WO2022255545A1 - Construction method for improving soft ground, which can prevent contamination caused by loose soil - Google Patents

Construction method for improving soft ground, which can prevent contamination caused by loose soil Download PDF

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Publication number
WO2022255545A1
WO2022255545A1 PCT/KR2021/012580 KR2021012580W WO2022255545A1 WO 2022255545 A1 WO2022255545 A1 WO 2022255545A1 KR 2021012580 W KR2021012580 W KR 2021012580W WO 2022255545 A1 WO2022255545 A1 WO 2022255545A1
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WO
WIPO (PCT)
Prior art keywords
stirring rod
soft ground
stirring
soil
net
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PCT/KR2021/012580
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French (fr)
Korean (ko)
Inventor
김준수
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에코엔텍 주식회사
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Publication of WO2022255545A1 publication Critical patent/WO2022255545A1/en

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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K17/00—Soil-conditioning materials or soil-stabilising materials
    • C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
    • C09K17/42—Inorganic compounds mixed with organic active ingredients, e.g. accelerators
    • C09K17/44—Inorganic compounds mixed with organic active ingredients, e.g. accelerators the inorganic compound being cement
    • 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
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/44—Thickening, gelling or viscosity increasing agents
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use

Definitions

  • a floating soil dustproof net is disposed in a form surrounding the stirring rod along the length of the stirring rod to prevent contamination by floating soil, which can prevent the spreading of the floating soil generated when excavating soft ground through the stirring rod. It is about a soft ground improvement method that can prevent it.
  • soft ground composed of soft clay, silt, or unique soil, such as coastal wetlands, rivers, lakes, and harbor reclamation or dredged landfills, has a high water content and low uniaxial compressive strength, so when constructing a structure on top, it is stable and Because it causes problems with settlement, the engineering properties of the ground must be improved in various ways.
  • a deep mixing treatment method has been mainly used to improve the soft cohesive soil ground to a columnar or bulky form by injecting and mixing cement-based powder or suspension chemical stabilizers into the ground in situ.
  • Deep Cement Mixing is a technology for improving soft ground by chemically solidifying it by mixing a stabilizer (solidifying agent, hardener) with lime, cement, etc. as the main raw material and soft ground in the ground, especially , It is a method of strengthening soft ground by forming a physically and chemically solidified geological structure by activating the production of ettringite through the hydration reaction or Pozzolan reaction that occurs when the soil and stabilizer of the soft ground are mixed.
  • a stabilizer solidifying agent, hardener
  • This deep mixing method can be largely divided into a penetration injection method and a draw injection method, and the penetration injection method includes a step of penetrating the auger casing having an injection passage into the ground so that the stabilizer can be injected downward, and the auger casing It consists of a process of mixing with soft ground while injecting a stabilizer at the same time as penetrating by rotation, and a process of mixing the soft ground and stabilizer at the same time while rotating the auger casing penetrating to the design depth and drawing it upward.
  • the pull-out jet type includes a process of penetrating the auger casing formed with an injection passage into the ground so that the stabilizer can be injected downward, a process of rotating the auger casing penetrated to the design depth and drawing it upward, and the auger casing It consists of a process of mixing with soft ground while injecting a stabilizer at the same time as drawing out.
  • the soft ground improvement method according to the prior art is a very useful technique for improving soft ground, but there is a problem that environmental pollution (marine pollution, land pollution, etc.) is accompanied.
  • floating soil is generated when the seabed is pierced and agitated with an agitator for ground improvement. Due to this floating soil, nearby farms are contaminated, and in particular, fish farms such as seaweed are seriously damaged.
  • the solidified material flows into the permeable layer and the contaminant spreads, and the ground agitation effect is significantly reduced because the bulb is not formed, and the cement system used in the soft ground improvement method Grout material and soil of soft ground contaminate the surrounding soil and groundwater according to excavation and ground agitation.
  • the floating soil generated during the soft ground improvement work is a mixture of the soil at the site where the excavation is performed and a stabilizer, etc., and it hardens over time, so there is an urgent need for a plan to prevent the spread of the floating soil.
  • the present invention was invented to solve the above problems, and it is possible to improve work efficiency by minimizing the generation of floating soil during soft ground reinforcement work, and to prevent environmental pollution by preventing the diffusion of the generated floating soil. Its purpose is to provide a ground improvement method.
  • the present invention penetrates the stirring rod provided with stirring blades into the ground to the design depth, then rotates the stirring rod to draw it upward, and at the same time inject the injection material to mix with the excavated soft ground
  • the bottom surface formed openly, the front netting, the rear netting, the left face netting, the right face netting, and the upper surface formed open by a predetermined area so that the stirring rod is inserted through the center.
  • stopper supports having both ends fixed to the left and right side nets are installed in a form crossing the central part where the upper net is opened, and the upper surface on one side of the outer circumferential surface of the stirring rod is the bottom surface of the stopper support
  • a ring-shaped stopper that is caught on the stopper is fitted so that the stirring blades provided on the stirring rod by the stopper support are spaced apart from the upper surface network at a predetermined interval, so that the upper surface due to contact between the stirring blade and the upper surface network during operation of the stirring rod It is possible to prevent damage to the net, and when the stirring rod is pulled upward, the stopper is supported by the stopper support so that the floating soil dustproof net can be smoothly moved upward along the stirring rod.
  • the present invention is arranged in the lower part of the stirring blade, but the cylindrical coupling part coupled in a form surrounding the outer circumferential surface of the stirring rod so that the stirring rod is rotatable, and the It is characterized in that the solidified soil separator including a blade extending along the horizontal direction from the side of the coupling part is provided to separate the viscous solidified soil adhering to the outer circumferential surface of the stirring blade or rod.
  • the injection material is composed of mixing 70 to 120 parts by weight of cement or solidifying material with respect to 100 parts by weight of water, and 0.1 to 8 parts by weight of a viscosity enhancer is further added to 100 parts by weight of the injection material.
  • the floating soil dustproof net is disposed in a form surrounding the stirring rod along the longitudinal direction of the stirring rod, preventing the floating soil generated during excavation of soft ground through the stirring rod from spreading to the outside of the floating soil dustproof net. can do.
  • the stirring rod is spaced apart from the upper surface network by a stopper and the stopper support at a predetermined interval, so that mutual damage due to contact with the upper surface network during the stirring rod operation can be prevented, and the stirring rod is pulled upward
  • the stopper is supported on the stopper support, the net main body can be smoothly moved upward without affecting the operation of the stirring rod.
  • the present invention separates the viscous solidified soil that adheres to the outer circumferential surface of the stirring blade or stirring rod formed in the process of stirring the soft soil and the injection material of the soft ground through the blade of the solidified soil separator disposed below the stirring blade. Through this, it is possible to prevent a problem in which the mixing efficiency of the soft soil and the injection material is lowered.
  • the injection material to which the viscosity enhancer is added according to the embodiment of the present invention has excellent water inseparability, so that cement or heavy metals do not elute even in an environment in contact with groundwater or seawater, so there is no environmental pollution problem.
  • the external pressure is released, so the fluidity is lost and the problem of the injection material losing cracks or cavities in the ground is solved, so supplements such as secondary injection can be omitted.
  • it has excellent durability and shortens the construction period by securing early strength and long-term strength safety boots.
  • FIG. 1 is an exemplary view schematically showing a state in which floating soil and sludge are generated in an excavation process through a stirring rod.
  • FIGS. 2 to 4 are schematic exemplary views for explaining a floating soil dustproof network according to an embodiment of the present invention.
  • 5 and 6 are schematic examples for explaining a stopper and a stopper support provided in a floating soil dustproof net according to an embodiment of the present invention.
  • FIG. 7 is a photograph of a state in which solidified soil is adhered to the outer circumferential surfaces of the stirring blades and the stirring rod according to the prior art.
  • FIGS. 8 to 10 are schematic illustrations for explaining a solidified soil separator according to an embodiment of the present invention.
  • the present invention is a soft ground improvement for reinforcing the soft ground by injecting the stirring rod provided with stirring blades into the ground to the design depth, then rotating the stirring rod to draw it upward, and injecting the injection material to mix with the excavated soft ground. It relates to a construction method, and is characterized in that it is possible to prevent the floating soil generated during excavation of soft ground through the stirring rod from spreading to the outside of the floating soil dustproof net.
  • the present invention includes a floating soil dustproof net 100 disposed in a form surrounding the stirring rod.
  • FIGS. 2 to 4 are schematic exemplary views for explaining a floating soil dustproof net according to an embodiment of the present invention.
  • the floating soil dustproof net 100 includes a net body 110 disposed in a form surrounding the stirring rod along the longitudinal direction of the stirring rod, and the net main body is lifted by buoyancy. It includes a weight body 120 provided on one side of the net main body to prevent it.
  • the net body 110 is disposed in a form substantially surrounding a predetermined area of the stirring rod along the longitudinal direction of the stirring rod 10 .
  • the net body 110 has a front net 111, a rear net 112, and a left face net so that the net body 110 blocks the side surface and the upper surface of the stirring rod 10. It may be formed in the form of a hexahedron composed of (113), right face network 114, and upper face network 115.
  • the network body 110 is formed with a sufficient width and length so that interference due to contact with the stirring blades does not occur during the operation of the stirring rod.
  • the net main body 110 can allow the stirring rod to be easily penetrated and drawn out, and the bottom surface is open so that the floating soil can be easily introduced into the net main body 110 during ground improvement, and the upper net (115) has a central portion opened by a predetermined area so that the stirring rod 10 is inserted therethrough.
  • the central portion of the upper surface network 115 may be open in a square or rectangular shape.
  • the stirring rod 10 is inserted through the open central portion of the upper surface network 115 and is connected to the network body 110 via a stopper and a stopper support to be described later.
  • the net main body 110 is provided with a net frame 117 in the form of a hexahedron constituting a basic skeleton, and the front, rear, left, right and top surfaces of the net frame 117
  • the front mesh 111, the rear mesh 112, the left face mesh 113, the right face mesh 114, and the upper face mesh 115 may be combined along.
