KR20090071313A - The earth anchor operate method which reinforces a soft ground and the device - Google Patents

The earth anchor operate method which reinforces a soft ground and the device Download PDF

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KR20090071313A
KR20090071313A KR1020080035496A KR20080035496A KR20090071313A KR 20090071313 A KR20090071313 A KR 20090071313A KR 1020080035496 A KR1020080035496 A KR 1020080035496A KR 20080035496 A KR20080035496 A KR 20080035496A KR 20090071313 A KR20090071313 A KR 20090071313A
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South Korea
Prior art keywords
hole
earth anchor
casing
anchor construction
soft ground
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KR1020080035496A
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Korean (ko)
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KR101024257B1 (en
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최찬희
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최찬희
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74—Means for anchoring structural elements or bulkheads
    • E02D5/80—Ground anchors
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/62—Compacting the soil at the footing or in or along a casing by forcing cement or like material through tubes
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/24—Placing by using fluid jets
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/26—Placing by using several means simultaneously
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00—Materials
    • E02D2300/0004—Synthetics
    • E02D2300/0018—Cement used as binder
    • 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
    • E02D2300/0034—Steel; Iron in wire form

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Piles And Underground Anchors (AREA)

Abstract

An earth-anchor construction method reinforcing weak soil foundation and an apparatus thereof are provided to improve tensile strength of the flexible wire which is grouted because the lower part as well as middle part of the perforation hole can be extended. An earth-anchor construction apparatus(10) reinforcing weak soil foundation comprises a plurality of casings(13) which is placed on the top and is connected to each other, and a tool head(11) which is installed in the lower part thereof. The inner wall of casing is a double pipe which is an air and water supply passage(14). Two or more outlets(12) are formed in the bottom of the supply passage. A supply tube(15) in which the grout is supplied is formed in the inside center of the casing.

Description

연약지반을 보강하는 어스앙카 시공방법 및 그 장치{The earth anchor operate method which reinforces a soft ground and the device}The earth anchor operate method which reinforces a soft ground and the device}

본 발명은 연선 시공으로 연약지반을 보강하는 어스앙카 시공방법 및 그 장치에 관한 것으로서, 좀 더 구체적으로는 지반에 천공을 한 후 천공된 구멍에 부분적으로 고압의 공기나 물을 이용하여 직경을 확장함과 동시에 몰탈(시멘트+모래+물) 또는 밀크(시멘트+물)의 주입이 진행되도록 하여 연약지반의 하부 또는 중간부에 직경이 큰 그라우트 부분이 형성되도록 함으로써 연약지반에 연선을 시공할 때 연선의 인장강도가 향상되도록 한 것에 관한 것이다.The present invention relates to an earth anchor construction method and apparatus for reinforcing soft ground by stranded construction, and more particularly, to expand the diameter by using high pressure air or water in the perforated hole after drilling in the ground. At the same time, the injection of mortar (cement + sand + water) or milk (cement + water) proceeds so that a large diameter grout part is formed in the lower or middle part of the soft ground. It is related to the tensile strength of the improved.

일반적으로 어스앙카 시공방법은 붕괴의 위험성이 큰 지하굴착에 의한 인공 직벽 및 바다 매립으로 이루어진 토지에서의 지하굴착 작업의 안전성을 향상시키기 위하여 상기 굴착면에 인정한 간격으로 구멍을 천공하고, 천공구멍에 와이어 또는 철근 등과 같은 연선을 삽입한 후 그라우팅을 실시하여 사면을 보강하는 공법이다. 이러한 어스앙카 시공방법은 시공된 지반의 인장응력, 전단응력 및 휨 모멘트에 대한 저항력을 증가시키고 이에 따라 굴착공사 도중 및 굴착공사 완료 후 사면파괴에 대한 안정성을 향상시키는 것을 목적으로 하는 지반 보강공법의 일종이다.In general, the earth anchor construction method drills holes at intervals recognized in the excavation surface in order to improve the safety of underground excavation work on land consisting of artificial straight walls and landfills by underground excavation, which has a high risk of collapse. It is a method of reinforcing slope by inserting stranded wire such as wire or reinforcing bar and then grouting. The earth anchor construction method is a method of ground reinforcement that aims to increase the resistance to tensile stress, shear stress, and bending moment of the ground, and thus to improve stability against slope failure during and after the excavation. It is a kind.

