KR100263660B1 - Perforated reinforcing strips for earth reinforcement - Google Patents

Perforated reinforcing strips for earth reinforcement Download PDF

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Publication number
KR100263660B1
KR100263660B1 KR1019980008735A KR19980008735A KR100263660B1 KR 100263660 B1 KR100263660 B1 KR 100263660B1 KR 1019980008735 A KR1019980008735 A KR 1019980008735A KR 19980008735 A KR19980008735 A KR 19980008735A KR 100263660 B1 KR100263660 B1 KR 100263660B1
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South Korea
Prior art keywords
reinforcement
soil
protrusions
retaining wall
reinforcing material
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KR1019980008735A
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Korean (ko)
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KR19990074854A (en
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이상덕
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이상덕
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Priority to KR1019980008735A priority Critical patent/KR100263660B1/en
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/02—Retaining or protecting walls
    • E02D29/0258—Retaining or protecting walls characterised by constructional features
    • E02D29/0266—Retaining or protecting walls characterised by constructional features made up of preformed elements
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/02—Retaining or protecting walls
    • E02D29/0225—Retaining or protecting walls comprising retention means in the backfill
    • E02D29/0241—Retaining or protecting walls comprising retention means in the backfill the retention means being reinforced earth elements
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00—Materials
    • E02D2300/0026—Metals
    • E02D2300/0029—Steel; Iron

Abstract

PURPOSE: A reinforcement for a retaining wall is provided to improve drawing resistance of a reinforcement by forming plural protrusions on a reinforcement and forming through holes on a perpendicular face of the protrusions and at a part of the reinforcement. CONSTITUTION: A reinforcement for a retaining wall has plural through holes(14) for filling the horizontal face of a regular reinforcement(13) with soil. Friction between the soil and the reinforcement is 1/3-2/3 of an inner friction angle of the soil. Thereby, the soil is filled in each through hole on the horizontal face of the reinforcement and contacted each other. The friction resistance gets larger than one having no through hole. The reinforcement includes plural protrusions. In a drawing process, soil ground is compressed to the protrusion portions of the reinforcement. Therefore, the reinforcement has the maximum drawing resistance.

Description

지반 보강용 유공 보강재Perforated Reinforcement for Ground Reinforcement

본 발명은 지반 보강용 유공 보강재에 관한 것으로, 더욱 자세하게는 보강토 옹벽에 사용되는 강재 보강재에 있어, 인발저향력을 향상시키기 위해 강재 보강재의 수평면에 다수개의 관통홀이 형성된 강재 보강재에 관한 것이다.The present invention relates to a perforated reinforcement for ground reinforcement, and more particularly, to a steel reinforcement used for the retaining soil retaining wall, to a steel reinforcement formed with a plurality of through-holes in the horizontal plane of the steel reinforcement to improve the pulling resistance.

일반적으로 보강토 옹벽은 도1에 도시된 바와 같이 전면판(11), 보강재(12), 뒤채움 흙으로 구성되는데, 여기서 보강토 옹벽의 벽체를 구성하는 전면판(11)은 뒷채움 흙의 유실을 방지하고, 보강재(12)를 연결시키며, 구조물의 외관상 시각적 효과를 높혀주는 기능을 한다. 일반적으로, 전면판(11)의 종류로는 프리캐스트 콘크리트 판(Precast Concrete Panel), 금속재 전면판, 그리고 합성수지 전면판과 같은 것이 있다.In general, the reinforcement earth retaining wall is composed of the front plate 11, the reinforcement 12, the backfilling soil, as shown in Figure 1, wherein the front plate 11 constituting the wall of the reinforcement earth retaining wall to prevent the loss of backfilling soil And, connecting the reinforcing material 12, and serves to increase the visual effect of the structure. In general, types of the front plate 11 include a precast concrete panel, a metal front plate, and a synthetic resin front plate.

또한, 보강토 공법에 사용되는 보강재(12)는 지반의 인장강도를 보강하기 위해 사용되며, 보강재(12)는 지반과의 접촉면에서의 마찰력에 의해 인발에 대하여 저항함으로써, 그 기능이 이루어진다. 이러한 보강재(12)의 종류로는 일반적으로 토목섬유 보강재, 스트립 형태의 보강재, 그리고 강재 보강재 등이 있다. 이러한 보강재(12) 중 본 발명은 강재 보강재를 개량한 것이다.In addition, the reinforcing material 12 used in the reinforcement earth method is used to reinforce the tensile strength of the ground, the reinforcing material 12 by the frictional force on the contact surface with the ground, the function is achieved. Types of such reinforcement 12 are generally geotextile reinforcement, strip-shaped reinforcement, and steel reinforcement. Of these reinforcement 12, the present invention is an improvement of the steel reinforcement.

