unit; And a width direction tension member connecting at least two of the first module part to the third module part in a width direction of the first module part to the third module part, wherein the first module part to the third module part It is preferable that the plurality of concave portions provided and the plurality of shear keys are engaged with each other and are connected to each other by the widthwise tension members and assembled in units of modules.

Here, it is preferable that the shear key has a block-like structure having a trapezoidal cross section whose width is narrowed in a protruding direction, and the recess is a groove having a trapezoidal cross section whose width is narrowed in a direction in which the shear key is inserted.

In one embodiment of the present invention, it is preferable that a plurality of width direction through holes through which the width direction tension members are inserted are provided in the first module module to the third module module.

In addition, the first module portion to the third module portion may be provided with a plurality of longitudinal through holes into which longitudinal strain members are inserted.

In the first module part, a plurality of first ribs for connecting the first bottom floor plate and the first bottom floor plate are provided on the first b-girder, and a plurality of widthwise tension members penetrate the plurality of first ribs, As shown in Fig.

In the third module part, a third girder is provided with a plurality of third ribs connecting the third bottom floor plate and the third bottom floor plate, and the plurality of width direction tension members penetrate the plurality of third ribs, As shown in Fig.

(A) a first module section, a second module section, and a third module section of the bottom plate-girder integrated assembly module according to the first aspect of the present invention, A step of fabricating; (B) at least two of the first to third modules are arranged in parallel, and at least two of the first to third module parts are assembled so as to be in contact with each other so that a shear key provided on a face contacting each other is inserted into the recess step; (C) tensioning the longitudinal strain members inserted into at least two of the first to third module portions; And (D) tensioning the width direction tension member by inserting at least two of the first to third module parts in the width direction.

In addition, it is preferable that at least two of the first module part to the third module part assembled in step B are arranged in series.

The present invention can construct an upper structure of a bridge by assembling a plurality of module units on a module basis without being influenced by the width of the bridge and the span of the bridge,

The present invention can be variously adjusted by the combination of the number of the first to third module units. Thus, the present invention can maintain and / or restore the span of various sizes during maintenance of the upper structure of the bridge.

According to the present invention, the first to third module units are assembled in module units, and the structural performance can be exerted through the joining of each module structure by the prestressing method, and the simplification of the construction method, the shortening of the construction period, It is possible to obtain the effect of saving of

Unlike the construction of the upper structure of a conventional bridge, since the bottom plate and the girder are integrally provided in the first module unit to the third module unit, the construction of the bottom plate of the upper structure of the bridge is unnecessary, Can be improved.

Since the fabrication steps are manufactured in the factory, the quality can be easily secured and assembled in the field using simple equipment. Therefore, it is possible to secure the designing sectional force and to provide safe and economical, Length and bridge width can be adjusted as desired.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view illustrating a connection state of a bottom plate-girder assembly module according to an embodiment of the present invention before assembly. FIG.
FIG. 2 is a schematic view illustrating an assembled state of a bottom plate-girder assembly module according to an embodiment of the present invention.
FIG. 3 is a schematic view illustrating a connection state of a bottom plate-girder integrated assembly module viewed in a direction A in FIG. 1 before assembly.
Fig. 4 schematically shows a cross-sectional view taken along line XX of Fig.
Fig. 5 schematically shows a cross-sectional view along YY in Fig. 1;
FIG. 6 schematically shows a cross-sectional view of a first module part to a third module part according to an embodiment of the present invention. FIG.
7 schematically shows a cross-section of a shear key and a recess applied in an embodiment of the present invention.
8 to 10 schematically show an example of a structure that can be assembled by the first module part to the third module part.

Hereinafter, a bottom plate-girder integrated assembly module according to an embodiment of the present invention and a bridge construction method using the same will be described with reference to the accompanying drawings

The bottom plate-girder integrated assembly module 100 according to an embodiment of the present invention is for constructing the upper structure of the bridge.

1 to 3, the bottom plate-girder integrated assembly module 100 according to the present invention includes a first module unit 110, a second module unit 120, a third module unit 130, A tension member 140, and a longitudinal strain member 150.

