KR100463104B1 - Pillar-shaped hardening structure formation equipment and the formation method of leading cement milk pressure injection - Google Patents
Pillar-shaped hardening structure formation equipment and the formation method of leading cement milk pressure injection Download PDFInfo
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- KR100463104B1 KR100463104B1 KR1020040010811A KR20040010811A KR100463104B1 KR 100463104 B1 KR100463104 B1 KR 100463104B1 KR 1020040010811 A KR1020040010811 A KR 1020040010811A KR 20040010811 A KR20040010811 A KR 20040010811A KR 100463104 B1 KR100463104 B1 KR 100463104B1
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- chemical liquid
- cement
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- 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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- 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
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00146—Sprayable or pumpable mixtures
- C04B2111/00155—Sprayable, i.e. concrete-like, materials able to be shaped by spraying instead of by casting, e.g. gunite
- C04B2111/00172—Sprayable, i.e. concrete-like, materials able to be shaped by spraying instead of by casting, e.g. gunite by the wet process
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
Description
본 발명은 시멘트밀크 중ㆍ고압분사를 통한 주상형 고결체 형성장치 및 형성방법에 관한 것으로, 특히 대상지반을 천공하여 지중에 천공부위를 형성한 후, 상기 천공부위에 고결체 형성장치를 삽입한 후, 이를 상향으로 인발하면서 천공부위내에 시멘트밀크를 분사 주입하여 지중연속벽이나 기초(지지)파일과 같은 지중 구조체를 형성하도록 한 시멘트밀크 중ㆍ고압분사를 통한 주상형 고결체 형성장치 및 형성방법에 관한 것이다.The present invention relates to a columnar solidified body forming apparatus and a method for forming the cement milk through medium and high pressure spraying, and in particular, after forming a punched portion in the ground by drilling the target ground, the solidified body forming apparatus is inserted into the punched portion. Then, the apparatus for forming columnar solid body through medium and high pressure injection of cement milk, which is formed by drawing cement upward and spraying cement milk into the perforated part to form underground structures such as underground continuous walls and foundation (support) piles. It is about.
일반적으로 연약지반을 개량하기 위한 시멘트밀크 주입공법은 대상지반을 천공후 천공부위에 주입관을 설치하여 다수의 분사노즐 방식으로 시멘트밀크를 주입하는 공법으로, 누수지층 차수 및 지반보강에 효과적이며, 세사, 실트, 사력층을 제외한 전 지반에 걸쳐 적용이 가능하며, 장비가 간편하며, 약액주입공법(LW, SGR)에 비해 지반개량 강도가 큰 이점이 있다.In general, the cement milk injection method for improving the soft ground is a method of injecting cement milk using a plurality of injection nozzles by installing an injection pipe at the perforated part after drilling the ground, and is effective for leaking water layer reinforcement and ground reinforcement. It can be applied to all the ground except sesa, silt, and sand layer, and the equipment is simple, and the ground improvement strength is large compared to the chemical injection method (LW, SGR).
그러나, 상기한 바와 같은 종래의 시멘트밀크 주입공법은 약액주입공법(LW, SGR)에 비해 차수효과가 떨어지고, 시멘트 소요량이 많으며, 겔타임 조절이 안되는 문제점이 있다.However, the conventional cement milk injection method as described above has a problem of lowering the ordering effect, a large amount of cement, and gel time control is not comparable to the chemical liquid injection method (LW, SGR).
한편, 심층혼합공법은 주입롯드를 지반 내에서 회전 인발시키면서, 그 선단의 분사노즐로부터 상기 주입롯드의 직각방향으로 지반 개량재를 물 또는 에어와 혼합하여 고압 분사하여, 지반 개량재와 주변 지반토를 교란 혼합하여 원주상의 개량체를 형성하는 공법이다.On the other hand, in the deep mixing method, while the injection rod is drawn out in the ground, the ground improver is mixed with water or air in a direction perpendicular to the injection rod from the injection nozzle at the tip thereof, and the high pressure spray is carried out. Is a method of disturbing and mixing to form a columnar improved body.
