KR920009739B1 - Making method and apparatus of soil cement pile in situ - Google Patents

Making method and apparatus of soil cement pile in situ Download PDF

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Publication number
KR920009739B1
KR920009739B1 KR1019890014824A KR890014824A KR920009739B1 KR 920009739 B1 KR920009739 B1 KR 920009739B1 KR 1019890014824 A KR1019890014824 A KR 1019890014824A KR 890014824 A KR890014824 A KR 890014824A KR 920009739 B1 KR920009739 B1 KR 920009739B1
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South Korea
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injection
ground
protective tube
unit
injection rod
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KR1019890014824A
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Korean (ko)
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KR910008235A (en
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와타루 나카니시
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주식회사 표준개발
임병구
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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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  • 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 equipment includes a protective tube (51) for a certain unit depth (L) having an injection nozzle (53) provided in the side wall of the tube end and a unit tube (52) extending through the protective tube (51) in another length of the unit depth (L) and having an injection nozzle (54) provided in the sidewall of the tube end, the tubes (51,52) being provided thru an injection rod (5) being supported on a mount (1) with a holder (2) and a mechanism (3) for up and down movement of the injection rod (5). The solidifying agent feed hoses are connected to the injection rod via a swivel (6) and an excavating blade is attached to the tip of the extension tube (52). The tubes (51,52) placed in the ground in a depth of excavation injects the solidifying agent from the nozzles while the rod (5) withdraws in rotation out of the ground, thus forming a solidified ground.

Description

지반경화층 조성공법 및 그 장치Ground Hardening Layer Composition Method and Apparatus

제1도는 수직방향으로 지반경화층을 조성할 경우의 경화재가 주입되어지는 상태를 도시한 단면도.1 is a cross-sectional view showing a state in which a hardening material is injected when the ground hardened layer is formed in the vertical direction.

제2도는 경화재가 주입된 층의 조성상태를 도시한 단면도.2 is a cross-sectional view showing the composition of the layer in which the hardener is injected.

제3도는 조성된 경화재 주입층이 나란히 배열된 상태의 일례를 나타내는 사시도이다.3 is a perspective view showing an example of a state in which the cured material injection layers formed are arranged side by side.

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

1 : 설치대 2 : 주입기구지지대1: Mounting Table 2: Injection Device Support

3 : 지지대상하이동기구 4 : 이동수단3: support target moving mechanism 4: moving means

5 : 경화재주입로드 6 : 스위벨5: hardening material injection rod 6: swivel

51 : 보호관 52 : 단위관51: protective tube 52: unit tube

53,54 : 분사노즐 55 : 굴삭날53,54: injection nozzle 55: excavator blade

61,62 : 경화재공급호스 A : 보호관이 빠지기 직전의 위치61,62: Hardening material supply hose A: position just before the protection tube is removed

M : 경화재 주입층 W : 대상지반M: Hardener injection layer W: Target ground

본 발명은 경화층조성공법 및 그 장치에 관한 것으로, 특히 갱도나 터널등을 굴착할 때 붕괴현상이나 누수현상이 일어나지 않도록 무른지반을 경화층으로 만들도록 하는 지반경화층조성공법 및 그 장치에 관한 것이다.BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a hardened layer forming method and a device thereof, and more particularly, to a ground hardened layer forming method and apparatus for making a soft layer into a hardened layer so that collapse or leakage does not occur when excavating a tunnel or a tunnel. will be.

종래에는 이와 같은 지반경화층을 조성하기 위해 그 선단부에만 경화재(硬化材) 분사노즐 및 굴삭날을 갖춘 주입로드를 고속회전시키면서 아래쪽 또는 대상지반으로 삽입시켜, 이 주입로드가 소정깊이에 도달한 다음 경화재를 분산시키면서 상기 주입로드를 끄집어 내어 경화층을 조성하고, 이러한 경화층을 목적에 따라 병렬로 조성하고 있었다. 여기서 상기 주입로드에는 분사노즐을 여러개 설치함과 더불어 다단식으로 설치하거나 기타 여러 각도로 설정한다던지 위치를 선단부근에 집중시키도록 되어 있었다.Conventionally, in order to form such a ground hardened layer, an injection rod having a hardened material injection nozzle and an excavation blade is inserted into the lower portion or the target ground at high speed while the injection rod reaches a predetermined depth. The said injection rod was pulled out, disperse | distributing a hardening | curing material, and the hardening layer was formed, and these hardening layers were comprised in parallel according to the objective. Wherein the injection rod was installed to install a plurality of injection nozzles in a multi-stage or set to a number of other angles, such as to concentrate the position near the tip.