According to the present invention, the first module part (110) to the third module part (130) are assembled in units of modules according to the upper part of the upper structure of the bridge, and the upper structure of the bridge is assembled, In order to simplify the structure.

The first module unit 110 to the third module unit 130 are fabricated in module units. The width direction tension member 140 is a component that connects the first module unit 110 to the third module unit 130 located adjacent to each other in the width direction of the bridge. The longitudinal strain members 150 are formed by connecting a plurality of first module units 110, a plurality of second module units 120, or a plurality of third module units 130 arranged in a line in the longitudinal direction of the bridge Element.

3, 4 and 6 (a), the first module unit 110 has a trapezoidal cross section with one side opened and a hollow structure inside. The first module unit 110 includes a first bottom plate 111, a first bottom plate 112, a first girder 113, a first b girder 114, and a first partition plate 119. The first module unit 110 is a single assembly module constituting the upper structure of the bridge.

In the upper structure of the bridge, the first floor top plate 111 is constituted of the bottom plate of the bridge. The first bottom top plate 111 is provided with a plurality of first width direction through holes 117 into which the width direction tension members 140 are inserted. The first floor top plate 111 is provided with a plurality of first longitudinal through holes 118 through which longitudinal tension members 150 are inserted.

The first bottom floor plate 112 has a width narrower than the width of the first floor top plate 111. As shown in Fig. 3, the first bottom floor plate 112 has a structure provided with an opening communicating with the internal space. The first bottom floor plate 112 is provided with a plurality of first width direction through holes 117 and a plurality of first longitudinal direction through holes 118. It is preferable that the first width direction through holes 117 and the first longitudinal direction through holes 118 are provided in the first bottom top plate 111 and the first bottom bottom plate 112 at positions that do not overlap each other.

The first la girder 113 and the first b girder 114 vertically connect the first bottom floor plate 111 and the first floor bottom plate 112. The first 1a girder 113 is provided with a plurality of first shear keys 115 on its outer surface. As shown in FIG. 7, the first shear key 115 has a block-like structure having a trapezoidal cross section whose width is narrowed in a direction in which the first shear keys 115 are projected.

A plurality of first shear keys 115 provided on any one of the first module units 110 are engaged with recesses provided in any one of the first module unit 110 to the third module unit 130 assembled to the first module unit 110, It is possible to prevent cracks from occurring between the module parts due to the shearing force generated at the joint surfaces contacting each other.

As shown in FIG. 3, the first b-girder 114 is positioned apart from the first 1a girder 113. The first b-girder 114 is provided with a plurality of first ribs 116. The plurality of first ribs 116 are coupled to the first bottom plate 111, the first bottom plate 112 and the first b girder 114.

The plurality of first ribs 116 are spaced apart from each other along the longitudinal direction of the first module unit 110. The plurality of first ribs 116 distribute the load applied to the first bottom floor plate 111 to the first floor bottom plate 112. The plurality of first ribs 116 are provided with a plurality of first width direction through holes 117 along the height direction of the first b girder 114.

3, the inner space of the first module unit 110 is partitioned by the first partition plate 119. As shown in FIG. The first partition plate 119 is coupled to the first bottom plate 111, the first bottom plate 112, the first 1a girder 113 and the first b girder 114, The lower load is distributed to the first bottom plate 112 through the first la girder 113 and the first b girder 114. [

It is preferable that the plurality of first partition plates 119 are provided in a straight line with the plurality of first ribs 116 with respect to the first b girders 114. A plurality of first width direction through holes 117 are provided in the plurality of first partition plates 119. The first width direction through holes 117 of the plurality of first partition plates 119 are communicated with the first width direction through holes 117 provided in the plurality of first ribs 116.

In the meantime, the present invention may further include a module unit having a shape symmetrical with the first module unit 110. A plurality of concave portions are provided in place of the first shear keys 115 of the first module portion 110 in the module portion having a shape symmetrical to the first module portion 110. [

3, 4, and 6A, the second module unit 120 includes a second bottom plate 121, a second bottom plate 122, a second 2a girder 123, 124 are integrally formed. The second module unit 120 is one assembly module constituting the upper structure of the bridge. The second module part 120 has a rectangular cross section and a hollow interior.

