KR101869387B1

KR101869387B1 - Simplified concrete filling method for steel tube using the same

Info

Publication number: KR101869387B1
Application number: KR1020170106456A
Authority: KR
Inventors: 박순전; 석원균; 최윤진; 김광기; 김영선; 조홍범
Original assignee: 롯데건설 주식회사
Priority date: 2017-08-23
Filing date: 2017-08-23
Publication date: 2018-06-20

Abstract

The present invention relates to a method of manufacturing a concrete filled steel pipe member to be applied to a backfilling method, and more particularly, to a method for manufacturing a concrete filled steel pipe member which is improved to fill a concrete in the steel pipe without lifting a trimming pipe after inserting a trimming pipe into the steel pipe. And to a method for simplifying the filling of concrete in a steel pipe using the same.
In the present invention, a funnel portion is formed at an upper end, a pipe portion is coupled to a lower portion of the funnel portion, and a distal end of the pipe portion is opened to form a discharge port. Provides a tail pipe for filling steel pipes separated by a height of 2m.
Further, the present invention provides a method of manufacturing a steel pipe, comprising the steps of: (a) inserting the steel pipe-filling trunk pipe vertically into a steel pipe installed in the ground; (b) pouring concrete into the funnel portion so that the concrete is discharged from the discharge port and raised from the lower portion of the steel pipe; (c) continuously pouring concrete into the funnel while maintaining the trem canal, thereby causing the concrete poured into the pipe portion to be discharged through the n-th casting hole while the discharge port is blocked by the pressure of the poured concrete And (d) continuously pouring concrete into the funnel while maintaining the trap pipe, whereby the n-th casting port is blocked by the pressure of the poured concrete, and the concrete put into the pipe is pushed into the n- The method comprising the steps of: (a) continuously discharging the concrete through the pipe; and (b) continuing the process until the first casting hole is closed.

Description

{Simplified concrete filling method for steel tube using the same method}

The present invention relates to a method of manufacturing a concrete filled steel pipe member to be applied to a backfilling method, and more particularly, to a method for manufacturing a concrete filled steel pipe member which is improved to fill a concrete in the steel pipe without lifting a trimming pipe after inserting a trimming pipe into the steel pipe. And to a method for simplifying the filling of concrete in a steel pipe using the same.

The top-down method is to construct the pile foundation by using the H beam (steel frame) with pile construction before the trenching, It is the construction method to carry out both ground and underground construction at the same time.

In the conventional method, since the H-beam column members of the underground H-beam are installed before the completion of the underground construction (completion of the underground structural member), the H beam has been excessively applied. However, recently, a concrete filled steel tube (CFT) method has been applied to reduce the amount of H beam iron by replacing H beams by charging concrete into steel tubes.

On the other hand, in principle, concrete can not be laid because it drops more than 1m. This is because the concrete is freely falling and material separation occurs. Therefore, when applying the CFT method, it is necessary to use the trestle pipe to fill the concrete pipe with concrete.

The funnel tube is formed with a funnel portion at an upper end thereof, and a pipe portion is coupled to the funnel portion. Since the concrete injected through the funnel moves downward while rotating in the pipe portion, the air pressure inside the pipe portion is minimized and discharged to the discharge port of the pipe portion. However, as the concrete is discharged, the lower portion of the pipe portion is discharged to the concrete And when it is buried more than about 2 m, pressure is applied to the inside of the pipe section to be closed. Therefore, conventionally, in order to solve such a problem, it has been inevitable to pour the concrete while sequentially raising and cutting the trestle pipe in the vertical direction.

As shown in Fig. 1, heavy equipment such as a service crane and a pump car should be used for the tremie tube elevation work. Therefore, the steel pipe filling work using the trestle tube is economically disadvantageous, takes a long time to work, and as the file construction progresses, the space for moving the equipment is also limited, which leads to a lot of inconvenience.