상기한 바와 같은 종래의 심층혼합공법은 토질에 따라 영향을 받기 쉽고, 1회의 시공으로 넓은 범위의 지반을 개량할 수 있으며, 개량체 상호의 밀착성이 뛰어난 곳으로부터 토류벽이나 차수벽의 조성에 많이 사용되는 장점이 있다.The conventional deep mixing method as described above is susceptible to soil quality, and can be improved in a wide range of soil in one construction. There is an advantage.
그러나, 상기한 바와 같은 종래의 심층혼합공법은 지반토와 시멘트가 혼합되어 지중에 개량체를 형성하는 것으로, 연약지반에서 시행할 경우에는 점토입자와 시멘트가 혼합되어 개량체가 형성됨으로 인하여 강도가 극히 떨어지는 문제점이 있다.However, the conventional deep mixing method as described above is that the ground soil and cement are mixed to form an improved body in the ground, and when it is carried out in soft ground, the clay is mixed with cement and the strength is extremely high due to the improved body being formed. There is a problem falling.
이에, 본 발명은 상기한 바와 같은 제문제점을 해결하기 위해 안출된 것으로써, 맥상주입과 심층혼합공법의 단점을 보완하고, 어떠한 지층에도 확실하게 주입되도록 내구성약액과 분쇄시멘트를 혼합한 주입재를 사용하되, 이중관 롯드의 상부노즐에서는 지반을 교란시킴과 동시에 하부노즐에서는 중ㆍ고압분사의 방사상으로 맥상으로 침투시키며, 이중관 롯드의 인발은 상향 선회 회전하면서 인발하여 대상지반을 균일하게 개량시키며 반영구적인 차수벽을 형성하거나 연약지반을 보강하도록 한 시멘트밀크 중ㆍ고압분사를 통한 주상형 고결체 형성장치 및 형성방법을 제공하는데 그 목적이 있다.Therefore, the present invention was devised to solve the above problems, to compensate for the shortcomings of the pulmonary injection and the deep mixing method, using an injection material mixed with a durable chemical solution and grinding cement to be surely injected into any strata. However, in the upper nozzle of the double pipe rod, the ground is disturbed, and at the same time, the lower nozzle penetrates into the veins radially of the medium and high pressure injection. It is an object of the present invention to provide an apparatus and a method for forming a columnar solidified body through medium and high pressure spraying of cement milk, which are formed to form or reinforce soft ground.
도 1(a) 내지 1(e)은 본 발명에 따른 시멘트밀크 중ㆍ고압분사를 통한 주상형 고결체를 시공하는 순서를 도시한 공정도,1 (a) to 1 (e) is a process chart showing the procedure for constructing columnar solidified body through the medium and high pressure spraying cement milk according to the present invention,
도 2는 본 발명에 따른 시멘트밀크 중ㆍ고압분사를 통한 주상형 고결체 형성장치의 이중관 롯드를 도시한 개략도,Figure 2 is a schematic diagram showing a double tube rod of the columnar solidified body forming apparatus through the medium and high pressure spraying cement milk according to the present invention,
도 3은 본 발명에 따른 시멘트밀크 중ㆍ고압분사를 통한 주상형 고결체 형성장치를 도시한 단면도.Figure 3 is a cross-sectional view showing a columnar solidified body forming apparatus through the cement milk medium and high pressure spray according to the present invention.
