KR20010079163A - Construction method of a composite ground using controlled modulus columns for the improvement of compressible soils - Google Patents

Construction method of a composite ground using controlled modulus columns for the improvement of compressible soils Download PDF

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Publication number
KR20010079163A
KR20010079163A KR1020010034812A KR20010034812A KR20010079163A KR 20010079163 A KR20010079163 A KR 20010079163A KR 1020010034812 A KR1020010034812 A KR 1020010034812A KR 20010034812 A KR20010034812 A KR 20010034812A KR 20010079163 A KR20010079163 A KR 20010079163A
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South Korea
Prior art keywords
ground
soft
concrete
concrete pile
mixed
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KR1020010034812A
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Korean (ko)
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임철웅
코그농장-마리에
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임철웅
추후보정
메나르드-솔트레이트먼트
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Priority to KR1020010034812A priority Critical patent/KR20010079163A/en
Publication of KR20010079163A publication Critical patent/KR20010079163A/en

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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
    • E02D5/22—Piles
    • E02D5/48—Piles varying in construction along their length, i.e. along the body between head and shoe, e.g. made of different materials along their length
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2250/00—Production methods
    • E02D2250/003—Injection of material
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil

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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

PURPOSE: A construction method for composing a composite ground of a cohesive soil poor ground is provided to install a plurality of ductile concrete piles in the poor ground by a proper interval for uniformly distributing a load of a structure established on the poor ground and improving the strength of the ground by the large flexibility with respect to the bending stress or breakage stress. CONSTITUTION: A construction method for composing a composite ground of a cohesive soil poor ground includes the steps of making a hole in a poor ground(9) by a screw drill(1), injecting mixed ductile concrete(10) formed by adding elastic materials(rubber powder;12) and mixed fiber(13) to cement concrete(14) to the hole via a hollow part(8) of the screw drill, thereby obtaining a ductile pile(11), and installing a plurality of such a ductile concrete pile to the poor ground by a proper interval, wherein a plurality of net bag type ductile concrete piles filled with the ductile mixture concrete are able to be used instead of the ductile piles.

Description

점성토 연약지반의 복합지반 조성을 위한 시공법 및 그 시공물의 구조와 연성 콘크리트 말뚝의 제조방법 및 연성 콘크리트 말뚝{CONSTRUCTION METHOD OF A COMPOSITE GROUND USING CONTROLLED MODULUS COLUMNS FOR THE IMPROVEMENT OF COMPRESSIBLE SOILS}Construction method for the construction of composite ground of cohesive soft ground, structure of the construction and manufacturing method of soft concrete pile

본 발명은 준설토 투기장의 연약지반이나 해안, 강변, 간석지, 연못 또는 늪지대 등의 안정이 안된 점성토로 이루어진 연약지반상에 격납고, 철근창고, 유류탱크 등의 단층 구조물을 축조하거나 지반의 침하를 다소 허용할 수 있는 도로나 단지 등의 구조물을 축조하기 위하여 제안된 점성토 연약지반의 복합지반 조성을 위한 시공법 및 그 시공물의 구조와 연성 콘크리트 말뚝의 제조방법 및 연성 콘크리트 말뚝에 관한 것으로서,The present invention allows the construction of single-layered structures such as silos, reinforcing warehouses, oil tanks, or the settlement of soils on soft grounds consisting of unstable viscous soils such as dredged soil dumps or coastal, riversides, tidal flats, ponds or swamps. The present invention relates to a construction method for constructing a composite ground of a viscous clay soft ground, a structure of the construction, a method of manufacturing flexible concrete piles, and a flexible concrete pile,

스크류드릴로 연약지반의 지중을 뚫은 다음, 시멘트 콘크리트에 적정량의 탄성물질(고무가루)과 장,단섬유가 혼합된 연성콘크리트를 상기 스크류드릴의 중공부를 통하여 주입하거나 혹은 망포자루의 내부에 충진시켜 얻어지는 망포자루형 연성 콘크리트 말뚝을 점성토 연약지반에 적정 간격으로 시공 설치하므로써 점성토 연약지반의 복합지반이 조성되어 점성토 연약지반상에 설치하는 시설물의 하중이 고르게 분산 지지될 수 있도록 한 것이다.After drilling the ground of the soft ground with a screw drill, injecting the flexible concrete mixed with an appropriate amount of elastic material (rubber powder) and long and short fibers in the cement concrete through the hollow portion of the screw drill or filling the inside of the mesh cloth By installing and installing the net cloth pile-type soft concrete piles in the clay clay soft ground at appropriate intervals, the composite soil of the clay clay soft ground is formed so that the load of the facilities installed on the clay clay soft ground can be evenly distributed and supported.