도1에 도시된 일반적인 보강토 옹벽에 있어서, 보강토 옹벽의 안정성은 뒷채움부의 예상 파괴면 뒤에 위치한 길이 ℓe인 보강재(12) 부분에 의하여 유발되는 인발 저항력에 의해 결정된다.In the general reinforcement retaining wall shown in FIG. 1, the stability of the reinforcement retaining wall is determined by the pullout resistance induced by the portion of the reinforcement 12 of length L e located behind the expected fracture surface of the backfill.

그러므로, 충분한 마찰력을 확보하기 위해서는 강재 보강재의 폭을 넓게 하고, 유효길이(ℓe)를 여유있게 확보하여야만 하나, 이로 인해 시공 높이가 제한되거나, 절·성토량이 증가하여 공사비가 증가되는 문제점이 있다. 한편, 상기 문제점을 개선하기 위하여 강재 보강재에 돌기를 용접해서 부착하는 방법이 제시되기도 하였다. 그러나, 이 방법은 보강재 제작에 인력과 비용이 추가되어 공사비의 증가 요인이 되며, 돌기를 보강재에 용접해서 부착하는 과정에서 용접열 등에 의하여 재료가 변성될 수 있는 문제점이 있다.Therefore, in order to secure sufficient frictional force, the width of the steel reinforcement should be widened and the effective length (ℓ e ) should be secured marginally. However, the construction height is limited or the construction cost is increased due to the increase in the amount of cut and fill. . On the other hand, in order to improve the problem has been proposed a method of welding by attaching the projection to the steel reinforcement. However, this method is a factor in the increase of construction cost by adding manpower and cost to the reinforcement fabrication, there is a problem that the material can be modified by the heat of welding in the process of welding and attaching the projection to the reinforcement.

따라서, 본 발명은 상기와 같은 종래 기술의 문제점을 해결하기 위하여 안출된 것으로, 본 발명은 강재 보강재의 상면에 다수개의 돌출부를 형성하고, 상기 돌출부의 직각면과 상기 강재 보강재의 일부분에 관통홀을 형성함으로써, 보강재의 인발저항력을 크게 향상시키고, 경제적인 보강토 옹벽용 보강재를 제공하는데 그 목적이 있다.Accordingly, the present invention has been made to solve the problems of the prior art as described above, the present invention forms a plurality of protrusions on the upper surface of the steel reinforcement, and the through-holes in the right angle surface of the protrusion and a portion of the steel reinforcement. By forming, the draw resistance of a reinforcement material is greatly improved, and the objective is to provide an economical reinforcement for a retaining soil retaining wall.

도1은 종래의 보강토 옹벽 시공 단면을 나타낸 도면.1 is a view showing a cross section of a conventional reinforced earth retaining wall construction.

도2는 본 발명에 따른 지반 보강용 유공 보강재의 일실시 예시도.Figure 2 is an exemplary view of a ground reinforcing hole reinforcing material according to the present invention.

도3a 및 3b는 본 발명에 따른 지반 보강용 유공 보강재의 다른 실시 예시도.Figure 3a and 3b is another embodiment of the ground reinforcing hole reinforcing material according to the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

11 : 전면판 12 : 보강재11: front panel 12: reinforcement

13 : 강재 보강재 14 : 관통홀13 steel reinforcement material 14 through hole

15 : 돌출부15: protrusion

상기 목적을 달성하기 위한 본 발명은, 옹벽 전면판과 결합되어 보강토 옹벽의 보강용으로 이용되는 지반 보강용 강재 보강재에 있어서, 상기 강재 보강재의 상면에 형성된 다수개의 돌출부를 포함하되, 상기 돌출부 각각은, 상기 보강재의 수평면과 접하는 상기 옹벽 전면판 방향인 일측이 직각지도록 형성되고, 타측이 완만하게 경사지도록 형성되며, 상기 돌출부의 직각면과, 상기 직각면에 접하는 상기강재 보강재의 수평면은 절개되어 관통홀이 형성된 것을 특징으로 한다.The present invention for achieving the above object is a ground reinforcing steel reinforcement is used for the reinforcement of the retaining wall retaining wall combined with the retaining wall front plate, including a plurality of protrusions formed on the upper surface of the steel reinforcing material, each of the protrusions One side in the direction of the retaining wall front plate in contact with the horizontal surface of the reinforcing material is formed to be perpendicular to the other side, and the other side is formed to be inclined gently, the right angled surface of the protrusion and the horizontal surface of the steel reinforcing material in contact with the right angled surface is cut through. Characterized in that the hole is formed.