In addition, with the inconvenience and inconvenience of the above-mentioned tray pipe work, it is convenient to perceive that the size of the steel pipe to be filled with the concrete is small and the concrete can be poured without inserting the tail pipe, so that the concrete pipe is poured directly onto the steel pipe Often put. As a result, separation of the material of the charged concrete occurs, resulting in a problem of poor construction in which the steel pipe filled with concrete fails to secure sufficient rigidity and durability as a column member.

1. Patent No. 10-1632701 "Circular pre-assembled column structure and method of back-boring method and frame construction using the same", 2016. 06. 22. Announcement 2. Registration No. 10-1298476, "Steel Concrete Column ", 2013. 08. 21. Announcement

1. Kwon, KS, "Development and Construction of ACT Column Technology for Welded and Assembled CFT Structures", Building and Construction Technology Society Volume 22, No. 4 (July / August 2015) pp.18-24

An object of the present invention is to provide a method for installing a concrete truck in a funnel at the upper end of a concrete pipe without elevating the concrete pipe in the process of filling concrete by inserting a concrete pipe into a steel pipe.

In order to solve the above-described problems, the present invention provides a funnel portion formed at an upper end thereof, and a pipe portion is coupled to a lower portion of the funnel portion, wherein a distal end of the pipe portion is opened to form a discharge port, Provides a trailer tube for charging steel pipes with car pit spacing separated by 1.5 ~ 2m height.

The pouring holes may be alternately opened toward the opposite direction, and the pouring holes may be provided with a reinforcing material for the concrete discharge pressure.

Further, the present invention provides a method of manufacturing a steel pipe, comprising the steps of: (a) inserting the steel tube filling trickle tube vertically into a steel pipe installed in the ground; (b) pouring concrete into the funnel portion so that the concrete is discharged from the discharge port and raised from the lower portion of the steel pipe; (c) continuously pouring concrete into the funnel while maintaining the trem canal, thereby causing the concrete poured into the pipe portion to be discharged through the n-th casting hole while the discharge port is blocked by the pressure of the poured concrete ; (d) The concrete is continuously poured into the funnel while maintaining the trem canal, so that the n-th casting port is blocked by the pressure of the poured concrete, and the concrete put into the pipe is pushed into the n-1th casting pit (C) continuing the process of discharging the concrete through the pipe until the first casting hole is closed; and (e) drawing the trimming pipe and curing the concrete filled in the pipe to complete the concrete filled steel pipe. wherein the filling height of the concrete in the pipe section is maintained at an equivalent level in the step (b) to the step (d).

According to the present invention, a trimming pipe for filling a steel pipe and a concrete filling simplifying method in a steel pipe using the same provide the following effects.

1. It is possible to complete the concrete filling work in the steel pipe in the condition that the tremy pipe is inserted into the steel pipe, so it is not necessary to use the heavy equipment such as the crane and the pump car, And the construction cost is reduced.

2. Because the concrete can be poured into the funnel part of the tremy pipe by putting the remicon truck suit, there is no inconvenience to use the tremie pipe. Therefore, it is possible to fill the closed steel pipe without material separation according to the use of the tremie pipe, .

3. It is possible to fill the inside of the steel pipe by alternately arranging the casting holes of the trimming pipe portion in the opposite direction so that the casting holes are reinforced with respect to the concrete discharge pressure by attaching a reinforcing material to the casting holes can do.

FIG. 1 is a photograph of a work process of lifting a tail pipe to fill concrete in a steel pipe.
FIG. 2 illustrates an embodiment of a steel pipe for filling a steel pipe provided by the present invention.
[Fig. 3] shows an embodiment in which a stiffener is provided in a putting hole.
FIG. 4 is a view showing steps of a concrete filling simplification method in a steel pipe provided by the present invention.

