KR960013587B1 - Method and apparatus for injecting ground hardening agent - Google Patents

Method and apparatus for injecting ground hardening agent Download PDF

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KR960013587B1
KR960013587B1 KR1019930000785A KR930000785A KR960013587B1 KR 960013587 B1 KR960013587 B1 KR 960013587B1 KR 1019930000785 A KR1019930000785 A KR 1019930000785A KR 930000785 A KR930000785 A KR 930000785A KR 960013587 B1 KR960013587 B1 KR 960013587B1
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spray nozzle
ground
nozzle
injection
air
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KR1019930000785A
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KR940018528A (en
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김기형
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김기형
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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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2250/00—Production methods
    • E02D2250/003—Injection of material

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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

The method and apparatus solidifies the earth ground by forming a large sized hardening layer composed of pure solidifying material within a short time. The method comprises rotating an injection rod(11) having solidifying material injection nozzles(32a,32b) connected to a 1st path(31), a water injection nozzle(24) connected to a 2nd path(22) and an air injection nozzle(25) connected to a 3rd path(23) while injecting the water, the air and the solidifying materials at a preset area with a pressure of 500-800 Kgf/cm2 in order to form a vortex of the solidifying materials among the nozzles(24,25,32a,32b).

Description

지반개량공법 및 그 장치Ground Improvement Method and Its Apparatus

제1도는 본 발명의 시공상태 전개도.1 is a development state of the construction of the present invention.

제2도는 본 발명의 주입로드 선단부 분리단면도.Figure 2 is a cross-sectional view of the injection rod end portion of the present invention.

제3도는 본 발명의 시공후 지반 횡단면도로서,3 is a ground cross-sectional view after construction of the present invention,

(A)도는 차수용 및 토류벽 경화층,(A) turning order and earth wall hardened layer,

(B)도는 토류기초 경화층,(B) the earth-based cured layer,

(C)도는 차수토류벽기초 경화층,(C) turning order earth wall foundation hardened layer,

제4도는 본 발명의 시공후 지반 종단면도로서,4 is a longitudinal cross-sectional view of the ground after construction of the present invention,

(A)도는 차수용 및 토류벽 경화층이고,(A) is an order and earth wall hardened layer,

(B)도는 토류기초 경화층이며,(B) is an earth-based cured layer,

(C)도는 차수토류벽기초 경화층이다.(C) is an ordered earth wall foundation hardened layer.

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

10 : 구동장치 11 : 주입로드10: drive device 11: injection rod

20 : 제1분사부 21 : 제1유로20: first injection unit 21: the first euro

22 : 제2유로 23 : 제3유로22: second euro 23: third euro

24 : 물 분사노즐 25 : 공기 분사노즐24: water jet nozzle 25: air jet nozzle

26 : 수나사부 30 : 제2분사부26: male thread part 30: second injection part

31 : 제1유로 32a,32b : 경화재 분사노즐31: First flow path 32a, 32b: Hardener spray nozzle

33 : 굴삭날 결합부 34 : 암나사부33: Excavator blade portion 34: Female thread portion

M : 대상지반 S : 경화층M: Target ground S: Hardened layer

본 발명은 지반을 강화시키는 지반 개량에 관한 것으로 특히, 수분의 침투를 방지하고, 단시간 내에 지반을 개량할 수 있도록한 지반개량공법 및 그 장치에 관한 것이다.The present invention relates to a ground improvement for strengthening the ground, and more particularly, to a ground improvement method and apparatus for preventing the penetration of water and improving the ground within a short time.

현재 사용되고 있는 지반개량공법에는 대사지반에 주입로드를 삽입하여 소정의 심도에서 지중토양을 삭토하여 삭토된 토양을 지상으로 내보내고, 이때 생기는 지중공간에 완결성 경화재를 고압고속으로 지중에 주입하는 공법과 순결성 경화재를 저압으로 주입시키는 공법이 있는데 양 공법은 지중에 경화층을 조성하여 지반을 개량하였다.In the currently used ground improvement method, the injection rod is inserted into the metabolic ground, the ground soil is cut at a predetermined depth, and the ground soil is discharged to the ground. There is a method of injecting the formed hardening material at a low pressure, both methods to improve the ground by forming a hardened layer in the ground.