종래에 일반적으로 연약지반은, 연약지반을 형성하고 있는 점성토내에 수분이 다량으로 포함되어 자립의존도가 취약하여 지반이 불안정한 상태이므로 외압에 의한 지지력과 지반의 강도가 취약하여 구조물을 설치할 수가 없으며, 연약지반의 특성상 대량 압밀, 침하현상이 장기간에 걸쳐서 계속적으로 진행하게 됨은 물론, 구조물 등의 하중에 의한 지중의 전단 파괴로 인하여 시간이 흐름에 따라 발생하게되는 연약지반상에 설치한 구조물의 피해를 적게 하기 위하여 시멘트콘크리트에 철근이나 철사를 심재로 하여, 이미 제작된 철근콘크리트말뚝을 직접 박아 연약지반의 암반에 지지되도록 설치하였다.Conventionally, the soft ground generally contains a large amount of moisture in the viscous soils forming the soft ground, so that the dependence of self-reliance is weak and the ground is unstable. Therefore, the structure cannot be installed due to the weakness of external force and the strength of the ground. Due to the characteristics of the ground, the mass consolidation and settlement phenomenon continue to proceed for a long time, as well as the damage of the structure installed on the soft ground that occurs over time due to the shear failure of the ground caused by the load of the structure, etc. In order to reinforce the concrete or reinforced concrete in the cement concrete in order to directly drive the reinforced concrete piles were installed so as to support the rock of soft ground.

이와 같은 종래의 철근콘크리트 말뚝은 별도로 제작하는 기간이 소요되고, 이미 제작된 철근콘크리트말뚝을 연약지반에 직접 박아 설치하는 경우는 말뚝의 타입심도가 깊은 암반까지 도달하도록 설치하여야 됨으로 설치비용이 높아지는 결점이 있었다.Such conventional reinforced concrete piles require a separate manufacturing period, and when the reinforced concrete piles are directly driven and installed in the soft ground, the installation cost must be installed to reach a rock with a deep type depth of the pile. There was this.

또한, 2000년 10월 31일자 특허출원 제64382호로 출원하여 제안된 시공법에 있어서는, 연약지반에 수직깊이로 뚫어 설치하는 수직홀의 내부에 강관통에 의하여 늘어 뜨려지게 설치한 망포자루의 내부로 단순히 시멘트콘크리트만을 직접 주입하는 시공법으로써, 시멘트콘크리트가 수직홀의 내부가 되는 망포자루의 내부로 정확하게 투입되어 필요 이상의 시멘트콘크리트가 손실되지 않는 이점은 있었으나 콘크리트말뚝이 휨응력이나 파열응력에 대해서는 저항능력이 부족한 등의 결점이 있었다.In addition, in the proposed construction method, filed with a patent application No. 64382 dated October 31, 2000, cement is simply inserted into the inside of a mansard bag installed by a steel pipe inside a vertical hole drilled vertically in a soft ground. As a construction method that directly injects concrete only, cement concrete is precisely injected into the inside of the netting bag which becomes the inside of the vertical hole, so that the cement concrete is not lost more than necessary, but the concrete pile lacks resistance to bending stress or rupture stress. There was this.

또한, 도 5 에서 종래 콘크리트 말뚝을 시공한 상태를 보인 1예의 단면도로서, 도시한 바와 같이, 연약지반(101)을 뚫고 콘크리트 말뚝(102)을 암반(103)에 까지 걸쳐 시공하고 상부에 기반(100)을 씌워 마무리하고 있으나, 이러한 구조는 콘크리트 말뚝(102)이 반드시 암반(103)에 까지 시공 설치하게 되므로 수직하중의 지지력에는 적을할 수 있으나, 횡하중이나 수평하중에는 내응력이 부족하는 문제점이 있었다.In addition, a cross-sectional view of an example showing a state in which the conventional concrete piles in Figure 5, as shown, through the soft ground 101, the concrete pile 102 to the construction over the rock 103 and the base ( 100) is covered, but this structure is concrete concrete 102 is installed on the rock 103 must be installed because it can be less for the support of vertical load, but the problem of lack of stress in the horizontal load or horizontal load there was.