  • the materials of the front net 111, the rear net 112, the left net 113, the right net 114, and the upper net 115 are not limited to the scope of the present invention, for example, floating It may be formed of any one of fibers, plastics, steel, or equivalents to effectively block the loss of toe, or a mesh made of steel is integrally formed between the first sheet made of fiber and the second sheet made of plastic. It may be made in an inserted form.
  • the floating soil dustproof net 100 includes a weight body 120 to prevent the net body from floating and floating due to buoyancy.
  • the weight body 120 is filled with one or more selected from gas (air), liquid, or solid having a specific gravity smaller than water, and is provided in plurality to minimize the movement of the floating soil dustproof net 100. It can be.
  • the weight body 120 may be coupled to the lower end of each corner inside the net body 110 as shown in FIG. 4, and the weight prevents the net body from floating or floating due to buoyancy.
  • the floating soil dustproof net 100 according to the present invention as described above is installed in a form surrounding the stirring rod on land and then descends to the design depth along the stirring rod 10.
  • the floating soil dustproof net 100 which has descended to the design depth, is supported by the weight body 120, and the front net 111, the rear net 112, the left side net 113 by the net frame 117,
  • the right face net 114 and the upper face net 115 are disposed in a form that surrounds the side surface and the top surface of the stirring rod without disturbing the shape.
  • the stopper support 130 both ends of which are fixed to the left and right side nets, is installed in the form of crossing the open center of the upper net 115, and on one side of the outer circumferential surface of the stirring rod A ring-shaped stopper 140 whose upper surface is caught on the lower surface of the stopper support is fitted.
  • the stopper support 130 may be disposed in a form in which a pair of circular pipes (or round bars) having a predetermined diameter are in close contact with both sides of the outer circumferential surface of the stirring rod 10, as shown in FIG. 5, or a rectangular shape as shown in FIG. It may be made of a plate-like body. If the stopper support 130 is made of a rectangular plate-shaped body, the stopper support may have a predetermined thickness, and a separate bearing B may be mounted at the center thereof to apply rotation of the stirring rod 10.
  • the stirring rods 10 are arranged in the form of 1x4 or 2x2.
  • the stopper supports 130 may be provided in one row or two rows according to the arrangement of the stirring rods 10 .
  • the stirring rods 10 are arranged in a 2x2 shape, and a pair of stopper supports 130 are arranged at a predetermined interval in the center of the upper network 115. It is shown , This is only an example to aid understanding of the present invention and is not limited to the scope of the present invention.
  • each stirring rod 10 installed through the central portion of the upper surface network 115 are disposed at a sufficient distance from adjacent stirring rods. This is to prevent the stirring blades provided on the outer circumferential surface of each stirring rod from coming into contact with the stirring blades of adjacent stirring rods. Therefore, when the stirring rods 10 are arranged in a 2x2 shape, each stirring rod 10 may be arranged at each corner of the open central portion of the upper surface network 115 as shown in FIG. 2 .
  • the stirring blades 11 provided on the stirring rod by the stopper support 130 are spaced apart from the upper surface network 115 at a predetermined interval, so that when the stirring rod rotates, direct contact between the stirring blades and the upper surface network occurs. Mutual damage can be prevented, and through this, the spread of floating soil can be prevented in advance, and when the stirring rod 10 is pulled upward, the stopper 140 is supported by the stopper support 130 and the floating soil dustproof net ( 100) can be smoothly moved upward along the stirring rod 10.
  • the present invention includes a solidified soil separator 200 capable of separating the viscous solidified soil adhering to the outer circumferential surface of the stirring blade or the stirring rod.
  • the solidified soil separator 200 to solve this problem is a cylindrical coupling part disposed below the stirring blade and coupled in a form surrounding the outer circumferential surface of the stirring rod 10 so that the stirring rod can rotate. 210 and a blade 220 extending from the side of the coupling part.
  • the blades include a first blade 220 extending in a horizontal direction from the side of the coupling part as shown in FIG. 9, and a second blade disposed vertically from the outer end of the upper end of the first blade 220 ( 220′).
  • the soft soil mixed with the injection material has a slimy mud shape, and when the stirring rod and the stirring blade rotate, they are attached to the stirring blade and the stirring rod to gradually form a large pot-shaped mud ball, which overloads the power unit. In addition, it interferes with the smooth rotation of the stirring rod.
  • the first blade 220 and the second blade 220′ are not influenced by the stirring rod and in a fixed state, when the stirring rod rotates, the mud balls on the outer circumferential surface of the stirring blade or the stirring rod are separated from the first blade 220. It can be gradually removed while being in continuous contact with the two blades (220'), and through this, it is possible to prevent a problem of deterioration in stirring efficiency.
  • the solidified soil separator 200′′ may be installed in the form of connecting a pair of stirring rods arranged in parallel in the horizontal direction as shown in FIG.
  • the coupling part and the first blade are disposed at the top and bottom of the agitation blade 11 on one side, respectively, and the second blade (220′′) connects the first blade at the top and the first blade at the bottom. ) can be placed.
  • the injection material is prepared by mixing water with powder made of cement or solidifying material.
  • any one or a mixture of two or more of Portland cement, slag cement, pozzolan cement, or ultra-fine cement obtained by pulverizing these cements is used.
  • the solidifying material may be any one or a mixture of two or more of bituminous coal fly ash powder, anthracite fly ash powder, slag powder, natural pozzolan powder, limestone powder, silica fume, siliceous mineral powder, and bentonite.
  • bituminous coal fly ash powder anthracite fly ash powder
  • slag powder natural pozzolan powder
  • limestone powder silica fume, siliceous mineral powder, and bentonite.
  • calcium salt powder or sulfate powder may be included as the high-strength solidifying agent.
  • the cement-based component reacts with water to cause a hydration reaction to produce hydrates such as calcium silicate hydrate (CSH) and calcium hydroxide (Ca(OH) 2 ).
  • CSH calcium silicate hydrate
  • Ca(OH) 2 calcium hydroxide
  • the pozzolanic solidifying material reduces the specific gravity of the grout, enabling the filling and reinforcement of large-volume cavities with the same weight, and has the effect of reducing the bleeding of the grout in the unhardened state, and the chemical resistance of the hardened grout in the hardened state. It has the effect of improving durability and increasing long-term strength.
  • the added amount of the calcium salt or sulfate-based early-hardening material increases in proportion to the higher the water content ratio of the cement milk.
  • Ettringite In the process of forming calcium silicate hydrate (3CaO Al2O3 3CaSO4 3H2O) called Ettringite, it combines a large amount of water in cement milk to reduce free water in cement milk grout. This not only suppresses the bleeding of the cement milk injection material, but also has the effect of enhancing strength development and durability during curing.
  • the fluidity of cement milk must be increased to secure the filling of the powder of the above configuration. Therefore, in the present invention, when mixing the powder and water to produce cement milk, 70 to 120 parts by weight of cement or solidifying material is mixed with respect to 100 parts by weight of water.
  • cement milk behaves in a fluid state in which cement particles are homogeneously distributed in water in the presence of an external force such as stirring or pressurization.
  • an external force such as stirring or pressurization.
  • a large amount of bleeding water occurs due to the separation of phosphorus powder particles or the part occupied by water exists as a void for a long time, greatly reducing the ground reinforcement and water barrier effect.
  • it flows through the gaps or gaps and greatly reduces the ground reinforcement or water order effect.
  • the injection material is finally prepared by adding a viscosity enhancing agent to cement milk in which cement or a solidifying material and water are mixed.
  • a viscosity enhancing agent Preferably, 0.1 to 8 parts by weight of a viscosity enhancing agent is added based on 100 parts by weight of the injection material, and all of the above problems can be solved by the addition of such a viscosity enhancing agent.
  • the viscosity enhancing agent is an aqueous dispersion of one or more mixtures selected from the group consisting of thickeners such as starch, methylcellulose, polyalkylene oxide, and gum arabic to increase the viscosity of a liquid in an alkaline environment. It is an aqueous solution dissolved in acrylic polymer.
  • the fluidity of the injection material required for the work is sufficiently secured, but when the external force is removed after filling, the fluidity is instantly lost and plasticity is exhibited, so that loss through cracks in the ground does not occur.
  • a plastic injection material loses fluidity due to an increase in viscosity and can maintain its shape at the time of injection in a natural state where external force does not exist.
  • injection pressure When injection pressure) is applied, it shows fluidity again, so it can fill the voids.
  • the external force is removed after filling the voids (when the injection pressure disappears as the injection of the injection material is completed), the fluidity disappears again, so the behavior of a typical plastic body is exhibited.
  • the reaction principle that produces the above effect when adding a viscosity enhancing agent is that the viscosity enhancing agent is rapidly activated in an alkaline environment to form a long chain polymer structure.
  • the viscosity enhancing agent is activated in a long chain shape and serves to bind cement, solidifying material and soil into one lump, and thickeners such as starch, methylcellulose, polyalkylene oxide, and gum arabic increase the viscosity of the liquid. because it makes Accordingly, the fluidity of each individual particle is lowered and the viscosity is increased, and heavy metals present in cement or solidifying material are not eluted into water.
  • stirring rod 11 stirring blade
  • stopper support 131 support connector

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Abstract

The present invention provides a construction method for improving a soft ground, which can prevent contamination caused by loose soil, wherein a loose soil dust-proof net is disposed to surround an agitating rod in the lengthwise direction of the agitating rod, so that loose soil produced at the time of excavation of a soft ground by means of the agitating rod can be prevented from diffusing to the outside of the loose soil dust-proof net.