The present invention relates to a trimming pipe for filling concrete in a steel pipe using a falling motion of concrete, a fluid movement principle based on gravity regulation, and a method for simplifying filling of concrete in a steel pipe using the same. So that the entire steel pipe can be laid without elevating the tail pipe.

Conventionally, when concrete is poured into a steel pipe using a trestle pipe, the lower end portion of the trestemtube pipe portion is buried in concrete, so that the pipe portion is entirely closed. Therefore, a heavy equipment such as a crane is used to raise the trestemtube, I could not help it.

Also in the present invention, the concrete poured at the beginning is discharged through the discharge port at the end of the pipe. However, according to the present invention, since the pressure generated in the pipe portion can be discharged to the outside by forming a piercing hole on the side surface of the trummy pipe portion, concrete having a height equal to or higher than a certain height is charged, And the concrete is discharged through the piercing hole.

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

FIG. 2 shows an embodiment of a tube pipe 10 for filling a steel pipe provided by the present invention, in which a funnel portion 12 is formed at an upper end thereof, and a pipe portion 1 to n-th striking holes 14 are formed on the side surface of the pipe portion 11 at a distance of 1.5 to 1.5 mm from the top to the bottom, It is separated by a height of 2m.

The funnel portion 12 is configured to be pushed from the bottom to the top for concrete pouring work, especially for pouring concrete with a concrete car chute. When the trestle tube is inserted into a steel pipe, the above- .

The pipe section 11 can be varied in length as required. The upper end of the pipe section 11 communicates with the funnel section 12 and the lower end of the pipe section 11 opens to form a discharge port 13. Particularly, on the side surface of the pipe portion 11, the 1 st to n th car insertion holes 14 are spaced apart by 1.5 to 2 m in height from the top to the bottom.

There is no restriction on the size and shape of the installation tool 14. However, considering the stiffness of the trummy tube, the flow path of the concrete, the discharge amount, discharge pressure, etc., It is preferable to form it into a long elongated hole.

Since the unconfined concrete flows in a smaller resistance as a fluid, the concrete moves in the gravity direction even if a piercing hole is formed in the side surface of the pipe portion. The concrete is discharged to the discharge port 13 at the end of the pipe end, The n-th slot is blocked by the n-th slot, and the discharge passage is changed to the n-th slot.

If the pipe section 11 of the trestle tube is buried in the concrete more than 2 m from the end, the pressure is applied to the inside of the pipe section 11, so that if there is a height difference of more than 2 m between the putting holes 14, Since the process of discharging to outside the aesthetic pipe part (i.e., inside the steel pipe) is discontinuous, the height difference of the striking hole 14 should be within 2 m. However, if the number of the striking tool 14 is excessively large, the durability of the striking tube may be deteriorated, and the cost for forming the striking hole may be excessively increased, so that the height difference of the striking hole is less than 1.5 m. Accordingly, in the present invention, the first to nth-stage inserted holes are spaced apart from each other by a height difference of 1.5 to 2 m.

Further, it is preferable that the pouring tools 14 are sequentially opened alternately in opposite directions. If the pouring tools 14 are all opened in the same direction, the discharge of the concrete is performed only on one side, which may adversely affect the uniform filling of the concrete in the steel pipe.

In addition, the concrete can be discharged laterally to break the piercing hole 14, so that the reinforcing steel reinforcement 15, 16 can be coupled to the concrete pouring pressure in the piercing hole. The reinforcing steel reinforcement may be variously applied depending on the thickness of the trimming pipe portion and the size of the piercing hole.

Specifically, as shown in FIG. 3, when the thickness of the pipe portion is 4 mm, steel reinforcing materials having a diameter of 19 mm or more can be welded longitudinally on both sides and a central portion thereof. When the thickness of the pipe portion is 8 mm or more, reinforcement of the center of the piercing hole may be omitted.