본 발명은 준설토 투기장의 연약지반이나 해안, 강변, 간석지, 연못 또는 늪지대 등의 안정이 안된 점성토로 이루어진 연약지반상에 격납고, 철근창고, 유류탱크 등의 단층 구조물을 축조하거나 지반의 침하를 다소 허용할 수 있는 도로나 단지 등의 구조물을 축조하기 위하여, 스크류드릴로 연약지반의 지중을 뚫은 다음, 시멘트 콘크리트에 적정량의 탄성물질(고무가루)과 장,단섬유가 혼합된 연성콘크리트를 상기 스크류드릴의 중공부를 통하여 주입하거나 혹은 망포자루의 내부에 충진시켜 얻어지는 망포자루형 연성 콘크리트 말뚝을 점성토 연약지반에 적정 간격으로 시공 설치하므로써 점성토 연약지반의 복합지반이 조성되어 점성토 연약지반상에 설치하는 시설물의 하중이 고르게 분산 지지될 수 있도록 함을 목적으로 제안 된 것이다.The present invention allows the construction of single-layered structures such as silos, reinforcing warehouses, oil tanks, or the settlement of soils on soft grounds consisting of unstable viscous soils such as dredged soil dumps or coastal, riversides, tidal flats, ponds or swamps. In order to build a structure such as a road or a complex that can be made, drill the ground of the soft ground with a screw drill, and then screw the flexible concrete mixed with an appropriate amount of elastic material (rubber powder) and long and short fibers in cement concrete The complex ground of the viscous clay soft ground is formed by installing and installing the netted clay soft concrete piles at the appropriate intervals through the hollow section of the clay or by filling the inside of the meshed clay. It is proposed for the purpose of allowing the load to be distributed evenly.

도 1 은 본 발명의 점성토 연약지반의 복합지반 조성에 사용되는 스크류드릴의 사시도1 is a perspective view of a screw drill used in the composite ground composition of the soft clay soft ground of the present invention

도 2 는 도 1 의 스크류드릴을 사용하여 연약지반에 연성콘크리트 말뚝을 시공 설치하는 과정의 설명도2 is an explanatory diagram of a process of installing and installing a flexible concrete pile on the soft ground using the screw drill of FIG.

도 3 은 본 발명의 다른 실시예로서, 망포자루를 이용하여 연성콘크리트 말뚝을 시공 설치하는 과정의 설명도3 is another embodiment of the present invention, an explanatory diagram of a process of installing and installing a flexible concrete pile using a mesh cloth bag

도 4 는 본 발명의 연성콘크리트 말뚝의 시공이 완료된 상태의 단면도4 is a cross-sectional view of the completed construction of the flexible concrete pile of the present invention

도 5 는 종래 콘크리트 말뚝의 시공 상태를 보인 단면도5 is a cross-sectional view showing a construction state of a conventional concrete pile

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

1 : 스크류드릴 2 : 외통 3 : 추압날DESCRIPTION OF SYMBOLS 1: Screw drill 2: Outer cylinder 3: Pushing blade

4 : 내통 5 : 상부 스크류플랜지 5a : 하부 스크류플랜지4: inner cylinder 5: upper screw flange 5a: lower screw flange

6 : 비트 7 : 지지부 8 : 중공부6 bit 7 support 8 hollow part

9 : 연약지반 10 : 연성 콘크리트 11 : 연성 콘크리트 말뚝9 Soft ground 10 Soft concrete 11 Soft concrete pile

12 : 탄성물질 13 : 혼합섬유 14 : 시멘트 콘크리트12 elastic material 13 mixed fiber 14 cement concrete

15 : 망포자루 16 : 수직홀 17 : 중량체15: mesh bag 16: vertical hole 17: weight

18 : 주입관 19 : 망포자루형 연성 콘크리트 말뚝 20 : 기반18: injection tube 19: mesh bag type soft concrete pile 20: foundation

21 : 암반21: bedrock

본 발명의 구성을 첨부된 도면에 의해 상세히 설명하면 다음과 같다.The configuration of the present invention will be described in detail with reference to the accompanying drawings.

도 1 은 본 발명의 점성토 연약지반의 복합지반 조성에 사용되는 스크류드릴의 사시도이다.1 is a perspective view of a screw drill used in the composite ground composition of the viscous soil soft ground of the present invention.