그러나, 이와 같은 종래의 조성방법은, 주입로드의 선단부에서만 경화재분사가 이루어지도록 되어 있기 때문에 경화층 1개에 대한 분사스트로크가 길어지게 되고, 또 경화재를 충분히 주입하기 위해서는 경화재를 분사하면서 회전하는 주입로드의 후퇴 속도가 천천히 이루어지도록 해야 하기 때문에 긴 시간이 소요되어 능률적이지 못하다고 하는 문제가 있었다.However, in such a conventional composition method, since the injection of the hardened material is performed only at the tip of the injection rod, the injection stroke for one hardened layer becomes long, and the injection that rotates while injecting the hardened material in order to inject the hardened material sufficiently. Since the retraction speed of the rod is to be made slowly, there is a problem that it takes a long time and is not efficient.

이에 본 발명은 상기 문제점을 해결하기 위해 발명된 것으로, 주입되는 경화재를 분산시켜 여러곳에서 동시에 분사작업을 진행할 수 있도록 주입예정깊이를 모두 같은 간격으로 분할해서 단위길이를 설정하고, 선단부 측벽에는 분사노즐이 설치되면서 단위 길이를 갖는 보호관과 이 보호관을 관통해서 단위길이만큼 더 연장된 선단측벽부에 분사노즐을 갖춘 단위관을 예정된 깊이까지 점점 신장(伸張) 시켜지도록 이루어진 지반 경화재 주입로드에 의해 분사주입이동이 단위길이만큼 이루어지도록 함으로써, 단숨에 예정깊이만큼 지반경화재를 주입시킬 수 있도록 된 지반경화재조성공법 및 그 장치를 제공함에 그 목적이 있다.Accordingly, the present invention has been invented to solve the above problems, by setting the unit length by dividing the expected depth of injection at the same interval so as to disperse the injected hardening material in several places at the same time, spraying on the tip side wall It is sprayed by a ground hardener injection rod configured to gradually extend a protective tube having a unit length and a unit tube having a spray nozzle to a predetermined depth through the protective tube having a unit length and penetrating the protective tube. It is an object of the present invention to provide a ground hardening material production method and apparatus capable of injecting ground hardening material at a predetermined depth by allowing the injection movement to be made by a unit length.

상기와 같은 목적을 달성하기 위한 본 발명은, 주입예정깊이가 모두 등간격으로부터 분할해서 단위길이를 설정되면서 이 단위길이에 대응하는 보호관을 포함한 각 단위관의 선단부 측벽에 분사노즐이 설치되기 때문에, 경화재를 주입하면서 후퇴되는 상기 경화재주입로드가 단위길이만큼 후퇴하게 되면 앞쪽 단위관의 분사노즐이 뒤쪽단위관에 해당하는 보호관끝의 분사노즐이 경화재를 주입하기 시작하는 위치까지 이동하게 되어, 앞쪽 단위관이 조성한 경화재주입층의 후단부와 뒷쪽 단위관이 조성한 경화재주입층의 선단부가 서로 만나게 되어 전체가 일체로 되면서 경화재주입층이 형성되게 된다.In order to achieve the above object, the present invention is because the injection nozzle is installed on the side wall of the distal end of each unit tube including the protective tube corresponding to the unit length while all the expected depth of injection is set by dividing the equal interval, When the hardener injection rod retracted while injecting the hardener by the unit length, the injection nozzle of the front unit pipe moves to the position where the injection nozzle at the end of the protective tube corresponding to the rear unit pipe starts to inject the hardener. The rear end of the hardener injection layer formed by the tube and the front end of the hardener injection layer formed by the rear unit tube meet each other, whereby the hardener injection layer is formed as a whole.

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

부호 1은 설치대로서, 이는 필요에 따라 캐터필러등과 같은 이동수단(4)을 갖춤과 더불어, 주입기구를 지지하는 지지대(2) 및 이 지지대(2)를 상하방향으로 이동시키는 이동기구(3)가 적재되어 있다.Reference numeral 1 is a mounting table, which is provided with a moving means 4 such as a caterpillar or the like as necessary, and a support 2 for supporting the injection mechanism and a moving mechanism 3 for moving the support 2 in the vertical direction. Is loaded.