이하, 첨부된 도2 이하를 참조하여 본 발명의 실시예를 상세히 설명하기로 한다.Hereinafter, embodiments of the present invention will be described in detail with reference to FIG. 2.

도2는 본 발명에 따른 개량된 보강토 옹벽용 강재 보강재의 외관도로서, 13은 강재 보강재, 14는 관통홀을 각각 나타낸다.2 is an external view of an improved reinforcement earth retaining wall steel reinforcement according to the present invention, 13 is a steel reinforcement, 14 is a through hole, respectively.

본 발명의 출원인은 일반적으로 흙과 보강재 사이의 마찰이 흙의 내부 마찰각보다 작아 흙과 접할 수 있는 부분이 있으면 마찰 저항이 커진다는 점에 착안하여 본 발명의 개량된 강재 보강재를 개발하였다.Applicants of the present invention have developed the improved steel reinforcement of the present invention in the light of the fact that the friction between the soil and the reinforcing material is less than the internal friction angle of the soil, the frictional resistance increases if there is a part that can contact the soil.

즉, 도2에 도시된 바와 같이 일반적인 강재 보강재(13)의 수평면에 흙이 들어가 메워질 수 있도록 다수개의 관통홀(14)을 형성한다. 일반적으로 흙과 보강재 사이의 마찰은 흙의 내부 마찰각의 1/3 ∼ 2/3정도이기 때문에 이와 같이 강재 보강재(13)의 수평면에 관통홀(14)들을 형성하면, 각각의 관통홀(14)내로 흙이 체워져, 결국 흙과 흙이 접촉되므로, 이때의 마찰 저항은 관통홀이 없는 경우의 마찰저항보다 훨씬 커지게 된다.That is, as shown in FIG. 2, a plurality of through holes 14 are formed to allow soil to be filled in the horizontal plane of the general steel reinforcement 13. In general, the friction between the soil and the reinforcement is about 1/3 to 2/3 of the internal friction angle of the soil. Thus, when the through holes 14 are formed in the horizontal surface of the steel reinforcement 13, each through hole 14 is formed. Since the soil is filled into the soil, and the soil and the soil eventually come into contact with each other, the frictional resistance at this time becomes much larger than the frictional resistance without the through hole.

도2에 도시된 본 발명의 강재 보강재의 관통홀은 동일한 목적을 이루면서도 다양한 형태를 가질 수 있다는 것은 자명한 것이므로, 본 발명의 권리범위가 도면에 도시된 것에 한정되는 것은 아니다.Since the through-holes of the steel reinforcement of the present invention shown in Figure 2 may have a variety of forms while achieving the same purpose, the scope of the present invention is not limited to those shown in the drawings.

도3a 및 도3b는 본 발명에 따른 강재 보강재의 관통홀을 변형하여 인발저항력을 더욱 향상시킨 것이다.3a and 3b is to further improve the pull resistance by modifying the through hole of the steel reinforcing material according to the present invention.

도3a에 도시된 본 발명에 따른 유공 보강재는, 보강재의 상면에 측면에서 보았을 때, 직 삼각형 형상이 되도록 다수개의 돌출부(15)들을 형성한다. 즉, 상기 돌출부(15)들은 각각 옹벽의 전면판(11) 방향의 직각면과 상기 직각면과 접하는 강제 보강재의 수평면의 일부분이 절개되어 관통홀(14)이 형성되어 있다.The hole reinforcing material according to the present invention shown in Figure 3a, when viewed from the side of the upper surface of the reinforcement to form a plurality of protrusions 15 to be a straight triangular shape. That is, each of the protrusions 15 has a through-hole 14 formed by cutting a right angled surface in the direction of the front plate 11 of the retaining wall and a portion of a horizontal surface of the steel reinforcement contacting the right angled surface.