-도면의 주요부분에 대한 부호의 설명-Explanation of symbols on the main parts of the drawing
10 : 스위벨 12 : 시멘트밀크 주입구10: swivel 12: cement milk inlet
14 : 약액 주입구 20 : 이중관 롯드14: chemical liquid inlet 20: double tube rod
22 : 시멘트밀크 분사노즐 24 : 약액 분사노즐22: cement milk spray nozzle 24: chemical liquid spray nozzle
26 : 체크밸브 A : 주상형 고결체 형성장치26: check valve A: columnar solidified body forming apparatus
B : 회전충격식 천공기 G : 연약지반B: Rotary Impact Drill G: Soft Ground
H : 천공부위 S : 고결체H: Perforation S: Solid
상기한 목적을 달성하기 위한 본 발명에 따른 시멘트밀크 중ㆍ고압분사를 통한 주상형 고결체 형성장치는 최상단에 위치되며, 시멘트밀크 주입구와 약액 주입구가 형성된 스위벨과; 상기 스위벨의 하부와 일체로 연결되며, 상기 시멘트밀크 주입구와 약액 주입구와 각각 연통되도록 다수개의 시멘트밀크 분사노즐과 약액 분사노즐이 형성된 이중관 롯드로 구성됨을 특징으로 한다.Apparatus for forming columnar solidified body through the medium and high pressure injection of cement milk according to the present invention for achieving the above object is a swivel formed at the top of the cement milk injection port and the chemical liquid injection port; It is integrally connected with the lower part of the swivel, characterized in that it consists of a double tube rod formed with a plurality of cement milk injection nozzles and chemical liquid injection nozzles so as to communicate with the cement milk injection port and the chemical liquid injection port, respectively.
또한, 상기한 목적을 달성하기 위한 본 발명에 따른 시멘트밀크 중ㆍ고압분사를 통한 주상형 고결체 형성방법은 대상 연약지반을 회전충격식 천공기로 천공하여 천공부위를 형성하는 단계; 상기 천공부위에 청구항1의 주상형 고결체 형성장치를 삽입하는 단계; 상기 주상형 고결체 형성장치의 시멘트밀크 주입구와 약액 주입구에 각각의 시멘트밀크와 내구성약액으로 이루어진 순결재 및 완결재를 주입하고, 상향으로 선회 인발하면서 약액분사노즐을 통해 지반을 교란시키고, 시멘트밀크 분사노즐은 맥상 혼합침투주입을 통해 지중에 시멘트밀크와 순결재 및 완결재를 중ㆍ고압분사하는 단계를 시행하여, 지중에 주상형 고결체를 시공함을 특징으로 한다.In addition, the columnar solidified body forming method through the cement milk medium and high pressure spray according to the present invention for achieving the above object comprises the steps of perforating the target soft ground with a rotary impact drill; Inserting the columnar solidified body forming apparatus of claim 1 in the perforated portion; The cement milk injection port and the chemical liquid injection port of the columnar solidified body forming apparatus are injected with pure and finished materials consisting of respective cement milks and durable chemical liquids, and disturbed the ground through the chemical liquid spray nozzles while drawing upward. The spray nozzle is characterized by constructing columnar solidified bodies in the ground by performing a step of medium and high pressure spraying of cement milk, pure and finished materials in the ground through a mixed penetrating injection.
이하, 본 발명을 첨부한 예시도면을 참조하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail.
도 1(a) 내지 1(e)은 본 발명에 따른 시멘트밀크 중ㆍ고압분사를 통한 주상형 고결체를 시공하는 순서를 도시한 공정도이며, 도 2는 본 발명에 따른 시멘트밀크 중ㆍ고압분사를 통한 주상형 고결체 형성장치의 이중관 롯드를 도시한 개략도이며, 도 3은 본 발명에 따른 시멘트밀크 중ㆍ고압분사를 통한 주상형 고결체 형성장치를 도시한 단면도이다.1 (a) to 1 (e) is a process chart showing the procedure for constructing the columnar solidified body through the medium and high pressure spraying cement milk according to the present invention, Figure 2 is a medium and high pressure spraying cement milk according to the present invention It is a schematic diagram showing the double tube rod of the columnar solidified body forming apparatus through, Figure 3 is a cross-sectional view showing the columnar solidified body forming apparatus through the medium and high pressure spraying cement milk according to the present invention.