이러한 종래의 공법은 삭토된 토양을 완전하게 지상으로 배출하지 못하여 경화재와 식토된 토양이 섞이어 경화층을 조성하므로 경화층의 강도 및 밀도가 낮아 견고하지 못할 뿐 아니라 차수효과가 저하되는 결점이 발생되었다.Since the conventional method does not completely discharge the ground soil to the ground, the hardened material and the soil is mixed to form a hardened layer, so that the strength and density of the hardened layer is not low, so that the defects of lowering the order effect occur. It became.

또, 이러한 결점을 보완하기 위하여 국내 특허공고 90-6932호도 있으나, 다음과 같은 결점이 있다.In addition, there is a domestic patent publication No. 90-6932 to compensate for this defect, but the following drawbacks.

즉, 상하로 물을 분사하여 하부 분사공에 의해 하단 분사공에서 분사되는 경화재와 삭토된 토양을 차단하도록 되어 있는데 구조가 복잡하고, 상하에 형성된 물 분사공이 동일라인에 연통되어 있어서 물의 분사압력이 약하므로 삭토되는 토양이 적게 되고 이로 인하여 직경이 큰 경화층을 형성할 수 없는 문제점이 있다.In other words, water is sprayed up and down to block the hardened material sprayed from the lower injection hole and the soil soiled by the lower injection hole, but the structure is complicated. Because of the weak soil is less soiled because of this there is a problem that can not form a large hardened layer.

또한 경화층의 직경을 크게 형성하기 위하여 국내 특허공고 92-1474호도 있으나, 역시 다음과 같은 결점이 있다.In addition, there is a domestic patent publication 92-1474 in order to form a large diameter of the cured layer, but also has the following drawbacks.

이것은 좌·우로 대응되는 분사공에 의해 분사시 분사반력을 상호 흡수하고, 순결성 경화재를 기체와 함께 분사시켜 토양절삭직경을 넓혀 경화층을 크게 형성하도록 되어있는데 이는 토양과 경화제가 섞이어 경화층을 형성하므로 밀도가 치밀하지 못하고 경화층의 구성요서에 토양성분이 많아 견고성이 저하되므로 지반 개량의 효율이 저하되었다.This is to absorb the reaction force during the injection by the injection hole corresponding to left and right, and to expand the soil cutting diameter by spraying the purity hardener with gas to form a hardened layer, which is mixed with soil and hardener. Since the density is not dense and the composition of the hardened layer has a lot of soil components, the firmness is lowered, so the efficiency of ground improvement is lowered.

또 토양성분이 경화층에 많이 함유되므로 수분의 침투가 우려되는 등의 문제점이 있었다.In addition, since the soil component is contained in a large amount of the hardened layer, there was a problem that the penetration of moisture is concerned.

이에 본 발명은 상기 문제점을 해소하기 위하여 안출된 것으로서, 그 목적으로서는 첫째, 작업속도 및 경화층의 직경을 최대로 확대하여 경화층을 조성할 수 있고, 둘째, 경화재에 삭토된 토양의 유입을 방지하여 밀도가 높은 순수 경화제로 된 경화층을 만들 수 있도록 한 지반개량공법 및 그 장치에 관한 것이다.Accordingly, the present invention has been made in order to solve the above problems, for the purpose, first, to maximize the working speed and the diameter of the hardened layer to form a hardened layer, and second, to prevent the inflow of soil cut into the hardened material The present invention relates to a ground improvement method and an apparatus for making a hardened layer made of a high density pure hardener.