도3b에 도시된 본 발명에 따른 유공 보강재 또한 보강재의 상면에 다수개의 돌출부(15)들이 형성되고, 이 돌출부(15)들은 옹벽의 전면판(11) 방향의 직각을 이룬 일측면에 관통홀(14)이 형성되고, 타측면은 완만하게 경사지도록 형성되어 있다. 이와 같이 보강재에 돌출부와 관통홀을 동시에 형성할 경우, 보강재의 인발저항력은 더욱 향상된다. 특히, 돌출부(15)의 직각 혹은 그 정도의 경사각을 갖는 부분에서는 인발시 앵커처럼 보강재 돌출부에 흙지반이 압축되면서 생기는 수동토압에 의해서 보강재의 인발저항력이 극대화 된다. 수동토압이란 지반이 압축되면서 생기는 흙의 압력으로 토압중 가장 크며, 앵커와 널말뚝이 이와 같은 원리를 이용한 대표적인 것들이다.The hole reinforcement according to the present invention shown in Figure 3b is also formed with a plurality of protrusions 15 on the upper surface of the reinforcement, these protrusions 15 are through-holes on one side of the retaining wall perpendicular to the direction of the front plate (11) 14) is formed, and the other side is formed to be gently inclined. As such, when the protrusion and the through hole are simultaneously formed in the reinforcement, the pullout resistance of the reinforcement is further improved. In particular, in the portion having a right angle or the angle of inclination of the protrusion 15, the pullout resistance of the reinforcement is maximized by the manual earth pressure generated when the soil ground is compressed to the reinforcement protrusion like the anchor when drawing. Passive earth pressure is the pressure of soil generated when the ground is compressed, which is the largest of the earth pressures, and anchors and board piles are the representative ones using this principle.

따라서, 상기와 같이 이루어지는 본 발명의 강재 보강재는, 보강재의 상면에 다수개의 돌출부와 관통홀을 동시에 형성함으로써, 마찰에 의한 인발저항 뿐만 아니라 구멍을 뚫어 마찰 특성을 증대시키고, 돌출부에 의해 보강재의 인발저항력을 크게 향상시켰으며, 공장에서 대량생산할 경우에 프레스와 같은 단순한 작업을 통해 경제적으로 생산할 수 있는 효과가 있다.Therefore, the steel reinforcement of the present invention made as described above, by simultaneously forming a plurality of protrusions and through-holes on the upper surface of the reinforcement, as well as the pull-out resistance due to friction, to increase the friction characteristics by drilling holes, and the drawing of the reinforcement by the protrusions The resistance is greatly improved, and when mass-produced in a factory, there is an effect that can be economically produced through a simple operation such as a press.

Claims (1)

옹벽 전면판과 결합되어 보강토 옹벽의 보강용으로 이용되는 지반 보강용 강재 보강재에 있어서, 상기 강재 보강재의 상면에 형성된 다수개의 돌출부를 포함하되, 상기 돌출부 각각은, 상기 보강재의 수평면과 접하는 상기 옹벽 전면판 방향인 일측이 직각지도록 형성되고, 타측이 완만하게 경사지도록 형성되며, 상기 돌출부의 직각면과, 상기 직각면에 접하는 상기 강재 보강재의 수평면은 절개되어 관통홀이 형성된 것을 특징으로 하는 강재 보강재.A ground reinforcing steel reinforcing material combined with a retaining wall front plate for use in reinforcing earth retaining walls, the steel reinforcing material including a plurality of protrusions formed on an upper surface of the steel reinforcing material, wherein each of the protrusions is in contact with a horizontal surface of the reinforcing material. One side in the plate direction is formed to be perpendicular to the other side, the other side is formed to be inclined gently, the right angled surface and the horizontal surface of the steel reinforcing material in contact with the right angled surface is cut in the steel reinforcement characterized in that the through-hole is formed.
KR1019980008735A 1998-03-16 1998-03-16 Perforated reinforcing strips for earth reinforcement KR100263660B1 (en)

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KR101037502B1 (en) * 2008-03-13 2011-05-26 극동건설주식회사 Reinforcement

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4723842Y1 (en) * 1964-09-17 1972-07-29
US4804299A (en) * 1986-07-09 1989-02-14 United International, Inc. Retaining wall system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4723842Y1 (en) * 1964-09-17 1972-07-29
US4804299A (en) * 1986-07-09 1989-02-14 United International, Inc. Retaining wall system

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