KR102210300B1 - Groove type stiffener injection device - Google Patents

Abstract

Disclosed is a grooved-type reinforcement injection device. The disclosed grooving type reinforcement injection device includes; A steel pipe inserted into a perforated hole in the ground and having a spray hole formed for each of a plurality of chamber sections, and a plurality of injections that are respectively extended and installed from the inside of the steel pipe according to each chamber section, and a reinforcement is injected to fill the hole through the spray hole. It characterized in that it comprises a; is provided in the tube and the injection tube, a packer portion for sealing the inlet of the steel pipe by pressing the outer circumferential surface of the steel pipe or partitioning each chamber section inside the steel pipe.

Description

Grooving type reinforcement injection device {GROOVE TYPE STIFFENER INJECTION DEVICE}

The present invention relates to a grooving-type reinforcing material injection device, and more particularly, a packer member provided between a stopper member in a steel pipe is arranged individually or in pairs for each section, and a steel pipe at a position corresponding to the outer surface of the packer member As the groove is formed by pressing the button, the inner circumferential surface of the steel pipe protrudes inward and is in close contact with the circumferential surface of the packer member, so that the inside of the steel pipe can be sealed and partitioned for each section without the longitudinal operation of the stopper member, thereby securing a partition space for reinforcing material input. It is advantageous to the grooving type reinforcing material injection device that can significantly improve workability.

In general, in order to improve and reinforce the ground of the tunnel excavation surface, soft ground, or incision, a reinforcing material injection device is used that perforates the ground or rock and injects a reinforcing material (also called grout) including cement into the perforated space.

In particular, a steel pipe is inserted by drilling at regular intervals along the circumferential surface of the tunnel, and a reinforcement is injected to order or reinforce the ground, and cracks and cavities generated in the rock mass during tunnel excavation are detected to form a drilled hole of a certain diameter, and this drilling Reinforcement is also injected into the hole.

When the existing reinforcing material injection device is installed in the perforated hole, it is divided into multi-stage sections through a plurality of expansion sheets and is configured to inject the reinforcing material into each section. Therefore, in the case of using a quick-setting material configured to quickly harden as a reinforcement, the perforated hole Try to solve the problem of not being able to recharge.

In this way, conventionally, in order to spray the reinforcing material for each section using a reinforcing material injection device, an elastic member is installed inside the steel pipe, and it expands to the outside using the compression members provided on both sides of the elastic member (or packer). By being in close contact, the enclosed space is partitioned for each section.

However, in the conventional reinforcing material injection device, in order to expand the elastic member to the outside, the central connector is moved in the longitudinal direction using a nut, and thus, the elastic member is pressed by pressing both sides of the elastic member through the crimping member connected integrally. It expands outward and adheres to the inner circumferential surface of the steel pipe to maintain airtightness, but the overall expansion and contraction member's expansion and operation structure is very complex, and if the screw thread connected to the nut is damaged, the expansion and contraction member does not expand, resulting in an operation error. It has a problem that occurs.

Therefore, there is a need to improve this.

As a related background technology, there is Korean Patent Publication No. 10-0605562 (2006.07.20, title of invention: multi-grouting injection device).

The present invention was created by the above necessity, and a packer member provided between the stopper members inside the steel pipe is arranged individually or in pairs for each section, and the groove is formed by pressing the steel pipe at a position corresponding to the outer surface of the packer member. As it is formed, the inner circumferential surface of the steel pipe protrudes inward and closes to the circumferential surface of the packer member so that the inside of the steel pipe can be sealed and partitioned for each section without the longitudinal operation of the stopper member, which is advantageous in securing a partition space for reinforcing material input. It is an object of the present invention to provide a grooved-type reinforcement injection device capable of remarkably improving performance.

In order to achieve the above object, the grooving-type reinforcing material injection device according to the present invention includes a steel pipe inserted into a perforation hole of a ground and having a spray hole formed for each of a plurality of chamber sections; A plurality of injection pipes each extending along each chamber section in the steel pipe and filling the hole through the injection hole by injecting a reinforcing material; And a packer part provided in the injection pipe and sealing an inlet of the steel pipe by pressing the outer circumferential surface of the steel pipe or partitioning each chamber section within the steel pipe.