종래의 어스앙카 시공방법은 일반적으로 보강이 필요한 굴착면에 구멍을 천공하여 천공구멍을 형성시키는 공정; 상기 천공작업 공정 후 천공구멍에 연선을 삽입하는 공정; 상기 천공구멍을 그라우팅하는 공정; 및 상기 천공구멍의 입구를 막으며 마감 처리하는 공정으로 이루어져 있었다.Conventional earth anchor construction method generally comprises a step of forming a hole by drilling a hole in the excavation surface that needs to be reinforced; Inserting a stranded wire into the drilling hole after the drilling operation process; Grouting the drill hole; And a process of closing the entrance of the punched hole.

상기한 종래의 어스앙카 시공방법은 연약지반이 아닌 경우에는 큰 문제점이 없으나 토사나 갯벌과 같은 연약지반에서는 천공구멍의 직경이 상하가 전체적으로 균일하게 형성되어 있어 연선에 큰 하중이 작용할 경우 그라우팅된 직벽에 변형이 생기게 되는 문제점이 있었다.The conventional ground anchor construction method does not have a big problem in the case of non-soft ground, but in soft ground such as earth and sand, the diameter of the perforated hole is formed uniformly in the upper and lower diameters, so that when a large load is applied to the stranded straight wall There was a problem that the deformation occurs.

이를 제거하기 위하여 대한민국 특허등록 제721786호가 있으나 이는 확장되는 직경이 일정하고, 하부에서만 직경을 확장할 수가 있어 강도를 보강하는데 한계가 있었다.In order to remove this, there is a Korean Patent Registration No. 721786, which has a constant expanding diameter, and only a lower portion thereof can expand the diameter, thereby limiting strength.

즉, 상기 특허는 제 4도에 도시한 바와 같이 케이싱(60)을 시계방향으로 회전시켜 연약지반으로 하강시키면 지반에 구멍이 길게 천공되고, 원하는 깊이만큼 구멍이 천공되면 케이싱을 반대 방향으로 회전시켜 날개(62)가 펴지도록 하면 직경이 큰 구멍을 하부에 형성을 시킬 수 있게 되어 있다.That is, as shown in FIG. 4, when the casing 60 is rotated in the clockwise direction to lower the soft ground, a hole is drilled in the ground for a long time, and when the hole is drilled to a desired depth, the casing is rotated in the opposite direction. When the blade 62 is extended, a hole having a large diameter can be formed in the lower portion.

그런데 상기 특허는 날개의 길이만큼만 직경을 크게 형성할 수 있어 필요에 따라 직경을 크게 해야할 경우 케이싱을 교체해야만 하였기 때문에 케이싱을 다수 제조하여야 하였으며, 위치에 따라 강도를 조절해야 할 경우 작업에 번거로움이 있었을 뿐만 아니라 날개(62)의 크기가 너무 크면 강도가 약해져 크게 하는데 한계가 있었고, 천공된 구멍의 중간 부분에 직경을 부분적으로 크게 할 경우 작업에 어려움이 있었다.By the way, the patent can form a diameter as large as the length of the wing only, if necessary to increase the diameter if the casing had to be replaced because a large number of casing had to be manufactured, and if you need to adjust the strength according to the location hassle to work In addition, if the size of the wing 62 is too large, there is a limit to increase the strength is weakened, there was a difficulty in the case of partially increasing the diameter in the middle portion of the perforated hole.

따라서 본 발명은 상기와 같은 문제점을 제거하기 위하여 창출된 것으로서, 상하로 길게 형성된 천공 구멍에 공기나 물을 이용하여 천공된 구멍의 직경을 원하는 크기로 확장할 수 있도록 함과 아울러 확장되는 위치를 하단부뿐만 아니라 중간 중간에도 형성할 수 있도록 하여 연선의 인장 강도를 향상시킬 수 있는 연약지반을 보강하는 어스앙카 시공방법 및 그 장치를 제공하는데 발명의 목적이 있는 것이다.Therefore, the present invention was created in order to eliminate the above problems, using the air or water in the long hole formed in the upper and lower to expand the diameter of the punched hole to the desired size as well as the extended position In addition, it is an object of the invention to provide an earth anchor construction method and apparatus for reinforcing a soft ground that can be formed in the middle of the middle to improve the tensile strength of the stranded wire.