본 발명의 점성토 연약지반의 복합지반 조성에 사용되는 스크류드릴(1)은 상부의 외통(2)과 하부의 내통(4)으로 나뉘고, 그 위로 나선형의 상부 스크류플랜지 (5)와 하부 스크류플랜지(5a)를, 나선 방향을 서로 반대방향으로 돌출시켜 설치하되, 하부 스크류플랜지(5a)의 상부에 수개의 추압날(3)을 일정간격으로 입설하여스크류드릴(1)이 회전하면서 하단에 장착되어 있는 비트(6)가 지중을 뚫고 들어감과 동시에 하부 스크류플랜지(5a)에 입설시킨 수개의 추압날(3)이 지중에서 파여 나오는 흙을 상부로 밀어 올리게 되어 지중의 뚫음 작용을 원할하게 하며, 상부로 밀어 올리는 흙은 하부와 반대방향으로 형성된 상부 스크류플랜지(5)로 인하여 측압작용을 받으면서 수직홀의 밖으로 토출되지 않도록 하기 위한 것으로서, 상기 추압날(3)은 하부 스크류플랜지(5a)의 높이와 동일한 격벽형으로 입설한 구조이다.Screw drill (1) used in the composite ground composition of the soft clay soft ground of the present invention is divided into the upper outer cylinder (2) and the lower inner cylinder (4), the upper screw flange (5) and the lower screw flange of the spiral thereon ( 5a) is installed to protrude in the opposite direction to each other in a helical direction, but a plurality of pushing blades (3) are inserted into the upper portion of the lower screw flange (5a) at regular intervals, the screw drill (1) is mounted on the lower At the same time as the bit 6 penetrates the ground, several pushing blades 3, which are placed in the lower screw flange 5a, push up the soil excavated from the ground to the top, thereby making the ground boring action smooth. Soil to be pushed up by the upper screw flange (5) formed in the opposite direction to the lower side is to be discharged out of the vertical hole under the side pressure action, the press blade (3) is the lower screw flange (5a) The structure is installed in the same bulkhead shape as).

도 2 는 상기 도 1 의 스크류드릴을 이용하여 연약지반에 연성콘크리트 말뚝을 시공 설치하는 과정의 설명도이다.FIG. 2 is an explanatory diagram of a process of installing a flexible concrete pile on a soft ground by using the screw drill of FIG. 1.

먼저, 상기 도 1 의 스크류드릴(1)을 이용하여 연약지반(9)의 지중을 소정의 깊이로 뚫고 지지부(7)를 통하여 스크류드릴(1)에서 비트(6)를 밀어낸다.(도2의 A)First, the ground of the soft ground 9 is drilled to a predetermined depth using the screw drill 1 of FIG. 1 and the bit 6 is pushed out of the screw drill 1 through the support 7. A)

이때, 하부 스크류플랜지(5a)와 상부 스크류플랜지(5)가 방향이 서로 반대방향이어서, 스크류드릴(1)의 선단부인 비트(6)가 전진하면서 파내는 흙을 하부 스크류플랜지(5a) 및 하부 스크류플랜지(5a)의 상부에 형성시킨 추압날(3)에 의하여 밀어 올리면서 하부 스크류플랜지(5a)와 역방향의 상부 스크류플랜지(5)에 의하여 지상으로는 토출되지 않는다.At this time, since the lower screw flange (5a) and the upper screw flange (5) are in opposite directions to each other, the soil excavated while the bit (6), which is the front end of the screw drill (1) is advanced, the lower screw flange (5a) and the lower screw It is not discharged to the ground by the lower screw flange 5a and the upper screw flange 5 in the opposite direction while being pushed up by the pushing blade 3 formed on the upper portion of the flange 5a.

그 다음, 스크류드릴(1)을 수직 상향으로 끌어 올리면서 내부의 중공부(8)를 통하여 연성 콘크리트(10)를 쏟아 붓고(도 2 의 B), 스크류드릴(1)을 빼내면 본 발명의 연성 콘크리트 말뚝(11)이 완성되게 된다.(도 2 의 C)Then, while pouring the screw drill (1) vertically upward and pouring the ductile concrete (10) through the hollow portion 8 (in Fig. 2), and withdraw the screw drill (1) of the present invention Soft concrete pile 11 is completed (C of FIG. 2).

여기서, 상기 연성 콘크리트 말뚝(11)의 재료가 되는 연성 콘크리트(10)는 탄성물질(고무가루)(12), 혼합섬유(13) 및 시멘트 콘크리트(14)의 혼합물로써, 그혼합비율은 연약지반(9)의 환경에 따라 달라질 수 있으나, 통상 탄성물질(12) 1-5중량%, 장섬유와 단섬유를 1:1로 혼합한 혼합섬유(13) 5-10중량%, 시멘트 콘크리트(14) 80-90중량%가 바람직하다. 이때, 장섬유와 단섬유를 혼합한 혼합섬유(13)는 연약지반(9)의 상태에 따라 장섬유나 단섬유를 별도로 혼합할 수도 있다.Here, the soft concrete 10, which is a material of the soft concrete pile 11, is a mixture of elastic material (rubber powder) 12, mixed fiber 13, and cement concrete 14, the mixing ratio of which is soft ground Depending on the environment of (9), but usually 1-5% by weight of the elastic material (12), 5-10% by weight of mixed fibers (13) mixed with long fibers and short fibers (13), cement concrete (14 80-90% by weight is preferred. In this case, the mixed fibers 13 in which the long fibers and the short fibers are mixed may be separately mixed with the long fibers or the short fibers according to the state of the soft ground 9.