The second floor top plate 121 is a structure constituting a bottom plate of the bridge. The second bottom top plate 121 is provided with a plurality of second width direction through holes 127 into which the width direction tension members 140 are inserted. The second floor top plate 121 is provided with a plurality of second longitudinal through holes 128 into which the longitudinal members 150 are inserted.

As shown in Fig. 3, the second bottom floor plate 122 has a structure provided with an opening communicating with the internal space. The second bottom plate (122) is provided with a plurality of second width direction through holes (127) and a plurality of second length direction through holes (128). It is preferable that the second width direction through holes 127 and the second length direction through holes 128 are provided in the second bottom top plate 121 and the second bottom bottom plate 122 at positions that do not overlap each other.

The second 2a girder 123 and the second b girder 124 vertically connect the second bottom floor plate 121 and the second floor bottom plate 122.

The second 2a girder 123 is provided with a plurality of second concave portions 125 on its outer surface. The plurality of second recesses 125 may be formed in the first module unit 110 and the second module unit 130. The second recesses 125 may be formed in the first module unit 110, to be. 7, the second recess 125 is a groove having a trapezoidal cross section whose width is narrowed in the direction in which the first shear key 115 is inserted.

The second b-girder 124 is spaced apart from the second-a-girder 123. A plurality of second shear keys 126 are provided on the outer surface of the second b girder 124. The second shear key 126 is manufactured in the same size and shape as the first shear key 115.

3, the inner space of the second module unit 120 is partitioned by the second partition plate 129, as shown in FIG. The second partition plate 129 is coupled to the second bottom top plate 121, the second bottom floor plate 122, the 2a girder 123 and the second b girder 124, And the lower load is distributed to the first bottom plate 112 via the second 2a girder 123 and the secondb girder 124. [

A plurality of second width direction through holes 127 are formed in the plurality of second partition plates 129. It is preferable that the second width direction through holes 127 of the plurality of second partition plates 129 are provided so as to communicate with the first width direction through holes 117 of the plurality of first partition plates 119.

3, 4, and 6 (c), the third bottom floor plate 131, the third bottom floor plate 132, and the third girder 133 are integrally formed. The third module unit 130 is an assembling module constituting an upper structure of the bridge, and has a trapezoidal cross section with one side opened.

The third floor top plate 131 constitutes a bottom plate of the bridge. The third bottom top plate 131 is provided with a plurality of third width direction through holes 137 into which the width direction tension members 140 are inserted. The third bottom plate 131 is provided with a plurality of third longitudinal through holes 138 through which the longitudinal tension members 150 are inserted.

The third bottom floor plate 132 is provided with a plurality of third width direction through holes 137 and a plurality of third length direction through holes 138. It is preferable that the third width direction through holes 137 and the third length direction through holes 138 are provided in the third bottom top plate 131 and the third bottom bottom plate 132 at positions that do not overlap each other.

The third girder 133 connects the third bottom floor plate 131 and the third bottom floor plate 132. The third girder 133 is a portion abutting the girders of the adjacent module units (for example, one of the first module unit 110 to the third module unit 130). As shown in Fig. 6 (c), a plurality of third concave portions 135 are provided on the outer surface of the third girder 133. Fig.

The plurality of third recesses 135 may be formed in the third recessed portion 135. The third recessed portion 135 may be formed in the recessed portion of the third module portion 130, to be. 7, the third recess 135 is a groove having a trapezoidal cross section whose width is narrowed in the direction in which the shear key (for example, the first shear key 115 or the second shear key 126) is inserted.

The third girder 133 is provided with a plurality of third ribs 134. The plurality of third ribs 134 are coupled to the third bottom plate 131, the third bottom plate 132, and the third b-girder. The plurality of third ribs 134 are spaced apart from each other along the longitudinal direction of the third module unit 130.

The plurality of third ribs 134 are configured to distribute the load applied to the third bottom floor plate 131 to the third bottom floor plate 132. The plurality of third ribs 134 are provided with a plurality of third width direction through holes 137 along the height direction of the third girder 133.