Description

부상토에 의한 오염을 방지할 수 있는 연약지반개량공법Soft ground improvement method that can prevent contamination by floating soil
본 발명은 교반로드의 길이방향을 따라 교반로드를 감싸는 형태로 부상토 방진망이 배치되어, 교반로드를 통한 연약지반 굴착시 발생하는 부상토가 확산되는 것을 방지할 수 있도록 한 부상토에 의한 오염을 방지할 수 있는 연약지반개량공법에 관한 것이다.In the present invention, a floating soil dustproof net is disposed in a form surrounding the stirring rod along the length of the stirring rod to prevent contamination by floating soil, which can prevent the spreading of the floating soil generated when excavating soft ground through the stirring rod. It is about a soft ground improvement method that can prevent it.
일반적으로 해안습지나 하천, 호수, 항만 등의 간척 또는 준설매립지와 같은 연약한 점토나 실트질 또는 고유기질토로 이루어져 있는 연약지반은 고함수비이고, 일축압축강도가 작아서 상부에 구조물을 시공할 경우 안정과 침하에 문제를 일으키기 때문에 다양한 방법으로 지반의 공학적인 성질을 개선시켜야만 한다.In general, soft ground composed of soft clay, silt, or unique soil, such as coastal wetlands, rivers, lakes, and harbor reclamation or dredged landfills, has a high water content and low uniaxial compressive strength, so when constructing a structure on top, it is stable and Because it causes problems with settlement, the engineering properties of the ground must be improved in various ways.
연약지반 개량시 대규모 연약지반에서는 연직 배수재를 이용한 샌드 드레인 공법, 또는 페이퍼 드레인 공법 등이 주로 이용되어 왔는데, 이러한 공법은 시공기간이 장시간 소요되며, 시공후 안정성 확보가 용이하지 못하고 깊은 심도의 연약지반에는 적용하기 곤란하다는 문제점이 있다.In the case of soft ground improvement, the sand drain method using a vertical drain or the paper drain method has been mainly used in large-scale soft ground. These methods require a long construction period, and it is not easy to secure stability after construction has a problem that it is difficult to apply.
이러한 문제점을 개선하기 위해 1990년대부터 시멘트를 주로한 분말상태 또는 현탁액상태의 화학적 안정재를 원위치 지반에 투입 혼합하여 연약점성토 지반을 주상 또는 괴상으로 전면적으로 개량하는 심층혼합처리공법이 주로 이용되고 있다.In order to improve these problems, since the 1990s, a deep mixing treatment method has been mainly used to improve the soft cohesive soil ground to a columnar or bulky form by injecting and mixing cement-based powder or suspension chemical stabilizers into the ground in situ.
심층혼합공법(Deep Cement Mixing, DCM)이라 함은 석회, 시멘트 등을 주원료로 하는 안정제(고화제, 경화제)와 지중의 연약지반을 혼합하여 화학적으로 고체화시켜 연약지반을 개량하기 위한 기술로서, 특히, 연약지반의 토양과 안정제가 혼합되면서 발생하는 수화반응 또는 포졸란(Pozzolan) 반응을 통해서 에트린자이트의 생성을 활성화하여 물리적, 화학적으로 고형화된 지중구조체를 형성함으로써 연약지반을 강화시키는 공법이다. 이러한, 심층혼합공법은 크게 관입 분출식과 인발 분출식으로 구분될 수 있으며, 관입분출식은 하부방향으로 안정제가 분사될 수 있도록 분사통로를 형성한 오거 케이싱을 지중에 관입하는 공정과, 상기 오거 케이싱의 회전으로 관입과 동시에 안정제를 주입하면서 연약지반과 혼합하는 공정과, 설계 심도까지 관입한 오거 케이싱을 회전시켜 상부방향으로 인발하면서 동시에 연약지반과 안정제를 혼합하는 공정으로 이루어진다. 반면에 인발 분출식은 하부방향으로 안정제가 분사될 수 있도록 분사통로를 형성한 오거 케이싱을 지중에 관입하는 공정과, 설계 심도까지 관입한 오거 케이싱을 회전시켜 상부방향으로 인발하는 공정과, 상기 오거 케이싱의 인발과 동시에 안정제를 주입하면서 연약지반과 혼합하는 공정으로 이루어진다.Deep Cement Mixing (DCM) is a technology for improving soft ground by chemically solidifying it by mixing a stabilizer (solidifying agent, hardener) with lime, cement, etc. as the main raw material and soft ground in the ground, especially , It is a method of strengthening soft ground by forming a physically and chemically solidified geological structure by activating the production of ettringite through the hydration reaction or Pozzolan reaction that occurs when the soil and stabilizer of the soft ground are mixed. This deep mixing method can be largely divided into a penetration injection method and a draw injection method, and the penetration injection method includes a step of penetrating the auger casing having an injection passage into the ground so that the stabilizer can be injected downward, and the auger casing It consists of a process of mixing with soft ground while injecting a stabilizer at the same time as penetrating by rotation, and a process of mixing the soft ground and stabilizer at the same time while rotating the auger casing penetrating to the design depth and drawing it upward. On the other hand, the pull-out jet type includes a process of penetrating the auger casing formed with an injection passage into the ground so that the stabilizer can be injected downward, a process of rotating the auger casing penetrated to the design depth and drawing it upward, and the auger casing It consists of a process of mixing with soft ground while injecting a stabilizer at the same time as drawing out.
한편, 종래 기술에 따른 연약지반개량공법은 연약지반의 개량을 위한 매우 유용한 기술이나 환경오염(해상 오염, 육상 오염 등)이 수반된다는 문제점이 있었다.On the other hand, the soft ground improvement method according to the prior art is a very useful technique for improving soft ground, but there is a problem that environmental pollution (marine pollution, land pollution, etc.) is accompanied.
일 예로써, 지반 개량을 위해 교반기로 해저면을 천공 교반시 부상토가 발생하게 되는데, 이러한 부상토로 인해 인근 양식장 등이 오염되고, 특히 어류나 김 등 양식장에 큰 피해가 발생하였다. As an example, floating soil is generated when the seabed is pierced and agitated with an agitator for ground improvement. Due to this floating soil, nearby farms are contaminated, and in particular, fish farms such as seaweed are seriously damaged.
또한, 연약지반 사이에 투수층이 존재하는 경우 투수층으로 고화재가 유출되어 오염물질의 확산이 일어나게 되고, 또한 구근이 형성되지 않아 지반 교반효과가 현저히 떨어지는 문제점이 있었으며, 연약지반개량공법에서 사용되는 시멘트계 그라우트재와 연약지반의 토사가 굴착과 지반 교반에 따라 주변의 토양 및 지하수를 오염시키게 된다.In addition, when there is a permeable layer between the soft ground, the solidified material flows into the permeable layer and the contaminant spreads, and the ground agitation effect is significantly reduced because the bulb is not formed, and the cement system used in the soft ground improvement method Grout material and soil of soft ground contaminate the surrounding soil and groundwater according to excavation and ground agitation.
또한, 연약지반 개량작업시 발생하는 부상토는 굴착이 이루어지는 현장의 토양과 안정제 등이 혼합되어 있는 것으로서 시간이 경과하면 경화하게 되므로 부상토의 확산을 방지할 수 있는 방안이 절실히 요구되고 있는 실정이다.In addition, the floating soil generated during the soft ground improvement work is a mixture of the soil at the site where the excavation is performed and a stabilizer, etc., and it hardens over time, so there is an urgent need for a plan to prevent the spread of the floating soil.
본 발명은 상기와 같은 문제점을 해결하기 위하여 발명된 것으로, 연약지반의 보강 공사시 부상토의 발생을 최소화하여 작업효율성을 향상시킬 수 있으며, 발생한 부상토의 확산을 방지하여 환경오염을 방지할 수 있는 연약지반개량공법을 제공하는데 그 목적이 있다.The present invention was invented to solve the above problems, and it is possible to improve work efficiency by minimizing the generation of floating soil during soft ground reinforcement work, and to prevent environmental pollution by preventing the diffusion of the generated floating soil. Its purpose is to provide a ground improvement method.
상기와 같은 문제점을 해결하기 위하여 본 발명은 교반날개가 마련되는 교반로드를 설계심도까지 지중에 관입한 다음 상기 교반로드를 회전시켜 상부방향으로 인발하는 동시에 주입재를 주입하여 굴착된 연약지반과 혼합하여 연약지반을 보강하는 연약지반개량공법에 있어서, 개방형성되는 바닥면과, 전면망과, 후면망과, 좌측면망과, 우측면망 및 상기 교반로드가 관통삽입되도록 중앙부가 소정면적만큼 개방형성되는 상면망으로 이루어지는 육면체 형태로서 상기 교반로드의 길이방향을 따라 교반로드를 감싸는 형태로 배치되는 망 본체와, 상기 망 본체가 부력에 의해 부상하는 것을 방지할 수 있도록 상기 망 본체의 일측에 마련되는 중량체를 포함하며, 상기 교반로드의 측면과 상면을 차단하는 형태로 배치되어 교반로드의 회전시 발생하는 부상토의 확산을 방지하는 부상토 방진망;을 포함하는 것을 특징으로 한다. In order to solve the above problems, the present invention penetrates the stirring rod provided with stirring blades into the ground to the design depth, then rotates the stirring rod to draw it upward, and at the same time inject the injection material to mix with the excavated soft ground In the soft ground improvement method for reinforcing soft ground, the bottom surface formed openly, the front netting, the rear netting, the left face netting, the right face netting, and the upper surface formed open by a predetermined area so that the stirring rod is inserted through the center. A net body in the form of a hexahedron made of nets and disposed to surround the stirring rod along the longitudinal direction of the stirring rod, and a weight body provided on one side of the net body to prevent the net body from floating due to buoyancy. It is characterized in that it includes; a floating soil dustproof net that is disposed in a form blocking the side surface and upper surface of the stirring rod to prevent the diffusion of floating soil generated when the stirring rod rotates.