도 3 은 본 발명의 다른 실시예로서, 망포자루를 이용하여 연성콘크리트 말뚝을 시공 설치하는 과정의 설명도이다.Figure 3 is another embodiment of the present invention, an explanatory view of the process of installing the installation of a flexible concrete pile using a mesh cloth bag.

우선, 도 2 의 A와 같이 스크류드릴(1)을 이용하여 연약지반(9)의 지중에 소정의 깊이로 수직홀(16)을 뚫고, 여기에 두루말이 형태로 감겨져 있는 별도 준비한 망포자루(15)를 넣는데, 상기 망포자루(15)의 내부로 중량체(17)를 내설하여 끝단부를 묶음시켜 상기 수직홀(16)의 깊이 단부까지 끼워 들어가 늘어뜨려진 상태에서 연약지반(9)의 지표면보다 길게 돌설된 상태로 망포자루(15)를 절단한 다음, 콘크리트주입관(18)을 망포자루(15)의 끝단부까지 끼워 넣은 상태에서 별도로 준비한 연성 콘크리트(10)를 통상의 분사장비(도시생략)로서 분사 주입시킨 다음, 콘크리트주입관(18)을 빼내면서 망포자루(15)의 상단부까지 상기의 연성 콘크리트(15)가 채워져 응결(양생)되어 매설됨으로서, 망포자루형 연성 콘크리트 말뚝(19)이 완성되고 본 발명의 시공작업이 완료된다.First, as shown in FIG. 2A, a vertical hole 16 is drilled to a predetermined depth in the ground of the soft ground 9 using a screw drill 1, and a separately prepared mesh cloth 15 having a roll wound therein is formed therein. Into the inside of the mesh bag 15, the weight 17 is insulated into the end of the bundle to end up to the depth end of the vertical hole (16) in the lined-up state longer than the ground surface of the soft ground (9) After cutting the mesh bag 15 in the protruding state, the soft concrete 10 separately prepared in a state where the concrete injection pipe 18 is inserted to the end of the mesh bag 15 is conventionally sprayed (not shown). After injection injection, the soft concrete 15 is filled with condensation (curing) by filling the soft concrete 15 to the upper end of the mesh bag 15 while the concrete injection pipe 18 is removed, thereby the mesh bag type soft concrete pile 19 is Completed and the construction work of the present invention .

도 4 는 본 발명의 연성콘크리트 말뚝의 시공이 완료된 상태의 단면도로서, 상기 도 2 에서 설명한 연성 콘크리트 말뚝(11)과 도 3 에서 설명한 망포자루형 연성 콘크리트 말뚝(19)을 연약지반(9)에 시공설치하되, 종래와 같이 연약지반(9)의저부에 위치하는 암반(21)에 까지 설치하지 않고 연약지반(9)의 일정 깊이까지만 설치하고 상부로 기반(20) 공사를 한 후에, 상기 기반(20) 위로 기초다짐층의 구조물(도시 생략), 배수로, 경계석, 도로(아스팔트) 등을 설치하게 되는 것이다.4 is a cross-sectional view of the completed construction of the flexible concrete pile of the present invention, the soft concrete pile 11 described in FIG. 2 and the mesh cloth type soft concrete pile 19 described in FIG. 3 to the soft ground 9. After installation, but not installed to the rock 21 located at the bottom of the soft ground 9 as before, only to a predetermined depth of the soft ground 9 and after the construction of the base 20 to the top, the base (20) The construction of the foundation compaction layer (not shown), drainage, boundary stone, road (asphalt), etc. will be installed.

즉, 지반 저부의 암반에 걸쳐진 종래의 콘크리트 말뚝이 직접 암반(21)에 수직하중을 가하게 되는데 반하여, 본 발명의 연성 콘크리트 말뚝(11)과 망포자루형 연성 콘크리트 말뚝(19)은 재질이 탄성물질(12)인 고무가루와 혼합섬유(13)인 장,단 섬유가 혼합되어 있고, 설치위치도 연약지반(9)의 일정 깊이에 까지만 설치되어 있는 것이 특징이다.That is, while the conventional concrete piles that extend across the rock bottom of the ground directly apply a vertical load to the rock masses 21, the soft concrete piles 11 and the mesh cloth soft concrete piles 19 of the present invention are made of an elastic material ( 12) is characterized in that the rubber powder and the long and short fibers of the mixed fibers 13 are mixed, and the installation position is also provided only up to a predetermined depth of the soft ground (9).