상기 목적을 달성하기 위한 본 발명의 특징은 보강이 필요한 굴착면에 구멍을 천공하여 천공구멍을 형성시키는 공정; 상기 천공작업 공정 후 천공구멍에 연선을 삽입하는 공정; 상기 천공구멍을 그라우팅하는 공정; 상기 천공구멍의 입구를 막으며 마감처리하는 공정으로 이루어진 어스앙카 시공방법에 있어서, 상기 연선 삽입 공정 후 어스앙카 시공장치를 회전시키면서 공구헤드의 상부에서 공기나 물을 고압으로 분사시킴과 동시에 천공구멍을 그라우팅시키는 공정을 더 부가하도록 한 것으로서, 이하 첨부된 도면에 의거하여 본 발명의 구성을 상세히 설명하면 다음과 같다.Features of the present invention for achieving the above object is a step of forming a hole by drilling a hole in the excavation surface that needs to be reinforced; Inserting a stranded wire into the drilling hole after the drilling operation process; Grouting the drill hole; In the earth anchor construction method comprising the process of closing the inlet of the drilling hole, the air hole and water at the top of the tool head while rotating the earth anchor factory after inserting the stranded wire and at the same time the drilling hole The grouting process is to be further added, and the configuration of the present invention will be described in detail below with reference to the accompanying drawings.

본 발명은 상하로 길게 형성된 천공구멍에 공기나 유압을 이용하여 천공된 구멍의 직경을 원하는 크기로 확장할 수 있도록 함과 아울러 확장되는 위치를 하단부만 아니라 중간 중간에도 형성할 수 있기 때문에 그라우팅된 연선의 인장 강도를 향상시킬 수 있는 효과가 있는 것이다.The present invention allows the diameter of the drilled hole to be expanded to a desired size by using air or hydraulic pressure in the drilled hole formed vertically up and down, and the expanded position can be formed not only at the lower end but also in the middle, the grouted stranded wire. There is an effect that can improve the tensile strength of.

도 1은 본 발명에 의한 어스앙카 시공방법의 공정을 나타낸 개략도이고, 도 2는 본 발명에 의해 형성된 연약지반 보강상태를 나타낸 단면도이며, 도 3은 본 발명에 의한 어스앙카 시공장치를 나타낸 부분단면도이다.1 is a schematic view showing the process of the earth anchor construction method according to the present invention, Figure 2 is a cross-sectional view showing a soft ground reinforcement state formed by the present invention, Figure 3 is a partial cross-sectional view showing the earth anchor factory factory according to the present invention to be.

도 1에 도시된 바와 같이 보강이 필요한 사면에 어스앙카 시공장치(10)를 회동시켜 구멍(1)을 원하는 깊이로 천공한 후 상기 천공 구멍(1)에 연선(2)을 삽입한 다음 어스앙카 시공장치(10)를 회전시키면서 공구헤드(11)의 상부로 공기나 물을 고압으로 분사시킴과 동시에 공구헤드(11)의 하단으로는 그라우트(3)를 분사시켜 천공구멍을 그라우팅시키면서 서서히 상승을 시킨다.As shown in FIG. 1, the earth anchor construction device 10 is rotated on a slope requiring reinforcement to drill the hole 1 to a desired depth, and then the stranded wire 2 is inserted into the drilling hole 1, and then the earth anchor While rotating the construction device 10, the air or water is sprayed to the upper part of the tool head 11 at a high pressure, and the grout 3 is sprayed to the lower end of the tool head 11 to gradually raise the boring hole. Let's do it.