이들 도면에 도시된 바와 같이, 본 발명에 따른 시멘트밀크 중ㆍ고압분사를 통한 주상형 고결체 형성장치는 최상단에 위치되며, 시멘트밀크 주입구(12)와 약액 주입구(14)가 형성된 스위벨(10)과; 상기 스위벨(10)의 하부와 일체로 연결되며,상기 시멘트밀크 주입구(12)와 약액 주입구(14)와 각각 연통되도록 다수개의 시멘트밀크 분사노즐(22)과 약액 분사노즐(24)이 형성된 이중관 롯드(20)로 구성된다.As shown in these figures, the columnar solidified body forming apparatus through the cement milk medium and high pressure spray according to the present invention is located at the top, the swivel 10 is formed with a cement milk inlet 12 and the chemical liquid inlet 14 and; Double pipe rod formed integrally with the lower part of the swivel 10, the plurality of cement milk injection nozzles 22 and the chemical liquid injection nozzles 24 are formed so as to communicate with the cement milk injection port 12 and the chemical liquid injection port 14, respectively. It consists of 20.
여기서, 상기 이중관 롯드(20)의 최하단 내측면에는 체크밸브(26)가 설치된 구조이며, 이와 같은 상기 체크밸브(26)는 유체를 한 방향으로만 흘리고 역류를 방지하는 밸브를 의미하며, 펌프의 토출관 등에 사용된다.Here, the bottom end inner surface of the double pipe rod 20 has a structure in which a check valve 26 is installed, such a check valve 26 refers to a valve that flows fluid in only one direction and prevents backflow. It is used for the discharge tube.
즉, 본 발명에 따른 시멘트밀크 중ㆍ고압분사를 통한 주상형 고결체 형성장치는 스위벨(10)과 이중관 롯드(20)로 구성된다.That is, the columnar solidified body forming apparatus through the medium and high pressure spray of cement milk according to the present invention is composed of a swivel 10 and a double pipe rod (20).
여기서, 상기 스위벨(10)은 완결재 및 순결재를 주입할 수 있도록 시멘트밀크 주입구(12)와 약액 주입구(14)가 형성된 구조이다.Here, the swivel 10 has a structure in which a cement milk inlet 12 and a chemical liquid inlet 14 are formed to inject a finished material and a pure material.
또한, 상기 이중관 롯드(20)는 스위벨(10)의 하단부에 일체로 설치되며, 상기 스위벨(10)의 시멘트밀크 주입구(12)와 약액 주입구(14)를 통해 주입된 시멘트밀크 및 약액이 배출되도록 시멘트밀크 분사노즐(22)과 약액 분사노즐(24)이 형성된 구조로서, 시멘트밀크 및 약액 분사에 따라 선회 상향인발을 원활하게 한 구조이다.In addition, the double tube rod 20 is integrally installed at the lower end of the swivel 10, so that the cement milk and the chemical liquid injected through the cement milk inlet 12 and the chemical liquid inlet 14 of the swivel 10 is discharged. As the cement milk injection nozzle 22 and the chemical liquid injection nozzle 24 are formed, it is a structure that smoothly turns upward according to the cement milk and chemical liquid injection.
한편, 상기 이중관 롯드(20)의 최하단 내측면에는 체크밸브(26)가 설치되는 바, 이 체크밸브(26)는 지반(G) 천공시 체크밸브(26)가 열린 상태로 굴착용수가 공급되는 역할을 하며, 지반(G)굴착이 완료된 후 중ㆍ고압분사시에는 자동으로 체크밸브(26)가 폐쇄되어 상기 시멘트밀크 분사노즐(22) 및 약액 분사노즐(24)로만 중ㆍ고압으로 시멘트밀크 및 약액이 분사되도록 장착된 구조이다.On the other hand, a check valve 26 is installed on the lowermost inner side surface of the double pipe rod 20, and the check valve 26 is provided with excavation water with the check valve 26 open when drilling the ground (G). After the ground (G) excavation is completed, the check valve 26 is automatically closed at the time of medium and high pressure injection, so that the cement milk is medium and high pressure only with the cement milk injection nozzle 22 and the chemical liquid injection nozzle 24. And it is a structure mounted so that the chemical liquid is injected.