Meanwhile, the present invention may further include a module unit having a shape that is symmetrical with the third module unit 130. A plurality of shear keys are provided in place of the third concave portions 135 of the third module unit 130 in the module unit having a shape symmetrical with the third module unit 130. [

The width direction tension members 140 are installed in the first width direction through holes 117 to the third width direction through holes 137 provided in the first module part 110 to the third module part 130, Device.

The width direction tension members 140 structurally connect at least two of the first module unit 110 to the third module unit 130 arranged in parallel in the width direction of the bridge. The width direction tension members 140 are installed in a width direction sheath pipe (not shown) inserted in the first width direction through holes 117 to the third width direction through holes 137. [ The width direction tension members 140 are installed in the first module unit 110 to the third module unit 130 so that the prestressing method can be applied. After the prestressing method is applied to the width direction tension member 140, grout is injected into the width direction sheath pipe (not shown) to fix the width direction tension member 140 in the width direction sheath pipe (not shown) do.

The longitudinal straining members 150 are installed in the first longitudinal through-holes 118 to the third longitudinal through-holes 138 provided in the first module 110 to the third module 130, Device.

The longitudinal tensional members 150 may be formed of a plurality of first module portions 110 (or a plurality of second module portions 120, a plurality of third module portions 130) arranged in series in the longitudinal direction of the bridge, . The longitudinal strain members 150 are formed in a plurality of first module units 110 (or a plurality of second module units 120, a plurality of third module units 130) (Not shown) provided so as to penetrate through the hole 118. As shown in FIG. The widthwise straining members 140 are strained by applying a prestressing method. Thereafter, a grout is injected into the longitudinal sheath tube (not shown) to fix the longitudinal strain member 150 in the longitudinal sheath tube (not shown) in a strained state.

Hereinafter, a bottom plate-girder assembly module 100 according to an embodiment of the present invention will be assembled with reference to FIGS. 1, 2, and 8 to 10, and a bottom plate- A bridge construction method using an integrated assembly module will be described.

As shown in FIG. 1, the first module unit 110 to the third module unit 130 are arranged in parallel in the width direction of the bridge. At this time, the first shear key 115 of the first module unit 110 is inserted into the second recess 125 of the second module unit 120, and the first module unit 110 and the second module unit 120 Are in close contact with each other. The front end key of the second module unit 120 is inserted into the third recess 135 of the third module unit 130 so that the surface where the second module unit 120 and the third module unit 130 abut Tightly coupled.

The widthwise straining members 140 sequentially penetrate through the first width direction through holes 117 to the third width direction through holes 137 provided in the first module unit 110 to the third module unit 130, The first module unit 110 to the third module unit 130 are connected. Thereafter, by the prestressing method, the widthwise straining member 140 is strained, and the widthwise sheathing tube is injected with grout to fix the widthwise straining member 140. [ The prestress method is a method of tensioning a tension material and fixing it on a sheath pipe.

A plurality of first module units 110, a plurality of second module units 120, and a plurality of third module units 130 are arranged in series in the longitudinal direction of the bridge.

A plurality of first module parts 110 arranged in series are sequentially passed through a first longitudinal through-hole 118 provided in a plurality of first module parts 110 in which a longitudinal strain member 150 is arranged in series, Connect. Thereafter, the longitudinal torsion member 150 connecting the plurality of first module units 110 is tensed by the prestressing method, and the longitudinal torsion member is fixed by injecting grout into the longitudinal sheathing tube. This process is performed in each of the plurality of second module units 120 and the plurality of third modules, respectively.

The bridge assembled by the above process is as shown in FIG.

8 to 10 show an example in which the first module part 110 to the third module part 130 are assembled by different combinations.

8 shows an example in which the first module units 110 having a shape symmetrical to each other are arranged in parallel. 9 shows a structure in which a plurality of second module parts 120 are arranged in parallel. FIG. 10 shows an example in which a plurality of second module parts 120 are assembled by a combination of a plurality of third module parts 130. FIG.

The present invention is characterized in that a plurality of modular parts arranged in series or in parallel according to the width of the bridge and the bridge are structurally connected by the widthwise tension member 140 and the longitudinal tension member 150, By minimizing the error, structural stability can be achieved.