또한, 본 발명은 양측 단부가 각각 좌측면망 및 우측면망에 고정되는 스토퍼 지지대가 상기 상면망의 개방형성되는 중앙부를 가로지르는 형태로 설치되고, 상기 교반로드의 외주면 일측에는 상면이 상기 스토퍼 지지대의 저면에 걸림되는 링 형의 스토퍼가 끼움결합되어, 상기 스토퍼 지지대에 의해 교반로드에 마련되는 교반날개가 상면망과 소정간격을 두고 이격배치되도록 하여 교반로드 동작시 교반날개와 상면망 간의 접촉에 의한 상면망의 훼손을 방지할 수 있고, 상기 교반로드가 상부로 인발될 때 스토퍼가 스토퍼 지지대에 지지되어 교반로드를 따라 부상토 방진망이 원활하게 상부로 이동 가능하도록 한 것을 특징으로 한다. In addition, in the present invention, stopper supports having both ends fixed to the left and right side nets are installed in a form crossing the central part where the upper net is opened, and the upper surface on one side of the outer circumferential surface of the stirring rod is the bottom surface of the stopper support A ring-shaped stopper that is caught on the stopper is fitted so that the stirring blades provided on the stirring rod by the stopper support are spaced apart from the upper surface network at a predetermined interval, so that the upper surface due to contact between the stirring blade and the upper surface network during operation of the stirring rod It is possible to prevent damage to the net, and when the stirring rod is pulled upward, the stopper is supported by the stopper support so that the floating soil dustproof net can be smoothly moved upward along the stirring rod.
또한, 본 발명은 상기 교반날개의 하부에 배치되되 상기 교반로드가 회전 가능하도록 교반로드의 외주면을 감싸는 형태로 결합되는 원통형의 결합부와, 연악지반의 연약토와 주입재의 교반 과정에서 형성되는 상기 교반날개 또는 로드의 외주면에 달라 붙는 점성의 고화토가 분리되도록 상기 결합부의 측방으로부터 수평방향을 따라 연장형성되는 블레이드를 포함하는 고화토 분리기가 마련되는 것을 특징으로 한다. In addition, the present invention is arranged in the lower part of the stirring blade, but the cylindrical coupling part coupled in a form surrounding the outer circumferential surface of the stirring rod so that the stirring rod is rotatable, and the It is characterized in that the solidified soil separator including a blade extending along the horizontal direction from the side of the coupling part is provided to separate the viscous solidified soil adhering to the outer circumferential surface of the stirring blade or rod.
또한, 본 발명에서 상기 주입재는 물 100중량부에 대하여 시멘트 또는 고화재 70~120중량부를 혼합하여 조성되며, 상기 주입재 100중량부에 대하여 점도증진제 0.1~8중량부가 더 첨가되는 것을 특징으로 한다.In the present invention, the injection material is composed of mixing 70 to 120 parts by weight of cement or solidifying material with respect to 100 parts by weight of water, and 0.1 to 8 parts by weight of a viscosity enhancer is further added to 100 parts by weight of the injection material.
상기와 같이 이루어지는 본 발명은 부상토 방진망이 교반로드의 길이방향을따라 교반로드를 감싸는 형태로 배치되어, 교반로드를 통한 연약지반 굴착시 발생하는 부상토가 부상토 방진망의 외측으로 확산되는 것을 방지할 수 있다. In the present invention made as described above, the floating soil dustproof net is disposed in a form surrounding the stirring rod along the longitudinal direction of the stirring rod, preventing the floating soil generated during excavation of soft ground through the stirring rod from spreading to the outside of the floating soil dustproof net. can do.
이와 같이 부상토의 확산이 방지되면 수중의 탁도가 원래대로 유지될 뿐만 아니라, 주입재의 화학적 성분확산이 최소화됨으로 수중 환경의 오염을 방지할 수 있다. 더불어, 주입재 성분이 해양 생물에 영향을 미치는 영향이 극히 적기 때문에 주변 양식장의 피해를 최소화할 수 있고, 또한 해수 오염을 방지하기 위한 별도의 물혼탁 방지막 또한 생략할 수 있다. In this way, if the diffusion of floating soil is prevented, not only the turbidity of the water is maintained as it is, but also the contamination of the aquatic environment can be prevented by minimizing the diffusion of chemical components of the injection material. In addition, since the injection material component has very little effect on marine life, damage to the surrounding farms can be minimized, and a separate water turbidity prevention film to prevent seawater contamination can also be omitted.
또한, 본 발명은 스토퍼 및 스토퍼 지지대에 의해 교반로드가 상면망과 소정간격을 두고 이격배치되어 교반로드 동작시 상면망과의 접촉에 의한 상호 훼손을 방지할 수 있고, 상기 교반로드가 상부로 인발될 때 스토퍼가 스토퍼 지지대에 지지되면서 교반로드의 동작에 영향을 미치지 않으면서 망 본체를 원활하게 상측으로 이동시킬 수 있다. In addition, in the present invention, the stirring rod is spaced apart from the upper surface network by a stopper and the stopper support at a predetermined interval, so that mutual damage due to contact with the upper surface network during the stirring rod operation can be prevented, and the stirring rod is pulled upward When the stopper is supported on the stopper support, the net main body can be smoothly moved upward without affecting the operation of the stirring rod.
또한, 본 발명은 상기 교반날개의 하부에 배치되는 고화토 분리기의 블레이드를 통해 연악지반의 연약토와 주입재의 교반 과정에서 형성되는 상기 교반날개 또는 교반로드의 외주면에 달라 붙는 점성의 고화토를 분리시킬 수 있으며, 이를 통해 연약토와 주입재의 교반 효율성이 저하되는 문제점을 방지할 수 있다. In addition, the present invention separates the viscous solidified soil that adheres to the outer circumferential surface of the stirring blade or stirring rod formed in the process of stirring the soft soil and the injection material of the soft ground through the blade of the solidified soil separator disposed below the stirring blade. Through this, it is possible to prevent a problem in which the mixing efficiency of the soft soil and the injection material is lowered.
또한, 본 발명의 실시예에 따라 점도증진제가 첨가되는 주입재는 수중불분리성이 우수하여 지하수나 해수와 접촉되는 환경에서도 시멘트나 중금속 등의 용출이 일어나지 않으므로 환경오염 문제가 발생하지 않으며, 주입시에는 충전을 위한 충분한 유동성이 확보되지만, 주입이 완료된 시점에서는 외압이 해제되므로 유동성이 상실되어 주입재가 지반 내 균열이나 공동을 유실되는 등의 문제가 해결되어, 2차 주입 등과 같은 보완을 생략할 수 있다. 뿐만 아니라, 조기강도 확보 및 장기강도 안전화로 내구성이 뛰어나며 공기를 단축시킬 수 있는 이점이 있다.In addition, the injection material to which the viscosity enhancer is added according to the embodiment of the present invention has excellent water inseparability, so that cement or heavy metals do not elute even in an environment in contact with groundwater or seawater, so there is no environmental pollution problem. However, when the injection is completed, the external pressure is released, so the fluidity is lost and the problem of the injection material losing cracks or cavities in the ground is solved, so supplements such as secondary injection can be omitted. have. In addition, it has excellent durability and shortens the construction period by securing early strength and long-term strength safety boots.
도 1은 교반로드를 통한 굴착 과정에서 부상토 및 슬러지가 발생되는 상태를 개략적으로 도시한 예시도.1 is an exemplary view schematically showing a state in which floating soil and sludge are generated in an excavation process through a stirring rod.
도 2 내지 4는 본 발명의 실시예에 따른 부상토 방진망을 설명하기 위한 개략적인 예시도.2 to 4 are schematic exemplary views for explaining a floating soil dustproof network according to an embodiment of the present invention.
도 5 및 6은 본 발명의 실시예에 따른 부상토 방진망에 마련되는 스토퍼 및 스토퍼 지지대를 설명하기 위한 개략적인 예시도.5 and 6 are schematic examples for explaining a stopper and a stopper support provided in a floating soil dustproof net according to an embodiment of the present invention.
도 7은 종래 기술에 따라 교반날개 및 교반로드의 외주면에 고화토가 달라 붙은 상태를 촬영한 사진.7 is a photograph of a state in which solidified soil is adhered to the outer circumferential surfaces of the stirring blades and the stirring rod according to the prior art.
도 8 내지 10는 본 발명의 실시예에 따른 고화토 분리기를 설명하기 위한 개략적인 예시도.8 to 10 are schematic illustrations for explaining a solidified soil separator according to an embodiment of the present invention.
본 발명은 다양한 변경을 가할 수 있고 여러 가지 형태를 가질 수 있는 바, 특정 실시예들을 본문에 상세하게 설명하고자 한다. 그러나 이는 본 발명을 특정한 개시 형태에 대해 한정하려는 것이 아니며, 본 발명의 사상 및 기술 범위에 포함되는 모든 변경, 균등물 내지 대체물을 포함하는 것으로 이해되어야 한다. Since the present invention can have various changes and various forms, specific embodiments will be described in detail in the text. However, this is not intended to limit the present invention to a specific form disclosed, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.
본 출원에서 사용 한 용어는 단지 특정한 실시 예를 설명하기 위해 사용된 것으로, 본 발명을 한정하려는 의도가 아니다. 단수 의 표현은 문맥상 명백하게 다르게 뜻하지 않는 한, 복수의 표현을 포함한다. 본 출원에서, "포함하다" 또는 "가지다" 등의 용어는 명세서 상에 기재된 특징, 숫자, 단계, 구성요소 등을 조합한 것이 존재함을 지정하려 는 것이지, 하나 또는 그 이상의 다른 특징들이나 숫자, 단계, 구성요소 등을 조합한 것들의 존재 또는 부가 가능성을 미리 배제하지 않는 것으로 이해되어야 한다.Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Expressions in the singular include plural expressions unless the context clearly dictates otherwise. In this application, terms such as "comprise" or "having" are intended to designate that a combination of features, numbers, steps, components, etc. described in the specification exist, but one or more other features or numbers, It should be understood that the presence or addition of combinations of steps, components, etc. is not precluded.