An end cap protruding toward the bottom of the perforated hole is provided at an end of the steel pipe, and an inlet bracket for blocking is provided at an entrance of the steel pipe.

The chamber section includes a first chamber section, a second chamber section, a second chamber section, and a third chamber section, and the injection pipe includes: a first injection pipe extending from the inside of the steel pipe to the first chamber section; A second injection pipe extending from the inside of the steel pipe to a second chamber section; A third injection pipe extending from the inside of the steel pipe to a third chamber section; And a fourth injection pipe extending from the inside of the steel pipe to the fourth chamber section.

The packer portion may include a pair of stopper members having a plurality of through holes through which the injection pipe is installed; A packer member corresponding to the through hole of the stopper member, having an insertion hole in which the injection pipe is installed, and provided between the pair of stopper members; And a grooving portion for partitioning the chamber sections by pressing and fixing the outer peripheral surface of the steel pipe with a grooving mechanism so that the circumferential surface of the packer member and the inner surface of the steel pipe are sealed.

The stopper member is further provided with a reinforcing support pipe extending a set length so as to be inserted into and fixed to an outer peripheral surface of the injection pipe inserted into at least one of the through holes.

The grooving part protrudes an arc-shaped curved protrusion from the inner circumferential surface of the steel pipe by turning the grooving mechanism in a roller manner using a grooving mechanism disposed around the steel pipe or pressing the steel pipe while rotating the packer member. It is characterized in that it is tightly sealed to the circumferential surface of.

When two packer parts are provided, they are spaced apart to have an accommodation space part, and the expansion material is injected and discharged to the outside through the discharge hole of the steel pipe to expand and thus contact the inside of the perforation hole to separate each section. It characterized in that it comprises an expansion part.

A connection support tube is further provided that is inserted into the outer circumferential surface of the injection tube inserted into at least one of the through holes in each of the stopper members disposed to face each other in the receiving space part, and connects and restrains the stopper members respectively. To do.

The separation and expansion part may include an expansion material supply pipe connected through the packer part through the inside of the steel pipe; A discharge hole formed in the expandable material supply pipe to discharge the expandable material into the receiving space; An expansion member for receiving the expansion material discharged through the discharge hole through the discharge hole and in close contact with the inner surface of the hole to separate each section into which a reinforcing material is injected or to support the steel pipe inside the hole; And a band member fixing the expansion member to the outer circumferential surface of the steel pipe.

The discharge hole is formed by being cut at an end of the expansion material supply pipe disposed in the last receiving space, and the receiving space part excluding the last is formed as a hole through the side of the expansion material supply pipe.

The outer surface of the steel pipe is characterized in that further provided with a spacer member to prevent damage to the separation and expansion portion when entering the perforated hole of the steel pipe at the entry portion where the separation and expansion portion is installed.

The injection hole is characterized in that it is provided with a check member for preventing the reinforcing material sprayed outward from flowing backward and flowing into the inside of the steel pipe.

In the grooving type reinforcement injection device according to the present invention, the packer member provided between the stopper members in the steel pipe is arranged individually or in pairs for each section, and a groove is formed by pressing the steel pipe at a position corresponding to the outer surface of the packer member. As a result, the inner circumferential surface of the steel pipe protrudes inward and closes to the circumferential surface of the packer member so that the inside of the steel pipe can be sealed and partitioned for each section without the longitudinal operation of the stopper member, which is advantageous in securing a partition space for reinforcing material input and workability. Can be significantly improved.

In addition, in the present invention, by forming a reinforcing support pipe and a connection support pipe from one side of the stopper member to the outside of the through hole, and installing and fixing it on the outer circumferential surface of the injection pipe, the load is stably supported even when an eccentric load is applied to the stopper member or the packer member. can do.

1 is an overall configuration diagram of a grooved-type reinforcement injection device according to an embodiment of the present invention.
2 is a partial cross-sectional view of a state in which a grooved-type reinforcement injection device according to an embodiment of the present invention is installed in a hole in the ground.
3 is a partial cross-sectional view showing an enlarged portion of the grooved-type reinforcement injection device according to an embodiment of the present invention installed in a hole in the ground.
FIG. 4 is an exploded perspective view of part “A” in FIG. 3.
5 is an exploded perspective view of a part "B" in FIG. 3.
6 is an exploded perspective view of a portion "C" in FIG. 3.
7 is an exploded perspective view of a portion "D" in FIG. 3.
8 is an enlarged cross-sectional view of portion "A" in FIG. 3.
9 is an enlarged cross-sectional view of a portion "B" in FIG. 3.
10 is an enlarged cross-sectional view of a portion "C" in FIG. 3.
11 is an enlarged cross-sectional view of a portion "D" in FIG. 3.