위와 같은 목적을 위하여 본 발명은 주입로드 선단부에 제1유로와 연통하는 경화재 분사노즐, 경화재 분사노즐 상부에 제2유로와 연통한 물분사노즐, 제3유로와 연통하고 상기 물분사노즐을 포위하는 공기분사노즐을 형성한 주입로드를 대상지반중 소정위치에 삽입하여 지중에서 500~800Kgf/㎠의 압력으로 물, 공기, 경화제를 초고속 분사되도록 하고 상기 주입로드를 회전상승시켜 공기분사노즐 및 물분사노즐과, 경화제 분사노즐 사이에서 경화제가 와류되도록하여 경화층을 조성하도록 하는 지반개량공법이다.In order to achieve the above object, the present invention provides a hardener injection nozzle communicating with a first flow path at an injection rod tip, a water spray nozzle communicating with a second flow passage on an upper part of the hardener injection nozzle, and communicating with a third flow passage to surround the water spray nozzle. Insert the injection rod formed with the air injection nozzle into a predetermined position in the target ground to spray water, air, and hardener at a high pressure of 500 ~ 800Kgf / ㎠ in the ground, and increase the injection rod to rotate the air injection nozzle and water spray. It is a ground improvement method which forms a hardened layer by making a hardening agent vortex between a nozzle and a hardening | curing agent injection nozzle.

또 본 발명의 구성으로는 주입로드를 회전시켜 대상지반에 주입로드를 삽입하는 구동장치 ; 상기 주입로드의 선단부에 형성되는 제1유로, 제2유로 및 제3유로가 형성되고, 제2,3유로에 물분사노즐과 공기분사노즐을 각각 연통하여 측벽에 형성한 제1분사부 ; 상기 제1유로와 결합시 연통되는 또 다른 제1유로가 형성되고, 죄우측벽에 대칭으로 경화제 분사노즐을 부착하여 형성된 제2분사부로 구성된 것이 특징으로 하는 지반개량장치이다.In addition, the configuration of the present invention includes a drive device for rotating the injection rod to insert the injection rod into the target ground; A first injection section formed on the sidewall by forming a first flow passage, a second flow passage, and a third flow passage formed at the distal end of the injection rod and communicating water spray nozzles and air spray nozzles to the second and third flow passages, respectively; Another first flow passage is formed in communication with the first flow path is formed, the ground improvement apparatus characterized in that it comprises a second injection portion formed by attaching a hardener spray nozzle symmetrically to the right side wall.

이하 첨부된 도면을 참조하여 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

첨부된 예시도면 제1도 및 제2도에 도시된 바와 같이 제1분사부(20)는 제1유로(21)와 제2유로(22) 및 제3유로(23)를 형성한 3중관으로 제2유로(22)와 물분사노즐(24)를 연통시켜 제1분사부(20)의 측벽에 형성한다.As illustrated in FIGS. 1 and 2, the first injection unit 20 is a triple pipe formed with a first flow passage 21, a second flow passage 22, and a third flow passage 23. The second flow passage 22 and the water spray nozzle 24 communicate with each other and are formed on the sidewall of the first spray unit 20.

또 제3유로(23)는 공기분사노즐(25)과 연통시켜 형성하되, 상기 물분사노즐(24)을 감싸도록 포위하여 형성한다.In addition, the third flow path 23 is formed in communication with the air spray nozzle 25, it is formed to surround the water spray nozzle (24).

상부에는 주입로드(11)와 결합되는 수나선부가 형성되며, 하부에는 제2부사부(30)와 결합되는 또다른 수나선부(26)를 형성한다.The male thread portion coupled to the injection rod 11 is formed at the upper portion, and the other male thread portion 26 coupled to the second sub-scan portion 30 is formed at the lower portion.

제2분사부(30)는 상기 수나선부(26)의 결합되는 암나선부(34)를 상부에 형성하고, 하부에는 주입로드(11)이 지반 삽입시 토양을 절삭하면서 굴진하는 굴삭날을 결합할 수 있도록 굴삭날 결합부(33)을 형성한다.The second injection portion 30 forms a female spiral portion 34 coupled to the upper portion of the male spiral portion 26 on the upper portion, and the lower portion combines an excavation blade that excavates while cutting the soil when the injection rod 11 is inserted into the ground. Excavator blade coupling portion 33 is formed to enable.