다르게 정의되지 않는 한, 기술적이거나 과학적인 용어를 포함해서 여기서 사용되는 모든 용어들은 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자 에 의해 일반적으로 이해되는 것과 동일한 의미를 가지고 있다. 일반적으로 사용되는 사전에 정의되어 있는 것과 같은 용어들은 관련 기술의 문맥상 가지는 의미와 일치하는 의미를 가지는 것으로 해석되어야 하며, 본 출원에서 명백하게 정의하지 않는 한, 이상적이거나 과도하게 형식적인 의미로 해석되지 않는다.Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in this application, it should not be interpreted in an ideal or excessively formal meaning. don't
여기서, 반복되는 설명, 본 발명의 요지를 불필요하게 흐릴 수 있는 공지 기능, 및 구성에 대한 상세한 설명은 생략한다. 본 발명의 실시형태는 당 업계에서 평균적인 지식을 가진 자에게 본 발명을 보다 완전하게 설명하기 위해서 제공되는 것이다.Here, repeated descriptions, well-known functions that may unnecessarily obscure the subject matter of the present invention, and detailed descriptions of configurations are omitted. Embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art.
이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예에 따른 부상토에 의한 오염을 방지할 수 있는 연약지반개량공법에 대하여 설명하도록 한다. Hereinafter, a soft ground improvement method capable of preventing contamination by floating soil according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.
본 발명은 교반날개가 마련되는 교반로드를 설계심도까지 지중에 관입한 다음 상기 교반로드를 회전시켜 상부방향으로 인발하는 동시에 주입재를 주입하여 굴착된 연약지반과 혼합하여 연약지반을 보강하는 연약지반개량공법에 관한 것으로, 상기 교반로드를 통한 연약지반 굴착시 발생하는 부상토가 부상토 방진망의 외측으로 확산되는 것을 방지할 수 있도록 한 것을 기술적 특징으로 한다. The present invention is a soft ground improvement for reinforcing the soft ground by injecting the stirring rod provided with stirring blades into the ground to the design depth, then rotating the stirring rod to draw it upward, and injecting the injection material to mix with the excavated soft ground. It relates to a construction method, and is characterized in that it is possible to prevent the floating soil generated during excavation of soft ground through the stirring rod from spreading to the outside of the floating soil dustproof net.
상기와 같은 목적을 위하여 본 발명은 상기 교반로드를 감싸는 형태로 배치되는 부상토 방진망(100)을 포함한다. For the above purpose, the present invention includes a floating soil dustproof net 100 disposed in a form surrounding the stirring rod.
도 2 내지 4는 본 발명의 실시예에 따른 부상토 방진망을 설명하기 위한 개략적인 예시도이다. 2 to 4 are schematic exemplary views for explaining a floating soil dustproof net according to an embodiment of the present invention.
도 2 내지 4와 같이, 본 발명에 따른 상기 부상토 방진망(100)은 상기 교반로드의 길이방향을 따라 교반로드를 감싸는 형태로 배치되는 망 본체(110)와, 상기 망 본체가 부력에 의해 부상하는 것을 방지할 수 있도록 상기 망 본체의 일측에 마련되는 중량체(120)를 포함한다. As shown in FIGS. 2 to 4, the floating soil dustproof net 100 according to the present invention includes a net body 110 disposed in a form surrounding the stirring rod along the longitudinal direction of the stirring rod, and the net main body is lifted by buoyancy. It includes a weight body 120 provided on one side of the net main body to prevent it.
상기 망 본체(110)는 상기 교반로드(10)의 길이방향을 따라 교반로드의 소정 영역을 대략 감싸는 형태로 배치된다. The net body 110 is disposed in a form substantially surrounding a predetermined area of the stirring rod along the longitudinal direction of the stirring rod 10 .
예를 들어, 상기 망 본체(110)는 상기 망 본체(110)는 상기 교반로드(10)의 측면과 상면을 차단하는 형태가 되도록 전면망(111)과, 후면망(112)과, 좌측면망(113)과, 우측면망(114) 및 상면망(115)으로 이루어지는 육면체의 형태로 이루어질 수 있다. For example, the net body 110 has a front net 111, a rear net 112, and a left face net so that the net body 110 blocks the side surface and the upper surface of the stirring rod 10. It may be formed in the form of a hexahedron composed of (113), right face network 114, and upper face network 115.
바람직하게는, 상기 망 본체(110)는 교반로드 동작시 교반날개와의 접촉에 의한 간섭이 발생하지 않도록 충분한 폭과 길이로 형성되는 것이 좋다. Preferably, the network body 110 is formed with a sufficient width and length so that interference due to contact with the stirring blades does not occur during the operation of the stirring rod.
또한, 상기 망 본체(110)는 교반로드가 용이하게 관입 및 인발되도록 할 수 있고, 지반 개량 중 부상토가 용이하게 망 본체(110) 내부로 인입될 수 있도록 바닥면이 개방형성되며, 상면망(115)은 상기 교반로드(10)가 관통삽입되도록 중앙부가 소정면적만큼 개방형성된다. In addition, the net main body 110 can allow the stirring rod to be easily penetrated and drawn out, and the bottom surface is open so that the floating soil can be easily introduced into the net main body 110 during ground improvement, and the upper net (115) has a central portion opened by a predetermined area so that the stirring rod 10 is inserted therethrough.
예를 들어, 상기 상면망(115)의 중앙부는 사각 또는 직사각형태로 개방형성될 수 있다. 상기 교반로드(10)는 상기 상면망(115)의 개방된 중앙부를 관통하여 삽입되며, 후술할 스토퍼 및 스토퍼 지지대를 매개로 상기 망 본체(110)와 연결된다. For example, the central portion of the upper surface network 115 may be open in a square or rectangular shape. The stirring rod 10 is inserted through the open central portion of the upper surface network 115 and is connected to the network body 110 via a stopper and a stopper support to be described later.
다음으로, 본 발명에서 상기 망 본체(110)는 기본 골격을 이루는 육면체의 형태의 망 틀(117)이 구비되고, 상기 망 틀(117)의 전면과, 후면과, 좌측면, 우측면 및 상부면을 따라 상기 전면망(111)과, 후면망(112)과, 좌측면망(113)과, 우측면망(114) 및 상면망(115)이 결합될 수 있다. Next, in the present invention, the net main body 110 is provided with a net frame 117 in the form of a hexahedron constituting a basic skeleton, and the front, rear, left, right and top surfaces of the net frame 117 The front mesh 111, the rear mesh 112, the left face mesh 113, the right face mesh 114, and the upper face mesh 115 may be combined along.
상기 전면망(111)과, 후면망(112)과, 좌측면망(113)과, 우측면망(114) 및 상면망(115)의 재질은 본 발명의 권리범위에 한정하지 않으며, 예를 들어 부상토의 유실을 효과적으로 차단할 수 있도록 섬유, 플라스틱, 스틸 또는 그 등가물 중에서 어느 하나의 재질로 형성될 수 있고, 또는 섬유 재질의 제1시트와, 플라스틱 재질의 제2시트 사이에 스틸 재질의 망체가 일체로 삽입되는 형태로 이루어질 수도 있다. The materials of the front net 111, the rear net 112, the left net 113, the right net 114, and the upper net 115 are not limited to the scope of the present invention, for example, floating It may be formed of any one of fibers, plastics, steel, or equivalents to effectively block the loss of toe, or a mesh made of steel is integrally formed between the first sheet made of fiber and the second sheet made of plastic. It may be made in an inserted form.
다음으로, 본 발명에 따른 부상토 방진망(100)은 망 본체가 부력에 의해 부상(浮上) 및 부유(浮遊)하는 것을 방지하도록 하는 중량체(120)를 포함한다. Next, the floating soil dustproof net 100 according to the present invention includes a weight body 120 to prevent the net body from floating and floating due to buoyancy.
상기 중량체(120)는 내부에 물보다 비중이 작은 기체(공기), 액체, 또는 고체 중 선택된 하나 또는 그 이상이 충진되며, 상기 부상토 방진망(100)의 움직임을 최소화할 수 있도록 복수개로 마련될 수 있다. The weight body 120 is filled with one or more selected from gas (air), liquid, or solid having a specific gravity smaller than water, and is provided in plurality to minimize the movement of the floating soil dustproof net 100. It can be.
예를 들어, 상기 중량체(120)는 도 4와 같이 상기 망 본체(110) 내부의 각 코너부 하단에 결합될 수 있으며, 중량에 의해 망 본체가 부력에 의해 부상 또는 부유되는 것을 방지한다. For example, the weight body 120 may be coupled to the lower end of each corner inside the net body 110 as shown in FIG. 4, and the weight prevents the net body from floating or floating due to buoyancy.
상기와 같은 본 발명에 따른 부상토 방진망(100)은 육상에서 교반로드를 감싸는 형태로 설치된 후 교반로드(10)를 따라 설계심도까지 하강한다. 설계심도까지 하강한 부상토 방진망(100)은 중량체(120)에 의해 지지되며, 망 틀(117)에 의해 전면망(111)과, 후면망(112)과, 좌측면망(113)과, 우측면망(114) 및 상면망(115)이 형상의 흐트러짐 없이 교반로드의 측면과 상면을 감싸는 형태로 배치된다. The floating soil dustproof net 100 according to the present invention as described above is installed in a form surrounding the stirring rod on land and then descends to the design depth along the stirring rod 10. The floating soil dustproof net 100, which has descended to the design depth, is supported by the weight body 120, and the front net 111, the rear net 112, the left side net 113 by the net frame 117, The right face net 114 and the upper face net 115 are disposed in a form that surrounds the side surface and the top surface of the stirring rod without disturbing the shape.