Hereinafter, a grooved-type reinforcement injection device according to an embodiment of the present invention will be described with reference to the accompanying drawings.

In this process, the thickness of the lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described later are terms defined in consideration of functions in the present invention and may vary according to the intention or custom of users or operators. Therefore, definitions of these terms should be made based on the contents throughout the present specification.

1 is an overall configuration diagram of a grooving-type reinforcement injection device according to an embodiment of the present invention, and FIG. 2 is a state portion in which a grooved-type reinforcement injection device according to an embodiment of the present invention is installed in a perforation hole of the ground 3 is a partial cross-sectional view of a state in which a grooved-type reinforcing material injection device according to an embodiment of the present invention is installed in a hole in the ground, showing an enlarged portion, and FIG. 4 is "A" in FIG. It is an exploded perspective view.

FIG. 5 is an exploded perspective view of part "B" in FIG. 3, FIG. 6 is an exploded perspective view of part "C" in FIG. 3, FIG. 7 is an exploded perspective view of part "D" in FIG. 3, and FIG. An enlarged cross-sectional view of a portion, FIG. 9 is an enlarged cross-sectional view of a portion "B" in FIG. 3, an enlarged cross-sectional view of a portion "C" in FIG. 3, and FIG. 11 is an enlarged cross-sectional view of a portion "D" in FIG.

1 to 11, a grooved-type reinforcement injection device according to an embodiment of the present invention includes a steel pipe 100, an injection pipe 200, and a packer part 300.

The steel pipe 100 is inserted into the perforation hole 10 of the ground, and a spray hole 110 is formed for each of the plurality of chamber sections 20.

The injection holes 100 are formed to penetrate from the inside to the outside of the steel pipe 100, and are shown to be formed in six at equal intervals. If the number of injection holes 110 is formed in an even number, the number is not limited.

The end of the steel pipe 100 is provided with an end cap 120 protruding toward the bottom of the perforated hole 10.

The end cap 120 is preferably formed in a conical shape protruding above the center.

A blocking inlet bracket 130 is provided at the entrance of the steel pipe 100.

The inlet bracket 130 is formed to correspond to the inlet portion of the steel pipe 100

The injection pipes 200 are installed extending along each chamber section 20 within the steel pipe 100, and a plurality of injection pipes 200 are provided to inject a reinforcing material and fill the perforated holes 10 through the injection holes 110.

The chamber section 20 includes a first chamber section 22, a second chamber section 24, a third chamber section 26, and a fourth chamber section 28.

The injection pipe 200 includes a first injection pipe 210 extending from the inside of the steel pipe 100 to the first chamber section 22, and the first injection pipe 210 extending from the inside of the steel pipe 100 to the second chamber section 24. The second injection pipe 220, the third injection pipe 230 extending from the inside of the steel pipe 100 to the third chamber section 26, and the fourth chamber section 28 extending from the inside of the steel pipe 100 It includes a fourth injection pipe 240 to be formed.

The first injection pipe 210 is formed to extend only to the first chamber section 22, thereby injecting a reinforcing material into the first chamber section 22 and discharging it into the drilling hole 10 through the first injection hole 110 to be drilled. It is filled in the space inside the corresponding location of the hole 10 to reinforce the ground.

The second injection pipe 220 is formed to extend only to the second chamber section 24, thereby injecting a reinforcing material into the second chamber section 24 and discharging the reinforcing material into the drilling hole 10 through the second injection hole 110 to be drilled. It is filled in the space inside the corresponding location of the hole 10 to reinforce the ground.

The third injection pipe 230 is formed extending only to the third chamber section 26, so that a reinforcing material is injected into the third chamber section 26 and discharged through the third injection hole 110 into the drilling hole 10 to be drilled. It is filled in the space inside the corresponding location of the hole 10 to reinforce the ground.