이하, 상기한 바와 같은 구성으로 이루어진 본 발명에 따른 시멘트밀크 중ㆍ고압분사를 통한 주상형 고결체 형성에 대해 설명한다.Hereinafter, the formation of columnar solidified bodies through the medium and high pressure spraying of cement milk according to the present invention having the above-described configuration will be described.
도 1(a) 내지 1(e)은 본 발명에 따른 시멘트밀크 중ㆍ고압분사를 통한 주상형 고결체 형성장치를 이용하여 주상형 고결체를 시공하는 순서를 도시한 공정도이다.1 (a) to 1 (e) is a process chart showing the procedure for constructing columnar solidified body using the columnar solidified body forming apparatus through the medium and high pressure injection of cement milk according to the present invention.
이들 도면에 도시된 바와 같이, 본 발명에 따른 시멘트밀크 중ㆍ고압분사를 통한 주상형 고결체 형성방법은 대상 연약지반(G)을 회전충격식 천공기(B)로 천공하여 천공부위(H)를 형성하는 단계; 상기 천공부위(H)에 청구항1의 주상형 고결체 형성장치(A)를 삽입하는 단계; 상기 주상형 고결체 형성장치(A)의 시멘트밀크 주입구(12)와 약액 주입구(14)에 각각의 시멘트밀크와 내구성약액을 주입하고, 상향으로 선회 인발하면서 약액분사노즐(24)을 통해 지반을 교란시키고, 시멘트밀크 분사노즐(22)은 맥상 혼합침투주입을 통해 지중에 시멘트밀크와 순결재 및 완결재를 중ㆍ고압분사하는 단계를 시행하여, 지중에 주상형 고결체(S)를 시공하는 것이다.As shown in these drawings, the columnar solidified body forming method through the cement milk medium and high pressure spray according to the present invention by drilling the target soft ground (G) with a rotary impact type punching machine (B) to drill the drilling site (H) Forming; Inserting the columnar solidified body forming apparatus (A) of claim 1 in the perforated portion (H); Inject the cement milk and the durable chemical liquid into the cement milk inlet 12 and the chemical liquid inlet 14 of the columnar solidified body forming apparatus (A), and ground the ground through the chemical liquid spray nozzle 24 while drawing upwardly. The perturbation of cement milk injection nozzle 22 is carried out the step of medium and high pressure injection of cement milk, chastity and finished material in the ground through the mixing of the penetrating mixture penetration, thereby constructing columnar solidified body (S) in the ground. will be.
여기서, 상기 시멘트밀크는 통상의 포틀랜드시멘트를 습식분쇄기로 15분간 분쇄한 분쇄시멘트를 사용한다.In this case, the cement milk is used for the grinding cement obtained by grinding a conventional portland cement with a wet mill for 15 minutes.
또한, 상기 중ㆍ고압분사는 시멘트밀크 분사노즐(22)과 약액 분사노즐(24)의 압력이 50∼100㎏f/㎠으로 분사한다.In addition, the medium and high pressure spray is injected at a pressure of 50 to 100 kgf / cm 2 of the cement milk injection nozzle 22 and the chemical liquid injection nozzle 24.
그리고, 상기 이중관 롯드(20)는 0.5∼1.0m/분의 속도로 상향으로 선회 인발한다.The double tube rod 20 pivots upwardly at a speed of 0.5 to 1.0 m / min.
여기서, 상기 약액의 순결재는 지중에 분사후 3∼9초내에서 순결함에 비하여, 상기 완결재는 지중에 분사후 60∼90초내에서 완결토록 한다.Here, the pure material of the chemical liquid is pure within 3 to 9 seconds after the injection into the ground, the finished material is to be completed within 60 to 90 seconds after the injection into the ground.