따라서, 교반로드(10)가 회전하면서 주입재를 주입하는 과정에서 발생하는 부상토의 확산을 방지할 수 있으며, 이를 통해 수중의 탁도가 원래대로 유지되는 효과를 기대할 수 있다. 또한, 상기 교반로드의 하단부에 형성되는 토출구를 통해 주입되는 주입재의 화학적 성분의 확산이 최소화됨으로 수중 환경의 오염을 방지할 수 있다. 뿐만 아니라, 주입재 성분이 해양 생물에 영향을 미치는 영향이 극히 적기 때문에 주변 양식장의 피해를 최소화할 수 있고, 또한 해수 오염을 방지하기 위한 별도의 물혼탁 방지막 또한 생략할 수 있다. Therefore, it is possible to prevent the diffusion of floating soil generated in the process of injecting the injection material while the stirring rod 10 rotates, and through this, the effect of maintaining the original turbidity of the water can be expected. In addition, since the diffusion of chemical components of the injection material injected through the discharge port formed at the lower end of the stirring rod is minimized, contamination of the aquatic environment can be prevented. In addition, since the injection material component has very little effect on marine life, damage to the surrounding farms can be minimized, and a separate water turbidity prevention film to prevent seawater contamination can also be omitted.
다음으로, 본 발명은 양측 단부가 각각 좌측면망 및 우측면망에 고정되는 스토퍼 지지대(130)가 상기 상면망(115)의 개방형성되는 중앙부를 가로지르는 형태로 설치되며, 상기 교반로드의 외주면 일측에는 상면이 상기 스토퍼 지지대의 저면에 걸림되는 링 형의 스토퍼(140)가 끼움결합된다. Next, in the present invention, the stopper support 130, both ends of which are fixed to the left and right side nets, is installed in the form of crossing the open center of the upper net 115, and on one side of the outer circumferential surface of the stirring rod A ring-shaped stopper 140 whose upper surface is caught on the lower surface of the stopper support is fitted.
상기 스토퍼 지지대(130)는 도 5와 같이 소정직경을 갖는 원형의 파이프(또는 환봉) 한 쌍이 상기 교반로드(10)의 외주면 양측에 밀착되는 형태로 배치될 수 있고, 또는 도 6과 같이 직사각의 판상체로 이루어질 수 있다. 만약 상기 스토퍼 지지대(130)가 직사각의 판상체로 이루어지는 경우 상기 스토퍼 지지대는 소정 두께를 갖는 좋으며, 그 중앙부에는 교반로드(10)의 회전을 인가하도록 별도의 베어링(B)이 탑재될 수 있다. The stopper support 130 may be disposed in a form in which a pair of circular pipes (or round bars) having a predetermined diameter are in close contact with both sides of the outer circumferential surface of the stirring rod 10, as shown in FIG. 5, or a rectangular shape as shown in FIG. It may be made of a plate-like body. If the stopper support 130 is made of a rectangular plate-shaped body, the stopper support may have a predetermined thickness, and a separate bearing B may be mounted at the center thereof to apply rotation of the stirring rod 10.
통상적으로 교반로드(10)는 1x4 또는 2x2의 형태로 배열설치된다. 상기 스토퍼 지지대(130)는 교반로드(10)의 배열형태에 따라 1열 또는 2열로 구비될 수 있다. 본 발명의 이해를 돕기 위한 도면에서는 상기 교반로드(10)가 2x2의 형태로 배열설치되어 한 쌍의 스토퍼 지지대(130)가 상면망(115)의 중앙부에 소정 간격을 두고 배치되는 형태를 도시하였으며, 이는 본 발명의 이해를 돕기 위한 예시일 뿐 본 발명의 권리범위에 한정하지 않는다.Typically, the stirring rods 10 are arranged in the form of 1x4 or 2x2. The stopper supports 130 may be provided in one row or two rows according to the arrangement of the stirring rods 10 . In the drawings to aid understanding of the present invention, the stirring rods 10 are arranged in a 2x2 shape, and a pair of stopper supports 130 are arranged at a predetermined interval in the center of the upper network 115. It is shown , This is only an example to aid understanding of the present invention and is not limited to the scope of the present invention.
한편, 상기 상면망(115)의 중앙부를 관통하여 설치되는 복수의 교반로드(10)는 인접한 교반로드와 충분한 거리를 두고 배치되는 것이 바람직하다. 이는 각각의 교반로드의 외주면에 마련되는 교반날개가 인접한 교반로드의 교반날개와 접촉되는 것을 방지하기 위함이다. 따라서, 2x2의 형태로 교반로드(10)가 배치되는 경우 각 교반로드(10)는 도 2와 같이 상면망(115)의 개방된 중앙부의 각 코너부에 배치될 수 있다. On the other hand, it is preferable that the plurality of stirring rods 10 installed through the central portion of the upper surface network 115 are disposed at a sufficient distance from adjacent stirring rods. This is to prevent the stirring blades provided on the outer circumferential surface of each stirring rod from coming into contact with the stirring blades of adjacent stirring rods. Therefore, when the stirring rods 10 are arranged in a 2x2 shape, each stirring rod 10 may be arranged at each corner of the open central portion of the upper surface network 115 as shown in FIG. 2 .
본 발명은 상기 스토퍼 지지대(130)에 의해 교반로드에 마련되는 교반날개(11)가 상면망(115)과 소정 간격을 두고 이격배치되도록 하여 교반로드 회전시 교반날개와 상면망 간의 직접적인 접촉에 의한 상호 훼손을 방지할 수 있고, 이를 통해 부상토의 확산을 미연에 방지할 수 있으며, 상기 교반로드(10)가 상부로 인발될 때 스토퍼(140)가 스토퍼 지지대(130)에 지지되면서 부상토 방진망(100)이 교반로드(10)를 따라 원활하게 상부로 이동되록 할 수 있다. In the present invention, the stirring blades 11 provided on the stirring rod by the stopper support 130 are spaced apart from the upper surface network 115 at a predetermined interval, so that when the stirring rod rotates, direct contact between the stirring blades and the upper surface network occurs. Mutual damage can be prevented, and through this, the spread of floating soil can be prevented in advance, and when the stirring rod 10 is pulled upward, the stopper 140 is supported by the stopper support 130 and the floating soil dustproof net ( 100) can be smoothly moved upward along the stirring rod 10.
다음으로, 본 발명은 상기 교반날개 또는 교반로드의 외주면에 달라 붙는 점성의 고화토를 분리시킬 수 있는 고화토 분리기(200)를 포함한다. Next, the present invention includes a solidified soil separator 200 capable of separating the viscous solidified soil adhering to the outer circumferential surface of the stirring blade or the stirring rod.
설계심도까지 지중에 관입된 교반로드(10)를 회전시켜 상부방향으로 인발하면서 주입재를 주입하게 되면 연악지반의 연약토와 주입재가 상호 혼합되면서 점성의 고화토가 형성된다.When the injection material is injected while rotating the stirring rod 10 penetrated into the ground to the design depth and drawing it upward, the soft soil of the soft ground and the injection material are mixed with each other to form viscous solidified soil.
이러한 고화토는 점성에 의해 도 7과 같이 교반날개와 교반로드의 외주면에 달라 붙게 되면서, 교반로드가 상부 방향으로 점차 인발되면서 연약토와 주입재를 교반시킬 때 교반 효율성을 저하시키는 문제점을 발생시켰다. As this solidified soil adheres to the outer circumferential surfaces of the stirring blades and the stirring rod as shown in FIG. 7 by viscosity, the stirring rod is gradually drawn upward, causing a problem of lowering the stirring efficiency when stirring the soft soil and the injection material.
이러한 문제점을 해결하기 위한 고화토 분리기(200)는 도 8과 같이 상기 교반날개의 하부에 배치되되 상기 교반로드가 회전 가능하도록 상기 교반로드(10)의 외주면을 감싸는 형태로 결합되는 원통형의 결합부(210)와, 상기 결합부의 측방으로부터 연장형성되는 블레이드(220)를 포함한다. As shown in FIG. 8, the solidified soil separator 200 to solve this problem is a cylindrical coupling part disposed below the stirring blade and coupled in a form surrounding the outer circumferential surface of the stirring rod 10 so that the stirring rod can rotate. 210 and a blade 220 extending from the side of the coupling part.
여기에서, 상기 블레이드는 도 9와 같이 상기 결합부의 측방으로부터 수평방향으로 연장형성되는 제1블레이드(220)와, 상기 제1블레이드(220) 상단의 외측 단부로부터 수직방향으로 배치되는 제2블레이드(220′)로 구성될 수 있다. Here, the blades include a first blade 220 extending in a horizontal direction from the side of the coupling part as shown in FIG. 9, and a second blade disposed vertically from the outer end of the upper end of the first blade 220 ( 220′).
주입재에 혼합된 연약토는 질척한 머드형태를 가지게 되어, 교반로드 및 교반날개가 회전하게 되면 이들이 교반날개 및 교반로드에 부착되면서 점차 큰 항아리 형상의 머드볼을 형성하게 되어 동력장치에 과부하가 걸리게 함과 더불어, 교반로드의 원활한 회전을 방해한다.The soft soil mixed with the injection material has a slimy mud shape, and when the stirring rod and the stirring blade rotate, they are attached to the stirring blade and the stirring rod to gradually form a large pot-shaped mud ball, which overloads the power unit. In addition, it interferes with the smooth rotation of the stirring rod.
상기 제1블레이드(220)와 제2블레이드(220′)는 교반로드의 영향력을 받지 않고 고정된 상태에서 교반로드 회전시 교반날개 또는 교반로드의 외주면의 머드볼이 제1블레이드(220)와 제2블레이드(220′)에 지속적으로 접촉되면서 점차적으로 제거되도록 할 수 있고, 이를 통해 교반 효율성이 저하되는 문제점을 방지할 수 있다. The first blade 220 and the second blade 220′ are not influenced by the stirring rod and in a fixed state, when the stirring rod rotates, the mud balls on the outer circumferential surface of the stirring blade or the stirring rod are separated from the first blade 220. It can be gradually removed while being in continuous contact with the two blades (220'), and through this, it is possible to prevent a problem of deterioration in stirring efficiency.