In addition, the fourth injection pipe 240 is formed to extend only to the fourth chamber section 28, so that a reinforcement is injected into the fourth chamber section 28 and discharged into the perforated hole 10 through the fourth injection hole 110. To reinforce the ground by filling the space inside the perforated hole 10 at the corresponding location.

The packer part 300 is provided in the injection pipe 200 and seals the inlet of the steel pipe 100 by pressurizing the outer circumferential surface of the steel pipe 100 or partitioning each chamber section 20 within the steel pipe 100. Configuration.

The packer part 300 corresponds to a pair of stopper members 310 in which a plurality of through holes 312 in which the injection pipe 200 is installed, and a through hole 312 of the stopper member 310, The insertion hole 322 in which the injection pipe 200 is installed is formed, and the packer member 320 provided between the pair of stopper members 310 and the circumferential surface of the packer member 320 and the steel pipe 100 are It includes a grooving portion 330 for partitioning each chamber section 20 by pressing and fixing the outer circumferential surface of the steel pipe 100 with a grooving mechanism 30 so that the inner surface is sealed.

The stopper member 310 is formed in a circular plate.

It is preferable that the outer diameter of the stopper member 310 is slightly smaller than the inner diameter of the steel pipe 100 within a set allowable range.

The packer member 320 is made of a material having rich elasticity, such as a rubber material or a stretchable synthetic resin material, and is sealed tightly and firmly by forming a grooving portion 33 using a grooving mechanism 30 to be described later.

The stopper member 310 may further include a reinforcing support pipe 340 extending a set length so as to be inserted into and fixed to the outer circumferential surface of the injection pipe 200 inserted into at least one of the through holes 312.

Since the reinforcing support pipe 340 has an inner diameter corresponding to the outer diameter of the injection pipe 200, even if an eccentric load is applied to the stopper member 310 through the packer member 320, a stable support force is provided through the reinforcing support pipe 340. It is possible to secure.

4 and 8, when one packer member 320 is provided, the reinforcing support pipe 340 is formed to extend to both sides of the stopper members 310 respectively provided on both sides of the packer member 320 do.

Referring to FIGS. 5 to 7 and 9 to 11, when two packer members 320 are provided in duplicate, the reinforcing support pipes 340 provided on the outermost sides of each of the stopper members ( 310) are provided respectively.

It is characterized in that the end of the reinforcing support pipe 340 and the outer circumferential surface of the injection pipe 200 are integrally fixed by one or two or more welding portions.

The grooving part 330 uses a grooving mechanism 30 disposed around the steel pipe 100 to rotate the grooving mechanism 30 in a roller manner or rotate the steel pipe 100 to pressurize the steel pipe 100. It is characterized in that it is closely sealed to the circumferential surface of the packer member 320 by protruding the arc-shaped curved protrusion 332 on the inner circumferential surface.

The grooving part 330 is characterized in that it is formed in a U-shaped groove on the outer surface of the steel pipe 100.

The grooving portion 330 may be formed through one or two or more grooves through the grooving mechanism 30.

The curved protrusion 332 may be formed to be curved in an arc shape.

Each of the stopper members 310 arranged to face each other in the receiving space 40 is inserted into the outer circumferential surface of the injection pipe 200 inserted into at least one of the through holes 312 to connect the stopper members 310 respectively A connection support pipe 350 to restrain may be further provided.

Since the connection support pipe 350 has an inner diameter corresponding to the outer diameter of the injection pipe 200, even if an eccentric load is applied to the stopper member 310, the connection support pipe 350 supported by the outer diameter of the injection pipe 200 It is possible to secure a stable support.

In addition, the connection support pipe 350 restrains each of the stopper members 310 facing each other, so that the packer member 320 is formed by a reinforcing material injected into the chamber section 20 or an expansion material injected into the accommodation space 40. It can prevent movement in the length direction of (100).

When two packer parts 300 are provided, they are spaced apart to have the receiving space part 40, and the expansion material is injected and discharged to the outside through the discharge hole 450 of the steel pipe 100 to expand, so It includes a separation and expansion unit 400 that is in contact with the inside of the hole 10 to separate each section.