즉, 본 발명에 따른 시멘트밀크 중ㆍ고압분사를 통한 주상형 고결체 형성방법은 개량하고자 하는 대상 연약지반(G)의 임의지역까지 회전충격식 천공기(B)로 천공하여 천공부위(H)를 형성한 후, 상기 천공부위(H)에 주상형 고결체 형성장치(A)를 삽입한 후, 상기 주상형 고결체 형성장치(A)를 상향으로 선회인발하면서 스위벨(10)의 시멘트밀크 주입구(12)와 약액 주입구(14)를 통해 시멘트밀크와 약액을 주입함과 동시에 이중관 롯드(20)의 시멘트밀크 분사노즐(22)과 약액 분사노즐(24)을 통해 시멘트밀크와 약액을 분사하면서 현지토를 교란 혼합함으로써, 새로운 주상형 고결체를 지중에 형성시켜 지중연속벽이나 기초파일 및 차수벽을 형성하는 것이다.That is, the method for forming columnar solidified body through the medium and high pressure spraying of cement milk according to the present invention is made by drilling a rotary impact type borer (B) to an arbitrary region of the target soft ground (G) to be improved. After the formation, the columnar solidified body forming apparatus (A) is inserted into the perforated portion (H), and the cement milk inlet of the swivel (10) while pivoting upwards of the columnar solidified body forming apparatus (A) ( 12) and the cement milk and the chemical solution is injected through the chemical liquid injection port 14, while the cement milk and the chemical liquid are sprayed through the cement milk spray nozzle 22 and the chemical liquid spray nozzle 24 of the double pipe rod 20. By disturbing and mixing, new columnar-shaped solid bodies are formed in the ground to form underground continuous walls, foundation piles, and order walls.
이때, 상기 약액은 실리카 또는 졸계통의 내구성약액을 사용토록 하되, 상기 내구성약액은 1∼3일 이내 조기강도의 발현이 가능하며, 3일 후 고결강도는 20㎏f/㎠ 이상이 되며, 토중의 칼슘(Ca+)과 결합함으로 인하여 침투효과가 증대되며, 시간이 지남에 따라 강도가 증대되는 약액이다.At this time, the chemical solution is to use a durable chemical solution of silica or sol system, the durable chemical solution can be expressed in early strength within 1 to 3 days, the solidification strength after 3 days is more than 20㎏f / ㎠, Due to the combination of calcium (Ca +) and the penetration effect is increased, the strength is increased over time.
또한, 상기 시멘트밀크는 일반적인 포틀랜드시멘트를 습식분쇄기로 15분간 분쇄한 분쇄시멘트를 사용하되, 1일 제조는 30∼50㎥으로 하며, 지반(G)의 세사층까지 침투가 용이한 분쇄시멘트이다.In addition, the cement milk is used to grind the general portland cement pulverized cement for 15 minutes with a wet mill, the daily production is 30 to 50 ㎥, the cement is easy to penetrate to the fine sand layer of the ground (G).
한편, 본 발명에 따른 시멘트밀크 중ㆍ고압분사를 통한 주상형 고결체 형성에 사용되는 장치(A)는 다수개의 시멘트밀크 분사노즐(22)과 다수개의 약액 분사노즐(24)을 가지며, 중ㆍ고압으로 방사상 주입이 가능하며, 상기 시멘트밀크 분사노즐(22)과 약액 분사노즐(24)의 압력이 50kgf/㎠ 이상으로 주입펌프를 사용하여 주입토록 한다.On the other hand, the apparatus (A) used for forming the columnar solidified body through the cement milk medium and high pressure spray according to the present invention has a plurality of cement milk injection nozzles 22 and a plurality of chemical liquid injection nozzles 24, Radial injection at high pressure is possible, and the pressure of the cement milk injection nozzle 22 and the chemical liquid injection nozzle 24 is injected using an injection pump with a pressure of 50 kgf / cm 2 or more.