또한, 본 발명에서 상기 고화토 분리기(200″)는 도 10과 같이 수평방향으로 나란하게 배열되는 한 쌍의 교반로드를 연결하는 형태로 설치될 수 있다. 이 경우 일측의 교반날개(11)를 기준으로 상부와 하부에 각각 결합부와 제1블레이드가 배치되며, 상부의 제1블레이드와 하부의 제1블레이드를 연결하는 형태로 상기 제2블레이드(220″)가 배치될 수 있다. In addition, in the present invention, the solidified soil separator 200″ may be installed in the form of connecting a pair of stirring rods arranged in parallel in the horizontal direction as shown in FIG. In this case, the coupling part and the first blade are disposed at the top and bottom of the agitation blade 11 on one side, respectively, and the second blade (220″) connects the first blade at the top and the first blade at the bottom. ) can be placed.
다음으로, 본 발명의 바람직한 실시예에 따라 상기 연약지반의 보강을 위한 주입재에 대하여 설명하도록 한다. Next, an injection material for reinforcing the soft ground according to a preferred embodiment of the present invention will be described.
상기 주입재는 시멘트 또는 고화재로 이루어진 분체에 물을 혼합하여 제조된다. The injection material is prepared by mixing water with powder made of cement or solidifying material.
시멘트는 포틀랜드 시멘트, 슬래그 시멘트, 포졸란 시멘트 또는 이들 시멘트를 미분쇄한 초미립자 시멘트 중 어느 하나 또는 2 이상을 혼합하여 사용한다. As the cement, any one or a mixture of two or more of Portland cement, slag cement, pozzolan cement, or ultra-fine cement obtained by pulverizing these cements is used.
고화재는 유연탄 플라이애쉬 분말, 무연탄 플라이애쉬 분말, 슬래그 미분말, 천연 포졸란 분말, 석회석 미분말, 실리카흄, 실리카질 광물 미분말, 벤토나이트 중 어느 하나 또는 2 이상을 혼합하여 사용할 수 있다. 또한 조강성 고화재로서 칼슘염 분말 또는 황산염 분말을 포함할 수도 있다.The solidifying material may be any one or a mixture of two or more of bituminous coal fly ash powder, anthracite fly ash powder, slag powder, natural pozzolan powder, limestone powder, silica fume, siliceous mineral powder, and bentonite. In addition, calcium salt powder or sulfate powder may be included as the high-strength solidifying agent.
시멘트계 성분은 물과 반응하여 수화반응을 일으켜 칼슘실리케이트 수화물(CSH)과 수산화칼슘(Ca(OH)2)과 같은 수화물을 생성하게 된다. 그리고 포졸란계의 고화재는 그라우트의 비중을 감소시켜 동일한 중량으로 큰 체적 공동의 충전 및 보강이 가능하게 하고, 굳지 않은 상태에서 그라우트의 블리딩을 저감시키는 효과가 있으며, 굳은 상태에서는 그라우트 경화체의 화학저항성과 내구성을 향상시키고 장기강도를 증가시키는 효과가 있다. 또한, 칼슘염 또는 황산염계의 조강성 고화재는 시멘트 밀크의 물분체비가 높을수록 첨가량이 비례하여 높아지는 것이 바람직한데, 이들은 시멘트계 밀크 그라우트 수용액 중의 수화물 및 수산화칼슘과 반응하여 침상형 결정구조인 에트링자이트(Ettringite)라 불리우는 규산칼슘수화물(3CaO·Al2O3·3CaSO4·3H2O)를 형성하는 과정에서 시멘트 밀크 중의 물을 다량 결합하여 시멘트 밀크 그라우트 중의 자유수를 줄여주는 효과를 발휘한다. 이에 시멘트 밀크 주입재의 블리딩이 억제될 뿐만 아니라, 경화시에는 강도 발현성과 내구성을 증진시키는 효과가 있다.The cement-based component reacts with water to cause a hydration reaction to produce hydrates such as calcium silicate hydrate (CSH) and calcium hydroxide (Ca(OH) 2 ). In addition, the pozzolanic solidifying material reduces the specific gravity of the grout, enabling the filling and reinforcement of large-volume cavities with the same weight, and has the effect of reducing the bleeding of the grout in the unhardened state, and the chemical resistance of the hardened grout in the hardened state. It has the effect of improving durability and increasing long-term strength. In addition, it is preferable that the added amount of the calcium salt or sulfate-based early-hardening material increases in proportion to the higher the water content ratio of the cement milk. In the process of forming calcium silicate hydrate (3CaO Al2O3 3CaSO4 3H2O) called Ettringite, it combines a large amount of water in cement milk to reduce free water in cement milk grout. This not only suppresses the bleeding of the cement milk injection material, but also has the effect of enhancing strength development and durability during curing.
연약지반을 개량하기 위한 시공에서 상기한 구성의 분체의 충전성을 확보하기 위하여 시멘트 밀크의 유동성을 증가시켜야 한다. 이에 본 발명에서는 상기 분체와 물을 혼합하여 시멘트 밀크를 제조시 물 100중량부에 대하여 시멘트 또는 고화재 70~120중량부를 혼합하여 조성한다. In construction for improving soft ground, the fluidity of cement milk must be increased to secure the filling of the powder of the above configuration. Therefore, in the present invention, when mixing the powder and water to produce cement milk, 70 to 120 parts by weight of cement or solidifying material is mixed with respect to 100 parts by weight of water.
한편, 이러한 시멘트 밀크는 교반이나 가압 등의 외력이 존재하는 상태에서는 시멘트 입자가 수중에 균질하게 분포하는 유체 상태로 거동하나, 충전 작업 이후의 외력이 가해지지 않은 상태에서 정치하면 유체인 물과 고체인 분체 입자가 분리하여 다량의 블리딩 수가 발생하거나 물이 차지하는 부분은 장기적으로 공극으로 존재하게 되어 지반 보강 및 차수 효과를 크게 저감시키는 문제점이 있으며, 충전 작업 중이나 이후에 지반에 틈이나 공극이 존재하는 경우 그 틈이나 공극 사이로 흘러나가 역시 지반 보강이나 차수 효과를 크게 저감시킨다는 문제점이 존재한다.On the other hand, such cement milk behaves in a fluid state in which cement particles are homogeneously distributed in water in the presence of an external force such as stirring or pressurization. There is a problem in that a large amount of bleeding water occurs due to the separation of phosphorus powder particles or the part occupied by water exists as a void for a long time, greatly reducing the ground reinforcement and water barrier effect. In this case, there is a problem that it flows through the gaps or gaps and greatly reduces the ground reinforcement or water order effect.
이러한 문제점을 해결하기 위하여 본 발명에서는 시멘트 또는 고화재와 물이 혼합된 시멘트 밀크에 점도증진제를 첨가하여 최종적으로 주입재를 제조한다. 바람직하게는 상기 주입재 100중량부에 대하여 점도증진제 0.1~8중량부가 첨가되며, 이러한 점도증진제의 첨가에 의하여 상기한 문제점들을 모두 해결할 수 있다. In order to solve this problem, in the present invention, the injection material is finally prepared by adding a viscosity enhancing agent to cement milk in which cement or a solidifying material and water are mixed. Preferably, 0.1 to 8 parts by weight of a viscosity enhancing agent is added based on 100 parts by weight of the injection material, and all of the above problems can be solved by the addition of such a viscosity enhancing agent.
한편, 본 발명에서 점도증진제는 상기 점도증진제는 스타치, 메틸셀룰로오스, 폴리알킬렌옥사이드, 아라비아검 등의 증점제로 이루어진 군으로부터 선택된 하나 또는 그 이상의 혼합물을 알칼리 환경 하에서 액체의 점성을 증가시키는 수분산 아크릴 폴리머에 용해한 수용액이다. On the other hand, in the present invention, the viscosity enhancing agent is an aqueous dispersion of one or more mixtures selected from the group consisting of thickeners such as starch, methylcellulose, polyalkylene oxide, and gum arabic to increase the viscosity of a liquid in an alkaline environment. It is an aqueous solution dissolved in acrylic polymer.
상기 주입재를 충전하는 중에는 작업에 필요한 주입재의 유동성이 충분히 확보되지만, 충전 후에 외력이 제거되면 순간적으로 유동성을 잃고 소성을 나타내어 지반의 균열을 통한 유실이 발생하지 않는 특성을 나타낸다. 이러한 가소성의 주입재는 점성의 증가에 의해 유동성이 사라져 외력이 존재하지 않는 자연상태에서는 주입 당시의 형태를 유지할 수 있으나, 생성된 침상형 결정은 결정 간의 결합력이 아직 강하지 못하므로 외력(충전재 주입을 위한 주입압력)이 가해지면 다시 유동성을 나타내기 때문에 공극을 채울 수 있다. 공극을 채운 후 외력을 제거하면(주입재 주입이 완료되어 주입압력이 사라지면) 다시 유동성이 사라지므로 전형적인 소성체의 거동을 보이게 되는 것이다.During the filling of the injection material, the fluidity of the injection material required for the work is sufficiently secured, but when the external force is removed after filling, the fluidity is instantly lost and plasticity is exhibited, so that loss through cracks in the ground does not occur. Such a plastic injection material loses fluidity due to an increase in viscosity and can maintain its shape at the time of injection in a natural state where external force does not exist. When injection pressure) is applied, it shows fluidity again, so it can fill the voids. When the external force is removed after filling the voids (when the injection pressure disappears as the injection of the injection material is completed), the fluidity disappears again, so the behavior of a typical plastic body is exhibited.
따라서, 블리딩이 억제되고 체적 수축이 발생하지 않을 뿐만 아니라, 수중에서도 형상과 구조를 유지하기 때문에, 지하수 등에 노출되어도 주입재가 희석 및 유출되지 않고 수중불분리성이 매우 우수하며, 경화 후 안정적인 강도 발현이 가능하다는 효과를 얻을 수 있다.Therefore, bleeding is suppressed and volumetric shrinkage does not occur, and since the shape and structure are maintained even in water, the injection material does not dilute or flow out even when exposed to groundwater, etc., and the water inseparability is very excellent, and stable strength is developed after curing. You can get the effect that this is possible.