Separation and expansion part 400 is formed in the expansion material supply pipe 410 and the expansion material supply pipe 410 connected to pass through the packer part 300 through the inside of the steel pipe 100 and expands in the receiving space part 40 Separate each section into which the reinforcing material is injected by receiving the discharge hole 420 for discharging the material and the expansion material discharged to the discharge hole 450 through the discharge hole 420 and in close contact with the inner surface of the drilling hole 10 Or an expansion member 430 that supports the steel pipe 100 on the inside of the perforated hole 10 and a band member 440 that fixes the expansion member 430 to the outer circumferential surface of the steel pipe 100.

The expansion member 430 includes an expansion sheet having flexible ductility and not easily torn.

The discharge hole 420 is formed by being cut at the end of the expansion material supply pipe 410 disposed in the last receiving space part 40, and penetrates to the side of the expansion material supply pipe 410 in the receiving space part 40 except the last It is characterized in that it is formed as a hole.

On the outer surface of the steel pipe 100, a spacer member 500 that prevents damage to the separation and expansion unit 400 when the steel pipe 100 enters the perforated hole 10 at the entrance portion where the separation and expansion unit 400 is installed is further provided. I can.

The spacer member 500 has both ends fixed to the outer circumferential surface of the steel pipe 100 by welding, etc., and is formed to be convex in an arc shape from both ends toward the center, so that the soil or the like is in direct contact with the separated expansion unit 400 before expansion and is damaged. Prevent it.

The injection hole 110 may be provided with a check member 600 that prevents the reinforcing material sprayed outward from flowing backward and flowing into the steel pipe 100.

The check member 600 is provided on the inner circumferential surface of the injection hole 110 and provided at the inner circumferential surface of the body portion 610 and the body portion 610 extending from the inside to the outside, and mounted on the inner circumferential surface of the steel pipe 100 It includes an inner engaging portion 620, which is provided at the outer end of the body portion 610, and an outer engaging portion 630 that is mounted to the outer peripheral surface of the steel pipe 100.
The inner engaging portion 620 and the outer engaging portion 630 are coupled to the steel pipe 100 in a state that firmly holds the body portion 610 at the inner edge and the outer edge of the spray hole 110, and thus the check member 600 ) Can be prevented from being separated from the steel pipe 100 by colliding with the inner surface of the perforated hole 10 during operation.
Since the inner engaging portion 620 and the outer engaging portion 630 are formed to be bent so that the step difference is lowered from the center to the outer edge of the radius, the edges of the inner engaging portion 620 and the outer engaging portion 630 collide with the object to be contacted. Try to avoid tipping.

Therefore, in the grooved-type reinforcement injection device according to an embodiment of the present invention, the packer member provided between the stopper members inside the steel pipe is arranged individually or in pairs for each section, but at a position corresponding to the outer surface of the packer member As the grooves are formed by pressing, the inner circumferential surface of the steel pipe protrudes inward and is in close contact with the circumferential surface of the packer member so that the inside of the steel pipe can be sealed and partitioned for each section without the longitudinal operation of the stopper member, thereby securing a partition space for reinforcing material input. It is advantageous for, and workability can be remarkably improved. In addition, in the present invention, by forming a reinforcing support pipe and a connection support pipe from one side of the stopper member to the outside of the through hole, and installing and fixing it on the outer circumferential surface of the injection pipe, the load is stably supported even when an eccentric load is applied to the stopper member or the packer member. can do.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is only illustrative, and those of ordinary skill in the field to which the technology pertains, various modifications and other equivalent embodiments are possible. I will understand.

Therefore, the true technical protection scope of the present invention should be determined by the following claims.

10: drilling hole 20: chamber section
22: first chamber section 24: second chamber section
26: 3rd chamber section 28: 4th chamber section
100: steel pipe 110: spray hole
120: end cap 130: inlet bracket
200: injection pipe 210: first injection pipe
220: 2nd injection pipe 230: 3rd injection pipe
240: 4th injection pipe 300: packer part
310: stopper member 312: through hole
320: packer member 322: insertion hole
330: grooving part 332: curved protrusion
340: reinforcement support pipe 350: connection support pipe
400: separation and expansion unit 410: expansion material supply pipe
420: discharge hole 430: expansion member
440: band member 450: discharge hole
500: spacer member 600: check member
610: body portion 620: inner engaging portion
630: outer locking part

Claims (12)