In addition, compared with a construction method in which a box girder is installed and a concrete is installed to form a bottom plate of a bridge, the first module unit 110 to the third module unit 130 Since the bottom plate and the girder are integrally formed, the construction time required to construct the upper structure of the bridge can be shortened.

Unlike the existing bridge construction, the present invention can be applied to a case where a plurality of module units (first module unit 110 to third module unit 130) are transferred to a construction site in a factory pre-manufactured state, Thus, it is possible to reduce a construction error occurring at the site where the upper structure of the bridge is constructed.

The present invention can construct an upper structure of a bridge by assembling a plurality of module units in units of modules without being affected by the width of the bridge and the span of the bridge.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be apparent to those of ordinary skill in the art.

100: Floor plate-girder assembly module
110: first module unit 111: first floor top plate
112: first bottom plate 113: 1st laver
114: first b-girder 115: first shear key
116: first rib 117: first width direction through hole
118: first longitudinal through-hole 119: first partition plate
120: second module section 121: second floor top plate
122: second bottom plate 123: 2a girder
124: second b-girder 125: second recess
126: second shear key 127: second width direction through hole
128: second longitudinal through-hole 129: second partition plate
130: third module part 131: third floor top plate
132: Third bottom plate 133: Third girder
134: third rib 135: third concave portion
137: third width direction through hole 138: third length direction through hole
140: widthwise tension member 150: longitudinal tension member

Claims (8)

A first bottom floor plate having a width narrower than a width of the first floor top plate; a first launder which vertically connects the first floor top plate and the first bottom floor plate and has a plurality of shear keys on the outer surface thereof; A first module unit having a trapezoidal cross section with one side open and a hollow inside, the first lower girder being connected to the first lower girder;
A second module having a second bottom plate, a second bottom plate, a second girder having a plurality of recesses on an outer surface thereof, and a second b-girder having a plurality of shear keys on the outer surface thereof;
A third bottom floor plate and a third girder connecting the third bottom floor plate and the third bottom floor plate and having a trapezoidal cross section with one side opened and a plurality of concave portions on the outer surface of the third girder, A third module unit provided; And
A longitudinal torsion member longitudinally connecting the first module unit and the third module unit in a lengthwise direction of the first module unit to the third module unit in units of modules having the same structure;
And a width direction tension member connecting at least two of the first module unit and the third module unit in a width direction of the first module unit to the third module unit,
Wherein the first module part and the third module part are coupled to each other by a plurality of concave parts provided on a surface in contact with each other and the plurality of shear keys, Integrated module for bottom plate and girder. The method according to claim 1,
Wherein the shear key has a block-like structure having a trapezoidal cross section whose width is narrowed in a protruding direction,
Wherein the concave portion is a groove having a trapezoidal cross section whose width is narrowed in a direction in which the shear key is inserted. The method according to claim 1,
Wherein the first module part to the third module part are provided with a plurality of width direction through holes into which the width direction tension members are inserted. The method according to claim 1,
Wherein the first module part to the third module part are provided with a plurality of longitudinal through holes into which the longitudinal strain members are inserted. The apparatus of claim 1, wherein the first module unit comprises:
A plurality of first ribs connecting the first bottom floor plate and the first bottom floor plate are installed on the first b-girder,
Wherein the plurality of width direction tension members are installed in the first module part through the plurality of first ribs. The apparatus of claim 1, wherein the third module unit comprises:
The third girder is provided with a plurality of third ribs connecting the third bottom floor plate and the third bottom floor plate,
Wherein the plurality of width direction tension members are installed in the third module part through the plurality of third ribs. (A) manufacturing a first module part, a second module part and a third module part of the bottom plate-girder integrated assembly module of claim 1;
(B) at least two of the first module portion and the third module portion are arranged in parallel, and at least two of the first module portion and the third module portion are inserted into the concave portion, Abutting;
(C) a longitudinal strain member is inserted and tensioned in at least two of the first module portion and the third module portion; And
(D) a step in which at least two of the first module part and the third module part are inserted in the width direction to be strained in the width direction tension member, and a bridge construction method using the assembly module with a bottom plate- . 8. The method of claim 7,
Wherein at least two of the first module part and the third module part assembled in step B are arranged in series.

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