(A) inserting the above-mentioned tube pipe for filling steel pipe (10) vertically into a steel pipe (20) installed in the ground; (b) pouring the concrete (30) into the funnel part (12) so that the concrete (30) is discharged from the discharge port (13) so as to rise from the lower part of the steel pipe (20); (c) The concrete 30 is continuously poured into the funnel portion 12 while maintaining the trestle 10, so that the discharge port 13 is blocked by the pressure of the poured concrete 30, Causing the concrete injected into the part (11) to be discharged through the n-th slot (14); (d) The concrete 30 is continuously poured into the funnel portion 12 while maintaining the trestle 10, so that the n-th casting hole 14 is blocked by the pressure of the poured concrete 30 (C) continuing the process of causing the concrete inserted in the pipe section to be discharged through the n-1 th casting port (14) until the primary casting port (14) is closed; and (e) withdrawing the travertine pipe And curing the concrete filled in the steel pipe to complete the concrete filled steel pipe. In the step (b) to (d), the filling height of the concrete inside and outside the pipe unit is maintained at the same level I also provide my concrete filling simplification method.

(A) to (d) are sequentially shown in FIG. 4, and the steps (b) to (d) are performed in the same manner as the concrete filling method in the concrete pipe filling method The concrete filling height inside and outside the pipe section is maintained at the same level.

The steps (a) and (b) are the same as those of the conventional method of filling the inside of a steel pipe using a trestle pipe. However, in the conventional method, after the step (b), the steel pipe is filled with the heavy equipment such as a train by lifting the steel pipe. In the present invention, the step (c) and the step (d) Continue. In the present invention, the steps (b) to (d) are conceptually separated, but are continuously performed in an actual construction process.

The step (c) includes continuously injecting the concrete 30 into the funnel part 12 so that the discharge port 13 is blocked by the pressure of the poured concrete 30, And the concrete 30 is discharged through the n-th slot 14. In the step (d), the n-th slot 14 is blocked by the pressure of the poured concrete 30, The process of causing the concrete 30 charged into the primary charging hole 11 to be discharged through the n-primary charging hole 14 is continued until the primary charging hole 14 is closed.

In the present invention, as the concrete is poured, the discharge port is blocked by the concrete pressure from the lower part of the concrete pipe from the lower part of the pipe part 11, and thereafter the discharge port is blocked from the n-th casting port to the first casting port The concrete pouring work in the steel pipe is completed.

After step (d), the concrete filled steel pipe is pulled out and the concrete filled in the steel pipe is cured to complete the concrete filled steel pipe 20, It can be applied as a column member through the method.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is therefore intended that the appended claims cover such modifications and variations as fall within the true scope of the invention.

10: Treble pipe
11: pipe section 12: funnel section 13: discharge port
14: stall 15: stiffener
20: Steel pipe
30: Concrete

Claims

(a) an upper funnel portion is formed at an upper end thereof, a pipe portion is coupled to a lower portion of the funnel portion, a distal end of the pipe portion is opened to form a discharge port, a step of inserting a steel tube filling tube vertically welded in a vertical direction to a steel pipe installed in the ground, at both sides and a central portion of the casting tool,
(b) pouring concrete into the funnel portion so that the concrete is discharged from the discharge port and raised from the lower portion of the steel pipe;
(c) continuously pouring concrete into the funnel while maintaining the trem canal, thereby causing the concrete poured into the pipe portion to be discharged through the n-th casting hole while the discharge port is blocked by the pressure of the poured concrete ;
(d) The concrete is continuously poured into the funnel while maintaining the trem canal, so that the n-th casting port is blocked by the pressure of the poured concrete, and the concrete put into the pipe is pushed into the n-1th casting pit The method of the present invention includes the steps of:
(e) drawing the trimming tube and curing the filled concrete in the steel pipe to complete the concrete filled steel pipe,
Wherein the filling height of the concrete in the pipe section is maintained at the same level in the steps (b) to (d).

The method of claim 1,
Wherein the pit of the trestle tube is alternately opened toward the opposite direction.

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