점도증진제를 첨가시에 상기한 바와 같은 효과를 내는 반응원리는 알카리성 환경하에서 점도증진제가 급격하게 활성화되어 장사슬(long chain)의 폴리머 구조를 형성하기 때문이다. 즉, 점도증진제가 긴 체인 형상으로 활성화되어 시멘트, 고화재 및 토양을 하나의 덩어리로 묶어 놓는 역할을 하고, 스타치, 메틸셀룰로오스, 폴리알킬렌옥사이드, 아라비아검 등의 증점제가 액체의 점성을 증가시키기 때문이다. 이에 따라, 각 개별입자들의 유동성이 저하되어 점도가 증가하는 것이며, 시멘트 또는 고화재 내에 존재하는 중금속도 수중으로 용출되지 않는 것이다.The reaction principle that produces the above effect when adding a viscosity enhancing agent is that the viscosity enhancing agent is rapidly activated in an alkaline environment to form a long chain polymer structure. In other words, the viscosity enhancing agent is activated in a long chain shape and serves to bind cement, solidifying material and soil into one lump, and thickeners such as starch, methylcellulose, polyalkylene oxide, and gum arabic increase the viscosity of the liquid. because it makes Accordingly, the fluidity of each individual particle is lowered and the viscosity is increased, and heavy metals present in cement or solidifying material are not eluted into water.
이상에서 설명된 본 발명은 예시적인 것에 불과하며, 본 발명이 속한 기술분야의 통상의 지식을 가진 자라면 이로부터 다양한 변형 및 균등한 타 실시예가 가능하다는 점을 잘 알 수 있을 것이다. 그러므로 본 발명은 상기의 상세한 설명에서 언급되는 형태로만 한정되는 것은 아님을 잘 이해할 수 있을 것이다. 따라서 본 발명의 진정한 기술적 보호 범위는 첨부된 특허청구범위의 기술적 사상에 의해 정해져야 할 것이다. 또한, 본 발명은 첨부된 청구범위에 의해 정의되는 본 발명의 정신과 그 범위 내에 있는 모든 변형물과 균등물 및 대체물을 포함하는 것으로 이해되어야 한다.The present invention described above is only exemplary, and those skilled in the art will appreciate that various modifications and equivalent other embodiments are possible therefrom. Therefore, it will be well understood that the present invention is not limited to the forms mentioned in the detailed description above. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims. It is also to be understood that the present invention includes all modifications, equivalents and alternatives within the spirit and scope of the present invention as defined by the appended claims.
부호의설명explanation of code
10 : 교반로드 11 : 교반날개10: stirring rod 11: stirring blade
20 : 부상토 21 : 슬러지20: floating soil 21: sludge
100 : 부상토 방진망100: floating soil dustproof net
110 : 망 본체110: net body
111: 전면망 112 : 후면망111: front network 112: rear network
113 : 좌측면망 114 : 우측면망113: left side network 114: right side network
115 : 상면망115: top net
117 : 망 틀117: mantle frame
120 : 중량체120: weight body
130 : 스토퍼 지지대 131 : 지지대 연결구130: stopper support 131: support connector
140 : 스토퍼140: stopper
200 : 고화토 분리기200: solidified soil separator
210 : 결합부210: coupling part
220,220′ : 블레이드220,220′ : blade

Claims (4)

  1. 교반날개가 형성되는 교반로드를 설계심도까지 지중에 관입한 다음 상기 교반로드를 회전시켜 상부방향으로 인발하는 동시에 주입재를 주입하여 굴착된 연약지반과 혼합하여 연약지반을 보강하는 연약지반개량공법에 있어서, In the soft ground improvement method of reinforcing the soft ground by injecting the stirring rod in which the stirring blade is formed into the ground to the design depth, then rotating the stirring rod and drawing it upward, injecting the injection material and mixing it with the excavated soft ground. ,
    개방형성되는 바닥면과, 전면망과, 후면망과, 좌측면망과, 우측면망 및 상기 교반로드가 관통삽입되도록 중앙부가 소정면적만큼 개방형성되는 상면망으로 이루어지는 육면체 형태로서 상기 교반로드의 길이방향을 따라 교반로드를 감싸는 형태로 배치되는 망 본체와, 상기 망 본체가 부력에 의해 부상하는 것을 방지할 수 있도록 상기 망 본체의 일측에 마련되는 중량체를 포함하며, 상기 교반로드의 측면과 상면을 차단하는 형태로 배치되어 교반로드의 회전시 발생하는 부상토의 확산을 방지하는 부상토 방진망;을 포함하는 것을 특징으로 하는 부상토에 의한 오염을 방지할 수 있는 연약지반개량공법.It is in the form of a hexahedron consisting of an open bottom surface, a front mesh, a rear mesh, a left surface mesh, a right surface mesh, and an upper surface mesh in which a central portion is opened by a predetermined area so that the stirring rod is inserted through the longitudinal direction of the stirring rod. It includes a net body arranged in a form surrounding the stirring rod along the net body, and a weight body provided on one side of the net body to prevent the net body from floating by buoyancy, and the side surface and upper surface of the stirring rod A soft ground improvement method capable of preventing contamination by floating soil, characterized in that it includes; a floating soil dustproof net that is arranged in a blocking form to prevent the spread of floating soil generated when the stirring rod rotates.
  2. 제1항에 있어서, According to claim 1,
    양측 단부가 각각 좌측면망 및 우측면망에 고정되는 스토퍼 지지대가 상기 상면망의 개방형성되는 중앙부를 가로지르는 형태로 설치되고, A stopper support having both ends fixed to the left and right face nets, respectively, is installed in the form of crossing the open central part of the upper face net,
    상기 교반로드의 외주면 일측에는 상면이 상기 스토퍼 지지대의 저면에 걸림되는 링 형의 스토퍼가 끼움결합되어, A ring-shaped stopper whose upper surface is caught on the lower surface of the stopper support is fitted to one side of the outer circumferential surface of the stirring rod,
    상기 스토퍼 지지대에 의해 교반로드에 마련되는 교반날개가 상면망과 소정간격을 두고 이격배치되도록 하여 교반로드 동작시 교반날개와 상면망 간의 접촉에 의한 상면망의 훼손을 방지할 수 있고, It is possible to prevent damage to the upper surface network due to contact between the stirring blade and the upper surface network during operation of the stirring rod by allowing the stirring blades provided on the stirring rod to be spaced apart from the upper surface network at a predetermined interval by the stopper support,
    상기 교반로드가 상부로 인발될 때 스토퍼가 스토퍼 지지대에 지지되어 교반로드를 따라 부상토 방진망이 원활하게 상부로 이동 가능하도록 한 것을 특징으로 하는 부상토에 의한 오염을 방지할 수 있는 연약지반개량공법.Soft ground improvement method capable of preventing contamination by floating soil, characterized in that the stopper is supported on the stopper support when the stirring rod is pulled upward so that the floating soil dustproof net can move upward smoothly along the stirring rod .
  3. 제 1항에 있어서, According to claim 1,
    상기 교반날개의 하부에 배치되되 상기 교반로드가 회전 가능하도록 교반로드의 외주면을 감싸는 형태로 결합되는 원통형의 결합부와, 연악지반의 연약토와 주입재의 교반 과정에서 형성되는 상기 교반날개 또는 로드의 외주면에 달라 붙는 점성의 고화토가 분리되도록 상기 결합부의 측방으로부터 수평방향을 따라 연장형성되는 블레이드를 포함하는 고화토 분리기가 마련되는 것을 특징으로 하는 부상토에 의한 오염을 방지할 수 있는 연약지반개량공법.A cylindrical coupling part disposed below the stirring blade and coupled in a form surrounding the outer circumferential surface of the stirring rod so that the stirring rod is rotatable, and the stirring blade or rod formed in the process of stirring the soft soil and the injection material of the soft ground Soft ground improvement capable of preventing contamination by floating soil, characterized in that a solidified soil separator including a blade extending in a horizontal direction from the side of the coupling part is provided to separate the viscous solidified soil adhering to the outer circumferential surface. Method.
  4. 제1항에 있어서, 상기 주입재는 물 100중량부에 대하여 시멘트 또는 고화재 70~120중량부를 혼합하여 조성되며, The method of claim 1, wherein the injection material is formed by mixing 70 to 120 parts by weight of cement or solidifying material with respect to 100 parts by weight of water,
    상기 주입재 100중량부에 대하여 점도증진제 0.1~8중량부가 더 첨가되는 것을 특징으로 하는 부상토에 의한 오염을 방지할 수 있는 연약지반개량공법.Soft ground improvement method capable of preventing contamination by floating soil, characterized in that 0.1 to 8 parts by weight of the viscosity enhancer is further added with respect to 100 parts by weight of the injection material.
PCT/KR2021/012580 2021-05-31 2021-09-15 Construction method for improving soft ground, which can prevent contamination caused by loose soil WO2022255545A1 (en)

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Publication number Priority date Publication date Assignee Title
JP2006225971A (en) * 2005-02-17 2006-08-31 Onoda Chemico Co Ltd Solidifying device and solidifying method
KR101391908B1 (en) * 2013-10-28 2014-05-07 준백건설 주식회사 Device for silt protection
JP2015151734A (en) * 2014-02-13 2015-08-24 株式会社不動テトラ Ground improvement device and ground improvement method using the device
KR20170059372A (en) * 2015-11-20 2017-05-30 (주)대한엔지니어링 Easy to install and recover silt protector
KR20180002288A (en) * 2016-06-29 2018-01-08 한스텍주식회사 Grout material composition and high fluidity-grout material using the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006225971A (en) * 2005-02-17 2006-08-31 Onoda Chemico Co Ltd Solidifying device and solidifying method
KR101391908B1 (en) * 2013-10-28 2014-05-07 준백건설 주식회사 Device for silt protection
JP2015151734A (en) * 2014-02-13 2015-08-24 株式会社不動テトラ Ground improvement device and ground improvement method using the device
KR20170059372A (en) * 2015-11-20 2017-05-30 (주)대한엔지니어링 Easy to install and recover silt protector
KR20180002288A (en) * 2016-06-29 2018-01-08 한스텍주식회사 Grout material composition and high fluidity-grout material using the same

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