따라서, 휨응력이나 파열응력에 대해 유연성이 커서 연약지반(9)과 강도면에서 조화를 이루어 복합지반을 조성할 수 있게 되어 지층의 연약부위만 보강하는 이점이 있으며, 기반(20)의 상부로부터의 압력이나 하중을 수직방향뿐 아니라 수평으로도 분산시키므로서 연성 콘크리트 말뚝(11) 및 망포자루형 연성콘크리트 말뚝(19)에 미치는 하중을 전체적으로 유연하게 흡수 분산시킬 수 있고, 연약지반(9) 내부의 상황변화에 의한 연성 콘크리트 말뚝(11) 및 망포자루형 연성콘크리트 말뚝(19)의 파손이나 이로 인한 연약지반(9)의 재침하 현상 등을 미연에 막을 수 있게 되는 것이다.Therefore, the flexibility of the bending stress or the burst stress is large, so that the composite ground can be formed in harmony with the strength of the soft ground 9, which has the advantage of reinforcing only the soft part of the ground layer, and from the top of the base 20 By distributing pressure or load not only in the vertical direction but also horizontally, the load on the soft concrete pile 11 and the mesh bag-type soft concrete pile 19 can be absorbed and distributed as a whole in a flexible manner. It is possible to prevent the breakage of the soft concrete pile (11) and the mesh cloth soft concrete pile (19) due to the change of the situation or the re-settlement of the soft ground (9) caused by this.

이와 같이 본 발명은, 연약지반(9)의 시공장소의 입지조건에 따라 적정간격마다 스크류드릴(1)로 지중을 뚫은 다음, 시멘트 콘크리트(14)에 적정량의 탄성물질(고무가루)(12)과 혼합섬유(13)가 혼합된 연성 콘크리트(10)를 상기 스크류드릴 (1)의 중공부(8)를 통하여 주입하거나, 혹은 지중에 뚫어 설치하는 수직홀(16)의길이 깊이의 하단부까지 망포자루(15)를 늘어뜨러지도록 설치한 다음, 콘크리트주입관(18)에 의하여 상기 연성 콘크리트(10)를 주입하여 응결 양생하므로서 본 발명의 시공 설치를 완료하는 것이다.Thus, according to the present invention, according to the site conditions of the factory of the soft ground (9) perforated the ground with a screw drill (1) at appropriate intervals, and then an appropriate amount of elastic material (rubber powder) 12 to the cement concrete (14) The soft concrete 10 mixed with the mixed fibers 13 is injected through the hollow portion 8 of the screw drill 1, or the mesh cloth to the lower end of the length depth of the vertical hole 16 which is drilled and installed in the ground. After installing the sacks 15 to hang down, by injecting the soft concrete 10 by the concrete injection pipe 18 to condense and cure to complete the installation installation of the present invention.

이와 같은 본 발명은 준설토 투기장의 연약지반이나 해안, 강변, 간석지, 연못 또는 늪지대 등의 안정이 안된 점성토로 이루어진 연약지반상에 격납고, 철근창고, 유류탱크 등의 단층 구조물을 축조하거나 지반의 침하를 다소 허용할 수 있는 도로나 단지 등의 구조물을 축조하기 위하여 제안된 점성토 연약지반의 복합지반 조성을 위한 시공법 및 그 시공물의 구조와 연성 콘크리트 말뚝의 제조방법 및 연성 콘크리트 말뚝에 관한 것으로서,The present invention is to construct a single layer structure such as silo, reinforcing bar, oil tank, or settlement of ground on soft ground composed of unstable viscous soil such as dredged soil dumping ground or coastal, riverside, tidal ground, pond or swamp. The present invention relates to a construction method for constructing a composite ground of a viscous soil soft ground, a structure of the construction, a method of manufacturing flexible concrete piles, and a flexible concrete pile, which are proposed to construct a structure such as a road or a complex, which is tolerable to some extent.