상기 제1분사부(30)의 제1유로(21)와 결합시 연통되는 또 다른 제1유로(31)를 형성하고, 제1유로(31)와 연통된 경화재 주입노즐(32a,32b)을 좌우 측벽에 형성한다.Another first flow passage 31 is formed to communicate with the first flow passage 21 of the first injection portion 30, and the hardener injection nozzles 32a and 32b communicated with the first flow passage 31. It is formed on the left and right sidewalls.

또 상기 경화재 주입노즐(32a와 33b)는 좌우 대칭으로 형성한다.The hardener injection nozzles 32a and 33b are formed symmetrically.

본 발명의 작동시에는 먼저 대상지반에 구동장치(10)를 작동시켜 주입로드(11)를 지반에 소정깊이로 삽입한다.In the operation of the present invention, first, the driving device 10 is operated on the target ground to insert the injection rod 11 into the ground to a predetermined depth.

이때, 제2유로(22)와 제3유로(23)에 저압으로 물과 공기를 공급하여 분사하면서 주입로드(11)을 회전시켜 주입한다.At this time, the injection rod 11 is rotated and injected while supplying water and air at low pressure to the second passage 22 and the third passage 23.

따라서 물과 공기가 토양을 소량 절삭하고 윤활효과가 발생하므로 주입로드(11)의 지반삽입이 원활하며, 주입보드(11)의 회전으로 발생되는 마찰열을 식혀준다.Therefore, since water and air cut a small amount of soil and generate a lubricating effect, the ground insertion of the injection rod 11 is smooth, and the frictional heat generated by the rotation of the injection board 11 is cooled.

주입로드(11)가 소정깊이에 위치하게 되면 제2유로(22)와 제3유로(23)에 초고압(500~800Kgf/㎠)으로 물과 공기를 공급하여 물분사노즐(24)과 공기분사노즐(25)을 통해 물과 공기를 동시에 분사하여 대상지반을 절삭하고, 삭토된 토양은 압력에 의해 지상으로 배출시킨다.When the injection rod 11 is located at a predetermined depth, water and air are supplied to the second flow passage 22 and the third flow passage 23 at a very high pressure (500 to 800 Kgf / cm 2) to supply the water spray nozzle 24 and the air spray. Water and air are simultaneously sprayed through the nozzle 25 to cut the target ground, and the ground soil is discharged to the ground by pressure.

이때 제1유로(21,31)에도 경화재를 초고압(500~800kgf/㎠)으로 공급하여 좌우 대칭으로 형성된 경화재 분사노즐(32a,32b)에 의해 경화재를 분사하므로 삭토된 공간에 경화층을 조성한다.At this time, the hardening material is also supplied to the first flow paths 21 and 31 at an ultrahigh pressure (500 to 800 kgf / cm 2), and the hardening material is sprayed by the hardening material spray nozzles 32a and 32b formed symmetrically to form a hardened layer in the cut soil. .

또, 물분사노즐(24)를 포위하여 공기분사노즐(25)를 형성하므로 고압분사시 압력의 효율이 크게 되고, 따라서 직경이 큰 경화층을 조성한다.Moreover, since the air spray nozzle 25 is formed surrounding the water spray nozzle 24, the efficiency of pressure at the time of high pressure spraying becomes large, and a hardened layer with a large diameter is formed.

상기 물분사노즐(24)과 경화재 분사노즐(32b)은 소정간격으로 셋팅되고, 주입로드(11)가 회전하여 작동하므로 경화재가 물분사노즐(24)과 경화재 분사노즐(32b)를 사이에서 와류 현상이 발생되어 상부로 올라가므로 경화재의 분사압력의 회전되면서 상부로 작용한다.Since the water spray nozzle 24 and the hardener spray nozzle 32b are set at predetermined intervals, and the injection rod 11 rotates to operate, the hardener swirls between the water spray nozzle 24 and the hardener spray nozzle 32b. As the phenomenon occurs and rises to the upper part, the upper part acts as the injection pressure of the hardening material is rotated.