그리고, 상기 설치대(1)에 지지되어져 있는 경화재 주입로드(5)는, 경화재의 주입예정깊이가 등간격으로 분할되어 설정시켜진 단위길이(L)만큼 삽입되면서, 선단부측벽에 분사노즐(53)을 갖춘 보호관(51)과 이 보호관(51)을 관통해서 그 선단이 2L 길이까지 신장되고 그 선단측벽부에도 분사노즐(54)이 갖춰진 단위관(52)으로 구성되면서, 이 단위관(52)의 선단에 굴삭날(55)이 구비되는 한편, 경화재 주입로드(5)의 위쪽끝에는 스위벨(6)을 매개로 경화재등을 공급하는 호스(61,62)와 접속되어 있다. 여기서 주입예정 깊이의 상황등에 따라 상기 단위관(52)을 다수개로 설정하여도 좋다.Then, the hardener injection rod 5 supported by the mounting table 1 is inserted into the unit length L set by dividing the estimated depth of hardener injection into equal intervals, and the injection nozzle 53 is attached to the tip side wall. The unit pipe 52 is composed of a protective tube 51 having a protection pipe 51 and a unit pipe 52 extending through the protective tube 51 and having a tip end extending to a length of 2L and having a jet nozzle 54 at the tip side wall portion thereof. The excavation blade 55 is provided at the tip of the rod, and the upper end of the hardener injection rod 5 is connected to the hoses 61 and 62 for supplying the hardener and the like through the swivel 6. Here, a plurality of unit pipes 52 may be set depending on the situation of the depth to be injected.

이상과 같은 장치를 이용하여 먼저 대상지반(W)에다 주입로드(5)의 선단부를 삽입한 다음, 공급호스(61,62)로부터 맑은물등과 같은 윤활액을 가압공급해서 분사노즐(53,54)로부터 분출시켜주면서 이 주입로드(5)를 회전시켜 대상지반(W)에 소정깊이만큼 삽입한다.Using the above-described apparatus, first insert the tip of the injection rod 5 into the target ground W, and then pressurize and supply lubricating liquid such as clear water from the supply hoses 61 and 62 to the injection nozzles 53 and 54. The injection rod 5 is rotated and ejected from the object ground W by a predetermined depth while being ejected from the base.

이어, 상기 주입로드(5)를 소정깊이만큼 삽입시켜놓은 곳에서 시멘트반죽등과 같은 지반경화재를 보호관(51)과 단위관(52)에 각각 가압해서 공급하여 분사노즐(53,54)로부터 고압으로 분사(예컨대 300kgf/㎠)시키면서 상기 주입로드(5)를 단위길이(L)만큼 회전하도록 하면서 후퇴시키게 되면, 상기 주입로드(5)의 주변토양에 경화재가 혼입되어져 2L 길이에 해당하는 지반경화층(M)이 조성되게 된다. 또 상기 경화재주입로드(5)를 후퇴시켜 보호관(51)이 완전히 빠지기 직전위치(A)에 도달하였을 때 상기 보호관(51)에 가압주입한 경화재 대신 가용성유리(Water glass)등과 같이 순식간에 응고되는 성질을 갖는 팩킹재로 교체해주게 되면, 삽입부 부근에 특별한 포장기(packer)를 갖쳐놓지 않더라도 경화재가 상기 대상지반(W)에 천천히 스며들 수 있게 된다.Subsequently, in the place where the injection rod 5 is inserted to a predetermined depth, ground hardening materials such as cement dough and the like are pressurized and supplied to the protective pipe 51 and the unit pipe 52, respectively, to supply high pressure from the injection nozzles 53 and 54. When the injection rod 5 is retracted while being rotated by the unit length L while spraying (eg 300 kgf / cm 2), the hardening material is mixed in the surrounding soil of the injection rod 5, and ground hardening corresponding to the length of 2 L is achieved. Layer M is to be formed. In addition, when the hardener injection rod 5 is retracted to reach the position A just before the protective tube 51 is completely removed, it solidifies in an instant such as soluble glass instead of hardened material injected into the protective tube 51. When the replacement with a packing material having a property, the hardening material can slowly penetrate the target ground (W) without having a special packer (packer) near the insertion portion.