즉, 종래와 동일한 방법으로 사면에 구멍(1)을 천공하여 연선(2)을 위치시킨 후 어스앙카 시공장치(10)의 내벽에 형성된 공급로(14)로 공기나 물 또는 공기와 물이 혼합된 혼합액을 고압으로 공급을 하면 공기나 물은 토출구(12)를 통해 천공 구멍으로 분사되고, 분사된 물이나 공기는 천공 구멍의 내벽에 고압으로 분사되어 내벽의 직경을 확장시키게 된다.That is, in the same manner as before, the hole 1 is drilled on the slope to position the stranded wire 2, and then air or water or air and water are mixed in the supply passage 14 formed on the inner wall of the earth anchor construction device 10. When the mixed liquid is supplied at a high pressure, air or water is injected into the drilling hole through the discharge port 12, and the injected water or air is injected at a high pressure into the inner wall of the drilling hole to expand the diameter of the inner wall.

이때, 어스앙카 시공장치(10)의 중앙부로는 콘크리트 몰탈 등과 같은 그라우트(3)을 공급을 하게 되는데, 내벽이 원하는 직경으로 확장되면 서서히 어스앙카 시공장치(10)를 상승시키면 직경이 확장된 확장부(4)에 그라우트가 충진을 하게 된다.At this time, the center portion of the earth anchor construction device 10 is to supply a grout (3), such as concrete mortar, when the inner wall is extended to the desired diameter, gradually raising the earth anchor construction device (10) to expand the diameter Grout is filled in the portion (4).

상기와 같은 상태로 하여 어스앙카 시공장치(10)를 상승시키다가 확장부(4)를 더 이상 형성시킬 필요가 없게 되면 공기나 물의 공급을 중단하고, 그 후 다시 확장부(4)가 필요하면 재차 공기나 물을 공급하면 천공 구멍의 직경이 확대되면서 그라우트가 충진되게 되는 것으로 청공구멍(1) 상단까지 그라우트(4)가 충진되면 구멍(1)의 상단을 마감 처리한다.When the earth anchor construction device 10 is raised in the above state and the expansion unit 4 is no longer needed, the supply of air or water is stopped, and when the expansion unit 4 is needed again. When the air or water is supplied again, the diameter of the drilling hole is enlarged so that the grout is filled. When the grout 4 is filled up to the top of the blue hole 1, the upper end of the hole 1 is finished.

상기 어스앙카 시공장치(10)는 도 3에 도시한 바와 상부에는 케이싱(13)을 다수 연결하여 실시할 수 있게 형성되고, 하부에는 공구헤드(11)를 설치하되, 상기 케이싱의 내벽을 이중관으로 형성하여 공기 및 물 공급로(14)가 형성되도록 하고, 공급로(14)의 하단에는 토출구(12)를 2개 이상 형성하며, 상기 케이싱(13)의 내부 중앙에는 그라우트(4)가 공급되는 공급관(15)를 형성한다.The earth anchor construction device 10 is formed to be carried out by connecting a plurality of casing 13 in the upper bar as shown in Figure 3, the tool head 11 is installed in the lower, the inner wall of the casing as a double pipe It is formed so that the air and water supply path 14 is formed, at least two discharge ports 12 are formed at the lower end of the supply path 14, the grout 4 is supplied to the inner center of the casing 13 The supply pipe 15 is formed.

상기와 같이 구성된 본 발명은 공급로(14)로 공기나 물 또는 공기와 물이 혼합된 혼합액을 고압으로 공급하면 토출구(12)를 통해 분사되게 되는데, 지반이 갯벌 등과 같이 연약한 지반으로 형성되어 있으므로 천공구멍(1)이 확장되는 것으로 분사되는 압력이나 시간 등은 확장부(4)의 직경에 따라 적정히 조절을 하면서 공구헤드(11)를 상승시키면 케이싱의 중앙 공급관(15)으로 그라우트(3)가 공급되어 확장부(4)를 형성시킬 수 있게 된다.In the present invention configured as described above, when the air or water or the mixed liquid mixed with air and water is supplied at a high pressure to the supply path 14, the sprayed through the discharge port 12. Since the ground is formed of a soft ground such as a tidal flat, The pressure or time to be injected as the drilling hole 1 is expanded and the tool head 11 is raised while appropriately adjusting according to the diameter of the expansion part 4 is applied to the central supply pipe 15 of the casing. Can be supplied to form the expansion portion (4).

도 1은 본 발명에 의한 어스앙카 시공방법의 공정을 나타낸 개략도.1 is a schematic view showing a process of earth anchor construction method according to the present invention.