특히, 상기 주상형 형성장치(A)의 이중관 롯드(20)는 상향으로 선회인발하면서 균일한 주입재의 지반(G)침투가 가능하며, 이 때 상기 인발속도는 0.5∼1.0m/분으로 한다.In particular, the double tube rod 20 of the columnar forming device (A) is capable of penetrating the ground (G) of the uniform injection material while pivoting upwards, wherein the drawing speed is 0.5 ~ 1.0m / min.
또한, 상기 주입재는 유속이 빠른 자갈이나 전석층에서도 주입재의 유실됨이 없이 주입이 가능한데 순결재의 순결시간은 3∼9초내에서 순결하고, 상기 완결재의 완결시간은 지중에 분사후 60∼90초내에서 완결토록 하여 대상지반(G)에 대한 정확한 주입 및 주입재 유실이 방지되는 작용효과가 있다.In addition, the injection material can be injected without loss of the injection material even in the gravel or the electrode layer with a high flow rate, the purity time of the pure material is pure within 3 to 9 seconds, the completion time of the finished material is within 60 to 90 seconds after spraying in the ground In order to complete the in the target ground (G) has the effect of preventing the precise injection and loss of the injection material.
한편, 상기한 바와 같은 시멘트밀크 중ㆍ고압분사를 통한 주상형 고결체 형성장치 및 형성방법은 나트륨 용탈현상이 타 공법에 비하여 상대적으로 적어 지반(G)내 내구성이 증대되고, 일부 나트륨이 용탈되어도 백화현상이 발생되지 않으며, 알칼리 용출의 최소화로 인한 토양오염을 방지할 수 있는 작용효과가 있다.On the other hand, the above-described columnar solidified body forming apparatus and forming method through the cement milk medium and high pressure spraying is relatively less sodium dissolution than other methods, so durability in the ground (G) is increased, even if some sodium is leached Whitening does not occur, and there is an effect that can prevent soil contamination by minimizing alkali elution.
이상에서 설명한 바와 같이, 본 발명에 따른 시멘트밀크 중ㆍ고압분사를 통한 주상형 고결체 형성장치 및 형성방법은 다음과 같은 효과가 있다.As described above, the columnar solidified body forming apparatus and forming method through the cement milk medium-high pressure spray according to the present invention has the following effects.
첫째, 본 발명은 주입재로 내구성약액을 사용함으로써 1∼3일 이내 조기강도를 발현하며, 3일 후 고결강도는 20㎏f/㎠이 되며, 토중의 칼슘과 결합반응으로 인하여 지반침투 효과가 증대되며, 시간이 지남에 따라 강도가 증대되는 이점이 있다.First, the present invention expresses the early strength within 1 to 3 days by using the durable chemical solution as an injection material, and after 3 days the solidification strength is 20㎏f / ㎠, the ground penetration effect is increased due to the combined reaction with calcium in soil And, there is an advantage that the strength is increased over time.
둘째, 본 발명은 세사층까지 침투가 가능함으로 인하여 지반 침투성이 우수한 이점이 있다.Second, the present invention has the advantage of excellent ground permeability because it can penetrate up to the fine sand layer.
셋째, 본 발명은 이중관 롯드에 의한 시멘트밀크와 순결재 및 완결재 주입이 선회 상향인발하면서 시멘트밀크와 순결재 및 완결재의 중ㆍ고압분사가 이루어짐으로써, 주입재의 균일한 지반침투가 가능하여 혼합 및 맥상침투효과가 우수하며, 구근형성이 양호한 이점이 있다.Third, the present invention is made by the medium and high pressure injection of cement milk, chastity and finished material while the injection of cement milk and chastity and finished material by turning the double tube rod, the mixing and injection of the injection material is possible It has an excellent effect on the penetration of the pulse and has good bulb formation.
넷째, 본 발명은 유속이 빠른 자갈이나 전석층에서도 주입재의 유실없이 주입이 가능함으로 대상지반에 대한 정확한 주입이 가능하며, 주입재가 유실되는 것을 방지할 수 있는 이점이 있다.Fourth, the present invention can be accurately injected to the target ground can be injected even without the loss of the injection material in the gravel or the electrode layer with a high flow rate, there is an advantage that can prevent the injection material is lost.