이상과 같이 본 발명에 의하면, 대상지반(W)에 주입로드(5)를 삽입한 다음 경화재를 분사해서 분산시키되, 다수위치에서 동시에 분사작업을 한 다음 상기 주입로드(5)를 단위길이(L)만 후퇴이동시켜 주게 되면, 경화재가 주입된 지반경화층(M)이 단번에 완성되게 되므로서, 대상지반(W)에 경화재를 주입하는 시간이 크게 단축되게 되는 효과가 있다.According to the present invention as described above, the injection rod (5) is inserted into the target ground (W) and then sprayed and dispersed by the hardening material, and at the same time the injection operation in a plurality of positions and then the injection rod 5 unit length (L) If only the back) is moved, since the ground hardening layer M into which the hardening material is injected is completed at once, the time for injecting the hardening material into the target ground W is greatly shortened.

Claims (3)

경화재주입예정깊이가 모두 등간격으로 분할되어 설정된 단위길이(L)를 갖고서 선단부 측벽에 분사노즐(53)이 설치된 보호관(51) 및 이 보호관(51)을 관통해서 그 아래끝쪽이 단위길이(L)만큼 더 연장되면서 그 선단측벽부에 분사노즐(54)이 구비된 단위관(52)으로 이루어진 지반경화재주입로드(5)를 대상지반(W)에다 삽입한 다음, 상기 각 관(51,52)의 선단부노즐(53,54)로부터 경화재를 분사함과 동시에 상기 주입로드(5)를 회전시키면서 후퇴시켜 예정깊이까지 지반경화층(M)을 조성하도록 된 지반경화층 조성공법.Predetermined depth of hardening material injection is all divided at equal intervals, and has a unit length (L) set therein, and a protective tube 51 having a spray nozzle (53) installed on the side wall of the distal end, and the lower end of the unit (L) through the protective tube (51). And further inserting the ground hardening material injection rod 5 consisting of the unit pipe 52 having the injection nozzle 54 in the distal end side wall thereof into the target ground W, and then the respective pipes 51 and 52. A ground hardening layer composition method of forming a ground hardening layer (M) to a predetermined depth by retreating the injection rod (5) while rotating the injection rod (5) while discharging the hardening material from the distal end nozzles (53, 54). 제1항에 있어서, 상기 경화재주입로드(5)를 후퇴시켜 보호관(51)이 꺼내기 직전 위치(A)에 도달했을 때, 상기 보호관(51)에 가압되어 주입된 경화재 대신 순식간에 응고하는 성질을 갖는 팩킹재로 교환해서 주입시키도록 된 것을 특징으로 하는 지반경화층 조성공법.The method of claim 1, wherein when the hardener injection rod 5 is retracted to reach the position A just before the protective tube 51 is taken out, the hardener is pressed into the protective tube 51 to solidify in an instant instead of the hardened material injected. A ground hardening layer composition method, characterized in that to be replaced by a packing material having a. 경화재주입예정깊이가 모두 등간격으로 분할되어 설정시켜진 단위길이(L)에 해당하는 길이를 갖고 선단부 측벽에 분사노즐(53)이 구비된 보호관(51) 및 이 보호관(51)을 관통해서 그 아래쪽끝이 단위길이(L)만큼 더 연장되어 그 선단측벽부에 분사노즐(54)을 갖춘 단위관(52)으로 구성되면서, 상기 각 관(51,52)이, 지반경화재등의 공급부와 연결된 지반경화재주입로드(5)를 회전시키거나 추진시키고 후퇴시키는 구동기구(3)를 갖춘 설치대(1)에 지지시켜진 지반경화층 조성장치.Through the protective tube 51 and the protective tube 51 having the injection nozzle 53 on the side wall of the distal end portion having a length corresponding to the unit length (L) set by dividing the estimated depth of hardening material injection into all equal intervals The lower end extends further by the unit length (L) and consists of the unit pipes 52 having the injection nozzles 54 at the front end side walls thereof, and the respective pipes 51 and 52 are connected to a supply part such as ground hardener. A ground hardening layer forming apparatus supported on a mounting table (1) having a drive mechanism (3) for rotating, pushing, and retracting the ground hardening material injection rod (5).
KR1019890014824A 1989-10-16 1989-10-16 Making method and apparatus of soil cement pile in situ KR920009739B1 (en)

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