스크류드릴로 연약지반의 지중을 뚫은 다음, 시멘트 콘크리트에 적정량의 탄성물질(고무가루)과 장,단섬유가 혼합된 연성콘크리트를 상기 스크류드릴의 중공부를 통하여 주입하거나 혹은 망포자루의 내부에 충진시켜 얻어지는 망포자루형 연성 콘크리트 말뚝을 점성토 연약지반에 적정 간격으로 시공 설치하므로써 점성토 연약지반의 복합지반이 조성되어 점성토 연약지반상에 설치하는 시설물의 하중이 고르게 분산 지지될 수 있고, 휨응력이나 파열응력에 대해 유연성이 커서 연약지반과 강도면에서 상호 보편적으로 조화를 이루어 복합지반을 조성할 수 있게 되어 실질적으로 지층의 연약부위만을 보강하는 이점이 있어 점성토 연약지반의 복합 기반조성에 있어 시간적, 경제적, 현실적으로 안정성의 효과가 기대된다 하겠다.After drilling the ground of the soft ground with a screw drill, injecting the flexible concrete mixed with an appropriate amount of elastic material (rubber powder) and long and short fibers in the cement concrete through the hollow portion of the screw drill or filling the inside of the mesh cloth By constructing and installing the net cloth pile-type soft concrete piles at the appropriate intervals on the viscous clay soft ground, the complex ground of the viscous clay soft ground is formed, so that the load of the facilities installed on the soft clay soft ground can be evenly distributed and supported by bending stress or rupture stress. It is flexible enough to create a composite ground in harmony with each other in terms of soft ground and strength, which has the advantage of reinforcing only the soft part of the ground layer. The effect of stability is expected.

Claims (10)