다섯째, 본 발명은 나트륨 용탈현상이 상대적으로 타 공법에 비하여 적어 내구성이 증대되며, 일부 나트륨이 용탈되어도 백화현상이 발생되지 않으며, 알칼리 용출의 최소화로 인한 토양오염을 방지할 수 있는 환경친화적인 이점이 있다.Fifth, in the present invention, sodium dissolution phenomenon is relatively small compared to other methods, so durability is increased, and even if some sodium is eluted, whitening does not occur, and environmentally friendly advantages that can prevent soil contamination by minimizing alkali elution There is this.
여섯째, 본 발명은 굴착공사시 지하수 유입 및 보일링을 방지하며, 터널 및 쉴드구간 지하수 유입을 방지하며, 점성토층의 희빙을 방지하며, 관로매설용 자립식 토류벽 등에 널리 적용할 수 있는 장점이 있다.Sixth, the present invention prevents groundwater inflow and boiling during excavation construction, prevents groundwater inflow in tunnels and shield sections, prevents whitening of viscous soil layers, and can be widely applied to freestanding earth walls for laying pipelines. .
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| KR1020040010811A KR100463104B1 (en) | 2004-02-18 | 2004-02-18 | Pillar-shaped hardening structure formation equipment and the formation method of leading cement milk pressure injection |
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| KR1020040010811A KR100463104B1 (en) | 2004-02-18 | 2004-02-18 | Pillar-shaped hardening structure formation equipment and the formation method of leading cement milk pressure injection |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100822829B1 (en) | 2007-09-19 | 2008-04-16 | 지산특수토건주식회사 | Apparatus for excavation and soil improvement moving water pressure |
| KR100831705B1 (en) * | 2007-09-19 | 2008-05-22 | 지산특수토건주식회사 | Soil improvement method of continuous cutting, soil ejecting and mortar injecting process |
| KR101339968B1 (en) | 2013-10-28 | 2013-12-10 | 우경기술주식회사 | Swirl type grout mixing apparatus |
| KR101545254B1 (en) * | 2014-08-28 | 2015-08-20 | 최정옥 | Medium Pressure Grouting device and it's using a columnar structure construction method |
| KR102072790B1 (en) | 2019-07-24 | 2020-02-03 | 엘케이건설산업 주식회사 | Middle pressure type grouting apparatus and construction method of using the same |
| CN116591161A (en) * | 2023-05-04 | 2023-08-15 | 中交广州航道局有限公司 | Cement mixing pile construction device and use method |
-
2004
- 2004-02-18 KR KR1020040010811A patent/KR100463104B1/en active IP Right Review Request
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100822829B1 (en) | 2007-09-19 | 2008-04-16 | 지산특수토건주식회사 | Apparatus for excavation and soil improvement moving water pressure |
| KR100831705B1 (en) * | 2007-09-19 | 2008-05-22 | 지산특수토건주식회사 | Soil improvement method of continuous cutting, soil ejecting and mortar injecting process |
| KR101339968B1 (en) | 2013-10-28 | 2013-12-10 | 우경기술주식회사 | Swirl type grout mixing apparatus |
| CN104552599A (en) * | 2013-10-28 | 2015-04-29 | 又炅技术株式会社 | Swirl type grout mixing apparatus |
| KR101545254B1 (en) * | 2014-08-28 | 2015-08-20 | 최정옥 | Medium Pressure Grouting device and it's using a columnar structure construction method |
| KR102072790B1 (en) | 2019-07-24 | 2020-02-03 | 엘케이건설산업 주식회사 | Middle pressure type grouting apparatus and construction method of using the same |
| CN116591161A (en) * | 2023-05-04 | 2023-08-15 | 中交广州航道局有限公司 | Cement mixing pile construction device and use method |
| CN116591161B (en) * | 2023-05-04 | 2024-01-16 | 中交广州航道局有限公司 | Cement mixing pile construction device and use method |
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