도 2는 본 발명에 의해 형성된 연약지반 보강상태를 나타낸 단면도.Figure 2 is a cross-sectional view showing a soft ground reinforcement state formed by the present invention.

도 3은 본 발명에 의한 어스앙카 시공장치를 나타낸 부분단면도.Figure 3 is a partial cross-sectional view showing the earth anchor factory factory in accordance with the present invention.

도 4는 종래도.4 is a conventional diagram.

*도면의 주요 부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

1 : 천공구멍 2 : 연선1: drilled hole 2: stranded wire

3 : 그라우트 4 : 확장부3: grout 4: extension part

10 : 어스앙카 시공장치 11 : 공구헤드10: Earth anchor construction device 11: Tool head

12 : 토출구 13 : 케이싱12 discharge port 13 casing

14 : 공급로 15 : 공급관14: supply path 15: supply pipe

Claims (2)

보강이 필요한 굴착면에 구멍을 천공하여 천공구멍을 형성시키는 공정; 상기 천공구멍작업 공정 후 천공구멍에 연선을 삽입하는 공정; 상기 천공구멍을 그라우팅하는 공정; 상기 천공구멍의 입구를 막으며 마감처리하는 공정으로 이루어진 어스앙카 시공방법에 있어서, 상기 연선 삽입 공정 후 어스앙카 시공장치를 회전시키면서 공구헤드의 상부에서 공기나 물을 고압으로 분사시킴과 동시에 천공구멍을 그라우팅시키는 공정을 더 부가하도록 한 것을 특징으로 하는 연약지반을 보강하는 어스앙카 시공방법.Forming a hole by drilling a hole in the excavation surface that needs to be reinforced; Inserting a stranded wire into the drilling hole after the drilling hole working step; Grouting the drill hole; In the earth anchor construction method comprising the process of closing the inlet of the drilling hole, the air hole and water at the top of the tool head while rotating the earth anchor factory after inserting the stranded wire and at the same time the drilling hole Earth anchor construction method to reinforce the soft ground, characterized in that to further add a step of grouting. 상부에는 케이싱(13)을 다수 연결하여 실시할 수 있게 형성되고, 하부에는 공구헤드(11)가 설치된 어스앙카 시공장치에 있어서, 상기 케이싱(13)의 내벽을 이중관으로 형성하여 공기 및 물 공급로(14)가 형성되도록 하고, 공급로(14)의 하단에는 토출구(12)를 2개 이상 형성하며, 상기 케이싱(13)의 내부 중앙에는 그라우트(4)가 공급되는 공급관(15)를 형성한 것을 특징으로 하는 연약지반을 보강하는 어스앙카 시공장치.In the upper anchor construction device is formed so that the casing 13 can be connected to the upper part, and the tool head 11 is installed at the lower part, the inner wall of the casing 13 is formed as a double pipe to supply air and water. 14 to be formed, and at least two discharge ports 12 are formed at the lower end of the supply passage 14, and a supply pipe 15 to which the grout 4 is supplied is formed at the inner center of the casing 13. Earth anchor construction device to reinforce the soft ground, characterized in that.
KR1020080035496A 2008-04-17 2008-04-17 The earth anchor operate method which reinforces a soft ground and the device KR101024257B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107806096A (en) * 2017-10-30 2018-03-16 陕西隆极机械设备有限公司 Expanding compound pile construction method compacted again is cut in churning
KR102225882B1 (en) * 2019-12-17 2021-03-09 류시일 Double casing and compaction grouting method using the same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050037911A (en) * 2003-10-20 2005-04-25 한미기초개발주식회사 Method and apparatus of multi-jet compaction grouting, jcg
KR100666678B1 (en) * 2004-10-29 2007-01-19 지앤에스건설 주식회사 Micro-pile having a end supporting round-plate
KR20060103760A (en) * 2005-03-28 2006-10-04 지앤에스건설 주식회사 Micro-pile installing method using expanded fixing part

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107806096A (en) * 2017-10-30 2018-03-16 陕西隆极机械设备有限公司 Expanding compound pile construction method compacted again is cut in churning
KR102225882B1 (en) * 2019-12-17 2021-03-09 류시일 Double casing and compaction grouting method using the same

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