A steel pipe inserted into the perforation hole of the ground and having a spray hole formed for each of a plurality of chamber sections;
A plurality of injection pipes each extending along each chamber section in the steel pipe and filling the hole through the injection hole by injecting a reinforcing material; And
Includes; a packer part provided in the injection pipe and sealing the inlet of the steel pipe by pressing the outer circumferential surface of the steel pipe in close contact or partitioning each chamber section within the steel pipe,
When two packer parts are provided, they are spaced apart to have an accommodation space part, and the expansion material is injected and discharged to the outside through the discharge hole of the steel pipe to expand and thus contact the inside of the perforation hole to separate each section. It includes an expansion part,
A spacer member is further provided on the outer surface of the steel pipe to prevent damage to the separated and expanded part when entering the perforated hole of the steel pipe at the entry part where the separated and expanded part is installed,
The spacer member is fixed at both ends by welding to the outer circumferential surface of the steel pipe, and is formed to be convex in an arc shape toward the center from both ends to prevent the soil from being damaged by direct contact with the separated and expanded parts before expansion,
The injection hole is provided with a check member that prevents the reinforcing material sprayed outward from flowing backward and flowing into the steel pipe,
The check member,
A body part extending from the inside to the outside on the inner circumferential surface of the injection hole;
An inner engaging portion provided at an inner end portion of the body portion and mounted on an inner peripheral surface of the steel pipe; And
An outer locking part provided at an outer end of the body part and mounted on the outer circumferential surface of the steel pipe;
Grooving type reinforcement injection device comprising a.
The method of claim 1,
The end of the steel pipe is provided with an end cap protruding toward the bottom of the perforated hole,
A grooving type reinforcement injection device, characterized in that a blocking inlet bracket is provided at the entrance of the steel pipe.
The method of claim 1,
The chamber section includes a first chamber section, a second chamber section, a second chamber section, and a third chamber section,
The injection tube,
A first injection pipe extending from the inside of the steel pipe to a first chamber section;
A second injection pipe extending from the inside of the steel pipe to a second chamber section;
A third injection pipe extending from the inside of the steel pipe to a third chamber section; And
And a fourth injection pipe extending from the inside of the steel pipe to the fourth chamber section.
The method of claim 1,
The packer part,
A pair of stopper members having a plurality of through holes in which the injection pipe is installed;
A packer member corresponding to the through hole of the stopper member, having an insertion hole in which the injection pipe is installed, and provided between the pair of stopper members; And
A grooving part for partitioning the chamber sections by pressing and fixing the outer circumferential surface of the steel pipe with a grooving mechanism so that the circumferential surface of the packer member and the inner surface of the steel pipe are sealed;
Grooving type reinforcement injection device comprising a.
The method of claim 4,
The stopper member is further provided with a reinforcing support pipe extending a set length so as to be inserted and fixed to an outer peripheral surface of the injection pipe inserted into at least one of the through holes.
The method of claim 4,
The grooving part protrudes an arc-shaped curved protrusion from the inner circumferential surface of the steel pipe by turning the grooving mechanism in a roller manner using a grooving mechanism disposed around the steel pipe or pressing the steel pipe while rotating the packer member. Grooving type reinforcement injection device, characterized in that tightly sealed to the circumferential surface of the.
delete The method of claim 4,
A connection support tube is further provided that is inserted into the outer circumferential surface of the injection tube inserted into at least one of the through holes in each of the stopper members disposed to face each other in the receiving space part, and connects and restrains the stopper members respectively. Grooving type reinforcement injection device.
The method of claim 1,
The separation and expansion part,
An expanding material supply pipe connected through the packer portion through the inside of the steel pipe;
A discharge hole formed in the expandable material supply pipe to discharge the expandable material into the receiving space;
An expansion member for receiving the expansion material discharged through the discharge hole through the discharge hole and in close contact with the inner surface of the hole to separate each section into which a reinforcing material is injected or to support the steel pipe inside the hole; And
And a band member fixing the expansion member to the outer circumferential surface of the steel pipe.
The method of claim 9,
The discharge hole is formed by being cut at the end of the expansion material supply pipe disposed in the last receiving space, and the receiving space part excluding the last is formed as a hole through the side of the expansion material supply pipe. Ice type reinforcement injection device.
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