상기 물분사노즐(24)과 경화재 분사노즐(32b)의 간격은 압력이 500~800Kgf/㎠일 때 70~80㎝가 적당하다.The spacing between the water spray nozzle 24 and the hardener spray nozzle 32b is appropriately 70 to 80 cm when the pressure is 500 to 800 Kgf / cm 2.

또한 삭토된 토양의 배출의 공기 분사압과 물 분사압 및 경화제 분사압에 의해 경화재의 상단에서 지상으로 동시에 작용하므로 삭토된 토양의 지상 배출이 보다 용이하고 분사된 경화재에 삭토된 토양의 혼입이 방지된다.In addition, the air jet pressure, water jet pressure, and hardener jet pressure of the excavated soil are simultaneously acted from the top of the hardened material to the ground, which makes it easier to discharge the ground of the excavated soil and prevent the mixing of the soil excavated in the sprayed hardener. do.

따라서, 순수경화재만으로 경화층을 형성하므로 경화층의 밀도가 높고, 불순물(삭토된 토양등)의 혼입을 방지하므로 차수의 효과가 높다.Therefore, since the hardened layer is formed only by the pure hardening material, the hardened layer has a high density, and the effect of the order is high because the mixing of impurities (eg, the soil) is prevented.

또한 경화재, 물 및 공기이 분사를 고압처리하므로 종래 공법과 비교해 볼 때 동일시간 내에 본 발명은 직경이 큰경화층을 조성할 수 있으며, 동일 직경의 경화층을 여러개 조성할 수 있다.In addition, since the curing material, water and air high-pressure injection, compared to the conventional method, the present invention can form a cured layer having a large diameter within the same time, it is possible to form a plurality of cured layers of the same diameter.

상술한 바와 같이 본 발명은 간단한 구조로 종래 공법에 비하여 동일시간 내에 직경이 크고 순수경화재만으로 경화층을 조성할 수 있으므로 공사기간을 단축시킬 수 있음과 동시에, 차수효과가 우수한 잇점이 있는 것이다.As described above, since the present invention has a simple structure and a hardened layer can be formed with only a pure hardened material within the same time as the conventional method, the construction period can be shortened, and the order effect is excellent.

Claims (6)