스크류드릴(1)로 점성토 연약지반(9)의 지중을 뚫어 콘크리트 말뚝을 시공 설치하는 점성토 연약지반의 복합지반 조성을 위한 시공법에 있어서,In the construction method for the composite ground composition of the viscous soil soft ground to install the concrete pile by drilling the ground of the viscous soil soft ground (9) with a screw drill (1), 상기 스크류드릴(1)로 연약지반(9)의 지중을 뚫은 다음, 시멘트 콘크리트 (14)에 적정량의 탄성물질(고무가루)(12)과 혼합섬유(13)를 혼합한 연성콘크리트 (10)를 상기 스크류드릴(1)의 중공부(8)를 통해 주입하여 얻어지는 연성 콘크리트 말뚝(11), 혹은 망포자루(15)의 내부에 충진시켜 얻어지는 망포자루형 연성 콘크리트 말뚝(19)을 점성토 연약지반(9)에 적정 간격으로 시공 설치하므로써 점성토 연약지반의 복합지반이 조성되어 점성토 연약지반상에 설치하는 시설물의 하중이 고르게 분산 지지될 수 있도록 한 것을 특징으로 한 점성토 연약지반의 복합기반 조성을 위한 시공법After drilling the ground of the soft ground (9) with the screw drill (1), the flexible concrete (10) mixed with an appropriate amount of elastic material (rubber powder) 12 and mixed fibers 13 to the cement concrete (14) The soft concrete pile 11 obtained by injecting through the hollow portion 8 of the screw drill 1, or the mesh cloth soft concrete pile 19 obtained by filling the inside of the mesh bag 15 is made of soft clay ( 9) Construction method for the complex foundation composition of viscous soft ground, characterized in that the complex ground of viscous clay soft ground is formed so that the load of the facilities installed on the viscous clay soft ground can be distributed and supported evenly. 점성토 연약지반(9)의 지중을 뚫어 연성 콘크리트 말뚝(11)을 시공 설치하기 위하여 사용되는 시공물로서 내부에 중공부(8)가 형성되고, 상부 외통(2)과 비트(6)가 착설된 하부 내통(4)으로 형성된 둘레부에 나선형의 상,하부 스크류플랜지(5),(5a)를 서로 반대방향으로 돌출된 통상의 구조에 있어서,A hollow part 8 is formed therein, and the upper outer cylinder 2 and the bit 6 are installed as a construction used to install the soft concrete pile 11 by drilling the ground of the soft clay soft ground 9. In the conventional structure in which the spiral upper and lower screw flanges 5 and 5a protrude in opposite directions to each other at the circumference formed by the lower inner cylinder 4, 하부 스크류플랜지(5a)의 상부에 수개의 추압날(3)을 일정간격으로 입설한 것을 특징으로 한 점성토 연약지반(9)의 복합지반 조성을 위한 스크류드릴Screw drill for the composite ground composition of the viscous soil soft ground (9) characterized in that a number of pushing blades (3) in the predetermined intervals in the upper portion of the lower screw flange (5a) 점성토 연약지반(9)의 지중을 뚫어 시공 설치하기 위한 연성 콘크리트 말뚝(11)을 형성하는 연성 콘크리트(10)는,The soft concrete 10 forming the soft concrete pile 11 for drilling and installing the ground of the viscous soil soft ground 9, 탄성물질(고무가루)(12) 1-5중량%, 장섬유와 단섬유의 1:1 혼합섬유(13) 5-10중량%, 시멘트콘크리트(14) 80-90중량%를 혼합하여 얻을 수 있도록 함을 특징으로 한 점성토 연약지반의 복합지반 조성을 위한 연성 콘크리트 말뚝의 제조방법It can be obtained by mixing 1-5% by weight of elastic material (rubber powder) (12), 5-10% by weight of 1: 1 mixed fiber of long and short fibers (13), and 80-90% by weight of cement concrete (14). Manufacturing method of ductile concrete piles for forming composite ground of soft clay soft ground 점성토 연약지반(9)의 지중을 뚫어 시공 설치하기 위한 망포자루형 연성 콘크리트 말뚝(19)을 형성하는 연성 콘크리트(10)는,Soft concrete (10) forming a mesh bag soft concrete pile (19) for drilling and installing the ground of the viscous soil soft ground (9), 탄성물질(고무가루)(12) 1-5중량%, 장섬유와 단섬유의 1:1 혼합섬유(13) 5-10중량%, 시멘트콘크리트(14) 80-90중량%를 혼합하여 얻을 수 있도록 함을 특징으로 한 점성토 연약지반의 복합지반 조성을 위한 망포자루형 연성 콘크리트 말뚝의 제조방법It can be obtained by mixing 1-5% by weight of elastic material (rubber powder) (12), 5-10% by weight of 1: 1 mixed fiber of long and short fibers (13), and 80-90% by weight of cement concrete (14). Manufacturing method of mesh cloth soft concrete pile for forming composite ground of cohesive soil soft ground 점성토 연약지반(9)의 복합지반을 조성함에 있어서,In forming a composite ground of cohesive soft ground (9), 스크류드릴(1)로 연약지반(9)의 지중을 뚫은 다음, 시멘트 콘크리트 (14)에 적정량의 탄성물질(고무가루)(12)과 혼합섬유(13)를 혼합하여 상기 스크류드릴(1)의 중공부(8)를 통해 주입하여 형성한 것을 특징으로 한 연성 콘크리트 말뚝After drilling the ground of the soft ground (9) with a screw drill (1), the cement concrete (14) is mixed with an appropriate amount of elastic material (rubber powder) (12) and mixed fibers (13) of the screw drill (1) Soft concrete pile, characterized in that formed by injecting through the hollow (8) 제 5 항에 있어서,The method of claim 5, 상기 혼합섬유(13)는 장섬유인 것을 특징으로 한 연성 콘크리트 말뚝The mixed fiber 13 is a soft concrete pile, characterized in that the long fiber 제 5 항에 있어서,The method of claim 5, 상기 혼합섬유(13)는 단섬유인 것을 특징으로 한 연성 콘크리트 말뚝The mixed fiber 13 is a soft concrete pile, characterized in that the short fibers 스크류드릴(1)로 점성토 연약지반(9)의 지중을 뚫어 연성 콘크리트 말뚝(19)을 시공 설치하여 복합지반을 조성함에 있어서,In constructing the composite ground by installing soft concrete piles 19 by drilling the ground of the viscous soil soft ground 9 with a screw drill 1, 상기 스크류드릴(1)로 연약지반(9)의 지중에 뚫어 설치하는 수직홀(16)의 길이 깊이의 하단부까지 망포자루(15)를 늘어뜨러지도록 설치한 다음, 콘크리트주입관(18)에 의하여 시멘트 콘크리트(14)에 적정량의 탄성물질(고무가루)(12)과 혼합섬유(13)를 혼합한 연성콘크리트(10)를 주입하여 형성한 것을 특징으로 하는 망포자루형 연성 콘크리트 말뚝The screw drill 1 is installed so that the mesh bag 15 hangs up to the lower end of the length depth of the vertical hole 16 installed in the ground of the soft ground 9 by the concrete injection pipe 18. Mesh bag type soft concrete pile, characterized in that the cement concrete 14 is formed by injecting a flexible concrete (10) mixed with an appropriate amount of elastic material (rubber powder) 12 and mixed fibers 13 제 8 항에 있어서,The method of claim 8, 상기 혼합섬유(13)는 장섬유인 것을 특징으로 한 망포자루형 연성 콘크리트말뚝The mixed fiber 13 is a mesh cloth bag type soft concrete pile, characterized in that the long fiber 제 8 항에 있어서,The method of claim 8, 상기 혼합섬유(13)는 단섬유인 것을 특징으로 한 망포자루형 연성 콘크리트 말뚝The mixed fiber 13 is a mesh bag type soft concrete pile, characterized in that the short fibers.
KR1020010034812A 2001-06-19 2001-06-19 Construction method of a composite ground using controlled modulus columns for the improvement of compressible soils KR20010079163A (en)

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