주입로드(11)의 선단부에 제1유로(31)와 연통하는 경화재 분사노즐(32a,32b), 제2유로(22)와 연통한 물분사노즐(24), 제3유로(23)와 연통되어 물분사노즐(24)을 포위하는 공기분사노즐(25)을 형성한 주입로드(11)를 대상지반중의 소정위치에 삽입하여 500~800Kgf/㎠의 압력으로 회전시키면서 초고압으로 분사시켜 공기분사노즐(25) 및 물분사노즐(24)과 경화재 분사노즐(32a,32b) 사이에서 분사된 경화재가 와류되도록 하여 경화층을 조성하는 것을 특징으로 하는 지반개량공법.The hardener injection nozzles 32a and 32b communicating with the first flow passage 31 at the distal end of the injection rod 11 and the water spray nozzle 24 communicating with the second flow passage 22 and the third flow passage 23. And insert the injection rod 11 having the air spray nozzle 25 surrounding the water spray nozzle 24 at a predetermined position in the target ground, and spray at an ultra-high pressure while rotating at a pressure of 500 to 800 Kgf / cm 2. A ground improvement method, characterized by forming a hardened layer by causing the hardened material injected between the nozzle 25 and the water spray nozzle 24 and the hardened material spray nozzles 32a and 32b to vortex. 제1항에 있어서, 물분사노즐(24) 및 공기분사노즐(25)과 경화재 분사노즐(32b)을 소정간격으로 셋팅하여 삭토된 토양의 배출효과를 높이도록 와류하는 경화재의 상부를 물분사노즐(24) 및 공기 분사노즐(25)과 일치되도록 하는 것을 특징으로 하는 지반개량공법.The water spray nozzle according to claim 1, wherein the water spray nozzle (24), the air spray nozzle (25), and the hard spray nozzle (32b) are set at predetermined intervals to vortex the upper portion of the hardener to vortex the soil. (24) and the ground improvement method, characterized in that to match the air injection nozzle (25). 제1항에 있어서, 경화재의 와류현상 상부가 물분사노즐(24) 및 공기분사노즐(25)과 일치시켜 삭토된 토양의 지방배출이 원활하도록 하여 순수경화층을 조성할 수 있도록 상기 물분사노즐(24) 및 공기분사노즐(25)과 경화재 분사노즐(32b)와의 간격을 분사압력이 500~800Kgf/㎠일 때 70~80㎝로 형성하는 것을 특징으로 하는 지반개량장치.The water spray nozzle of claim 1, wherein an upper portion of the vortex phenomena of the hardener coincides with the water spray nozzles 24 and the air spray nozzles 25 so as to smoothly discharge the soil of the soil, to form a pure hardened layer. (24) and the ground improvement apparatus characterized in that the gap between the air spray nozzle (25) and the hardener injection nozzle (32b) is formed at 70 to 80 cm when the spray pressure is 500 to 800 Kgf / cm 2. 구동장치를 작동하여 대상지반의 지중으로 삽입되는 주입로드에 있어서, 상기 주입로드(11)의 선단부에 제1유로(21), 제2유로(22) 및 제3유로(23)의 제2,3유로(23,23)에 물분사노즐(24)고 공기분사노즐(25)를 각각 연통한 제1분사부(20) ; 상기 제1분사부(20)의 제1유로(21)와 연통되는 또다른 제1유로(31)를 형성하고, 제1유로(31)의 좌우 측벽에 대칭으로 경화재 분사노즐(32a,32b)을 형성한 제2분사부(30)로 구성된 것을 특징으로 하는 지반개량장치.In the injection rod inserted into the ground of the target ground by operating the drive device, the first, the second passage 22, the second passage 22 and the third passage 23, A first spray unit 20 in which the water spray nozzles 24 and the air spray nozzles 25 communicate with each of the three flow paths 23 and 23; Another first flow passage 31 is formed to communicate with the first flow passage 21 of the first injection portion 20, and the hardener injection nozzles 32a and 32b are symmetrically formed on the left and right side walls of the first flow passage 31. Ground improvement device, characterized in that consisting of a second injection portion 30 formed. 제4항에 있어서, 물분사의 효율을 극대화시켜 지중토양을 절삭하여 지상으로 배출되도록 상기 물분사노즐(24)에 공기분자노즐(25)이 포위되도록 구성된 것을 특징으로 하는 지반개량장치.The ground improvement apparatus according to claim 4, wherein an air molecular nozzle (25) is enclosed in the water spray nozzle (24) to maximize the efficiency of water spraying and to cut the ground soil to be discharged to the ground. 제4항에 있어서, 경화재의 와류현상의 상부가 물분사노즐(24) 및 공기분사노즐(25)과 일치시켜 삭토된 토양의 지상배출이 용이하도록 하여 순수경화층을 조성할 수 있도록 상기 물분사노즐(24) 및 공기분사노즐(25)과, 경화재 분사노즐(32b)와의 간격이 70~80㎝로 구성된 것을 특징으로 하는 지반개량장치.5. The water spray according to claim 4, wherein the upper part of the vortex phenomenon of the hardening material coincides with the water spray nozzle (24) and the air spray nozzle (25) to facilitate the ground discharge of the ground soil to form a pure hardened layer. A ground improvement device comprising a nozzle (24), an air spray nozzle (25), and a gap between the hardener spray nozzle (32b) and 70 to 80 cm.
KR1019930000785A 1993-01-21 1993-01-21 Method and apparatus for injecting ground hardening agent KR960013587B1 (en)

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